author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 04 Oct 2010 01:32:07 +0300 | |
changeset 2 | 303757a437d3 |
parent 0 | 4f2f89ce4247 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (C) 2007, 2008 Rob Buis <buis@kde.org> |
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* (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> |
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* (C) 2007 Eric Seidel <eric@webkit.org> |
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* (C) 2009 Google, Inc. All rights reserved. |
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* (C) 2009 Dirk Schulze <krit@webkit.org> |
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* Copyright (C) Research In Motion Limited 2009-2010. All rights reserved. |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public License |
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* along with this library; see the file COPYING.LIB. If not, write to |
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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* Boston, MA 02110-1301, USA. |
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* |
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*/ |
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#include "config.h" |
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#if ENABLE(SVG) |
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#include "SVGRenderSupport.h" |
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#include "FrameView.h" |
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#include "ImageBuffer.h" |
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#include "NodeRenderStyle.h" |
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#include "RenderLayer.h" |
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#include "RenderPath.h" |
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#include "RenderSVGContainer.h" |
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#include "RenderSVGResource.h" |
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#include "RenderSVGResourceClipper.h" |
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#include "RenderSVGResourceFilter.h" |
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#include "RenderSVGResourceMarker.h" |
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#include "RenderSVGResourceMasker.h" |
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#include "RenderSVGRoot.h" |
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#include "SVGStyledElement.h" |
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#include "TransformState.h" |
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#include <wtf/UnusedParam.h> |
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namespace WebCore { |
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IntRect SVGRenderSupport::clippedOverflowRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer) |
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{ |
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// Return early for any cases where we don't actually paint |
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if (object->style()->visibility() != VISIBLE && !object->enclosingLayer()->hasVisibleContent()) |
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return IntRect(); |
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// Pass our local paint rect to computeRectForRepaint() which will |
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// map to parent coords and recurse up the parent chain. |
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IntRect repaintRect = enclosingIntRect(object->repaintRectInLocalCoordinates()); |
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object->computeRectForRepaint(repaintContainer, repaintRect); |
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return repaintRect; |
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} |
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void SVGRenderSupport::computeRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed) |
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{ |
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object->style()->svgStyle()->inflateForShadow(repaintRect); |
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// Translate to coords in our parent renderer, and then call computeRectForRepaint on our parent |
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repaintRect = object->localToParentTransform().mapRect(repaintRect); |
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object->parent()->computeRectForRepaint(repaintContainer, repaintRect, fixed); |
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} |
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void SVGRenderSupport::mapLocalToContainer(const RenderObject* object, RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState) |
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{ |
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ASSERT(!fixed); // We should have no fixed content in the SVG rendering tree. |
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ASSERT(useTransforms); // Mapping a point through SVG w/o respecting transforms is useless. |
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transformState.applyTransform(object->localToParentTransform()); |
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object->parent()->mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState); |
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} |
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bool SVGRenderSupport::prepareToRenderSVGContent(RenderObject* object, PaintInfo& paintInfo) |
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{ |
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ASSERT(object); |
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SVGElement* svgElement = static_cast<SVGElement*>(object->node()); |
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ASSERT(svgElement && svgElement->document() && svgElement->isStyled()); |
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SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement); |
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RenderStyle* style = object->style(); |
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ASSERT(style); |
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const SVGRenderStyle* svgStyle = style->svgStyle(); |
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ASSERT(svgStyle); |
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FloatRect repaintRect; |
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// Setup transparency layers before setting up SVG resources! |
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float opacity = style->opacity(); |
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if (opacity < 1) { |
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repaintRect = object->repaintRectInLocalCoordinates(); |
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paintInfo.context->clip(repaintRect); |
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paintInfo.context->beginTransparencyLayer(opacity); |
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} |
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101 |
|
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if (const ShadowData* shadow = svgStyle->shadow()) { |
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// Eventually compute repaint rect, if not done so far. |
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if (opacity >= 1) |
