Module: Emfsvg::PngDecoder

Defined in:
lib/emfsvg/png_decoder.rb

Overview

Decode PNG bytes to RGBA pixels. Wraps the libpng simplified API. Returns a Result with width, height, and a packed RGBA pixel buffer.

Defined Under Namespace

Classes: Result

Class Method Summary collapse

Class Method Details

.decode(png_bytes) ⇒ Object 



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# File 'lib/emfsvg/png_decoder.rb', line 13

def decode(png_bytes)
  return nil if png_bytes.nil? || png_bytes.empty?

  decoded = Libpng.decode(png_bytes, pixel_format: "RGBA")
  Result.new(width: decoded.width, height: decoded.height,
             pixels: decoded.pixels)
rescue Libpng::Error
  nil
end