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gecko-dev/dom/svg/SVGFilters.cpp

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/* -*- 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 "SVGFilters.h"
#include <algorithm>
#include "DOMSVGAnimatedNumberList.h"
#include "DOMSVGAnimatedLength.h"
#include "nsGkAtoms.h"
#include "nsCOMPtr.h"
#include "nsIFrame.h"
#include "nsLayoutUtils.h"
#include "SVGAnimatedEnumeration.h"
#include "SVGAnimatedNumberPair.h"
#include "SVGAnimatedString.h"
#include "SVGNumberList.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/SVGContentUtils.h"
#include "mozilla/SVGFilterInstance.h"
#include "mozilla/dom/SVGComponentTransferFunctionElement.h"
#include "mozilla/dom/SVGElement.h"
#include "mozilla/dom/SVGFEDistantLightElement.h"
#include "mozilla/dom/SVGFEFuncAElementBinding.h"
#include "mozilla/dom/SVGFEFuncBElementBinding.h"
#include "mozilla/dom/SVGFEFuncGElementBinding.h"
#include "mozilla/dom/SVGFEFuncRElementBinding.h"
#include "mozilla/dom/SVGFEPointLightElement.h"
#include "mozilla/dom/SVGFESpotLightElement.h"
#include "mozilla/dom/SVGFilterElement.h"
#include "mozilla/dom/SVGLengthBinding.h"
#if defined(XP_WIN)
// Prevent Windows redefining LoadImage
# undef LoadImage
#endif
using namespace mozilla::gfx;
namespace mozilla {
namespace dom {
//--------------------Filter Element Base Class-----------------------
SVGElement::LengthInfo SVGFE::sLengthInfo[4] = {
{nsGkAtoms::x, 0, SVGLength_Binding::SVG_LENGTHTYPE_PERCENTAGE,
SVGContentUtils::X},
{nsGkAtoms::y, 0, SVGLength_Binding::SVG_LENGTHTYPE_PERCENTAGE,
SVGContentUtils::Y},
{nsGkAtoms::width, 100, SVGLength_Binding::SVG_LENGTHTYPE_PERCENTAGE,
SVGContentUtils::X},
{nsGkAtoms::height, 100, SVGLength_Binding::SVG_LENGTHTYPE_PERCENTAGE,
SVGContentUtils::Y}};
//----------------------------------------------------------------------
// nsISupports methods
NS_IMPL_ADDREF_INHERITED(SVGFE, SVGFEBase)
NS_IMPL_RELEASE_INHERITED(SVGFE, SVGFEBase)
NS_INTERFACE_MAP_BEGIN(SVGFE)
NS_INTERFACE_MAP_ENTRY_CONCRETE(SVGFE)
NS_INTERFACE_MAP_END_INHERITING(SVGFEBase)
//----------------------------------------------------------------------
// Implementation
void SVGFE::GetSourceImageNames(nsTArray<SVGStringInfo>& aSources) {}
bool SVGFE::OutputIsTainted(const nsTArray<bool>& aInputsAreTainted,
nsIPrincipal* aReferencePrincipal) {
// This is the default implementation for OutputIsTainted.
// Our output is tainted if we have at least one tainted input.
