--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/svg/qsvggraphics.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,675 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtSvg module 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 "qsvggraphics_p.h"
+
+#ifndef QT_NO_SVG
+
+#include "qsvgfont_p.h"
+
+#include "qpainter.h"
+#include "qtextdocument.h"
+#include "qabstracttextdocumentlayout.h"
+#include "qtextcursor.h"
+#include "qdebug.h"
+
+#include <math.h>
+#include <limits.h>
+
+QT_BEGIN_NAMESPACE
+
+#define QT_SVG_DRAW_SHAPE(command) \
+ qreal oldOpacity = p->opacity(); \
+ QBrush oldBrush = p->brush(); \
+ QPen oldPen = p->pen(); \
+ p->setPen(Qt::NoPen); \
+ p->setOpacity(oldOpacity * states.fillOpacity); \
+ command; \
+ p->setPen(oldPen); \
+ if (oldPen.widthF() != 0) { \
+ p->setOpacity(oldOpacity * states.strokeOpacity); \
+ p->setBrush(Qt::NoBrush); \
+ command; \
+ p->setBrush(oldBrush); \
+ } \
+ p->setOpacity(oldOpacity);
+
+
+void QSvgAnimation::draw(QPainter *, QSvgExtraStates &)
+{
+ qWarning("<animation> no implemented");
+}
+
+static inline QRectF boundsOnStroke(const QPainterPath &path, qreal width)
+{
+ QPainterPathStroker stroker;
+ stroker.setWidth(width);
+ QPainterPath stroke = stroker.createStroke(path);
+ return stroke.boundingRect();
+}
+
+QSvgCircle::QSvgCircle(QSvgNode *parent, const QRectF &rect)
+ : QSvgNode(parent), m_bounds(rect)
+{
+}
+
+
+QRectF QSvgCircle::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw))
+ return m_bounds;
+ else {
+ QPainterPath path;
+ path.addRect(m_bounds);
+ return boundsOnStroke(path, sw);
+ }
+}
+
+void QSvgCircle::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ QT_SVG_DRAW_SHAPE(p->drawEllipse(m_bounds));
+ revertStyle(p, states);
+}
+
+QSvgArc::QSvgArc(QSvgNode *parent, const QPainterPath &path)
+ : QSvgNode(parent), cubic(path)
+{
+ m_cachedBounds = path.boundingRect();
+}
+
+void QSvgArc::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ if (p->pen().widthF() != 0) {
+ qreal oldOpacity = p->opacity();
+ p->setOpacity(oldOpacity * states.strokeOpacity);
+ p->drawPath(cubic);
+ p->setOpacity(oldOpacity);
+ }
+ revertStyle(p, states);
+}
+
+QSvgEllipse::QSvgEllipse(QSvgNode *parent, const QRectF &rect)
+ : QSvgNode(parent), m_bounds(rect)
+{
+}
+
+QRectF QSvgEllipse::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw))
+ return m_bounds;
+ else {
+ QPainterPath path;
+ path.addEllipse(m_bounds);
+ return boundsOnStroke(path, sw);
+ }
+}
+
+void QSvgEllipse::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ QT_SVG_DRAW_SHAPE(p->drawEllipse(m_bounds));
+ revertStyle(p, states);
+}
+
+QSvgImage::QSvgImage(QSvgNode *parent, const QImage &image,
+ const QRect &bounds)
+ : QSvgNode(parent), m_image(image),
+ m_bounds(bounds)
+{
+ if (m_bounds.width() == 0)
+ m_bounds.setWidth(m_image.width());
+ if (m_bounds.height() == 0)
+ m_bounds.setHeight(m_image.height());
+}
+
+void QSvgImage::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ p->drawImage(m_bounds, m_image);
+ revertStyle(p, states);
+}
+
+
+QSvgLine::QSvgLine(QSvgNode *parent, const QLineF &line)
+ : QSvgNode(parent), m_bounds(line)
+{
+}
+
+
+void QSvgLine::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ if (p->pen().widthF() != 0) {
+ qreal oldOpacity = p->opacity();
+ p->setOpacity(oldOpacity * states.strokeOpacity);
+ p->drawLine(m_bounds);
+ p->setOpacity(oldOpacity);
+ }
+ revertStyle(p, states);
+}
+
+QSvgPath::QSvgPath(QSvgNode *parent, const QPainterPath &qpath)
+ : QSvgNode(parent), m_path(qpath)
