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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> |