1 files changed, 127 insertions, 0 deletions
diff --git a/WebCore/svg/graphics/qt/SVGResourceClipperQt.cpp b/WebCore/svg/graphics/qt/SVGResourceClipperQt.cpp
new file mode 100644
index 0000000..42d3855
--- /dev/null
+++ b/WebCore/svg/graphics/qt/SVGResourceClipperQt.cpp
@@ -0,0 +1,127 @@
+/*
+    Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <wildfox@kde.org>
+                  2004, 2005, 2006 Rob Buis <buis@kde.org>
+                  2005 Apple Computer, Inc.
+
+    This file is part of the KDE project
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    aint with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include "config.h"
+
+#if ENABLE(SVG)
+#include "SVGResourceClipper.h"
+
+#include "GraphicsContext.h"
+
+#include <QPainter>
+#include <QPainterPath>
+
+namespace WebCore {
+
+void SVGResourceClipper::applyClip(GraphicsContext* context, const FloatRect& boundingBox) const
+{
+    if (m_clipData.clipData().size() < 1)
+        return;
+
+    context->beginPath();
+
+    QPainterPath newPath;
+
+    bool heterogenousClipRules = false;
+    WindRule clipRule = m_clipData.clipData()[0].windRule;
+
+    unsigned int clipDataCount = m_clipData.clipData().size();
+    for (unsigned int x = 0; x < clipDataCount; x++) {
+        ClipData clipData = m_clipData.clipData()[x];
+        if (clipData.windRule != clipRule)
+            heterogenousClipRules = true;
+
+        QPainterPath path = *(clipData.path.platformPath());
+        if (path.isEmpty())
+            continue;
+
+        if (!newPath.isEmpty())
+            newPath.closeSubpath();
+
+        // Respect clipping units...
+        QMatrix transform;
+
+        if (clipData.bboxUnits) {
+            transform.translate(boundingBox.x(), boundingBox.y());
+            transform.scale(boundingBox.width(), boundingBox.height());
+        }
+
+        // TODO: support heterogenous clip rules!
+        //clipRule = (clipData.windRule() == RULE_EVENODD ? Qt::OddEvenFill : Qt::WindingFill);
+
+        for (int i = 0; i < path.elementCount(); ++i) {
+            const QPainterPath::Element &cur = path.elementAt(i);
+
+            switch (cur.type) {
+                case QPainterPath::MoveToElement:
+                    newPath.moveTo(QPointF(cur.x, cur.y) * transform);
+                    break;
+                case QPainterPath::LineToElement:
+                    newPath.lineTo(QPointF(cur.x, cur.y) * transform);
+                    break;
+                case QPainterPath::CurveToElement:
+                {
+                    const QPainterPath::Element &c1 = path.elementAt(i + 1);
+                    const QPainterPath::Element &c2 = path.elementAt(i + 2);
+
+                    Q_ASSERT(c1.type == QPainterPath::CurveToDataElement);
+                    Q_ASSERT(c2.type == QPainterPath::CurveToDataElement);
+
+                    newPath.cubicTo(QPointF(cur.x, cur.y) * transform,
+                                    QPointF(c1.x, c1.y) * transform,
+                                    QPointF(c2.x, c2.y) * transform);
+
+                    i += 2;
+                    break;
+                }
+                case QPainterPath::CurveToDataElement:
+                    Q_ASSERT(false);
+                    break;
+            }
+        }
+    }
+
+    if (m_clipData.clipData().size()) {
+        // FIXME!
+        // We don't currently allow for heterogenous clip rules.
+        // we would have to detect such, draw to a mask, and then clip
+        // to that mask
+        // if (!CGContextIsPathEmpty(cgContext)) {
+            if (clipRule == RULE_EVENODD)
+                newPath.setFillRule(Qt::OddEvenFill);
+            else
+                newPath.setFillRule(Qt::WindingFill);
+        // }
+    }
+
+    QPainter* painter(context ? context->platformContext() : 0);
+    Q_ASSERT(painter);
+
+    painter->setClipPath(newPath);
+}
+
+} // namespace WebCore
+
+#endif
+
+// vim:ts=4:noet