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/*
* Copyright (C) 2007, 2008 Rob Buis <buis@kde.org>
* (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
* (C) 2007 Eric Seidel <eric@webkit.org>
* Copyright (C) 2009 Google, Inc. All rights reserved.
*
* 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 "SVGRenderSupport.h"
#include "ImageBuffer.h"
#include "RenderObject.h"
#include "RenderSVGContainer.h"
#include "RenderView.h"
#include "SVGResourceClipper.h"
#include "SVGResourceFilter.h"
#include "SVGResourceMasker.h"
#include "SVGStyledElement.h"
#include "SVGURIReference.h"
#include "TransformState.h"
#include "TransformationMatrix.h"
#include <wtf/UnusedParam.h>
namespace WebCore {
IntRect SVGRenderBase::clippedOverflowRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer)
{
// Return early for any cases where we don't actually paint
if (object->style()->visibility() != VISIBLE && !object->enclosingLayer()->hasVisibleContent())
return IntRect();
// Pass our local paint rect to computeRectForRepaint() which will
// map to parent coords and recurse up the parent chain.
IntRect repaintRect = enclosingIntRect(object->repaintRectInLocalCoordinates());
object->computeRectForRepaint(repaintContainer, repaintRect);
return repaintRect;
}
void SVGRenderBase::computeRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)
{
// Translate to coords in our parent renderer, and then call computeRectForRepaint on our parent
repaintRect = object->localToParentTransform().mapRect(repaintRect);
object->parent()->computeRectForRepaint(repaintContainer, repaintRect, fixed);
}
void SVGRenderBase::mapLocalToContainer(const RenderObject* object, RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState)
{
ASSERT(!fixed); // We should have no fixed content in the SVG rendering tree.
ASSERT(useTransforms); // mapping a point through SVG w/o respecting trasnforms is useless.
transformState.applyTransform(object->localToParentTransform());
object->parent()->mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState);
}
void SVGRenderBase::prepareToRenderSVGContent(RenderObject* object, RenderObject::PaintInfo& paintInfo, const FloatRect& boundingBox, SVGResourceFilter*& filter, SVGResourceFilter* rootFilter)
{
#if !ENABLE(FILTERS)
UNUSED_PARAM(filter);
UNUSED_PARAM(rootFilter);
#endif
ASSERT(object);
SVGElement* svgElement = static_cast<SVGElement*>(object->node());
ASSERT(svgElement && svgElement->document() && svgElement->isStyled());
SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement);
const RenderStyle* style = object->style();
ASSERT(style);
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
// Setup transparency layers before setting up filters!
float opacity = style->opacity();
if (opacity < 1.0f) {
paintInfo.context->clip(enclosingIntRect(boundingBox));
paintInfo.context->beginTransparencyLayer(opacity);
}
if (ShadowData* shadow = svgStyle->shadow()) {
int xShift = shadow->x < 0 ? shadow->x : 0;
int yShift = shadow->y < 0 ? shadow->y :0;
int widthShift = shadow->x < 0 ? 0 : shadow->x;
int heightShift = shadow->y < 0 ? 0 : shadow->y;
FloatRect shadowRect = FloatRect(boundingBox.x() + xShift, boundingBox.y() + yShift,
boundingBox.width() + widthShift, boundingBox.height() + heightShift);
paintInfo.context->clip(enclosingIntRect(shadowRect));
paintInfo.context->setShadow(IntSize(shadow->x, shadow->y), shadow->blur, shadow->color, style->colorSpace());
paintInfo.context->beginTransparencyLayer(1.0f);
}
#if ENABLE(FILTERS)
AtomicString filterId(svgStyle->filter());
#endif
AtomicString clipperId(svgStyle->clipPath());
AtomicString maskerId(svgStyle->maskElement());
Document* document = object->document();
#if ENABLE(FILTERS)
SVGResourceFilter* newFilter = getFilterById(document, filterId);
if (newFilter == rootFilter) {
// Catch <text filter="url(#foo)">Test<tspan filter="url(#foo)">123</tspan></text>.
