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40 lines
1.0 KiB
Ruby
40 lines
1.0 KiB
Ruby
# 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-pattern.rb,v 1.1 2005/10/12 05:38:30 ktou Exp $
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=begin
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= cairo/Image Pattern
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This demo shows how to use GDK and cairo to use image pattern.
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From http://cairographics.org/samples/imagepattern.html.
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=end
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require 'common'
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module Demo
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class CairoImagePattern < CairoWindow
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def initialize
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super('cairo image pattern')
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end
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def draw(cr)
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image = Cairo::ImageSurface.from_png("ruby-gnome2-logo.png")
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pattern = Cairo::SurfacePattern.new(image)
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pattern.set_extend(Cairo::EXTEND_REPEAT)
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cr.translate(0.5, 0.5)
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cr.rotate(Math::PI / 4)
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cr.scale(1 / Math.sqrt(2), 1 / Math.sqrt(2))
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cr.translate(-0.5, -0.5)
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matrix = Cairo::Matrix.scale(image.width * 5, image.height * 5)
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pattern.set_matrix(matrix)
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cr.set_source(pattern)
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cr.rectangle(0, 0, 1.0, 1.0)
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cr.fill
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end
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end
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end
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