diff options
Diffstat (limited to 'src/gui')
-rw-r--r-- | src/gui/image/qpixmapcache.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/gui/image/qpixmapcache.cpp b/src/gui/image/qpixmapcache.cpp index 3d1652f68b..e01a245cff 100644 --- a/src/gui/image/qpixmapcache.cpp +++ b/src/gui/image/qpixmapcache.cpp @@ -42,6 +42,8 @@ #include "qobject.h" #include "qdebug.h" #include "qpixmapcache_p.h" +#include "qthread.h" +#include "qcoreapplication.h" QT_BEGIN_NAMESPACE @@ -83,6 +85,9 @@ QT_BEGIN_NAMESPACE with QPixmapCache} explains how to use QPixmapCache to speed up applications by caching the results of painting. + \note QPixmapCache is only usable from the application's main thread. + Access from other threads will be ignored and return failure. + \sa QCache, QPixmap */ @@ -98,6 +103,14 @@ static inline int cost(const QPixmap &pixmap) return static_cast<int>(qBound(1LL, costKb, costMax)); } +static inline bool qt_pixmapcache_thread_test() +{ + if (Q_LIKELY(QCoreApplication::instance() && QThread::currentThread() == QCoreApplication::instance()->thread())) + return true; + + return false; +} + /*! \class QPixmapCache::Key \brief The QPixmapCache::Key class can be used for efficient access @@ -487,6 +500,8 @@ QPixmapCacheEntry::~QPixmapCacheEntry() QPixmap *QPixmapCache::find(const QString &key) { + if (!qt_pixmapcache_thread_test()) + return nullptr; return pm_cache()->object(key); } @@ -515,6 +530,8 @@ bool QPixmapCache::find(const QString &key, QPixmap& pixmap) bool QPixmapCache::find(const QString &key, QPixmap* pixmap) { + if (!qt_pixmapcache_thread_test()) + return false; QPixmap *ptr = pm_cache()->object(key); if (ptr && pixmap) *pixmap = *ptr; @@ -532,6 +549,8 @@ bool QPixmapCache::find(const QString &key, QPixmap* pixmap) */ bool QPixmapCache::find(const Key &key, QPixmap* pixmap) { + if (!qt_pixmapcache_thread_test()) + return false; //The key is not valid anymore, a flush happened before probably if (!key.d || !key.d->isValid) return false; @@ -563,6 +582,8 @@ bool QPixmapCache::find(const Key &key, QPixmap* pixmap) bool QPixmapCache::insert(const QString &key, const QPixmap &pixmap) { + if (!qt_pixmapcache_thread_test()) + return false; return pm_cache()->insert(key, pixmap, cost(pixmap)); } @@ -583,6 +604,8 @@ bool QPixmapCache::insert(const QString &key, const QPixmap &pixmap) */ QPixmapCache::Key QPixmapCache::insert(const QPixmap &pixmap) { + if (!qt_pixmapcache_thread_test()) + return QPixmapCache::Key(); return pm_cache()->insert(pixmap, cost(pixmap)); } @@ -597,6 +620,8 @@ QPixmapCache::Key QPixmapCache::insert(const QPixmap &pixmap) */ bool QPixmapCache::replace(const Key &key, const QPixmap &pixmap) { + if (!qt_pixmapcache_thread_test()) + return false; //The key is not valid anymore, a flush happened before probably if (!key.d || !key.d->isValid) return false; @@ -626,6 +651,8 @@ int QPixmapCache::cacheLimit() void QPixmapCache::setCacheLimit(int n) { + if (!qt_pixmapcache_thread_test()) + return; pm_cache()->setMaxCost(n); } @@ -634,6 +661,8 @@ void QPixmapCache::setCacheLimit(int n) */ void QPixmapCache::remove(const QString &key) { + if (!qt_pixmapcache_thread_test()) + return; pm_cache()->remove(key); } @@ -645,6 +674,8 @@ void QPixmapCache::remove(const QString &key) */ void QPixmapCache::remove(const Key &key) { + if (!qt_pixmapcache_thread_test()) + return; //The key is not valid anymore, a flush happened before probably if (!key.d || !key.d->isValid) return; @@ -657,6 +688,8 @@ void QPixmapCache::remove(const Key &key) void QPixmapCache::clear() { + if (!QCoreApplication::closingDown() && !qt_pixmapcache_thread_test()) + return; QT_TRY { if (pm_cache.exists()) pm_cache->clear(); |