class Demo::CairoImagePattern
Public Class Methods
new()
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Calls superclass method
# File gtk2/sample/gtk-demo/cairo-image-pattern.rb, line 15 def initialize super('cairo image pattern') end
Public Instance Methods
draw(cr)
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# File gtk2/sample/gtk-demo/cairo-image-pattern.rb, line 19 def draw(cr) image = Cairo::ImageSurface.from_png("ruby-gnome2-logo.png") pattern = Cairo::SurfacePattern.new(image) pattern.set_extend(Cairo::EXTEND_REPEAT) cr.translate(0.5, 0.5) cr.rotate(Math::PI / 4) cr.scale(1 / Math.sqrt(2), 1 / Math.sqrt(2)) cr.translate(-0.5, -0.5) matrix = Cairo::Matrix.scale(image.width * 5, image.height * 5) pattern.set_matrix(matrix) cr.set_source(pattern) cr.rectangle(0, 0, 1.0, 1.0) cr.fill end