auto import from //depot/cupcake/@135843

1 files changed, 274 insertions, 0 deletions

diff --git a/WebCore/rendering/RenderSVGImage.cpp b/WebCore/rendering/RenderSVGImage.cpp
new file mode 100644
index 0000000..345e79f
--- /dev/null
+++ b/WebCore/rendering/RenderSVGImage.cpp
@@ -0,0 +1,274 @@
+/*
+    Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
+    Copyright (C) 2006 Apple Computer, Inc.
+    Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
+    Copyright (C) 2007, 2008 Rob Buis <buis@kde.org>
+
+    This file is part of the WebKit 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
+    along 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 "RenderSVGImage.h"
+
+#include "Attr.h"
+#include "FloatConversion.h"
+#include "GraphicsContext.h"
+#include "PointerEventsHitRules.h"
+#include "SVGImageElement.h"
+#include "SVGLength.h"
+#include "SVGPreserveAspectRatio.h"
+#include "SVGRenderSupport.h"
+#include "SVGResourceClipper.h"
+#include "SVGResourceFilter.h"
+#include "SVGResourceMasker.h"
+
+namespace WebCore {
+
+RenderSVGImage::RenderSVGImage(SVGImageElement* impl)
+    : RenderImage(impl)
+{
+}
+
+RenderSVGImage::~RenderSVGImage()
+{
+}
+
+void RenderSVGImage::adjustRectsForAspectRatio(FloatRect& destRect, FloatRect& srcRect, SVGPreserveAspectRatio* aspectRatio)
+{
+    float origDestWidth = destRect.width();
+    float origDestHeight = destRect.height();
+    if (aspectRatio->meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_MEET) {
+        float widthToHeightMultiplier = srcRect.height() / srcRect.width();
+        if (origDestHeight > (origDestWidth * widthToHeightMultiplier)) {
+            destRect.setHeight(origDestWidth * widthToHeightMultiplier);
+            switch(aspectRatio->align()) {
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
+                    destRect.setY(destRect.y() + origDestHeight / 2.0f - destRect.height() / 2.0f);
+                    break;
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
+                    destRect.setY(destRect.y() + origDestHeight - destRect.height());
+                    break;
+            }
+        }
+        if (origDestWidth > (origDestHeight / widthToHeightMultiplier)) {
+            destRect.setWidth(origDestHeight / widthToHeightMultiplier);
+            switch(aspectRatio->align()) {
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
+                    destRect.setX(destRect.x() + origDestWidth / 2.0f - destRect.width() / 2.0f);
+                    break;
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
+                    destRect.setX(destRect.x() + origDestWidth - destRect.width());
+                    break;
+            }
+        }
+    } else if (aspectRatio->meetOrSlice() == SVGPreserveAspectRatio::SVG_MEETORSLICE_SLICE) {
+        float widthToHeightMultiplier = srcRect.height() / srcRect.width();
+        // if the destination height is less than the height of the image we'll be drawing
+        if (origDestHeight < (origDestWidth * widthToHeightMultiplier)) {
+            float destToSrcMultiplier = srcRect.width() / destRect.width();
+            srcRect.setHeight(destRect.height() * destToSrcMultiplier);
+            switch(aspectRatio->align()) {
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
+                    srcRect.setY(destRect.y() + image()->height() / 2.0f - srcRect.height() / 2.0f);
+                    break;
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMINYMAX:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
+                    srcRect.setY(destRect.y() + image()->height() - srcRect.height());
+                    break;
+            }
+        }
+        // if the destination width is less than the width of the image we'll be drawing
+        if (origDestWidth < (origDestHeight / widthToHeightMultiplier)) {
+            float destToSrcMultiplier = srcRect.height() / destRect.height();
+            srcRect.setWidth(destRect.width() * destToSrcMultiplier);
+            switch(aspectRatio->align()) {
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMIN:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMIDYMAX:
+                    srcRect.setX(destRect.x() + image()->width() / 2.0f - srcRect.width() / 2.0f);
+                    break;
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMIN:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMID:
+                case SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_XMAXYMAX:
+                    srcRect.setX(destRect.x() + image()->width() - srcRect.width());
+                    break;
+            }
