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FilterInstance.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/. */
// Main header first:
#include "FilterInstance.h"
// MFBT headers next:
#include "mozilla/UniquePtr.h"
// Keep others in (case-insensitive) order:
#include "FilterSupport.h"
#include "ImgDrawResult.h"
#include "SVGContentUtils.h"
#include "gfx2DGlue.h"
#include "gfxContext.h"
#include "gfxPlatform.h"
#include "gfxUtils.h"
#include "mozilla/Unused.h"
#include "mozilla/gfx/Filters.h"
#include "mozilla/gfx/Helpers.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/gfx/PatternHelpers.h"
#include "mozilla/ISVGDisplayableFrame.h"
#include "mozilla/StaticPrefs_gfx.h"
#include "mozilla/SVGFilterInstance.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/Document.h"
#include "nsLayoutUtils.h"
#include "CSSFilterInstance.h"
#include "SVGIntegrationUtils.h"
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;
namespace mozilla {
FilterDescription FilterInstance::GetFilterDescription(
nsIContent* aFilteredElement, Span<const StyleFilter> aFilterChain,
ISVGFilterObserverList* aFiltersObserverList, bool aFilterInputIsTainted,
const UserSpaceMetrics& aMetrics, const gfxRect& aBBox,
nsTArray<RefPtr<SourceSurface>>& aOutAdditionalImages) {
gfxMatrix identity;
nsTArray<SVGFilterFrame*> filterFrames;
if (SVGObserverUtils::GetAndObserveFilters(aFiltersObserverList,
&filterFrames) ==
SVGObserverUtils::eHasRefsSomeInvalid) {
return FilterDescription();
}
FilterInstance instance(nullptr, aFilteredElement, aMetrics, aFilterChain,
filterFrames, aFilterInputIsTainted, nullptr,
identity, nullptr, nullptr, nullptr, &aBBox);
if (!instance.IsInitialized()) {
return FilterDescription();
}
return instance.ExtractDescriptionAndAdditionalImages(aOutAdditionalImages);
}
static UniquePtr<UserSpaceMetrics> UserSpaceMetricsForFrame(nsIFrame* aFrame) {
if (auto* element = SVGElement::FromNodeOrNull(aFrame->GetContent())) {
return MakeUnique<SVGElementMetrics>(element);
}
return MakeUnique<NonSVGFrameUserSpaceMetrics>(aFrame);
}
void FilterInstance::PaintFilteredFrame(
nsIFrame* aFilteredFrame, Span<const StyleFilter> aFilterChain,
const nsTArray<SVGFilterFrame*>& aFilterFrames, gfxContext* aCtx,
const SVGFilterPaintCallback& aPaintCallback, const nsRegion* aDirtyArea,
imgDrawingParams& aImgParams, float aOpacity,
const gfxRect* aOverrideBBox) {
UniquePtr<UserSpaceMetrics> metrics =
UserSpaceMetricsForFrame(aFilteredFrame);
gfxContextMatrixAutoSaveRestore autoSR(aCtx);
auto scaleFactors = aCtx->CurrentMatrixDouble().ScaleFactors();
if (scaleFactors.xScale == 0 || scaleFactors.yScale == 0) {
return;
}
gfxMatrix scaleMatrix(scaleFactors.xScale, 0.0f, 0.0f, scaleFactors.yScale,
0.0f, 0.0f);
gfxMatrix reverseScaleMatrix = scaleMatrix;
DebugOnly<bool> invertible = reverseScaleMatrix.Invert();
MOZ_ASSERT(invertible);
gfxMatrix scaleMatrixInDevUnits =
scaleMatrix * SVGUtils::GetCSSPxToDevPxMatrix(aFilteredFrame);
// Hardcode InputIsTainted to true because we don't want JS to be able to
// read the rendered contents of aFilteredFrame.
