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RenderPathQt.cpp

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00001 /*
00002     Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <wildfox@kde.org>
00003                   2004, 2005, 2006 Rob Buis <buis@kde.org>
00004                   2005 Eric Seidel <eric.seidel@kdemail.net>
00005 
00006     This file is part of the KDE project
00007 
00008     This library is free software; you can redistribute it and/or
00009     modify it under the terms of the GNU Library General Public
00010     License as published by the Free Software Foundation; either
00011     version 2 of the License, or (at your option) any later version.
00012 
00013     This library is distributed in the hope that it will be useful,
00014     but WITHOUT ANY WARRANTY; without even the implied warranty of
00015     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016     Library General Public License for more details.
00017 
00018     You should have received a copy of the GNU Library General Public License
00019     aint with this library; see the file COPYING.LIB.  If not, write to
00020     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00021     Boston, MA 02110-1301, USA.
00022 */
00023 
00024 #include "config.h"
00025 #include "RenderPath.h"
00026 #include "SVGRenderStyle.h"
00027 #include "SVGPaintServer.h"
00028 
00029 #include <QDebug>
00030 #include <QPainterPathStroker>
00031 
00032 namespace WebCore {
00033     
00034 bool RenderPath::strokeContains(const FloatPoint& point, bool requiresStroke) const
00035 {
00036     if (path().isEmpty())
00037         return false;
00038 
00039     if (requiresStroke && !SVGPaintServer::strokePaintServer(style(), this))
00040         return false;
00041 
00042     return false;
00043 }
00044 
00045 static QPainterPath getPathStroke(const QPainterPath &path, const RenderObject* object, const RenderStyle* style)
00046 { 
00047     QPainterPathStroker s;
00048     s.setWidth(SVGRenderStyle::cssPrimitiveToLength(object, style->svgStyle()->strokeWidth(), 1.0));
00049 
00050     if (style->svgStyle()->capStyle() == ButtCap)
00051         s.setCapStyle(Qt::FlatCap);
00052     else if (style->svgStyle()->capStyle() == RoundCap)
00053         s.setCapStyle(Qt::RoundCap);
00054 
00055     if (style->svgStyle()->joinStyle() == MiterJoin) {
00056         s.setJoinStyle(Qt::MiterJoin);
00057         s.setMiterLimit((qreal) style->svgStyle()->strokeMiterLimit());
00058     } else if(style->svgStyle()->joinStyle() == RoundJoin)
00059         s.setJoinStyle(Qt::RoundJoin);
00060 
00061     const DashArray& dashes = WebCore::dashArrayFromRenderingStyle(style);
00062     double dashOffset = SVGRenderStyle::cssPrimitiveToLength(object, style->svgStyle()->strokeDashOffset(), 0.0);
00063 
00064     unsigned int dashLength = !dashes.isEmpty() ? dashes.size() : 0;
00065     if(dashLength) {
00066         QVector<qreal> pattern;
00067         unsigned int count = (dashLength % 2) == 0 ? dashLength : dashLength * 2;
00068 
00069         for(unsigned int i = 0; i < count; i++)
00070             pattern.append(dashes[i % dashLength] / (float)s.width());
00071 
00072         s.setDashPattern(pattern);
00073     
00074         Q_UNUSED(dashOffset);
00075         // TODO: dash-offset, does/will qt4 API allow it? (Rob)
00076     }
00077 
00078     return s.createStroke(path);
00079 }
00080 
00081 FloatRect RenderPath::strokeBBox() const
00082 {
00083     QPainterPath outline = getPathStroke(*(path().platformPath()), this, style());
00084     return outline.boundingRect();
00085 }
00086 
00087 }
00088 
00089 // vim:ts=4:noet

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