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    41 

    42 #ifndef QTEXTUREGLYPHCACHE_GL_P_H

    43 #define QTEXTUREGLYPHCACHE_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 for the convenience

    50 // of the QLibrary class.  This header file may change from

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

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include <private/qtextureglyphcache_p.h>

    57 #include <private/qgl_p.h>

    58 #include <qglshaderprogram.h>

    59 

    60 

    61 QT_BEGIN_NAMESPACE

    62 

    63 class QGL2PaintEngineExPrivate;

    64 

    65 class QGLTextureGlyphCache : public QObject, public QTextureGlyphCache

    66 {

    67     Q_OBJECT

    68 public:

    69     QGLTextureGlyphCache(QGLContext *context, QFontEngineGlyphCache::Type type, const QTransform &matrix);

    70     ~QGLTextureGlyphCache();

    71 

    72     virtual void createTextureData(int width, int height);

    73     virtual void resizeTextureData(int width, int height);

    74     virtual void fillTexture(const Coord &c, glyph_t glyph);

    75     virtual int glyphMargin() const;

    76 

    77     inline GLuint texture() const { return m_texture; }

    78 

    79     inline int width() const { return m_width; }

    80     inline int height() const { return m_height; }

    81 

    82     inline void setPaintEnginePrivate(QGL2PaintEngineExPrivate *p) { pex = p; }

    83 

    84 

    85 public Q_SLOTS:

    86     void contextDestroyed(const QGLContext *context) {

    87         if (context == ctx) {

    88             const QGLContext *nextCtx = qt_gl_transfer_context(ctx);

    89             if (!nextCtx) {

    90                 // the context may not be current, so we cannot directly

    91                 // destroy the fbo and texture here, but since the context

    92                 // is about to be destroyed, the GL server will do the

    93                 // clean up for us anyway

    94                 m_fbo = 0;

    95                 m_texture = 0;

    96                 ctx = 0;

    97             } else {

    98                 // since the context holding the texture is shared, and

    99                 // about to be destroyed, we have to transfer ownership

   100                 // of the texture to one of the share contexts

   101                 ctx = const_cast<QGLContext *>(nextCtx);

   102             }

   103         }

   104     }

   105 

   106 private:

   107     QGLContext *ctx;

   108 

   109     QGL2PaintEngineExPrivate *pex;

   110 

   111     GLuint m_texture;

   112     GLuint m_fbo;

   113 

   114     int m_width;

   115     int m_height;

   116 

   117     QGLShaderProgram *m_program;

   118 };

   119 

   120 QT_END_NAMESPACE

   121 

   122 #endif

   123