Class: Idml::TextEngine::Shaper

Inherits:
Object
  • Object
show all
Defined in:
lib/idml/text_engine/shaper.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(font, size) ⇒ Shaper

Returns a new instance of Shaper.



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# File 'lib/idml/text_engine/shaper.rb', line 14

def initialize(font, size)
  @font = font
  @size = size
  @scale = size.to_f / font.units_per_em
end

Class Method Details

.shape(text:, font:, size:) ⇒ Object 



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# File 'lib/idml/text_engine/shaper.rb', line 10

def self.shape(text:, font:, size:)
  new(font, size).shape(text)
end

Instance Method Details

#measure(glyphs) ⇒ Object 



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# File 'lib/idml/text_engine/shaper.rb', line 30

def measure(glyphs)
  glyphs.sum(&:width)
end

#shape(text) ⇒ Object 



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# File 'lib/idml/text_engine/shaper.rb', line 20

def shape(text)
  glyphs = []
  text.each_codepoint do |cp|
    raw_width = @font.glyph_width(cp)
    width = raw_width * @scale
    glyphs << ShapedGlyph.new(cp, width, cp == 32)
  end
  glyphs
end