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39 | |
40 | #ifndef QSGOPENGLDISTANCEFIELDGLYPHCACHE_H |
41 | #define QSGOPENGLDISTANCEFIELDGLYPHCACHE_H |
42 | |
43 | // |
44 | // W A R N I N G |
45 | // ------------- |
46 | // |
47 | // This file is not part of the Qt API. It exists purely as an |
48 | // implementation detail. This header file may change from version to |
49 | // version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | |
54 | #include "qsgadaptationlayer_p.h" |
55 | #include <QtGui/qopenglfunctions.h> |
56 | #include <qopenglshaderprogram.h> |
57 | #include <qopenglbuffer.h> |
58 | #include <qopenglvertexarrayobject.h> |
59 | #include <QtGui/private/qopenglengineshadersource_p.h> |
60 | #include <private/qsgareaallocator_p.h> |
61 | |
62 | QT_BEGIN_NAMESPACE |
63 | |
64 | class QOpenGLSharedResourceGuard; |
65 | #if !defined(QT_OPENGL_ES_2) |
66 | class QOpenGLFunctions_3_2_Core; |
67 | #endif |
68 | |
69 | class Q_QUICK_PRIVATE_EXPORT QSGOpenGLDistanceFieldGlyphCache : public QSGDistanceFieldGlyphCache |
70 | { |
71 | public: |
72 | QSGOpenGLDistanceFieldGlyphCache(QOpenGLContext *c, const QRawFont &font); |
73 | virtual ~QSGOpenGLDistanceFieldGlyphCache(); |
74 | |
75 | void requestGlyphs(const QSet<glyph_t> &glyphs) override; |
76 | void storeGlyphs(const QList<QDistanceField> &glyphs) override; |
77 | void referenceGlyphs(const QSet<glyph_t> &glyphs) override; |
78 | void releaseGlyphs(const QSet<glyph_t> &glyphs) override; |
79 | |
80 | bool useTextureResizeWorkaround() const; |
81 | bool useTextureUploadWorkaround() const; |
82 | bool createFullSizeTextures() const; |
83 | |
84 | void setMaxTextureCount(int max) { m_maxTextureCount = max; } |
85 | int maxTextureCount() const { return m_maxTextureCount; } |
86 | |
87 | bool eightBitFormatIsAlphaSwizzled() const override { return !m_coreProfile; } |
88 | |
89 | private: |
90 | bool loadPregeneratedCache(const QRawFont &font); |
91 | inline bool isCoreProfile() const { return m_coreProfile; } |
92 | |
93 | struct TextureInfo { |
94 | GLuint texture; |
95 | QSize size; |
96 | QRect allocatedArea; |
97 | QDistanceField image; |
98 | int padding = -1; |
99 | |
100 | TextureInfo(const QRect &preallocRect = QRect(0, 0, 1, 1)) : texture(0), allocatedArea(preallocRect) { } |
101 | }; |
102 | |
103 | void createTexture(TextureInfo * texInfo, int width, int height, const void *pixels); |
104 | void createTexture(TextureInfo * texInfo, int width, int height); |
105 | void resizeTexture(TextureInfo * texInfo, int width, int height); |
106 | |
107 | TextureInfo *textureInfo(int index) |
108 | { |
109 | Q_ASSERT(m_maxTextureWidth > 0 && m_maxTextureHeight > 0); |
110 | for (int i = m_textures.count(); i <= index; ++i) { |
111 | if (createFullSizeTextures()) |
112 | m_textures.append(t: QRect(0, 0, m_maxTextureWidth, m_maxTextureWidth)); |
113 | else |
114 | m_textures.append(t: TextureInfo()); |
115 | } |
116 | |
117 | return &m_textures[index]; |
118 | } |
119 | |
120 | void createBlitProgram() |
121 | { |
122 | m_blitProgram = new QOpenGLShaderProgram; |
123 | { |
124 | const QString source = QLatin1String(qopenglslMainWithTexCoordsVertexShader) |
125 | + QLatin1String(qopenglslUntransformedPositionVertexShader); |
126 | |
127 | m_blitProgram->addCacheableShaderFromSourceCode(type: QOpenGLShader::Vertex, source); |
128 | } |
129 | { |
130 | const QString source = QLatin1String(qopenglslMainFragmentShader) |
131 | + QLatin1String(qopenglslImageSrcFragmentShader); |
132 | |
133 | m_blitProgram->addCacheableShaderFromSourceCode(type: QOpenGLShader::Fragment, source); |
134 | } |
135 | m_blitProgram->bindAttributeLocation(name: "vertexCoordsArray" , location: QT_VERTEX_COORDS_ATTR); |
136 | m_blitProgram->bindAttributeLocation(name: "textureCoordArray" , location: QT_TEXTURE_COORDS_ATTR); |
137 | m_blitProgram->link(); |
138 | } |
139 | |
140 | int m_maxTextureWidth; |
141 | int m_maxTextureHeight; |
142 | int m_maxTextureCount; |
143 | bool m_coreProfile; |
144 | |
145 | QList<TextureInfo> m_textures; |
146 | QHash<glyph_t, TextureInfo *> m_glyphsTexture; |
147 | QSet<glyph_t> m_unusedGlyphs; |
148 | |
149 | QSGAreaAllocator *m_areaAllocator; |
150 | |
151 | QOpenGLShaderProgram *m_blitProgram; |
152 | QOpenGLBuffer m_blitBuffer; |
153 | QOpenGLVertexArrayObject m_vao; |
154 | |
155 | QOpenGLSharedResourceGuard *m_fboGuard; |
156 | QOpenGLFunctions *m_funcs; |
157 | #if !defined(QT_OPENGL_ES_2) |
158 | QOpenGLFunctions_3_2_Core *m_coreFuncs; |
159 | #endif |
160 | }; |
161 | |
162 | QT_END_NAMESPACE |
163 | |
164 | #endif // QSGOPENGLDISTANCEFIELDGLYPHCACHE_H |
165 | |