FilterInstance instance(aFilteredFrame, aFilteredFrame->GetContent(),
*metrics, aFilterChain, aFilterFrames,
/* InputIsTainted */ true, aPaintCallback,
scaleMatrixInDevUnits, aDirtyArea, nullptr, nullptr,
aOverrideBBox);
if (instance.IsInitialized()) {
// Pull scale vector out of aCtx's transform, put all scale factors, which
// includes css and css-to-dev-px scale, into scaleMatrixInDevUnits.
aCtx->SetMatrixDouble(reverseScaleMatrix * aCtx->CurrentMatrixDouble());
instance.Render(aCtx, aImgParams, aOpacity);
} else {
// Render the unfiltered contents.
aPaintCallback(*aCtx, aImgParams, nullptr, nullptr);
}
}
static mozilla::wr::ComponentTransferFuncType FuncTypeToWr(uint8_t aFuncType) {
MOZ_ASSERT(aFuncType != SVG_FECOMPONENTTRANSFER_SAME_AS_R);
switch (aFuncType) {
case SVG_FECOMPONENTTRANSFER_TYPE_TABLE:
return mozilla::wr::ComponentTransferFuncType::Table;
case SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE:
return mozilla::wr::ComponentTransferFuncType::Discrete;
case SVG_FECOMPONENTTRANSFER_TYPE_LINEAR:
return mozilla::wr::ComponentTransferFuncType::Linear;
case SVG_FECOMPONENTTRANSFER_TYPE_GAMMA:
return mozilla::wr::ComponentTransferFuncType::Gamma;
case SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY:
default:
return mozilla::wr::ComponentTransferFuncType::Identity;
}
MOZ_ASSERT_UNREACHABLE("all func types not handled?");
return mozilla::wr::ComponentTransferFuncType::Identity;
}
WrFiltersStatus FilterInstance::BuildWebRenderFilters(
nsIFrame* aFilteredFrame, Span<const StyleFilter> aFilters,
StyleFilterType aStyleFilterType, WrFiltersHolder& aWrFilters,
const nsPoint& aOffsetForSVGFilters) {
WrFiltersStatus status = WrFiltersStatus::BLOB_FALLBACK;
if (StaticPrefs::gfx_webrender_svg_filter_effects()) {
status =
BuildWebRenderSVGFiltersImpl(aFilteredFrame, aFilters, aStyleFilterType,
aWrFilters, aOffsetForSVGFilters);
}
if (status == WrFiltersStatus::BLOB_FALLBACK) {
status = BuildWebRenderFiltersImpl(aFilteredFrame, aFilters,
aStyleFilterType, aWrFilters);
}
if (status == WrFiltersStatus::BLOB_FALLBACK) {
aFilteredFrame->PresContext()->Document()->SetUseCounter(
eUseCounter_custom_WrFilterFallback);
}
return status;
}
WrFiltersStatus FilterInstance::BuildWebRenderFiltersImpl(
nsIFrame* aFilteredFrame, Span<const StyleFilter> aFilters,
StyleFilterType aStyleFilterType, WrFiltersHolder& aWrFilters) {
aWrFilters.filters.Clear();
aWrFilters.filter_datas.Clear();
aWrFilters.values.Clear();
aWrFilters.post_filters_clip = Nothing();
nsIFrame* firstFrame =
nsLayoutUtils::FirstContinuationOrIBSplitSibling(aFilteredFrame);
nsTArray<SVGFilterFrame*> filterFrames;
if (SVGObserverUtils::GetAndObserveFilters(firstFrame, &filterFrames,
aStyleFilterType) ==
SVGObserverUtils::eHasRefsSomeInvalid) {
return WrFiltersStatus::UNSUPPORTED;
}
UniquePtr<UserSpaceMetrics> metrics = UserSpaceMetricsForFrame(firstFrame);
// TODO: simply using an identity matrix here, was pulling the scale from a
// gfx context for the non-wr path.
gfxMatrix scaleMatrix;
gfxMatrix scaleMatrixInDevUnits =
scaleMatrix * SVGUtils::GetCSSPxToDevPxMatrix(firstFrame);
// Hardcode inputIsTainted to true because we don't want JS to be able to
// read the rendered contents of aFilteredFrame.
