diff options
Diffstat (limited to 'src/plugins/imageformats/svg/qsvgiohandler.cpp')
| -rw-r--r-- | src/plugins/imageformats/svg/qsvgiohandler.cpp | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/src/plugins/imageformats/svg/qsvgiohandler.cpp b/src/plugins/imageformats/svg/qsvgiohandler.cpp new file mode 100644 index 0000000..3c8f2e9 --- /dev/null +++ b/src/plugins/imageformats/svg/qsvgiohandler.cpp @@ -0,0 +1,267 @@ +/**************************************************************************** +** +** 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 |