diff options
Diffstat (limited to 'src/opengl/gl2paintengineex/qglgradientcache_p.h')
-rw-r--r-- | src/opengl/gl2paintengineex/qglgradientcache_p.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/opengl/gl2paintengineex/qglgradientcache_p.h b/src/opengl/gl2paintengineex/qglgradientcache_p.h new file mode 100644 index 0000000000..d1d56a178a --- /dev/null +++ b/src/opengl/gl2paintengineex/qglgradientcache_p.h @@ -0,0 +1,98 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtOpenGL module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// 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 <QtOpenGL/QtOpenGL> +#include <private/qgl_p.h> +#include <QtCore/qmutex.h> + +QT_BEGIN_NAMESPACE + +class QGL2GradientCache +{ + struct CacheInfo + { + inline CacheInfo(QGradientStops s, qreal op, QGradient::InterpolationMode mode) : + stops(s), opacity(op), interpolationMode(mode) {} + + GLuint texId; + QGradientStops stops; + qreal opacity; + QGradient::InterpolationMode interpolationMode; + }; + + typedef QMultiHash<quint64, CacheInfo> QGLGradientColorTableHash; + +public: + static QGL2GradientCache *cacheForContext(const QGLContext *context); + + QGL2GradientCache(const QGLContext *) {} + ~QGL2GradientCache() { cleanCache(); } + + GLuint getBuffer(const QGradient &gradient, qreal opacity); + inline int paletteSize() const { return 1024; } + +private: + inline int maxCacheSize() const { return 60; } + inline void generateGradientColorTable(const QGradient& gradient, + uint *colorTable, + int size, qreal opacity) const; + GLuint addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity); + void cleanCache(); + + QGLGradientColorTableHash cache; + QMutex m_mutex; +}; + +QT_END_NAMESPACE + |