FilterInstance instance(firstFrame, firstFrame->GetContent(), *metrics,
aFilters, filterFrames, /* inputIsTainted */ true,
nullptr, scaleMatrixInDevUnits, nullptr, nullptr,
nullptr, nullptr);
if (!instance.IsInitialized()) {
return WrFiltersStatus::UNSUPPORTED;
}
// If there are too many filters to render, then just pretend that we
// succeeded, and don't render any of them.
if (instance.mFilterDescription.mPrimitives.Length() >
StaticPrefs::gfx_webrender_max_filter_ops_per_chain()) {
return WrFiltersStatus::DISABLED_FOR_PERFORMANCE;
}
Maybe<IntRect> finalClip;
bool srgb = true;
// We currently apply the clip on the stacking context after applying filters,
// but primitive subregions imply clipping after each filter and not just the
// end of the chain. For some types of filter it doesn't matter, but for those
// which sample outside of the location of the destination pixel like blurs,
// only clipping after could produce incorrect results, so we bail out in this
// case.
// We can lift this restriction once we have added support for primitive
// subregions to WebRender's filters.
for (uint32_t i = 0; i < instance.mFilterDescription.mPrimitives.Length();
i++) {
const auto& primitive = instance.mFilterDescription.mPrimitives[i];
// WebRender only supports filters with one input.
if (primitive.NumberOfInputs() != 1) {
return WrFiltersStatus::BLOB_FALLBACK;
}
// The first primitive must have the source graphic as the input, all
// other primitives must have the prior primitive as the input, otherwise
// it's not supported by WebRender.
if (i == 0) {
if (primitive.InputPrimitiveIndex(0) !=
FilterPrimitiveDescription::kPrimitiveIndexSourceGraphic) {
return WrFiltersStatus::BLOB_FALLBACK;
}
} else if (primitive.InputPrimitiveIndex(0) != int32_t(i - 1)) {
return WrFiltersStatus::BLOB_FALLBACK;
}
bool previousSrgb = srgb;
bool primNeedsSrgb = primitive.InputColorSpace(0) == gfx::ColorSpace::SRGB;
if (srgb && !primNeedsSrgb) {
aWrFilters.filters.AppendElement(wr::FilterOp::SrgbToLinear());
} else if (!srgb && primNeedsSrgb) {
aWrFilters.filters.AppendElement(wr::FilterOp::LinearToSrgb());
}
srgb = primitive.OutputColorSpace() == gfx::ColorSpace::SRGB;
const PrimitiveAttributes& attr = primitive.Attributes();
bool filterIsNoop = false;
if (attr.is<OpacityAttributes>()) {
float opacity = attr.as<OpacityAttributes>().mOpacity;
aWrFilters.filters.AppendElement(wr::FilterOp::Opacity(
wr::PropertyBinding<float>::Value(opacity), opacity));
} else if (attr.is<ColorMatrixAttributes>()) {
const ColorMatrixAttributes& attributes =
attr.as<ColorMatrixAttributes>();
float transposed[20];
if (gfx::ComputeColorMatrix(attributes, transposed)) {
float matrix[20] = {
transposed[0], transposed[5], transposed[10], transposed[15],
transposed[1], transposed[6], transposed[11], transposed[16],
transposed[2], transposed[7], transposed[12], transposed[17],
transposed[3], transposed[8], transposed[13], transposed[18],
transposed[4], transposed[9], transposed[14], transposed[19]};
aWrFilters.filters.AppendElement(wr::FilterOp::ColorMatrix(matrix));
} else {
filterIsNoop = true;
}
} else if (attr.is<GaussianBlurAttributes>()) {
if (finalClip) {
// There's a clip that needs to apply before the blur filter, but
// WebRender only lets us apply the clip at the end of the filter
// chain. Clipping after a blur is not equivalent to clipping before
// a blur, so bail out.
