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Thumbnails rendering using OpenGL

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Jakub Melka
2019-12-15 16:45:49 +01:00
parent 1f09c83700
commit 618f334e5d
6 changed files with 277 additions and 7 deletions
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24
PdfForQtLib/sources/pdfdrawspacecontroller.cpp
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@ -396,7 +396,8 @@ PDFDrawWidgetProxy::PDFDrawWidgetProxy(QObject* parent) :
m_horizontalScrollbar(nullptr),
m_verticalScrollbar(nullptr),
m_features(PDFRenderer::getDefaultFeatures()),
m_compiler(new PDFAsynchronousPageCompiler(this))
m_compiler(new PDFAsynchronousPageCompiler(this)),
m_rasterizer(new PDFRasterizer(this))
{
m_controller = new PDFDrawSpaceController(this);
connect(m_controller, &PDFDrawSpaceController::drawSpaceChanged, this, &PDFDrawWidgetProxy::update);
@ -675,12 +676,18 @@ QImage PDFDrawWidgetProxy::drawThumbnailImage(PDFInteger pageIndex, int pixelSiz
if (imageSize.isValid())
{
image = QImage(imageSize, QImage::Format_RGBA8888_Premultiplied);
image.fill(Qt::white);
const PDFPrecompiledPage* compiledPage = m_compiler->getPrecompiledCache(pageIndex, true);
if (compiledPage && compiledPage->isValid())
{
// Rasterize the image.
image = m_rasterizer->render(page, compiledPage, imageSize, m_features);
}
QPainter painter(&image);
PDFRenderer renderer(m_controller->getDocument(), m_controller->getFontCache(), m_controller->getOptionalContentActivity(), m_features, m_meshQualitySettings);
renderer.render(&painter, QRect(QPoint(0, 0), imageSize), pageIndex);
if (image.isNull())
{
image = QImage(imageSize, QImage::Format_RGBA8888_Premultiplied);
image.fill(Qt::white);
}
}
}
@ -945,6 +952,11 @@ bool PDFDrawWidgetProxy::isBlockMode() const
return false;
}
void PDFDrawWidgetProxy::updateRenderer(bool useOpenGL, const QSurfaceFormat& surfaceFormat)
{
m_rasterizer->reset(useOpenGL, surfaceFormat);
}
void PDFDrawWidgetProxy::onHorizontalScrollbarValueChanged(int value)
{
if (!m_updateDisabled && !m_horizontalScrollbar->isHidden())