1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071 | // Copyright (C) 2016 The Qt Company Ltd.// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only#ifndef QOPENGLGRADIENTCACHE_P_H#define QOPENGLGRADIENTCACHE_P_H//// W A R N I N G// -------------//// This file is not part of the Qt API. It exists purely as an// implementation detail. This header file may change from version to// version without notice, or even be removed.//// We mean it.//#include <QMultiHash>#include <QObject>#include <private/qopenglcontext_p.h>#include <QtCore/qmutex.h>#include <QGradient>#include <qrgba64.h> QT_BEGIN_NAMESPACE class QOpenGL2GradientCache :public QOpenGLSharedResource {struct CacheInfo {inlineCacheInfo(QGradientStops s, qreal op,QGradient::InterpolationMode mode) :stops(std::move(s)),opacity(op),interpolationMode(mode) {} GLuint texId; QGradientStops stops; qreal opacity;QGradient::InterpolationMode interpolationMode;};typedef QMultiHash<quint64, CacheInfo> QOpenGLGradientColorTableHash;public:static QOpenGL2GradientCache *cacheForContext(QOpenGLContext *context);QOpenGL2GradientCache(QOpenGLContext *);~QOpenGL2GradientCache(); GLuint getBuffer(const QGradient &gradient, qreal opacity);inlineintpaletteSize()const{return1024; }voidinvalidateResource() override;voidfreeResource(QOpenGLContext *ctx) override;private:inlineintmaxCacheSize()const{return60; }inlinevoidgenerateGradientColorTable(const QGradient& gradient, QRgba64 *colorTable,int size, qreal opacity)const;inlinevoidgenerateGradientColorTable(const QGradient& gradient, uint *colorTable,int size, qreal opacity)const; GLuint addCacheElement(quint64 hash_val,const QGradient &gradient, qreal opacity);voidcleanCache(); QOpenGLGradientColorTableHash cache; QMutex m_mutex;}; QT_END_NAMESPACE #endif// QOPENGLGRADIENTCACHE_P_H
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