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#ifndef QTEXTUREGLYPHCACHE_GL_P_H

#define QTEXTUREGLYPHCACHE_GL_P_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists for the convenience

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

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

//

// We mean it.

//

#include <private/qtextureglyphcache_p.h>

#include <private/qgl_p.h>

#include <qglshaderprogram.h>

QT_BEGIN_NAMESPACE

class QGL2PaintEngineExPrivate;

class QGLTextureGlyphCache : public QObject, public QTextureGlyphCache

{

    Q_OBJECT

public:

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

    ~QGLTextureGlyphCache();

    virtual void createTextureData(int width, int height);

    virtual void resizeTextureData(int width, int height);

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

    virtual int glyphMargin() const;

    inline GLuint texture() const { return m_texture; }

    inline int width() const { return m_width; }

    inline int height() const { return m_height; }

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

public Q_SLOTS:

    void contextDestroyed(const QGLContext *context) {

        if (context == ctx) {

            const QGLContext *nextCtx = qt_gl_transfer_context(ctx);

            if (!nextCtx) {

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

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

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

                // clean up for us anyway

                m_fbo = 0;

                m_texture = 0;

                ctx = 0;

            } else {

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

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

                // of the texture to one of the share contexts

                ctx = const_cast<QGLContext *>(nextCtx);

            }

        }

    }

private:

    QGLContext *ctx;

    QGL2PaintEngineExPrivate *pex;

    GLuint m_texture;

    GLuint m_fbo;

    int m_width;

    int m_height;

    QGLShaderProgram *m_program;

};

QT_END_NAMESPACE

#endif