Class: Magick::Image

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/rmagick_internal.rb,
ext/RMagick/rmmain.cpp

Overview

Ruby-level Magick::Image methods

Defined Under Namespace

Classes: DrawOptions, Info, PolaroidOptions, View

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9949

VALUE
Image_initialize(int argc, VALUE *argv, VALUE self)
{
    VALUE fill = Qnil;
    Info *info;
    VALUE info_obj;
    Image *image;
    unsigned long cols, rows;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    switch (argc)
    {
        case 3:
            fill = argv[2];
        case 2:
            rows = NUM2ULONG(argv[1]);
            cols = NUM2ULONG(argv[0]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)", argc);
            break;
    }

    // Create a new Info object to use when creating this image.
    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, info);

    image = rm_acquire_image(info);
    if (!image)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }

    rm_set_user_artifact(image, info);

    // NOW store a real image in the image object.
    UPDATE_DATA_PTR(self, image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SetImageExtent) args = { image, cols, rows, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageExtent), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SetImageExtent) args = { image, cols, rows };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageExtent), &args);
#endif

    rm_sync_image_options(image, info);

    // If the caller did not supply a fill argument, call SetImageBackgroundColor
    // to fill the image using the background color. The background color can
    // be set by specifying it when creating the Info parm block.
    if (NIL_P(fill))
    {
#if defined(IMAGEMAGICK_7)
        exception = AcquireExceptionInfo();
        GVL_STRUCT_TYPE(SetImageBackgroundColor) args = { image, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageBackgroundColor), &args);
        CHECK_EXCEPTION();
        DestroyExceptionInfo(exception);
#else
        GVL_STRUCT_TYPE(SetImageBackgroundColor) args = { image };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageBackgroundColor), &args);
#endif
    }
    // fillobj.fill(self)
    else
    {
        rb_funcall(fill, rm_ID_fill, 1, self);
    }

    RB_GC_GUARD(fill);
    RB_GC_GUARD(info_obj);

    return self;
}

Class Method Details

._load(str) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8958

VALUE
Image__load(VALUE klass ATTRIBUTE_UNUSED, VALUE str)
{
    Image *image;
    ImageInfo *info;
    DumpedImage mi;
    ExceptionInfo *exception;
    char *blob;
    size_t length;

    blob = rm_str2cstr(&str, &length);

    // Must be at least as big as the 1st 4 fields in DumpedImage
    if (length <= (long)(sizeof(DumpedImage)-MaxTextExtent))
    {
        rb_raise(rb_eTypeError, "image is invalid or corrupted (too short)");
    }

    // Retrieve & validate the image format from the header portion
    mi.id = ((DumpedImage *)blob)->id;
    if (mi.id != DUMPED_IMAGE_ID)
    {
        rb_raise(rb_eTypeError, "image is invalid or corrupted (invalid header)");
    }

    mi.mj = ((DumpedImage *)blob)->mj;
    mi.mi = ((DumpedImage *)blob)->mi;
    if (   mi.mj != DUMPED_IMAGE_MAJOR_VERS
           || mi.mi > DUMPED_IMAGE_MINOR_VERS)
    {
        rb_raise(rb_eTypeError, "incompatible image format (can't be read)\n"
                 "\tformat version %d.%d required; %d.%d given",
                 DUMPED_IMAGE_MAJOR_VERS, DUMPED_IMAGE_MINOR_VERS,
                 mi.mj, mi.mi);
    }

    mi.len = ((DumpedImage *)blob)->len;

    // Must be bigger than the header
    if (length <= (mi.len + sizeof(DumpedImage) - MaxTextExtent))
    {
        rb_raise(rb_eTypeError, "image is invalid or corrupted (too short)");
    }

    info = CloneImageInfo(NULL);

    memcpy(info->magick, ((DumpedImage *)blob)->magick, mi.len);
    info->magick[mi.len] = '\0';

    exception = AcquireExceptionInfo();

    blob += offsetof(DumpedImage, magick) + mi.len;
    length -= offsetof(DumpedImage, magick) + mi.len;
    GVL_STRUCT_TYPE(BlobToImage) args = { info, blob, (size_t)length, exception };
    image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlobToImage), &args);
    DestroyImageInfo(info);

    rm_check_exception(exception, image, DestroyOnError);
    DestroyExceptionInfo(exception);

    RB_GC_GUARD(str);

    return rm_image_new(image);
}

.capture(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2269

VALUE
Image_capture(int argc, VALUE *argv, VALUE self ATTRIBUTE_UNUSED)
{
    Image *new_image;
    ImageInfo *image_info;
    VALUE info_obj;
    XImportInfo ximage_info;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    XGetImportInfo(&ximage_info);
    switch (argc)
    {
        case 5:
            ximage_info.borders = (MagickBooleanType)RTEST(argv[4]);
        case 4:
            ximage_info.screen  = (MagickBooleanType)RTEST(argv[3]);
        case 3:
            ximage_info.descend = (MagickBooleanType)RTEST(argv[2]);
        case 2:
            ximage_info.frame   = (MagickBooleanType)RTEST(argv[1]);
        case 1:
            ximage_info.silent  = (MagickBooleanType)RTEST(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 5)", argc);
            break;
    }

    // Get optional parms.
    // Set info->filename = "root", window ID number or window name,
    //  or nothing to do an interactive capture
    // Set info->server_name to the server name
    // Also info->colorspace, depth, dither, interlace, type
    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, image_info);

    // If an error occurs, IM will call our error handler and we raise an exception.
#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    new_image = XImportImage(image_info, &ximage_info, exception);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    new_image = XImportImage(image_info, &ximage_info);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    rm_ensure_result(new_image);

    rm_set_user_artifact(new_image, image_info);
    rm_sync_image_options(new_image, image_info);

    RB_GC_GUARD(info_obj);

    return rm_image_new(new_image);
}

.constitute(width_arg, height_arg, map_arg, pixels_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4347

VALUE
Image_constitute(VALUE klass ATTRIBUTE_UNUSED, VALUE width_arg, VALUE height_arg,
                 VALUE map_arg, VALUE pixels_arg)
{
    Image *new_image;
    VALUE pixel, pixel0;
    long x, npixels;
    size_t width, height, map_l;
    char *map;
    volatile union
    {
        double *f;
        Quantum *i;
        void *v;
    } pixels;
    VALUE pixel_class;
    StorageType stg_type;
    ExceptionInfo *exception;

    // rb_Array converts objects that are not Arrays to Arrays if possible,
    // and raises TypeError if it can't.
    pixels_arg = rb_Array(pixels_arg);

    if (NUM2LONG(width_arg) <= 0 || NUM2LONG(height_arg) <= 0)
    {
        rb_raise(rb_eArgError, "width and height must be greater than zero");
    }

    width = NUM2LONG(width_arg);
    height = NUM2LONG(height_arg);
    map = rm_str2cstr(&map_arg, &map_l);

    npixels = width * height * map_l;
    if (RARRAY_LEN(pixels_arg) != npixels)
    {
        rb_raise(rb_eArgError, "wrong number of array elements (%ld for %ld)",
                 RARRAY_LEN(pixels_arg), npixels);
    }

    // Inspect the first element in the pixels array to determine the expected
    // type of all the elements. Allocate the pixel buffer.
    pixel0 = rb_ary_entry(pixels_arg, 0);
    if (rb_obj_is_kind_of(pixel0, rb_cFloat) == Qtrue)
    {
        pixels.f = ALLOC_N(double, npixels);
        stg_type = DoublePixel;
        pixel_class = rb_cFloat;
    }
    else if (rb_obj_is_kind_of(pixel0, rb_cInteger) == Qtrue)
    {
        pixels.i = ALLOC_N(Quantum, npixels);
        stg_type = QuantumPixel;
        pixel_class = rb_cInteger;
    }
    else
    {
        rb_raise(rb_eTypeError, "element 0 in pixel array is %s, must be numeric",
                 rb_class2name(CLASS_OF(pixel0)));
    }



    // Convert the array elements to the appropriate C type, store in pixel
    // buffer.
    for (x = 0; x < npixels; x++)
    {
        pixel = rb_ary_entry(pixels_arg, x);
        if (rb_obj_is_kind_of(pixel, pixel_class) != Qtrue)
        {
            xfree(pixels.v);
            rb_raise(rb_eTypeError, "element %ld in pixel array is %s, expected %s",
                     x, rb_class2name(CLASS_OF(pixel)), rb_class2name(CLASS_OF(pixel0)));
        }
        if (pixel_class == rb_cFloat)
        {
            pixels.f[x] = (float) NUM2DBL(pixel);
            if (pixels.f[x] < 0.0 || pixels.f[x] > 1.0)
            {
                xfree(pixels.v);
                rb_raise(rb_eArgError, "element %ld is out of range [0..1]: %f", x, pixels.f[x]);
            }
        }
        else
        {
            pixels.i[x] = NUM2QUANTUM(pixel);
        }
    }

    // This is based on ConstituteImage in IM 5.5.7
    new_image = rm_acquire_image((ImageInfo *) NULL);
    if (!new_image)
    {
        xfree(pixels.v);
        rb_raise(rb_eNoMemError, "not enough memory to continue.");
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SetImageExtent) args_SetImageExtent = { new_image, width, height, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageExtent), &args_SetImageExtent);
#else
    GVL_STRUCT_TYPE(SetImageExtent) args_SetImageExtent = { new_image, width, height };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageExtent), &args_SetImageExtent);
    exception = &new_image->exception;
#endif

    if (rm_should_raise_exception(exception, RetainExceptionRetention))
    {
        xfree(pixels.v);
#if defined(IMAGEMAGICK_7)
        DestroyImage(new_image);
        rm_raise_exception(exception);
#else
        rm_check_image_exception(new_image, DestroyOnError);
#endif
    }

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(SetImageBackgroundColor) args_SetImageBackgroundColor = { new_image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageBackgroundColor), &args_SetImageBackgroundColor);
#else
    GVL_STRUCT_TYPE(SetImageBackgroundColor) args_SetImageBackgroundColor = { new_image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageBackgroundColor), &args_SetImageBackgroundColor);
    exception = &new_image->exception;
#endif

    if (rm_should_raise_exception(exception, RetainExceptionRetention))
    {
        xfree(pixels.v);
#if defined(IMAGEMAGICK_7)
        DestroyImage(new_image);
        rm_raise_exception(exception);
#else
        rm_check_image_exception(new_image, DestroyOnError);
#endif
    }

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(ImportImagePixels) args_ImportImagePixels = { new_image, 0, 0, width, height, map, stg_type, (const void *)pixels.v, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ImportImagePixels), &args_ImportImagePixels);
    xfree(pixels.v);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(ImportImagePixels) args_ImportImagePixels = { new_image, 0, 0, width, height, map, stg_type, (const void *)pixels.v };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ImportImagePixels), &args_ImportImagePixels);
    xfree(pixels.v);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    RB_GC_GUARD(pixel);
    RB_GC_GUARD(pixel0);
    RB_GC_GUARD(pixel_class);
    RB_GC_GUARD(map_arg);

    return rm_image_new(new_image);
}

.from_blob(blob_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7351

VALUE
Image_from_blob(VALUE klass ATTRIBUTE_UNUSED, VALUE blob_arg)
{
    Image *images;
    Info *info;
    VALUE info_obj;
    ExceptionInfo *exception;
    void *blob;
    size_t length;

    blob = (void *) rm_str2cstr(&blob_arg, &length);

    // Get a new Info object - run the parm block if supplied
    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, info);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(BlobToImage) args = { info,  blob, (size_t)length, exception };
    images = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlobToImage), &args);
    rm_check_exception(exception, images, DestroyOnError);

    DestroyExceptionInfo(exception);

    rm_ensure_result(images);
    rm_set_user_artifact(images, info);
    rm_sync_image_options(images, info);

    RB_GC_GUARD(info_obj);
    RB_GC_GUARD(blob_arg);

    return array_from_images(images);
}

.ping(file_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10642

VALUE
Image_ping(VALUE klass, VALUE file_arg)
{
    return rd_image(klass, file_arg, GVL_FUNC(PingImage));
}

.read(file_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11563

VALUE
Image_read(VALUE klass, VALUE file_arg)
{
    return rd_image(klass, file_arg, GVL_FUNC(ReadImage));
}

.read_inline(content) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11776

VALUE
Image_read_inline(VALUE self ATTRIBUTE_UNUSED, VALUE content)
{
    VALUE info_obj;
    Image *images;
    ImageInfo *info;
    char *image_data;
    size_t x, image_data_l;
    unsigned char *blob;
    size_t blob_l;
    ExceptionInfo *exception;

    image_data = rm_str2cstr(&content, &image_data_l);

    // Search for a comma. If found, we'll set the start of the
    // image data just following the comma. Otherwise we'll assume
    // the image data starts with the first byte.
    for (x = 0; x < image_data_l; x++)
    {
        if (image_data[x] == ',')
        {
            break;
        }
    }
    if (x < image_data_l)
    {
        image_data += x + 1;
    }

    GVL_STRUCT_TYPE(Base64Decode) args_Base64Decode = { image_data, &blob_l };
    blob = (unsigned char *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(Base64Decode), &args_Base64Decode);
    if (blob_l == 0)
    {
        rb_raise(rb_eArgError, "can't decode image");
    }

    exception = AcquireExceptionInfo();

    // Create a new Info structure for this read. About the
    // only useful attribute that can be set is `format'.
    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, info);

    GVL_STRUCT_TYPE(BlobToImage) args_BlobToImage = { info, blob, blob_l, exception };
    images = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlobToImage), &args_BlobToImage);
    magick_free((void *)blob);

    rm_check_exception(exception, images, DestroyOnError);
    DestroyExceptionInfo(exception);

    rm_set_user_artifact(images, info);
    rm_sync_image_options(images, info);

    RB_GC_GUARD(info_obj);
    RB_GC_GUARD(content);

    return array_from_images(images);
}

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13448

VALUE
Image_spaceship(VALUE self, VALUE other)
{
    Image *imageA, *imageB;
    const char *sigA, *sigB;
    int res;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    imageA = rm_check_destroyed(self);

    // If the other object isn't a Image object, then they can't be equal.
    if (!rb_obj_is_kind_of(other, Class_Image))
    {
        return Qnil;
    }

    imageB = rm_check_destroyed(other);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SignatureImage) args1 = { imageA, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SignatureImage), &args1);
    CHECK_EXCEPTION();
    GVL_STRUCT_TYPE(SignatureImage) args2 = { imageB, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SignatureImage), &args2);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SignatureImage) args1 = { imageA };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SignatureImage), &args1);
    GVL_STRUCT_TYPE(SignatureImage) args2 = { imageB };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SignatureImage), &args2);
#endif
    sigA = rm_get_property(imageA, "signature");
    sigB = rm_get_property(imageB, "signature");
    if (!sigA || !sigB)
    {
        rb_raise(Class_ImageMagickError, "can't get image signature");
    }

    res = memcmp(sigA, sigB, 64);
    res = res > 0 ? 1 : (res < 0 ? -1 :  0);    // reduce to 1, -1, 0

    return INT2FIX(res);
}

#[](key_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 962

VALUE
 Image_aref(VALUE self, VALUE key_arg)
{
    Image *image;
    const char *key;
    const char *attr;

    image = rm_check_destroyed(self);

    switch (TYPE(key_arg))
    {
        case T_NIL:
            return Qnil;

        case T_SYMBOL:
            key = rb_id2name((ID)SYM2ID(key_arg));
            break;

        default:
            key = StringValueCStr(key_arg);
            if (*key == '\0')
            {
                return Qnil;
            }
            break;
    }


    if (rm_strcasecmp(key, "EXIF:*") == 0)
    {
        return rm_exif_by_entry(image);
    }
    else if (rm_strcasecmp(key, "EXIF:!") == 0)
    {
        return rm_exif_by_number(image);
    }

    attr = rm_get_property(image, key);
    return attr ? rb_str_new2(attr) : Qnil;
}

#[]=(key_arg, attr_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1017

VALUE
Image_aset(VALUE self, VALUE key_arg, VALUE attr_arg)
{
    Image *image;
    const char *key;
    char *attr;
    unsigned int okay;

    image = rm_check_frozen(self);

    attr = attr_arg == Qnil ? NULL : StringValueCStr(attr_arg);

    switch (TYPE(key_arg))
    {
        case T_NIL:
            return self;

        case T_SYMBOL:
            key = rb_id2name((ID)SYM2ID(key_arg));
            break;

        default:
            key = StringValueCStr(key_arg);
            if (*key == '\0')
            {
                return self;
            }
            break;
    }


    // Delete existing value. SetImageProperty returns False if
    // the attribute doesn't exist - we don't care.
    rm_set_property(image, key, NULL);
    // Set new value
    if (attr)
    {
        okay = rm_set_property(image, key, attr);
        if (!okay)
        {
            rb_warning("SetImageProperty failed (probably out of memory)");
        }
    }
    return self;
}

#_dump(depth) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6131

VALUE
Image__dump(VALUE self, VALUE depth ATTRIBUTE_UNUSED)
{
    Image *image;
    ImageInfo *info;
    void *blob;
    size_t length;
    DumpedImage mi;
    VALUE str;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    info = CloneImageInfo(NULL);
    if (!info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }
    strlcpy(info->magick, image->magick, sizeof(info->magick));

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ImageToBlob) args = { info, image, &length, exception };
    blob = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ImageToBlob), &args);

    // Free ImageInfo first - error handling may raise an exception
    DestroyImageInfo(info);

    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    if (!blob)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }

    // Create a header for the blob: ID and version
    // numbers, followed by the length of the magick
    // string stored as a byte, followed by the
    // magick string itself.
    mi.id = DUMPED_IMAGE_ID;
    mi.mj = DUMPED_IMAGE_MAJOR_VERS;
    mi.mi = DUMPED_IMAGE_MINOR_VERS;
    strlcpy(mi.magick, image->magick, sizeof(mi.magick));
    mi.len = (unsigned char) min((size_t)UCHAR_MAX, rm_strnlen_s(mi.magick, sizeof(mi.magick)));

    // Concatenate the blob onto the header & return the result
    str = rb_str_new((char *)&mi, (long)(mi.len+offsetof(DumpedImage, magick)));
    str = rb_str_buf_cat(str, (char *)blob, (long)length);
    magick_free((void*)blob);

    RB_GC_GUARD(str);

    return str;
}

#adaptive_blur(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 439

VALUE
Image_adaptive_blur(int argc, VALUE *argv, VALUE self)
{
    return adaptive_method(argc, argv, self, GVL_FUNC(AdaptiveBlurImage));
}

#adaptive_blur_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 461

VALUE
Image_adaptive_blur_channel(int argc, VALUE *argv, VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return adaptive_channel_method(argc, argv, self, GVL_FUNC(AdaptiveBlurImage));
#else
    return adaptive_channel_method(argc, argv, self, GVL_FUNC(AdaptiveBlurImageChannel));
#endif
}

#adaptive_resize(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 486

VALUE
Image_adaptive_resize(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    unsigned long rows, columns;
    double scale_val, drows, dcols;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 2:
            rows = NUM2ULONG(argv[1]);
            columns = NUM2ULONG(argv[0]);
            break;
        case 1:
            scale_val = NUM2DBL(argv[0]);
            if (scale_val < 0.0)
            {
                rb_raise(rb_eArgError, "invalid scale_val value (%g given)", scale_val);
            }
            drows = scale_val * image->rows + 0.5;
            dcols = scale_val * image->columns + 0.5;
            if (drows > (double)ULONG_MAX || dcols > (double)ULONG_MAX)
            {
                rb_raise(rb_eRangeError, "resized image too big");
            }
            rows = (unsigned long) drows;
            columns = (unsigned long) dcols;
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or 2)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(AdaptiveResizeImage) args = { image, columns, rows, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(AdaptiveResizeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#adaptive_sharpen(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 547

VALUE
Image_adaptive_sharpen(int argc, VALUE *argv, VALUE self)
{
    return adaptive_method(argc, argv, self, GVL_FUNC(AdaptiveSharpenImage));
}

#adaptive_sharpen_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 569

VALUE
Image_adaptive_sharpen_channel(int argc, VALUE *argv, VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return adaptive_channel_method(argc, argv, self, GVL_FUNC(AdaptiveSharpenImage));
#else
    return adaptive_channel_method(argc, argv, self, GVL_FUNC(AdaptiveSharpenImageChannel));
#endif
}

#adaptive_threshold(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 591

VALUE
Image_adaptive_threshold(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    unsigned long width = 3, height = 3;
    double bias = 0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 3:
            bias = NUM2DBL(argv[2]);
        case 2:
            height = NUM2ULONG(argv[1]);
        case 1:
            width  = NUM2ULONG(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 3)", argc);
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(AdaptiveThresholdImage) args = { image, width, height, bias, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(AdaptiveThresholdImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#add_compose_mask(mask) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 636

VALUE
Image_add_compose_mask(VALUE self, VALUE mask)
{
    Image *image, *mask_image = NULL;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
    Image *clip_mask = NULL;
#endif

    image = rm_check_frozen(self);
    mask_image = rm_check_destroyed(rm_cur_image(mask));
    if (image->columns != mask_image->columns || image->rows != mask_image->rows)
    {
        rb_raise(rb_eArgError, "mask must be the same size as image");
    }

#if defined(IMAGEMAGICK_7)
    clip_mask = rm_clone_image(mask_image);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(NegateImage) args_NegateImage = { clip_mask, MagickFalse, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NegateImage), &args_NegateImage);
    rm_check_exception(exception, clip_mask, DestroyOnError);
    GVL_STRUCT_TYPE(SetImageMask) args_SetImageMask = { image, CompositePixelMask, clip_mask, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageMask), &args_SetImageMask);
    DestroyImage(clip_mask);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    // Delete any previously-existing mask image.
    // Store a clone of the new mask image.
    GVL_STRUCT_TYPE(SetImageMask) args_SetImageMask = { image, mask_image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageMask), &args_SetImageMask);
    GVL_STRUCT_TYPE(NegateImage) args_NegateImage = { image->mask, MagickFalse };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NegateImage), &args_NegateImage);

    // Since both Set and GetImageMask clone the mask image I don't see any
    // way to negate the mask without referencing it directly. Sigh.
#endif

    return self;
}

#add_noise(noise) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 686

VALUE
Image_add_noise(VALUE self, VALUE noise)
{
    Image *image, *new_image;
    NoiseType noise_type;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    VALUE_TO_ENUM(noise, noise_type, NoiseType);

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(AddNoiseImage) args = { image, noise_type, 1.0, exception };
#else
    GVL_STRUCT_TYPE(AddNoiseImage) args = { image, noise_type, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(AddNoiseImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#add_noise_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 723

VALUE
Image_add_noise_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    NoiseType noise_type;
    ExceptionInfo *exception;
    ChannelType channels;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // There must be 1 remaining argument.
    if (argc == 0)
    {
        rb_raise(rb_eArgError, "missing noise type argument");
    }
    else if (argc > 1)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    VALUE_TO_ENUM(argv[0], noise_type, NoiseType);
    channels = (ChannelType)(channels & ~OpacityChannel);

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(AddNoiseImage) args = { image, noise_type, 1.0, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(AddNoiseImage), &args);
    END_CHANNEL_MASK(new_image);
#else
    GVL_STRUCT_TYPE(AddNoiseImageChannel) args = { image, channels, noise_type, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(AddNoiseImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#add_profile(name) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 771

VALUE
Image_add_profile(VALUE self, VALUE name)
{
    // ImageMagick code based on the code for the "-profile" option in mogrify.c
    Image *image, *profile_image;
    ImageInfo *info;
    ExceptionInfo *exception;
    char *profile_name;
    char *profile_filename = NULL;
    const StringInfo *profile;

    image = rm_check_frozen(self);

    // ProfileImage issues a warning if something goes wrong.
    profile_filename = StringValueCStr(name);

    info = CloneImageInfo(NULL);
    if (!info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }
    profile = GetImageProfile(image, "iptc");
    if (profile)
    {
        info->profile = (void *)CloneStringInfo(profile);
    }
    strlcpy(info->filename, profile_filename, sizeof(info->filename));

    exception = AcquireExceptionInfo();
    profile_image = ReadImage(info, exception);
    DestroyImageInfo(info);
    rm_check_exception(exception, profile_image, DestroyOnError);
    rm_ensure_result(profile_image);

    ResetImageProfileIterator(profile_image);
    profile_name = GetNextImageProfile(profile_image);
    while (profile_name)
    {
        profile = GetImageProfile(profile_image, profile_name);
        if (profile)
        {
#if defined(IMAGEMAGICK_7)
            GVL_STRUCT_TYPE(ProfileImage) args = { image, profile_name, GetStringInfoDatum(profile), GetStringInfoLength(profile), exception };
            CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ProfileImage), &args);
            if (rm_should_raise_exception(exception, RetainExceptionRetention))
#else
            GVL_STRUCT_TYPE(ProfileImage) args = { image, profile_name, GetStringInfoDatum(profile), GetStringInfoLength(profile), MagickFalse };
            CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ProfileImage), &args);
            if (rm_should_raise_exception(&image->exception, RetainExceptionRetention))
#endif
            {
                break;
            }
        }
        profile_name = GetNextImageProfile(profile_image);
    }

    DestroyImage(profile_image);
#if defined(IMAGEMAGICK_7)
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    DestroyExceptionInfo(exception);
    rm_check_image_exception(image, RetainOnError);
#endif

    return self;
}

#affine_transform(affine) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 927

VALUE
Image_affine_transform(VALUE self, VALUE affine)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    AffineMatrix matrix;

    image = rm_check_destroyed(self);

    // Convert Magick::AffineMatrix to AffineMatrix structure.
    Export_AffineMatrix(&matrix, affine);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(AffineTransformImage) args = { image, &matrix, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(AffineTransformImage), &args);
    new_image = reinterpret_cast<decltype(new_image)>(ret);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#alpha(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 863

VALUE
Image_alpha(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    AlphaChannelOption alpha;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif


    // For backward compatibility, make alpha() act like alpha?
    if (argc == 0)
    {
        return Image_alpha_q(self);
    }
    else if (argc > 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 1)", argc);
    }


    image = rm_check_frozen(self);
    VALUE_TO_ENUM(argv[0], alpha, AlphaChannelOption);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SetImageAlphaChannel) args = { image, alpha, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageAlphaChannel), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SetImageAlphaChannel) args = { image, alpha };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageAlphaChannel), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    return argv[0];
}

#alpha? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 909

VALUE
Image_alpha_q(VALUE self)
{
    Image *image = rm_check_destroyed(self);
#if defined(IMAGEMAGICK_7)
    return image->alpha_trait == BlendPixelTrait ? Qtrue : Qfalse;
#else
    return GetImageAlphaChannel(image) ? Qtrue : Qfalse;
#endif
}

#annotate(draw, width, height, x, y, text) ⇒ Object

Provide an alternate version of Draw#annotate, for folks who want to find it in this class.