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repaintRect = object->repaintRectInLocalCoordinates(); |
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|
106 |
|
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paintInfo.context->clip(repaintRect); |
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paintInfo.context->setShadow(IntSize(shadow->x(), shadow->y()), shadow->blur(), shadow->color(), style->colorSpace()); |
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paintInfo.context->beginTransparencyLayer(1); |
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110 |
} |
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111 |
|
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Document* document = object->document(); |
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113 |
|
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if (svgStyle->hasMasker()) { |
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AtomicString maskerId(svgStyle->maskerResource()); |
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if (RenderSVGResourceMasker* masker = getRenderSVGResourceById<RenderSVGResourceMasker>(document, maskerId)) { |
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if (!masker->applyResource(object, style, paintInfo.context, ApplyToDefaultMode)) |
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return false; |
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} else |
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document->accessSVGExtensions()->addPendingResource(maskerId, styledElement); |
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} |
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122 |
|
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if (svgStyle->hasClipper()) { |
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AtomicString clipperId(svgStyle->clipperResource()); |
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if (RenderSVGResourceClipper* clipper = getRenderSVGResourceById<RenderSVGResourceClipper>(document, clipperId)) |
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clipper->applyResource(object, style, paintInfo.context, ApplyToDefaultMode); |
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127 |
else |
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document->accessSVGExtensions()->addPendingResource(clipperId, styledElement); |
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129 |
} |
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130 |
|
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#if ENABLE(FILTERS) |
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if (svgStyle->hasFilter()) { |
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AtomicString filterId(svgStyle->filterResource()); |
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if (RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(document, filterId)) { |
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if (!filter->applyResource(object, style, paintInfo.context, ApplyToDefaultMode)) |
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return false; |
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} else |
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document->accessSVGExtensions()->addPendingResource(filterId, styledElement); |
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139 |
} |
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#endif |
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141 |
|
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return true; |
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} |
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144 |
|
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void SVGRenderSupport::finishRenderSVGContent(RenderObject* object, PaintInfo& paintInfo, GraphicsContext* savedContext) |
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{ |
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#if !ENABLE(FILTERS) |
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UNUSED_PARAM(savedContext); |
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#endif |
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150 |
|
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ASSERT(object); |
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152 |
|
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const RenderStyle* style = object->style(); |
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ASSERT(style); |
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155 |
|
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const SVGRenderStyle* svgStyle = style->svgStyle(); |
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ASSERT(svgStyle); |
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158 |
|
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#if ENABLE(FILTERS) |
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if (svgStyle->hasFilter()) { |
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AtomicString filterId(svgStyle->filterResource()); |
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if (RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(object->document(), filterId)) { |
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filter->postApplyResource(object, paintInfo.context, ApplyToDefaultMode); |
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paintInfo.context = savedContext; |
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165 |
} |
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166 |
} |
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#endif |
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168 |
|
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float opacity = style->opacity(); |
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if (opacity < 1) |
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paintInfo.context->endTransparencyLayer(); |
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172 |
|
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// This needs to be done separately from opacity, because if both properties are set, |
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// then the transparency layers are nested. |
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if (svgStyle->shadow()) |
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paintInfo.context->endTransparencyLayer(); |
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177 |
} |
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178 |
|
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179 |
void SVGRenderSupport::renderSubtreeToImage(ImageBuffer* image, RenderObject* item) |
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180 |
{ |
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ASSERT(item); |
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ASSERT(image); |
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ASSERT(image->context()); |
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184 |
|
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185 |
// FIXME: This sets the rect to the viewable area of the current frame. This |
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// is used to support text drawings to the ImageBuffer. See bug 30399. |
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187 |
IntRect rect; |
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FrameView* frameView = item->document()->view(); |
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if (frameView) |
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rect = IntRect(0, 0, frameView->visibleWidth(), frameView->visibleHeight()); |