return WrFiltersStatus::BLOB_FALLBACK;
}
const GaussianBlurAttributes& blur = attr.as<GaussianBlurAttributes>();
const Size& stdDev = blur.mStdDeviation;
if (stdDev.width != 0.0 || stdDev.height != 0.0) {
aWrFilters.filters.AppendElement(
wr::FilterOp::Blur(stdDev.width, stdDev.height));
} else {
filterIsNoop = true;
}
} else if (attr.is<DropShadowAttributes>()) {
if (finalClip) {
// We have to bail out for the same reason we would with a blur filter.
return WrFiltersStatus::BLOB_FALLBACK;
}
const DropShadowAttributes& shadow = attr.as<DropShadowAttributes>();
const Size& stdDev = shadow.mStdDeviation;
if (stdDev.width != stdDev.height) {
return WrFiltersStatus::BLOB_FALLBACK;
}
sRGBColor color = shadow.mColor;
if (!primNeedsSrgb) {
color = sRGBColor(gsRGBToLinearRGBMap[uint8_t(color.r * 255)],
gsRGBToLinearRGBMap[uint8_t(color.g * 255)],
gsRGBToLinearRGBMap[uint8_t(color.b * 255)], color.a);
}
wr::Shadow wrShadow;
wrShadow.offset = {shadow.mOffset.x, shadow.mOffset.y};
wrShadow.color = wr::ToColorF(ToDeviceColor(color));
wrShadow.blur_radius = stdDev.width;
wr::FilterOp filterOp = wr::FilterOp::DropShadow(wrShadow);
aWrFilters.filters.AppendElement(filterOp);
} else if (attr.is<ComponentTransferAttributes>()) {
const ComponentTransferAttributes& attributes =
attr.as<ComponentTransferAttributes>();
size_t numValues =
attributes.mValues[0].Length() + attributes.mValues[1].Length() +
attributes.mValues[2].Length() + attributes.mValues[3].Length();
if (numValues > 1024) {
// Depending on how the wr shaders are implemented we may need to
// limit the total number of values.
return WrFiltersStatus::BLOB_FALLBACK;
}
wr::FilterOp filterOp = {wr::FilterOp::Tag::ComponentTransfer};
wr::WrFilterData filterData;
aWrFilters.values.AppendElement(nsTArray<float>());
nsTArray<float>* values =
&aWrFilters.values[aWrFilters.values.Length() - 1];
values->SetCapacity(numValues);
filterData.funcR_type = FuncTypeToWr(attributes.mTypes[0]);
size_t R_startindex = values->Length();
values->AppendElements(attributes.mValues[0]);
filterData.R_values_count = attributes.mValues[0].Length();
size_t indexToUse =
attributes.mTypes[1] == SVG_FECOMPONENTTRANSFER_SAME_AS_R ? 0 : 1;
filterData.funcG_type = FuncTypeToWr(attributes.mTypes[indexToUse]);
size_t G_startindex = values->Length();
values->AppendElements(attributes.mValues[indexToUse]);
filterData.G_values_count = attributes.mValues[indexToUse].Length();
indexToUse =
attributes.mTypes[2] == SVG_FECOMPONENTTRANSFER_SAME_AS_R ? 0 : 2;
filterData.funcB_type = FuncTypeToWr(attributes.mTypes[indexToUse]);
size_t B_startindex = values->Length();
values->AppendElements(attributes.mValues[indexToUse]);
filterData.B_values_count = attributes.mValues[indexToUse].Length();
filterData.funcA_type = FuncTypeToWr(attributes.mTypes[3]);
size_t A_startindex = values->Length();
values->AppendElements(attributes.mValues[3]);
filterData.A_values_count = attributes.mValues[3].Length();
filterData.R_values =
filterData.R_values_count > 0 ? &((*values)[R_startindex]) : nullptr;
filterData.G_values =
filterData.G_values_count > 0 ? &((*values)[G_startindex]) : nullptr;
filterData.B_values =
filterData.B_values_count > 0 ? &((*values)[B_startindex]) : nullptr;
filterData.A_values =
filterData.A_values_count > 0 ? &((*values)[A_startindex]) : nullptr;
aWrFilters.filters.AppendElement(filterOp);
aWrFilters.filter_datas.AppendElement(filterData);
} else {
return WrFiltersStatus::BLOB_FALLBACK;
}
if (filterIsNoop && aWrFilters.filters.Length() > 0 &&
(aWrFilters.filters.LastElement().tag ==
wr::FilterOp::Tag::SrgbToLinear ||
aWrFilters.filters.LastElement().tag ==
wr::FilterOp::Tag::LinearToSrgb)) {
// We pushed a color space conversion filter in prevision of applying
// another filter which turned out to be a no-op, so the conversion is
// unnecessary. Remove it from the filter list.
