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| /*! |
| \example painting/composition |
| \title Composition Modes |
| \ingroup examples-painting |
| \brief Demonstrates how Composition Modes work in QPainter. |
| |
| \brief This demo shows some of the more advanced composition modes supported by Qt. |
| |
| \image composition-demo.png |
| |
| The two most common forms of composition are \b{Source} and \b{SourceOver}. |
| \b{Source} 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} composition mode, the source object is transparent and is |
| drawn on top of the destination. |
| |
| In addition to these standard modes, Qt defines the complete set of composition modes |
| as defined by X. Porter and Y. Duff. See the QPainter documentation for details. |
| */ |