/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the QtOpenGL module of the Qt Toolkit.
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#ifndef QPIXMAPDATA_GL_P_H
#define QPIXMAPDATA_GL_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qgl_p.h"
#include "qgl.h"

#include "private/qpixmapdata_p.h"

QT_BEGIN_NAMESPACE

class QPaintEngine;
class QGLFramebufferObject;

class QGLPixmapData : public QPixmapData
{
public:
    QGLPixmapData(PixelType type);
    ~QGLPixmapData();

    bool isValid() const;

    void resize(int width, int height);
    void fromImage(const QImage &image,
                   Qt::ImageConversionFlags flags);
    void copy(const QPixmapData *data, const QRect &rect);

    bool scroll(int dx, int dy, const QRect &rect);

    void fill(const QColor &color);
    bool hasAlphaChannel() const;
    QImage toImage() const;
    QPaintEngine *paintEngine() const;

    GLuint bind(bool copyBack = true) const;
    GLuint textureId() const;
    QGLTexture *texture() const;

    bool isValidContext(const QGLContext *ctx) const;

    void ensureCreated() const;

    bool isUninitialized() const { return m_dirty && m_source.isNull(); }

    bool needsFill() const { return m_hasFillColor; }
    QColor fillColor() const { return m_fillColor; }

    QSize size() const { return QSize(w, h); }

    QGLFramebufferObject *fbo() const;

    void makeCurrent();
    void doneCurrent();
    void swapBuffers();

protected:
    int metric(QPaintDevice::PaintDeviceMetric metric) const;

private:
    QGLPixmapData(const QGLPixmapData &other);
    QGLPixmapData &operator=(const QGLPixmapData &other);

    void copyBackFromRenderFbo(bool keepCurrentFboBound) const;

    static bool useFramebufferObjects();

    QImage fillImage(const QColor &color) const;

    mutable QGLFramebufferObject *m_renderFbo;
    mutable QPaintEngine *m_engine;
    mutable QGLContext *m_ctx;
    mutable QImage m_source;
    mutable QGLTexture m_texture;

    // the texture is not in sync with the source image
    mutable bool m_dirty;

    // fill has been called and no painting has been done, so the pixmap is
    // represented by a single fill color
    mutable QColor m_fillColor;
    mutable bool m_hasFillColor;

    mutable bool m_hasAlpha;
};

QT_END_NAMESPACE

#endif // QPIXMAPDATA_GL_P_H