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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "printer_worker.h"
#include "printing/pdfium_document_wrapper_qt.h"
#include <QPainter>
#include <QPagedPaintDevice>
namespace QtWebEngineCore {
PrinterWorker::PrinterWorker(QSharedPointer<QByteArray> data, QPagedPaintDevice *device)
: m_data(data), m_device(device)
{
}
PrinterWorker::~PrinterWorker() { }
void PrinterWorker::print()
{
if (!m_data->size()) {
qWarning("Failed to print: Print result data is empty.");
Q_EMIT resultReady(false);
return;
}
PdfiumDocumentWrapperQt pdfiumWrapper(m_data->constData(), m_data->size());
const QPageRanges ranges = m_device->pageRanges();
int toPage = ranges.firstPage();
int fromPage = ranges.lastPage();
bool ascendingOrder = true;
if (fromPage == 0 && toPage == 0) {
fromPage = 1;
toPage = pdfiumWrapper.pageCount();
}
fromPage = qMax(1, fromPage);
toPage = qMin(pdfiumWrapper.pageCount(), toPage);
if (!m_firstPageFirst) {
qSwap(fromPage, toPage);
ascendingOrder = false;
}
int pageCopies = 1;
if (m_collateCopies) {
pageCopies = m_documentCopies;
m_documentCopies = 1;
}
qreal resolution = m_deviceResolution / 72.0; // pdfium uses points so 1/72 inch
QPainter painter;
for (int printedDocuments = 0; printedDocuments < m_documentCopies; printedDocuments++) {
if (printedDocuments > 0)
m_device->newPage();
int currentPageIndex = fromPage;
for (int i = 0; true; i++) {
QSizeF documentSize = (pdfiumWrapper.pageSize(currentPageIndex - 1) * resolution);
bool isLandscape = documentSize.width() > documentSize.height();
m_device->setPageOrientation(isLandscape ? QPageLayout::Landscape
: QPageLayout::Portrait);
QRectF paintRect = m_device->pageLayout().paintRectPixels(m_deviceResolution);
documentSize = documentSize.scaled(paintRect.size(), Qt::KeepAspectRatio);
// setPageOrientation has to be called before qpainter.begin() or before
// qprinter.newPage() so correct metrics is used, therefore call begin now for only
// first page
if (!painter.isActive() && !painter.begin(m_device)) {
qWarning("Failure to print on device: Could not open printer for painting.");
Q_EMIT resultReady(false);
return;
}
if (i > 0)
m_device->newPage();
for (int printedPages = 0; printedPages < pageCopies; printedPages++) {
if (printedPages > 0)
m_device->newPage();
QImage currentImage = pdfiumWrapper.pageAsQImage(
currentPageIndex - 1, documentSize.width(), documentSize.height());
if (currentImage.isNull()) {
Q_EMIT resultReady(false);
return;
}
painter.drawImage(0, 0, currentImage);
}
if (currentPageIndex == toPage)
break;
if (ascendingOrder)
currentPageIndex++;
else
currentPageIndex--;
}
}
painter.end();
Q_EMIT resultReady(true);
return;
}
} // namespace QtWebEngineCore
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