class Grawlix::GlyphSizeCache
Constants
- DEFAULT_FONT_PATH
Public Class Methods
new(font_path = DEFAULT_FONT_PATH)
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# File lib/grawlix/glyph_size_cache.rb, line 7 def initialize(font_path = DEFAULT_FONT_PATH) @file = TTFunk::File.open(font_path) @cache = {} end
Public Instance Methods
em_size()
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# File lib/grawlix/glyph_size_cache.rb, line 16 def em_size @em ||= @file.header.units_per_em end
width_for(character)
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# File lib/grawlix/glyph_size_cache.rb, line 12 def width_for(character) @cache[character] ||= @file.horizontal_metrics.for(@file.cmap.unicode.first[character.unpack("U*").first]).advance_width.to_f / em_size end