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# File 'lib/rmagick_internal.rb', line 777

def annotate(draw, width, height, x, y, text, &)
  check_destroyed
  draw.annotate(self, width, height, x, y, text, &)
  self
end

#artifact(artifact) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5272

VALUE
Image_artifact(VALUE self, VALUE artifact)
{
    Image *image;
    const char *value;

    image = rm_check_destroyed(self);
    artifact = rb_String(artifact);
    value = GetImageArtifact(image, StringValueCStr(artifact));

    return value ? rb_str_new2(value) : Qnil;
}

#auto_gamma_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1171

VALUE
Image_auto_gamma_channel(int argc, VALUE *argv, VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return auto_channel(argc, argv, self, GVL_FUNC(AutoGammaImage));
#else
    return auto_channel(argc, argv, self, GVL_FUNC(AutoGammaImageChannel));
#endif
}

#auto_level_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1193

VALUE
Image_auto_level_channel(int argc, VALUE *argv, VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return auto_channel(argc, argv, self, GVL_FUNC(AutoLevelImage));
#else
    return auto_channel(argc, argv, self, GVL_FUNC(AutoLevelImageChannel));
#endif
}

#auto_orient ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1282

VALUE
Image_auto_orient(VALUE self)
{
    rm_check_destroyed(self);
    return auto_orient(False, self);
}

#auto_orient! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1299

VALUE
Image_auto_orient_bang(VALUE self)
{
    rm_check_frozen(self);
    return auto_orient(True, self);
}

#background_color ⇒ String

Return the name of the background color as a String.

Returns:

  • (String) —

    the background color



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# File 'ext/RMagick/rmimage.cpp', line 1312

VALUE
Image_background_color(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return rm_pixelcolor_to_color_name(image, &image->background_color);
}

#background_color=(color) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1326

VALUE
Image_background_color_eq(VALUE self, VALUE color)
{
    Image *image = rm_check_frozen(self);
    Color_to_PixelColor(&image->background_color, color);
    return color;
}

#base_columns ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1340

VALUE
Image_base_columns(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return INT2FIX(image->magick_columns);
}

#base_filename ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1352

VALUE
Image_base_filename(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    if (*image->magick_filename)
    {
        return rb_str_new2(image->magick_filename);
    }
    else
    {
        return rb_str_new2(image->filename);
    }
}

#base_rows ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1371

VALUE
Image_base_rows(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return INT2FIX(image->magick_rows);
}

#bias ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1384

VALUE
Image_bias(VALUE self)
{
    Image *image;
    double bias = 0.0;

    image = rm_check_destroyed(self);
#if defined(IMAGEMAGICK_7)
    {
        const char *artifact = GetImageArtifact(image, "convolve:bias");
        if (artifact != (const char *) NULL)
        {
            char *q;

            bias = InterpretLocaleValue(artifact, &q);
            if (*q == '%')
            {
                bias *= ((double) QuantumRange + 1.0) / 100.0;
            }
        }
    }
#else
    bias = image->bias;
#endif
    return rb_float_new(bias);
}

#bias=(pct) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1418

VALUE
Image_bias_eq(VALUE self, VALUE pct)
{
    Image *image;
    double bias;

    image = rm_check_frozen(self);
    bias = rm_percentage(pct, 1.0) * QuantumRange;

#if defined(IMAGEMAGICK_7)
    {
        char artifact[21];

        snprintf(artifact, sizeof(artifact), "%.20g", bias);
        if (!SetImageArtifact(image, "convolve:bias", artifact))
        {
            rb_raise(rb_eNoMemError, "not enough memory to continue");
        }
    }
#else
    image->bias = bias;
#endif

    return pct;
}

#bilevel_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1458

VALUE
Image_bilevel_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    double threshold;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    if (argc > 1)
    {
        raise_ChannelType_error(argv[argc-1]);
    }
    if (argc == 0)
    {
        rb_raise(rb_eArgError, "no threshold specified");
    }

    threshold = NUM2DBL(argv[0]);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(BilevelImage) args = { new_image, threshold, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BilevelImage), &args);
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(BilevelImageChannel) args = { new_image, channels, threshold };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BilevelImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#black_point_compensation ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1506

VALUE
Image_black_point_compensation(VALUE self)
{
    Image *image;
    const char *attr;
    VALUE value;

    image = rm_check_destroyed(self);

    attr = rm_get_property(image, BlackPointCompensationKey);
    if (attr && rm_strcasecmp(attr, "true") == 0)
    {
        value = Qtrue;
    }
    else
    {
        value = Qfalse;
    }

    RB_GC_GUARD(value);

    return value;
}

#black_point_compensation=(arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1537

VALUE
Image_black_point_compensation_eq(VALUE self, VALUE arg)
{
    Image *image;
    const char *value;

    image = rm_check_frozen(self);
    rm_set_property(image, BlackPointCompensationKey, NULL);
    value = RTEST(arg) ? "true" : "false";
    rm_set_property(image, BlackPointCompensationKey, value);

    return arg;
}

#black_threshold(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1577

VALUE
Image_black_threshold(int argc, VALUE *argv, VALUE self)
{
    return threshold_image(argc, argv, self, GVL_FUNC(BlackThresholdImage));
}

#blend(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1931

VALUE
Image_blend(int argc, VALUE *argv, VALUE self)
{
    VALUE ovly;
    Image *image, *overlay;
    double src_percent, dst_percent;
    long x_offset = 0L, y_offset = 0L;

    image = rm_check_destroyed(self);

    if (argc < 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 6)", argc);
    }

    ovly = rm_cur_image(argv[0]);
    overlay = rm_check_destroyed(ovly);

    if (argc > 3)
    {
        get_composite_offsets(argc-3, &argv[3], image, overlay, &x_offset, &y_offset);
        // There must be 3 arguments left
        argc = 3;
    }

    switch (argc)
    {
        case 3:
            dst_percent = rm_percentage(argv[2], 1.0) * 100.0;
            src_percent = rm_percentage(argv[1], 1.0) * 100.0;
            break;
        case 2:
            src_percent = rm_percentage(argv[1], 1.0) * 100.0;
            dst_percent = FMAX(100.0 - src_percent, 0);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 6)", argc);
            break;
    }

    RB_GC_GUARD(ovly);

    return special_composite(image, overlay, src_percent, dst_percent,
                             x_offset, y_offset, BlendCompositeOp);

}

#blue_shift(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 1987

VALUE
Image_blue_shift(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double factor = 1.5;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 1:
            factor = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }


    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(BlueShiftImage) args = { image, factor, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlueShiftImage), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#blur_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2034

VALUE
Image_blur_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    ChannelType channels;
    double radius = 0.0, sigma = 1.0;

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    // There can be 0, 1, or 2 remaining arguments.
    switch (argc)
    {
        case 2:
            sigma = NUM2DBL(argv[1]);
        case 1:
            radius = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(BlurImage) args = { image, radius, sigma, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlurImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(BlurImageChannel) args = { image, channels, radius, sigma, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlurImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#blur_image(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2085

VALUE
Image_blur_image(int argc, VALUE *argv, VALUE self)
{
    return effect_image(self, argc, argv, GVL_FUNC(BlurImage));
}

#border(width, height, color) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2172

VALUE
Image_border(VALUE self, VALUE width, VALUE height, VALUE color)
{
    rm_check_destroyed(self);
    return border(False, self, width, height, color);
}

#border!(width, height, color) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2156

VALUE
Image_border_bang(VALUE self, VALUE width, VALUE height, VALUE color)
{
    rm_check_frozen(self);
    return border(True, self, width, height, color);
}

#border_color ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2185

VALUE
Image_border_color(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return rm_pixelcolor_to_color_name(image, &image->border_color);
}

#border_color=(color) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2199

VALUE
Image_border_color_eq(VALUE self, VALUE color)
{
    Image *image = rm_check_frozen(self);
    Color_to_PixelColor(&image->border_color, color);
    return color;
}

#bounding_box ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2213

VALUE
Image_bounding_box(VALUE self)
{
    Image *image;
    RectangleInfo box;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();
    box = GetImageBoundingBox(image, exception);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    return Import_RectangleInfo(&box);
}

#change_geometry(geom_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2347

VALUE
Image_change_geometry(VALUE self, VALUE geom_arg)
{
    Image *image;
    RectangleInfo rect;
    VALUE geom_str;
    char *geometry;
    unsigned int flags;
    VALUE ary;

    image = rm_check_destroyed(self);
    geom_str = rb_String(geom_arg);
    geometry = StringValueCStr(geom_str);

    memset(&rect, 0, sizeof(rect));

    SetGeometry(image, &rect);
    flags = ParseMetaGeometry(geometry, &rect.x, &rect.y, &rect.width, &rect.height);
    if (flags == NoValue)
    {
        rb_raise(rb_eArgError, "invalid geometry string `%s'", geometry);
    }

    ary = rb_ary_new2(3);
    rb_ary_store(ary, 0, ULONG2NUM(rect.width));
    rb_ary_store(ary, 1, ULONG2NUM(rect.height));
    rb_ary_store(ary, 2, self);

    RB_GC_GUARD(geom_str);
    RB_GC_GUARD(ary);

    return rb_yield(ary);
}

#change_geometry!(geom_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2347

VALUE
Image_change_geometry(VALUE self, VALUE geom_arg)
{
    Image *image;
    RectangleInfo rect;
    VALUE geom_str;
    char *geometry;
    unsigned int flags;
    VALUE ary;

    image = rm_check_destroyed(self);
    geom_str = rb_String(geom_arg);
    geometry = StringValueCStr(geom_str);

    memset(&rect, 0, sizeof(rect));

    SetGeometry(image, &rect);
    flags = ParseMetaGeometry(geometry, &rect.x, &rect.y, &rect.width, &rect.height);
    if (flags == NoValue)
    {
        rb_raise(rb_eArgError, "invalid geometry string `%s'", geometry);
    }

    ary = rb_ary_new2(3);
    rb_ary_store(ary, 0, ULONG2NUM(rect.width));
    rb_ary_store(ary, 1, ULONG2NUM(rect.height));
    rb_ary_store(ary, 2, self);

    RB_GC_GUARD(geom_str);
    RB_GC_GUARD(ary);

    return rb_yield(ary);
}

#changed? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2387

VALUE
Image_changed_q(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    VALUE okay = IsTaintImage(image) ? Qtrue : Qfalse;
    return okay;
}

#channel(channel_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2403

VALUE
Image_channel(VALUE self, VALUE channel_arg)
{
    Image *image, *new_image;
    ChannelType channel;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    VALUE_TO_ENUM(channel_arg, channel, ChannelType);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SeparateImage) args = { image, channel, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SeparateImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    new_image = rm_clone_image(image);
    GVL_STRUCT_TYPE(SeparateImageChannel) args = { new_image, channel };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SeparateImageChannel), &args);

    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#compare_channel(image, metric, channel = Magick::AllChannels) ⇒ Array #compare_channel(image, metric, channel = Magick::AllChannels) {|opt_args| ... } ⇒ Array #compare_channel(image, metric, *channels) ⇒ Array #compare_channel(image, metric, *channels) {|opt_args| ... } ⇒ Array

Compare one or more channels in two images and returns the specified distortion metric and a comparison image.

Overloads:

  • #compare_channel(image, metric, channel = Magick::AllChannels) ⇒ Array

    Parameters:

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

    • metric (Magick::MetricType) —

      The desired distortion metric.

    • channel (Magick::ChannelType) (defaults to: Magick::AllChannels) —

      a ChannelType arguments.

  • #compare_channel(image, metric, channel = Magick::AllChannels) {|opt_args| ... } ⇒ Array

    When a block is given, compare_channel yields with a block argument you can optionally use to set attributes.

    • options.highlight_color = color
      • Emphasize pixel differences with this color. The default is partially transparent red.
    • options.lowlight_color = color
      • De-emphasize pixel differences with this color. The default is partially transparent white.

    Parameters:

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

    • metric (Magick::MetricType) —

      The desired distortion metric.

    • channel (Magick::ChannelType) (defaults to: Magick::AllChannels) —

      a ChannelType arguments.

    Yields:

    • (opt_args)

    Yield Parameters:

  • #compare_channel(image, metric, *channels) ⇒ Array

    Parameters:

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

    • metric (Magick::MetricType) —

      The desired distortion metric.

    • *channels (Magick::ChannelType) —

      one or more ChannelType arguments.

  • #compare_channel(image, metric, *channels) {|opt_args| ... } ⇒ Array

    When a block is given, compare_channel yields with a block argument you can optionally use to set attributes.

    • options.highlight_color = color
      • Emphasize pixel differences with this color. The default is partially transparent red.
    • options.lowlight_color = color
      • De-emphasize pixel differences with this color. The default is partially transparent white.

    Parameters:

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

    • metric (Magick::MetricType) —

      The desired distortion metric.

    • *channels (Magick::ChannelType) —

      one or more ChannelType arguments.

    Yields:

    • (opt_args)

    Yield Parameters:

Returns:

  • (Array) —

    The first element is a difference image, the second is the value of the computed distortion represented as a Float.



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# File 'ext/RMagick/rmimage.cpp', line 3433

VALUE
Image_compare_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *r_image, *difference_image;
    double distortion;
    VALUE ary, ref;
    MetricType metric_type;
    ChannelType channels;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    if (argc > 2)
    {
        raise_ChannelType_error(argv[argc-1]);
    }
    if (argc != 2)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or more)", argc);
    }

    rm_get_optional_arguments(self);

    ref = rm_cur_image(argv[0]);
    r_image = rm_check_destroyed(ref);

    VALUE_TO_ENUM(argv[1], metric_type, MetricType);

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(CompareImages) args = { image, r_image, metric_type, &distortion, exception };
    difference_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompareImages), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(CompareImageChannels) args = { image, r_image, channels, metric_type, &distortion, exception };
    difference_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompareImageChannels), &args);
#endif
    rm_check_exception(exception, difference_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    ary = rb_ary_new2(2);
    rb_ary_store(ary, 0, rm_image_new(difference_image));
    rb_ary_store(ary, 1, rb_float_new(distortion));

    RB_GC_GUARD(ary);
    RB_GC_GUARD(ref);

    return ary;
}

#channel_depth(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2445

VALUE
Image_channel_depth(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    ChannelType channels;
    size_t channel_depth;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // Ensure all arguments consumed.
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(GetImageDepth) args = { image, exception };
    channel_depth = (size_t)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageDepth), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(GetImageChannelDepth) args = { image, channels, exception };
    channel_depth = (size_t)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageChannelDepth), &args);
#endif
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    return ULONG2NUM(channel_depth);
}

#channel_entropy(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2601

VALUE
Image_channel_entropy(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    ChannelType channels;
    ExceptionInfo *exception;
    double entropy;
    VALUE ary;

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    // Ensure all arguments consumed.
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(GetImageEntropy) args = { image, &entropy, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageEntropy), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(GetImageChannelEntropy) args = { image, channels, &entropy, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageChannelEntropy), &args);
#endif
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    ary = rb_ary_new2(1);
    rb_ary_store(ary, 0, rb_float_new(entropy));

    RB_GC_GUARD(ary);

    return ary;
}

#channel_extrema(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2493

VALUE
Image_channel_extrema(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    ChannelType channels;
    ExceptionInfo *exception;
    size_t min, max;
    VALUE ary;

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    // Ensure all arguments consumed.
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(GetImageExtrema) args = { image, &min, &max, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageExtrema), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(GetImageChannelExtrema) args = { image, channels, &min, &max, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageChannelExtrema), &args);
#endif
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    ary = rb_ary_new2(2);
    rb_ary_store(ary, 0, ULONG2NUM(min));
    rb_ary_store(ary, 1, ULONG2NUM(max));

    RB_GC_GUARD(ary);

    return ary;
}

#channel_mean(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2548

VALUE
Image_channel_mean(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    ChannelType channels;
    ExceptionInfo *exception;
    double mean, stddev;
    VALUE ary;

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    // Ensure all arguments consumed.
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(GetImageMean) args = { image, &mean, &stddev, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageMean), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(GetImageChannelMean) args = { image, channels, &mean, &stddev, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageChannelMean), &args);
#endif
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    ary = rb_ary_new2(2);
    rb_ary_store(ary, 0, rb_float_new(mean));
    rb_ary_store(ary, 1, rb_float_new(stddev));

    RB_GC_GUARD(ary);

    return ary;
}

#charcoal(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2651

VALUE
Image_charcoal(int argc, VALUE *argv, VALUE self)
{
    return effect_image(self, argc, argv, GVL_FUNC(CharcoalImage));
}

#check_destroyed ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2664

VALUE
Image_check_destroyed(VALUE self)
{
    rm_check_destroyed(self);
    return Qnil;
}

#chop(x, y, width, height) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2681

VALUE
Image_chop(VALUE self, VALUE x, VALUE y, VALUE width, VALUE height)
{
    rm_check_destroyed(self);
    return xform_image(False, self, x, y, width, height, GVL_FUNC(ChopImage));
}

#chromaticity ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2694

VALUE
Image_chromaticity(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return ChromaticityInfo_new(&image->chromaticity);
}

#chromaticity=(chroma) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2708

VALUE
Image_chromaticity_eq(VALUE self, VALUE chroma)
{
    Image *image = rm_check_frozen(self);
    Export_ChromaticityInfo(&image->chromaticity, chroma);
    return chroma;
}

#class_type ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13878

VALUE
Image_class_type(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return ClassType_find(image->storage_class);
}

#class_type=(new_class_type) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13892

VALUE
Image_class_type_eq(VALUE self, VALUE new_class_type)
{
    Image *image;
    ClassType class_type;
    QuantizeInfo qinfo;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

    VALUE_TO_ENUM(new_class_type, class_type, ClassType);

    if (class_type == UndefinedClass)
    {
        rb_raise(rb_eArgError, "Invalid class type specified.");
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
#endif

    if (image->storage_class == PseudoClass && class_type == DirectClass)
    {
#if defined(IMAGEMAGICK_7)
        GVL_STRUCT_TYPE(SyncImage) args = { image, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SyncImage), &args);
        CHECK_EXCEPTION();
#else
        GVL_STRUCT_TYPE(SyncImage) args = { image };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SyncImage), &args);
#endif
        magick_free(image->colormap);
        image->colormap = NULL;
    }
    else if (image->storage_class == DirectClass && class_type == PseudoClass)
    {
        GetQuantizeInfo(&qinfo);
        qinfo.number_colors = QuantumRange+1;
#if defined(IMAGEMAGICK_7)
        GVL_STRUCT_TYPE(QuantizeImage) args = { &qinfo, image, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(QuantizeImage), &args);
        CHECK_EXCEPTION();
#else
        GVL_STRUCT_TYPE(QuantizeImage) args = { &qinfo, image };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(QuantizeImage), &args);
#endif
    }

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, class_type, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, class_type };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
#endif
    return new_class_type;
}

#clone ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2723

VALUE
Image_clone(VALUE self)
{
    VALUE clone;

    clone = Image_dup(self);
    if (OBJ_FROZEN(self))
    {
        OBJ_FREEZE(clone);
    }

    RB_GC_GUARD(clone);

    return clone;
}

#clut_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2763

VALUE
Image_clut_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *clut;
    ChannelType channels;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

    // check_destroyed before confirming the arguments
    if (argc >= 1)
    {
        clut = rm_check_destroyed(rm_cur_image(argv[0]));
        channels = extract_channels(&argc, argv);
        if (argc != 1)
        {
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or more)", argc);
        }
    }
    else
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or more)", argc);
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(ClutImage) args = { image, clut, image->interpolate, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ClutImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    END_CHANNEL_MASK(image);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(ClutImageChannel) args = { image, channels, clut };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ClutImageChannel), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(image, RetainOnError);
    rm_check_image_exception(clut, RetainOnError);
#endif
    if (!okay)
    {
        rb_raise(rb_eRuntimeError, "ClutImageChannel failed.");
    }

    return self;
}

#color_fill_to_border(x, y, fill) ⇒ Object

Set all pixels that are neighbors of x,y and are not the border color to the fill color



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# File 'lib/rmagick_internal.rb', line 799

def color_fill_to_border(x, y, fill)
  color_flood_fill(border_color, fill, x, y, Magick::FillToBorderMethod)
end

#color_flood_fill(target_color, fill_color, xv, yv, method) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3070

VALUE
Image_color_flood_fill(VALUE self, VALUE target_color, VALUE fill_color,
                       VALUE xv, VALUE yv, VALUE method)
{
    Image *image, *new_image;
    PixelColor target;
    DrawInfo *draw_info;
    PixelColor fill;
    long x, y;
    int fill_method;
    MagickPixel target_mpp;
    MagickBooleanType invert;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    // The target and fill args can be either a color name or
    // a Magick::Pixel.
    Color_to_PixelColor(&target, target_color);
    Color_to_PixelColor(&fill, fill_color);

    x = NUM2LONG(xv);
    y = NUM2LONG(yv);
    if ((unsigned long)x > image->columns || (unsigned long)y > image->rows)
    {
        rb_raise(rb_eArgError, "target out of range. %lux%lu given, image is %" RMIuSIZE "x%" RMIuSIZE "",
                 x, y, image->columns, image->rows);
    }

    VALUE_TO_ENUM(method, fill_method, PaintMethod);
    if (!(fill_method == FloodfillMethod || fill_method == FillToBorderMethod))
    {
        rb_raise(rb_eArgError, "paint method must be FloodfillMethod or "
                 "FillToBorderMethod (%d given)", fill_method);
    }

    draw_info = CloneDrawInfo(NULL, NULL);
    if (!draw_info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }
    draw_info->fill = fill;

    new_image = rm_clone_image(image);

    rm_init_magickpixel(new_image, &target_mpp);
    if (fill_method == FillToBorderMethod)
    {
        invert = MagickTrue;
        target_mpp.red   = (MagickRealType) image->border_color.red;
        target_mpp.green = (MagickRealType) image->border_color.green;
        target_mpp.blue  = (MagickRealType) image->border_color.blue;
    }
    else
    {
        invert = MagickFalse;
        target_mpp.red   = (MagickRealType) target.red;
        target_mpp.green = (MagickRealType) target.green;
        target_mpp.blue  = (MagickRealType) target.blue;
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, draw_info, &target_mpp, x, y, invert, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);
    DestroyDrawInfo(draw_info);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, DefaultChannels, draw_info, &target_mpp, x, y, invert };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);

    DestroyDrawInfo(draw_info);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#color_floodfill(x, y, fill) ⇒ Object

Set all pixels that have the same color as the pixel at x,y and are neighbors to the fill color



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# File 'lib/rmagick_internal.rb', line 792

def color_floodfill(x, y, fill)
  target = pixel_color(x, y)
  color_flood_fill(target, fill, x, y, Magick::FloodfillMethod)
end

#color_histogram ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 2821

VALUE
Image_color_histogram(VALUE self)
{
    Image *image, *dc_copy = NULL;
    VALUE hash, pixel;
    size_t x, colors;
    ExceptionInfo *exception;
#if defined(IMAGEMAGICK_7)
    PixelInfo *histogram;
#else
    ColorPacket *histogram;
#endif

    image = rm_check_destroyed(self);

    exception = AcquireExceptionInfo();

    // If image not DirectClass make a DirectClass copy.
    if (image->storage_class != DirectClass)
    {
        dc_copy = rm_clone_image(image);
#if defined(IMAGEMAGICK_7)
        GVL_STRUCT_TYPE(SetImageStorageClass) args = { dc_copy, DirectClass, exception };
#else
        GVL_STRUCT_TYPE(SetImageStorageClass) args = { dc_copy, DirectClass };
#endif
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
        image = dc_copy;
    }

    GVL_STRUCT_TYPE(GetImageHistogram) args = { image, &colors, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageHistogram), &args);
    histogram = reinterpret_cast<decltype(histogram)>(ret);

    if (histogram == NULL)
    {
        if (dc_copy)
        {
            DestroyImage(dc_copy);
        }
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }
    if (rm_should_raise_exception(exception, DestroyExceptionRetention))
    {
        RelinquishMagickMemory(histogram);
        if (dc_copy)
        {
            DestroyImage(dc_copy);
        }

        rm_raise_exception(exception);
    }

    hash = rb_hash_new();
    for (x = 0; x < colors; x++)
    {
#if defined(IMAGEMAGICK_7)
        pixel = Pixel_from_PixelColor(&histogram[x]);
#else
        pixel = Pixel_from_PixelColor(&histogram[x].pixel);
#endif
        rb_hash_aset(hash, pixel, ULONG2NUM((unsigned long)histogram[x].count));
    }

    /*
        Christy evidently didn't agree with Bob's memory management.
    */
    RelinquishMagickMemory(histogram);

    if (dc_copy)
    {
        // Do not trace destruction
        DestroyImage(dc_copy);
    }

    RB_GC_GUARD(hash);
    RB_GC_GUARD(pixel);

    return hash;
}

#color_point(x, y, fill) ⇒ Object

Set the color at x,y



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# File 'lib/rmagick_internal.rb', line 784

def color_point(x, y, fill)
  f = copy
  f.pixel_color(x, y, fill)
  f
end

#color_profile ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3020

VALUE
Image_color_profile(VALUE self)
{
    Image *image;
    const StringInfo *profile;

    image = rm_check_destroyed(self);
    profile = GetImageProfile(image, "icc");
    if (!profile)
    {
        return Qnil;
    }

    return rb_str_new((char *)profile->datum, (long)profile->length);

}

#color_profile=(profile) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3047

VALUE
Image_color_profile_eq(VALUE self, VALUE profile)
{
    Image_delete_profile(self, rb_str_new2("ICC"));
    if (profile != Qnil)
    {
        set_profile(self, "ICC", profile);
    }
    return profile;
}

#color_reset!(fill) ⇒ Object

Set all pixels to the fill color. Very similar to Image#erase! Accepts either String or Pixel arguments



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# File 'lib/rmagick_internal.rb', line 805

def color_reset!(fill)
  save = background_color
  # Change the background color _outside_ the begin block
  # so that if this object is frozen the exception will be
  # raised before we have to handle it explicitly.
  self.background_color = fill
  begin
    erase!
  ensure
    self.background_color = save
  end
  self
end

#colorize(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3171

VALUE
Image_colorize(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double red, green, blue, matte;
    char opacity[50];
    PixelColor target;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    if (argc == 4)
    {
        red   = floor(100*NUM2DBL(argv[0])+0.5);
        green = floor(100*NUM2DBL(argv[1])+0.5);
        blue  = floor(100*NUM2DBL(argv[2])+0.5);
        Color_to_PixelColor(&target, argv[3]);
        snprintf(opacity, sizeof(opacity), "%f/%f/%f", red, green, blue);
    }
    else if (argc == 5)
    {
        red   = floor(100*NUM2DBL(argv[0])+0.5);
        green = floor(100*NUM2DBL(argv[1])+0.5);
        blue  = floor(100*NUM2DBL(argv[2])+0.5);
        matte = floor(100*NUM2DBL(argv[3])+0.5);
        Color_to_PixelColor(&target, argv[4]);
        snprintf(opacity, sizeof(opacity), "%f/%f/%f/%f", red, green, blue, matte);
    }
    else
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 4 or 5)", argc);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(ColorizeImage) args = { image, opacity, &target, exception };
#else
    GVL_STRUCT_TYPE(ColorizeImage) args = { image, opacity, target, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ColorizeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#colormap(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3235

