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+ − <h1>Demo for composition modes</h1>+ −
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This demo shows some of the more advanced composition modes supported by Qt.+ −
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The two most common forms of composition are <b>Source</b> and <b>SourceOver</b>.+ −
<b>Source</b> is used to draw opaque objects onto a paint device. In this mode,+ −
each pixel in the source replaces the corresponding pixel in the destination.+ −
In <b>SourceOver</b> composition mode, the source object is transparent and is+ −
drawn on top of the destination.+ −
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In addition to these standard modes, Qt defines the complete set of composition+ −
modes as defined by Thomas Porter and Tom Duff. See the <tt>QPainter</tt> documentation+ −
for details.+ −
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