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authorQt by Nokia <qt-info@nokia.com>2011-04-27 12:05:43 +0200
committeraxis <qt-info@nokia.com>2011-04-27 12:05:43 +0200
commit983a4b61f1da719dac647a7190533d1edf2b2159 (patch)
tree3b52101d36c2b432540c20e0e188f62197c42c59 /src/plugins/imageformats/svg/qsvgiohandler.cpp
downloadqtsvg-983a4b61f1da719dac647a7190533d1edf2b2159.tar.gz
Initial import from the monolithic Qt.
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
Diffstat (limited to 'src/plugins/imageformats/svg/qsvgiohandler.cpp')
-rw-r--r--src/plugins/imageformats/svg/qsvgiohandler.cpp267
1 files changed, 267 insertions, 0 deletions
diff --git a/src/plugins/imageformats/svg/qsvgiohandler.cpp b/src/plugins/imageformats/svg/qsvgiohandler.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 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();
+
+ // # The SVG renderer doesn't handle trailing, unrelated data, so we must
+ // assume that all available data in the device is to be read.
+ bool res = false;
+ QBuffer *buf = qobject_cast<QBuffer *>(device);
+ if (buf) {
+ const QByteArray &ba = buf->data();
+ res = r.load(QByteArray::fromRawData(ba.constData() + buf->pos(), ba.size() - buf->pos()));
+ buf->seek(ba.size());
+ } else if (q->format() == "svgz") {
+ res = r.load(device->readAll());
+ } else {
+ xmlReader.setDevice(device);
+ res = r.load(&xmlReader);
+ }
+
+ 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