VALUE
Image_colormap(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    unsigned long idx;
    PixelColor color, new_color;

    image = rm_check_destroyed(self);

    // We can handle either 1 or 2 arguments. Nothing else.
    if (argc == 0 || argc > 2)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or 2)", argc);
    }

    idx = NUM2ULONG(argv[0]);
    if (idx > QuantumRange)
    {
        rb_raise(rb_eIndexError, "index out of range");
    }

    // If this is a simple "get" operation, ensure the image has a colormap.
    if (argc == 1)
    {
        if (!image->colormap)
        {
            rb_raise(rb_eIndexError, "image does not contain a colormap");
        }
        // Validate the index

        if (idx > image->colors-1)
        {
            rb_raise(rb_eIndexError, "index out of range");
        }
        return rm_pixelcolor_to_color_name(image, &image->colormap[idx]);
    }

    // This is a "set" operation. Things are different.

    rb_check_frozen(self);

    // Replace with new color? The arg can be either a color name or
    // a Magick::Pixel.
    Color_to_PixelColor(&new_color, argv[1]);

    // Handle no colormap or current colormap too small.
    if (!image->colormap || idx > image->colors-1)
    {
        PixelColor black;
        unsigned long i;

        memset(&black, 0, sizeof(black));

        if (!image->colormap)
        {
            image->colormap = (PixelColor *)magick_safe_malloc((idx+1), sizeof(PixelColor));
            image->colors = 0;
        }
        else
        {
            image->colormap = (PixelColor *)magick_safe_realloc(image->colormap, (idx+1), sizeof(PixelColor));
        }

        for (i = image->colors; i < idx; i++)
        {
            image->colormap[i] = black;
        }
        image->colors = idx+1;
    }

    // Save the current color so we can return it. Set the new color.
    color = image->colormap[idx];
    image->colormap[idx] = new_color;

    return rm_pixelcolor_to_color_name(image, &color);
}

#colors ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3317

VALUE
Image_colors(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, colors, ulong, &rm_image_data_type);
}

#colorspace ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3330

VALUE
Image_colorspace(VALUE self)
{
    Image *image;

    image = rm_check_destroyed(self);
    return ColorspaceType_find(image->colorspace);
}

#colorspace=(colorspace) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3346

VALUE
Image_colorspace_eq(VALUE self, VALUE colorspace)
{
    Image *image;
    ColorspaceType new_cs;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);
    VALUE_TO_ENUM(colorspace, new_cs, ColorspaceType);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(TransformImageColorspace) args = { image, new_cs, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransformImageColorspace), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(TransformImageColorspace) args = { image, new_cs };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransformImageColorspace), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    return colorspace;
}

#columns ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3379

VALUE
Image_columns(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, columns, int, &rm_image_data_type);
}

#compare_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3433

VALUE
Image_compare_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *r_image, *difference_image;
    double distortion;
    VALUE ary, ref;
    MetricType metric_type;
    ChannelType channels;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    if (argc > 2)
    {
        raise_ChannelType_error(argv[argc-1]);
    }
    if (argc != 2)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or more)", argc);
    }

    rm_get_optional_arguments(self);

    ref = rm_cur_image(argv[0]);
    r_image = rm_check_destroyed(ref);

    VALUE_TO_ENUM(argv[1], metric_type, MetricType);

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(CompareImages) args = { image, r_image, metric_type, &distortion, exception };
    difference_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompareImages), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(CompareImageChannels) args = { image, r_image, channels, metric_type, &distortion, exception };
    difference_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompareImageChannels), &args);
#endif
    rm_check_exception(exception, difference_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    ary = rb_ary_new2(2);
    rb_ary_store(ary, 0, rm_image_new(difference_image));
    rb_ary_store(ary, 1, rb_float_new(distortion));

    RB_GC_GUARD(ary);
    RB_GC_GUARD(ref);

    return ary;
}

#compose ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3492

VALUE
Image_compose(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return CompositeOperator_find(image->compose);
}

#compose=(compose_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3506

VALUE
Image_compose_eq(VALUE self, VALUE compose_arg)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(compose_arg, image->compose, CompositeOperator);
    return compose_arg;
}

#composite(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3779

VALUE
Image_composite(int argc, VALUE *argv, VALUE self)
{
    return composite(False, argc, argv, self, DefaultChannels);
}

#composite!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3739

VALUE
Image_composite_bang(int argc, VALUE *argv, VALUE self)
{
    return composite(True, argc, argv, self, DefaultChannels);
}

#composite_affine(source, affine_matrix) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3793

VALUE
Image_composite_affine(VALUE self, VALUE source, VALUE affine_matrix)
{
    Image *image, *composite_image, *new_image;
    AffineMatrix affine;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    composite_image = rm_check_destroyed(rm_cur_image(source));

    Export_AffineMatrix(&affine, affine_matrix);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(DrawAffineImage) args = { new_image, composite_image, &affine, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(DrawAffineImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(DrawAffineImage) args = { new_image, composite_image, &affine };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(DrawAffineImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#composite_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 3929

VALUE
Image_composite_channel(int argc, VALUE *argv, VALUE self)
{
    return composite_channel(False, argc, argv, self);
}

#composite_channel!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4004

VALUE
Image_composite_channel_bang(int argc, VALUE *argv, VALUE self)
{
    return composite_channel(True, argc, argv, self);
}

#composite_mathematics(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4052

VALUE
Image_composite_mathematics(int argc, VALUE *argv, VALUE self)
{
    Image *composite_image;
    VALUE args[5];
    signed long x_off = 0L;
    signed long y_off = 0L;
    GravityType gravity = NorthWestGravity;
    char compose_args[200];

    rm_check_destroyed(self);

    switch (argc)
    {
        case 8:
            VALUE_TO_ENUM(argv[5], gravity, GravityType);
            x_off = NUM2LONG(argv[6]);
            y_off = NUM2LONG(argv[7]);
            break;
        case 7:
            x_off = NUM2LONG(argv[5]);
            y_off = NUM2LONG(argv[6]);
            break;
        case 6:
            VALUE_TO_ENUM(argv[5], gravity, GravityType);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (got %d, expected 6 to 8)", argc);
            break;
    }

    composite_image = rm_check_destroyed(rm_cur_image(argv[0]));

    snprintf(compose_args, sizeof(compose_args), "%-.16g,%-.16g,%-.16g,%-.16g", NUM2DBL(argv[1]), NUM2DBL(argv[2]), NUM2DBL(argv[3]), NUM2DBL(argv[4]));
    if (!SetImageArtifact(composite_image, "compose:args", compose_args))
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }

    // Call composite(False, gravity, x_off, y_off, MathematicsCompositeOp, DefaultChannels)
    args[0] = argv[0];
    args[1] = GravityType_find(gravity);
    args[2] = LONG2FIX(x_off);
    args[3] = LONG2FIX(y_off);
    args[4] = CompositeOperator_find(MathematicsCompositeOp);

    return composite(False, 5, args, self, DefaultChannels);
}

#composite_tiled(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4227

VALUE
Image_composite_tiled(int argc, VALUE *argv, VALUE self)
{
    return composite_tiled(False, argc, argv, self);
}

#composite_tiled!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4254

VALUE
Image_composite_tiled_bang(int argc, VALUE *argv, VALUE self)
{
    return composite_tiled(True, argc, argv, self);
}

#compress_colormap! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4294

VALUE
Image_compress_colormap_bang(VALUE self)
{
    Image *image;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(CompressImageColormap) args = { image, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompressImageColormap), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(CompressImageColormap) args = { image };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompressImageColormap), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(image, RetainOnError);
#endif
    if (!okay)
    {
        rb_warning("CompressImageColormap failed (probably DirectClass image)");
    }

    return self;
}

#compression ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4266

VALUE
Image_compression(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return CompressionType_find(image->compression);
}

#compression=(compression) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4279

VALUE
Image_compression_eq(VALUE self, VALUE compression)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(compression, image->compression, CompressionType);
    return compression;
}

#contrast(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4513

VALUE
Image_contrast(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickBooleanType sharpen = MagickFalse;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    if (argc > 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
    }
    else if (argc == 1)
    {
        sharpen = (MagickBooleanType)RTEST(argv[0]);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ContrastImage) args = { new_image, sharpen, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ContrastImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(ContrastImage) args = { new_image, sharpen };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ContrastImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#contrast_stretch_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4638

VALUE
Image_contrast_stretch_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    double black_point, white_point;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    if (argc > 2)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    get_black_white_point(image, argc, argv, &black_point, &white_point);

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(ContrastStretchImage) args = { new_image, black_point, white_point, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ContrastStretchImage), &args);
    END_CHANNEL_MASK(new_image);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(ContrastStretchImageChannel) args = { new_image, channels, black_point, white_point };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ContrastStretchImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#convolve(order_arg, kernel_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4813

VALUE
Image_convolve(VALUE self, VALUE order_arg, VALUE kernel_arg)
{
    Image *image, *new_image;
    size_t order;
    ExceptionInfo *exception;
#if defined(IMAGEMAGICK_7)
    KernelInfo *kernel;
#else
    double *kernel;
    unsigned int x;
#endif

    image = rm_check_destroyed(self);

    if (NUM2INT(order_arg) <= 0)
    {
        rb_raise(rb_eArgError, "order must be non-zero and positive");
    }

    order = NUM2INT(order_arg);
    kernel_arg = rb_Array(kernel_arg);
    rm_check_ary_len(kernel_arg, (long)(order*order));

#if defined(IMAGEMAGICK_7)
    kernel = convolve_create_kernel_info(order, kernel_arg);
#else
    // Convert the kernel array argument to an array of doubles

    kernel = (double *)ALLOC_N(double, order*order);
    for (x = 0; x < (unsigned)(order * order); x++)
    {
        VALUE element = rb_ary_entry(kernel_arg, (long)x);
        if (rm_check_num2dbl(element))
        {
            kernel[x] = NUM2DBL(element);
        }
        else
        {
            xfree((void *)kernel);
            rb_raise(rb_eTypeError, "type mismatch: %s given", rb_class2name(CLASS_OF(element)));
        }
    }
#endif

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(ConvolveImage) args = { image, kernel, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ConvolveImage), &args);
    DestroyKernelInfo(kernel);
#else
    GVL_STRUCT_TYPE(ConvolveImage) args = { image, order, kernel, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ConvolveImage), &args);
    xfree((void *)kernel);
#endif

    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#convolve_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4892

VALUE
Image_convolve_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    VALUE ary;
    size_t order;
    ChannelType channels;
    ExceptionInfo *exception;
#if defined(IMAGEMAGICK_7)
    KernelInfo *kernel;
#else
    double *kernel;
    unsigned int x;
#endif

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    // There are 2 required arguments.
    if (argc > 2)
    {
        raise_ChannelType_error(argv[argc-1]);
    }
    if (argc != 2)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or more)", argc);
    }

    if (NUM2INT(argv[0]) <= 0)
    {
        rb_raise(rb_eArgError, "order must be non-zero and positive");
    }

    order = NUM2INT(argv[0]);
    ary = rb_Array(argv[1]);
    rm_check_ary_len(ary, (long)(order*order));

#if defined(IMAGEMAGICK_7)
    kernel = convolve_create_kernel_info(order, ary);
#else
    kernel = ALLOC_N(double, (long)(order*order));

    // Convert the kernel array argument to an array of doubles
    for (x = 0; x < (unsigned)(order * order); x++)
    {
        VALUE element = rb_ary_entry(ary, (long)x);
        if (rm_check_num2dbl(element))
        {
            kernel[x] = NUM2DBL(element);
        }
        else
        {
            xfree((void *)kernel);
            rb_raise(rb_eTypeError, "type mismatch: %s given", rb_class2name(CLASS_OF(element)));
        }
    }
#endif

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(ConvolveImage) args = { image, kernel, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ConvolveImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
    DestroyKernelInfo(kernel);
#else
    GVL_STRUCT_TYPE(ConvolveImageChannel) args = { image, channels, order, kernel, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ConvolveImageChannel), &args);
    xfree((void *)kernel);
#endif

    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    RB_GC_GUARD(ary);

    return rm_image_new(new_image);
}

#copy ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4981

VALUE
Image_copy(VALUE self)
{
    return rb_funcall(self, rm_ID_dup, 0);
}

#crop(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5036

VALUE
Image_crop(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return cropper(False, argc, argv, self);
}

#crop!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5072

VALUE
Image_crop_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return cropper(True, argc, argv, self);
}

#cur_image ⇒ Object

Used by ImageList methods - see ImageList#cur_image



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# File 'lib/rmagick_internal.rb', line 820

def cur_image
  self
end

#cycle_colormap(amount) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5089

VALUE
Image_cycle_colormap(VALUE self, VALUE amount)
{
    Image *image, *new_image;
    int amt;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    amt = NUM2INT(amount);

    image = rm_check_destroyed(self);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(CycleColormapImage) args = { new_image, amt, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CycleColormapImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(CycleColormapImage) args = { new_image, amt };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CycleColormapImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#decipher(passphrase) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5232

VALUE
Image_decipher(VALUE self, VALUE passphrase)
{
    Image *image, *new_image;
    char *pf;
    ExceptionInfo *exception;
    MagickBooleanType okay;

    image = rm_check_destroyed(self);
    pf = StringValueCStr(passphrase);      // ensure passphrase is a string
    exception = AcquireExceptionInfo();

    new_image = rm_clone_image(image);

    GVL_STRUCT_TYPE(DecipherImage) args = { new_image, pf, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(DecipherImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_exception(exception, new_image, DestroyOnError);
    if (!okay)
    {
        DestroyImage(new_image);
        rb_raise(rb_eRuntimeError, "DecipherImage failed for unknown reason.");
    }

    DestroyExceptionInfo(exception);

    RB_GC_GUARD(passphrase);

    return rm_image_new(new_image);
}

#define(artifact, value) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5299

VALUE
Image_define(VALUE self, VALUE artifact, VALUE value)
{
    Image *image;
    char *key, *val;
    MagickBooleanType status;

    image = rm_check_frozen(self);
    artifact = rb_String(artifact);
    key = StringValueCStr(artifact);

    if (value == Qnil)
    {
        DeleteImageArtifact(image, key);
    }
    else
    {
        value = rb_String(value);
        val = StringValueCStr(value);
        status = SetImageArtifact(image, key, val);
        if (!status)
        {
            rb_raise(rb_eNoMemError, "not enough memory to continue");
        }
    }

    return value;
}

#delay ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5336

VALUE
Image_delay(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, delay, ulong, &rm_image_data_type);
}

#delay=(val) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5349

VALUE
Image_delay_eq(VALUE self, VALUE val)
{
    IMPLEMENT_TYPED_ATTR_WRITER(Image, delay, ulong, &rm_image_data_type);
}

#delete_compose_mask ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5362

VALUE
Image_delete_compose_mask(VALUE self)
{
    Image *image;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SetImageMask) args = { image, CompositePixelMask, NULL, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageMask), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SetImageMask) args = { image, NULL };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageMask), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    return self;
}

#delete_profile(name) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5396

VALUE
Image_delete_profile(VALUE self, VALUE name)
{
    Image *image = rm_check_frozen(self);
    char *profile_name = StringValueCStr(name);

#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(ProfileImage) args = { image, profile_name, NULL, 0, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ProfileImage), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(ProfileImage) args = { image, profile_name, NULL, 0, MagickTrue };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ProfileImage), &args);
#endif
    return self;
}

#density ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5126

VALUE
Image_density(VALUE self)
{
    Image *image;
    char density[128];

    image = rm_check_destroyed(self);

#if defined(IMAGEMAGICK_7)
    snprintf(density, sizeof(density), "%gx%g", image->resolution.x, image->resolution.y);
#else
    snprintf(density, sizeof(density), "%gx%g", image->x_resolution, image->y_resolution);
#endif
    return rb_str_new2(density);
}

#density=(density_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5157

VALUE
Image_density_eq(VALUE self, VALUE density_arg)
{
    Image *image;
    char *density;
    VALUE x_val, y_val;
    int count;
    double x_res, y_res;

    image = rm_check_frozen(self);

    // Get the Class ID for the Geometry class.
    if (!Class_Geometry)
    {
        Class_Geometry = rb_const_get(Module_Magick, rm_ID_Geometry);
    }

    // Geometry object. Width and height attributes are always positive.
    if (CLASS_OF(density_arg) == Class_Geometry)
    {
        x_val = rb_funcall(density_arg, rm_ID_width, 0);
        x_res = NUM2DBL(x_val);
        y_val = rb_funcall(density_arg, rm_ID_height, 0);
        y_res = NUM2DBL(y_val);
        if (x_res == 0.0)
        {
            rb_raise(rb_eArgError, "invalid x resolution: %f", x_res);
        }
#if defined(IMAGEMAGICK_7)
        image->resolution.y = y_res != 0.0 ? y_res : x_res;
        image->resolution.x = x_res;
#else
        image->y_resolution = y_res != 0.0 ? y_res : x_res;
        image->x_resolution = x_res;
#endif
    }

    // Convert the argument to a string
    else
    {
        density = StringValueCStr(density_arg);
        if (!IsGeometry(density))
        {
            rb_raise(rb_eArgError, "invalid density geometry %s", density);
        }

#if defined(IMAGEMAGICK_7)
        count = sscanf(density, "%lfx%lf", &image->resolution.x, &image->resolution.y);
#else
        count = sscanf(density, "%lfx%lf", &image->x_resolution, &image->y_resolution);
#endif
        if (count < 2)
        {
#if defined(IMAGEMAGICK_7)
            image->resolution.y = image->resolution.x;
#else
            image->y_resolution = image->x_resolution;
#endif
        }

    }

    RB_GC_GUARD(x_val);
    RB_GC_GUARD(y_val);

    return density_arg;
}

#depth ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5425

VALUE
Image_depth(VALUE self)
{
    Image *image;
    size_t depth = 0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(GetImageDepth) args = { image, exception };
    depth = (size_t)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageDepth), &args);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    return INT2FIX(depth);
}

#deskew(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5455

VALUE
Image_deskew(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double threshold = 40.0 * QuantumRange / 100.0;
    unsigned long width;
    char auto_crop_width[20];
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 2:
            width = NUM2ULONG(argv[1]);
            memset(auto_crop_width, 0, sizeof(auto_crop_width));
            snprintf(auto_crop_width, sizeof(auto_crop_width), "%lu", width);
            if (!SetImageArtifact(image, "deskew:auto-crop", auto_crop_width))
            {
                rb_raise(rb_eNoMemError, "not enough memory to continue");
            }
        case 1:
            threshold = rm_percentage(argv[0], 1.0) * QuantumRange;
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 2)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(DeskewImage) args = { image, threshold, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(DeskewImage), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#despeckle ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5500

VALUE
Image_despeckle(VALUE self)
{
    Image *image, *new_image;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(DespeckleImage) args = { image, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(DespeckleImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#destroy! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5523

VALUE
Image_destroy_bang(VALUE self)
{
    Image *image;

    rb_check_frozen(self);
    TypedData_Get_Struct(self, Image, &rm_image_data_type, image);
    rm_image_destroy(image);
    DATA_PTR(self) = NULL;
    return self;
}

#destroyed? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5541

VALUE
Image_destroyed_q(VALUE self)
{
    Image *image;

    TypedData_Get_Struct(self, Image, &rm_image_data_type, image);
    return image ? Qfalse : Qtrue;
}

#difference(other) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5568

VALUE
Image_difference(VALUE self, VALUE other)
{
    Image *image;
    Image *image2;
    VALUE mean, nmean, nmax;
#if defined(IMAGEMAGICK_7)
    double distortion;
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    other = rm_cur_image(other);
    image2 = rm_check_destroyed(other);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(GetImageDistortion) args = { image, image2, MeanErrorPerPixelErrorMetric, &distortion, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageDistortion), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(IsImagesEqual) args = { image, image2 };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(IsImagesEqual), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    mean  = rb_float_new(image->error.mean_error_per_pixel);
    nmean = rb_float_new(image->error.normalized_mean_error);
    nmax  = rb_float_new(image->error.normalized_maximum_error);

    RB_GC_GUARD(mean);
    RB_GC_GUARD(nmean);
    RB_GC_GUARD(nmax);

    return rb_ary_new3(3, mean, nmean, nmax);
}

#directory ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5612

VALUE
Image_directory(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, directory, str, &rm_image_data_type);
}

#dispatch(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5731

VALUE
Image_dispatch(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    long x, y;
    unsigned long columns, rows, n, npixels;
    VALUE pixels_ary;
    StorageType stg_type = QuantumPixel;
    char *map;
    size_t mapL;
    MagickBooleanType okay;
    ExceptionInfo *exception;
    volatile union
    {
        Quantum *i;
        double *f;
        void *v;
    } pixels;

    rm_check_destroyed(self);

    if (argc < 5 || argc > 6)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 5 or 6)", argc);
    }

    x       = NUM2LONG(argv[0]);
    y       = NUM2LONG(argv[1]);
    columns = NUM2ULONG(argv[2]);
    rows    = NUM2ULONG(argv[3]);
    map     = rm_str2cstr(&argv[4], &mapL);
    if (argc == 6)
    {
        stg_type = RTEST(argv[5]) ? DoublePixel : QuantumPixel;
    }

    // Compute the size of the pixel array and allocate the memory.
    npixels = pixel_buffer_count(columns, rows, mapL);
    pixels.v = stg_type == QuantumPixel ? (void *) ALLOC_N(Quantum, npixels)
               : (void *) ALLOC_N(double, npixels);

    // Create the Ruby array for the pixels. Return this even if ExportImagePixels fails.
    pixels_ary = rb_ary_new();

    TypedData_Get_Struct(self, Image, &rm_image_data_type, image);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ExportImagePixels) args = { image, x, y, columns, rows, map, stg_type, (void *)pixels.v, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ExportImagePixels), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));

    if (!okay)
    {
        goto exit;
    }

    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    // Convert the pixel data to the appropriate Ruby type
    if (stg_type == QuantumPixel)
    {
        for (n = 0; n < npixels; n++)
        {
            rb_ary_push(pixels_ary, QUANTUM2NUM(pixels.i[n]));
        }
    }
    else
    {
        for (n = 0; n < npixels; n++)
        {
            rb_ary_push(pixels_ary, rb_float_new(pixels.f[n]));
        }
    }

    exit:
    xfree((void *)pixels.v);

    RB_GC_GUARD(pixels_ary);
    RB_GC_GUARD(argv[4]);

    return pixels_ary;
}

#displace(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5634

VALUE
Image_displace(int argc, VALUE *argv, VALUE self)
{
    Image *image, *displacement_map;
    VALUE dmap;
    double x_amplitude = 0.0, y_amplitude = 0.0;
    long x_offset = 0L, y_offset = 0L;

    image = rm_check_destroyed(self);

    if (argc < 2)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 6)", argc);
    }

    dmap = rm_cur_image(argv[0]);
    displacement_map = rm_check_destroyed(dmap);

    if (argc > 3)
    {
        get_composite_offsets(argc-3, &argv[3], image, displacement_map, &x_offset, &y_offset);
        // There must be 3 arguments left
        argc = 3;
    }

    switch (argc)
    {
        case 3:
            y_amplitude = NUM2DBL(argv[2]);
            x_amplitude = NUM2DBL(argv[1]);
            break;
        case 2:
            x_amplitude = NUM2DBL(argv[1]);
            y_amplitude = x_amplitude;
            break;
    }

    RB_GC_GUARD(dmap);

    return special_composite(image, displacement_map, x_amplitude, y_amplitude,
                             x_offset, y_offset, DisplaceCompositeOp);
}

#display ⇒ Object Also known as: __display__ 



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# File 'ext/RMagick/rmimage.cpp', line 5824

VALUE
Image_display(VALUE self)
{
    Image *image;
    Info *info;
    VALUE info_obj;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    if (image->rows == 0 || image->columns == 0)
    {
        rb_raise(rb_eArgError, "invalid image geometry (%" RMIuSIZE "x%" RMIuSIZE ")", image->rows, image->columns);
    }

    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, info);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    DisplayImages(info, image, exception);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    DisplayImages(info, image);
    rm_check_image_exception(image, RetainOnError);
#endif

    RB_GC_GUARD(info_obj);

    return self;
}

#dispose ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5865

VALUE
Image_dispose(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return DisposeType_find(image->dispose);
}

#dispose=(dispose) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5879

VALUE
Image_dispose_eq(VALUE self, VALUE dispose)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(dispose, image->dispose, DisposeType);
    return dispose;
}

#dissolve(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 5911

VALUE
Image_dissolve(int argc, VALUE *argv, VALUE self)
{
    Image *image, *overlay;
    double src_percent, dst_percent = -1.0;
    long x_offset = 0L, y_offset = 0L;
    VALUE composite_image, ovly;

    image = rm_check_destroyed(self);

    if (argc < 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 6)", argc);
    }

    ovly = rm_cur_image(argv[0]);
    overlay = rm_check_destroyed(ovly);

    if (argc > 3)
    {
        get_composite_offsets(argc-3, &argv[3], image, overlay, &x_offset, &y_offset);
        // There must be 3 arguments left
        argc = 3;
    }

    switch (argc)
    {
        case 3:
            dst_percent = rm_percentage(argv[2], 1.0) * 100.0;
        case 2:
            src_percent = rm_percentage(argv[1], 1.0) * 100.0;
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 6)", argc);
            break;
    }

    composite_image =  special_composite(image, overlay, src_percent, dst_percent,
                                         x_offset, y_offset, DissolveCompositeOp);

    RB_GC_GUARD(composite_image);
    RB_GC_GUARD(ovly);

    return composite_image;
}

#distort(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6000

VALUE
Image_distort(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    VALUE pts;
    unsigned long n, npoints;
    DistortMethod distortion_method;
    double *points;
    MagickBooleanType bestfit = MagickFalse;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    rm_get_optional_arguments(self);

    switch (argc)
    {
        case 3:
            bestfit = (MagickBooleanType)RTEST(argv[2]);
        case 2:
            // Ensure pts is an array
            pts = rb_Array(argv[1]);
            VALUE_TO_ENUM(argv[0], distortion_method, DistortMethod);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (expected 2 or 3, got %d)", argc);
            break;
    }

    npoints = RARRAY_LEN(pts);
    points = ALLOC_N(double, npoints);

    for (n = 0; n < npoints; n++)
    {
        VALUE element = rb_ary_entry(pts, n);
        if (rm_check_num2dbl(element))
        {
            points[n] = NUM2DBL(element);
        }
        else
        {
            xfree(points);
            rb_raise(rb_eTypeError, "type mismatch: %s given", rb_class2name(CLASS_OF(element)));
        }
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(DistortImage) args = { image, distortion_method, npoints, points, bestfit, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(DistortImage), &args);
    xfree(points);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    RB_GC_GUARD(pts);

    return rm_image_new(new_image);
}

#distortion_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6076

VALUE
Image_distortion_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *reconstruct;
    ChannelType channels;
    ExceptionInfo *exception;
    MetricType metric;
    VALUE rec;
    double distortion;
#if defined(IMAGEMAGICK_7)
    Image *difference_image;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    if (argc > 2)
    {
        raise_ChannelType_error(argv[argc-1]);
    }
    if (argc < 2)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or more)", argc);
    }

    rec = rm_cur_image(argv[0]);
    reconstruct = rm_check_destroyed(rec);
    VALUE_TO_ENUM(argv[1], metric, MetricType);
    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(CompareImages) args = { image, reconstruct, metric, &distortion, exception };
    difference_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompareImages), &args);
    END_CHANNEL_MASK(image);
    DestroyImage(difference_image);
#else
    GVL_STRUCT_TYPE(GetImageChannelDistortion) args = { image, reconstruct, channels, metric, &distortion, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetImageChannelDistortion), &args);
#endif

    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    RB_GC_GUARD(rec);

    return rb_float_new(distortion);
}

#dup ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6193

VALUE
Image_dup(VALUE self)
{
    VALUE dup;

    rm_check_destroyed(self);
    dup = TypedData_Wrap_Struct(CLASS_OF(self), &rm_image_data_type, NULL);
    RB_GC_GUARD(dup);

    return rb_funcall(dup, rm_ID_initialize_copy, 1, self);
}

#each_iptc_dataset ⇒ Object

Iterate over IPTC record number:dataset tags, yield for each non-nil dataset



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# File 'lib/rmagick_internal.rb', line 878

def each_iptc_dataset
  Magick::IPTC.constants.each do |record|
    rec = Magick::IPTC.const_get(record)
    rec.constants.each do |dataset|
      data_field = get_iptc_dataset(rec.const_get(dataset))
      yield(dataset, data_field) unless data_field.nil?
    end
  end
  nil
end

#each_pixel ⇒ Object

Thanks to Russell Norris!



