| author | eckhart.koppen@nokia.com |
| Wed, 31 Mar 2010 11:06:36 +0300 | |
| changeset 7 | f7bc934e204c |
| permissions | -rw-r--r-- |
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eckhart.koppen@nokia.com
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<html> |
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<h1>Demo for composition modes</h1> |
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<p> |
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eckhart.koppen@nokia.com
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This demo shows some of the more advanced composition modes supported by Qt. |
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</p> |
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f7bc934e204c
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eckhart.koppen@nokia.com
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f7bc934e204c
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eckhart.koppen@nokia.com
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<p> |
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eckhart.koppen@nokia.com
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The two most common forms of composition are <b>Source</b> and <b>SourceOver</b>. |
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eckhart.koppen@nokia.com
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<b>Source</b> is used to draw opaque objects onto a paint device. In this mode, |
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eckhart.koppen@nokia.com
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each pixel in the source replaces the corresponding pixel in the destination. |
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eckhart.koppen@nokia.com
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In <b>SourceOver</b> composition mode, the source object is transparent and is |
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eckhart.koppen@nokia.com
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drawn on top of the destination. |
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eckhart.koppen@nokia.com
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</p> |
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<p> |
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In addition to these standard modes, Qt defines the complete set of composition |
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eckhart.koppen@nokia.com
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modes as defined by Thomas Porter and Tom Duff. See the <tt>QPainter</tt> documentation |
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eckhart.koppen@nokia.com
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for details. |
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</p> |
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</html> |