Class: FreeType::API::Outline

Inherits:
Object
  • Object
show all
Includes:
C
Defined in:
lib/freetype/api.rb

Constant Summary

Constants included from C

C::FT_ENC_TAG, C::FT_Encoding, C::FT_Glyph_Format, C::FT_IMAGE_TAG, C::FT_Kerning_Mode, C::FT_LOAD_COLOR, C::FT_LOAD_COMPUTE_METRICS, C::FT_LOAD_CROP_BITMAP, C::FT_LOAD_DEFAULT, C::FT_LOAD_FORCE_AUTOHINT, C::FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH, C::FT_LOAD_IGNORE_TRANSFORM, C::FT_LOAD_LINEAR_DESIGN, C::FT_LOAD_MONOCHROME, C::FT_LOAD_NO_AUTOHINT, C::FT_LOAD_NO_BITMAP, C::FT_LOAD_NO_HINTING, C::FT_LOAD_NO_RECURSE, C::FT_LOAD_NO_SCALE, C::FT_LOAD_PEDANTIC, C::FT_LOAD_RENDER, C::FT_LOAD_VERTICAL_LAYOUT

Instance Method Summary collapse

Methods included from C::LazyAttach

#attach_function

Constructor Details

#initialize(outline) ⇒ Outline

Returns a new instance of Outline.



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# File 'lib/freetype/api.rb', line 181

def initialize(outline)
  @outline = outline
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/freetype/api.rb', line 185

def [](key)
  @outline[key]
end

#contours ⇒ Object 



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# File 'lib/freetype/api.rb', line 198

def contours
  return [] if @outline[:n_contours] == 0
  @outline[:contours].get_array_of_short(0, @outline[:n_contours])
end

#points ⇒ Object 



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# File 'lib/freetype/api.rb', line 189

def points
  points = @outline[:n_points].times.map do |i|
    FT_Vector.new(@outline[:points] + i * FT_Vector.size)
  end
  points.zip(tags).map do |(point, tag)|
    Point.new(tag, point[:x], point[:y])
  end
end

#svg_path_data ⇒ Object 



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# File 'lib/freetype/api.rb', line 208

def svg_path_data
  commands = []
  outline_funcs = FreeType::C::FT_Outline_Funcs.new
  outline_funcs[:move_to] = proc do |to|
    commands << [:M, to[:x], -to[:y]]
    0
  end
  outline_funcs[:line_to] = proc do |to|
    commands << [:L, to[:x], -to[:y]]
    0
  end
  outline_funcs[:conic_to] = proc do |ctrl, to|
    commands << [:Q, ctrl[:x], -ctrl[:y], to[:x], -to[:y]]
    0
  end
  outline_funcs[:cubic_to] = proc do |ctrl1, ctrl2, to|
    commands << [:C, ctrl1[:x], -ctrl1[:y], ctrl2[:x], -ctrl2[:y], to[:x], -to[:y]]
    0
  end
  err = FreeType::C::FT_Outline_Decompose(@outline, outline_funcs, nil)
  if err != 0
    raise FreeType::Error.find(err)
  end
  commands << [:Z] if commands.empty?.!
  commands
end

#tags ⇒ Object 



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# File 'lib/freetype/api.rb', line 203

def tags
  return [] if @outline[:n_points] == 0
  @outline[:tags].get_array_of_char(0, @outline[:n_points])
end