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# File 'lib/rmagick_internal.rb', line 825

def each_pixel
  get_pixels(0, 0, columns, rows).each_with_index do |p, n|
    yield(p, n % columns, n / columns)
  end
  self
end

#each_profile ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6214

VALUE
Image_each_profile(VALUE self)
{
    Image *image;
    VALUE ary;
    VALUE val = Qnil;
    char *name;
    const StringInfo *profile;

    image = rm_check_destroyed(self);
    ResetImageProfileIterator(image);

    ary = rb_ary_new2(2);

    name = GetNextImageProfile(image);
    while (name)
    {
        rb_ary_store(ary, 0, rb_str_new2(name));

        profile = GetImageProfile(image, name);
        if (!profile)
        {
            rb_ary_store(ary, 1, Qnil);
        }
        else
        {
            rb_ary_store(ary, 1, rb_str_new((char *)profile->datum, (long)profile->length));
        }
        val = rb_yield(ary);
        name = GetNextImageProfile(image);
    }

    RB_GC_GUARD(ary);
    RB_GC_GUARD(val);

    return val;
}

#edge(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6260

VALUE
Image_edge(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double radius = 0.0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 1:
            radius = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }

    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(EdgeImage) args = { image, radius, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EdgeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#emboss(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6349

VALUE
Image_emboss(int argc, VALUE *argv, VALUE self)
{
    return effect_image(self, argc, argv, GVL_FUNC(EmbossImage));
}

#encipher(passphrase) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6364

VALUE
Image_encipher(VALUE self, VALUE passphrase)
{
    Image *image, *new_image;
    char *pf;
    ExceptionInfo *exception;
    MagickBooleanType okay;

    image = rm_check_destroyed(self);
    pf = StringValueCStr(passphrase);      // ensure passphrase is a string
    exception = AcquireExceptionInfo();

    new_image = rm_clone_image(image);

    GVL_STRUCT_TYPE(EncipherImage) args = { new_image, pf, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EncipherImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_exception(exception, new_image, DestroyOnError);
    if (!okay)
    {
        DestroyImage(new_image);
        rb_raise(rb_eRuntimeError, "EncipherImage failed for unknown reason.");
    }

    DestroyExceptionInfo(exception);

    RB_GC_GUARD(passphrase);

    return rm_image_new(new_image);
}

#endian ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6402

VALUE
Image_endian(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return EndianType_find(image->endian);
}

#endian=(type) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6416

VALUE
Image_endian_eq(VALUE self, VALUE type)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(type, image->endian, EndianType);
    return type;
}

#enhance ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6429

VALUE
Image_enhance(VALUE self)
{
    Image *image, *new_image;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(EnhanceImage) args = { image, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EnhanceImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#equalize ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6452

VALUE
Image_equalize(VALUE self)
{
    Image *image, *new_image;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(EqualizeImage) args = { new_image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EqualizeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(EqualizeImage) args = { new_image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EqualizeImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#equalize_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6490

VALUE
Image_equalize_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif
    ChannelType channels;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(EqualizeImage) args = { new_image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EqualizeImage), &args);
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(EqualizeImageChannel) args = { new_image, channels };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EqualizeImageChannel), &args);

    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#erase! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6532

VALUE
Image_erase_bang(VALUE self)
{
    Image *image;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SetImageBackgroundColor) args = { image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageBackgroundColor), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SetImageBackgroundColor) args = { image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageBackgroundColor), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    return self;
}

#excerpt(x, y, width, height) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6627

VALUE
Image_excerpt(VALUE self, VALUE x, VALUE y, VALUE width, VALUE height)
{
    rm_check_destroyed(self);
    return excerpt(False, self, x, y, width, height);
}

#excerpt!(x, y, width, height) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6652

VALUE
Image_excerpt_bang(VALUE self, VALUE x, VALUE y, VALUE width, VALUE height)
{
    rm_check_frozen(self);
    return excerpt(True, self, x, y, width, height);
}

#export_pixels(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6677

VALUE
Image_export_pixels(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    long x_off = 0L, y_off = 0L;
    unsigned long cols, rows;
    long n, npixels;
    MagickBooleanType okay;
    const char *map = "RGB";
    Quantum *pixels;
    VALUE ary;
    ExceptionInfo *exception;


    image = rm_check_destroyed(self);
    cols = image->columns;
    rows = image->rows;

    switch (argc)
    {
        case 5:
            map   = StringValueCStr(argv[4]);
        case 4:
            rows  = NUM2ULONG(argv[3]);
        case 3:
            cols  = NUM2ULONG(argv[2]);
        case 2:
            y_off = NUM2LONG(argv[1]);
        case 1:
            x_off = NUM2LONG(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 5)", argc);
            break;
    }

    if (   x_off < 0 || (unsigned long)x_off > image->columns
           || y_off < 0 || (unsigned long)y_off > image->rows
           || cols == 0 || rows == 0)
    {
        rb_raise(rb_eArgError, "invalid extract geometry");
    }


    npixels = (long)pixel_buffer_count(cols, rows, strlen(map));
    pixels = ALLOC_N(Quantum, npixels);
    if (!pixels)    // app recovered from exception
    {
        return rb_ary_new2(0L);
    }

    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(ExportImagePixels) args = { image, x_off, y_off, cols, rows, map, QuantumPixel, (void *)pixels, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ExportImagePixels), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    if (!okay)
    {
        xfree((void *)pixels);
        CHECK_EXCEPTION();

        // Should never get here...
        rm_magick_error("ExportImagePixels failed with no explanation.");
    }

    DestroyExceptionInfo(exception);

    ary = rb_ary_new2(npixels);
    for (n = 0; n < npixels; n++)
    {
        rb_ary_push(ary, QUANTUM2NUM(pixels[n]));
    }

    xfree((void *)pixels);

    RB_GC_GUARD(ary);

    return ary;
}

#export_pixels_to_str(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6843

VALUE
Image_export_pixels_to_str(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    long x_off = 0L, y_off = 0L;
    unsigned long cols, rows;
    unsigned long npixels;
    size_t sz;
    MagickBooleanType okay;
    const char *map = "RGB";
    StorageType type = CharPixel;
    VALUE string;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    cols = image->columns;
    rows = image->rows;

    switch (argc)
    {
        case 6:
            VALUE_TO_ENUM(argv[5], type, StorageType);
        case 5:
            map   = StringValueCStr(argv[4]);
        case 4:
            rows  = NUM2ULONG(argv[3]);
        case 3:
            cols  = NUM2ULONG(argv[2]);
        case 2:
            y_off = NUM2LONG(argv[1]);
        case 1:
            x_off = NUM2LONG(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 6)", argc);
            break;
    }

    if (   x_off < 0 || (unsigned long)x_off > image->columns
           || y_off < 0 || (unsigned long)y_off > image->rows
           || cols == 0 || rows == 0)
    {
        rb_raise(rb_eArgError, "invalid extract geometry");
    }


    npixels = pixel_buffer_count(cols, rows, strlen(map));
    switch (type)
    {
        case CharPixel:
            sz = sizeof(unsigned char);
            break;
        case ShortPixel:
            sz = sizeof(unsigned short);
            break;
        case DoublePixel:
            sz = sizeof(double);
            break;
        case FloatPixel:
            sz = sizeof(float);
            break;
        case LongPixel:
            sz = sizeof(unsigned long);
            break;
        case QuantumPixel:
            sz = sizeof(Quantum);
            break;
        case UndefinedPixel:
        default:
            rb_raise(rb_eArgError, "undefined storage type");
            break;
    }

    // Allocate a string long enough to hold the exported pixel data.
    // Get a pointer to the buffer.
    if (npixels != 0 && sz > (size_t)LONG_MAX / npixels)
    {
        rb_raise(rb_eRangeError, "pixel buffer dimensions too large");
    }
    string = rb_str_new2("");
    rb_str_resize(string, (long)(sz * npixels));

    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(ExportImagePixels) args = { image, x_off, y_off, cols, rows, map, type, (void *)RSTRING_PTR(string), exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ExportImagePixels), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    if (!okay)
    {
        // Let GC have the string buffer.
        rb_str_resize(string, 0);
        CHECK_EXCEPTION();

        // Should never get here...
        rm_magick_error("ExportImagePixels failed with no explanation.");
    }

    DestroyExceptionInfo(exception);

    RB_GC_GUARD(string);

    return string;
}

#extent(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6772

VALUE
Image_extent(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    RectangleInfo geometry;
    long height, width;
    ExceptionInfo *exception;

    rm_check_destroyed(self);

    if (argc < 2 || argc > 4)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (expected 2 to 4, got %d)", argc);
    }

    geometry.y = geometry.x = 0L;
    switch (argc)
    {
        case 4:
            geometry.y = NUM2LONG(argv[3]);
        case 3:
            geometry.x = NUM2LONG(argv[2]);
        default:
            geometry.height = height = NUM2LONG(argv[1]);
            geometry.width = width = NUM2LONG(argv[0]);
            break;
    }

    // Use the signed versions of these two values to test for < 0
    if (height <= 0L || width <= 0L)
    {
        if (geometry.x == 0 && geometry.y == 0)
        {
            rb_raise(rb_eArgError, "invalid extent geometry %ldx%ld", width, height);
        }
        else
        {
            rb_raise(rb_eArgError, "invalid extent geometry %ldx%ld+%" RMIdSIZE "+%" RMIdSIZE "",
                     width, height, geometry.x, geometry.y);
        }
    }


    TypedData_Get_Struct(self, Image, &rm_image_data_type, image);
    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(ExtentImage) args = { image, &geometry, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ExtentImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#extract_info ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6954

VALUE
Image_extract_info(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return Import_RectangleInfo(&image->extract_info);
}

#extract_info=(rect) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6968

VALUE
Image_extract_info_eq(VALUE self, VALUE rect)
{
    Image *image = rm_check_frozen(self);
    Export_RectangleInfo(&image->extract_info, rect);
    return rect;
}

#filename ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6982

VALUE
Image_filename(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, filename, str, &rm_image_data_type);
}

#filesize ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 6994

VALUE Image_filesize(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return INT2FIX(GetBlobSize(image));
}

#filter ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7006

VALUE
Image_filter(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return FilterType_find(image->filter);
}

#filter=(filter) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7020

VALUE
Image_filter_eq(VALUE self, VALUE filter)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(filter, image->filter, FilterType);
    return filter;
}

#find_similar_region(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7045

VALUE
Image_find_similar_region(int argc, VALUE *argv, VALUE self)
{
    Image *image, *target;
    VALUE region, targ;
    ssize_t x = 0L, y = 0L;
    ExceptionInfo *exception;
    MagickBooleanType okay;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 3:
            y = NUM2LONG(argv[2]);
        case 2:
            x = NUM2LONG(argv[1]);
        case 1:
            targ = rm_cur_image(argv[0]);
            target = rm_check_destroyed(targ);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 to 3)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(IsEquivalentImage) args = { image, target, &x, &y, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(IsEquivalentImage), &args);
#else
    GVL_STRUCT_TYPE(IsImageSimilar) args = { image, target, &x, &y, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(IsImageSimilar), &args);
#endif
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);

    if (!okay)
    {
        return Qnil;
    }

    region = rb_ary_new2(2);
    rb_ary_store(region, 0L, LONG2NUM(x));
    rb_ary_store(region, 1L, LONG2NUM(y));

    RB_GC_GUARD(region);
    RB_GC_GUARD(targ);

    return region;
}

#flip ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7150

VALUE
Image_flip(VALUE self)
{
    rm_check_destroyed(self);
    return flipflop(False, self, GVL_FUNC(FlipImage));
}

#flip! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7167

VALUE
Image_flip_bang(VALUE self)
{
    rm_check_frozen(self);
    return flipflop(True, self, GVL_FUNC(FlipImage));
}

#flop ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7183

VALUE
Image_flop(VALUE self)
{
    rm_check_destroyed(self);
    return flipflop(False, self, GVL_FUNC(FlopImage));
}

#flop! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7200

VALUE
Image_flop_bang(VALUE self)
{
    rm_check_frozen(self);
    return flipflop(True, self, GVL_FUNC(FlopImage));
}

#format ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7213

VALUE
Image_format(VALUE self)
{
    Image *image;
    const MagickInfo *magick_info;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    if (*image->magick)
    {
        // Deliberately ignore the exception info!
        exception = AcquireExceptionInfo();
        magick_info = GetMagickInfo(image->magick, exception);
        DestroyExceptionInfo(exception);
        return magick_info ? rb_str_new2(magick_info->name) : Qnil;
    }

    return Qnil;
}

#format=(magick) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7241

VALUE
Image_format_eq(VALUE self, VALUE magick)
{
    Image *image;
    const MagickInfo *m;
    char *mgk;
    ExceptionInfo *exception;

    image = rm_check_frozen(self);

    mgk = StringValueCStr(magick);

    exception = AcquireExceptionInfo();
    m = GetMagickInfo(mgk, exception);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    if (!m)
    {
        rb_raise(rb_eArgError, "unknown format: %s", mgk);
    }


    strlcpy(image->magick, m->name, sizeof(image->magick));
    return magick;
}

#frame(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7283

VALUE
Image_frame(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    FrameInfo frame_info;

    image = rm_check_destroyed(self);

    frame_info.width = image->columns + 50;
    frame_info.height = image->rows + 50;
    frame_info.x = 25;
    frame_info.y = 25;
    frame_info.inner_bevel = 6;
    frame_info.outer_bevel = 6;

    switch (argc)
    {
        case 7:
            Color_to_PixelColor(&image->matte_color, argv[6]);
        case 6:
            frame_info.outer_bevel = NUM2LONG(argv[5]);
        case 5:
            frame_info.inner_bevel = NUM2LONG(argv[4]);
        case 4:
            frame_info.y = NUM2LONG(argv[3]);
        case 3:
            frame_info.x = NUM2LONG(argv[2]);
        case 2:
            frame_info.height = image->rows + 2*NUM2LONG(argv[1]);
        case 1:
            frame_info.width = image->columns + 2*NUM2LONG(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 7)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(FrameImage) args = { image, &frame_info, image->compose, exception };
#else
    GVL_STRUCT_TYPE(FrameImage) args = { image, &frame_info, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FrameImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#function_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7405

VALUE
Image_function_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickFunction function;
    unsigned long n, nparms;
    double *parms;
    ChannelType channels;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // The number of parameters depends on the function.
    if (argc == 0)
    {
        rb_raise(rb_eArgError, "no function specified");
    }

    VALUE_TO_ENUM(argv[0], function, MagickFunction);
    argc -= 1;
    argv += 1;

    switch (function)
    {
        case PolynomialFunction:
            if (argc == 0)
            {
                rb_raise(rb_eArgError, "PolynomialFunction requires at least one argument.");
            }
            break;
        case SinusoidFunction:
        case ArcsinFunction:
        case ArctanFunction:
           if (argc < 1 || argc > 4)
           {
               rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 to 4)", argc);
           }
           break;
        default:
            rb_raise(rb_eArgError, "undefined function");
            break;
    }

    nparms = argc;
    parms = ALLOC_N(double, nparms);

    for (n = 0; n < nparms; n++)
    {
        VALUE element = argv[n];
        if (rm_check_num2dbl(element))
        {
            parms[n] = NUM2DBL(element);
        }
        else
        {
            xfree(parms);
            rb_raise(rb_eTypeError, "type mismatch: %s given", rb_class2name(CLASS_OF(element)));
        }
    }

    exception = AcquireExceptionInfo();
    new_image = rm_clone_image(image);
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(FunctionImage) args = { new_image, function, nparms, parms, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FunctionImage), &args);
    END_CHANNEL_MASK(new_image);
#else
    GVL_STRUCT_TYPE(FunctionImageChannel) args = { new_image, channels, function, nparms, parms, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FunctionImageChannel), &args);
#endif
    xfree(parms);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#fuzz ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7493

VALUE
Image_fuzz(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, fuzz, dbl, &rm_image_data_type);
}

#fuzz=(fuzz) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7508

VALUE
Image_fuzz_eq(VALUE self, VALUE fuzz)
{
    Image *image = rm_check_frozen(self);
    image->fuzz = rm_fuzz_to_dbl(fuzz);
    return fuzz;
}

#fx(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7530

VALUE
Image_fx(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    char *expression;
    ChannelType channels;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // There must be exactly 1 remaining argument.
    if (argc == 0)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (0 for 1 or more)");
    }
    else if (argc > 1)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    expression = StringValueCStr(argv[0]);

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(FxImage) args = { image, expression, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FxImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(FxImageChannel) args = { image, channels, expression, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FxImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#gamma ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7575

VALUE
Image_gamma(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, gamma, dbl, &rm_image_data_type);
}

#gamma=(val) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7587

VALUE
Image_gamma_eq(VALUE self, VALUE val)
{
    IMPLEMENT_TYPED_ATTR_WRITER(Image, gamma, dbl, &rm_image_data_type);
}

#gamma_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7609

VALUE
Image_gamma_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    double gamma;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // There must be exactly one remaining argument.
    if (argc == 0)
    {
        rb_raise(rb_eArgError, "missing gamma argument");
    }
    else if (argc > 1)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    gamma = NUM2DBL(argv[0]);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(GammaImage) args = { new_image, gamma, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImage), &args);
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(GammaImageChannel) args = { new_image, channels, gamma };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#gamma_correct(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7659

VALUE
Image_gamma_correct(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double red_gamma, green_gamma, blue_gamma;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 1:
            red_gamma   = NUM2DBL(argv[0]);
            green_gamma = blue_gamma = red_gamma;
            break;
        case 2:
            red_gamma   = NUM2DBL(argv[0]);
            green_gamma = NUM2DBL(argv[1]);
            blue_gamma  = green_gamma;
            break;
        case 3:
        case 4:
            red_gamma     = NUM2DBL(argv[0]);
            green_gamma   = NUM2DBL(argv[1]);
            blue_gamma    = NUM2DBL(argv[2]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 to 3)", argc);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
#endif

    if ((red_gamma == green_gamma) && (green_gamma == blue_gamma))
    {
#if defined(IMAGEMAGICK_7)
        BEGIN_CHANNEL_MASK(new_image, (ChannelType) (RedChannel | GreenChannel | BlueChannel));
        GVL_STRUCT_TYPE(GammaImage) args = { new_image, red_gamma, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImage), &args);
        END_CHANNEL_MASK(new_image);
#else
        GVL_STRUCT_TYPE(GammaImageChannel) args = { new_image, (ChannelType) (RedChannel | GreenChannel | BlueChannel), red_gamma };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImageChannel), &args);
#endif
    }
    else
    {
#if defined(IMAGEMAGICK_7)
        BEGIN_CHANNEL_MASK(new_image, RedChannel);
        GVL_STRUCT_TYPE(GammaImage) args1 = { new_image, red_gamma, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImage), &args1);
        END_CHANNEL_MASK(new_image);

        BEGIN_CHANNEL_MASK(new_image, GreenChannel);
        GVL_STRUCT_TYPE(GammaImage) args2 = { new_image, green_gamma, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImage), &args2);
        END_CHANNEL_MASK(new_image);

        BEGIN_CHANNEL_MASK(new_image, BlueChannel);
        GVL_STRUCT_TYPE(GammaImage) args3 = { new_image, blue_gamma, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImage), &args3);
        END_CHANNEL_MASK(new_image);
#else
        GVL_STRUCT_TYPE(GammaImageChannel) args1 = { new_image, RedChannel, red_gamma };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImageChannel), &args1);

        GVL_STRUCT_TYPE(GammaImageChannel) args2 = { new_image, GreenChannel, green_gamma };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImageChannel), &args2);

        GVL_STRUCT_TYPE(GammaImageChannel) args3 = { new_image, BlueChannel, blue_gamma };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GammaImageChannel), &args3);
#endif
    }

#if defined(IMAGEMAGICK_7)
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#gaussian_blur(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7757

VALUE
Image_gaussian_blur(int argc, VALUE *argv, VALUE self)
{
    return effect_image(self, argc, argv, GVL_FUNC(GaussianBlurImage));
}

#gaussian_blur_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7779

VALUE
Image_gaussian_blur_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    ExceptionInfo *exception;
    double radius = 0.0, sigma = 1.0;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // There can be 0, 1, or 2 remaining arguments.
    switch (argc)
    {
        case 2:
            sigma = NUM2DBL(argv[1]);
            /* Fall thru */
        case 1:
            radius = NUM2DBL(argv[0]);
            /* Fall thru */
        case 0:
            break;
        default:
            raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(GaussianBlurImage) args = { image, radius, sigma, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GaussianBlurImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
    rm_check_exception(exception, new_image, DestroyOnError);
#else
    GVL_STRUCT_TYPE(GaussianBlurImageChannel) args = { image, channels, radius, sigma, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GaussianBlurImageChannel), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
#endif

    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#geometry ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7831

VALUE
Image_geometry(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, geometry, str, &rm_image_data_type);
}

#geometry=(geometry) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7845

VALUE
Image_geometry_eq(VALUE self, VALUE geometry)
{
    Image *image;
    VALUE geom_str;
    char *geom;

    image = rm_check_frozen(self);

    if (geometry == Qnil)
    {
        magick_free(image->geometry);
        image->geometry = NULL;
        return self;
    }


    geom_str = rb_String(geometry);
    geom = StringValueCStr(geom_str);
    if (!IsGeometry(geom))
    {
        rb_raise(rb_eTypeError, "invalid geometry: %s", geom);
    }
    magick_clone_string(&image->geometry, geom);

    RB_GC_GUARD(geom_str);

    return geometry;
}

#get_exif_by_entry(*entry) ⇒ Object

Retrieve EXIF data by entry or all. If one or more entry names specified, return the values associated with the entries. If no entries specified, return all entries and values. The return value is an array of [name,value] arrays.



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# File 'lib/rmagick_internal.rb', line 836

def get_exif_by_entry(*entry)
  ary = []
  if entry.empty?
    exif_data = self['EXIF:*']
    exif_data&.split("\n")&.each { |exif| ary.push(exif.split('=')) }
  else
    get_exif_by_entry # ensure properties is populated with exif data
    entry.each do |name|
      rval = self["EXIF:#{name}"]
      ary.push([name, rval])
    end
  end
  ary
end

#get_exif_by_number(*tag) ⇒ Object

Retrieve EXIF data by tag number or all tag/value pairs. The return value is a hash.



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# File 'lib/rmagick_internal.rb', line 852

def get_exif_by_number(*tag)
  hash = {}
  if tag.empty?
    exif_data = self['EXIF:!']
    exif_data&.split("\n")&.each do |exif|
      tag, value = exif.split('=')
      tag = tag[1, 4].hex
      hash[tag] = value
    end
  else
    get_exif_by_number # ensure properties is populated with exif data
    tag.each do |num|
      rval = self[sprintf('#%04X', num.to_i)]
      hash[num] = rval == 'unknown' ? nil : rval
    end
  end
  hash
end

#get_iptc_dataset(ds) ⇒ Object

Retrieve IPTC information by record number:dataset tag constant defined in Magick::IPTC, above.



