Class: Squib::Graphics::CairoContextWrapper

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Defined in:
lib/squib/graphics/cairo_context_wrapper.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cairo_cxt) ⇒ CairoContextWrapper

Returns a new instance of CairoContextWrapper.



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# File 'lib/squib/graphics/cairo_context_wrapper.rb', line 10

def initialize(cairo_cxt)
  @cairo_cxt = cairo_cxt
end

Instance Attribute Details

#cairo_cxt ⇒ Object 



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# File 'lib/squib/graphics/cairo_context_wrapper.rb', line 8

def cairo_cxt
  @cairo_cxt
end

Instance Method Details

#set_source_squibcolor(arg) ⇒ Object 



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# File 'lib/squib/graphics/cairo_context_wrapper.rb', line 20

def set_source_squibcolor(arg)
  if match = arg.match(LINEAR_GRADIENT)
    x1, y1, x2, y2 = match.captures
    linear = Cairo::LinearPattern.new(x1.to_f, y1.to_f, x2.to_f, y2.to_f)
    arg.scan(STOPS).each do |color, offset|
      linear.add_color_stop(offset.to_f, color)
    end
    @cairo_cxt.set_source(linear)
  elsif match = arg.match(RADIAL_GRADIENT)
    x1, y1, r1, x2, y2, r2  = match.captures
    linear = Cairo::RadialPattern.new(x1.to_f, y1.to_f, r1.to_f,
                                      x2.to_f, y2.to_f, r2.to_f)
    arg.scan(STOPS).each do |color, offset|
      linear.add_color_stop(offset.to_f, color)
    end
    @cairo_cxt.set_source(linear)
  else
    @cairo_cxt.set_source_color(arg)
  end
end