// This is both an optimization and a way to pass the wptest
// css/filter-effects/filter-scale-001.html for which the needless
// sRGB->linear->no-op->sRGB roundtrip introduces a slight error and we
// cannot add fuzziness to the test.
Unused << aWrFilters.filters.PopLastElement();
srgb = previousSrgb;
}
if (!filterIsNoop) {
if (finalClip.isNothing()) {
finalClip = Some(primitive.PrimitiveSubregion());
} else {
finalClip =
Some(primitive.PrimitiveSubregion().Intersect(finalClip.value()));
}
}
}
if (!srgb) {
aWrFilters.filters.AppendElement(wr::FilterOp::LinearToSrgb());
}
if (finalClip) {
aWrFilters.post_filters_clip =
Some(instance.FilterSpaceToFrameSpace(finalClip.value()));
}
return WrFiltersStatus::CHAIN;
}
static WrFiltersStatus WrSVGFEInputBuild(wr::FilterOpGraphPictureReference& pic,
int32_t aSource, int16_t aNodeOutput,
int16_t aSourceGraphic,
int16_t aSourceAlpha,
const int16_t aBufferIdMapping[]) {
switch (aSource) {
case FilterPrimitiveDescription::kPrimitiveIndexSourceGraphic:
pic.buffer_id =
wr::FilterOpGraphPictureBufferId::BufferId(aSourceGraphic);
break;
case FilterPrimitiveDescription::kPrimitiveIndexSourceAlpha:
pic.buffer_id = wr::FilterOpGraphPictureBufferId::BufferId(aSourceAlpha);
break;
case FilterPrimitiveDescription::kPrimitiveIndexFillPaint:
case FilterPrimitiveDescription::kPrimitiveIndexStrokePaint:
// https://bugzilla.mozilla.org/show_bug.cgi?id=1897878
// Fill and Stroke paints are not yet supported by WebRender, they may be
// a color (most common) or pattern fill, so we could implement them with
// feFlood or feImage + feTile depending on the nature of the fill.
return WrFiltersStatus::BLOB_FALLBACK;
default:
MOZ_RELEASE_ASSERT(
aSource >= 0,
"Unrecognized SVG filter primitive enum value - added another?");
MOZ_RELEASE_ASSERT(aSource < aNodeOutput,
"Invalid DAG - nodes can only refer to earlier nodes");
if (aSource < 0 || aSource >= aNodeOutput) {
return WrFiltersStatus::UNSUPPORTED;
}
// Look up the node we remapped this id to.
// This can't overflow because aSource < aNodeOutput and the table is the
// same size.
pic.buffer_id =
wr::FilterOpGraphPictureBufferId::BufferId(aBufferIdMapping[aSource]);
break;
}
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEOpacity(
WrFiltersHolder& aWrFilters, const wr::FilterOpGraphNode& aGraphNode,
const OpacityAttributes& aAttributes) {
// CSS opacity
// This is the only CSS property that is has no direct analog in SVG, although
// technically it can be represented as SVGFEComponentTransfer or
// SVGFEColorMatrix or SVGFECompositeArithmetic, those would be inefficient
// approaches.
if (!StaticPrefs::gfx_webrender_svg_filter_effects_opacity()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
float opacity = aAttributes.mOpacity;
if (opacity != 1.0f) {
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEOpacity(
aGraphNode, wr::PropertyBinding<float>::Value(opacity), opacity));
} else {
// If it's a no-op, we still have to generate a graph node
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEIdentity(aGraphNode));
}
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEToAlpha(
WrFiltersHolder& aWrFilters, const wr::FilterOpGraphNode& aGraphNode,
const ToAlphaAttributes& aAttributes) {
// Convert a color image to an alpha channel - internal use; generated by
// SVGFilterInstance::GetOrCreateSourceAlphaIndex().
