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    41 

    42 #ifndef QPIXMAPDATA_GL_P_H

    43 #define QPIXMAPDATA_GL_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists purely as an

    50 // implementation detail.  This header file may change from version to

    51 // version without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "qgl_p.h"

    57 #include "qgl.h"

    58 

    59 #include "private/qpixmapdata_p.h"

    60 #include "private/qglpaintdevice_p.h"

    61 

    62 QT_BEGIN_NAMESPACE

    63 

    64 class QPaintEngine;

    65 class QGLFramebufferObject;

    66 class QGLFramebufferObjectFormat;

    67 class QGLPixmapData;

    68 

    69 class QGLFramebufferObjectPool

    70 {

    71 public:

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

    73     void release(QGLFramebufferObject *fbo);

    74 

    75 private:

    76     QList<QGLFramebufferObject *> m_fbos;

    77 };

    78 

    79 QGLFramebufferObjectPool* qgl_fbo_pool();

    80 

    81 

    82 class QGLPixmapGLPaintDevice : public QGLPaintDevice

    83 {

    84 public:

    85     QPaintEngine* paintEngine() const;

    86 

    87     void beginPaint();

    88     void endPaint();

    89     QGLContext* context() const;

    90     QSize size() const;

    91     bool alphaRequested() const;

    92 

    93     void setPixmapData(QGLPixmapData*);

    94 private:

    95     QGLPixmapData *data;

    96 };

    97 

    98 

    99 class QGLPixmapData : public QPixmapData

   100 {

   101 public:

   102     QGLPixmapData(PixelType type);

   103     ~QGLPixmapData();

   104 

   105     QPixmapData *createCompatiblePixmapData() const;

   106 

   107     // Re-implemented from QPixmapData:

   108     void resize(int width, int height);

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

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

   111                   Qt::ImageConversionFlags flags);

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

   113                   Qt::ImageConversionFlags flags);

   114     void copy(const QPixmapData *data, const QRect &rect);

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

   116     void fill(const QColor &color);

   117     bool hasAlphaChannel() const;

   118     QImage toImage() const;

   119     QPaintEngine *paintEngine() const;

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

   121 

   122     // For accessing as a target:

   123     QGLPaintDevice *glDevice() const;

   124 

   125     // For accessing as a source:

   126     bool isValidContext(const QGLContext *ctx) const;

   127     GLuint bind(bool copyBack = true) const;

   128     QGLTexture *texture() const;

   129 

   130 private:

   131     bool isValid() const;

   132 

   133     void ensureCreated() const;

   134 

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

   136 

   137     bool needsFill() const { return m_hasFillColor; }

   138     QColor fillColor() const { return m_fillColor; }

   139 

   140 

   141 

   142     QGLPixmapData(const QGLPixmapData &other);

   143     QGLPixmapData &operator=(const QGLPixmapData &other);

   144 

   145     void copyBackFromRenderFbo(bool keepCurrentFboBound) const;

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

   147 

   148     static bool useFramebufferObjects();

   149 

   150     QImage fillImage(const QColor &color) const;

   151 

   152     mutable QGLFramebufferObject *m_renderFbo;

   153     mutable QPaintEngine *m_engine;

   154     mutable QGLContext *m_ctx;

   155     mutable QImage m_source;

   156     mutable QGLTexture m_texture;

   157 

   158     // the texture is not in sync with the source image

   159     mutable bool m_dirty;

   160 

   161     // fill has been called and no painting has been done, so the pixmap is

   162     // represented by a single fill color

   163     mutable QColor m_fillColor;

   164     mutable bool m_hasFillColor;

   165 

   166     mutable bool m_hasAlpha;

   167 

   168     mutable QGLPixmapGLPaintDevice m_glDevice;

   169 

   170     friend class QGLPixmapGLPaintDevice;

   171 };

   172 

   173 QT_END_NAMESPACE

   174 

   175 #endif // QPIXMAPDATA_GL_P_H

   176 

   177