for (uint32_t i = 0; i < aInputsAreTainted.Length(); i++) {
if (aInputsAreTainted[i]) {
return true;
}
}
return false;
}
bool SVGFE::AttributeAffectsRendering(int32_t aNameSpaceID,
nsAtom* aAttribute) const {
return aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::x || aAttribute == nsGkAtoms::y ||
aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height ||
aAttribute == nsGkAtoms::result);
}
already_AddRefed<DOMSVGAnimatedLength> SVGFE::X() {
return mLengthAttributes[ATTR_X].ToDOMAnimatedLength(this);
}
already_AddRefed<DOMSVGAnimatedLength> SVGFE::Y() {
return mLengthAttributes[ATTR_Y].ToDOMAnimatedLength(this);
}
already_AddRefed<DOMSVGAnimatedLength> SVGFE::Width() {
return mLengthAttributes[ATTR_WIDTH].ToDOMAnimatedLength(this);
}
already_AddRefed<DOMSVGAnimatedLength> SVGFE::Height() {
return mLengthAttributes[ATTR_HEIGHT].ToDOMAnimatedLength(this);
}
already_AddRefed<DOMSVGAnimatedString> SVGFE::Result() {
return GetResultImageName().ToDOMAnimatedString(this);
}
//----------------------------------------------------------------------
// nsIContent methods
NS_IMETHODIMP_(bool)
SVGFE::IsAttributeMapped(const nsAtom* name) const {
static const MappedAttributeEntry* const map[] = {sFiltersMap};
return FindAttributeDependence(name, map) ||
SVGFEBase::IsAttributeMapped(name);
}
//----------------------------------------------------------------------
// SVGElement methods
bool SVGFE::StyleIsSetToSRGB() {
nsIFrame* frame = GetPrimaryFrame();
if (!frame) return false;
ComputedStyle* style = frame->Style();
return style->StyleSVG()->mColorInterpolationFilters ==
StyleColorInterpolation::Srgb;
}
/* virtual */
bool SVGFE::HasValidDimensions() const {
return (!mLengthAttributes[ATTR_WIDTH].IsExplicitlySet() ||
mLengthAttributes[ATTR_WIDTH].GetAnimValInSpecifiedUnits() > 0) &&
(!mLengthAttributes[ATTR_HEIGHT].IsExplicitlySet() ||
mLengthAttributes[ATTR_HEIGHT].GetAnimValInSpecifiedUnits() > 0);
}
Size SVGFE::GetKernelUnitLength(SVGFilterInstance* aInstance,
SVGAnimatedNumberPair* aKernelUnitLength) {
if (!aKernelUnitLength->IsExplicitlySet()) {
return Size(1, 1);
}
float kernelX = aInstance->GetPrimitiveNumber(
SVGContentUtils::X, aKernelUnitLength, SVGAnimatedNumberPair::eFirst);
float kernelY = aInstance->GetPrimitiveNumber(
SVGContentUtils::Y, aKernelUnitLength, SVGAnimatedNumberPair::eSecond);
return Size(kernelX, kernelY);
}
SVGElement::LengthAttributesInfo SVGFE::GetLengthInfo() {
return LengthAttributesInfo(mLengthAttributes, sLengthInfo,
ArrayLength(sLengthInfo));
}
SVGElement::NumberListInfo
SVGComponentTransferFunctionElement::sNumberListInfo[1] = {
{nsGkAtoms::tableValues}};
SVGElement::NumberInfo SVGComponentTransferFunctionElement::sNumberInfo[5] = {
{nsGkAtoms::slope, 1, false},
{nsGkAtoms::intercept, 0, false},
{nsGkAtoms::amplitude, 1, false},
{nsGkAtoms::exponent, 1, false},
{nsGkAtoms::offset, 0, false}};
SVGEnumMapping SVGComponentTransferFunctionElement::sTypeMap[] = {
{nsGkAtoms::identity, SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY},
{nsGkAtoms::table, SVG_FECOMPONENTTRANSFER_TYPE_TABLE},
{nsGkAtoms::discrete, SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE},
{nsGkAtoms::linear, SVG_FECOMPONENTTRANSFER_TYPE_LINEAR},
{nsGkAtoms::gamma, SVG_FECOMPONENTTRANSFER_TYPE_GAMMA},
{nullptr, 0}};
SVGElement::EnumInfo SVGComponentTransferFunctionElement::sEnumInfo[1] = {
{nsGkAtoms::type, sTypeMap, SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY}};
//----------------------------------------------------------------------
// nsISupports methods
NS_IMPL_ADDREF_INHERITED(SVGComponentTransferFunctionElement,
SVGComponentTransferFunctionElementBase)
NS_IMPL_RELEASE_INHERITED(SVGComponentTransferFunctionElement,
SVGComponentTransferFunctionElementBase)
NS_INTERFACE_MAP_BEGIN(SVGComponentTransferFunctionElement)
NS_INTERFACE_MAP_ENTRY_CONCRETE(SVGComponentTransferFunctionElement)
NS_INTERFACE_MAP_END_INHERITING(SVGComponentTransferFunctionElementBase)
//----------------------------------------------------------------------
// nsFEUnstyledElement methods
bool SVGComponentTransferFunctionElement::AttributeAffectsRendering(
int32_t aNameSpaceID, nsAtom* aAttribute) const {
return aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::tableValues ||
aAttribute == nsGkAtoms::slope ||
aAttribute == nsGkAtoms::intercept ||
aAttribute == nsGkAtoms::amplitude ||
aAttribute == nsGkAtoms::exponent ||
aAttribute == nsGkAtoms::offset || aAttribute == nsGkAtoms::type);
}
//----------------------------------------------------------------------
already_AddRefed<DOMSVGAnimatedEnumeration>
SVGComponentTransferFunctionElement::Type() {
return mEnumAttributes[TYPE].ToDOMAnimatedEnum(this);
}
already_AddRefed<DOMSVGAnimatedNumberList>
SVGComponentTransferFunctionElement::TableValues() {
return DOMSVGAnimatedNumberList::GetDOMWrapper(
&mNumberListAttributes[TABLEVALUES], this, TABLEVALUES);
}
already_AddRefed<DOMSVGAnimatedNumber>
SVGComponentTransferFunctionElement::Slope() {
return mNumberAttributes[SLOPE].ToDOMAnimatedNumber(this);
}
already_AddRefed<DOMSVGAnimatedNumber>
SVGComponentTransferFunctionElement::Intercept() {
return mNumberAttributes[INTERCEPT].ToDOMAnimatedNumber(this);
}
already_AddRefed<DOMSVGAnimatedNumber>
SVGComponentTransferFunctionElement::Amplitude() {
return mNumberAttributes[AMPLITUDE].ToDOMAnimatedNumber(this);
}
already_AddRefed<DOMSVGAnimatedNumber>
SVGComponentTransferFunctionElement::Exponent() {
return mNumberAttributes[EXPONENT].ToDOMAnimatedNumber(this);
}
already_AddRefed<DOMSVGAnimatedNumber>
SVGComponentTransferFunctionElement::Offset() {
return mNumberAttributes[OFFSET].ToDOMAnimatedNumber(this);
}
void SVGComponentTransferFunctionElement::ComputeAttributes(
int32_t aChannel, ComponentTransferAttributes& aAttributes) {
uint32_t type = mEnumAttributes[TYPE].GetAnimValue();
float slope, intercept, amplitude, exponent, offset;
GetAnimatedNumberValues(&slope, &intercept, &amplitude, &exponent, &offset,
nullptr);
const SVGNumberList& tableValues =
mNumberListAttributes[TABLEVALUES].GetAnimValue();
aAttributes.mTypes[aChannel] = (uint8_t)type;
switch (type) {
case SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: {
aAttributes.mValues[aChannel].SetLength(2);
aAttributes.mValues[aChannel][kComponentTransferSlopeIndex] = slope;
aAttributes.mValues[aChannel][kComponentTransferInterceptIndex] =
intercept;
break;
}
case SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: {
aAttributes.mValues[aChannel].SetLength(3);
aAttributes.mValues[aChannel][kComponentTransferAmplitudeIndex] =
amplitude;
aAttributes.mValues[aChannel][kComponentTransferExponentIndex] = exponent;
aAttributes.mValues[aChannel][kComponentTransferOffsetIndex] = offset;
break;
}
case SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE:
case SVG_FECOMPONENTTRANSFER_TYPE_TABLE: {
if (!tableValues.IsEmpty()) {
aAttributes.mValues[aChannel].AppendElements(&tableValues[0],
tableValues.Length());
}
break;
}
}
}
//----------------------------------------------------------------------
// SVGElement methods
SVGElement::NumberListAttributesInfo
SVGComponentTransferFunctionElement::GetNumberListInfo() {
return NumberListAttributesInfo(mNumberListAttributes, sNumberListInfo,
ArrayLength(sNumberListInfo));
}
SVGElement::EnumAttributesInfo
SVGComponentTransferFunctionElement::GetEnumInfo() {
return EnumAttributesInfo(mEnumAttributes, sEnumInfo, ArrayLength(sEnumInfo));
}
SVGElement::NumberAttributesInfo
SVGComponentTransferFunctionElement::GetNumberInfo() {
return NumberAttributesInfo(mNumberAttributes, sNumberInfo,
ArrayLength(sNumberInfo));
}
/* virtual */
JSObject* SVGFEFuncRElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGFEFuncRElement_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
NS_IMPL_NS_NEW_SVG_ELEMENT(FEFuncR)
namespace mozilla {
namespace dom {
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEFuncRElement)
/* virtual */
JSObject* SVGFEFuncGElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGFEFuncGElement_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
NS_IMPL_NS_NEW_SVG_ELEMENT(FEFuncG)
namespace mozilla {
namespace dom {
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEFuncGElement)
/* virtual */
JSObject* SVGFEFuncBElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGFEFuncBElement_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