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PaintInfo info(image->context(), rect, PaintPhaseForeground, 0, 0, 0); |
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192 |
|
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193 |
// FIXME: isSVGContainer returns true for RenderSVGViewportContainer, so if this is ever |
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// called with one of those, we will read from the wrong offset in an object due to a bad cast. |
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RenderSVGContainer* svgContainer = 0; |
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if (item && item->isSVGContainer()) |
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svgContainer = toRenderSVGContainer(item); |
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198 |
|
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199 |
bool drawsContents = svgContainer ? svgContainer->drawsContents() : false; |
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200 |
if (svgContainer && !drawsContents) |
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201 |
svgContainer->setDrawsContents(true); |
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|
202 |
|
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item->layoutIfNeeded(); |
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|
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item->paint(info, 0, 0); |
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|
205 |
|
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|
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if (svgContainer && !drawsContents) |
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|
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svgContainer->setDrawsContents(false); |
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|
208 |
} |
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|
209 |
|
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|
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FloatRect SVGRenderSupport::computeContainerBoundingBox(const RenderObject* container, ContainerBoundingBoxMode mode) |
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211 |
{ |
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FloatRect boundingBox; |
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|
213 |
|
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for (RenderObject* current = container->firstChild(); current; current = current->nextSibling()) { |
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FloatRect childBoundingBox; |
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|
216 |
|
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switch (mode) { |
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|
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case ObjectBoundingBox: |
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childBoundingBox = current->objectBoundingBox(); |
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break; |
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case StrokeBoundingBox: |
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childBoundingBox = current->strokeBoundingBox(); |
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223 |
break; |
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224 |
case RepaintBoundingBox: |
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childBoundingBox = current->repaintRectInLocalCoordinates(); |
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break; |
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} |
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|
228 |
|
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|
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boundingBox.unite(current->localToParentTransform().mapRect(childBoundingBox)); |
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|
230 |
} |
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|
231 |
|
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return boundingBox; |
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233 |
} |
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|
234 |
|
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static inline RenderSVGRoot* svgRootTreeObject(RenderObject* start) |
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236 |
{ |
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237 |
while (start && !start->isSVGRoot()) |
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|
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start = start->parent(); |
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|
239 |
|
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ASSERT(start); |
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|
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ASSERT(start->isSVGRoot()); |
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|
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return toRenderSVGRoot(start); |
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|
243 |
} |
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|
244 |
|
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|
245 |
void SVGRenderSupport::layoutChildren(RenderObject* start, bool selfNeedsLayout) |
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|
246 |
{ |
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|
247 |
bool layoutSizeChanged = svgRootTreeObject(start)->isLayoutSizeChanged(); |
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|
248 |
|
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|
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for (RenderObject* child = start->firstChild(); child; child = child->nextSibling()) { |
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|
250 |
bool needsLayout = selfNeedsLayout; |
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|
251 |
|
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|
252 |
if (layoutSizeChanged) { |
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Revision: 201037
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|
253 |
// When selfNeedsLayout is false and the layout size changed, we have to check whether this child uses relative lengths |
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|
254 |
if (SVGElement* element = child->node()->isSVGElement() ? static_cast<SVGElement*>(child->node()) : 0) { |
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|
255 |
if (element->isStyled() && static_cast<SVGStyledElement*>(element)->hasRelativeLengths()) { |
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Revision: 201037
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|
256 |
// When the layout size changed and when using relative values tell the RenderPath to update its Path object |
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Revision: 201037
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|
257 |
if (child->isRenderPath()) |
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Revision: 201037
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|
258 |
toRenderPath(child)->setNeedsPathUpdate(); |
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diff
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|
259 |
|
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Revision: 201037
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|
260 |
needsLayout = true; |
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Revision: 201037
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|
261 |
} |
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Revision: 201037
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diff
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|
262 |
} |