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# File 'lib/rmagick_internal.rb', line 873

def get_iptc_dataset(ds)
  self['IPTC:' + ds]
end

#get_pixels(x_arg, y_arg, cols_arg, rows_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 7887

VALUE
Image_get_pixels(VALUE self, VALUE x_arg, VALUE y_arg, VALUE cols_arg, VALUE rows_arg)
{
    Image *image;
    ExceptionInfo *exception;
    long x, y;
    unsigned long columns, rows;
    long size, n;
    VALUE pixel_ary;
#if defined(IMAGEMAGICK_7)
    const Quantum *pixels;
#else
    const PixelPacket *pixels;
    const IndexPacket *indexes;
#endif

    image = rm_check_destroyed(self);
    x       = NUM2LONG(x_arg);
    y       = NUM2LONG(y_arg);
    columns = NUM2ULONG(cols_arg);
    rows    = NUM2ULONG(rows_arg);

    if ((x+columns) > image->columns || (y+rows) > image->rows)
    {
        rb_raise(rb_eRangeError, "geometry (%lux%lu%+ld%+ld) exceeds image bounds",
                 columns, rows, x, y);
    }

    // Cast AcquireImagePixels to get rid of the const qualifier. We're not going
    // to change the pixels but I don't want to make "pixels" const.
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(GetVirtualPixels) args = { image, x, y, columns, rows, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetVirtualPixels), &args);
    pixels = reinterpret_cast<decltype(pixels)>(ret);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    // If the function failed, return a 0-length array.
    if (!pixels)
    {
        return rb_ary_new();
    }

    // Allocate an array big enough to contain the PixelPackets.
    size = (long)(columns * rows);
    pixel_ary = rb_ary_new2(size);

#if defined(IMAGEMAGICK_6)
    indexes = GetVirtualIndexQueue(image);
#endif

    // Convert the PixelPackets to Magick::Pixel objects
    for (n = 0; n < size; n++)
    {
#if defined(IMAGEMAGICK_7)
        PixelPacket color;
        memset(&color, 0, sizeof(color));
        color.red   = GetPixelRed(image, pixels);
        color.green = GetPixelGreen(image, pixels);
        color.blue  = GetPixelBlue(image, pixels);
        color.alpha = GetPixelAlpha(image, pixels);
        color.black = GetPixelBlack(image, pixels);
        rb_ary_store(pixel_ary, n, Pixel_from_PixelPacket(&color));

        pixels += GetPixelChannels(image);
#else
        MagickPixel mpp;
        mpp.red = GetPixelRed(pixels);
        mpp.green = GetPixelGreen(pixels);
        mpp.blue = GetPixelBlue(pixels);
        mpp.opacity = GetPixelOpacity(pixels);
        if (indexes)
        {
            mpp.index = GetPixelIndex(indexes + n);
        }
        rb_ary_store(pixel_ary, n, Pixel_from_MagickPixel(&mpp));
        pixels++;
#endif
    }

    return pixel_ary;
}

#gravity ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15091

VALUE Image_gravity(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return GravityType_find(image->gravity);
}

#gravity=(gravity) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15104

VALUE Image_gravity_eq(VALUE self, VALUE gravity)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(gravity, image->gravity, GravityType);
    return gravity;
}

#gray? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8035

VALUE
Image_gray_q(VALUE self)
{
    return has_attribute(self, Image_is_gray_colorspace_type);
}

#grey? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8035

VALUE
Image_gray_q(VALUE self)
{
    return has_attribute(self, Image_is_gray_colorspace_type);
}

#histogram? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8047

VALUE
Image_histogram_q(VALUE self)
{
    return has_attribute(self, IsHistogramImage);
}

#image_type ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15119

VALUE Image_image_type(VALUE self)
{
    Image *image;
    ImageType type;
#if defined(IMAGEMAGICK_6)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
#if defined(IMAGEMAGICK_7)
    type = GetImageType(image);
#else
    exception = AcquireExceptionInfo();
    type = GetImageType(image, exception);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);
#endif

    return ImageType_find(type);
}

#image_type=(image_type) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15148

VALUE Image_image_type_eq(VALUE self, VALUE image_type)
{
    Image *image;
    ImageType type;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);
    VALUE_TO_ENUM(image_type, type, ImageType);
#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    SetImageType(image, type, exception);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    SetImageType(image, type);
#endif
    return image_type;
}

#implode(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8062

VALUE
Image_implode(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double amount = 0.50;
    ExceptionInfo *exception;

    switch (argc)
    {
        case 1:
            amount = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
    }

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(ImplodeImage) args = { image, amount, image->interpolate, exception };
#else
    GVL_STRUCT_TYPE(ImplodeImage) args = { image, amount, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ImplodeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#import_pixels(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8112

VALUE
Image_import_pixels(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    long x_off, y_off;
    long cols, rows;
    size_t n, npixels;
    size_t buffer_l;
    char *map;
    VALUE pixel_arg, pixel_ary;
    StorageType stg_type = CharPixel;
    size_t type_sz, map_l;
    Quantum *pixels = NULL;
    double *fpixels = NULL;
    void *buffer;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

    switch (argc)
    {
        case 7:
            VALUE_TO_ENUM(argv[6], stg_type, StorageType);
        case 6:
            x_off = NUM2LONG(argv[0]);
            y_off = NUM2LONG(argv[1]);
            cols = NUM2LONG(argv[2]);
            rows = NUM2LONG(argv[3]);
            map = StringValueCStr(argv[4]);
            pixel_arg = argv[5];
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 6 or 7)", argc);
            break;
    }

    if (x_off < 0 || y_off < 0 || cols <= 0 || rows <= 0)
    {
        rb_raise(rb_eArgError, "invalid import geometry");
    }

    map_l = strlen(map);
    if (map_l == 0)
    {
        rb_raise(rb_eArgError, "map must not be empty");
    }
    npixels = pixel_buffer_count((size_t)cols, (size_t)rows, map_l);

    // Assume that any object that responds to :to_str is a string buffer containing
    // binary pixel data.
    if (rb_respond_to(pixel_arg, rb_intern("to_str")))
    {
        buffer = (void *)rm_str2cstr(&pixel_arg, &buffer_l);
        switch (stg_type)
        {
            case CharPixel:
                type_sz = 1;
                break;
            case ShortPixel:
                type_sz = sizeof(unsigned short);
                break;
            case LongPixel:
                type_sz = sizeof(unsigned long);
                break;
            case DoublePixel:
                type_sz = sizeof(double);
                break;
            case FloatPixel:
                type_sz = sizeof(float);
                break;
            case QuantumPixel:
                type_sz = sizeof(Quantum);
                break;
            default:
                rb_raise(rb_eArgError, "unsupported storage type %s", StorageType_name(stg_type));
                break;
        }

        if (buffer_l % type_sz != 0)
        {
            rb_raise(rb_eArgError, "pixel buffer must be an exact multiple of the storage type size");
        }
        if ((buffer_l / type_sz) % map_l != 0)
        {
            rb_raise(rb_eArgError, "pixel buffer must contain an exact multiple of the map length");
        }
        if (buffer_l / type_sz < npixels)
        {
            rb_raise(rb_eArgError, "pixel buffer too small (need %" RMIuSIZE " channel values, got %" RMIuSIZE ")",
                     npixels, buffer_l/type_sz);
        }
    }
    // Otherwise convert the argument to an array and convert the array elements
    // to binary pixel data.
    else
    {
        // rb_Array converts an object that is not an array to an array if possible,
        // and raises TypeError if it can't. It usually is possible.
        pixel_ary = rb_Array(pixel_arg);

        if (RARRAY_LEN(pixel_ary) % map_l != 0)
        {
            rb_raise(rb_eArgError, "pixel array must contain an exact multiple of the map length");
        }
        if ((size_t)RARRAY_LEN(pixel_ary) < npixels)
        {
            rb_raise(rb_eArgError, "pixel array too small (need %" RMIuSIZE " elements, got %ld)",
                     npixels, RARRAY_LEN(pixel_ary));
        }

        if (stg_type == DoublePixel || stg_type == FloatPixel)
        {
            fpixels = ALLOC_N(double, npixels);
            for (n = 0; n < npixels; n++)
            {
                VALUE element = rb_ary_entry(pixel_ary, n);
                if (rm_check_num2dbl(element))
                {
                    fpixels[n] = NUM2DBL(element);
                }
                else
                {
                    xfree(fpixels);
                    rb_raise(rb_eTypeError, "type mismatch: %s given", rb_class2name(CLASS_OF(element)));
                }
            }
            buffer = (void *) fpixels;
            stg_type = DoublePixel;
        }
        else
        {
            pixels = ALLOC_N(Quantum, npixels);
            for (n = 0; n < npixels; n++)
            {
                VALUE element = rb_ary_entry(pixel_ary, n);
                if (rm_check_num2dbl(element))
                {
                    pixels[n] = NUM2DBL(element);
                }
                else
                {
                    xfree(pixels);
                    rb_raise(rb_eTypeError, "type mismatch: %s given", rb_class2name(CLASS_OF(element)));
                }
            }
            buffer = (void *) pixels;
            stg_type = QuantumPixel;
        }
    }


#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ImportImagePixels) args = { image, x_off, y_off, (size_t)cols, (size_t)rows, map, stg_type, buffer, exception };
#else
    GVL_STRUCT_TYPE(ImportImagePixels) args = { image, x_off, y_off, (size_t)cols, (size_t)rows, map, stg_type, buffer };
#endif
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ImportImagePixels), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));

    // Free pixel array before checking for errors.
    if (pixels)
    {
        xfree((void *)pixels);
    }
    if (fpixels)
    {
        xfree((void *)fpixels);
    }

    if (!okay)
    {
#if defined(IMAGEMAGICK_7)
        CHECK_EXCEPTION();
        DestroyExceptionInfo(exception);
#else
        rm_check_image_exception(image, RetainOnError);
#endif
        // Shouldn't get here...
        rm_magick_error("ImportImagePixels failed with no explanation.");
    }
#if defined(IMAGEMAGICK_7)
    DestroyExceptionInfo(exception);
#endif

    RB_GC_GUARD(pixel_arg);
    RB_GC_GUARD(pixel_ary);

    return self;
}

#initialize_copy(orig) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4996

VALUE
Image_init_copy(VALUE copy, VALUE orig)
{
    Image *image, *new_image;

    image = rm_check_destroyed(orig);
    new_image = rm_clone_image(image);
    UPDATE_DATA_PTR(copy, new_image);

    return copy;
}

#inspect ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8454

VALUE
Image_inspect(VALUE self)
{
    Image *image;
    char buffer[MaxTextExtent];          // image description buffer

    TypedData_Get_Struct(self, Image, &rm_image_data_type, image);
    if (!image)
    {
        return rb_str_new2("#<Magick::Image: (destroyed)>");
    }
    build_inspect_string(image, buffer, sizeof(buffer));
    return rb_str_new2(buffer);
}

#interlace ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8480

VALUE
Image_interlace(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return InterlaceType_find(image->interlace);
}

#interlace=(interlace) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8494

VALUE
Image_interlace_eq(VALUE self, VALUE interlace)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(interlace, image->interlace, InterlaceType);
    return interlace;
}

#iptc_profile ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8508

VALUE
Image_iptc_profile(VALUE self)
{
    Image *image;
    const StringInfo *profile;

    image = rm_check_destroyed(self);
    profile = GetImageProfile(image, "iptc");
    if (!profile)
    {
        return Qnil;
    }

    return rb_str_new((char *)profile->datum, (long)profile->length);

}

#iptc_profile=(profile) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8533

VALUE
Image_iptc_profile_eq(VALUE self, VALUE profile)
{
    Image_delete_profile(self, rb_str_new2("iptc"));
    if (profile != Qnil)
    {
        set_profile(self, "iptc", profile);
    }
    return profile;
}

#iterations ⇒ Object

These are undocumented methods. The writer is called only by Image#iterations=. The reader is only used by the unit tests!



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# File 'ext/RMagick/rmimage.cpp', line 8550

VALUE
Image_iterations(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, iterations, int, &rm_image_data_type);
}

#iterations=(val) ⇒ Object

do not document! Only used by Image#iterations=



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# File 'ext/RMagick/rmimage.cpp', line 8555

VALUE
Image_iterations_eq(VALUE self, VALUE val)
{
    IMPLEMENT_TYPED_ATTR_WRITER(Image, iterations, int, &rm_image_data_type);
}

#level(black_point = 0.0, white_point = nil, gamma = nil) ⇒ Object

(Thanks to Al Evans for the suggestion.)



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# File 'lib/rmagick_internal.rb', line 902

def level(black_point = 0.0, white_point = nil, gamma = nil)
  black_point = Float(black_point)

  white_point ||= Magick::QuantumRange - black_point
  white_point = Float(white_point)

  gamma_arg = gamma
  gamma ||= 1.0
  gamma = Float(gamma)

  if gamma.abs > 10.0 || white_point.abs <= 10.0 || white_point.abs < gamma.abs
    gamma, white_point = white_point, gamma
    white_point = Magick::QuantumRange - black_point unless gamma_arg
  end

  level2(black_point, white_point, gamma)
end

#level2(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8571

VALUE
Image_level2(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double black_point = 0.0, gamma_val = 1.0, white_point = (double)QuantumRange;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#else
    char level[50];
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 0:             // take all the defaults
            break;
        case 1:
            black_point = NUM2DBL(argv[0]);
            white_point = QuantumRange - black_point;
            break;
        case 2:
            black_point = NUM2DBL(argv[0]);
            white_point = NUM2DBL(argv[1]);
            break;
        case 3:
            black_point = NUM2DBL(argv[0]);
            white_point = NUM2DBL(argv[1]);
            gamma_val   = NUM2DBL(argv[2]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 3)", argc);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(LevelImage) args = { new_image, black_point, white_point, gamma_val, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    snprintf(level, sizeof(level), "%gx%g+%g", black_point, white_point, gamma_val);
    GVL_STRUCT_TYPE(LevelImage) args = { new_image, level };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#level_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8635

VALUE
Image_level_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double black_point = 0.0, gamma_val = 1.0, white_point = (double)QuantumRange;
    ChannelType channel;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 1:             // take all the defaults
            break;
        case 2:
            black_point = NUM2DBL(argv[1]);
            white_point = QuantumRange - black_point;
            break;
        case 3:
            black_point = NUM2DBL(argv[1]);
            white_point = NUM2DBL(argv[2]);
            break;
        case 4:
            black_point = NUM2DBL(argv[1]);
            white_point = NUM2DBL(argv[2]);
            gamma_val   = NUM2DBL(argv[3]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 to 4)", argc);
            break;
    }

    VALUE_TO_ENUM(argv[0], channel, ChannelType);

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channel);
    GVL_STRUCT_TYPE(LevelImage) args = { new_image, black_point, white_point, gamma_val, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelImage), &args);
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(LevelImageChannel) args = { new_image, channel, black_point, white_point, gamma_val };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#level_colors(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8709

VALUE
Image_level_colors(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickPixel black_color, white_color;
    ChannelType channels;
    MagickBooleanType invert = MagickTrue;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    rm_init_magickpixel(image, &white_color);
    rm_init_magickpixel(image, &black_color);

    switch (argc)
    {
        case 3:
            invert = (MagickBooleanType)RTEST(argv[2]);

        case 2:
            Color_to_MagickPixel(image, &white_color, argv[1]);
            Color_to_MagickPixel(image, &black_color, argv[0]);
            break;

        case 1:
            rm_set_magickpixel(&white_color, "white");
            Color_to_MagickPixel(image, &black_color, argv[0]);
            break;

        case 0:
            rm_set_magickpixel(&white_color, "white");
            rm_set_magickpixel(&black_color, "black");
            break;

        default:
            raise_ChannelType_error(argv[argc-1]);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(LevelImageColors) args = { new_image, &black_color, &white_color, invert, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelImageColors), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(LevelColorsImageChannel) args = { new_image, channels, &black_color, &white_color, invert };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelColorsImageChannel), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(new_image, DestroyOnError);
#endif
    if (!okay)
    {
        DestroyImage(new_image);
        rb_raise(rb_eRuntimeError, "LevelImageColors failed for unknown reason.");
    }

    return rm_image_new(new_image);
}

#levelize_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8798

VALUE
Image_levelize_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    double black_point, white_point;
    double gamma = 1.0;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    if (argc > 3)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    switch (argc)
    {
        case 3:
            gamma = NUM2DBL(argv[2]);
        case 2:
            white_point = NUM2DBL(argv[1]);
            black_point = NUM2DBL(argv[0]);
            break;
        case 1:
            black_point = NUM2DBL(argv[0]);
            white_point = QuantumRange - black_point;
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or more)", argc);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(LevelizeImage) args = { new_image, black_point, white_point, gamma, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelizeImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(LevelizeImageChannel) args = { new_image, channels, black_point, white_point, gamma };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LevelizeImageChannel), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    if (!okay)
    {
        DestroyImage(new_image);
        rb_raise(rb_eRuntimeError, "LevelizeImageChannel failed for unknown reason.");
    }
    return rm_image_new(new_image);
}

#linear_stretch(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8875

VALUE
Image_linear_stretch(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double black_point, white_point;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    get_black_white_point(image, argc, argv, &black_point, &white_point);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(LinearStretchImage) args = { new_image, black_point, white_point, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LinearStretchImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(LinearStretchImage) args = { new_image, black_point, white_point };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LinearStretchImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#liquid_rescale(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 8915

VALUE
Image_liquid_rescale(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    unsigned long cols, rows;
    double delta_x = 0.0;
    double rigidity = 0.0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 4:
            rigidity = NUM2DBL(argv[3]);
        case 3:
            delta_x = NUM2DBL(argv[2]);
        case 2:
            rows = NUM2ULONG(argv[1]);
            cols = NUM2ULONG(argv[0]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 4)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(LiquidRescaleImage) args = { image, cols, rows, delta_x, rigidity, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(LiquidRescaleImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#magnify ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9071

VALUE
Image_magnify(VALUE self)
{
    rm_check_destroyed(self);
    return magnify(False, self, GVL_FUNC(MagnifyImage));
}

#magnify! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9086

VALUE
Image_magnify_bang(VALUE self)
{
    rm_check_frozen(self);
    return magnify(True, self, GVL_FUNC(MagnifyImage));
}

#marshal_dump ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9100

VALUE
Image_marshal_dump(VALUE self)
{
    Image *image;
    Info *info;
    unsigned char *blob;
    size_t length;
    VALUE ary;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    info = CloneImageInfo(NULL);
    if (!info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to initialize Info object");
    }

    ary = rb_ary_new2(2);
    rb_ary_store(ary, 0, rb_str_new2(image->filename));

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ImageToBlob) args = { info, image, &length, exception };
    blob = (unsigned char *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ImageToBlob), &args);

    // Destroy info before raising an exception
    DestroyImageInfo(info);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);

    rb_ary_store(ary, 1, rb_str_new((char *)blob, (long)length));
    magick_free((void*)blob);

    return ary;
}

#marshal_load(ary) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9143

VALUE
Image_marshal_load(VALUE self, VALUE ary)
{
    VALUE blob, filename;
    Info *info;
    Image *image, *new_image;
    ExceptionInfo *exception;

    TypedData_Get_Struct(self, Image, &rm_image_data_type, image);

    Check_Type(ary, T_ARRAY);

    filename = rb_ary_shift(ary);
    blob = rb_ary_shift(ary);

    filename = StringValue(filename);
    blob = StringValue(blob);

    info = CloneImageInfo(NULL);
    if (!info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to initialize Info object");
    }

    exception = AcquireExceptionInfo();
    if (filename != Qnil)
    {
        strlcpy(info->filename, RSTRING_PTR(filename), sizeof(info->filename));
    }
    GVL_STRUCT_TYPE(BlobToImage) args = { info, RSTRING_PTR(blob), (size_t)RSTRING_LEN(blob), exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BlobToImage), &args);

    // Destroy info before raising an exception
    DestroyImageInfo(info);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);

    UPDATE_DATA_PTR(self, new_image);
    rm_image_destroy(image);

    RB_GC_GUARD(filename);
    RB_GC_GUARD(blob);

    return self;
}

#mask(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9383

VALUE
Image_mask(int argc, VALUE *argv, VALUE self)
{
    VALUE mask;
    Image *image;

    image = rm_check_destroyed(self);
    if (argc == 0)
    {
        return get_image_mask(image);
    }
    if (argc > 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (expected 0 or 1, got %d)", argc);
    }

    rb_check_frozen(self);
    mask = argv[0];
    return set_image_mask(image, mask);
}

#matte_color ⇒ String

Return the matte color.

Returns:

  • (String) —

    the matte color



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# File 'ext/RMagick/rmimage.cpp', line 9410

VALUE
Image_matte_color(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return rm_pixelcolor_to_color_name(image, &image->matte_color);
}

#matte_color=(color) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9423

VALUE
Image_matte_color_eq(VALUE self, VALUE color)
{
    Image *image = rm_check_frozen(self);
    Color_to_PixelColor(&image->matte_color, color);
    return color;
}

#matte_fill_to_border(x, y) ⇒ Object

Make transparent any neighbor pixel that is not the border color.



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# File 'lib/rmagick_internal.rb', line 953

def matte_fill_to_border(x, y)
  f = copy
  f.alpha(OpaqueAlphaChannel) unless f.alpha?
  f.matte_flood_fill(border_color, x, y, FillToBorderMethod, alpha: TransparentAlpha)
end

#matte_flood_fill(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9443

VALUE
Image_matte_flood_fill(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    PixelColor target;
    Quantum alpha;
    long x, y;
    PaintMethod method;
    DrawInfo *draw_info;
    MagickPixel target_mpp;
    MagickBooleanType invert;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif
    VALUE color_obj, x_obj, y_obj, method_obj, kwargs;

    image = rm_check_destroyed(self);

    rb_scan_args(argc, argv, "4:", &color_obj, &x_obj, &y_obj, &method_obj, &kwargs);

    alpha = get_named_alpha_value(kwargs);

    Color_to_PixelColor(&target, color_obj);
    VALUE_TO_ENUM(method_obj, method, PaintMethod);
    if (!(method == FloodfillMethod || method == FillToBorderMethod))
    {
        rb_raise(rb_eArgError, "paint method_obj must be FloodfillMethod or "
                 "FillToBorderMethod (%d given)", method);
    }
    x = NUM2LONG(x_obj);
    y = NUM2LONG(y_obj);
    if ((unsigned long)x > image->columns || (unsigned long)y > image->rows)
    {
        rb_raise(rb_eArgError, "target out of range. %ldx%ld given, image is %" RMIuSIZE "x%" RMIuSIZE "",
                 x, y, image->columns, image->rows);
    }


    new_image = rm_clone_image(image);

    // FloodfillPaintImage looks for the opacity in the DrawInfo.fill field.
    draw_info = CloneDrawInfo(NULL, NULL);
    if (!draw_info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }
#if defined(IMAGEMAGICK_7)
    rm_set_pixelinfo_alpha(&draw_info->fill, alpha);
#else
    draw_info->fill.opacity = QuantumRange - alpha;
#endif

    if (method == FillToBorderMethod)
    {
        invert = MagickTrue;
        target_mpp.red   = (MagickRealType) image->border_color.red;
        target_mpp.green = (MagickRealType) image->border_color.green;
        target_mpp.blue  = (MagickRealType) image->border_color.blue;
#if defined(IMAGEMAGICK_7)
        rm_set_pixelinfo_alpha(&target_mpp, (MagickRealType) image->border_color.alpha);
#else
        target_mpp.opacity = (MagickRealType) image->border_color.opacity;
#endif
    }
    else
    {
        invert = MagickFalse;
        target_mpp.red   = (MagickRealType) target.red;
        target_mpp.green = (MagickRealType) target.green;
        target_mpp.blue  = (MagickRealType) target.blue;
#if defined(IMAGEMAGICK_7)
        rm_set_pixelinfo_alpha(&target_mpp, (MagickRealType) target.alpha);
#else
        target_mpp.opacity = (MagickRealType) target.opacity;
#endif
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, OpacityChannel);
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, draw_info, &target_mpp, x, y, invert, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);
    END_CHANNEL_MASK(new_image);
    DestroyDrawInfo(draw_info);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, OpacityChannel, draw_info, &target_mpp, x, y, invert };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);
    DestroyDrawInfo(draw_info);

    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#matte_floodfill(x, y) ⇒ Object

Make transparent any pixel that matches the color of the pixel at (x,y) and is a neighbor.



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# File 'lib/rmagick_internal.rb', line 945

def matte_floodfill(x, y)
  f = copy
  f.alpha(OpaqueAlphaChannel) unless f.alpha?
  target = f.pixel_color(x, y)
  f.matte_flood_fill(target, x, y, FloodfillMethod, alpha: TransparentAlpha)
end

#matte_point(x, y) ⇒ Object

Make the pixel at (x,y) transparent.



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# File 'lib/rmagick_internal.rb', line 925

def matte_point(x, y)
  f = copy
  f.alpha(OpaqueAlphaChannel) unless f.alpha?
  pixel = f.pixel_color(x, y)
  pixel.alpha = TransparentAlpha
  f.pixel_color(x, y, pixel)
  f
end

#matte_replace(x, y) ⇒ Object

Make transparent all pixels that are the same color as the pixel at (x, y).



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# File 'lib/rmagick_internal.rb', line 936

def matte_replace(x, y)
  f = copy
  f.alpha(OpaqueAlphaChannel) unless f.alpha?
  target = f.pixel_color(x, y)
  f.transparent(target)
end

#matte_reset! ⇒ Object

Make all pixels transparent.