NS_IMPL_NS_NEW_SVG_ELEMENT(FEFuncB)
namespace mozilla {
namespace dom {
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEFuncBElement)
/* virtual */
JSObject* SVGFEFuncAElement::WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return SVGFEFuncAElement_Binding::Wrap(aCx, this, aGivenProto);
}
} // namespace dom
} // namespace mozilla
NS_IMPL_NS_NEW_SVG_ELEMENT(FEFuncA)
namespace mozilla {
namespace dom {
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFEFuncAElement)
//--------------------------------------------------------------------
//
SVGElement::NumberInfo SVGFELightingElement::sNumberInfo[4] = {
{nsGkAtoms::surfaceScale, 1, false},
{nsGkAtoms::diffuseConstant, 1, false},
{nsGkAtoms::specularConstant, 1, false},
{nsGkAtoms::specularExponent, 1, false}};
SVGElement::NumberPairInfo SVGFELightingElement::sNumberPairInfo[1] = {
{nsGkAtoms::kernelUnitLength, 0, 0}};
SVGElement::StringInfo SVGFELightingElement::sStringInfo[2] = {
{nsGkAtoms::result, kNameSpaceID_None, true},
{nsGkAtoms::in, kNameSpaceID_None, true}};
//----------------------------------------------------------------------
// Implementation
NS_IMETHODIMP_(bool)
SVGFELightingElement::IsAttributeMapped(const nsAtom* name) const {
static const MappedAttributeEntry* const map[] = {sColorMap,
sLightingEffectsMap};
return FindAttributeDependence(name, map) ||
SVGFELightingElementBase::IsAttributeMapped(name);
}
void SVGFELightingElement::GetSourceImageNames(
nsTArray<SVGStringInfo>& aSources) {
aSources.AppendElement(SVGStringInfo(&mStringAttributes[IN1], this));
}
LightType SVGFELightingElement::ComputeLightAttributes(
SVGFilterInstance* aInstance, nsTArray<float>& aFloatAttributes) {
// find specified light
for (nsCOMPtr<nsIContent> child = nsINode::GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsAnyOfSVGElements(nsGkAtoms::feDistantLight,
nsGkAtoms::fePointLight,
nsGkAtoms::feSpotLight)) {
return static_cast<SVGFELightElement*>(child.get())
->ComputeLightAttributes(aInstance, aFloatAttributes);
}
}
return LightType::None;
}
bool SVGFELightingElement::AddLightingAttributes(
mozilla::gfx::DiffuseLightingAttributes* aAttributes,
SVGFilterInstance* aInstance) {
nsIFrame* frame = GetPrimaryFrame();
if (!frame) {
return false;
}
const nsStyleSVGReset* styleSVGReset = frame->Style()->StyleSVGReset();
sRGBColor color(
sRGBColor::FromABGR(styleSVGReset->mLightingColor.CalcColor(frame)));
color.a = 1.f;
float surfaceScale = mNumberAttributes[SURFACE_SCALE].GetAnimValue();
Size kernelUnitLength = GetKernelUnitLength(
aInstance, &mNumberPairAttributes[KERNEL_UNIT_LENGTH]);
if (kernelUnitLength.width <= 0 || kernelUnitLength.height <= 0) {
// According to spec, A negative or zero value is an error. See link below
// for details.
// https://www.w3.org/TR/SVG/filters.html#feSpecularLightingKernelUnitLengthAttribute
return false;
}
aAttributes->mLightType =
ComputeLightAttributes(aInstance, aAttributes->mLightValues);
aAttributes->mSurfaceScale = surfaceScale;
aAttributes->mKernelUnitLength = kernelUnitLength;
aAttributes->mColor = color;
return true;
}
bool SVGFELightingElement::AttributeAffectsRendering(int32_t aNameSpaceID,
nsAtom* aAttribute) const {
return SVGFELightingElementBase::AttributeAffectsRendering(aNameSpaceID,
aAttribute) ||
(aNameSpaceID == kNameSpaceID_None &&
(aAttribute == nsGkAtoms::in ||
aAttribute == nsGkAtoms::surfaceScale ||
aAttribute == nsGkAtoms::kernelUnitLength));
}
//----------------------------------------------------------------------
// SVGElement methods
SVGElement::NumberAttributesInfo SVGFELightingElement::GetNumberInfo() {
return NumberAttributesInfo(mNumberAttributes, sNumberInfo,
ArrayLength(sNumberInfo));
}
SVGElement::NumberPairAttributesInfo SVGFELightingElement::GetNumberPairInfo() {
return NumberPairAttributesInfo(mNumberPairAttributes, sNumberPairInfo,
ArrayLength(sNumberPairInfo));
}
SVGElement::StringAttributesInfo SVGFELightingElement::GetStringInfo() {
return StringAttributesInfo(mStringAttributes, sStringInfo,
ArrayLength(sStringInfo));
}
} // namespace dom
} // namespace mozilla
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