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****************************************************************************/

#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 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; }

protected:

    void mousePressEvent(QMouseEvent *);

    void mouseMoveEvent(QMouseEvent *);

    void mouseReleaseEvent(QMouseEvent *);

    void timerEvent(QTimerEvent *);

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);

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;

    int m_animationTimer;

#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