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42 #ifndef QSGDEFAULTDISTANCEFIELDGLYPHCACHE_H
43 #define QSGDEFAULTDISTANCEFIELDGLYPHCACHE_H
45 #include "qsgadaptationlayer_p.h"
46 #include <QtGui/qopenglfunctions.h>
47 #include <qopenglshaderprogram.h>
48 #include <QtGui/private/qopenglengineshadersource_p.h>
49 #include <private/qsgareaallocator_p.h>
53 class QOpenGLSharedResourceGuard;
54 class Q_QUICK_PRIVATE_EXPORT QSGDefaultDistanceFieldGlyphCache : public QSGDistanceFieldGlyphCache
57 QSGDefaultDistanceFieldGlyphCache(QSGDistanceFieldGlyphCacheManager *man, QOpenGLContext *c, const QRawFont &font);
58 virtual ~QSGDefaultDistanceFieldGlyphCache();
60 void requestGlyphs(const QSet<glyph_t> &glyphs);
61 void storeGlyphs(const QHash<glyph_t, QImage> &glyphs);
62 void referenceGlyphs(const QSet<glyph_t> &glyphs);
63 void releaseGlyphs(const QSet<glyph_t> &glyphs);
65 bool useWorkaroundBrokenFBOReadback() const;
66 int maxTextureSize() const;
68 void setMaxTextureCount(int max) { m_maxTextureCount = max; }
69 int maxTextureCount() const { return m_maxTextureCount; }
78 TextureInfo() : texture(0)
82 void createTexture(TextureInfo * texInfo, int width, int height);
83 void resizeTexture(TextureInfo * texInfo, int width, int height);
85 TextureInfo *textureInfo(int index)
87 for (int i = m_textures.count(); i <= index; ++i)
88 m_textures.append(TextureInfo());
90 return &m_textures[index];
93 void createBlitProgram()
95 m_blitProgram = new QOpenGLShaderProgram;
98 source.append(QLatin1String(qopenglslMainWithTexCoordsVertexShader));
99 source.append(QLatin1String(qopenglslUntransformedPositionVertexShader));
101 QOpenGLShader *vertexShader = new QOpenGLShader(QOpenGLShader::Vertex, m_blitProgram);
102 vertexShader->compileSourceCode(source);
104 m_blitProgram->addShader(vertexShader);
108 source.append(QLatin1String(qopenglslMainFragmentShader));
109 source.append(QLatin1String(qopenglslImageSrcFragmentShader));
111 QOpenGLShader *fragmentShader = new QOpenGLShader(QOpenGLShader::Fragment, m_blitProgram);
112 fragmentShader->compileSourceCode(source);
114 m_blitProgram->addShader(fragmentShader);
116 m_blitProgram->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
117 m_blitProgram->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
118 m_blitProgram->link();
121 mutable int m_maxTextureSize;
122 int m_maxTextureCount;
124 QList<TextureInfo> m_textures;
125 QHash<glyph_t, TextureInfo *> m_glyphsTexture;
126 QSet<glyph_t> m_unusedGlyphs;
128 QSGAreaAllocator *m_areaAllocator;
130 QOpenGLShaderProgram *m_blitProgram;
131 GLfloat m_blitVertexCoordinateArray[8];
132 GLfloat m_blitTextureCoordinateArray[8];
134 QOpenGLSharedResourceGuard *m_fboGuard;
139 #endif // QSGDEFAULTDISTANCEFIELDGLYPHCACHE_H