+{
+}
+
+void QSvgPath::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ m_path.setFillRule(states.fillRule);
+ QT_SVG_DRAW_SHAPE(p->drawPath(m_path));
+ revertStyle(p, states);
+}
+
+QRectF QSvgPath::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw)) {
+ if (m_cachedBounds.isNull())
+ //m_cachedBounds = m_path.controlPointRect();
+ m_cachedBounds = m_path.boundingRect();
+
+ return m_cachedBounds;
+ }
+ else {
+ return boundsOnStroke(m_path, sw);
+ }
+}
+
+QSvgPolygon::QSvgPolygon(QSvgNode *parent, const QPolygonF &poly)
+ : QSvgNode(parent), m_poly(poly)
+{
+}
+
+QRectF QSvgPolygon::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw))
+ return m_poly.boundingRect();
+ else {
+ QPainterPath path;
+ path.addPolygon(m_poly);
+ return boundsOnStroke(path, sw);
+ }
+}
+
+void QSvgPolygon::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ QT_SVG_DRAW_SHAPE(p->drawPolygon(m_poly, states.fillRule));
+ revertStyle(p, states);
+}
+
+
+QSvgPolyline::QSvgPolyline(QSvgNode *parent, const QPolygonF &poly)
+ : QSvgNode(parent), m_poly(poly)
+{
+
+}
+
+void QSvgPolyline::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ qreal oldOpacity = p->opacity();
+ if (p->brush().style() != Qt::NoBrush) {
+ QPen save = p->pen();
+ p->setPen(QPen(Qt::NoPen));
+ p->setOpacity(oldOpacity * states.fillOpacity);
+ p->drawPolygon(m_poly, states.fillRule);
+ p->setPen(save);
+ }
+ if (p->pen().widthF() != 0) {
+ p->setOpacity(oldOpacity * states.strokeOpacity);
+ p->drawPolyline(m_poly);
+ }
+ p->setOpacity(oldOpacity);
+ revertStyle(p, states);
+}
+
+QSvgRect::QSvgRect(QSvgNode *node, const QRectF &rect, int rx, int ry)
+ : QSvgNode(node),
+ m_rect(rect), m_rx(rx), m_ry(ry)
+{
+}
+
+QRectF QSvgRect::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw))
+ return m_rect;
+ else {
+ QPainterPath path;
+ path.addRect(m_rect);
+ return boundsOnStroke(path, sw);
+ }
+}
+
+void QSvgRect::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ if (m_rx || m_ry) {
+ QT_SVG_DRAW_SHAPE(p->drawRoundedRect(m_rect, m_rx, m_ry, Qt::RelativeSize));
+ } else {
+ QT_SVG_DRAW_SHAPE(p->drawRect(m_rect));
+ }
+ revertStyle(p, states);
+}
+
+QSvgTspan * const QSvgText::LINEBREAK = 0;
+
+QSvgText::QSvgText(QSvgNode *parent, const QPointF &coord)
+ : QSvgNode(parent)
+ , m_coord(coord)
+ , m_type(TEXT)
+ , m_size(0, 0)
+ , m_mode(Default)
+{
+}
+
+QSvgText::~QSvgText()
+{
+ for (int i = 0; i < m_tspans.size(); ++i) {
+ if (m_tspans[i] != LINEBREAK)
+ delete m_tspans[i];
+ }
+}
+
+void QSvgText::setTextArea(const QSizeF &size)
+{
+ m_size = size;
+ m_type = TEXTAREA;
+}
+
+//QRectF QSvgText::bounds() const {}
+
+void QSvgText::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+ qreal oldOpacity = p->opacity();
+ p->setOpacity(oldOpacity * states.fillOpacity);
+
+ // Force the font to have a size of 100 pixels to avoid truncation problems
+ // when the font is very small.
+ qreal scale = 100.0 / p->font().pointSizeF();
+ Qt::Alignment alignment = states.textAnchor;
+
+ QTransform oldTransform = p->worldTransform();
+ p->scale(1 / scale, 1 / scale);
+
+ qreal y = 0;
+ bool initial = true;
+ qreal px = m_coord.x() * scale;
+ qreal py = m_coord.y() * scale;
+ QSizeF scaledSize = m_size * scale;
+
+ if (m_type == TEXTAREA) {
+ if (alignment == Qt::AlignHCenter)
+ px += scaledSize.width() / 2;
+ else if (alignment == Qt::AlignRight)
+ px += scaledSize.width();
+ }
+
+ QRectF bounds;
+ if (m_size.height() != 0)
+ bounds = QRectF(0, py, 1, scaledSize.height()); // x and width are not used.
