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

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtOpenGL module 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 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"

#include "private/qglpaintdevice_p.h"

QT_BEGIN_NAMESPACE

class QPaintEngine;

class QGLFramebufferObject;

class QGLFramebufferObjectFormat;

class QGLPixmapData;

class QGLFramebufferObjectPool

{

public:

    QGLFramebufferObject *acquire(const QSize &size, const QGLFramebufferObjectFormat &format, bool strictSize = false);

    void release(QGLFramebufferObject *fbo);

private:

    QList<QGLFramebufferObject *> m_fbos;

};

QGLFramebufferObjectPool* qgl_fbo_pool();

class QGLPixmapGLPaintDevice : public QGLPaintDevice

{

public:

    QPaintEngine* paintEngine() const;

    void beginPaint();

    void endPaint();

    QGLContext* context() const;

    QSize size() const;

    bool alphaRequested() const;

    void setPixmapData(QGLPixmapData*);

private:

    QGLPixmapData *data;

};

class QGLPixmapData : public QPixmapData

{

public:

    QGLPixmapData(PixelType type);

    ~QGLPixmapData();

    QPixmapData *createCompatiblePixmapData() const;

    // Re-implemented from QPixmapData:

    void resize(int width, int height);

    void fromImage(const QImage &image, Qt::ImageConversionFlags flags);

    bool fromFile(const QString &filename, const char *format,

                  Qt::ImageConversionFlags flags);

    bool fromData(const uchar *buffer, uint len, const char *format,

                  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;

    int metric(QPaintDevice::PaintDeviceMetric metric) const;

    // For accessing as a target:

    QGLPaintDevice *glDevice() const;

    // For accessing as a source:

    bool isValidContext(const QGLContext *ctx) const;

    GLuint bind(bool copyBack = true) const;

    QGLTexture *texture() const;

private:

    bool isValid() 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; }

    QGLPixmapData(const QGLPixmapData &other);

    QGLPixmapData &operator=(const QGLPixmapData &other);

    void copyBackFromRenderFbo(bool keepCurrentFboBound) const;

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

    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;

    mutable QGLPixmapGLPaintDevice m_glDevice;

    friend class QGLPixmapGLPaintDevice;

};

QT_END_NAMESPACE

#endif // QPIXMAPDATA_GL_P_H