// The filter is NOT meant to be applied twice in that case!
filter = 0;
filterId = String();
} else
filter = newFilter;
#endif
SVGResourceClipper* clipper = getClipperById(document, clipperId);
SVGResourceMasker* masker = getMaskerById(document, maskerId);
#if ENABLE(FILTERS)
if (filter) {
filter->addClient(styledElement);
filter->prepareFilter(paintInfo.context, object);
} else if (!filterId.isEmpty())
svgElement->document()->accessSVGExtensions()->addPendingResource(filterId, styledElement);
#endif
if (clipper) {
clipper->addClient(styledElement);
clipper->applyClip(paintInfo.context, boundingBox);
} else if (!clipperId.isEmpty())
svgElement->document()->accessSVGExtensions()->addPendingResource(clipperId, styledElement);
if (masker) {
masker->addClient(styledElement);
masker->applyMask(paintInfo.context, boundingBox);
} else if (!maskerId.isEmpty())
svgElement->document()->accessSVGExtensions()->addPendingResource(maskerId, styledElement);
}
void SVGRenderBase::finishRenderSVGContent(RenderObject* object, RenderObject::PaintInfo& paintInfo, SVGResourceFilter*& filter, GraphicsContext* savedContext)
{
#if !ENABLE(FILTERS)
UNUSED_PARAM(filter);
UNUSED_PARAM(savedContext);
#endif
ASSERT(object);
const RenderStyle* style = object->style();
ASSERT(style);
#if ENABLE(FILTERS)
if (filter) {
filter->applyFilter(paintInfo.context, object);
paintInfo.context = savedContext;
}
#endif
float opacity = style->opacity();
if (opacity < 1.0f)
paintInfo.context->endTransparencyLayer();
// This needs to be done separately from opacity, because if both properties are set,
// then the transparency layers are nested.
if (style->svgStyle()->shadow())
paintInfo.context->endTransparencyLayer();
}
void renderSubtreeToImage(ImageBuffer* image, RenderObject* item)
{
ASSERT(item);
ASSERT(image);
ASSERT(image->context());
RenderObject::PaintInfo info(image->context(), IntRect(), PaintPhaseForeground, 0, 0, 0);
// FIXME: isSVGContainer returns true for RenderSVGViewportContainer, so if this is ever
// called with one of those, we will read from the wrong offset in an object due to a bad cast.
RenderSVGContainer* svgContainer = 0;
if (item && item->isSVGContainer())
svgContainer = toRenderSVGContainer(item);
bool drawsContents = svgContainer ? svgContainer->drawsContents() : false;
if (svgContainer && !drawsContents)
svgContainer->setDrawsContents(true);
item->layoutIfNeeded();
item->paint(info, 0, 0);
if (svgContainer && !drawsContents)
svgContainer->setDrawsContents(false);
}
void clampImageBufferSizeToViewport(FrameView* frameView, IntSize& size)
{
if (!frameView)
return;
int viewWidth = frameView->visibleWidth();
int viewHeight = frameView->visibleHeight();
if (size.width() > viewWidth)
size.setWidth(viewWidth);
if (size.height() > viewHeight)
size.setHeight(viewHeight);
}
FloatRect SVGRenderBase::computeContainerBoundingBox(const RenderObject* container, bool includeAllPaintedContent)
{
FloatRect boundingBox;
RenderObject* current = container->firstChild();
for (; current != 0; current = current->nextSibling()) {
FloatRect childBBox = includeAllPaintedContent ? current->repaintRectInLocalCoordinates() : current->objectBoundingBox();
FloatRect childBBoxInLocalCoords = current->localToParentTransform().mapRect(childBBox);
boundingBox.unite(childBBoxInLocalCoords);
}
return boundingBox;
}
FloatRect SVGRenderBase::filterBoundingBoxForRenderer(const RenderObject* object)
{
#if ENABLE(FILTERS)
SVGResourceFilter* filter = getFilterById(object->document(), object->style()->svgStyle()->filter());
if (filter)
return filter->filterBoundingBox();
#else
UNUSED_PARAM(object);
#endif
return FloatRect();
}
void applyTransformToPaintInfo(RenderObject::PaintInfo& paintInfo, const TransformationMatrix& localToAncestorTransform)
{
if (localToAncestorTransform.isIdentity())
return;
paintInfo.context->concatCTM(localToAncestorTransform);
paintInfo.rect = localToAncestorTransform.inverse().mapRect(paintInfo.rect);
}
} // namespace WebCore
#endif // ENABLE(SVG)
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