if (!StaticPrefs::GetPrefName_gfx_webrender_svg_filter_effects_toalpha()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEToAlpha(aGraphNode));
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEBlend(
WrFiltersHolder& aWrFilters, const wr::FilterOpGraphNode& aGraphNode,
const BlendAttributes& aAttributes) {
// SVGFEBlend - common
if (!StaticPrefs::gfx_webrender_svg_filter_effects_feblend()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
switch (aAttributes.mBlendMode) {
case SVG_FEBLEND_MODE_COLOR:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendColor(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_COLOR_BURN:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendColorBurn(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_COLOR_DODGE:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendColorDodge(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_DARKEN:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendDarken(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_DIFFERENCE:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendDifference(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_EXCLUSION:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendExclusion(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_HARD_LIGHT:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendHardLight(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_HUE:
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEBlendHue(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_LIGHTEN:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendLighten(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_LUMINOSITY:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendLuminosity(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_MULTIPLY:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendMultiply(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_NORMAL:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendNormal(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_OVERLAY:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendOverlay(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_SATURATION:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendSaturation(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_SCREEN:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendScreen(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FEBLEND_MODE_SOFT_LIGHT:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEBlendSoftLight(aGraphNode));
return WrFiltersStatus::SVGFE;
default:
break;
}
MOZ_CRASH("Unrecognized SVG_FEBLEND_MODE");
return WrFiltersStatus::BLOB_FALLBACK;
}
static WrFiltersStatus WrFilterOpSVGFEComposite(
WrFiltersHolder& aWrFilters, const wr::FilterOpGraphNode& aGraphNode,
const CompositeAttributes& aAttributes) {
// SVGFEComposite - common
if (!StaticPrefs::gfx_webrender_svg_filter_effects_fecomposite()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
switch (aAttributes.mOperator) {
case SVG_FECOMPOSITE_OPERATOR_ARITHMETIC:
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFECompositeArithmetic(
aGraphNode, aAttributes.mCoefficients[0],
aAttributes.mCoefficients[1], aAttributes.mCoefficients[2],
aAttributes.mCoefficients[3]));
return WrFiltersStatus::SVGFE;
case SVG_FECOMPOSITE_OPERATOR_ATOP:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFECompositeATop(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FECOMPOSITE_OPERATOR_IN:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFECompositeIn(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FECOMPOSITE_OPERATOR_LIGHTER:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFECompositeLighter(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FECOMPOSITE_OPERATOR_OUT:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFECompositeOut(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FECOMPOSITE_OPERATOR_OVER:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFECompositeOver(aGraphNode));
return WrFiltersStatus::SVGFE;
case SVG_FECOMPOSITE_OPERATOR_XOR:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFECompositeXOR(aGraphNode));
return WrFiltersStatus::SVGFE;
default:
break;
}
MOZ_CRASH("Unrecognized SVG_FECOMPOSITE_OPERATOR");
return WrFiltersStatus::BLOB_FALLBACK;
}
static WrFiltersStatus WrFilterOpSVGFEColorMatrix(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const ColorMatrixAttributes& aAttributes) {
// SVGFEColorMatrix - common
if (!StaticPrefs::gfx_webrender_svg_filter_effects_fecolormatrix()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
float transposed[20];
if (gfx::ComputeColorMatrix(aAttributes, transposed)) {
float matrix[20] = {
transposed[0], transposed[5], transposed[10], transposed[15],
transposed[1], transposed[6], transposed[11], transposed[16],
transposed[2], transposed[7], transposed[12], transposed[17],
transposed[3], transposed[8], transposed[13], transposed[18],
transposed[4], transposed[9], transposed[14], transposed[19]};
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEColorMatrix(aGraphNode, matrix));
} else {
// If it's a no-op, we still have to generate a graph node
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEIdentity(aGraphNode));
}
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEComponentTransfer(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const ComponentTransferAttributes& aAttributes) {
// SVGFEComponentTransfer - common
if (!StaticPrefs::gfx_webrender_svg_filter_effects_fecomponenttransfer()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
// We ensure that there are at least 256 values for each channel so that
// the shader can skip interpolation math for simplicity.