+        }
+    }
+}
+
+bool RenderSVGImage::calculateLocalTransform()
+{
+    AffineTransform oldTransform = m_localTransform;
+    m_localTransform = static_cast<SVGStyledTransformableElement*>(element())->animatedLocalTransform();
+    return (m_localTransform != oldTransform);
+}
+
+void RenderSVGImage::layout()
+{
+    ASSERT(needsLayout());
+    
+    IntRect oldBounds;
+    IntRect oldOutlineBox;
+    bool checkForRepaint = checkForRepaintDuringLayout();
+    if (checkForRepaint) {
+        oldBounds = absoluteClippedOverflowRect();
+        oldOutlineBox = absoluteOutlineBox();
+    }
+    
+    calculateLocalTransform();
+    
+    // minimum height
+    m_height = errorOccurred() ? intrinsicSize().height() : 0;
+
+    calcWidth();
+    calcHeight();
+
+    SVGImageElement* image = static_cast<SVGImageElement*>(node());
+    m_localBounds = FloatRect(image->x().value(image), image->y().value(image), image->width().value(image), image->height().value(image));
+
+    calculateAbsoluteBounds();
+
+    if (checkForRepaint)
+        repaintAfterLayoutIfNeeded(oldBounds, oldOutlineBox);
+
+    setNeedsLayout(false);
+}
+
+void RenderSVGImage::paint(PaintInfo& paintInfo, int, int)
+{
+    if (paintInfo.context->paintingDisabled() || style()->visibility() == HIDDEN)
+        return;
+
+    paintInfo.context->save();
+    paintInfo.context->concatCTM(localTransform());
+
+    if (paintInfo.phase == PaintPhaseForeground) {
+        SVGResourceFilter* filter = 0;
+
+        PaintInfo savedInfo(paintInfo);
+
+        prepareToRenderSVGContent(this, paintInfo, m_localBounds, filter);
+
+        FloatRect destRect = m_localBounds;
+        FloatRect srcRect(0, 0, image()->width(), image()->height());
+
+        SVGImageElement* imageElt = static_cast<SVGImageElement*>(node());
+        if (imageElt->preserveAspectRatio()->align() != SVGPreserveAspectRatio::SVG_PRESERVEASPECTRATIO_NONE)
+            adjustRectsForAspectRatio(destRect, srcRect, imageElt->preserveAspectRatio());
+
+        paintInfo.context->drawImage(image(), destRect, srcRect);
+
+        finishRenderSVGContent(this, paintInfo, m_localBounds, filter, savedInfo.context);
+    }
+    
+    paintInfo.context->restore();
+}
+
+bool RenderSVGImage::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int _x, int _y, int, int, HitTestAction hitTestAction)
+{
+    // We only draw in the forground phase, so we only hit-test then.
+    if (hitTestAction != HitTestForeground)
+        return false;
+
+    PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_IMAGE_HITTESTING, style()->svgStyle()->pointerEvents());
+    
+    bool isVisible = (style()->visibility() == VISIBLE);
+    if (isVisible || !hitRules.requireVisible) {
+        double localX, localY;
+        absoluteTransform().inverse().map(_x, _y, &localX, &localY);
+
+        if (hitRules.canHitFill) {
+            if (m_localBounds.contains(narrowPrecisionToFloat(localX), narrowPrecisionToFloat(localY))) {
+                updateHitTestResult(result, IntPoint(_x, _y));
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+bool RenderSVGImage::requiresLayer()
+{
+    return false;
+}
+
+FloatRect RenderSVGImage::relativeBBox(bool) const
+{
+    return m_localBounds;
+}
+
+void RenderSVGImage::imageChanged(WrappedImagePtr image)
+{
+    RenderImage::imageChanged(image);
+
+    // We override to invalidate a larger rect, since SVG images can draw outside their "bounds"
+    repaintRectangle(absoluteClippedOverflowRect());
+}
+
+void RenderSVGImage::calculateAbsoluteBounds()
+{
+    FloatRect absoluteRect = absoluteTransform().mapRect(relativeBBox(true));
+
+#if ENABLE(SVG_FILTERS)
+    // Filters can expand the bounding box
+    SVGResourceFilter* filter = getFilterById(document(), style()->svgStyle()->filter());
+    if (filter)
+        absoluteRect.unite(filter->filterBBoxForItemBBox(absoluteRect));
+#endif
+
+    if (!absoluteRect.isEmpty())
+        absoluteRect.inflate(1); // inflate 1 pixel for antialiasing
+
+    m_absoluteBounds = enclosingIntRect(absoluteRect);
+}
+
+IntRect RenderSVGImage::absoluteClippedOverflowRect()
+{
+    return m_absoluteBounds;
+}
+
+void RenderSVGImage::addFocusRingRects(GraphicsContext* graphicsContext, int tx, int ty)
+{
+    // this is called from paint() after the localTransform has already been applied
+    IntRect contentRect = enclosingIntRect(relativeBBox());
+    graphicsContext->addFocusRingRect(contentRect);
+}
+
+void RenderSVGImage::absoluteRects(Vector<IntRect>& rects, int, int, bool)
+{
+    rects.append(absoluteClippedOverflowRect());
+}
+
+}
+
+#endif // ENABLE(SVG)