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Diffstat (limited to 'dom/svg/SVGFETurbulenceElement.cpp')
| -rw-r--r-- | dom/svg/SVGFETurbulenceElement.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/dom/svg/SVGFETurbulenceElement.cpp b/dom/svg/SVGFETurbulenceElement.cpp new file mode 100644 index 0000000000..b4e809b36b --- /dev/null +++ b/dom/svg/SVGFETurbulenceElement.cpp @@ -0,0 +1,185 @@ +/* -*- 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/SVGFETurbulenceElement.h" +#include "mozilla/dom/SVGFETurbulenceElementBinding.h" +#include "mozilla/SVGFilterInstance.h" + +NS_IMPL_NS_NEW_SVG_ELEMENT(FETurbulence) + +using namespace mozilla::gfx; + +namespace mozilla { +namespace dom { + +// Stitch Options +static const unsigned short SVG_STITCHTYPE_STITCH = 1; +static const unsigned short SVG_STITCHTYPE_NOSTITCH = 2; + +static const int32_t MAX_OCTAVES = 10; + +JSObject* SVGFETurbulenceElement::WrapNode(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) { + return SVGFETurbulenceElement_Binding::Wrap(aCx, this, aGivenProto); +} + +SVGElement::NumberInfo SVGFETurbulenceElement::sNumberInfo[1] = { + {nsGkAtoms::seed, 0, false}}; + +SVGElement::NumberPairInfo SVGFETurbulenceElement::sNumberPairInfo[1] = { + {nsGkAtoms::baseFrequency, 0, 0}}; + +SVGElement::IntegerInfo SVGFETurbulenceElement::sIntegerInfo[1] = { + {nsGkAtoms::numOctaves, 1}}; + +SVGEnumMapping SVGFETurbulenceElement::sTypeMap[] = { + {nsGkAtoms::fractalNoise, SVG_TURBULENCE_TYPE_FRACTALNOISE}, + {nsGkAtoms::turbulence, SVG_TURBULENCE_TYPE_TURBULENCE}, + {nullptr, 0}}; + +SVGEnumMapping SVGFETurbulenceElement::sStitchTilesMap[] = { + {nsGkAtoms::stitch, SVG_STITCHTYPE_STITCH}, + {nsGkAtoms::noStitch, SVG_STITCHTYPE_NOSTITCH}, + {nullptr, 0}}; + +SVGElement::EnumInfo SVGFETurbulenceElement::sEnumInfo[2] = { + {nsGkAtoms::type, sTypeMap, SVG_TURBULENCE_TYPE_TURBULENCE}, + {nsGkAtoms::stitchTiles, sStitchTilesMap, SVG_STITCHTYPE_NOSTITCH}}; + +SVGElement::StringInfo SVGFETurbulenceElement::sStringInfo[1] = { + {nsGkAtoms::result, kNameSpaceID_None, true}}; + +//---------------------------------------------------------------------- +// nsINode methods + +NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGFETurbulenceElement) + +//---------------------------------------------------------------------- + +already_AddRefed<DOMSVGAnimatedNumber> +SVGFETurbulenceElement::BaseFrequencyX() { + return mNumberPairAttributes[BASE_FREQ].ToDOMAnimatedNumber( + SVGAnimatedNumberPair::eFirst, this); +} + +already_AddRefed<DOMSVGAnimatedNumber> +SVGFETurbulenceElement::BaseFrequencyY() { + return mNumberPairAttributes[BASE_FREQ].ToDOMAnimatedNumber( + SVGAnimatedNumberPair::eSecond, this); +} + +already_AddRefed<DOMSVGAnimatedInteger> SVGFETurbulenceElement::NumOctaves() { + return mIntegerAttributes[OCTAVES].ToDOMAnimatedInteger(this); +} + +already_AddRefed<DOMSVGAnimatedNumber> SVGFETurbulenceElement::Seed() { + return mNumberAttributes[SEED].ToDOMAnimatedNumber(this); +} + +already_AddRefed<DOMSVGAnimatedEnumeration> +SVGFETurbulenceElement::StitchTiles() { + return mEnumAttributes[STITCHTILES].ToDOMAnimatedEnum(this); +} + +already_AddRefed<DOMSVGAnimatedEnumeration> SVGFETurbulenceElement::Type() { + return mEnumAttributes[TYPE].ToDOMAnimatedEnum(this); +} + +FilterPrimitiveDescription SVGFETurbulenceElement::GetPrimitiveDescription( + SVGFilterInstance* aInstance, const IntRect& aFilterSubregion, + const nsTArray<bool>& aInputsAreTainted, + nsTArray<RefPtr<SourceSurface>>& aInputImages) { + float fX = mNumberPairAttributes[BASE_FREQ].GetAnimValue( + SVGAnimatedNumberPair::eFirst); + float