Class: Fontisan::Ufo::Compile::Otf2Compiler

Inherits:
BaseCompiler show all
Defined in:
lib/fontisan/ufo/compile/otf2_compiler.rb

Overview

UFO → OTF (CFF2). Uses CFF2 outlines instead of CFF1.

CFF2 uses the same OTTO sfnt signature as CFF1. The difference is the table tag: CFF2 (vs CFF for CFF1). CFF2 enables variable font support and improved subroutinization.

Note: CFF2 does NOT bypass the 65,535 glyph cap. The maxp table's numGlyphs is uint16 in all OpenType versions, and the CFF2 CharStrings INDEX count must match it. For > 65,535 glyphs, use TTC splitting.

Constant Summary collapse

SFNT_VERSION = 
SFNT_VERSION_OPEN_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/otf2_compiler.rb', line 19

def compile(output_path:)
  glyphs = glyphs_with_notdef

  tables = {
    "head" => Head.build(font, glyphs: glyphs, loca_format: Head::LOCA_FORMAT_LONG),
    "hhea" => Hhea.build(font, glyphs: glyphs),
    "maxp" => Maxp.build(font, glyphs: glyphs, version: Maxp::VERSION_OPEN_TYPE),
    "OS/2" => Os2.build(font, glyphs: glyphs),
    "name" => Name.build(font),
    "post" => Post.build(font),
    "hmtx" => Hmtx.build(font, glyphs: glyphs),
    "cmap" => Cmap.build(font, glyphs: glyphs),
    "CFF2" => Cff2.build(font, glyphs: glyphs),
  }

  write(tables, output_path)
  output_path
end