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Rendering pdf to images (first part)

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This commit is contained in:
Jakub Melka
2020-02-09 16:06:29 +01:00
parent a1d270e2ab
commit 15805d80af
10 changed files with 510 additions and 18 deletions
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87
PdfForQtViewer/pdfrendertoimagesdialog.cpp
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@ -18,17 +18,29 @@
#include "pdfrendertoimagesdialog.h"
#include "ui_pdfrendertoimagesdialog.h"
#include "pdfcms.h"
#include "pdfutils.h"
#include "pdfwidgetutils.h"
#include "pdfoptionalcontent.h"
#include "pdfdrawspacecontroller.h"
#include <QFileDialog>
#include <QMessageBox>
#include <QPushButton>
namespace pdfviewer
{
PDFRenderToImagesDialog::PDFRenderToImagesDialog(QWidget* parent) :
PDFRenderToImagesDialog::PDFRenderToImagesDialog(const pdf::PDFDocument* document,
pdf::PDFDrawWidgetProxy* proxy,
pdf::PDFProgress* progress,
QWidget* parent) :
QDialog(parent),
ui(new Ui::PDFRenderToImagesDialog),
m_document(document),
m_proxy(proxy),
m_progress(progress),
m_imageExportSettings(document),
m_isLoadingData(false)
{
ui->setupUi(this);
@ -56,6 +68,9 @@ PDFRenderToImagesDialog::PDFRenderToImagesDialog(QWidget* parent) :
connect(ui->optimizedWriteCheckBox, &QCheckBox::clicked, this, &PDFRenderToImagesDialog::onOptimizedWriteChanged);
connect(ui->progressiveScanWriteCheckBox, &QCheckBox::clicked, this, &PDFRenderToImagesDialog::onProgressiveScanWriteChanged);
ui->resolutionDPIEdit->setRange(pdf::PDFPageImageExportSettings::getMinDPIResolution(), pdf::PDFPageImageExportSettings::getMaxDPIResolution());
ui->resolutionPixelsEdit->setRange(pdf::PDFPageImageExportSettings::getMinPixelResolution(), pdf::PDFPageImageExportSettings::getMaxPixelResolution());
loadImageWriterSettings();
loadImageExportSettings();
@ -219,6 +234,11 @@ void PDFRenderToImagesDialog::onProgressiveScanWriteChanged(bool value)
m_imageWriterSettings.setProgressiveScanWrite(value);
}
void PDFRenderToImagesDialog::onRenderError(pdf::PDFRenderError error)
{
ui->progressMessagesEdit->setPlainText(QString("%1\n%2").arg(ui->progressMessagesEdit->toPlainText()).arg(error.message));
}
void PDFRenderToImagesDialog::on_selectDirectoryButton_clicked()
{
QString directory = QFileDialog::getExistingDirectory(this, tr("Select output directory"), ui->directoryEdit->text());
@ -228,6 +248,67 @@ void PDFRenderToImagesDialog::on_selectDirectoryButton_clicked()
}
}
void PDFRenderToImagesDialog::on_buttonBox_clicked(QAbstractButton* button)
{
if (button == ui->buttonBox->button(QDialogButtonBox::Apply))
{
QString message;
if (m_imageExportSettings.validate(&message))
{
// We are ready to render the document
std::vector<pdf::PDFInteger> pageIndices = m_imageExportSettings.getPages();
pdf::PDFOptionalContentActivity optionalContentActivity(m_document, pdf::OCUsage::Export, nullptr);
pdf::PDFCMSPointer cms = m_proxy->getCMSManager()->getCurrentCMS();
pdf::PDFRasterizerPool rasterizerPool(m_document, m_proxy->getFontCache(), cms.data(),
&optionalContentActivity, m_proxy->getFeatures(), m_proxy->getMeshQualitySettings(),
pdf::PDFRasterizerPool::getDefaultRasterizerCount(), m_proxy->isUsingOpenGL(), m_proxy->getSurfaceFormat(), this);
connect(&rasterizerPool, &pdf::PDFRasterizerPool::renderError, this, &PDFRenderToImagesDialog::onRenderError);
auto imageSizeGetter = [this](const pdf::PDFPage* page) -> QSize
{
Q_ASSERT(page);
switch (m_imageExportSettings.getResolutionMode())
{
case pdf::PDFPageImageExportSettings::ResolutionMode::DPI:
{
QSizeF size = page->getRotatedMediaBox().size() * m_imageExportSettings.getDpiResolution();
return size.toSize();
}
case pdf::PDFPageImageExportSettings::ResolutionMode::Pixels:
{
int pixelResolution = m_imageExportSettings.getPixelResolution();
QSizeF size = page->getRotatedMediaBox().size().scaled(pixelResolution, pixelResolution, Qt::KeepAspectRatio);
return size.toSize();
}
default:
{
Q_ASSERT(false);
break;
}
}
return QSize();
};
auto processImage = [](const pdf::PDFInteger pageIndex, QImage&& image)
{
Q_UNUSED(pageIndex);
Q_UNUSED(image);
};
setEnabled(false);
rasterizerPool.render(pageIndices, imageSizeGetter, processImage, m_progress);
setEnabled(true);
}
else
{
QMessageBox::critical(this, tr("Error"), message);
}
}
}
} // namespace pdfviewer