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remove max previewimage memory usage

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This commit is contained in:
Albert S. 2019-08-26 09:35:39 +02:00
parent 582abc333f
commit 4aed15f7a4
1 changed files with 48 additions and 66 deletions
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114
gui/pdfworker.cpp
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@ -19,88 +19,71 @@ struct Renderer
double scaleX;
double scaleY;
QHash<QString, Poppler::Document *> documentcache;
qsizetype maxTotalPreviewImageMemUsage;
std::atomic<qsizetype> currentTotalPreviewImageMemUsage { 0 };
QVector<QString> wordsToHighlight;
Renderer(double scaleX, double scaleY, qsizetype maxPreviewImageMemUsage, QVector<QString> wordsToHighlight)
Renderer(double scaleX, double scaleY, QVector<QString> wordsToHighlight)
{
this->scaleX = scaleX;
this->scaleY = scaleY;
this->maxTotalPreviewImageMemUsage = maxPreviewImageMemUsage;
this->wordsToHighlight = wordsToHighlight;
}
/*we need this one because std::atomic has none, but this is only a functor for
concurrentmap, thus, it's ok for it to be half-broken*/
Renderer(const Renderer &o)
{
this->scaleX = o.scaleX;
this->scaleY = o.scaleY;
this->maxTotalPreviewImageMemUsage = o.maxTotalPreviewImageMemUsage;
this->wordsToHighlight = o.wordsToHighlight;
}
~Renderer()
{
qDeleteAll(documentcache);
}
Poppler::Document *document(QString path)
{
if(documentcache.contains(path))
return documentcache.value(path);
Poppler::Document *result = Poppler::Document::load(path);
if(result == nullptr)
{
//TODO: some kind of user feedback would be nice
return nullptr;
}
result->setRenderHint(Poppler::Document::TextAntialiasing);
QMutexLocker locker(&cacheMutex);
documentcache.insert(path, result);
return result;
if(documentcache.contains(path))
{
return documentcache.value(path);
}
Poppler::Document *result = Poppler::Document::load(path);
if(result == nullptr)
{
//TODO: some kind of user feedback would be nice
return nullptr;
}
result->setRenderHint(Poppler::Document::TextAntialiasing);
QMutexLocker locker(&cacheMutex);
documentcache.insert(path, result);
return result;
}
PdfPreview operator()(const PdfPreview &preview)
{
PdfPreview result = preview;
if(currentTotalPreviewImageMemUsage.load() < maxTotalPreviewImageMemUsage)
{
Poppler::Document *doc = document(preview.documentPath);
if(doc == nullptr)
{
return preview;
}
if(doc->isLocked())
{
return preview;
}
int p = (int)preview.page - 1;
if(p < 0)
{
p = 0;
}
Poppler::Page *pdfPage = doc->page(p);
QImage img = pdfPage->renderToImage(scaleX, scaleY);
for(QString & word : wordsToHighlight)
{
QList<QRectF> rects = pdfPage->search(word, Poppler::Page::CaseInsensitive);
for(QRectF &rect : rects)
{
QPainter painter(&img);
painter.scale(scaleX / 72.0, scaleY / 72.0);
painter.fillRect(rect, QColor(255, 255, 0, 64));
}
}
result.previewImage = img;
currentTotalPreviewImageMemUsage += img.sizeInBytes();
}
return result;
}
PdfPreview operator()(const PdfPreview &preview)
{
PdfPreview result = preview;
Poppler::Document *doc = document(preview.documentPath);
if(doc == nullptr)
{
return preview;
}
if(doc->isLocked())
{
return preview;
}
int p = (int)preview.page - 1;
if(p < 0)
{
p = 0;
}
Poppler::Page *pdfPage = doc->page(p);
QImage img = pdfPage->renderToImage(scaleX, scaleY);
for(QString & word : wordsToHighlight)
{
QList<QRectF> rects = pdfPage->search(word, Poppler::Page::CaseInsensitive);
for(QRectF &rect : rects)
{
QPainter painter(&img);
painter.scale(scaleX / 72.0, scaleY / 72.0);
painter.fillRect(rect, QColor(255, 255, 0, 64));
}
}
result.previewImage = img;
return result;
}
};
@ -126,7 +109,6 @@ QFuture<PdfPreview> PdfWorker::generatePreviews(const QVector<SearchResult> path
double scaleY = QGuiApplication::primaryScreen()->physicalDotsPerInchY() * scalefactor;
QSettings setting;
qsizetype maxPreviewImageMemUsage = setting.value("maxpreviewimagesmemory", 1024 * 1024 * 1024).toLongLong();
return QtConcurrent::mapped(previews, Renderer(scaleX, scaleY, maxPreviewImageMemUsage, wordsToHighlight));
return QtConcurrent::mapped(previews, Renderer(scaleX, scaleY, wordsToHighlight));
}