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/*
* 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 "core/layout/svg/LayoutSVGResourceMasker.h"
#include "core/dom/ElementTraversal.h"
#include "core/layout/svg/SVGLayoutSupport.h"
#include "core/paint/SVGPaintContext.h"
#include "core/svg/SVGElement.h"
#include "platform/graphics/paint/SkPictureBuilder.h"
#include "platform/transforms/AffineTransform.h"
#include "third_party/skia/include/core/SkPicture.h"
namespace blink {
LayoutSVGResourceMasker::LayoutSVGResourceMasker(SVGMaskElement* node)
: LayoutSVGResourceContainer(node) {}
LayoutSVGResourceMasker::~LayoutSVGResourceMasker() {}
void LayoutSVGResourceMasker::removeAllClientsFromCache(
bool markForInvalidation) {
m_maskContentPicture.reset();
m_maskContentBoundaries = FloatRect();
markAllClientsForInvalidation(markForInvalidation
? LayoutAndBoundariesInvalidation
: ParentOnlyInvalidation);
}
void LayoutSVGResourceMasker::removeClientFromCache(LayoutObject* client,
bool markForInvalidation) {
ASSERT(client);
markClientForInvalidation(client, markForInvalidation
? BoundariesInvalidation
: ParentOnlyInvalidation);
}
sk_sp<const SkPicture> LayoutSVGResourceMasker::createContentPicture(
AffineTransform& contentTransformation,
const FloatRect& targetBoundingBox,
GraphicsContext& context) {
SVGUnitTypes::SVGUnitType contentUnits = toSVGMaskElement(element())
->maskContentUnits()
->currentValue()
->enumValue();
if (contentUnits == SVGUnitTypes::kSvgUnitTypeObjectboundingbox) {
contentTransformation.translate(targetBoundingBox.x(),
targetBoundingBox.y());
contentTransformation.scaleNonUniform(targetBoundingBox.width(),
targetBoundingBox.height());
}
if (m_maskContentPicture)
return m_maskContentPicture;
SubtreeContentTransformScope contentTransformScope(contentTransformation);
// Using strokeBoundingBox instead of visualRectInLocalCoordinates
// to avoid the intersection with local clips/mask, which may yield incorrect
// results when mixing objectBoundingBox and userSpaceOnUse units.
// http://crbug.com/294900
FloatRect bounds = strokeBoundingBox();
SkPictureBuilder pictureBuilder(bounds, nullptr, &context);
ColorFilter maskContentFilter =
style()->svgStyle().colorInterpolation() == CI_LINEARRGB
? ColorFilterSRGBToLinearRGB
: ColorFilterNone;
pictureBuilder.context().setColorFilter(maskContentFilter);
for (const SVGElement& childElement :
Traversal<SVGElement>::childrenOf(*element())) {
const LayoutObject* layoutObject = childElement.layoutObject();
if (!layoutObject || layoutObject->styleRef().display() == EDisplay::None)
continue;
SVGPaintContext::paintSubtree(pictureBuilder.context(), layoutObject);
}
m_maskContentPicture = pictureBuilder.endRecording();
return m_maskContentPicture;
}
void LayoutSVGResourceMasker::calculateMaskContentVisualRect() {
for (const SVGElement& childElement :
Traversal<SVGElement>::childrenOf(*element())) {
const LayoutObject* layoutObject = childElement.layoutObject();
if (!layoutObject || layoutObject->styleRef().display() == EDisplay::None)
continue;
m_maskContentBoundaries.unite(
layoutObject->localToSVGParentTransform().mapRect(
layoutObject->visualRectInLocalSVGCoordinates()));
}
}
FloatRect LayoutSVGResourceMasker::resourceBoundingBox(
const LayoutObject* object) {
SVGMaskElement* maskElement = toSVGMaskElement(element());
ASSERT(maskElement);
FloatRect objectBoundingBox = object->objectBoundingBox();
FloatRect maskBoundaries = SVGLengthContext::resolveRectangle<SVGMaskElement>(
maskElement, maskElement->maskUnits()->currentValue()->enumValue(),
objectBoundingBox);
// Resource was not layouted yet. Give back clipping rect of the mask.
if (selfNeedsLayout())
return maskBoundaries;
if (m_maskContentBoundaries.isEmpty())
calculateMaskContentVisualRect();
FloatRect maskRect = m_maskContentBoundaries;
if (maskElement->maskContentUnits()->currentValue()->value() ==
SVGUnitTypes::kSvgUnitTypeObjectboundingbox) {
AffineTransform transform;
transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
transform.scaleNonUniform(objectBoundingBox.width(),
objectBoundingBox.height());
maskRect = transform.mapRect(maskRect);
}
maskRect.intersect(maskBoundaries);
return maskRect;
}
} // namespace blink
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