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39 | |
40 | #ifndef QGLGRADIENTCACHE_P_H |
41 | #define QGLGRADIENTCACHE_P_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 <QMultiHash> |
55 | #include <QObject> |
56 | #include <QtOpenGL/QtOpenGL> |
57 | #include <private/qgl_p.h> |
58 | #include <QtCore/qmutex.h> |
59 | |
60 | QT_BEGIN_NAMESPACE |
61 | |
62 | class QGL2GradientCache : public QOpenGLSharedResource |
63 | { |
64 | struct CacheInfo |
65 | { |
66 | inline CacheInfo(QGradientStops s, qreal op, QGradient::InterpolationMode mode) : |
67 | stops(s), opacity(op), interpolationMode(mode) {} |
68 | |
69 | GLuint texId; |
70 | QGradientStops stops; |
71 | qreal opacity; |
72 | QGradient::InterpolationMode interpolationMode; |
73 | }; |
74 | |
75 | typedef QMultiHash<quint64, CacheInfo> QGLGradientColorTableHash; |
76 | |
77 | public: |
78 | static QGL2GradientCache *cacheForContext(const QGLContext *context); |
79 | |
80 | QGL2GradientCache(QOpenGLContext *); |
81 | ~QGL2GradientCache(); |
82 | |
83 | GLuint getBuffer(const QGradient &gradient, qreal opacity); |
84 | inline int paletteSize() const { return 1024; } |
85 | |
86 | void invalidateResource() override; |
87 | void freeResource(QOpenGLContext *ctx) override; |
88 | |
89 | private: |
90 | inline int maxCacheSize() const { return 60; } |
91 | inline void generateGradientColorTable(const QGradient& gradient, |
92 | uint *colorTable, |
93 | int size, qreal opacity) const; |
94 | GLuint addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity); |
95 | void cleanCache(); |
96 | |
97 | QGLGradientColorTableHash cache; |
98 | QMutex m_mutex; |
99 | }; |
100 | |
101 | QT_END_NAMESPACE |
102 | |
103 | #endif // QGLGRADIENTCACHE_P_H |
104 | |