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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
++
++ /*!
++ \example painting/composition
++ \title Composition Modes
++ \examplecategory {Graphics}
++ \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
++ {Application that applies composition modes to image layers}
++
++ 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 T. Porter and T. Duff. See the QPainter documentation for details.
++ */