108 lines
3.9 KiB
C++
108 lines
3.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the QtOpenGL module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QOPENGLGRADIENTCACHE_P_H
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#define QOPENGLGRADIENTCACHE_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include <QMultiHash>
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#include <QObject>
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#include <private/qopenglcontext_p.h>
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#include <QtCore/qmutex.h>
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#include <QGradient>
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#include <qrgba64.h>
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QT_BEGIN_NAMESPACE
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class QOpenGL2GradientCache : public QOpenGLSharedResource
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{
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struct CacheInfo
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{
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inline CacheInfo(QGradientStops s, qreal op, QGradient::InterpolationMode mode) :
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stops(std::move(s)), opacity(op), interpolationMode(mode) {}
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GLuint texId;
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QGradientStops stops;
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qreal opacity;
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QGradient::InterpolationMode interpolationMode;
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};
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typedef QMultiHash<quint64, CacheInfo> QOpenGLGradientColorTableHash;
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public:
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static QOpenGL2GradientCache *cacheForContext(QOpenGLContext *context);
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QOpenGL2GradientCache(QOpenGLContext *);
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~QOpenGL2GradientCache();
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GLuint getBuffer(const QGradient &gradient, qreal opacity);
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inline int paletteSize() const { return 1024; }
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void invalidateResource() override;
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void freeResource(QOpenGLContext *ctx) override;
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private:
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inline int maxCacheSize() const { return 60; }
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inline void generateGradientColorTable(const QGradient& gradient,
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QRgba64 *colorTable,
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int size, qreal opacity) const;
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inline void generateGradientColorTable(const QGradient& gradient,
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uint *colorTable,
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int size, qreal opacity) const;
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GLuint addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity);
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void cleanCache();
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QOpenGLGradientColorTableHash cache;
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QMutex m_mutex;
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};
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QT_END_NAMESPACE
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#endif // QOPENGLGRADIENTCACHE_P_H
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