text: /****************************************************************************
  **
  ** Copyright (C) 2011 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.
  **
  ** $QT_BEGIN_LICENSE:LGPL$
  ** GNU Lesser General Public License Usage
  ** 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.
  **
  ** GNU General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU General
  ** Public License version 3.0 as published by the Free Software Foundation
  ** and appearing in the file LICENSE.GPL included in the packaging of this
  ** file. Please review the following information to ensure the GNU General
  ** Public License version 3.0 requirements will be met:
  ** http://www.gnu.org/copyleft/gpl.html.
  **
  ** Other Usage
  ** Alternatively, this file may be used in accordance with the terms and
  ** conditions contained in a signed written agreement between you and Nokia.
  **
  **
  **
  **
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #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"
  
  #ifdef Q_OS_SYMBIAN
  #include "private/qvolatileimage_p.h"
  #ifdef QT_SYMBIAN_SUPPORTS_SGIMAGE
  #  include <sgresource/sgimage.h>
  #endif
  #endif
  
  QT_BEGIN_NAMESPACE
  
  class QPaintEngine;
  class QGLFramebufferObject;
  class QGLFramebufferObjectFormat;
  class QGLPixmapData;
  
  #ifdef Q_OS_SYMBIAN
  class QNativeImageHandleProvider;
  #else
  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;
  };
  #endif
  
  class Q_OPENGL_EXPORT 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);
      void fromImageReader(QImageReader *imageReader,
                            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;
  
  #ifdef Q_OS_SYMBIAN
      void destroyTexture();
      // Detach this image from the image pool.
      void detachTextureFromPool();
      // Release the GL resources associated with this pixmap and copy
      // the pixmap's contents out of the GPU back into main memory.
      // The GL resource will be automatically recreated the next time
      // ensureCreated() is called.  Does nothing if the pixmap cannot be
      // hibernated for some reason (e.g. texture is shared with another
      // process via a SgImage).
      void hibernate();
      // Called when the QGLTexturePool wants to reclaim this pixmap's
      // texture objects to reuse storage.
      void reclaimTexture();
      void forceToImage();
  
      QVolatileImage toVolatileImage() const { return m_source; }
      QImage::Format idealFormat(QImage &image, Qt::ImageConversionFlags flags);
      void* toNativeType(NativeType type);
      void fromNativeType(void* pixmap, NativeType type);
      bool initFromNativeImageHandle(void *handle, const QString &type);
      void createFromNativeImageHandleProvider();
      void releaseNativeImageHandle();
  #endif
  
  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); }
  
      bool useFramebufferObjects() const;
  
      QImage fillImage(const QColor &color) const;
  
      void createPixmapForImage(QImage &image, Qt::ImageConversionFlags flags, bool inPlace);
  
      mutable QGLFramebufferObject *m_renderFbo;
      mutable QPaintEngine *m_engine;
      mutable QGLContext *m_ctx;
  #ifdef Q_OS_SYMBIAN
      mutable QVolatileImage m_source;
      mutable QNativeImageHandleProvider *nativeImageHandleProvider;
      void *nativeImageHandle;
      QString nativeImageType;
  #ifdef QT_SYMBIAN_SUPPORTS_SGIMAGE
      RSgImage *m_sgImage;
  #endif
  #else
      mutable QImage m_source;
  #endif
      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;
  #ifndef Q_OS_SYMBIAN
      mutable QGLPixmapGLPaintDevice m_glDevice;
  #endif
      friend class QGLPixmapGLPaintDevice;
      friend class QMeeGoPixmapData;
      friend class QMeeGoLivePixmapData;
  };
  
  QT_END_NAMESPACE
  
  #endif // QPIXMAPDATA_GL_P_H
  
  
  