blob: 1787e18c2dcef5bdf992474cfc022b5166ad5848 [file] [log] [blame]
/*
* 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"
#include "RenderSVGResourceMasker.h"
#include "Element.h"
#include "ElementIterator.h"
#include "FloatPoint.h"
#include "Image.h"
#include "IntRect.h"
#include "SVGRenderingContext.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGResourceMasker);
RenderSVGResourceMasker::RenderSVGResourceMasker(SVGMaskElement& element, RenderStyle&& style)
: RenderSVGResourceContainer(element, WTFMove(style))
{
}
RenderSVGResourceMasker::~RenderSVGResourceMasker() = default;
void RenderSVGResourceMasker::removeAllClientsFromCache(bool markForInvalidation)
{
m_maskContentBoundaries = FloatRect();
m_masker.clear();
markAllClientsForInvalidation(markForInvalidation ? LayoutAndBoundariesInvalidation : ParentOnlyInvalidation);
}
void RenderSVGResourceMasker::removeClientFromCache(RenderElement& client, bool markForInvalidation)
{
m_masker.remove(&client);
markClientForInvalidation(client, markForInvalidation ? BoundariesInvalidation : ParentOnlyInvalidation);
}
bool RenderSVGResourceMasker::applyResource(RenderElement& renderer, const RenderStyle&, GraphicsContext*& context, OptionSet<RenderSVGResourceMode> resourceMode)
{
ASSERT(context);
ASSERT_UNUSED(resourceMode, !resourceMode);
bool missingMaskerData = !m_masker.contains(&renderer);
if (missingMaskerData)
m_masker.set(&renderer, makeUnique<MaskerData>());
MaskerData* maskerData = m_masker.get(&renderer);
AffineTransform absoluteTransform = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(renderer);
FloatRect repaintRect = renderer.repaintRectInLocalCoordinates();
if (!maskerData->maskImage && !repaintRect.isEmpty()) {
const SVGRenderStyle& svgStyle = style().svgStyle();
ColorSpace colorSpace = svgStyle.colorInterpolation() == ColorInterpolation::LinearRGB ? ColorSpace::LinearRGB : ColorSpace::SRGB;
// FIXME (149470): This image buffer should not be unconditionally unaccelerated. Making it match the context breaks alpha masking, though.
maskerData->maskImage = SVGRenderingContext::createImageBuffer(repaintRect, absoluteTransform, colorSpace, Unaccelerated, context);
if (!maskerData->maskImage)
return false;
if (!drawContentIntoMaskImage(maskerData, colorSpace, &renderer))
maskerData->maskImage.reset();
}
if (!maskerData->maskImage)
return false;
SVGRenderingContext::clipToImageBuffer(*context, absoluteTransform, repaintRect, maskerData->maskImage, missingMaskerData);
return true;
}
bool RenderSVGResourceMasker::drawContentIntoMaskImage(MaskerData* maskerData, ColorSpace colorSpace, RenderObject* object)
{
GraphicsContext& maskImageContext = maskerData->maskImage->context();
// Eventually adjust the mask image context according to the target objectBoundingBox.
AffineTransform maskContentTransformation;
if (maskElement().maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
FloatRect objectBoundingBox = object->objectBoundingBox();
maskContentTransformation.translate(objectBoundingBox.location());
maskContentTransformation.scale(objectBoundingBox.size());
maskImageContext.concatCTM(maskContentTransformation);
}
// Draw the content into the ImageBuffer.
for (auto& child : childrenOfType<SVGElement>(maskElement())) {
auto renderer = child.renderer();
if (!renderer)
continue;
if (renderer->needsLayout())
return false;
const RenderStyle& style = renderer->style();
if (style.display() == DisplayType::None || style.visibility() != Visibility::Visible)
continue;
SVGRenderingContext::renderSubtreeToImageBuffer(maskerData->maskImage.get(), *renderer, maskContentTransformation);
}
#if !USE(CG)
maskerData->maskImage->transformColorSpace(ColorSpace::SRGB, colorSpace);
#else
UNUSED_PARAM(colorSpace);
#endif
// Create the luminance mask.
if (style().svgStyle().maskType() == MaskType::Luminance)
maskerData->maskImage->convertToLuminanceMask();
return true;
}
void RenderSVGResourceMasker::calculateMaskContentRepaintRect()
{
for (Node* childNode = maskElement().firstChild(); childNode; childNode = childNode->nextSibling()) {
RenderObject* renderer = childNode->renderer();
if (!childNode->isSVGElement() || !renderer)
continue;
const RenderStyle& style = renderer->style();
if (style.display() == DisplayType::None || style.visibility() != Visibility::Visible)
continue;
m_maskContentBoundaries.unite(renderer->localToParentTransform().mapRect(renderer->repaintRectInLocalCoordinates()));
}
}
FloatRect RenderSVGResourceMasker::resourceBoundingBox(const RenderObject& object)
{
FloatRect objectBoundingBox = object.objectBoundingBox();
FloatRect maskBoundaries = SVGLengthContext::resolveRectangle<SVGMaskElement>(&maskElement(), maskElement().maskUnits(), objectBoundingBox);
// Resource was not layouted yet. Give back clipping rect of the mask.
if (selfNeedsLayout())
return maskBoundaries;
if (m_maskContentBoundaries.isEmpty())
calculateMaskContentRepaintRect();
FloatRect maskRect = m_maskContentBoundaries;
if (maskElement().maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) {
AffineTransform transform;
transform.translate(objectBoundingBox.location());
transform.scale(objectBoundingBox.size());
maskRect = transform.mapRect(maskRect);
}
maskRect.intersect(maskBoundaries);
return maskRect;
}
}