Module: Fontisan::Ufo::Compile::Os2

Defined in:
lib/fontisan/ufo/compile/os2.rb

Overview

Builds the OpenType OS/2 table from UFO fontinfo data. Default version is 4 (modern). Most fields are 0 unless the UFO has explicit values.

See Also:

Constant Summary collapse

VERSION_DEFAULT = 
4
WEIGHT_REGULAR = 
400
WIDTH_NORMAL = 
5
FS_SELECTION_REGULAR = 
0x0040

Class Method Summary collapse

Class Method Details

.build(font, glyphs:) ⇒ Fontisan::Tables::Os2

Parameters:

Returns:



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# File 'lib/fontisan/ufo/compile/os2.rb', line 20

def self.build(font, glyphs:)
  info = font.info
  cp_min, cp_max = unicode_range(glyphs)
  Fontisan::Tables::Os2.new(
    version: VERSION_DEFAULT,
    x_avg_char_width: avg_advance(glyphs),
    us_weight_class: info.open_type_os2_weight_class || WEIGHT_REGULAR,
    us_width_class: info.open_type_os2_width_class || WIDTH_NORMAL,
    fs_type: 0,
    y_subscript_x_size: 650,
    y_subscript_y_size: 600,
    y_subscript_x_offset: 0,
    y_subscript_y_offset: 75,
    y_superscript_x_size: 650,
    y_superscript_y_size: 600,
    y_superscript_x_offset: 0,
    y_superscript_y_offset: 350,
    y_strikeout_size: 50,
    y_strikeout_position: 300,
    s_family_class: 0,
    panose: Array.new(10, 0),
    ul_unicode_range1: 1, # Basic Latin
    ul_unicode_range2: 0,
    ul_unicode_range3: 0,
    ul_unicode_range4: 0,
    ach_vend_id: "NONE",
    fs_selection: FS_SELECTION_REGULAR,
    us_first_char_index: cp_min,
    us_last_char_index: cp_max,
    s_typo_ascender: info.ascender || 800,
    s_typo_descender: info.descender || -200,
    s_typo_line_gap: info.open_type_hhea_line_gap || 0,
    us_win_ascent: info.ascender || 1000,
    us_win_descent: -(info.descender || -200),
    ul_code_page_range1: 1, # Latin 1
    ul_code_page_range2: 0,
    sx_height: info.x_height || 500,
    s_cap_height: info.cap_height || 700,
    us_default_char: 0,
    us_break_char: 0x20,
    us_max_context: 0,
  )
end