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Last change
on this file since 918 was 2, checked in by Dmitry A. Kuminov, 16 years ago |
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Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
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File size:
711 bytes
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| 1 | <html>
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| 2 |
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| 3 | <h1>Demo for composition modes</h1>
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| 4 |
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| 5 | <p>
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| 6 | This demo shows some of the more advanced composition modes supported by Qt.
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| 7 | </p>
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| 8 |
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| 9 | <p>
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| 10 | The two most common forms of composition are <b>Source</b> and <b>SourceOver</b>.
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| 11 | <b>Source</b> is used to draw opaque objects onto a paint device. In this mode,
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| 12 | each pixel in the source replaces the corresponding pixel in the destination.
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| 13 | In <b>SourceOver</b> composition mode, the source object is transparent and is
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| 14 | drawn on top of the destination.
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| 15 | </p>
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| 16 |
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| 17 | <p>
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| 18 | In addition to these standard modes, Qt defines the complete set of composition
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| 19 | modes as defined by Thomas Porter and Tom Duff. See the <tt>QPainter</tt> documentation
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| 20 | for details.
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| 21 | </p>
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| 22 |
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| 23 | </html>
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