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Revision: 201037
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diff
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|
263 |
} |
4f2f89ce4247
Revision: 201037
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diff
changeset
|
264 |
|
4f2f89ce4247
Revision: 201037
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|
265 |
if (needsLayout) { |
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Revision: 201037
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|
266 |
child->setNeedsLayout(true, false); |
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Revision: 201037
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|
267 |
child->layout(); |
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Revision: 201037
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|
268 |
} else |
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Revision: 201037
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|
269 |
child->layoutIfNeeded(); |
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Revision: 201037
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diff
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|
270 |
|
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Revision: 201037
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|
271 |
ASSERT(!child->needsLayout()); |
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Revision: 201037
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|
272 |
} |
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Revision: 201037
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diff
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|
273 |
} |
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Revision: 201037
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diff
changeset
|
274 |
|
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Revision: 201037
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|
275 |
bool SVGRenderSupport::isOverflowHidden(const RenderObject* object) |
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Revision: 201037
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|
276 |
{ |
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Revision: 201037
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|
277 |
// SVG doesn't support independent x/y overflow |
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Revision: 201037
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|
278 |
ASSERT(object->style()->overflowX() == object->style()->overflowY()); |
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Revision: 201037
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|
279 |
|
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Revision: 201037
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|
280 |
// OSCROLL is never set for SVG - see CSSStyleSelector::adjustRenderStyle |
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Revision: 201037
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|
281 |
ASSERT(object->style()->overflowX() != OSCROLL); |
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Revision: 201037
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diff
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|
282 |
|
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Revision: 201037
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diff
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|
283 |
// RenderSVGRoot should never query for overflow state - it should always clip itself to the initial viewport size. |
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Revision: 201037
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|
284 |
ASSERT(!object->isRoot()); |
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Revision: 201037
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diff
changeset
|
285 |
|
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Revision: 201037
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diff
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|
286 |
return object->style()->overflowX() == OHIDDEN; |
4f2f89ce4247
Revision: 201037
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parents:
diff
changeset
|
287 |
} |
4f2f89ce4247
Revision: 201037
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diff
changeset
|
288 |
|
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Revision: 201037
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diff
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|
289 |
void SVGRenderSupport::intersectRepaintRectWithResources(const RenderObject* object, FloatRect& repaintRect) |
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Revision: 201037
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|
290 |
{ |
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Revision: 201037
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|
291 |
ASSERT(object); |
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Revision: 201037
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|
292 |
ASSERT(object->style()); |
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Revision: 201037
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diff
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|
293 |
const SVGRenderStyle* svgStyle = object->style()->svgStyle(); |
4f2f89ce4247
Revision: 201037
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|
294 |
if (!svgStyle) |
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Revision: 201037
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|
295 |
return; |
4f2f89ce4247
Revision: 201037
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diff
changeset
|
296 |
|
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Revision: 201037
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diff
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|
297 |
RenderObject* renderer = const_cast<RenderObject*>(object); |
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Revision: 201037
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diff
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|
298 |
#if ENABLE(FILTERS) |
4f2f89ce4247
Revision: 201037
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diff
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|
299 |
if (svgStyle->hasFilter()) { |
4f2f89ce4247
Revision: 201037
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|
300 |
if (RenderSVGResourceFilter* filter = getRenderSVGResourceById<RenderSVGResourceFilter>(object->document(), svgStyle->filterResource())) |
4f2f89ce4247
Revision: 201037
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diff
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|
301 |
repaintRect = filter->resourceBoundingBox(renderer); |
4f2f89ce4247
Revision: 201037
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parents:
diff
changeset
|
302 |
} |
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Revision: 201037
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diff
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|
303 |
#endif |
4f2f89ce4247
Revision: 201037
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diff
changeset
|
304 |
|
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Revision: 201037
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diff
changeset
|
305 |
if (svgStyle->hasClipper()) { |
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if (RenderSVGResourceClipper* clipper = getRenderSVGResourceById<RenderSVGResourceClipper>(object->document(), svgStyle->clipperResource())) |
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repaintRect.intersect(clipper->resourceBoundingBox(renderer)); |
