gecko-dev/dom/svg/SVGFEDropShadowElement.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "mozilla/dom/SVGFEDropShadowElement.h"
#include "mozilla/dom/SVGFEDropShadowElementBinding.h"
#include "nsIFrame.h"
#include "nsSVGFilterInstance.h"

NS_IMPL_NS_NEW_SVG_ELEMENT(FEDropShadow)

using namespace mozilla::gfx;

namespace mozilla {
namespace dom {

JSObject* SVGFEDropShadowElement::WrapNode(JSContext* aCx,
                                           JS::Handle<JSObject*> aGivenProto) {
  return SVGFEDropShadowElement_Binding::Wrap(aCx, this, aGivenProto);
}

SVGElement::NumberInfo SVGFEDropShadowElement::sNumberInfo[2] = {
    {nsGkAtoms::dx, 2, false}, {nsGkAtoms::dy, 2, false}};

SVGElement::NumberPairInfo SVGFEDropShadowElement::sNumberPairInfo[1] = {
    {nsGkAtoms::stdDeviation, 2, 2}};

SVGElement::StringInfo SVGFEDropShadowElement::sStringInfo[2] = {
    {nsGkAtoms::result, kNameSpaceID_None, true},
    {nsGkAtoms::in, kNameSpaceID_None, true}};

//----------------------------------------------------------------------
// nsINode methods

NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEDropShadowElement)

//----------------------------------------------------------------------

already_AddRefed<SVGAnimatedString> SVGFEDropShadowElement::In1() {
  return mStringAttributes[IN1].ToDOMAnimatedString(this);
}

already_AddRefed<SVGAnimatedNumber> SVGFEDropShadowElement::Dx() {
  return mNumberAttributes[DX].ToDOMAnimatedNumber(this);
}

already_AddRefed<SVGAnimatedNumber> SVGFEDropShadowElement::Dy() {
  return mNumberAttributes[DY].ToDOMAnimatedNumber(this);
}

already_AddRefed<SVGAnimatedNumber> SVGFEDropShadowElement::StdDeviationX() {
  return mNumberPairAttributes[STD_DEV].ToDOMAnimatedNumber(
      SVGNumberPair::eFirst, this);
}

already_AddRefed<SVGAnimatedNumber> SVGFEDropShadowElement::StdDeviationY() {
  return mNumberPairAttributes[STD_DEV].ToDOMAnimatedNumber(
      SVGNumberPair::eSecond, this);
}

void SVGFEDropShadowElement::SetStdDeviation(float stdDeviationX,
                                             float stdDeviationY) {
  mNumberPairAttributes[STD_DEV].SetBaseValues(stdDeviationX, stdDeviationY,
                                               this);
}

FilterPrimitiveDescription SVGFEDropShadowElement::GetPrimitiveDescription(
    nsSVGFilterInstance* aInstance, const IntRect& aFilterSubregion,
    const nsTArray<bool>& aInputsAreTainted,
    nsTArray<RefPtr<SourceSurface>>& aInputImages) {
  float stdX = aInstance->GetPrimitiveNumber(SVGContentUtils::X,
                                             &mNumberPairAttributes[STD_DEV],
                                             SVGNumberPair::eFirst);
  float stdY = aInstance->GetPrimitiveNumber(SVGContentUtils::Y,
                                             &mNumberPairAttributes[STD_DEV],
                                             SVGNumberPair::eSecond);
  if (stdX < 0 || stdY < 0) {
    return FilterPrimitiveDescription();
  }

  IntPoint offset(int32_t(aInstance->GetPrimitiveNumber(
                      SVGContentUtils::X, &mNumberAttributes[DX])),
                  int32_t(aInstance->GetPrimitiveNumber(
                      SVGContentUtils::Y, &mNumberAttributes[DY])));

  DropShadowAttributes atts;
  atts.mStdDeviation = Size(stdX, stdY);
  atts.mOffset = offset;

  nsIFrame* frame = GetPrimaryFrame();
  if (frame) {
    const nsStyleSVGReset* styleSVGReset = frame->Style()->StyleSVGReset();
    Color color(Color::FromABGR(styleSVGReset->mFloodColor.CalcColor(frame)));
    color.a *= styleSVGReset->mFloodOpacity;
    atts.mColor = color;
  } else {
    atts.mColor = Color();
  }
  return FilterPrimitiveDescription(AsVariant(std::move(atts)));
}

bool SVGFEDropShadowElement::AttributeAffectsRendering(
    int32_t aNameSpaceID, nsAtom* aAttribute) const {
  return SVGFEDropShadowElementBase::AttributeAffectsRendering(aNameSpaceID,
                                                               aAttribute) ||
         (aNameSpaceID == kNameSpaceID_None &&
          (aAttribute == nsGkAtoms::in ||
           aAttribute == nsGkAtoms::stdDeviation ||
           aAttribute == nsGkAtoms::dx || aAttribute == nsGkAtoms::dy));
}

void SVGFEDropShadowElement::GetSourceImageNames(
    nsTArray<SVGStringInfo>& aSources) {
  aSources.AppendElement(SVGStringInfo(&mStringAttributes[IN1], this));
}

//----------------------------------------------------------------------
// nsIContent methods

NS_IMETHODIMP_(bool)
SVGFEDropShadowElement::IsAttributeMapped(const nsAtom* name) const {
  static const MappedAttributeEntry* const map[] = {sFEFloodMap};

  return FindAttributeDependence(name, map) ||
         SVGFEDropShadowElementBase::IsAttributeMapped(name);
}

//----------------------------------------------------------------------
// SVGElement methods

SVGElement::NumberAttributesInfo SVGFEDropShadowElement::GetNumberInfo() {
  return NumberAttributesInfo(mNumberAttributes, sNumberInfo,
                              ArrayLength(sNumberInfo));
}

SVGElement::NumberPairAttributesInfo
SVGFEDropShadowElement::GetNumberPairInfo() {
  return NumberPairAttributesInfo(mNumberPairAttributes, sNumberPairInfo,
                                  ArrayLength(sNumberPairInfo));
}

SVGElement::StringAttributesInfo SVGFEDropShadowElement::GetStringInfo() {
  return StringAttributesInfo(mStringAttributes, sStringInfo,
                              ArrayLength(sStringInfo));
}

}  // namespace dom
}  // namespace mozilla