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Screenshots: do not retry image thumbnailing on null result

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This causes the thumbnailing thread pool to spend a lot of time attempting to
retry an image that failed. A null result is common where the image is too large
to be allocated (>128MiB alloc).

The repeated retries continue after page delete, causing hangs if a user
tries to exit the application.

Fixes: #1201
Signed-off-by: James Beddek <telans@posteo.de>
This commit is contained in:
James Beddek 2023-06-20 16:59:59 +12:00
parent f2471f0f68
commit 75bd626f33
No known key found for this signature in database
GPG Key ID: 0B4F753DA83DBA90
1 changed files with 22 additions and 29 deletions
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51
launcher/ui/pages/instance/ScreenshotsPage.cpp
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@ -96,37 +96,30 @@ public:
return;
if ((info.suffix().compare("png", Qt::CaseInsensitive) != 0))
return;
int tries = 5;
while (tries)
{
if (!m_cache->stale(m_path))
return;
QImage image(m_path);
if (image.isNull())
{
QThread::msleep(500);
tries--;
continue;
}
QImage small;
if (image.width() > image.height())
small = image.scaledToWidth(512).scaledToWidth(256, Qt::SmoothTransformation);
else
small = image.scaledToHeight(512).scaledToHeight(256, Qt::SmoothTransformation);
QPoint offset((256 - small.width()) / 2, (256 - small.height()) / 2);
QImage square(QSize(256, 256), QImage::Format_ARGB32);
square.fill(Qt::transparent);
QPainter painter(&square);
painter.drawImage(offset, small);
painter.end();
QIcon icon(QPixmap::fromImage(square));
m_cache->add(m_path, icon);
m_resultEmitter.emitResultsReady(m_path);
if (!m_cache->stale(m_path))
return;
QImage image(m_path);
if (image.isNull()) {
m_resultEmitter.emitResultsFailed(m_path);
qDebug() << "Error loading screenshot: " + m_path + ". Perhaps too large?";
return;
}
m_resultEmitter.emitResultsFailed(m_path);
QImage small;
if (image.width() > image.height())
small = image.scaledToWidth(512).scaledToWidth(256, Qt::SmoothTransformation);
else
small = image.scaledToHeight(512).scaledToHeight(256, Qt::SmoothTransformation);
QPoint offset((256 - small.width()) / 2, (256 - small.height()) / 2);
QImage square(QSize(256, 256), QImage::Format_ARGB32);
square.fill(Qt::transparent);
QPainter painter(&square);
painter.drawImage(offset, small);
painter.end();
QIcon icon(QPixmap::fromImage(square));
m_cache->add(m_path, icon);
m_resultEmitter.emitResultsReady(m_path);
}
QString m_path;
SharedIconCachePtr m_cache;