size_t stops = 256;
for (const auto& v : aAttributes.mValues) {
if (stops < v.Length()) {
stops = v.Length();
}
}
aWrFilters.values.AppendElement(nsTArray<float>());
nsTArray<float>& values = aWrFilters.values[aWrFilters.values.Length() - 1];
values.SetCapacity(stops * 4);
// Set the FilterData funcs for whether or not to interpolate the values
// between stops, although we use enough stops that it may not matter.
// The only type that doesn't use interpolation is discrete.
wr::WrFilterData filterData{};
filterData.funcR_type =
aAttributes.mTypes[0] != SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE
? mozilla::wr::ComponentTransferFuncType::Table
: mozilla::wr::ComponentTransferFuncType::Discrete;
filterData.funcG_type =
aAttributes.mTypes[1] != SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE
? mozilla::wr::ComponentTransferFuncType::Table
: mozilla::wr::ComponentTransferFuncType::Discrete;
filterData.funcB_type =
aAttributes.mTypes[2] != SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE
? mozilla::wr::ComponentTransferFuncType::Table
: mozilla::wr::ComponentTransferFuncType::Discrete;
filterData.funcA_type =
aAttributes.mTypes[3] != SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE
? mozilla::wr::ComponentTransferFuncType::Table
: mozilla::wr::ComponentTransferFuncType::Discrete;
// This is a bit of a strange way to store the table, it is an interleaved
// array of RGBA values that we want to store in a single gpucache array
// of raw pixels, so it's easiest to send it to WebRender as a single
// channel, but FilterData requires it to be 4 channels, so we send it as
// 4 groups of values but the data is interleaved.
values.SetLength(stops * 4);
filterData.R_values = &(values[0]);
filterData.R_values_count = stops;
filterData.G_values = &(values[stops]);
filterData.G_values_count = stops;
filterData.B_values = &(values[stops * 2]);
filterData.B_values_count = stops;
filterData.A_values = &(values[stops * 3]);
filterData.A_values_count = stops;
// This builds a single interleaved RGBA table as it is well suited to GPU
// texture fetches without any dynamic component indexing in the shader which
// can confuse buggy shader compilers.
for (size_t c = 0; c < 4; c++) {
auto f = aAttributes.mTypes[c];
// Check if there's no data (we have crashtests for this).
if (aAttributes.mValues[c].Length() < 1 &&
f != SVG_FECOMPONENTTRANSFER_SAME_AS_R) {
f = SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY;
}
// Check for misuse of SVG_FECOMPONENTTRANSFER_SAME_AS_R.
