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/*
* Copyright (C) 2004, 2005, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Rob Buis <buis@kde.org>
* Copyright (C) Research In Motion Limited 2009-2010. 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 "RenderSVGResourceMarker.h"
#include "GraphicsContext.h"
#include "RenderSVGContainer.h"
#include "RenderSVGRoot.h"
#include "SVGElement.h"
#include "SVGGraphicsElement.h"
#include "SVGMarkerElement.h"
#include "SVGRenderSupport.h"
#include "SVGStyledElement.h"
#include <wtf/StackStats.h>
namespace WebCore {
RenderSVGResourceType RenderSVGResourceMarker::s_resourceType = MarkerResourceType;
RenderSVGResourceMarker::RenderSVGResourceMarker(SVGMarkerElement* node)
: RenderSVGResourceContainer(node)
{
}
RenderSVGResourceMarker::~RenderSVGResourceMarker()
{
}
void RenderSVGResourceMarker::layout()
{
StackStats::LayoutCheckPoint layoutCheckPoint;
// Invalidate all resources if our layout changed.
if (everHadLayout() && selfNeedsLayout())
RenderSVGRoot::addResourceForClientInvalidation(this);
// RenderSVGHiddenContainer overwrites layout(). We need the
// layouting of RenderSVGContainer for calculating local
// transformations and repaint.
RenderSVGContainer::layout();
}
void RenderSVGResourceMarker::removeAllClientsFromCache(bool markForInvalidation)
{
markAllClientsForInvalidation(markForInvalidation ? LayoutAndBoundariesInvalidation : ParentOnlyInvalidation);
}
void RenderSVGResourceMarker::removeClientFromCache(RenderObject* client, bool markForInvalidation)
{
ASSERT(client);
markClientForInvalidation(client, markForInvalidation ? BoundariesInvalidation : ParentOnlyInvalidation);
}
void RenderSVGResourceMarker::applyViewportClip(PaintInfo& paintInfo)
{
if (SVGRenderSupport::isOverflowHidden(this))
paintInfo.context->clip(m_viewport);
}
FloatRect RenderSVGResourceMarker::markerBoundaries(const AffineTransform& markerTransformation) const
{
FloatRect coordinates = RenderSVGContainer::repaintRectInLocalCoordinates();
// Map repaint rect into parent coordinate space, in which the marker boundaries have to be evaluated
coordinates = localToParentTransform().mapRect(coordinates);
return markerTransformation.mapRect(coordinates);
}
const AffineTransform& RenderSVGResourceMarker::localToParentTransform() const
{
m_localToParentTransform = AffineTransform::translation(m_viewport.x(), m_viewport.y()) * viewportTransform();
return m_localToParentTransform;
// If this class were ever given a localTransform(), then the above would read:
// return viewportTranslation * localTransform() * viewportTransform();
}
FloatPoint RenderSVGResourceMarker::referencePoint() const
{
SVGMarkerElement* marker = toSVGMarkerElement(node());
ASSERT(marker);
SVGLengthContext lengthContext(marker);
return FloatPoint(marker->refX().value(lengthContext), marker->refY().value(lengthContext));
}
float RenderSVGResourceMarker::angle() const
{
SVGMarkerElement* marker = toSVGMarkerElement(node());
ASSERT(marker);
float angle = -1;
if (marker->orientType() == SVGMarkerOrientAngle)
angle = marker->orientAngle().value();
return angle;
}
AffineTransform RenderSVGResourceMarker::markerTransformation(const FloatPoint& origin, float autoAngle, float strokeWidth) const
{
SVGMarkerElement* marker = toSVGMarkerElement(node());
ASSERT(marker);
float markerAngle = angle();
bool useStrokeWidth = marker->markerUnits() == SVGMarkerUnitsStrokeWidth;
AffineTransform transform;
transform.translate(origin.x(), origin.y());
transform.rotate(markerAngle == -1 ? autoAngle : markerAngle);
transform = markerContentTransformation(transform, referencePoint(), useStrokeWidth ? strokeWidth : -1);
return transform;
}
void RenderSVGResourceMarker::draw(PaintInfo& paintInfo, const AffineTransform& transform)
{
// An empty viewBox disables rendering.
SVGMarkerElement* marker = toSVGMarkerElement(toSVGElement(node()));
ASSERT(marker);
if (marker->hasAttribute(SVGNames::viewBoxAttr) && marker->viewBoxIsValid() && marker->viewBox().isEmpty())
return;
PaintInfo info(paintInfo);
GraphicsContextStateSaver stateSaver(*info.context);
info.applyTransform(transform);
RenderSVGContainer::paint(info, IntPoint());
}
AffineTransform RenderSVGResourceMarker::markerContentTransformation(const AffineTransform& contentTransformation, const FloatPoint& origin, float strokeWidth) const
{
// The 'origin' coordinate maps to SVGs refX/refY, given in coordinates relative to the viewport established by the marker
FloatPoint mappedOrigin = viewportTransform().mapPoint(origin);
AffineTransform transformation = contentTransformation;
if (strokeWidth != -1)
transformation.scaleNonUniform(strokeWidth, strokeWidth);
transformation.translate(-mappedOrigin.x(), -mappedOrigin.y());
return transformation;
}
AffineTransform RenderSVGResourceMarker::viewportTransform() const
{
SVGMarkerElement* marker = toSVGMarkerElement(node());
ASSERT(marker);
return marker->viewBoxToViewTransform(m_viewport.width(), m_viewport.height());
}
void RenderSVGResourceMarker::calcViewport()
{
if (!selfNeedsLayout())
return;
SVGMarkerElement* marker = toSVGMarkerElement(node());
ASSERT(marker);
SVGLengthContext lengthContext(marker);
float w = marker->markerWidth().value(lengthContext);
float h = marker->markerHeight().value(lengthContext);
m_viewport = FloatRect(0, 0, w, h);
}
}
#endif // ENABLE(SVG)
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