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