50 lines
1.3 KiB
Ruby
50 lines
1.3 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-image.rb,v 1.2 2005/10/16 12:07:32 mutoh Exp $
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=begin
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= cairo/Image
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This demo shows how to use GDK and cairo to show image.
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From http://cairographics.org/samples/image.html.
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=end
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require 'common'
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module Demo
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class CairoImage < CairoWindow
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def initialize
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super('cairo gradient')
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end
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def draw(cr)
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cr.save do
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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.translate(0.5, 0.5)
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cr.rotate(45 * Math::PI / 180)
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cr.scale(1.0 / pixbuf.width, 1.0 / pixbuf.height)
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cr.translate(-0.5 * pixbuf.width, -0.5 * 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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image = Cairo::ImageSurface.from_png("ruby-gnome2-logo.png")
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cr.translate(0.5, 0.5)
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cr.rotate(60 * Math::PI / 180)
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cr.scale(0.8 / image.width, 0.8 / image.height)
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cr.translate(-0.5 * image.width, -0.5 * 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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