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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 "third_party/blink/renderer/core/layout/svg/layout_svg_resource_gradient.h"
#include <memory>
#include "third_party/blink/renderer/platform/graphics/gradient.h"
namespace blink {
struct GradientData {
USING_FAST_MALLOC(GradientData);
public:
scoped_refptr<Gradient> gradient;
AffineTransform userspace_transform;
};
LayoutSVGResourceGradient::LayoutSVGResourceGradient(SVGGradientElement* node)
: LayoutSVGResourcePaintServer(node),
should_collect_gradient_attributes_(true),
gradient_map_(MakeGarbageCollected<GradientMap>()) {}
void LayoutSVGResourceGradient::RemoveAllClientsFromCache() {
gradient_map_->clear();
should_collect_gradient_attributes_ = true;
To<SVGGradientElement>(*GetElement()).InvalidateDependentGradients();
MarkAllClientsForInvalidation(SVGResourceClient::kPaintInvalidation);
}
bool LayoutSVGResourceGradient::RemoveClientFromCache(
SVGResourceClient& client) {
auto entry = gradient_map_->find(&client);
if (entry == gradient_map_->end())
return false;
gradient_map_->erase(entry);
return true;
}
std::unique_ptr<GradientData> LayoutSVGResourceGradient::BuildGradientData(
const FloatRect& object_bounding_box) {
// Create gradient object
auto gradient_data = std::make_unique<GradientData>();
// Validate gradient DOM state before building the actual
// gradient. This should avoid tearing down the gradient we're
// currently working on. Preferably the state validation should have
// no side-effects though.
if (should_collect_gradient_attributes_) {
CollectGradientAttributes();
should_collect_gradient_attributes_ = false;
}
// We want the text bounding box applied to the gradient space transform
// now, so the gradient shader can use it.
if (GradientUnits() == SVGUnitTypes::kSvgUnitTypeObjectboundingbox) {
// 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.
if (object_bounding_box.IsEmpty())
return gradient_data;
gradient_data->userspace_transform.Translate(object_bounding_box.X(),
object_bounding_box.Y());
gradient_data->userspace_transform.ScaleNonUniform(
object_bounding_box.Width(), object_bounding_box.Height());
}
// Create gradient object
gradient_data->gradient = BuildGradient();
AffineTransform gradient_transform = CalculateGradientTransform();
gradient_data->userspace_transform *= gradient_transform;
return gradient_data;
}
SVGPaintServer LayoutSVGResourceGradient::PreparePaintServer(
const SVGResourceClient& client,
const FloatRect& object_bounding_box) {
ClearInvalidationMask();
std::unique_ptr<GradientData>& gradient_data =
gradient_map_->insert(&client, nullptr).stored_value->value;
if (!gradient_data)
gradient_data = BuildGradientData(object_bounding_box);
if (!gradient_data->gradient)
return SVGPaintServer::Invalid();
return SVGPaintServer(gradient_data->gradient,
gradient_data->userspace_transform);
}
bool LayoutSVGResourceGradient::IsChildAllowed(LayoutObject* child,
const ComputedStyle&) const {
if (!child->IsSVGResourceContainer())
return false;
return ToLayoutSVGResourceContainer(child)->IsSVGPaintServer();
}
GradientSpreadMethod LayoutSVGResourceGradient::PlatformSpreadMethodFromSVGType(
SVGSpreadMethodType method) {
switch (method) {
case kSVGSpreadMethodUnknown:
case kSVGSpreadMethodPad:
return kSpreadMethodPad;
case kSVGSpreadMethodReflect:
return kSpreadMethodReflect;
case kSVGSpreadMethodRepeat:
return kSpreadMethodRepeat;
}
NOTREACHED();
return kSpreadMethodPad;
}
} // namespace blink
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