fY = mNumberPairAttributes[BASE_FREQ].GetAnimValue( + SVGAnimatedNumberPair::eSecond); + float seed = mNumberAttributes[OCTAVES].GetAnimValue(); + uint32_t octaves = + clamped(mIntegerAttributes[OCTAVES].GetAnimValue(), 0, MAX_OCTAVES); + uint32_t type = mEnumAttributes[TYPE].GetAnimValue(); + uint16_t stitch = mEnumAttributes[STITCHTILES].GetAnimValue(); + + if (fX == 0 && fY == 0) { + // A base frequency of zero results in transparent black for + // type="turbulence" and in 50% alpha 50% gray for type="fractalNoise". + if (type == SVG_TURBULENCE_TYPE_TURBULENCE) { + return FilterPrimitiveDescription(); + } + FloodAttributes atts; + atts.mColor = sRGBColor(0.5, 0.5, 0.5, 0.5); + return FilterPrimitiveDescription(AsVariant(std::move(atts))); + } + + // We interpret the base frequency as relative to user space units. In other + // words, we consider one turbulence base period to be 1 / fX user space + // units wide and 1 / fY user space units high. We do not scale the frequency + // depending on the filter primitive region. + // We now convert the frequency from user space to filter space. + // If a frequency in user space units is zero, then it will also be zero in + // filter space. During the conversion we use a dummy period length of 1 + // for those frequencies but then ignore the converted length and use 0 + // for the converted frequency. This avoids division by zero. + gfxRect firstPeriodInUserSpace(0, 0, fX == 0 ? 1 : (1 / fX), + fY == 0 ? 1 : (1 / fY)); + gfxRect firstPeriodInFilterSpace = + aInstance->UserSpaceToFilterSpace(firstPeriodInUserSpace); + Size frequencyInFilterSpace( + fX == 0 ? 0 : (1 / firstPeriodInFilterSpace.width), + fY == 0 ? 0 : (1 / firstPeriodInFilterSpace.height)); + gfxPoint offset = firstPeriodInFilterSpace.TopLeft(); + + TurbulenceAttributes atts; + atts.mOffset = IntPoint::Truncate(offset.x, offset.y); + atts.mBaseFrequency = frequencyInFilterSpace; + atts.mSeed = seed; + atts.mOctaves = octaves; + atts.mStitchable = stitch == SVG_STITCHTYPE_STITCH; + atts.mType = type; + return FilterPrimitiveDescription(AsVariant(std::move(atts))); +} + +bool SVGFETurbulenceElement::AttributeAffectsRendering( + int32_t aNameSpaceID, nsAtom* aAttribute) const { + return SVGFETurbulenceElementBase::AttributeAffectsRendering(aNameSpaceID, + aAttribute) || + (aNameSpaceID == kNameSpaceID_None && + (aAttribute == nsGkAtoms::seed || + aAttribute == nsGkAtoms::baseFrequency || + aAttribute == nsGkAtoms::numOctaves || + aAttribute == nsGkAtoms::type || + aAttribute == nsGkAtoms::stitchTiles)); +} + +//---------------------------------------------------------------------- +// SVGElement methods + +SVGElement::NumberAttributesInfo SVGFETurbulenceElement::GetNumberInfo() { + return NumberAttributesInfo(mNumberAttributes, sNumberInfo, + ArrayLength(sNumberInfo)); +} + +SVGElement::NumberPairAttributesInfo +SVGFETurbulenceElement::GetNumberPairInfo() { + return NumberPairAttributesInfo(mNumberPairAttributes, sNumberPairInfo, + ArrayLength(sNumberPairInfo)); +} + +SVGElement::IntegerAttributesInfo SVGFETurbulenceElement::GetIntegerInfo() { + return IntegerAttributesInfo(mIntegerAttributes, sIntegerInfo, + ArrayLength(sIntegerInfo)); +} + +SVGElement::EnumAttributesInfo SVGFETurbulenceElement::GetEnumInfo() { + return EnumAttributesInfo(mEnumAttributes, sEnumInfo, ArrayLength(sEnumInfo)); +} + +SVGElement::StringAttributesInfo SVGFETurbulenceElement::GetStringInfo() { + return StringAttributesInfo(mStringAttributes, sStringInfo, + ArrayLength(sStringInfo)); +} + +} // namespace dom +} // namespace mozilla |