Class: Fontisan::Ufo::Compile::TtfCompiler

Inherits:
BaseCompiler show all
Defined in:
lib/fontisan/ufo/compile/ttf_compiler.rb

Overview

UFO → TTF. Same tables as the OTF compiler plus glyf + loca (no CFF). Maxp version 1.0 carries the TrueType metrics.

Before glyf encoding, the TTF-required filters run:

- cubic_to_quadratic (TTF only supports quadratic Beziers)
- reverse_contour_direction (TTF winding convention)

Constant Summary collapse

SFNT_VERSION = 
SFNT_VERSION_TRUE_TYPE

Constants inherited from BaseCompiler

BaseCompiler::SFNT_VERSION_OPEN_TYPE, BaseCompiler::SFNT_VERSION_TRUE_TYPE

Instance Attribute Summary

Attributes inherited from BaseCompiler

#font

Instance Method Summary collapse

Methods inherited from BaseCompiler

#build_outline_tables, #initialize, #sfnt_version

Constructor Details

This class inherits a constructor from Fontisan::Ufo::Compile::BaseCompiler

Instance Method Details

#compile(output_path:) ⇒ Object 



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# File 'lib/fontisan/ufo/compile/ttf_compiler.rb', line 15

def compile(output_path:)
  glyphs = font.glyphs.values

  # Deep-clone glyphs so filters don't mutate the source UFO.
  filtered = clone_glyphs(glyphs)
  Filters.apply(Filters::TTF_REQUIRED, filtered)

  glyf_loca = GlyfLoca.build(font, glyphs: filtered)
  loca_format = glyf_loca.delete(:loca_format)

  tables = {
    "head" => Head.build(font, glyphs: filtered,
                               loca_format: loca_format || Head::LOCA_FORMAT_LONG),
    "hhea" => Hhea.build(font, glyphs: filtered),
    "maxp" => Maxp.build(font, glyphs: filtered,
                               version: Maxp::VERSION_TRUE_TYPE),
    "OS/2" => Os2.build(font, glyphs: filtered),
    "name" => Name.build(font),
    "post" => Post.build(font),
    "hmtx" => Hmtx.build(font, glyphs: filtered),
    "cmap" => Cmap.build(font, glyphs: filtered),
    "glyf" => glyf_loca["glyf"],
    "loca" => glyf_loca["loca"],
  }

  write(tables, output_path)
  output_path
end