+
+ bool appendSpace = false;
+ QVector<QString> paragraphs;
+ QStack<QTextCharFormat> formats;
+ QVector<QList<QTextLayout::FormatRange> > formatRanges;
+ paragraphs.push_back(QString());
+ formatRanges.push_back(QList<QTextLayout::FormatRange>());
+
+ for (int i = 0; i < m_tspans.size(); ++i) {
+ if (m_tspans[i] == LINEBREAK) {
+ if (m_type == TEXTAREA) {
+ if (paragraphs.back().isEmpty()) {
+ QFont font = p->font();
+ font.setPixelSize(font.pointSizeF() * scale);
+
+ QTextLayout::FormatRange range;
+ range.start = 0;
+ range.length = 1;
+ range.format.setFont(font);
+ formatRanges.back().append(range);
+
+ paragraphs.back().append(QLatin1Char(' '));;
+ }
+ appendSpace = false;
+ paragraphs.push_back(QString());
+ formatRanges.push_back(QList<QTextLayout::FormatRange>());
+ }
+ } else {
+ WhitespaceMode mode = m_tspans[i]->whitespaceMode();
+ m_tspans[i]->applyStyle(p, states);
+
+ QFont font = p->font();
+ font.setPixelSize(font.pointSizeF() * scale);
+
+ QString newText(m_tspans[i]->text());
+ newText.replace(QLatin1Char('\t'), QLatin1Char(' '));
+ newText.replace(QLatin1Char('\n'), QLatin1Char(' '));
+
+ bool prependSpace = !appendSpace && !m_tspans[i]->isTspan() && (mode == Default) && !paragraphs.back().isEmpty() && newText.startsWith(QLatin1Char(' '));
+ if (appendSpace || prependSpace)
+ paragraphs.back().append(QLatin1Char(' '));
+
+ bool appendSpaceNext = (!m_tspans[i]->isTspan() && (mode == Default) && newText.endsWith(QLatin1Char(' ')));
+
+ if (mode == Default) {
+ newText = newText.simplified();
+ if (newText.isEmpty())
+ appendSpaceNext = false;
+ }
+
+ QTextLayout::FormatRange range;
+ range.start = paragraphs.back().length();
+ range.length = newText.length();
+ range.format.setFont(font);
+ range.format.setTextOutline(p->pen());
+ range.format.setForeground(p->brush());
+
+ if (appendSpace) {
+ Q_ASSERT(!formatRanges.back().isEmpty());
+ ++formatRanges.back().back().length;
+ } else if (prependSpace) {
+ --range.start;
+ ++range.length;
+ }
+ formatRanges.back().append(range);
+
+ appendSpace = appendSpaceNext;
+ paragraphs.back() += newText;
+
+ m_tspans[i]->revertStyle(p, states);
+ }
+ }
+
+ if (states.svgFont) {
+ // SVG fonts not fully supported...
+ QString text = paragraphs.front();
+ for (int i = 1; i < paragraphs.size(); ++i) {
+ text.append(QLatin1Char('\n'));
+ text.append(paragraphs[i]);
+ }
+ states.svgFont->draw(p, m_coord * scale, text, p->font().pointSizeF() * scale, states.textAnchor);
+ } else {
+ for (int i = 0; i < paragraphs.size(); ++i) {
+ QTextLayout tl(paragraphs[i]);
+ QTextOption op = tl.textOption();
+ op.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
+ tl.setTextOption(op);
+ tl.setAdditionalFormats(formatRanges[i]);
+ tl.beginLayout();
+
+ forever {
+ QTextLine line = tl.createLine();
+ if (!line.isValid())
+ break;
+ if (m_size.width() != 0)
+ line.setLineWidth(scaledSize.width());
+ }
+ tl.endLayout();
+
+ bool endOfBoundsReached = false;
+ for (int i = 0; i < tl.lineCount(); ++i) {
+ QTextLine line = tl.lineAt(i);
+
+ qreal x = 0;
+ if (alignment == Qt::AlignHCenter)
+ x -= 0.5 * line.naturalTextWidth();
+ else if (alignment == Qt::AlignRight)
+ x -= line.naturalTextWidth();
+
+ if (initial && m_type == TEXT)
+ y -= line.ascent();
+ initial = false;
+
+ line.setPosition(QPointF(x, y));
+
+ // Check if the current line fits into the bounding rectangle.
+ if ((m_size.width() != 0 && line.naturalTextWidth() > scaledSize.width())
+ || (m_size.height() != 0 && y + line.height() > scaledSize.height())) {
+ // I need to set the bounds height to 'y-epsilon' to avoid drawing the current
+ // line. Since the font is scaled to 100 units, 1 should be a safe epsilon.
