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| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
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| ** |
| ** This file is part of the QtOpenGL module of the Qt Toolkit. |
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| ** rights. These rights are described in the Nokia Qt LGPL Exception |
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| ** GNU General Public License Usage |
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| ** file. Please review the following information to ensure the GNU General |
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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 Q_OPENGL_EXPORT QGLTextureGlyphCache : public QObject, public QImageTextureGlyphCache |
| { |
| 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 glyphPadding() const; |
| virtual int maxTextureWidth() const; |
| virtual int maxTextureHeight() 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; } |
| |
| inline int serialNumber() const { return m_serialNumber; } |
| |
| enum FilterMode { |
| Nearest, |
| Linear |
| }; |
| FilterMode filterMode() const { return m_filterMode; } |
| void setFilterMode(FilterMode m) { m_filterMode = m; } |
| |
| void setContext(QGLContext *context); |
| QGLContext *context() const { return ctx; } |
| |
| 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. We reset everything, so that the |
| // glyph cache object can be reused later by setting a new |
| // context on it. |
| m_fbo = 0; |
| m_texture = 0; |
| ctx = 0; |
| m_width = 0; |
| m_height = 0; |
| m_w = 0; |
| m_h = 0; |
| m_cx = 0; |
| m_cy = 0; |
| m_currentRowHeight = 0; |
| coords.clear(); |
| } 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); |
| } |
| } |
| } |
| |
| void clear(); |
| |
| private: |
| QGLContext *ctx; |
| |
| QGL2PaintEngineExPrivate *pex; |
| |
| GLuint m_texture; |
| GLuint m_fbo; |
| |
| int m_width; |
| int m_height; |
| |
| QGLShaderProgram *m_program; |
| |
| FilterMode m_filterMode; |
| int m_serialNumber; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| #endif |
| |