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Diffstat (limited to 'src/opengl/qopengltexturecache.cpp')
| -rw-r--r-- | src/opengl/qopengltexturecache.cpp | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/opengl/qopengltexturecache.cpp b/src/opengl/qopengltexturecache.cpp new file mode 100644 index 0000000000..5256c429e0 --- /dev/null +++ b/src/opengl/qopengltexturecache.cpp @@ -0,0 +1,198 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtOpenGL module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qopengltexturecache_p.h" +#include <private/qopengltextureuploader_p.h> +#include <qmath.h> +#include <qopenglfunctions.h> +#include <private/qimagepixmapcleanuphooks_p.h> +#include <qpa/qplatformpixmap.h> + +QT_BEGIN_NAMESPACE + +class QOpenGLTextureCacheWrapper +{ +public: + QOpenGLTextureCacheWrapper() + { + QImagePixmapCleanupHooks::instance()->addPlatformPixmapModificationHook(cleanupTexturesForPixmapData); + QImagePixmapCleanupHooks::instance()->addPlatformPixmapDestructionHook(cleanupTexturesForPixmapData); + QImagePixmapCleanupHooks::instance()->addImageHook(cleanupTexturesForCacheKey); + } + + ~QOpenGLTextureCacheWrapper() + { + QImagePixmapCleanupHooks::instance()->removePlatformPixmapModificationHook(cleanupTexturesForPixmapData); + QImagePixmapCleanupHooks::instance()->removePlatformPixmapDestructionHook(cleanupTexturesForPixmapData); + QImagePixmapCleanupHooks::instance()->removeImageHook(cleanupTexturesForCacheKey); + } + + QOpenGLTextureCache *cacheForContext(QOpenGLContext *context) { + QMutexLocker lock(&m_mutex); + return m_resource.value<QOpenGLTextureCache>(context); + } + + static void cleanupTexturesForCacheKey(qint64 key); + static void cleanupTexturesForPixmapData(QPlatformPixmap *pmd); + +private: + QOpenGLMultiGroupSharedResource m_resource; + QMutex m_mutex; +}; + +Q_GLOBAL_STATIC(QOpenGLTextureCacheWrapper, qt_texture_caches) + +QOpenGLTextureCache *QOpenGLTextureCache::cacheForContext(QOpenGLContext *context) +{ + return qt_texture_caches()->cacheForContext(context); +} + +void QOpenGLTextureCacheWrapper::cleanupTexturesForCacheKey(qint64 key) +{ + QList<QOpenGLSharedResource *> resources = qt_texture_caches()->m_resource.resources(); + for (QList<QOpenGLSharedResource *>::iterator it = resources.begin(); it != resources.end(); ++it) + static_cast<QOpenGLTextureCache *>(*it)->invalidate(key); +} + +void QOpenGLTextureCacheWrapper::cleanupTexturesForPixmapData(QPlatformPixmap *pmd) +{ + cleanupTexturesForCacheKey(pmd->cacheKey()); +} + +QOpenGLTextureCache::QOpenGLTextureCache(QOpenGLContext *ctx) + : QOpenGLSharedResource(ctx->shareGroup()) + , m_cache(256 * 1024) // 256 MB cache +{ +} + +QOpenGLTextureCache::~QOpenGLTextureCache() +{ +} + +GLuint QOpenGLTextureCache::bindTexture(QOpenGLContext *context, const QPixmap &pixmap, QOpenGLTextureUploader::BindOptions options) +{ + if (pixmap.isNull()) + return 0; + QMutexLocker locker(&m_mutex); + qint64 key = pixmap.cacheKey(); + + // A QPainter is active on the image - take the safe route and replace the texture. + if (!pixmap.paintingActive()) { + QOpenGLCachedTexture *entry = m_cache.object(key); + if (entry && entry->options() == options) { + context->functions()->glBindTexture(GL_TEXTURE_2D, entry->id()); + return entry->id(); + } + } + + GLuint id = bindTexture(context, key, pixmap.toImage(), options); + if (id > 0) + QImagePixmapCleanupHooks::enableCleanupHooks(pixmap); + + return id; +} + +GLuint QOpenGLTextureCache::bindTexture(QOpenGLContext *context, const QImage &image, QOpenGLTextureUploader::BindOptions options) +{ + if (image.isNull()) + return 0; + QMutexLocker locker(&m_mutex); + qint64 key = image.cacheKey(); + + // A QPainter is active on the image - take the safe route and replace the texture. + if (!image.paintingActive()) { + QOpenGLCachedTexture *entry = m_cache.object(key); + if (entry && entry->options() == options) { + context->functions()->glBindTexture(GL_TEXTURE_2D, entry->id()); + return entry->id(); + } + } + + QImage img = image; + if (!context->functions()->hasOpenGLFeature(QOpenGLFunctions::NPOTTextures)) + options |= QOpenGLTextureUploader::PowerOfTwoBindOption; + + GLuint id = bindTexture(context, key, img, options); + if (id > 0) + QImagePixmapCleanupHooks::enableCleanupHooks(image); + + return id; +} + +GLuint QOpenGLTextureCache::bindTexture(QOpenGLContext *context, qint64 key, const QImage &image, QOpenGLTextureUploader::BindOptions options) +{ + GLuint id; + QOpenGLFunctions *funcs = context->functions(); + funcs->glGenTextures(1, &id); + funcs->glBindTexture(GL_TEXTURE_2D, id); + + int cost = QOpenGLTextureUploader::textureImage(GL_TEXTURE_2D, image, options); + + m_cache.insert(key, new QOpenGLCachedTexture(id, options, context), cost / 1024); + + return id; +} + +void QOpenGLTextureCache::invalidate(qint64 key) +{ + QMutexLocker locker(&m_mutex); + m_cache.remove(key); +} + +void QOpenGLTextureCache::invalidateResource() +{ + m_cache.clear(); +} + +void QOpenGLTextureCache::freeResource(QOpenGLContext *) +{ + Q_ASSERT(false); // the texture cache lives until the context group disappears +} + +static void freeTexture(QOpenGLFunctions *funcs, GLuint id) +{ + funcs->glDeleteTextures(1, &id); +} + +QOpenGLCachedTexture::QOpenGLCachedTexture(GLuint id, QOpenGLTextureUploader::BindOptions options, QOpenGLContext *context) : m_options(options) +{ + m_resource = new QOpenGLSharedResourceGuard(context, id, freeTexture); +} + +QT_END_NAMESPACE |