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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qsvgiohandler.h"
#ifndef QT_NO_SVGRENDERER
#include "qsvgrenderer.h"
#include "qimage.h"
#include "qpixmap.h"
#include "qpainter.h"
#include "qvariant.h"
#include "qbuffer.h"
#include "qdebug.h"
QT_BEGIN_NAMESPACE
class QSvgIOHandlerPrivate
{
public:
QSvgIOHandlerPrivate(QSvgIOHandler *qq)
: q(qq), loaded(false), readDone(false), backColor(Qt::transparent)
{}
bool load(QIODevice *device);
QSvgIOHandler *q;
QSvgRenderer r;
QXmlStreamReader xmlReader;
QSize defaultSize;
QRect clipRect;
QSize scaledSize;
QRect scaledClipRect;
bool loaded;
bool readDone;
QColor backColor;
};
bool QSvgIOHandlerPrivate::load(QIODevice *device)
{
if (loaded)
return true;
if (q->format().isEmpty())
q->canRead();
bool res = false;
QBuffer *buf = qobject_cast<QBuffer *>(device);
if (buf) {
res = r.load(buf->data());
} else if (q->format() == "svgz") {
res = r.load(device->readAll()); // ### can't stream svgz
} else {
xmlReader.setDevice(device);
res = r.load(&xmlReader); //### doesn't leave pos() correctly
}
if (res) {
defaultSize = QSize(r.viewBox().width(), r.viewBox().height());
loaded = true;
}
return loaded;
}
QSvgIOHandler::QSvgIOHandler()
: d(new QSvgIOHandlerPrivate(this))
{
}
QSvgIOHandler::~QSvgIOHandler()
{
delete d;
}
bool QSvgIOHandler::canRead() const
{
if (!device())
return false;
if (d->loaded && !d->readDone)
return true; // Will happen if we have been asked for the size
QByteArray buf = device()->peek(8);
if (buf.startsWith("\x1f\x8b")) {
setFormat("svgz");
return true;
} else if (buf.contains("<?xml") || buf.contains("<svg")) {
setFormat("svg");
return true;
}
return false;
}
QByteArray QSvgIOHandler::name() const
{
return "svg";
}
bool QSvgIOHandler::read(QImage *image)
{
if (!d->readDone && d->load(device())) {
bool xform = (d->clipRect.isValid() || d->scaledSize.isValid() || d->scaledClipRect.isValid());
QSize finalSize = d->defaultSize;
QRectF bounds;
if (xform && !d->defaultSize.isEmpty()) {
bounds = QRectF(QPointF(0,0), QSizeF(d->defaultSize));
QPoint tr1, tr2;
QSizeF sc(1, 1);
if (d->clipRect.isValid()) {
tr1 = -d->clipRect.topLeft();
finalSize = d->clipRect.size();
}
if (d->scaledSize.isValid()) {
sc = QSizeF(qreal(d->scaledSize.width()) / finalSize.width(),
qreal(d->scaledSize.height()) / finalSize.height());
finalSize = d->scaledSize;
}
if (d->scaledClipRect.isValid()) {
tr2 = -d->scaledClipRect.topLeft();
finalSize = d->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);
}
*image = QImage(finalSize, QImage::Format_ARGB32_Premultiplied);
if (!finalSize.isEmpty()) {
image->fill(d->backColor.rgba());
QPainter p(image);
d->r.render(&p, bounds);
p.end();
}
d->readDone = true;
return true;
}
return false;
}
QVariant QSvgIOHandler::option(ImageOption option) const
{
switch(option) {
case ImageFormat:
return QImage::Format_ARGB32_Premultiplied;
break;
case Size:
d->load(device());
return d->defaultSize;
break;
case ClipRect:
return d->clipRect;
break;
case ScaledSize:
return d->scaledSize;
break;
case ScaledClipRect:
return d->scaledClipRect;
break;
case BackgroundColor:
return d->backColor;
break;
default:
break;
}
return QVariant();
}
void QSvgIOHandler::setOption(ImageOption option, const QVariant & value)
{
switch(option) {
case ClipRect:
d->clipRect = value.toRect();
break;
case ScaledSize:
d->scaledSize = value.toSize();
break;
case ScaledClipRect:
d->scaledClipRect = value.toRect();
break;
case BackgroundColor:
d->backColor = value.value<QColor>();
break;
default:
break;
}
}
bool QSvgIOHandler::supportsOption(ImageOption option) const
{
switch(option)
{
case ImageFormat:
case Size:
case ClipRect:
case ScaledSize:
case ScaledClipRect:
case BackgroundColor:
return true;
default:
break;
}
return false;
}
bool QSvgIOHandler::canRead(QIODevice *device)
{
QByteArray buf = device->peek(8);
return buf.startsWith("\x1f\x8b") || buf.contains("<?xml") || buf.contains("<svg");
}
QT_END_NAMESPACE
#endif // QT_NO_SVGRENDERER
|
