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/*
* Copyright (C) Research In Motion Limited 2011. 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/svg/svg_fe_drop_shadow_element.h"
#include "third_party/blink/renderer/core/dom/node_computed_style.h"
#include "third_party/blink/renderer/core/style/computed_style.h"
#include "third_party/blink/renderer/core/style/svg_computed_style.h"
#include "third_party/blink/renderer/core/svg/graphics/filters/svg_filter_builder.h"
#include "third_party/blink/renderer/core/svg_names.h"
#include "third_party/blink/renderer/platform/graphics/filters/fe_drop_shadow.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
namespace blink {
SVGFEDropShadowElement::SVGFEDropShadowElement(Document& document)
: SVGFilterPrimitiveStandardAttributes(svg_names::kFEDropShadowTag,
document),
dx_(MakeGarbageCollected<SVGAnimatedNumber>(this, svg_names::kDxAttr, 2)),
dy_(MakeGarbageCollected<SVGAnimatedNumber>(this, svg_names::kDyAttr, 2)),
std_deviation_(MakeGarbageCollected<SVGAnimatedNumberOptionalNumber>(
this,
svg_names::kStdDeviationAttr,
2)),
in1_(MakeGarbageCollected<SVGAnimatedString>(this, svg_names::kInAttr)) {
AddToPropertyMap(dx_);
AddToPropertyMap(dy_);
AddToPropertyMap(std_deviation_);
AddToPropertyMap(in1_);
}
void SVGFEDropShadowElement::Trace(Visitor* visitor) {
visitor->Trace(dx_);
visitor->Trace(dy_);
visitor->Trace(std_deviation_);
visitor->Trace(in1_);
SVGFilterPrimitiveStandardAttributes::Trace(visitor);
}
void SVGFEDropShadowElement::setStdDeviation(float x, float y) {
stdDeviationX()->BaseValue()->SetValue(x);
stdDeviationY()->BaseValue()->SetValue(y);
Invalidate();
}
bool SVGFEDropShadowElement::SetFilterEffectAttribute(
FilterEffect* effect,
const QualifiedName& attr_name) {
const ComputedStyle& style = ComputedStyleRef();
FEDropShadow* drop_shadow = static_cast<FEDropShadow*>(effect);
if (attr_name == svg_names::kFloodColorAttr) {
drop_shadow->SetShadowColor(
style.VisitedDependentColor(GetCSSPropertyFloodColor()));
return true;
}
if (attr_name == svg_names::kFloodOpacityAttr) {
drop_shadow->SetShadowOpacity(style.SvgStyle().FloodOpacity());
return true;
}
return SVGFilterPrimitiveStandardAttributes::SetFilterEffectAttribute(
effect, attr_name);
}
void SVGFEDropShadowElement::SvgAttributeChanged(
const QualifiedName& attr_name) {
if (attr_name == svg_names::kInAttr ||
attr_name == svg_names::kStdDeviationAttr ||
attr_name == svg_names::kDxAttr || attr_name == svg_names::kDyAttr) {
SVGElement::InvalidationGuard invalidation_guard(this);
Invalidate();
return;
}
SVGFilterPrimitiveStandardAttributes::SvgAttributeChanged(attr_name);
}
FilterEffect* SVGFEDropShadowElement::Build(SVGFilterBuilder* filter_builder,
Filter* filter) {
const ComputedStyle* style = GetComputedStyle();
if (!style)
return nullptr;
Color color = style->VisitedDependentColor(GetCSSPropertyFloodColor());
float opacity = style->SvgStyle().FloodOpacity();
FilterEffect* input1 = filter_builder->GetEffectById(
AtomicString(in1_->CurrentValue()->Value()));
DCHECK(input1);
// Clamp std.dev. to non-negative. (See SVGFEGaussianBlurElement::build)
float std_dev_x = std::max(0.0f, stdDeviationX()->CurrentValue()->Value());
float std_dev_y = std::max(0.0f, stdDeviationY()->CurrentValue()->Value());
auto* effect = MakeGarbageCollected<FEDropShadow>(
filter, std_dev_x, std_dev_y, dx_->CurrentValue()->Value(),
dy_->CurrentValue()->Value(), color, opacity);
effect->InputEffects().push_back(input1);
return effect;
}
bool SVGFEDropShadowElement::TaintsOrigin() const {
const ComputedStyle* style = GetComputedStyle();
// TaintsOrigin() is only called after a successful call to Build()
// (see above), so we should have a ComputedStyle here.
DCHECK(style);
return style->SvgStyle().FloodColor().IsCurrentColor();
}
} // namespace blink
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