path: root/src/opengl/qopengltexturecache.cpp

// 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#include"qopengltexturecache_p.h"#include <private/qopengltextureuploader_p.h>#include <qmath.h>#include <qopenglfunctions.h>#include <private/qimagepixmapcleanuphooks_p.h>#include <qpa/qplatformpixmap.h>#include <qtopengl_tracepoints_p.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 voidcleanupTexturesForCacheKey(qint64 key);static voidcleanupTexturesForPixmapData(QPlatformPixmap *pmd);private: QOpenGLMultiGroupSharedResource m_resource; QMutex m_mutex;};Q_GLOBAL_STATIC(QOpenGLTextureCacheWrapper, qt_texture_caches) QOpenGLTextureCache *QOpenGLTextureCache::cacheForContext(QOpenGLContext *context){returnqt_texture_caches()->cacheForContext(context);}voidQOpenGLTextureCacheWrapper::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);}voidQOpenGLTextureCacheWrapper::cleanupTexturesForPixmapData(QPlatformPixmap *pmd){cleanupTexturesForCacheKey(pmd->cacheKey());}static quint64 cacheSize(){bool ok =false;const int envCacheSize =qEnvironmentVariableIntValue("QT_OPENGL_TEXTURE_CACHE_SIZE", &ok);if(ok)return envCacheSize;return1024*1024;// 1024 MB cache default}QOpenGLTextureCache::QOpenGLTextureCache(QOpenGLContext *ctx):QOpenGLSharedResource(ctx->shareGroup()),m_cache(cacheSize()){}QOpenGLTextureCache::~QOpenGLTextureCache(){}QOpenGLTextureCache::BindResult 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(), {} };}} BindResult result =bindTexture(context, key, pixmap.toImage(), options);if(result.id >0)QImagePixmapCleanupHooks::enableCleanupHooks(pixmap);return result;}QOpenGLTextureCache::BindResult 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; BindResult result =bindTexture(context, key, img, options);if(result.id >0)QImagePixmapCleanupHooks::enableCleanupHooks(image);return result;}Q_TRACE_POINT(qtopengl, QOpenGLTextureCache_bindTexture_entry, QOpenGLContext *context, qint64 key,const unsigned char*image,int options);Q_TRACE_POINT(qtopengl, QOpenGLTextureCache_bindTexture_exit);QOpenGLTextureCache::BindResult QOpenGLTextureCache::bindTexture(QOpenGLContext *context, qint64 key,const QImage &image,QOpenGLTextureUploader::BindOptions options){Q_TRACE_SCOPE(QOpenGLTextureCache_bindTexture, context, key, image.bits(), 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,newQOpenGLCachedTexture(id, options, context), cost /1024);return{ id,BindResultFlag::NewTexture };}voidQOpenGLTextureCache::invalidate(qint64 key){ QMutexLocker locker(&m_mutex); m_cache.remove(key);}voidQOpenGLTextureCache::invalidateResource(){ m_cache.clear();}voidQOpenGLTextureCache::freeResource(QOpenGLContext *){Q_ASSERT(false);// the texture cache lives until the context group disappears}static voidfreeTexture(QOpenGLFunctions *funcs, GLuint id){ funcs->glDeleteTextures(1, &id);}QOpenGLCachedTexture::QOpenGLCachedTexture(GLuint id,QOpenGLTextureUploader::BindOptions options, QOpenGLContext *context) :m_options(options){ m_resource =newQOpenGLSharedResourceGuard(context, id, freeTexture);} QT_END_NAMESPACE