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Prevent QPixmap::load from touching QPixmapCache in non-gui threads

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Change-Id: Ied0fec48c81298743f694f317dd60e58d356f69a
Fixes: QTBUG-72523
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
This commit is contained in:
Joni Poikelin 2018-12-13 09:01:34 +02:00
parent 3b514f8535
commit 9bbeb7e6e8
1 changed files with 6 additions and 4 deletions
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10
src/gui/image/qpixmap.cpp
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@ -714,8 +714,8 @@ QBitmap QPixmap::createMaskFromColor(const QColor &maskColor, Qt::MaskMode mode)
control the conversion.
Note that QPixmaps are automatically added to the QPixmapCache
when loaded from a file; the key used is internal and can not
be acquired.
when loaded from a file in main thread; the key used is internal
and cannot be acquired.
\sa loadFromData(), {QPixmap#Reading and Writing Image
Files}{Reading and Writing Image Files}
@ -729,6 +729,7 @@ bool QPixmap::load(const QString &fileName, const char *format, Qt::ImageConvers
// Note: If no extension is provided, we try to match the
// file against known plugin extensions
if (info.completeSuffix().isEmpty() || info.exists()) {
const bool inGuiThread = qApp->thread() == QThread::currentThread();
QString key = QLatin1String("qt_pixmap")
% info.absoluteFilePath()
@ -736,13 +737,14 @@ bool QPixmap::load(const QString &fileName, const char *format, Qt::ImageConvers
% HexString<quint64>(info.size())
% HexString<uint>(data ? data->pixelType() : QPlatformPixmap::PixmapType);
if (QPixmapCache::find(key, this))
if (inGuiThread && QPixmapCache::find(key, this))
return true;
data = QPlatformPixmap::create(0, 0, data ? data->pixelType() : QPlatformPixmap::PixmapType);
if (data->fromFile(fileName, format, flags)) {
QPixmapCache::insert(key, *this);
if (inGuiThread)
QPixmapCache::insert(key, *this);
return true;
}
}