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} |
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|
309 |
|
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if (svgStyle->hasMasker()) { |
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if (RenderSVGResourceMasker* masker = getRenderSVGResourceById<RenderSVGResourceMasker>(object->document(), svgStyle->maskerResource())) |
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repaintRect.intersect(masker->resourceBoundingBox(renderer)); |
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313 |
} |
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|
314 |
|
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svgStyle->inflateForShadow(repaintRect); |
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|
316 |
} |
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|
317 |
|
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bool SVGRenderSupport::pointInClippingArea(const RenderObject* object, const FloatPoint& point) |
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319 |
{ |
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ASSERT(object); |
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ASSERT(object->style()); |
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|
322 |
|
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Document* document = object->document(); |
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ASSERT(document); |
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|
325 |
|
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const SVGRenderStyle* svgStyle = object->style()->svgStyle(); |
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ASSERT(svgStyle); |
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|
328 |
|
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// We just take clippers into account to determine if a point is on the node. The Specification may |
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// change later and we also need to check maskers. |
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331 |
if (svgStyle->hasClipper()) { |
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if (RenderSVGResourceClipper* clipper = getRenderSVGResourceById<RenderSVGResourceClipper>(document, svgStyle->clipperResource())) |
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return clipper->hitTestClipContent(object->objectBoundingBox(), point); |
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|
334 |
} |
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|
335 |
|
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return true; |
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|
337 |
} |
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|
338 |
|
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|
339 |
DashArray SVGRenderSupport::dashArrayFromRenderingStyle(const RenderStyle* style, RenderStyle* rootStyle) |
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340 |
{ |
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341 |
DashArray array; |
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|
342 |
|
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CSSValueList* dashes = style->svgStyle()->strokeDashArray(); |
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344 |
if (!dashes) |
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return array; |
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|
346 |
|
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347 |
CSSPrimitiveValue* dash = 0; |
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unsigned long len = dashes->length(); |
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for (unsigned long i = 0; i < len; ++i) { |
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dash = static_cast<CSSPrimitiveValue*>(dashes->itemWithoutBoundsCheck(i)); |
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|
351 |
if (!dash) |
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|
352 |
continue; |
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|
353 |
|
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|
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array.append(dash->computeLengthFloat(const_cast<RenderStyle*>(style), rootStyle)); |
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|
355 |
} |
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|
356 |
|
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|
357 |
return array; |
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|
358 |
} |
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|
359 |
|
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|
360 |
void SVGRenderSupport::applyStrokeStyleToContext(GraphicsContext* context, const RenderStyle* style, const RenderObject* object) |
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|
361 |
{ |
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|
362 |
context->setStrokeThickness(SVGRenderStyle::cssPrimitiveToLength(object, style->svgStyle()->strokeWidth(), 1.0f)); |
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|
363 |
context->setLineCap(style->svgStyle()->capStyle()); |
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|
364 |
context->setLineJoin(style->svgStyle()->joinStyle()); |
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|
365 |
if (style->svgStyle()->joinStyle() == MiterJoin) |
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|
366 |
context->setMiterLimit(style->svgStyle()->strokeMiterLimit()); |
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|
367 |
|
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|
368 |
const DashArray& dashes = dashArrayFromRenderingStyle(object->style(), object->document()->documentElement()->renderStyle()); |
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|
369 |
float dashOffset = SVGRenderStyle::cssPrimitiveToLength(object, style->svgStyle()->strokeDashOffset(), 0.0f); |
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|
370 |
if (dashes.isEmpty()) |
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|
371 |
context->setStrokeStyle(SolidStroke); |
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|
372 |
else |
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|
373 |
context->setLineDash(dashes, dashOffset); |
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|
374 |
} |
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|
375 |
|
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|
376 |
const RenderObject* SVGRenderSupport::findTextRootObject(const RenderObject* start) |
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|
377 |
{ |
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Revision: 201037
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|
378 |
while (start && !start->isSVGText()) |
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|
379 |
start = start->parent(); |
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|
380 |
ASSERT(start); |
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|
381 |
ASSERT(start->isSVGText()); |
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|
382 |
|
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|
383 |
return start; |
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|
384 |
} |
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diff
changeset
|
385 |
|
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Revision: 201037
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|
386 |
} |
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|
387 |
|
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Revision: 201037
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|
388 |
#endif |