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# File 'lib/rmagick_internal.rb', line 960

def matte_reset!
  alpha(TransparentAlphaChannel)
  self
end

#mean_error_per_pixel ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9583

VALUE
Image_mean_error_per_pixel(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READERF(Image, mean_error_per_pixel, error.mean_error_per_pixel, dbl, &rm_image_data_type);
}

#median_filter(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9549

VALUE
Image_median_filter(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double radius = 0.0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 1:
            radius = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(StatisticImage) args = { image, MedianStatistic, (size_t)radius, (size_t)radius, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(StatisticImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#mime_type ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9595

VALUE
Image_mime_type(VALUE self)
{
    Image *image;
    char *type;
    VALUE mime_type;

    image = rm_check_destroyed(self);
    type = MagickToMime(image->magick);
    if (!type)
    {
        return Qnil;
    }
    mime_type = rb_str_new2(type);

    // The returned string must be deallocated by the user.
    magick_free(type);

    RB_GC_GUARD(mime_type);

    return mime_type;
}

#minify ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9625

VALUE
Image_minify(VALUE self)
{
    rm_check_destroyed(self);
    return magnify(False, self, GVL_FUNC(MinifyImage));
}

#minify! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9639

VALUE
Image_minify_bang(VALUE self)
{
    rm_check_frozen(self);
    return magnify(True, self, GVL_FUNC(MinifyImage));
}

#modulate(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9659

VALUE
Image_modulate(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double pct_brightness = 100.0,
    pct_saturation = 100.0,
    pct_hue        = 100.0;
    char modulate[100];
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 3:
            pct_hue        = rm_percentage2(argv[2], 1.0, false) * 100.0;
        case 2:
            pct_saturation = rm_percentage2(argv[1], 1.0, false) * 100.0;
        case 1:
            pct_brightness = rm_percentage(argv[0], 1.0) * 100.0;
            break;
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 3)", argc);
            break;
    }

    if (pct_brightness <= 0.0)
    {
        rb_raise(rb_eArgError, "brightness is %g%%, must be positive", pct_brightness);
    }
    snprintf(modulate, sizeof(modulate), "%f%%,%f%%,%f%%", pct_brightness, pct_saturation, pct_hue);

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ModulateImage) args = { new_image, modulate, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ModulateImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(ModulateImage) args = { new_image, modulate };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ModulateImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#monochrome? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9718

VALUE
Image_monochrome_q(VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return has_image_attribute(self, IsImageMonochrome);
#else
    return has_attribute(self, IsMonochromeImage);
#endif
}

#montage ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9734

VALUE
Image_montage(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, montage, str, &rm_image_data_type);
}

#morphology(method_v, iterations, kernel_v) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4688

VALUE
Image_morphology(VALUE self, VALUE method_v, VALUE iterations, VALUE kernel_v)
{
    static VALUE default_channels_const = 0;

    if(!default_channels_const)
    {
        default_channels_const = rb_const_get(Module_Magick, rb_intern("DefaultChannels"));
    }

    return Image_morphology_channel(self, default_channels_const, method_v, iterations, kernel_v);
}

#morphology_channel(channel_v, method_v, iterations_v, kernel_v) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 4714

VALUE
Image_morphology_channel(VALUE self, VALUE channel_v, VALUE method_v, VALUE iterations_v, VALUE kernel_v)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    MorphologyMethod method;
    ChannelType channel;
    KernelInfo *kernel;
    ssize_t iterations = NUM2LONG(iterations_v);;

    image = rm_check_destroyed(self);

    VALUE_TO_ENUM(method_v, method, MorphologyMethod);
    VALUE_TO_ENUM(channel_v, channel, ChannelType);

    if (TYPE(kernel_v) == T_STRING)
    {
        kernel_v = rb_class_new_instance(1, &kernel_v, Class_KernelInfo);
    }

    if (!rb_obj_is_kind_of(kernel_v, Class_KernelInfo))
    {
        rb_raise(rb_eArgError, "expected String or Magick::KernelInfo");
    }

    TypedData_Get_Struct(kernel_v, KernelInfo, &rm_kernel_info_data_type, kernel);

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channel);
    GVL_STRUCT_TYPE(MorphologyImage) args = { image, method, iterations, kernel, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(MorphologyImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(MorphologyImageChannel) args = { image, channel, method, iterations, kernel, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(MorphologyImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#motion_blur(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9810

VALUE
Image_motion_blur(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return motion_blur(argc, argv, self, GVL_FUNC(MotionBlurImage));
}

#negate(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9826

VALUE
Image_negate(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickBooleanType grayscale = MagickFalse;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    if (argc == 1)
    {
        grayscale = (MagickBooleanType)RTEST(argv[0]);
    }
    else if (argc > 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(NegateImage) args = { new_image, grayscale, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NegateImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(NegateImage) args = { new_image, grayscale };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NegateImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#negate_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 9879

VALUE
Image_negate_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    MagickBooleanType grayscale = MagickFalse;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // There can be at most 1 remaining argument.
    if (argc > 1)
    {
        raise_ChannelType_error(argv[argc-1]);
    }
    else if (argc == 1)
    {
        grayscale = (MagickBooleanType)RTEST(argv[0]);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(NegateImage) args = { new_image, grayscale, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NegateImage), &args);
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(NegateImageChannel) args = { new_image, channels, grayscale };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NegateImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#normalize ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10058

VALUE
Image_normalize(VALUE self)
{
    Image *image, *new_image;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(NormalizeImage) args = { new_image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NormalizeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(NormalizeImage) args = { new_image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NormalizeImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#normalize_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10097

VALUE
Image_normalize_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    // Ensure all arguments consumed.
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(NormalizeImage) args = { new_image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NormalizeImage), &args);
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(NormalizeImageChannel) args = { new_image, channels };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(NormalizeImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#normalized_maximum_error ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10150

VALUE
Image_normalized_maximum_error(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READERF(Image, normalized_maximum_error, error.normalized_maximum_error, dbl, &rm_image_data_type);
}

#normalized_mean_error ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10139

VALUE
Image_normalized_mean_error(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READERF(Image, normalized_mean_error, error.normalized_mean_error, dbl, &rm_image_data_type);
}

#number_colors ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10162

VALUE
Image_number_colors(VALUE self)
{
    Image *image;
    ExceptionInfo *exception;
    size_t n = 0;

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(GetNumberColors) args = { image, NULL, exception };
    n = (size_t)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetNumberColors), &args);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    return ULONG2NUM(n);
}

#offset ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10187

VALUE
Image_offset(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, offset, long, &rm_image_data_type);
}

#offset=(val) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10199

VALUE
Image_offset_eq(VALUE self, VALUE val)
{
    IMPLEMENT_TYPED_ATTR_WRITER(Image, offset, long, &rm_image_data_type);
}

#oil_paint(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10213

VALUE
Image_oil_paint(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double radius = 3.0;
    ExceptionInfo *exception;
#if defined(IMAGEMAGICK_7)
    double sigma = 1.0;
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 1:
            radius = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(OilPaintImage) args = { image, radius, sigma, exception };
#else
    GVL_STRUCT_TYPE(OilPaintImage) args = { image, radius, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(OilPaintImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#opaque(target, fill) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10262

VALUE
Image_opaque(VALUE self, VALUE target, VALUE fill)
{
    Image *image, *new_image;
    MagickPixel target_pp;
    MagickPixel fill_pp;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    // Allow color name or Pixel
    Color_to_MagickPixel(image, &target_pp, target);
    Color_to_MagickPixel(image, &fill_pp, fill);

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(OpaquePaintImage) args = { new_image, &target_pp, &fill_pp, MagickFalse, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(OpaquePaintImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(OpaquePaintImageChannel) args = { new_image, DefaultChannels, &target_pp, &fill_pp, MagickFalse };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(OpaquePaintImageChannel), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    if (!okay)
    {
        // Force exception
        DestroyImage(new_image);
        rm_ensure_result(NULL);
    }

    return rm_image_new(new_image);
}

#opaque? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10409

VALUE
Image_opaque_q(VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return has_attribute(self, IsImageOpaque);
#else
    return has_attribute(self, IsOpaqueImage);
#endif
}

#opaque_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10328

VALUE
Image_opaque_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickPixel target_pp, fill_pp;
    ChannelType channels;
    double keep, fuzz;
    MagickBooleanType okay, invert = MagickFalse;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    if (argc > 4)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    // Default fuzz value is image's fuzz attribute.
    fuzz = image->fuzz;

    switch (argc)
    {
        case 4:
            fuzz = NUM2DBL(argv[3]);
            if (fuzz < 0.0)
            {
                rb_raise(rb_eArgError, "fuzz must be >= 0.0 (%g given)", fuzz);
            }
        case 3:
            invert = (MagickBooleanType)RTEST(argv[2]);
        case 2:
            // Allow color name or Pixel
            Color_to_MagickPixel(image, &fill_pp, argv[1]);
            Color_to_MagickPixel(image, &target_pp, argv[0]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (got %d, expected 2 or more)", argc);
            break;
    }

    new_image = rm_clone_image(image);
    keep = new_image->fuzz;
    new_image->fuzz = fuzz;

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(OpaquePaintImage) args = { new_image, &target_pp, &fill_pp, invert, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(OpaquePaintImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    END_CHANNEL_MASK(new_image);
    new_image->fuzz = keep;
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(OpaquePaintImageChannel) args = { new_image, channels, &target_pp, &fill_pp, invert };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(OpaquePaintImageChannel), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));

    new_image->fuzz = keep;
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    if (!okay)
    {
        // Force exception
        DestroyImage(new_image);
        rm_ensure_result(NULL);
    }

    return rm_image_new(new_image);
}

#ordered_dither(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10430

VALUE
Image_ordered_dither(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    int order;
    const char *threshold_map = "2x2";
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    if (argc > 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
    }
    if (argc == 1)
    {
        if (TYPE(argv[0]) == T_STRING)
        {
            threshold_map = StringValueCStr(argv[0]);
        }
        else
        {
            order = NUM2INT(argv[0]);
            if (order == 3)
            {
                threshold_map = "3x3";
            }
            else if (order == 4)
            {
                threshold_map = "4x4";
            }
            else if (order != 2)
            {
                rb_raise(rb_eArgError, "order must be 2, 3, or 4 (%d given)", order);
            }
        }
    }

    new_image = rm_clone_image(image);

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(OrderedDitherImage) args = { new_image, threshold_map, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(OrderedDitherImage), &args);
#else
    GVL_STRUCT_TYPE(OrderedPosterizeImage) args = { new_image, threshold_map, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(OrderedPosterizeImage), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);

    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#orientation ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10492

VALUE
Image_orientation(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return OrientationType_find(image->orientation);
}

#orientation=(orientation) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10506

VALUE
Image_orientation_eq(VALUE self, VALUE orientation)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(orientation, image->orientation, OrientationType);
    return orientation;
}

#page ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10520

VALUE
Image_page(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return Import_RectangleInfo(&image->page);
}

#page=(rect) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10534

VALUE
Image_page_eq(VALUE self, VALUE rect)
{
    Image *image = rm_check_frozen(self);
    Export_RectangleInfo(&image->page, rect);
    return rect;
}

#paint_transparent(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10557

VALUE
Image_paint_transparent(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickPixel color;
    Quantum alpha = TransparentAlpha;
    double keep, fuzz;
    MagickBooleanType okay, invert;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif
    VALUE color_obj, invert_obj, fuzz_obj, kwargs;

    image = rm_check_destroyed(self);

    rb_scan_args(argc, argv, "12:", &color_obj, &invert_obj, &fuzz_obj, &kwargs);

    Color_to_MagickPixel(image, &color, color_obj);
    invert = (invert_obj != Qnil) ? (MagickBooleanType)RTEST(invert_obj) : MagickFalse;
    fuzz = (fuzz_obj != Qnil) ? NUM2DBL(fuzz_obj) : image->fuzz;
    if (RTEST(kwargs))
    {
        alpha = get_named_alpha_value(kwargs);
    }

    new_image = rm_clone_image(image);

    // Use fuzz value from caller
    keep = new_image->fuzz;
    new_image->fuzz = fuzz;

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(TransparentPaintImage) args = { new_image, (const MagickPixel *)&color, alpha, invert, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransparentPaintImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    new_image->fuzz = keep;
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(TransparentPaintImage) args = { new_image, (const MagickPixel *)&color, (Quantum)(QuantumRange - alpha), invert };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransparentPaintImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    new_image->fuzz = keep;

    // Is it possible for TransparentPaintImage to silently fail?
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    if (!okay)
    {
        // Force exception
        DestroyImage(new_image);
        rm_ensure_result(NULL);
    }

    return rm_image_new(new_image);
}

#palette? ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10622

VALUE
Image_palette_q(VALUE self)
{
#if defined(IMAGEMAGICK_7)
    return has_image_attribute(self, IsPaletteImage);
#else
    return has_attribute(self, IsPaletteImage);
#endif
}

#pixel_color(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10665

VALUE
Image_pixel_color(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    Pixel new_color;
    PixelPacket old_color;
    ExceptionInfo *exception;
    long x, y;
    unsigned int set = False;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    Quantum *pixel;
    const Quantum *old_pixel;
#else
    PixelPacket *pixel;
    const PixelPacket *old_pixel;
    MagickPixel mpp;
    IndexPacket *indexes;
#endif

    memset(&old_color, 0, sizeof(old_color));

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 3:
            rb_check_frozen(self);
            set = True;
            // Replace with new color? The arg can be either a color name or
            // a Magick::Pixel.
            Color_to_Pixel(&new_color, argv[2]);
        case 2:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)", argc);
            break;
    }

    x = NUM2LONG(argv[0]);
    y = NUM2LONG(argv[1]);

    // Get the color of a pixel
    if (!set)
    {
        exception = AcquireExceptionInfo();
        GVL_STRUCT_TYPE(GetVirtualPixels) args = { image, x, y, 1, 1, exception };
        void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetVirtualPixels), &args);
        old_pixel = reinterpret_cast<decltype(old_pixel)>(ret);
        CHECK_EXCEPTION();

        DestroyExceptionInfo(exception);

#if defined(IMAGEMAGICK_7)
        old_color.red   = GetPixelRed(image, old_pixel) + 0.5;
        old_color.green = GetPixelGreen(image, old_pixel) + 0.5;
        old_color.blue  = GetPixelBlue(image, old_pixel) + 0.5;
        old_color.alpha = GetPixelAlpha(image, old_pixel) + 0.5;
        old_color.black = GetPixelBlack(image, old_pixel) + 0.5;
        return Pixel_from_PixelPacket(&old_color);
#else
        old_color = *old_pixel;
        indexes = GetAuthenticIndexQueue(image);
        // PseudoClass
        if (image->storage_class == PseudoClass)
        {
            old_color = image->colormap[(unsigned long)*indexes];
        }
        if (!image->matte)
        {
            old_color.opacity = OpaqueOpacity;
        }

        rm_init_magickpixel(image, &mpp);
        mpp.red = GetPixelRed(&old_color);
        mpp.green = GetPixelGreen(&old_color);
        mpp.blue = GetPixelBlue(&old_color);
        mpp.opacity = GetPixelOpacity(&old_color);
        if (indexes)
        {
            mpp.index = GetPixelIndex(indexes);
        }
        return Pixel_from_MagickPixel(&mpp);
#endif
    }

    // ImageMagick segfaults if the pixel location is out of bounds.
    // Do what IM does and return the background color.
    if (x < 0 || y < 0 || (unsigned long)x >= image->columns || (unsigned long)y >= image->rows)
    {
        return Pixel_from_PixelColor(&image->background_color);
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
#endif

    if (image->storage_class == PseudoClass)
    {
#if defined(IMAGEMAGICK_7)
        GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, DirectClass, exception };
        void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
        okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
        CHECK_EXCEPTION();
        if (!okay)
        {
            DestroyExceptionInfo(exception);
            rb_raise(Class_ImageMagickError, "SetImageStorageClass failed. Can't set pixel color.");
        }
#else
        GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, DirectClass };
        void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
        okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
        rm_check_image_exception(image, RetainOnError);
        if (!okay)
        {
            rb_raise(Class_ImageMagickError, "SetImageStorageClass failed. Can't set pixel color.");
        }
#endif
    }

#if defined(IMAGEMAGICK_6)
    exception = AcquireExceptionInfo();
#endif

    GVL_STRUCT_TYPE(GetAuthenticPixels) args = { image, x, y, 1, 1, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetAuthenticPixels), &args);
    pixel = reinterpret_cast<decltype(pixel)>(ret);
    CHECK_EXCEPTION();

    if (pixel)
    {
#if defined(IMAGEMAGICK_7)
        old_color.red   = GetPixelRed(image, pixel) + 0.5;
        old_color.green = GetPixelGreen(image, pixel) + 0.5;
        old_color.blue  = GetPixelBlue(image, pixel) + 0.5;
        old_color.alpha = GetPixelAlpha(image, pixel) + 0.5;
        old_color.black = GetPixelBlack(image, pixel) + 0.5;

        SetPixelRed(image,   new_color.red,   pixel);
        SetPixelGreen(image, new_color.green, pixel);
        SetPixelBlue(image,  new_color.blue,  pixel);
        SetPixelAlpha(image, new_color.alpha, pixel);
        SetPixelBlack(image, new_color.black, pixel);
#else
        old_color = *pixel;
        indexes = GetAuthenticIndexQueue(image);
        if (!image->matte)
        {
            old_color.opacity = OpaqueOpacity;
        }

        SetPixelRed(pixel,     new_color.red);
        SetPixelGreen(pixel,   new_color.green);
        SetPixelBlue(pixel,    new_color.blue);
        SetPixelOpacity(pixel, new_color.opacity);
        if (indexes)
        {
            SetPixelIndex(indexes, new_color.black);
        }
#endif

        GVL_STRUCT_TYPE(SyncAuthenticPixels) args = { image, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SyncAuthenticPixels), &args);
        CHECK_EXCEPTION();
    }

    DestroyExceptionInfo(exception);

    return Pixel_from_PixelPacket(&old_color);
}

#pixel_interpolation_method ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10844

VALUE
Image_pixel_interpolation_method(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return PixelInterpolateMethod_find(image->interpolate);
}

#pixel_interpolation_method=(method) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10859

VALUE
Image_pixel_interpolation_method_eq(VALUE self, VALUE method)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(method, image->interpolate, PixelInterpolateMethod);
    return method;
}

#polaroid(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10892

VALUE
Image_polaroid(int argc, VALUE *argv, VALUE self)
{
    Image *image, *clone, *new_image;
    VALUE options;
    double angle = -5.0;
    Draw *draw;
    ExceptionInfo *exception;
#if defined(IMAGEMAGICK_7)
    const char *caption;
#endif

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 1:
            angle = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }

    options = rm_polaroid_new();
    TypedData_Get_Struct(options, Draw, &rm_draw_data_type, draw);

    clone = rm_clone_image(image);
    clone->background_color = draw->shadow_color;
    clone->border_color = draw->info->border_color;

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    caption = GetImageProperty(clone, "Caption", exception);
    GVL_STRUCT_TYPE(PolaroidImage) args = { clone, draw->info, caption, angle, image->interpolate, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(PolaroidImage), &args);
#else
    GVL_STRUCT_TYPE(PolaroidImage) args = { clone, draw->info, angle, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(PolaroidImage), &args);
#endif
    rm_check_exception(exception, clone, DestroyOnError);

    DestroyImage(clone);
    DestroyExceptionInfo(exception);

    RB_GC_GUARD(options);

    return rm_image_new(new_image);
}

#posterize(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 10952

VALUE
Image_posterize(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickBooleanType dither = MagickFalse;
    unsigned long levels = 4;
#if defined(IMAGEMAGICK_7)
    DitherMethod dither_method;
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 2:
            dither = (MagickBooleanType) RTEST(argv[1]);
            /* fall through */
        case 1:
            levels = NUM2ULONG(argv[0]);
            /* fall through */
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 2)", argc);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    dither_method = dither ? RiemersmaDitherMethod : NoDitherMethod;
    GVL_STRUCT_TYPE(PosterizeImage) args = { new_image, levels, dither_method, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(PosterizeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(PosterizeImage) args = { new_image, levels, dither };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(PosterizeImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#preview(preview) ⇒ Magick::Image

Creates an image that contains 9 small versions of the receiver image. The center image is the unchanged receiver. The other 8 images are variations created by transforming the receiver according to the specified preview type with varying parameters.

Returns:



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# File 'ext/RMagick/rmimage.cpp', line 11004

VALUE
Image_preview(VALUE self, VALUE preview)
{
    Image *image, *new_image;
    PreviewType preview_type;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    VALUE_TO_ENUM(preview, preview_type, PreviewType);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(PreviewImage) args = { image, preview_type, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(PreviewImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);

    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#profile!(name, profile) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11033

VALUE
Image_profile_bang(VALUE self, VALUE name, VALUE profile)
{

    if (profile == Qnil)
    {
        return Image_delete_profile(self, name);
    }
    else
    {
        return set_profile(self, StringValueCStr(name), profile);
    }

}

#properties ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12924

VALUE
Image_properties(VALUE self)
{
    Image *image;
    VALUE attr_hash, ary;
    const char *property, *value;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
#endif

    if (rb_block_given_p())
    {
        long i;

        // Collect the properties first so that neither the ExceptionInfo nor
        // the property iterator is held across rb_yield. The block may break
        // or raise, which would otherwise leak the ExceptionInfo.
        ary = rb_ary_new();

        ResetImagePropertyIterator(image);
        property = GetNextImageProperty(image);
        while (property)
        {
#if defined(IMAGEMAGICK_7)
            value = GetImageProperty(image, property, exception);
#else
            value = GetImageProperty(image, property);
#endif
            rb_ary_push(ary, rb_assoc_new(rb_str_new2(property), value ? rb_str_new2(value) : Qnil));
            property = GetNextImageProperty(image);
        }
#if defined(IMAGEMAGICK_7)
        CHECK_EXCEPTION();
        DestroyExceptionInfo(exception);
#else
        rm_check_image_exception(image, RetainOnError);
#endif

        for (i = 0; i < RARRAY_LEN(ary); i++)
        {
            rb_yield(rb_ary_entry(ary, i));
        }

        RB_GC_GUARD(ary);

        return self;
    }

    // otherwise return properties hash
    else
    {
        attr_hash = rb_hash_new();
        ResetImagePropertyIterator(image);
        property = GetNextImageProperty(image);
        while (property)
        {
#if defined(IMAGEMAGICK_7)
            value = GetImageProperty(image, property, exception);
#else
            value = GetImageProperty(image, property);
#endif
            rb_hash_aset(attr_hash, rb_str_new2(property), value ? rb_str_new2(value) : Qnil);
            property = GetNextImageProperty(image);
        }
#if defined(IMAGEMAGICK_7)
        CHECK_EXCEPTION();
        DestroyExceptionInfo(exception);
#else
        rm_check_image_exception(image, RetainOnError);
#endif

        RB_GC_GUARD(attr_hash);

        return attr_hash;
    }

}

#quality ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11054

VALUE
Image_quality(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, quality, ulong, &rm_image_data_type);
}

#quantize(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11274

VALUE
Image_quantize(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    QuantizeInfo quantize_info;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    GetQuantizeInfo(&quantize_info);

    switch (argc)
    {
        case 5:
            quantize_info.measure_error = (MagickBooleanType) RTEST(argv[4]);
        case 4:
            quantize_info.tree_depth = NUM2UINT(argv[3]);
        case 3:
            if (rb_obj_is_kind_of(argv[2], Class_DitherMethod))
            {
                VALUE_TO_ENUM(argv[2], quantize_info.dither_method, DitherMethod);
#if defined(IMAGEMAGICK_6)
                quantize_info.dither = (MagickBooleanType)(quantize_info.dither_method != NoDitherMethod);
#endif
            }
            else
            {
#if defined(IMAGEMAGICK_7)
                quantize_info.dither_method = RTEST(argv[2]) ? RiemersmaDitherMethod : NoDitherMethod;
#else
                quantize_info.dither = (MagickBooleanType) RTEST(argv[2]);
#endif
            }
        case 2:
            VALUE_TO_ENUM(argv[1], quantize_info.colorspace, ColorspaceType);
        case 1:
            quantize_info.number_colors = NUM2UINT(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 5)", argc);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(QuantizeImage) args = { &quantize_info, new_image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(QuantizeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(QuantizeImage) args = { &quantize_info, new_image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(QuantizeImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#quantum_depth ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11066

VALUE
Image_quantum_depth(VALUE self)
{
    Image *image;
    unsigned long quantum_depth;

    image = rm_check_destroyed(self);
    quantum_depth = GetImageQuantumDepth(image, MagickFalse);

    return ULONG2NUM(quantum_depth);
}

#quantum_operator(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11099

VALUE
Image_quantum_operator(int argc, VALUE *argv, VALUE self)
{
    Image *image;
    QuantumExpressionOperator quantum_expression_op;
    MagickEvaluateOperator qop;
    double rvalue;
    ChannelType channel;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    // The default channel is AllChannels
    channel = AllChannels;

    /*
        If there are 3 arguments, argument 2 is a ChannelType argument.
        Arguments 1 and 0 are required and are the rvalue and operator,
        respectively.
    */
    switch (argc)
    {
        case 3:
            VALUE_TO_ENUM(argv[2], channel, ChannelType);
            /* Fall through */
        case 2:
            rvalue = NUM2DBL(argv[1]);
            VALUE_TO_ENUM(argv[0], quantum_expression_op, QuantumExpressionOperator);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 or 3)", argc);
            break;
    }

    // Map QuantumExpressionOperator to MagickEvaluateOperator
    switch (quantum_expression_op)
    {
        default:
        case UndefinedQuantumOperator:
            qop = UndefinedEvaluateOperator;
            break;
        case AddQuantumOperator:
            qop = AddEvaluateOperator;
            break;
        case AndQuantumOperator:
            qop = AndEvaluateOperator;
            break;
        case DivideQuantumOperator:
            qop = DivideEvaluateOperator;
            break;
        case LShiftQuantumOperator:
            qop = LeftShiftEvaluateOperator;
            break;
        case MaxQuantumOperator:
            qop = MaxEvaluateOperator;
            break;
        case MinQuantumOperator:
            qop = MinEvaluateOperator;
            break;
        case MultiplyQuantumOperator:
            qop = MultiplyEvaluateOperator;
            break;
        case OrQuantumOperator:
            qop = OrEvaluateOperator;
            break;
        case RShiftQuantumOperator:
            qop = RightShiftEvaluateOperator;
            break;
        case SubtractQuantumOperator:
            qop = SubtractEvaluateOperator;
            break;
        case XorQuantumOperator:
            qop = XorEvaluateOperator;
            break;
        case PowQuantumOperator:
            qop = PowEvaluateOperator;
            break;
        case LogQuantumOperator:
            qop = LogEvaluateOperator;
            break;
        case ThresholdQuantumOperator:
            qop = ThresholdEvaluateOperator;
            break;
        case ThresholdBlackQuantumOperator:
            qop = ThresholdBlackEvaluateOperator;
            break;
        case ThresholdWhiteQuantumOperator:
            qop = ThresholdWhiteEvaluateOperator;
            break;
        case GaussianNoiseQuantumOperator:
            qop = GaussianNoiseEvaluateOperator;
            break;
        case ImpulseNoiseQuantumOperator:
            qop = ImpulseNoiseEvaluateOperator;
            break;
        case LaplacianNoiseQuantumOperator:
            qop = LaplacianNoiseEvaluateOperator;
            break;
        case MultiplicativeNoiseQuantumOperator:
            qop = MultiplicativeNoiseEvaluateOperator;
            break;
        case PoissonNoiseQuantumOperator:
            qop = PoissonNoiseEvaluateOperator;
            break;
        case UniformNoiseQuantumOperator:
            qop = UniformNoiseEvaluateOperator;
            break;
        case CosineQuantumOperator:
            qop = CosineEvaluateOperator;
            break;
        case SetQuantumOperator:
            qop = SetEvaluateOperator;
            break;
        case SineQuantumOperator:
            qop = SineEvaluateOperator;
            break;
        case AddModulusQuantumOperator:
            qop = AddModulusEvaluateOperator;
            break;
        case MeanQuantumOperator:
            qop = MeanEvaluateOperator;
            break;
        case AbsQuantumOperator:
            qop = AbsEvaluateOperator;
            break;
        case ExponentialQuantumOperator:
            qop = ExponentialEvaluateOperator;
            break;
        case MedianQuantumOperator:
            qop = MedianEvaluateOperator;
            break;
        case SumQuantumOperator:
            qop = SumEvaluateOperator;
            break;
        case RootMeanSquareQuantumOperator:
            qop = RootMeanSquareEvaluateOperator;
            break;
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channel);
    GVL_STRUCT_TYPE(EvaluateImage) args = { image, qop, rvalue, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EvaluateImage), &args);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(EvaluateImageChannel) args = { image, channel, qop, rvalue, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(EvaluateImageChannel), &args);
#endif
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    return self;
}

#radial_blur(angle_obj) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11343

VALUE
Image_radial_blur(VALUE self, VALUE angle_obj)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    double angle = NUM2DBL(angle_obj);

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(RotationalBlurImage) args = { image, angle, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RotationalBlurImage), &args);
    new_image = reinterpret_cast<decltype(new_image)>(ret);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#radial_blur_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11376

VALUE
Image_radial_blur_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    ChannelType channels;
    double angle;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // There must be 1 remaining argument.
    if (argc == 0)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (0 for 1 or more)");
    }
    else if (argc > 1)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    angle = NUM2DBL(argv[0]);
    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(RotationalBlurImage) args = { image, angle, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RotationalBlurImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(RotationalBlurImageChannel) args = { image, channels, angle, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RotationalBlurImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#raise(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11507

VALUE
Image_raise(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    RectangleInfo rect;
    MagickBooleanType raised = MagickTrue;      // default
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    memset(&rect, 0, sizeof(rect));
    rect.width = 6;         // default
    rect.height = 6;        // default

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 3:
            raised = (MagickBooleanType)RTEST(argv[2]);
        case 2:
            rect.height = NUM2ULONG(argv[1]);
        case 1:
            rect.width = NUM2ULONG(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 3)", argc);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(RaiseImage) args = { new_image, &rect, raised, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RaiseImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(RaiseImage) args = { new_image, &rect, raised };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RaiseImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#random_threshold_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11432

