fenix/PDF4QT
1
0
Fork 0
mirror of https://github.com/JakubMelka/PDF4QT.git synced 2025-06-05 21:59:17 +02:00
Code Issues Packages Projects Releases Wiki Activity

Page prefetching, bugfixing

Browse Source
This commit is contained in:
Jakub Melka
2019-12-15 17:46:58 +01:00
parent 618f334e5d
commit 3cd2dd5104
10 changed files with 94 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
PdfForQtLib/sources/pdfdrawspacecontroller.cpp
View File

@ -606,7 +606,7 @@ void PDFDrawWidgetProxy::draw(QPainter* painter, QRect rect)
// Clear the page space by white color
painter->fillRect(placedRect, Qt::white);
const PDFPrecompiledPage* compiledPage = m_compiler->getPrecompiledCache(item.pageIndex, true);
const PDFPrecompiledPage* compiledPage = m_compiler->getCompiledPage(item.pageIndex, true);
if (compiledPage && compiledPage->isValid())
{
QElapsedTimer timer;
@ -676,7 +676,7 @@ QImage PDFDrawWidgetProxy::drawThumbnailImage(PDFInteger pageIndex, int pixelSiz
if (imageSize.isValid())
{
const PDFPrecompiledPage* compiledPage = m_compiler->getPrecompiledCache(pageIndex, true);
const PDFPrecompiledPage* compiledPage = m_compiler->getCompiledPage(pageIndex, true);
if (compiledPage && compiledPage->isValid())
{
// Rasterize the image.
@ -957,6 +957,41 @@ void PDFDrawWidgetProxy::updateRenderer(bool useOpenGL, const QSurfaceFormat& su
m_rasterizer->reset(useOpenGL, surfaceFormat);
}
void PDFDrawWidgetProxy::prefetchPages(PDFInteger pageIndex)
{
// Determine number of pages, which should be prefetched. In case of two or more pages,
// we need to prefetch more pages (for example, two for two columns/two pages display mode).
int prefetchCount = 0;
switch (m_controller->getPageLayout())
{
case PageLayout::OneColumn:
case PageLayout::SinglePage:
prefetchCount = 1;
break;
case PageLayout::TwoPagesLeft:
case PageLayout::TwoPagesRight:
case PageLayout::TwoColumnLeft:
case PageLayout::TwoColumnRight:
prefetchCount = 2;
break;
default:
Q_ASSERT(false);
break;
}
if (const PDFDocument* document = getDocument())
{
const PDFInteger pageCount = document->getCatalog()->getPageCount();
const PDFInteger pageEnd = qMin(pageCount, pageIndex + prefetchCount + 1);
for (PDFInteger i = pageIndex + 1; i < pageEnd; ++i)
{
m_compiler->getCompiledPage(i, true);
}
}
}
void PDFDrawWidgetProxy::onHorizontalScrollbarValueChanged(int value)
{
if (!m_updateDisabled && !m_horizontalScrollbar->isHidden())