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Contents
# Copyright (c) 2005 Ruby-GNOME2 Project Team
# This program is licenced under the same licence as Ruby-GNOME2.
#
# $Id: cairo-clip-image.rb,v 1.2 2005/10/16 12:07:32 mutoh Exp $
=begin
= cairo/Clip Image
This demo shows how to use GDK and cairo to use clip for image.
From http://cairographics.org/samples/clip_image.html.
=end
require 'common'
module Demo
class CairoClipImage < CairoWindow
def initialize
super('cairo clip image')
end
def draw(cr)
cr.save do
cr.arc(0.5, 0.5, 0.4, 0, 2 * Math::PI)
cr.clip
cr.new_path
loader = Gdk::PixbufLoader.new
File.open("background.jpg", "rb") do |f|
loader.last_write(f.read)
end
pixbuf = loader.pixbuf
cr.scale(1.0 / pixbuf.width, 1.0 / pixbuf.height)
cr.set_source_pixbuf(pixbuf, 0, 0)
cr.paint
end
cr.save do
cr.arc(0.5, 0.5, 0.3, 0, 2 * Math::PI)
cr.clip
cr.new_path
image = Cairo::ImageSurface.from_png("ruby-gnome2-logo.png")
cr.scale(1.0 / image.width, 1.0 / image.height)
cr.set_source(image, 0, 0)
cr.paint
end
end
end
end
Version data entries
134 entries across 134 versions & 2 rubygems