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

**

** 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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** No Commercial Usage

** This file contains pre-release code and may not be distributed.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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** GNU Lesser General Public License Usage

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** 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

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** $QT_END_LICENSE$

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

#ifndef QGLPIXELBUFFER_H

#define QGLPIXELBUFFER_H

#include <QtOpenGL/qgl.h>

#include <QtGui/qpaintdevice.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

QT_MODULE(OpenGL)

class QGLPixelBufferPrivate;

class Q_OPENGL_EXPORT QGLPixelBuffer : public QPaintDevice

{

    Q_DECLARE_PRIVATE(QGLPixelBuffer)

public:

    QGLPixelBuffer(const QSize &size, const QGLFormat &format = QGLFormat::defaultFormat(),

                   QGLWidget *shareWidget = 0);

    QGLPixelBuffer(int width, int height, const QGLFormat &format = QGLFormat::defaultFormat(),

                   QGLWidget *shareWidget = 0);

    virtual ~QGLPixelBuffer();

    bool isValid() const;

    bool makeCurrent();

    bool doneCurrent();

    GLuint generateDynamicTexture() const;

    bool bindToDynamicTexture(GLuint texture);

    void releaseFromDynamicTexture();

    void updateDynamicTexture(GLuint texture_id) const;

    GLuint bindTexture(const QImage &image, GLenum target = GL_TEXTURE_2D);

    GLuint bindTexture(const QPixmap &pixmap, GLenum target = GL_TEXTURE_2D);

    GLuint bindTexture(const QString &fileName);

    void deleteTexture(GLuint texture_id);

    void drawTexture(const QRectF &target, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);

    void drawTexture(const QPointF &point, GLuint textureId, GLenum textureTarget = GL_TEXTURE_2D);

#ifdef Q_MAC_COMPAT_GL_FUNCTIONS

    bool bindToDynamicTexture(QMacCompatGLuint texture);

    void updateDynamicTexture(QMacCompatGLuint texture_id) const;

    GLuint bindTexture(const QImage &image, QMacCompatGLenum target = GL_TEXTURE_2D);

    GLuint bindTexture(const QPixmap &pixmap, QMacCompatGLenum target = GL_TEXTURE_2D);

    void drawTexture(const QRectF &target, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget = GL_TEXTURE_2D);

    void drawTexture(const QPointF &point, QMacCompatGLuint textureId, QMacCompatGLenum textureTarget = GL_TEXTURE_2D);

    void deleteTexture(QMacCompatGLuint texture_id);

#endif

    QSize size() const;

    Qt::HANDLE handle() const;

    QImage toImage() const;

    QPaintEngine *paintEngine() const;

    QGLFormat format() const;

    static bool hasOpenGLPbuffers();

protected:

    int metric(PaintDeviceMetric metric) const;

    int devType() const { return QInternal::Pbuffer; }

private:

    Q_DISABLE_COPY(QGLPixelBuffer)

    QScopedPointer<QGLPixelBufferPrivate> d_ptr;

    friend class QGLDrawable;

    friend class QGLWindowSurface;

    friend class QGLPaintDevice;

    friend class QGLPBufferGLPaintDevice;

};

QT_END_NAMESPACE

QT_END_HEADER

#endif // QGLPIXELBUFFER_H