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SVGFEDisplacementMapElement.cpp (5283B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "mozilla/dom/SVGFEDisplacementMapElement.h"
      8 
      9 #include "mozilla/SVGFilterInstance.h"
     10 #include "mozilla/dom/BindContext.h"
     11 #include "mozilla/dom/Document.h"
     12 #include "mozilla/dom/SVGFEDisplacementMapElementBinding.h"
     13 
     14 NS_IMPL_NS_NEW_SVG_ELEMENT(FEDisplacementMap)
     15 
     16 using namespace mozilla::gfx;
     17 
     18 namespace mozilla::dom {
     19 
     20 JSObject* SVGFEDisplacementMapElement::WrapNode(
     21    JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
     22  return SVGFEDisplacementMapElement_Binding::Wrap(aCx, this, aGivenProto);
     23 }
     24 
     25 SVGElement::NumberInfo SVGFEDisplacementMapElement::sNumberInfo[1] = {
     26    {nsGkAtoms::scale, 0},
     27 };
     28 
     29 SVGEnumMapping SVGFEDisplacementMapElement::sChannelMap[] = {
     30    {nsGkAtoms::R, SVG_CHANNEL_R},
     31    {nsGkAtoms::G, SVG_CHANNEL_G},
     32    {nsGkAtoms::B, SVG_CHANNEL_B},
     33    {nsGkAtoms::A, SVG_CHANNEL_A},
     34    {nullptr, 0}};
     35 
     36 SVGElement::EnumInfo SVGFEDisplacementMapElement::sEnumInfo[2] = {
     37    {nsGkAtoms::xChannelSelector, sChannelMap, SVG_CHANNEL_A},
     38    {nsGkAtoms::yChannelSelector, sChannelMap, SVG_CHANNEL_A}};
     39 
     40 SVGElement::StringInfo SVGFEDisplacementMapElement::sStringInfo[3] = {
     41    {nsGkAtoms::result, kNameSpaceID_None, true},
     42    {nsGkAtoms::in, kNameSpaceID_None, true},
     43    {nsGkAtoms::in2, kNameSpaceID_None, true}};
     44 
     45 //----------------------------------------------------------------------
     46 // nsINode methods
     47 
     48 NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEDisplacementMapElement)
     49 
     50 //----------------------------------------------------------------------
     51 
     52 already_AddRefed<DOMSVGAnimatedString> SVGFEDisplacementMapElement::In1() {
     53  return mStringAttributes[IN1].ToDOMAnimatedString(this);
     54 }
     55 
     56 already_AddRefed<DOMSVGAnimatedString> SVGFEDisplacementMapElement::In2() {
     57  return mStringAttributes[IN2].ToDOMAnimatedString(this);
     58 }
     59 
     60 already_AddRefed<DOMSVGAnimatedNumber> SVGFEDisplacementMapElement::Scale() {
     61  return mNumberAttributes[SCALE].ToDOMAnimatedNumber(this);
     62 }
     63 
     64 already_AddRefed<DOMSVGAnimatedEnumeration>
     65 SVGFEDisplacementMapElement::XChannelSelector() {
     66  return mEnumAttributes[CHANNEL_X].ToDOMAnimatedEnum(this);
     67 }
     68 
     69 already_AddRefed<DOMSVGAnimatedEnumeration>
     70 SVGFEDisplacementMapElement::YChannelSelector() {
     71  return mEnumAttributes[CHANNEL_Y].ToDOMAnimatedEnum(this);
     72 }
     73 
     74 FilterPrimitiveDescription SVGFEDisplacementMapElement::GetPrimitiveDescription(
     75    SVGFilterInstance* aInstance, const IntRect& aFilterSubregion,
     76    const nsTArray<bool>& aInputsAreTainted,
     77    nsTArray<RefPtr<SourceSurface>>& aInputImages) {
     78  if (aInputsAreTainted[1]) {
     79    // If the map is tainted, refuse to apply the effect and act as a
     80    // pass-through filter instead, as required by the spec.
     81    OffsetAttributes atts;
     82    atts.mValue = IntPoint(0, 0);
     83    return FilterPrimitiveDescription(AsVariant(std::move(atts)));
     84  }
     85 
     86  float scale = aInstance->GetPrimitiveNumber(SVGContentUtils::XY,
     87                                              &mNumberAttributes[SCALE]);
     88  uint32_t xChannel = mEnumAttributes[CHANNEL_X].GetAnimValue();
     89  uint32_t yChannel = mEnumAttributes[CHANNEL_Y].GetAnimValue();
     90  DisplacementMapAttributes atts;
     91  atts.mScale = scale;
     92  atts.mXChannel = xChannel;
     93  atts.mYChannel = yChannel;
     94  return FilterPrimitiveDescription(AsVariant(std::move(atts)));
     95 }
     96 
     97 bool SVGFEDisplacementMapElement::AttributeAffectsRendering(
     98    int32_t aNameSpaceID, nsAtom* aAttribute) const {
     99  return SVGFEDisplacementMapElementBase::AttributeAffectsRendering(
    100             aNameSpaceID, aAttribute) ||
    101         (aNameSpaceID == kNameSpaceID_None &&
    102          (aAttribute == nsGkAtoms::in || aAttribute == nsGkAtoms::in2 ||
    103           aAttribute == nsGkAtoms::scale ||
    104           aAttribute == nsGkAtoms::xChannelSelector ||
    105           aAttribute == nsGkAtoms::yChannelSelector));
    106 }
    107 
    108 void SVGFEDisplacementMapElement::GetSourceImageNames(
    109    nsTArray<SVGStringInfo>& aSources) {
    110  aSources.AppendElement(SVGStringInfo(&mStringAttributes[IN1], this));
    111  aSources.AppendElement(SVGStringInfo(&mStringAttributes[IN2], this));
    112 }
    113 
    114 nsresult SVGFEDisplacementMapElement::BindToTree(BindContext& aCtx,
    115                                                 nsINode& aParent) {
    116  if (aCtx.InComposedDoc()) {
    117    aCtx.OwnerDoc().SetUseCounter(eUseCounter_custom_feDisplacementMap);
    118  }
    119 
    120  return SVGFEDisplacementMapElementBase::BindToTree(aCtx, aParent);
    121 }
    122 
    123 //----------------------------------------------------------------------
    124 // SVGElement methods
    125 
    126 SVGElement::NumberAttributesInfo SVGFEDisplacementMapElement::GetNumberInfo() {
    127  return NumberAttributesInfo(mNumberAttributes, sNumberInfo,
    128                              std::size(sNumberInfo));
    129 }
    130 
    131 SVGElement::EnumAttributesInfo SVGFEDisplacementMapElement::GetEnumInfo() {
    132  return EnumAttributesInfo(mEnumAttributes, sEnumInfo, std::size(sEnumInfo));
    133 }
    134 
    135 SVGElement::StringAttributesInfo SVGFEDisplacementMapElement::GetStringInfo() {
    136  return StringAttributesInfo(mStringAttributes, sStringInfo,
    137                              std::size(sStringInfo));
    138 }
    139 
    140 }  // namespace mozilla::dom