VALUE
Image_random_threshold_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    char *thresholds;
    VALUE geom_str;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    channels = extract_channels(&argc, argv);

    // There must be 1 remaining argument.
    if (argc == 0)
    {
        rb_raise(rb_eArgError, "missing threshold argument");
    }
    else if (argc > 1)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    // Accept any argument that has a to_s method.
    geom_str = rb_String(argv[0]);
    thresholds = StringValueCStr(geom_str);

    new_image = rm_clone_image(image);

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    {
        GeometryInfo geometry_info;

        if (ParseGeometry(thresholds, &geometry_info) == NoValue && *thresholds)
        {
            (void) ThrowMagickException(exception, GetMagickModule(), OptionError,
                                        "InvalidArgument", "'%s'", thresholds);
        }
        else
        {
            BEGIN_CHANNEL_MASK(new_image, channels);
            {
                GVL_STRUCT_TYPE(RandomThresholdImage) args = { new_image, geometry_info.rho, geometry_info.sigma, exception };
                CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RandomThresholdImage), &args);
            }
            END_CHANNEL_MASK(new_image);
        }
    }
#else
    GVL_STRUCT_TYPE(RandomThresholdImageChannel) args = { new_image, channels, thresholds, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RandomThresholdImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);

    DestroyExceptionInfo(exception);

    RB_GC_GUARD(geom_str);

    return rm_image_new(new_image);
}

#recolor(color_matrix) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11697

VALUE
Image_recolor(VALUE self, VALUE color_matrix)
{
    Image *image, *new_image;
    unsigned long order;
    long x, len;
    double *matrix;
    ExceptionInfo *exception;
    KernelInfo *kernel_info;

    image = rm_check_destroyed(self);
    color_matrix = rm_check_ary_type(color_matrix);

    // Allocate color matrix from Ruby's memory
    len = RARRAY_LEN(color_matrix);
    matrix = ALLOC_N(double, len);

    for (x = 0; x < len; x++)
    {
        VALUE element = rb_ary_entry(color_matrix, x);
        if (rm_check_num2dbl(element))
        {
            matrix[x] = NUM2DBL(element);
        }
        else
        {
            xfree(matrix);
            rb_raise(rb_eTypeError, "type mismatch: %s given", rb_class2name(CLASS_OF(element)));
        }
    }

    order = (unsigned long)sqrt((double)len);

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    kernel_info = AcquireKernelInfo(NULL, exception);
    if (rm_should_raise_exception(exception, RetainExceptionRetention))
    {
        if (kernel_info != (KernelInfo *) NULL)
        {
            DestroyKernelInfo(kernel_info);
        }
        xfree((void *)matrix);
        rm_raise_exception(exception);
    }
#else
    kernel_info = AcquireKernelInfo(NULL);
#endif
    if (kernel_info == (KernelInfo *) NULL)
    {
        xfree((void *) matrix);
        DestroyExceptionInfo(exception);
        return Qnil;
    }
    kernel_info->width = order;
    kernel_info->height = order;
    kernel_info->values = (double *) matrix;

    GVL_STRUCT_TYPE(ColorMatrixImage) args = { image, kernel_info, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ColorMatrixImage), &args);
    kernel_info->values = (double *) NULL;
    DestroyKernelInfo(kernel_info);
    xfree((void *) matrix);

    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#reduce_noise(radius) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11874

VALUE
Image_reduce_noise(VALUE self, VALUE radius)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    size_t radius_size = NUM2SIZET(radius);

    image = rm_check_destroyed(self);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(StatisticImage) args = { image, NonpeakStatistic, radius_size, radius_size, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(StatisticImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);

    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#remap(*args) ⇒ Object Also known as: affinity 



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# File 'ext/RMagick/rmimage.cpp', line 11905

VALUE
Image_remap(int argc, VALUE *argv, VALUE self)
{
    Image *image, *remap_image;
    QuantizeInfo quantize_info;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

    GetQuantizeInfo(&quantize_info);

    switch (argc)
    {
        case 2:
            VALUE_TO_ENUM(argv[1], quantize_info.dither_method, DitherMethod);
#if defined(IMAGEMAGICK_6)
            quantize_info.dither = MagickTrue;
#endif
            break;
        case 1:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 or 2)", argc);
            break;
    }

    remap_image = rm_check_destroyed(rm_cur_image(argv[0]));

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(RemapImage) args = { &quantize_info, image, remap_image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RemapImage), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(RemapImage) args = { &quantize_info, image, remap_image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RemapImage), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    return self;
}

#rendering_intent ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11956

VALUE
Image_rendering_intent(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return RenderingIntent_find(image->rendering_intent);
}

#rendering_intent=(ri) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 11970

VALUE
Image_rendering_intent_eq(VALUE self, VALUE ri)
{
    Image *image = rm_check_frozen(self);
    VALUE_TO_ENUM(ri, image->rendering_intent, RenderingIntent);
    return ri;
}

#resample(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12137

VALUE
Image_resample(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return resample(False, argc, argv, self);
}

#resample!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12157

VALUE
Image_resample_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return resample(True, argc, argv, self);
}

#resize(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12280

VALUE
Image_resize(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return resize(False, argc, argv, self);
}

#resize!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12306

VALUE
Image_resize_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return resize(True, argc, argv, self);
}

#resize_to_fill(ncols, nrows = nil, gravity = CenterGravity) ⇒ Object Also known as: crop_resized

Force an image to exact dimensions without changing the aspect ratio. Resize and crop if necessary. (Thanks to Jerett Taylor!)



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# File 'lib/rmagick_internal.rb', line 967

def resize_to_fill(ncols, nrows = nil, gravity = CenterGravity)
  copy.resize_to_fill!(ncols, nrows, gravity)
end

#resize_to_fill!(ncols, nrows = nil, gravity = CenterGravity) ⇒ Object Also known as: crop_resized! 



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# File 'lib/rmagick_internal.rb', line 971

def resize_to_fill!(ncols, nrows = nil, gravity = CenterGravity)
  nrows ||= ncols
  if ncols != columns || nrows != rows
    scale = [ncols / columns.to_f, nrows / rows.to_f].max
    resize!(scale * columns + 0.5, scale * rows + 0.5)
  end
  crop!(gravity, ncols, nrows, true) if ncols != columns || nrows != rows
  self
end

#resize_to_fit(cols, rows = nil) ⇒ Object

Convenience method to resize retaining the aspect ratio. (Thanks to Robert Manni!)



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# File 'lib/rmagick_internal.rb', line 987

def resize_to_fit(cols, rows = nil)
  rows ||= cols
  change_geometry(Geometry.new(cols, rows)) do |ncols, nrows|
    resize(ncols, nrows)
  end
end

#resize_to_fit!(cols, rows = nil) ⇒ Object 



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# File 'lib/rmagick_internal.rb', line 994

def resize_to_fit!(cols, rows = nil)
  rows ||= cols
  change_geometry(Geometry.new(cols, rows)) do |ncols, nrows|
    resize!(ncols, nrows)
  end
end

#roll(x_offset, y_offset) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12321

VALUE
Image_roll(VALUE self, VALUE x_offset, VALUE y_offset)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    ssize_t x = NUM2LONG(x_offset);
    ssize_t y = NUM2LONG(y_offset);

    image = rm_check_destroyed(self);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(RollImage) args = { image, x, y, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(RollImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#rotate(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12425

VALUE
Image_rotate(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return rotate(False, argc, argv, self);
}

#rotate!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12449

VALUE
Image_rotate_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return rotate(True, argc, argv, self);
}

#rows ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12462

VALUE
Image_rows(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, rows, int, &rm_image_data_type);
}

#sample(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12485

VALUE
Image_sample(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return scale(False, argc, argv, self, GVL_FUNC(SampleImage));
}

#sample!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12509

VALUE
Image_sample_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return scale(True, argc, argv, self, GVL_FUNC(SampleImage));
}

#scale(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12533

VALUE
Image_scale(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return scale(False, argc, argv, self, GVL_FUNC(ScaleImage));
}

#scale!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12557

VALUE
Image_scale_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return scale(True, argc, argv, self, GVL_FUNC(ScaleImage));
}

#scene ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12652

VALUE
Image_scene(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, scene, ulong, &rm_image_data_type);
}

#segment(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12861

VALUE
Image_segment(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ColorspaceType colorspace   = RGBColorspace;    // These are the Magick++ defaults
    MagickBooleanType verbose   = MagickFalse;
    double cluster_threshold    = 1.0;
    double smoothing_threshold  = 1.5;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 4:
            verbose = (MagickBooleanType)RTEST(argv[3]);
        case 3:
            smoothing_threshold = NUM2DBL(argv[2]);
        case 2:
            cluster_threshold = NUM2DBL(argv[1]);
        case 1:
            VALUE_TO_ENUM(argv[0], colorspace, ColorspaceType);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 4)", argc);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SegmentImage) args = { new_image, colorspace, verbose, cluster_threshold, smoothing_threshold, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SegmentImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SegmentImage) args = { new_image, colorspace, verbose, cluster_threshold, smoothing_threshold };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SegmentImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#selective_blur_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12678

VALUE
Image_selective_blur_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double radius, sigma, threshold;
    ExceptionInfo *exception;
    ChannelType channels;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    if (argc > 3)
    {
        raise_ChannelType_error(argv[argc-1]);
    }
    if (argc != 3)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 3 or more)", argc);
    }
    radius = NUM2DBL(argv[0]);
    sigma = NUM2DBL(argv[1]);

    // threshold is either a floating-point number or a string in the form "NN%".
    // Either way it's supposed to represent a percentage of the QuantumRange.
    threshold = rm_percentage(argv[2], 1.0) * QuantumRange;

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(SelectiveBlurImage) args = { image, radius, sigma, threshold, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SelectiveBlurImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(SelectiveBlurImageChannel) args = { image, channels, radius, sigma, threshold, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SelectiveBlurImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#separate(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12772

VALUE
Image_separate(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_images;
    ChannelType channels = UndefinedChannel;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // All arguments are ChannelType enums
    if (argc > 0)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(SeparateImages) args = { image, exception };
    new_images = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SeparateImages), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_images);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(SeparateImages) args = { image, channels, exception };
    new_images = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SeparateImages), &args);
#endif
    rm_check_exception(exception, new_images, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_imagelist_from_images(new_images);
}

#sepiatone(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12815

VALUE
Image_sepiatone(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double threshold = (double) QuantumRange;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 1:
            threshold = NUM2DBL(argv[0]);
            break;
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SepiaToneImage) args = { image, threshold, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SepiaToneImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#set_channel_depth(channel_arg, depth) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 12728

VALUE
Image_set_channel_depth(VALUE self, VALUE channel_arg, VALUE depth)
{
    Image *image;
    ChannelType channel;
    unsigned long channel_depth;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

    VALUE_TO_ENUM(channel_arg, channel, ChannelType);
    channel_depth = NUM2ULONG(depth);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(image, channel);
    GVL_STRUCT_TYPE(SetImageDepth) args = { image, channel_depth, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageDepth), &args);
    END_CHANNEL_MASK(image);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SetImageChannelDepth) args = { image, channel, channel_depth };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageChannelDepth), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    return self;
}

#shade(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13022

VALUE
Image_shade(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double azimuth = 30.0, elevation = 30.0;
    MagickBooleanType shading = MagickFalse;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 3:
            elevation = NUM2DBL(argv[2]);
        case 2:
            azimuth = NUM2DBL(argv[1]);
        case 1:
            shading = (MagickBooleanType)RTEST(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 3)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ShadeImage) args = { image, shading, azimuth, elevation, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ShadeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#shadow(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13070

VALUE
Image_shadow(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double alpha = 100.0;
    double sigma = 4.0;
    long x_offset = 4L;
    long y_offset = 4L;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 4:
            alpha = rm_percentage(argv[3], 1.0);   // Clamp to 1.0 < x <= 100.0
            if (fabs(alpha) < 0.01)
            {
                rb_warning("shadow will be transparent - alpha %g very small", alpha);
            }
            alpha = FMIN(alpha, 1.0);
            alpha = FMAX(alpha, 0.01);
            alpha *= 100.0;
        case 3:
            sigma = NUM2DBL(argv[2]);
        case 2:
            y_offset = NUM2LONG(argv[1]);
        case 1:
            x_offset = NUM2LONG(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 4)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ShadowImage) args = { image, alpha, sigma, x_offset, y_offset, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ShadowImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#sharpen(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13123

VALUE
Image_sharpen(int argc, VALUE *argv, VALUE self)
{
    return effect_image(self, argc, argv, GVL_FUNC(SharpenImage));
}

#sharpen_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13145

VALUE
Image_sharpen_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    ExceptionInfo *exception;
    double radius = 0.0, sigma = 1.0;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    // There must be 0, 1, or 2 remaining arguments.
    switch (argc)
    {
        case 2:
            sigma = NUM2DBL(argv[1]);
            /* Fall thru */
        case 1:
            radius = NUM2DBL(argv[0]);
            /* Fall thru */
        case 0:
            break;
        default:
            raise_ChannelType_error(argv[argc-1]);
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(SharpenImage) args = { image, radius, sigma, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SharpenImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(SharpenImageChannel) args = { image, channels, radius, sigma, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SharpenImageChannel), &args);
#endif

    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#shave(width, height) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13199

VALUE
Image_shave(VALUE self, VALUE width, VALUE height)
{
    rm_check_destroyed(self);
    return xform_image(False, self, INT2FIX(0), INT2FIX(0), width, height, GVL_FUNC(ShaveImage));
}

#shave!(width, height) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13217

VALUE
Image_shave_bang(VALUE self, VALUE width, VALUE height)
{
    rm_check_frozen(self);
    return xform_image(True, self, INT2FIX(0), INT2FIX(0), width, height, GVL_FUNC(ShaveImage));
}

#shear(x_shear, y_shear) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13237

VALUE
Image_shear(VALUE self, VALUE x_shear, VALUE y_shear)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    double x = NUM2DBL(x_shear);
    double y = NUM2DBL(y_shear);

    image = rm_check_destroyed(self);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(ShearImage) args = { image, x, y, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ShearImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#sigmoidal_contrast_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13284

VALUE
Image_sigmoidal_contrast_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickBooleanType sharpen = MagickFalse;
    double contrast = 3.0;
    double midpoint = 50.0;
    ChannelType channels;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);

    switch (argc)
    {
        case 3:
            sharpen  = (MagickBooleanType) RTEST(argv[2]);
        case 2:
            midpoint = NUM2DBL(argv[1]);
        case 1:
            contrast = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            raise_ChannelType_error(argv[argc-1]);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    BEGIN_CHANNEL_MASK(new_image, channels);
    GVL_STRUCT_TYPE(SigmoidalContrastImage) args = { new_image, sharpen, contrast, midpoint, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SigmoidalContrastImage), &args);
    END_CHANNEL_MASK(new_image);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SigmoidalContrastImageChannel) args = { new_image, channels, sharpen, contrast, midpoint };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SigmoidalContrastImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#signature ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13340

VALUE
Image_signature(VALUE self)
{
    Image *image;
    const char *signature;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SignatureImage) args = { image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SignatureImage), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SignatureImage) args = { image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SignatureImage), &args);
    rm_check_image_exception(image, RetainOnError);
#endif
    signature = rm_get_property(image, "signature");
    if (!signature)
    {
        return Qnil;
    }
    return rb_str_new(signature, 64);
}

#sketch(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13381

VALUE
Image_sketch(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return motion_blur(argc, argv, self, GVL_FUNC(SketchImage));
}

#solarize(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13399

VALUE
Image_solarize(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double threshold = 50.0;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 1:
            threshold = NUM2DBL(argv[0]);
            if (threshold < 0.0 || threshold > QuantumRange)
            {
                rb_raise(rb_eArgError, "threshold out of range, must be >= 0.0 and < QuantumRange");
            }
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SolarizeImage) args = { new_image, threshold, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SolarizeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SolarizeImage) args = { new_image, threshold };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SolarizeImage), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#sparse_color(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13571

VALUE
Image_sparse_color(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    unsigned long x, nargs, ncolors;
    SparseColorMethod method;
    int n, exp;
    double * volatile args;
    ChannelType channels;
    MagickPixel pp;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    n = argc;
    channels = extract_channels(&argc, argv);
    n -= argc;  // n is now the number of channel arguments

    // After the channel arguments have been removed, and not counting the first
    // (method) argument, the number of arguments should be a multiple of 3.
    if (argc < 4 || argc % 3 != 1)
    {
        exp = (argc + 2) / 3 * 3;
        exp = max(exp, 3);
        rb_raise(rb_eArgError, "wrong number of arguments (expected at least %d, got %d)", n+exp+1,  n+argc);
    }

    // Get the method from the argument list
    VALUE_TO_ENUM(argv[0], method, SparseColorMethod);
    argv += 1;
    argc -= 1;

    // A lot of the following code is based on SparseColorOption, in wand/mogrify.c
    ncolors = count_channels(image, &channels);
    nargs = (argc / 3) * (2 + ncolors);

    // Allocate args from Ruby's memory so that GC will collect it if one of
    // the type conversions below raises an exception.
    args = ALLOC_N(double, nargs);
    memset(args, 0, nargs * sizeof(double));

    x = 0;
    n = 0;
    while (n < argc)
    {
        VALUE elem1 = argv[n++];
        VALUE elem2 = argv[n++];
        if (rm_check_num2dbl(elem1) && rm_check_num2dbl(elem2))
        {
            args[x++] = NUM2DBL(elem1);
            args[x++] = NUM2DBL(elem2);
        }
        else
        {
            xfree((void *) args);
            rb_raise(rb_eTypeError, "type mismatch: %s and %s given", rb_class2name(CLASS_OF(elem1)), rb_class2name(CLASS_OF(elem2)));
        }
        Color_to_MagickPixel(NULL, &pp, argv[n++]);
        if (channels & RedChannel)
        {
            args[x++] = pp.red / QuantumRange;
        }
        if (channels & GreenChannel)
        {
            args[x++] = pp.green / QuantumRange;
        }
        if (channels & BlueChannel)
        {
            args[x++] = pp.blue / QuantumRange;
        }
        if (channels & IndexChannel)
        {
            args[x++] = pp.index / QuantumRange;
        }
        if (channels & OpacityChannel)
        {
#if defined(IMAGEMAGICK_7)
            args[x++] = pp.alpha / QuantumRange;
#else
            args[x++] = pp.opacity / QuantumRange;
#endif
        }
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(SparseColorImage) args_SparseColorImage = { image, method, nargs, args, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SparseColorImage), &args_SparseColorImage);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(SparseColorImage) args_SparseColorImage = { image, channels, method, nargs, args, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SparseColorImage), &args_SparseColorImage);
#endif
    xfree((void *) args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#splice(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13688

VALUE
Image_splice(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    PixelColor color, old_color;
    RectangleInfo rectangle;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 4:
            // use background color
            color = image->background_color;
            break;
        case 5:
            // Convert color argument to PixelColor
            Color_to_PixelColor(&color, argv[4]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 4 or 5)", argc);
            break;
    }

    rectangle.x      = NUM2LONG(argv[0]);
    rectangle.y      = NUM2LONG(argv[1]);
    rectangle.width  = NUM2ULONG(argv[2]);
    rectangle.height = NUM2ULONG(argv[3]);

    exception = AcquireExceptionInfo();

    // Swap in color for the duration of this call.
    old_color = image->background_color;
    image->background_color = color;
    GVL_STRUCT_TYPE(SpliceImage) args = { image, &rectangle, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SpliceImage), &args);
    image->background_color = old_color;

    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#spread(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13741

VALUE
Image_spread(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double radius = 3.0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 1:
            radius = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(SpreadImage) args = { image, image->interpolate, radius, exception };
#else
    GVL_STRUCT_TYPE(SpreadImage) args = { image, radius, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SpreadImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#start_loop ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13779

VALUE
Image_start_loop(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, start_loop, boolean, &rm_image_data_type);
}

#start_loop=(val) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13791

VALUE
Image_start_loop_eq(VALUE self, VALUE val)
{
    IMPLEMENT_TYPED_ATTR_WRITER(Image, start_loop, boolean, &rm_image_data_type);
}

#stegano(watermark_image, offset) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13810

VALUE
Image_stegano(VALUE self, VALUE watermark_image, VALUE offset)
{
    Image *image, *new_image;
    VALUE wm_image;
    Image *watermark;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    wm_image = rm_cur_image(watermark_image);
    watermark = rm_check_destroyed(wm_image);

    image->offset = NUM2LONG(offset);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SteganoImage) args = { image, watermark, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SteganoImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);

    DestroyExceptionInfo(exception);

    RB_GC_GUARD(wm_image);

    return rm_image_new(new_image);
}

#stereo(offset_image_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13845

VALUE
Image_stereo(VALUE self, VALUE offset_image_arg)
{
    Image *image, *new_image;
    VALUE offset_image;
    Image *offset;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    offset_image = rm_cur_image(offset_image_arg);
    offset = rm_check_destroyed(offset_image);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(StereoImage) args = { image, offset, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(StereoImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);

    DestroyExceptionInfo(exception);

    RB_GC_GUARD(offset_image);

    return rm_image_new(new_image);
}

#store_pixels(x_arg, y_arg, cols_arg, rows_arg, new_pixels) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 13968

VALUE
Image_store_pixels(VALUE self, VALUE x_arg, VALUE y_arg, VALUE cols_arg,
                   VALUE rows_arg, VALUE new_pixels)
{
    Image *image;
    Pixel *pixel;
    VALUE new_pixel;
    long n, size;
    long x, y;
    unsigned long cols, rows;
    MagickBooleanType okay;
    ExceptionInfo *exception;
#if defined(IMAGEMAGICK_7)
    Quantum *pixels;
#else
    PixelPacket *pixels;
#endif

    image = rm_check_destroyed(self);

    x = NUM2LONG(x_arg);
    y = NUM2LONG(y_arg);
    cols = NUM2ULONG(cols_arg);
    rows = NUM2ULONG(rows_arg);
    if (x < 0 || y < 0 || x+cols > image->columns || y+rows > image->rows)
    {
        rb_raise(rb_eRangeError, "geometry (%lux%lu%+ld%+ld) exceeds image bounds",
                 cols, rows, x, y);
    }

    size = (long)(cols * rows);
    new_pixels = rb_Array(new_pixels);
    rm_check_ary_len(new_pixels, size);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, DirectClass, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    CHECK_EXCEPTION();
    if (!okay)
    {
        DestroyExceptionInfo(exception);
        rb_raise(Class_ImageMagickError, "SetImageStorageClass failed. Can't store pixels.");
    }
#else
    GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, DirectClass };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(image, RetainOnError);
    if (!okay)
    {
        rb_raise(Class_ImageMagickError, "SetImageStorageClass failed. Can't store pixels.");
    }
    exception = AcquireExceptionInfo();
#endif

    // Get a pointer to the pixels. Replace the values with the PixelPackets
    // from the pixels argument.
    {
        GVL_STRUCT_TYPE(GetAuthenticPixels) args = { image, x, y, cols, rows, exception };
        void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetAuthenticPixels), &args);
        pixels = reinterpret_cast<decltype(pixels)>(ret);
        CHECK_EXCEPTION();

        if (pixels)
        {
#if defined(IMAGEMAGICK_6)
            IndexPacket *indexes = GetAuthenticIndexQueue(image);
#endif
            for (n = 0; n < size; n++)
            {
                new_pixel = rb_ary_entry(new_pixels, n);
                if (CLASS_OF(new_pixel) != Class_Pixel)
                {
                    DestroyExceptionInfo(exception);
                    rb_raise(rb_eTypeError, "Item in array should be a Pixel.");
                }
                TypedData_Get_Struct(new_pixel, Pixel, &rm_pixel_data_type, pixel);
#if defined(IMAGEMAGICK_7)
                SetPixelRed(image,   pixel->red,   pixels);
                SetPixelGreen(image, pixel->green, pixels);
                SetPixelBlue(image,  pixel->blue,  pixels);
                SetPixelAlpha(image, pixel->alpha, pixels);
                SetPixelBlack(image, pixel->black, pixels);
                pixels += GetPixelChannels(image);
#else
                SetPixelRed(pixels, pixel->red);
                SetPixelGreen(pixels, pixel->green);
                SetPixelBlue(pixels, pixel->blue);
                SetPixelOpacity(pixels, pixel->opacity);
                if (indexes)
                {
                    SetPixelIndex(indexes + n, pixel->black);
                }
                pixels++;
#endif
            }
            GVL_STRUCT_TYPE(SyncAuthenticPixels) args = { image, exception };
            CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SyncAuthenticPixels), &args);
            CHECK_EXCEPTION();
        }

        DestroyExceptionInfo(exception);
    }

    RB_GC_GUARD(new_pixel);

    return self;
}

#strip! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14085

VALUE
Image_strip_bang(VALUE self)
{
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    Image *image = rm_check_frozen(self);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    StripImage(image, exception);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    StripImage(image);
    rm_check_image_exception(image, RetainOnError);
#endif
    return self;
}

#swirl(degrees_obj) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14115

VALUE
Image_swirl(VALUE self, VALUE degrees_obj)
{
    Image *image, *new_image;
    ExceptionInfo *exception;
    double degrees = NUM2DBL(degrees_obj);

    image = rm_check_destroyed(self);

    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(SwirlImage) args = { image, degrees, image->interpolate, exception };
#else
    GVL_STRUCT_TYPE(SwirlImage) args = { image, degrees, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SwirlImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#texture_fill_to_border(x, y, texture) ⇒ Object

Replace neighboring pixels to border color with texture pixels



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# File 'lib/rmagick_internal.rb', line 1008

def texture_fill_to_border(x, y, texture)
  texture_flood_fill(border_color, texture, x, y, FillToBorderMethod)
end

#texture_flood_fill(color_obj, texture_obj, x_obj, y_obj, method_obj) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14155

VALUE
Image_texture_flood_fill(VALUE self, VALUE color_obj, VALUE texture_obj,
                         VALUE x_obj, VALUE y_obj, VALUE method_obj)
{
    Image *image, *new_image;
    Image *texture_image;
    PixelColor color;
    VALUE texture;
    DrawInfo *draw_info;
    long x, y;
    PaintMethod method;
    MagickPixel color_mpp;
    MagickBooleanType invert;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    Color_to_PixelColor(&color, color_obj);
    texture = rm_cur_image(texture_obj);
    texture_image = rm_check_destroyed(texture);

    x = NUM2LONG(x_obj);
    y = NUM2LONG(y_obj);

    if ((unsigned long)x > image->columns || (unsigned long)y > image->rows)
    {
        rb_raise(rb_eArgError, "target out of range. %ldx%ld given, image is %" RMIuSIZE "x%" RMIuSIZE "",
                 x, y, image->columns, image->rows);
    }

