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/*
* Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
* Copyright (C) 2008 Eric Seidel <eric@webkit.org>
* Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
* Copyright (C) Research In Motion Limited 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 "core/layout/svg/LayoutSVGResourceGradient.h"
namespace blink {
LayoutSVGResourceGradient::LayoutSVGResourceGradient(SVGGradientElement* node)
: LayoutSVGResourcePaintServer(node)
, m_shouldCollectGradientAttributes(true)
{
}
void LayoutSVGResourceGradient::removeAllClientsFromCache(bool markForInvalidation)
{
m_gradientMap.clear();
m_shouldCollectGradientAttributes = true;
markAllClientsForInvalidation(markForInvalidation ? PaintInvalidation : ParentOnlyInvalidation);
}
void LayoutSVGResourceGradient::removeClientFromCache(LayoutObject* client, bool markForInvalidation)
{
ASSERT(client);
m_gradientMap.remove(client);
markClientForInvalidation(client, markForInvalidation ? PaintInvalidation : ParentOnlyInvalidation);
}
SVGPaintServer LayoutSVGResourceGradient::preparePaintServer(const LayoutObject& object)
{
clearInvalidationMask();
// Be sure to synchronize all SVG properties on the gradientElement _before_ processing any further.
// Otherwhise the call to collectGradientAttributes() in createTileImage(), may cause the SVG DOM property
// synchronization to kick in, which causes removeAllClientsFromCache() to be called, which in turn deletes our
// GradientData object! Leaving out the line below will cause svg/dynamic-updates/SVG*GradientElement-svgdom* to crash.
SVGGradientElement* gradientElement = toSVGGradientElement(element());
if (!gradientElement)
return SVGPaintServer::invalid();
if (m_shouldCollectGradientAttributes) {
gradientElement->synchronizeAnimatedSVGAttribute(anyQName());
if (!collectGradientAttributes(gradientElement))
return SVGPaintServer::invalid();
m_shouldCollectGradientAttributes = false;
}
// Spec: When the geometry of the applicable element has no width or height and objectBoundingBox is specified,
// then the given effect (e.g. a gradient or a filter) will be ignored.
FloatRect objectBoundingBox = object.objectBoundingBox();
if (gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && objectBoundingBox.isEmpty())
return SVGPaintServer::invalid();
OwnPtr<GradientData>& gradientData = m_gradientMap.add(&object, nullptr).storedValue->value;
if (!gradientData)
gradientData = adoptPtr(new GradientData);
// Create gradient object
if (!gradientData->gradient) {
buildGradient(gradientData.get());
// We want the text bounding box applied to the gradient space transform now, so the gradient shader can use it.
if (gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && !objectBoundingBox.isEmpty()) {
gradientData->userspaceTransform.translate(objectBoundingBox.x(), objectBoundingBox.y());
gradientData->userspaceTransform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
}
AffineTransform gradientTransform;
calculateGradientTransform(gradientTransform);
gradientData->userspaceTransform *= gradientTransform;
}
if (!gradientData->gradient)
return SVGPaintServer::invalid();
gradientData->gradient->setGradientSpaceTransform(gradientData->userspaceTransform);
return SVGPaintServer(gradientData->gradient);
}
bool LayoutSVGResourceGradient::isChildAllowed(LayoutObject* child, const ComputedStyle&) const
{
if (child->isSVGGradientStop())
return true;
if (!child->isSVGResourceContainer())
return false;
return toLayoutSVGResourceContainer(child)->isSVGPaintServer();
}
void LayoutSVGResourceGradient::addStops(GradientData* gradientData, const Vector<Gradient::ColorStop>& stops) const
{
ASSERT(gradientData->gradient);
for (const auto& stop : stops)
gradientData->gradient->addColorStop(stop);
}
GradientSpreadMethod LayoutSVGResourceGradient::platformSpreadMethodFromSVGType(SVGSpreadMethodType method) const
{
switch (method) {
case SVGSpreadMethodUnknown:
case SVGSpreadMethodPad:
return SpreadMethodPad;
case SVGSpreadMethodReflect:
return SpreadMethodReflect;
case SVGSpreadMethodRepeat:
return SpreadMethodRepeat;
}
ASSERT_NOT_REACHED();
return SpreadMethodPad;
}
} // namespace blink
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