| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QOPENGLGRADIENTCACHE_P_H |
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| 5 | #define QOPENGLGRADIENTCACHE_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QMultiHash> |
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| 19 | #include <QObject> |
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| 20 | #include <private/qopenglcontext_p.h> |
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| 21 | #include <QtCore/qmutex.h> |
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| 22 | #include <QGradient> |
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| 23 | #include <qrgba64.h> |
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| 24 | |
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| 25 | QT_BEGIN_NAMESPACE |
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| 26 | |
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| 27 | class QOpenGL2GradientCache : public QOpenGLSharedResource |
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| 28 | { |
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| 29 | struct CacheInfo |
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| 30 | { |
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| 31 | inline CacheInfo(QGradientStops s, qreal op, QGradient::InterpolationMode mode) : |
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| 32 | stops(std::move(s)), opacity(op), interpolationMode(mode) {} |
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| 33 | |
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| 34 | GLuint texId; |
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| 35 | QGradientStops stops; |
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| 36 | qreal opacity; |
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| 37 | QGradient::InterpolationMode interpolationMode; |
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| 38 | }; |
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| 39 | |
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| 40 | typedef QMultiHash<quint64, CacheInfo> QOpenGLGradientColorTableHash; |
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| 41 | |
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| 42 | public: |
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| 43 | static QOpenGL2GradientCache *cacheForContext(QOpenGLContext *context); |
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| 44 | |
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| 45 | QOpenGL2GradientCache(QOpenGLContext *); |
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| 46 | ~QOpenGL2GradientCache(); |
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| 47 | |
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| 48 | GLuint getBuffer(const QGradient &gradient, qreal opacity); |
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| 49 | inline int paletteSize() const { return 1024; } |
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| 50 | |
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| 51 | void invalidateResource() override; |
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| 52 | void freeResource(QOpenGLContext *ctx) override; |
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| 53 | |
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| 54 | private: |
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| 55 | inline int maxCacheSize() const { return 60; } |
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| 56 | inline void generateGradientColorTable(const QGradient& gradient, |
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| 57 | QRgba64 *colorTable, |
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| 58 | int size, qreal opacity) const; |
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| 59 | inline void generateGradientColorTable(const QGradient& gradient, |
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| 60 | uint *colorTable, |
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| 61 | int size, qreal opacity) const; |
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| 62 | GLuint addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity); |
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| 63 | void cleanCache(); |
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| 64 | |
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| 65 | QOpenGLGradientColorTableHash cache; |
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| 66 | QMutex m_mutex; |
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| 67 | }; |
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| 68 | |
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| 69 | QT_END_NAMESPACE |
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| 70 | |
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| 71 | #endif // QOPENGLGRADIENTCACHE_P_H |
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| 72 | |
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