    VALUE_TO_ENUM(method_obj, method, PaintMethod);
    if (method != FillToBorderMethod && method != FloodfillMethod)
    {
        rb_raise(rb_eArgError, "paint method must be FloodfillMethod or "
                 "FillToBorderMethod (%d given)", (int)method);
    }

    draw_info = CloneDrawInfo(NULL, NULL);
    if (!draw_info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }

    draw_info->fill_pattern = rm_clone_image(texture_image);
    new_image = rm_clone_image(image);


    rm_init_magickpixel(new_image, &color_mpp);
    if (method == FillToBorderMethod)
    {
        invert = MagickTrue;
        color_mpp.red   = (MagickRealType) image->border_color.red;
        color_mpp.green = (MagickRealType) image->border_color.green;
        color_mpp.blue  = (MagickRealType) image->border_color.blue;
    }
    else
    {
        invert = MagickFalse;
        color_mpp.red   = (MagickRealType) color.red;
        color_mpp.green = (MagickRealType) color.green;
        color_mpp.blue  = (MagickRealType) color.blue;
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, draw_info, &color_mpp, x, y, invert, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);
    DestroyDrawInfo(draw_info);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(FloodfillPaintImage) args = { new_image, DefaultChannels, draw_info, &color_mpp, x, y, invert };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FloodfillPaintImage), &args);

    DestroyDrawInfo(draw_info);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    RB_GC_GUARD(texture);

    return rm_image_new(new_image);
}

#texture_floodfill(x, y, texture) ⇒ Object

Replace matching neighboring pixels with texture pixels



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# File 'lib/rmagick_internal.rb', line 1002

def texture_floodfill(x, y, texture)
  target = pixel_color(x, y)
  texture_flood_fill(target, texture, x, y, FloodfillMethod)
end

#threshold(threshold_obj) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14248

VALUE
Image_threshold(VALUE self, VALUE threshold_obj)
{
    Image *image, *new_image;
    double threshold = NUM2DBL(threshold_obj);
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);
    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(BilevelImage) args = { new_image, threshold, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BilevelImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(BilevelImageChannel) args = { new_image, DefaultChannels, threshold };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(BilevelImageChannel), &args);
    rm_check_image_exception(new_image, DestroyOnError);
#endif

    return rm_image_new(new_image);
}

#thumbnail(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14446

VALUE
Image_thumbnail(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return thumbnail(False, argc, argv, self);
}

#thumbnail!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14469

VALUE
Image_thumbnail_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return thumbnail(True, argc, argv, self);
}

#ticks_per_second ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14484

VALUE
Image_ticks_per_second(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return INT2FIX(image->ticks_per_second);
}

#ticks_per_second=(tps) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14500

VALUE
Image_ticks_per_second_eq(VALUE self, VALUE tps)
{
    Image *image = rm_check_frozen(self);
    image->ticks_per_second = NUM2ULONG(tps);
    return tps;
}

#tint(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14522

VALUE
Image_tint(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    PixelColor tint;
    double red_pct_opaque, green_pct_opaque, blue_pct_opaque;
    double alpha_pct_opaque = 1.0;
    char alpha[50];
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    switch (argc)
    {
        case 2:
            red_pct_opaque   = NUM2DBL(argv[1]);
            green_pct_opaque = blue_pct_opaque = red_pct_opaque;
            break;
        case 3:
            red_pct_opaque   = NUM2DBL(argv[1]);
            green_pct_opaque = NUM2DBL(argv[2]);
            blue_pct_opaque  = red_pct_opaque;
            break;
        case 4:
            red_pct_opaque     = NUM2DBL(argv[1]);
            green_pct_opaque   = NUM2DBL(argv[2]);
            blue_pct_opaque    = NUM2DBL(argv[3]);
            break;
        case 5:
            red_pct_opaque     = NUM2DBL(argv[1]);
            green_pct_opaque   = NUM2DBL(argv[2]);
            blue_pct_opaque    = NUM2DBL(argv[3]);
            alpha_pct_opaque   = NUM2DBL(argv[4]);
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 2 to 5)", argc);
            break;
    }

    if (red_pct_opaque < 0.0 || green_pct_opaque < 0.0
        || blue_pct_opaque < 0.0 || alpha_pct_opaque < 0.0)
    {
        rb_raise(rb_eArgError, "alpha percentages must be non-negative.");
    }

    snprintf(alpha, sizeof(alpha),
            "%g,%g,%g,%g", red_pct_opaque*100.0, green_pct_opaque*100.0,
            blue_pct_opaque*100.0, alpha_pct_opaque*100.0);

    Color_to_PixelColor(&tint, argv[0]);
    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(TintImage) args = { image, alpha, &tint, exception };
#else
    GVL_STRUCT_TYPE(TintImage) args = { image, alpha, tint, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TintImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#to_blob ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14598

VALUE
Image_to_blob(VALUE self)
{
    Image *image;
    Info *info;
    const MagickInfo *magick_info;
    VALUE info_obj;
    VALUE blob_str;
    void *blob = NULL;
    size_t length = 2048;       // Do what Magick++ does
    ExceptionInfo *exception;

    // The user can specify the depth (8 or 16, if the format supports
    // both) and the image format by setting the depth and format
    // values in the info parm block.
    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, info);

    image = rm_check_destroyed(self);

    exception = AcquireExceptionInfo();

    // Copy the depth and magick fields to the Image
    if (info->depth != 0)
    {
#if defined(IMAGEMAGICK_7)
        GVL_STRUCT_TYPE(SetImageDepth) args = { image, info->depth, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageDepth), &args);
        CHECK_EXCEPTION();
#else
        GVL_STRUCT_TYPE(SetImageDepth) args = { image, info->depth };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageDepth), &args);
        rm_check_image_exception(image, RetainOnError);
#endif
    }

    if (*info->magick)
    {
        SetImageInfo(info, MagickTrue, exception);
        CHECK_EXCEPTION();

        if (*info->magick == '\0')
        {
            return Qnil;
        }
        strlcpy(image->magick, info->magick, sizeof(image->magick));
    }

    // Fix #2844 - libjpeg exits when image is 0x0
    magick_info = GetMagickInfo(image->magick, exception);
    CHECK_EXCEPTION();

    if (magick_info)
    {
        if (  (!rm_strcasecmp(magick_info->name, "JPEG")
               || !rm_strcasecmp(magick_info->name, "JPG"))
              && (image->rows == 0 || image->columns == 0))
        {
            rb_raise(rb_eRuntimeError, "Can't convert %" RMIuSIZE "x%" RMIuSIZE " %.4s image to a blob",
                     image->columns, image->rows, magick_info->name);
        }
    }

    rm_sync_image_options(image, info);

    GVL_STRUCT_TYPE(ImageToBlob) args = { info, image, &length, exception };
    blob = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(ImageToBlob), &args);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    if (length == 0 || !blob)
    {
        return Qnil;
    }

    blob_str = rb_str_new((const char *)blob, length);

    magick_free((void*)blob);

    RB_GC_GUARD(info_obj);
    RB_GC_GUARD(blob_str);

    return blob_str;
}

#to_color(pixel_arg) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14691

VALUE
Image_to_color(VALUE self, VALUE pixel_arg)
{
    Image *image;
    PixelColor pixel;
    ExceptionInfo *exception;
    char name[MaxTextExtent];

    image = rm_check_destroyed(self);
    Color_to_PixelColor(&pixel, pixel_arg);
    exception = AcquireExceptionInfo();

#if defined(IMAGEMAGICK_7)
    pixel.depth = MAGICKCORE_QUANTUM_DEPTH;
    pixel.colorspace = image->colorspace;
#endif

    // QueryColorname returns False if the color represented by the PixelPacket
    // doesn't have a "real" name, just a sequence of hex digits. We don't care
    // about that.

    QueryColorname(image, &pixel, AllCompliance, name, exception);
    CHECK_EXCEPTION();

    DestroyExceptionInfo(exception);

    return rb_str_new2(name);

}

#total_colors ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14728

VALUE
Image_total_colors(VALUE self)
{
    return Image_number_colors(self);
}

#total_ink_density ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14740

VALUE
Image_total_ink_density(VALUE self)
{
    Image *image;
    double density;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    density = GetImageTotalInkDensity(image, exception);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    density = GetImageTotalInkDensity(image);
    rm_check_image_exception(image, RetainOnError);
#endif

    return rb_float_new(density);
}

#transparent(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14780

VALUE
Image_transparent(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    MagickPixel color;
    Quantum alpha = TransparentAlpha;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif
    VALUE color_obj, kwargs;

    image = rm_check_destroyed(self);

    rb_scan_args(argc, argv, "1:", &color_obj, &kwargs);
    Color_to_MagickPixel(image, &color, color_obj);
    if (RTEST(kwargs))
    {
        alpha = get_named_alpha_value(kwargs);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(TransparentPaintImage) args = { new_image, &color, alpha, MagickFalse, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransparentPaintImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(TransparentPaintImage) args = { new_image, &color, (Quantum)(QuantumRange - alpha), MagickFalse };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransparentPaintImage), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(new_image, DestroyOnError);
#endif
    if (!okay)
    {
        // Force exception
        DestroyImage(new_image);
        rm_magick_error("TransparentPaintImage failed with no explanation");
    }

    return rm_image_new(new_image);
}

#transparent_chroma(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14843

VALUE
Image_transparent_chroma(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    Quantum alpha = TransparentAlpha;
    MagickPixel low, high;
    MagickBooleanType invert = MagickFalse;
    MagickBooleanType okay;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif
    VALUE low_obj, high_obj, invert_obj, kwargs;

    image = rm_check_destroyed(self);

    rb_scan_args(argc, argv, "21:", &low_obj, &high_obj, &invert_obj, &kwargs);

    Color_to_MagickPixel(image, &low, low_obj);
    Color_to_MagickPixel(image, &high, high_obj);
    if (invert_obj != Qnil)
    {
        invert = (MagickBooleanType)RTEST(invert_obj);
    }
    if (RTEST(kwargs))
    {
        alpha = get_named_alpha_value(kwargs);
    }

    new_image = rm_clone_image(image);

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(TransparentPaintImageChroma) args = { new_image, &low, &high, alpha, invert, exception };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransparentPaintImageChroma), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(TransparentPaintImageChroma) args = { new_image, &low, &high, (Quantum)(QuantumRange - alpha), invert };
    void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(TransparentPaintImageChroma), &args);
    okay = static_cast<MagickBooleanType>(reinterpret_cast<intptr_t &>(ret));
    rm_check_image_exception(new_image, DestroyOnError);
#endif
    if (!okay)
    {
        // Force exception
        DestroyImage(new_image);
        rm_magick_error("TransparentPaintImageChroma failed with no explanation");
    }

    return rm_image_new(new_image);
}

#transparent_color ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14902

VALUE
Image_transparent_color(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return rm_pixelcolor_to_color_name(image, &image->transparent_color);
}

#transparent_color=(color) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14916

VALUE
Image_transparent_color_eq(VALUE self, VALUE color)
{
    Image *image = rm_check_frozen(self);
    Color_to_PixelColor(&image->transparent_color, color);
    return color;
}

#transpose ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14932

VALUE
Image_transpose(VALUE self)
{
    rm_check_destroyed(self);
    return crisscross(False, self, GVL_FUNC(TransposeImage));
}

#transpose! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14948

VALUE
Image_transpose_bang(VALUE self)
{
    rm_check_frozen(self);
    return crisscross(True, self, GVL_FUNC(TransposeImage));
}

#transverse ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14963

VALUE
Image_transverse(VALUE self)
{
    rm_check_destroyed(self);
    return crisscross(False, self, GVL_FUNC(TransverseImage));
}

#transverse! ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 14978

VALUE
Image_transverse_bang(VALUE self)
{
    rm_check_frozen(self);
    return crisscross(True, self, GVL_FUNC(TransverseImage));
}

#trim(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15058

VALUE
Image_trim(int argc, VALUE *argv, VALUE self)
{
    rm_check_destroyed(self);
    return trimmer(False, argc, argv, self);
}

#trim!(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15078

VALUE
Image_trim_bang(int argc, VALUE *argv, VALUE self)
{
    rm_check_frozen(self);
    return trimmer(True, argc, argv, self);
}

#undefine(artifact) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15177

VALUE
Image_undefine(VALUE self, VALUE artifact)
{
    Image *image;
    char *key;

    image = rm_check_frozen(self);
    key = StringValueCStr(artifact);
    DeleteImageArtifact(image, key);
    return self;
}

#unique_colors ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15196

VALUE
Image_unique_colors(VALUE self)
{
    Image *image, *new_image;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(UniqueImageColors) args = { image, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(UniqueImageColors), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#units ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15219

VALUE
Image_units(VALUE self)
{
    Image *image = rm_check_destroyed(self);
    return ResolutionType_find(image->units);
}

#units=(restype) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15233

VALUE
Image_units_eq(VALUE self, VALUE restype)
{
    ResolutionType units;
    Image *image = rm_check_frozen(self);

    VALUE_TO_ENUM(restype, units, ResolutionType);

    if (image->units != units)
    {
        switch (image->units)
        {
            case PixelsPerInchResolution:
                if (units == PixelsPerCentimeterResolution)
                {
#if defined(IMAGEMAGICK_7)
                    image->resolution.x /= 2.54;
                    image->resolution.y /= 2.54;
#else
                    image->x_resolution /= 2.54;
                    image->y_resolution /= 2.54;
#endif
                }
                break;

            case PixelsPerCentimeterResolution:
                if (units == PixelsPerInchResolution)
                {
#if defined(IMAGEMAGICK_7)
                    image->resolution.x *= 2.54;
                    image->resolution.y *= 2.54;
#else
                    image->x_resolution *= 2.54;
                    image->y_resolution *= 2.54;
#endif
                }
                break;

            default:
                // UndefinedResolution
#if defined(IMAGEMAGICK_7)
                image->resolution.x = 0.0;
                image->resolution.y = 0.0;
#else
                image->x_resolution = 0.0;
                image->y_resolution = 0.0;
#endif
                break;
        }

        image->units = units;
    }

    return restype;
}

#unsharp_mask(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15360

VALUE
Image_unsharp_mask(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double radius = 0.0, sigma = 1.0, amount = 1.0, threshold = 0.05;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    unsharp_mask_args(argc, argv, &radius, &sigma, &amount, &threshold);

    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(UnsharpMaskImage) args = { image, radius, sigma, amount, threshold, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(UnsharpMaskImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#unsharp_mask_channel(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15408

VALUE
Image_unsharp_mask_channel(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    ChannelType channels;
    double radius = 0.0, sigma = 1.0, amount = 1.0, threshold = 0.05;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    channels = extract_channels(&argc, argv);
    if (argc > 4)
    {
        raise_ChannelType_error(argv[argc-1]);
    }

    unsharp_mask_args(argc, argv, &radius, &sigma, &amount, &threshold);

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    BEGIN_CHANNEL_MASK(image, channels);
    GVL_STRUCT_TYPE(UnsharpMaskImage) args = { image, radius, sigma, amount, threshold, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(UnsharpMaskImage), &args);
    CHANGE_RESULT_CHANNEL_MASK(new_image);
    END_CHANNEL_MASK(image);
#else
    GVL_STRUCT_TYPE(UnsharpMaskImageChannel) args = { image, channels, radius, sigma, amount, threshold, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(UnsharpMaskImageChannel), &args);
#endif
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#view(x, y, width, height) ⇒ Object

Construct a view. If a block is present, yield and pass the view object, otherwise return the view object.



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# File 'lib/rmagick_internal.rb', line 1014

def view(x, y, width, height)
  view = View.new(self, x, y, width, height)

  return view unless block_given?

  begin
    yield(view)
  ensure
    view.sync
  end
  nil
end

#vignette(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15453

VALUE
Image_vignette(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    long horz_radius, vert_radius;
    double radius = 0.0, sigma = 10.0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);

    horz_radius = (long)(image->columns * 0.10 + 0.5);
    vert_radius = (long)(image->rows * 0.10 + 0.5);

    switch (argc)
    {
        case 4:
            sigma = NUM2DBL(argv[3]);
        case 3:
            radius = NUM2DBL(argv[2]);
        case 2:
            vert_radius = NUM2INT(argv[1]);
        case 1:
            horz_radius = NUM2INT(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 4)", argc);
            break;
    }

    exception = AcquireExceptionInfo();

    GVL_STRUCT_TYPE(VignetteImage) args = { image, radius, sigma, horz_radius, vert_radius, exception };
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(VignetteImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#virtual_pixel_method ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15500

VALUE
Image_virtual_pixel_method(VALUE self)
{
    Image *image;
    VirtualPixelMethod vpm;

    image = rm_check_destroyed(self);
    vpm = GetImageVirtualPixelMethod(image);
    return VirtualPixelMethod_find(vpm);
}

#virtual_pixel_method=(method) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15519

VALUE
Image_virtual_pixel_method_eq(VALUE self, VALUE method)
{
    Image *image;
    VirtualPixelMethod vpm;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);
    VALUE_TO_ENUM(method, vpm, VirtualPixelMethod);
#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    SetImageVirtualPixelMethod(image, vpm, exception);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    SetImageVirtualPixelMethod(image, vpm);
    rm_check_image_exception(image, RetainOnError);
#endif
    return method;
}

#watermark(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15583

VALUE
Image_watermark(int argc, VALUE *argv, VALUE self)
{
    Image *image, *overlay, *new_image;
    double src_percent = 100.0, dst_percent = 100.0;
    long x_offset = 0L, y_offset = 0L;
    char geometry[20];
    VALUE ovly;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    if (argc < 1)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 to 6)", argc);
    }

    ovly = rm_cur_image(argv[0]);
    overlay = rm_check_destroyed(ovly);

    if (argc > 3)
    {
        get_composite_offsets(argc-3, &argv[3], image, overlay, &x_offset, &y_offset);
        // There must be 3 arguments left
        argc = 3;
    }

    switch (argc)
    {
        case 3:
            dst_percent = rm_percentage(argv[2], 1.0) * 100.0;
        case 2:
            src_percent = rm_percentage(argv[1], 1.0) * 100.0;
        case 1:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 1 to 6)", argc);
            break;
    }

    blend_geometry(geometry, sizeof(geometry), src_percent, dst_percent);
    CloneString(&overlay->geometry, geometry);
    if (!SetImageArtifact(overlay, "compose:args", geometry))
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }

    new_image = rm_clone_image(image);
#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(CompositeImage) args = { new_image, overlay, ModulateCompositeOp, MagickTrue, x_offset, y_offset, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompositeImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(CompositeImage) args = { new_image, ModulateCompositeOp, overlay, x_offset, y_offset };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CompositeImage), &args);

    rm_check_image_exception(new_image, DestroyOnError);
#endif

    RB_GC_GUARD(ovly);

    return rm_image_new(new_image);
}

#wave(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15661

VALUE
Image_wave(int argc, VALUE *argv, VALUE self)
{
    Image *image, *new_image;
    double amplitude = 25.0, wavelength = 150.0;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 2:
            wavelength = NUM2DBL(argv[1]);
        case 1:
            amplitude = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 2)", argc);
            break;
    }

    exception = AcquireExceptionInfo();
#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(WaveImage) args = { image, amplitude, wavelength, image->interpolate, exception };
#else
    GVL_STRUCT_TYPE(WaveImage) args = { image, amplitude, wavelength, exception };
#endif
    new_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(WaveImage), &args);
    rm_check_exception(exception, new_image, DestroyOnError);
    DestroyExceptionInfo(exception);

    return rm_image_new(new_image);
}

#wet_floor(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15715

VALUE
Image_wet_floor(int argc, VALUE *argv, VALUE self)
{
    Image *image, *reflection, *flip_image;
#if defined(IMAGEMAGICK_7)
    const Quantum *p;
    Quantum *q;
#else
    const PixelPacket *p;
    PixelPacket *q;
#endif
    RectangleInfo geometry;
    long x, y, max_rows;
    double initial = 0.5;
    double rate = 1.0;
    double opacity, step;
    const char *func;
    ExceptionInfo *exception;

    image = rm_check_destroyed(self);
    switch (argc)
    {
        case 2:
            rate = NUM2DBL(argv[1]);
        case 1:
            initial = NUM2DBL(argv[0]);
        case 0:
            break;
        default:
            rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 to 2)", argc);
            break;
    }


    if (initial < 0.0 || initial > 1.0)
    {
        rb_raise(rb_eArgError, "Initial transparency must be in the range 0.0-1.0 (%g)", initial);
    }
    if (rate < 0.0)
    {
        rb_raise(rb_eArgError, "Transparency change rate must be >= 0.0 (%g)", rate);
    }

#if defined(IMAGEMAGICK_7)
    initial *= QuantumRange;
#else
    initial *= TransparentOpacity;
#endif

    // The number of rows in which to transition from the initial level of
    // transparency to complete transparency. rate == 0.0 -> no change.
    if (rate > 0.0)
    {
        max_rows = (long)((double)image->rows) / (3.0 * rate);
        max_rows = (long)min((unsigned long)max_rows, image->rows);
#if defined(IMAGEMAGICK_7)
        step =  (QuantumRange - initial) / max_rows;
#else
        step =  (TransparentOpacity - initial) / max_rows;
#endif
    }
    else
    {
        max_rows = (long)image->rows;
        step = 0.0;
    }


    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(FlipImage) args_FlipImage = { image, exception };
    flip_image = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(FlipImage), &args_FlipImage);
    CHECK_EXCEPTION();


    geometry.x = 0;
    geometry.y = 0;
    geometry.width = image->columns;
    geometry.height = max_rows;
    GVL_STRUCT_TYPE(CropImage) args_CropImage = { flip_image, &geometry, exception };
    reflection = (Image *)CALL_FUNC_WITHOUT_GVL(GVL_FUNC(CropImage), &args_CropImage);
    DestroyImage(flip_image);
    CHECK_EXCEPTION();


#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(SetImageStorageClass) args_SetImageStorageClass = { reflection, DirectClass, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args_SetImageStorageClass);
    rm_check_exception(exception, reflection, DestroyOnError);
    GVL_STRUCT_TYPE(SetImageAlphaChannel) args_SetImageAlphaChannel = { reflection, ActivateAlphaChannel, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageAlphaChannel), &args_SetImageAlphaChannel);
    rm_check_exception(exception, reflection, DestroyOnError);
#else
    GVL_STRUCT_TYPE(SetImageStorageClass) args_SetImageStorageClass = { reflection, DirectClass };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args_SetImageStorageClass);
    rm_check_image_exception(reflection, DestroyOnError);


    reflection->matte = MagickTrue;
#endif
    opacity = initial;

    for (y = 0; y < max_rows; y++)
    {
#if defined(IMAGEMAGICK_7)
        if (opacity > QuantumRange)
        {
            opacity = QuantumRange;
        }
#else
        if (opacity > TransparentOpacity)
        {
            opacity = TransparentOpacity;
        }
#endif

        GVL_STRUCT_TYPE(GetVirtualPixels) args_GetVirtualPixels = { reflection, 0, y, image->columns, 1, exception };
        void *ret = CALL_FUNC_WITHOUT_GVL(GVL_FUNC(GetVirtualPixels), &args_GetVirtualPixels);
        p = reinterpret_cast<decltype(p)>(ret);
        rm_check_exception(exception, reflection, DestroyOnError);
        if (!p)
        {
            func = "AcquireImagePixels";
            goto error;
        }

        q = QueueAuthenticPixels(reflection, 0, y, image->columns, 1, exception);

        rm_check_exception(exception, reflection, DestroyOnError);
        if (!q)
        {
            func = "SetImagePixels";
            goto error;
        }

        for (x = 0; x < (long) image->columns; x++)
        {
            // Never make a pixel *less* transparent than it already is.
#if defined(IMAGEMAGICK_7)
            *q = *p;
            SetPixelAlpha(reflection, min(GetPixelAlpha(image, q), QuantumRange - (Quantum)opacity), q);

            p += GetPixelChannels(reflection);
            q += GetPixelChannels(reflection);
#else
            q[x] = p[x];
            q[x].opacity = max(q[x].opacity, (Quantum)opacity);
#endif
        }

        GVL_STRUCT_TYPE(SyncAuthenticPixels) args_SyncAuthenticPixels = { reflection, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SyncAuthenticPixels), &args_SyncAuthenticPixels);
        rm_check_exception(exception, reflection, DestroyOnError);

        opacity += step;
    }


    DestroyExceptionInfo(exception);
    return rm_image_new(reflection);

    error:
    DestroyExceptionInfo(exception);
    DestroyImage(reflection);
    rb_raise(rb_eRuntimeError, "%s failed on row %lu", func, y);
    return(VALUE)0;
}

#white_threshold(*args) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 15895

VALUE
Image_white_threshold(int argc, VALUE *argv, VALUE self)
{
    return threshold_image(argc, argv, self, GVL_FUNC(WhiteThresholdImage));
}

#write(file) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 16007

VALUE
Image_write(VALUE self, VALUE file)
{
    Image *image;
    Info *info;
    VALUE info_obj;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_destroyed(self);

    info_obj = rm_info_new();
    TypedData_Get_Struct(info_obj, Info, &rm_info_data_type, info);

    if (TYPE(file) == T_FILE)
    {
        rb_io_t *fptr;

        // Ensure file is open - raise error if not
        GetOpenFile(file, fptr);
        rb_io_check_writable(fptr);

        add_format_prefix(info, rm_io_path(file));
#if defined(_WIN32) && !defined(IMAGEMAGICK_GREATER_THAN_EQUAL_7_1_2)
        SetImageInfoFile(info, NULL);
#else
        SetImageInfoFile(info, rb_io_stdio_file(fptr));
#endif
    }
    else
    {
        add_format_prefix(info, file);
        SetImageInfoFile(info, NULL);
    }
    strlcpy(image->filename, info->filename, sizeof(image->filename));

    rm_sync_image_options(image, info);

    info->adjoin = MagickFalse;
#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    GVL_STRUCT_TYPE(WriteImage) args = { info, image, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(WriteImage), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(WriteImage) args = { info, image };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(WriteImage), &args);
    rm_check_image_exception(image, RetainOnError);
#endif

    RB_GC_GUARD(info_obj);

    return self;
}

#x_resolution ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 16116

VALUE
Image_x_resolution(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, x_resolution, dbl, &rm_image_data_type);
}

#x_resolution=(val) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 16128

VALUE
Image_x_resolution_eq(VALUE self, VALUE val)
{
    IMPLEMENT_TYPED_ATTR_WRITER(Image, x_resolution, dbl, &rm_image_data_type);
}

#y_resolution ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 16139

VALUE
Image_y_resolution(VALUE self)
{
    IMPLEMENT_TYPED_ATTR_READER(Image, y_resolution, dbl, &rm_image_data_type);
}

#y_resolution=(val) ⇒ Object 



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# File 'ext/RMagick/rmimage.cpp', line 16151

VALUE
Image_y_resolution_eq(VALUE self, VALUE val)
{
    IMPLEMENT_TYPED_ATTR_WRITER(Image, y_resolution, dbl, &rm_image_data_type);
}