+ bounds.setHeight(y - 1);
+ endOfBoundsReached = true;
+ break;
+ }
+
+ y += 1.1 * line.height();
+ }
+ tl.draw(p, QPointF(px, py), QVector<QTextLayout::FormatRange>(), bounds);
+
+ if (endOfBoundsReached)
+ break;
+ }
+ }
+
+ p->setWorldTransform(oldTransform, false);
+ p->setOpacity(oldOpacity);
+ revertStyle(p, states);
+}
+
+void QSvgText::addText(const QString &text)
+{
+ m_tspans.append(new QSvgTspan(this, false));
+ m_tspans.back()->setWhitespaceMode(m_mode);
+ m_tspans.back()->addText(text);
+}
+
+QSvgUse::QSvgUse(const QPointF &start, QSvgNode *parent, QSvgNode *node)
+ : QSvgNode(parent), m_link(node), m_start(start)
+{
+
+}
+
+void QSvgUse::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+
+ if (!m_start.isNull()) {
+ p->translate(m_start);
+ }
+ m_link->draw(p, states);
+ if (!m_start.isNull()) {
+ p->translate(-m_start);
+ }
+
+ revertStyle(p, states);
+}
+
+void QSvgVideo::draw(QPainter *p, QSvgExtraStates &states)
+{
+ applyStyle(p, states);
+
+ revertStyle(p, states);
+}
+
+QSvgNode::Type QSvgAnimation::type() const
+{
+ return ANIMATION;
+}
+
+QSvgNode::Type QSvgArc::type() const
+{
+ return ARC;
+}
+
+QSvgNode::Type QSvgCircle::type() const
+{
+ return CIRCLE;
+}
+
+QSvgNode::Type QSvgEllipse::type() const
+{
+ return ELLIPSE;
+}
+
+QSvgNode::Type QSvgImage::type() const
+{
+ return IMAGE;
+}
+
+QSvgNode::Type QSvgLine::type() const
+{
+ return LINE;
+}
+
+QSvgNode::Type QSvgPath::type() const
+{
+ return PATH;
+}
+
+QSvgNode::Type QSvgPolygon::type() const
+{
+ return POLYGON;
+}
+
+QSvgNode::Type QSvgPolyline::type() const
+{
+ return POLYLINE;
+}
+
+QSvgNode::Type QSvgRect::type() const
+{
+ return RECT;
+}
+
+QSvgNode::Type QSvgText::type() const
+{
+ return m_type;
+}
+
+QSvgNode::Type QSvgUse::type() const
+{
+ return USE;
+}
+
+QSvgNode::Type QSvgVideo::type() const
+{
+ return VIDEO;
+}
+
+QRectF QSvgUse::bounds() const
+{
+ if (m_link && m_bounds.isEmpty()) {
+ m_bounds = m_link->bounds();
+ m_bounds = QRectF(m_bounds.x()+m_start.x(),
+ m_bounds.y()+m_start.y(),
+ m_bounds.width(),
+ m_bounds.height());
+
+ return m_bounds;
+ }
+ return m_bounds;
+}
+
+QRectF QSvgUse::transformedBounds(const QTransform &transform) const
+{
+ QRectF bounds;
+ QTransform t = transform;
+
+ if (m_link) {
+ QSvgTransformStyle *transStyle = m_style.transform;
+ if (transStyle) {
+ t = transStyle->qtransform() * t;
+ }
+ t.translate(m_start.x(), m_start.y());
+
+ bounds = m_link->transformedBounds(t);
+
+ return bounds;
+ }
+ return bounds;
+}
+
+QRectF QSvgPolyline::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw))
+ return m_poly.boundingRect();
+ else {
+ QPainterPath path;
+ path.addPolygon(m_poly);
+ return boundsOnStroke(path, sw);
+ }
+}
+
+QRectF QSvgArc::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw))
+ return m_cachedBounds;
+ else {
+ return boundsOnStroke(cubic, sw);
+ }
+}
+
+QRectF QSvgImage::bounds() const
+{
+ return m_bounds;
+}
+
+QRectF QSvgLine::bounds() const
+{
+ qreal sw = strokeWidth();
+ if (qFuzzyIsNull(sw)) {
+ qreal minX = qMin(m_bounds.x1(), m_bounds.x2());
+ qreal minY = qMin(m_bounds.y1(), m_bounds.y2());
+ qreal maxX = qMax(m_bounds.x1(), m_bounds.x2());
+ qreal maxY = qMax(m_bounds.y1(), m_bounds.y2());
+ return QRectF(minX, minY, maxX-minX, maxY-minY);
+ } else {
+ QPainterPath path;
+ path.moveTo(m_bounds.x1(), m_bounds.y1());
+ path.lineTo(m_bounds.x2(), m_bounds.y2());
+ return boundsOnStroke(path, sw);
+ }
+}
+
+QT_END_NAMESPACE
+
+#endif // QT_NO_SVG