--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/demos/composition/composition.h	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,190 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef COMPOSITION_H
+#define COMPOSITION_H
+
+#include "arthurwidgets.h"
+
+#include <QPainter>
+#include <QEvent>
+
+QT_FORWARD_DECLARE_CLASS(QPushButton)
+QT_FORWARD_DECLARE_CLASS(QRadioButton)
+
+#ifdef QT_OPENGL_SUPPORT
+#include <QtOpenGL>
+#endif
+
+class CompositionWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    CompositionWidget(QWidget *parent);
+
+public slots:
+void nextMode();
+
+private:
+    bool m_cycle_enabled;
+
+    QRadioButton *rbClear;
+    QRadioButton *rbSource;
+    QRadioButton *rbDest;
+    QRadioButton *rbSourceOver;
+    QRadioButton *rbDestOver;
+    QRadioButton *rbSourceIn;
+    QRadioButton *rbDestIn;
+    QRadioButton *rbSourceOut;
+    QRadioButton *rbDestOut;
+    QRadioButton *rbSourceAtop;
+    QRadioButton *rbDestAtop;
+    QRadioButton *rbXor;
+
+    QRadioButton *rbPlus;
+    QRadioButton *rbMultiply;
+    QRadioButton *rbScreen;
+    QRadioButton *rbOverlay;
+    QRadioButton *rbDarken;
+    QRadioButton *rbLighten;
+    QRadioButton *rbColorDodge;
+    QRadioButton *rbColorBurn;
+    QRadioButton *rbHardLight;
+    QRadioButton *rbSoftLight;
+    QRadioButton *rbDifference;
+    QRadioButton *rbExclusion;
+};
+
+class CompositionRenderer : public ArthurFrame
+{
+    Q_OBJECT
+
+    enum ObjectType { NoObject, Circle, Rectangle, Image };
+
+    Q_PROPERTY(int circleColor READ circleColor WRITE setCircleColor)
+    Q_PROPERTY(int circleAlpha READ circleAlpha WRITE setCircleAlpha)
+    Q_PROPERTY(bool animation READ animationEnabled WRITE setAnimationEnabled)
+
+public:
+    CompositionRenderer(QWidget *parent);
+
+    void paint(QPainter *);
+
+    void mousePressEvent(QMouseEvent *);
+    void mouseMoveEvent(QMouseEvent *);
+    void mouseReleaseEvent(QMouseEvent *);
+
+    void setCirclePos(const QPointF &pos);
+
+    QSize sizeHint() const { return QSize(500, 400); }
+
+    bool animationEnabled() const { return m_animation_enabled; }
+    int circleColor() const { return m_circle_hue; }
+    int circleAlpha() const { return m_circle_alpha; }
+
+public slots:
+    void setClearMode() { m_composition_mode = QPainter::CompositionMode_Clear; update(); }
+    void setSourceMode() { m_composition_mode = QPainter::CompositionMode_Source; update(); }
+    void setDestMode() { m_composition_mode = QPainter::CompositionMode_Destination; update(); }
+    void setSourceOverMode() { m_composition_mode = QPainter::CompositionMode_SourceOver; update(); }
+    void setDestOverMode() { m_composition_mode = QPainter::CompositionMode_DestinationOver; update(); }
+    void setSourceInMode() { m_composition_mode = QPainter::CompositionMode_SourceIn; update(); }
+    void setDestInMode() { m_composition_mode = QPainter::CompositionMode_DestinationIn; update(); }
+    void setSourceOutMode() { m_composition_mode = QPainter::CompositionMode_SourceOut; update(); }
+    void setDestOutMode() { m_composition_mode = QPainter::CompositionMode_DestinationOut; update(); }
+    void setSourceAtopMode() { m_composition_mode = QPainter::CompositionMode_SourceAtop; update(); }
+    void setDestAtopMode() { m_composition_mode = QPainter::CompositionMode_DestinationAtop; update(); }
+    void setXorMode() { m_composition_mode = QPainter::CompositionMode_Xor; update(); }
+
+    void setPlusMode() { m_composition_mode = QPainter::CompositionMode_Plus; update(); }
+    void setMultiplyMode() { m_composition_mode = QPainter::CompositionMode_Multiply; update(); }
+    void setScreenMode() { m_composition_mode = QPainter::CompositionMode_Screen; update(); }
+    void setOverlayMode() { m_composition_mode = QPainter::CompositionMode_Overlay; update(); }
+    void setDarkenMode() { m_composition_mode = QPainter::CompositionMode_Darken; update(); }
+    void setLightenMode() { m_composition_mode = QPainter::CompositionMode_Lighten; update(); }
+    void setColorDodgeMode() { m_composition_mode = QPainter::CompositionMode_ColorDodge; update(); }
+    void setColorBurnMode() { m_composition_mode = QPainter::CompositionMode_ColorBurn; update(); }
+    void setHardLightMode() { m_composition_mode = QPainter::CompositionMode_HardLight; update(); }
+    void setSoftLightMode() { m_composition_mode = QPainter::CompositionMode_SoftLight; update(); }
+    void setDifferenceMode() { m_composition_mode = QPainter::CompositionMode_Difference; update(); }
+    void setExclusionMode() { m_composition_mode = QPainter::CompositionMode_Exclusion; update(); }
+
+    void setCircleAlpha(int alpha) { m_circle_alpha = alpha; update(); }
+    void setCircleColor(int hue) { m_circle_hue = hue; update(); }
+    void setAnimationEnabled(bool enabled) { m_animation_enabled = enabled; update(); }
+
+private:
+    void updateCirclePos();
+    void drawBase(QPainter &p);
+    void drawSource(QPainter &p);
+
+    QPainter::CompositionMode m_composition_mode;
+
+#ifdef Q_WS_QWS
+    QPixmap m_image;
+    QPixmap m_buffer;
+    QPixmap m_base_buffer;
+#else
+    QImage m_image;
+    QImage m_buffer;
+    QImage m_base_buffer;
+#endif
+
+    int m_circle_alpha;
+    int m_circle_hue;
+
+    QPointF m_circle_pos;
+    QPointF m_offset;
+
+    ObjectType m_current_object;
+    bool m_animation_enabled;
+
+#ifdef QT_OPENGL_SUPPORT
+    QGLPixelBuffer *m_pbuffer;
+    GLuint m_base_tex;
+    GLuint m_compositing_tex;
+    int m_pbuffer_size; // width==height==size of pbuffer
+    QSize m_previous_size;
+#endif
+};
+
+#endif // COMPOSITION_H