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/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtPDF module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qpdfiohandler_p.h"
#include <QLoggingCategory>
#include <QPainter>
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(qLcPdf, "qt.imageformat.pdf")
QPdfIOHandler::QPdfIOHandler()
{
}
bool QPdfIOHandler::canRead() const
{
if (!device())
return false;
if (m_loaded)
return true;
if (QPdfIOHandler::canRead(device())) {
setFormat("pdf");
return true;
}
return false;
}
bool QPdfIOHandler::canRead(QIODevice *device)
{
char buf[6];
device->peek(buf, 6);
return (!qstrncmp(buf, "%PDF-", 5) || Q_UNLIKELY(!qstrncmp(buf, "\012%PDF-", 6)));
}
int QPdfIOHandler::currentImageNumber() const
{
return m_page;
}
QRect QPdfIOHandler::currentImageRect() const
{
return QRect(QPoint(0, 0), m_doc.pageSize(m_page).toSize());
}
int QPdfIOHandler::imageCount() const
{
int ret = 0;
if (const_cast<QPdfIOHandler *>(this)->load(device()))
ret = m_doc.pageCount();
qCDebug(qLcPdf) << "imageCount" << ret;
return ret;
}
QByteArray QPdfIOHandler::name() const
{
return m_doc.metaData(QPdfDocument::MetaDataField::Title).toString().toLocal8Bit();
}
bool QPdfIOHandler::read(QImage *image)
{
if (load(device())) {
if (m_page >= m_doc.pageCount())
return false;
if (m_page < 0)
m_page = 0;
const bool xform = (m_clipRect.isValid() || m_scaledSize.isValid() || m_scaledClipRect.isValid());
QSize pageSize = m_doc.pageSize(m_page).toSize();
QSize finalSize = pageSize;
QRectF bounds;
if (xform && !finalSize.isEmpty()) {
bounds = QRectF(QPointF(0,0), QSizeF(finalSize));
QPoint tr1, tr2;
QSizeF sc(1, 1);
if (m_clipRect.isValid()) {
tr1 = -m_clipRect.topLeft();
finalSize = m_clipRect.size();
}
if (m_scaledSize.isValid()) {
sc = QSizeF(qreal(m_scaledSize.width()) / finalSize.width(),
qreal(m_scaledSize.height()) / finalSize.height());
finalSize = m_scaledSize;
pageSize = m_scaledSize;
}
if (m_scaledClipRect.isValid()) {
tr2 = -m_scaledClipRect.topLeft();
finalSize = m_scaledClipRect.size();
}
QTransform t;
t.translate(tr2.x(), tr2.y());
t.scale(sc.width(), sc.height());
t.translate(tr1.x(), tr1.y());
bounds = t.mapRect(bounds);
}
qCDebug(qLcPdf) << Q_FUNC_INFO << m_page << finalSize;
if (image->size() != finalSize || !image->reinterpretAsFormat(QImage::Format_ARGB32_Premultiplied)) {
*image = QImage(finalSize, QImage::Format_ARGB32_Premultiplied);
if (!finalSize.isEmpty() && image->isNull()) {
// avoid QTBUG-68229
qWarning("QPdfIOHandler: QImage allocation failed (size %i x %i)", finalSize.width(), finalSize.height());
return false;
}
}
if (!finalSize.isEmpty()) {
QPdfDocumentRenderOptions options;
if (m_scaledClipRect.isValid())
options.setScaledClipRect(m_scaledClipRect);
options.setScaledSize(pageSize);
image->fill(m_backColor.rgba());
QPainter p(image);
QImage pageImage = m_doc.render(m_page, finalSize, options);
p.drawImage(0, 0, pageImage);
p.end();
}
return true;
}
return false;
}
QVariant QPdfIOHandler::option(ImageOption option) const
{
switch (option) {
case ImageFormat:
return QImage::Format_ARGB32_Premultiplied;
case Size:
const_cast<QPdfIOHandler *>(this)->load(device());
return m_doc.pageSize(qMax(0, m_page));
case ClipRect:
return m_clipRect;
case ScaledSize:
return m_scaledSize;
case ScaledClipRect:
return m_scaledClipRect;
case BackgroundColor:
return m_backColor;
case Name:
return m_doc.metaData(QPdfDocument::Title);
default:
break;
}
return QVariant();
}
void QPdfIOHandler::setOption(ImageOption option, const QVariant & value)
{
switch (option) {
case ClipRect:
m_clipRect = value.toRect();
break;
case ScaledSize:
m_scaledSize = value.toSize();
break;
case ScaledClipRect:
m_scaledClipRect = value.toRect();
break;
case BackgroundColor:
m_backColor = value.value<QColor>();
break;
default:
break;
}
}
bool QPdfIOHandler::supportsOption(ImageOption option) const
{
switch (option)
{
case ImageFormat:
case Size:
case ClipRect:
case ScaledSize:
case ScaledClipRect:
case BackgroundColor:
case Name:
return true;
default:
break;
}
return false;
}
bool QPdfIOHandler::jumpToImage(int frame)
{
qCDebug(qLcPdf) << Q_FUNC_INFO << frame;
if (frame < 0 || frame >= m_doc.pageCount())
return false;
m_page = frame;
return true;
}
bool QPdfIOHandler::jumpToNextImage()
{
return jumpToImage(m_page + 1);
}
bool QPdfIOHandler::load(QIODevice *device)
{
if (m_loaded)
return true;
if (format().isEmpty())
if (!canRead())
return false;
m_doc.load(device);
m_loaded = (m_doc.error() == QPdfDocument::DocumentError::NoError);
return m_loaded;
}
QT_END_NAMESPACE
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