if (c == 0 && f == SVG_FECOMPONENTTRANSFER_SAME_AS_R) {
f = SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY;
}
switch (f) {
case SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: {
size_t length = (size_t)aAttributes.mValues[c].Length();
size_t length1 = length - 1;
float step = (float)length / (float)stops;
for (size_t i = 0; i < stops; i++) {
// find the corresponding color in the table
// this can not overflow due to the length check
float kf = (float)i * step;
float floorkf = floor(kf);
size_t k = (size_t)floorkf;
k = std::min(k, length1);
float v = aAttributes.mValues[c][k];
v = std::clamp(v, 0.0f, 1.0f);
values[i * 4 + c] = v;
}
break;
}
case SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: {
float step = 1.0f / (float)(stops - 1);
float amplitude = aAttributes.mValues[c][0];
float exponent = aAttributes.mValues[c][1];
float offset = aAttributes.mValues[c][2];
for (size_t i = 0; i < stops; i++) {
float v = amplitude * pow((float)i * step, exponent) + offset;
v = std::clamp(v, 0.0f, 1.0f);
values[i * 4 + c] = v;
}
break;
}
case SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY: {
float step = 1.0f / (float)(stops - 1);
for (size_t i = 0; i < stops; i++) {
float v = (float)i * step;
v = std::clamp(v, 0.0f, 1.0f);
values[i * 4 + c] = v;
}
break;
}
case SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: {
float step = aAttributes.mValues[c][0] / (float)(stops - 1);
float intercept = aAttributes.mValues[c][1];
for (size_t i = 0; i < stops; i++) {
float v = (float)i * step + intercept;
v = std::clamp(v, 0.0f, 1.0f);
values[i * 4 + c] = v;
}
break;
}
case SVG_FECOMPONENTTRANSFER_TYPE_TABLE: {
size_t length1 = (size_t)aAttributes.mValues[c].Length() - 1;
float step = (float)length1 / (float)(stops - 1);
for (size_t i = 0; i < stops; i++) {
// Find the corresponding color in the table and interpolate
float kf = (float)i * step;
float floorkf = floor(kf);
size_t k = (size_t)floorkf;
float v1 = aAttributes.mValues[c][k];
float v2 = aAttributes.mValues[c][(k + 1 <= length1) ? k + 1 : k];
float v = v1 + (v2 - v1) * (kf - floorkf);
v = std::clamp(v, 0.0f, 1.0f);
values[i * 4 + c] = v;
}
break;
}
case SVG_FECOMPONENTTRANSFER_SAME_AS_R: {
// We already checked c > 0 above.
for (size_t i = 0; i < stops; i++) {
values[i * 4 + c] = values[i * 4];
}
break;
}
default: {
MOZ_CRASH("Unrecognized feComponentTransfer type");
return WrFiltersStatus::BLOB_FALLBACK;
}
}
}
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEComponentTransfer(aGraphNode));
aWrFilters.filter_datas.AppendElement(filterData);
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEConvolveMatrix(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const ConvolveMatrixAttributes& aAttributes) {
// SVGFEConvolveMatrix - extremely rare
if (!StaticPrefs::gfx_webrender_svg_filter_effects_feconvolvematrix()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
// Limited kernel size for performance reasons - spec allows us to drop
// the whole filter graph if anything is unreasonable, so we only support
// up to 5x5 kernel as that is pretty fast in hardware
static constexpr int32_t width = 5;
static constexpr int32_t height = 5;
if (aAttributes.mKernelSize.Width() < 1 ||
aAttributes.mKernelSize.Width() > width ||
aAttributes.mKernelSize.Height() < 1 ||
aAttributes.mKernelSize.Height() > height ||
(size_t)aAttributes.mKernelSize.Width() *
(size_t)aAttributes.mKernelSize.Height() >
width * height) {
return WrFiltersStatus::BLOB_FALLBACK;
}
// Reject kernel matrix if it is fewer values than dimensions suggest
if (aAttributes.mKernelMatrix.Length() <
(size_t)aAttributes.mKernelSize.Width() *
(size_t)aAttributes.mKernelSize.Height()) {
return WrFiltersStatus::UNSUPPORTED;
}
// Arrange the values in the order the shader expects
float matrix[width * height];
for (size_t y = 0; y < height; y++) {
for (size_t x = 0; x < width; x++) {
if (x < (size_t)aAttributes.mKernelSize.Width() &&
y < (size_t)aAttributes.mKernelSize.Height()) {
matrix[y * width + x] =
aAttributes.mKernelMatrix[y * aAttributes.mKernelSize.Width() + x];
} else {
matrix[y * width + x] = 0.0f;
}
}
}
switch (aAttributes.mEdgeMode) {
case SVG_EDGEMODE_UNKNOWN:
case SVG_EDGEMODE_DUPLICATE:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEConvolveMatrixEdgeModeDuplicate(
aGraphNode, aAttributes.mKernelSize.Width(),
aAttributes.mKernelSize.Height(), matrix, aAttributes.mDivisor,
aAttributes.mBias, aAttributes.mTarget.x.value,
aAttributes.mTarget.y.value,
aAttributes.mKernelUnitLength.Width(),
aAttributes.mKernelUnitLength.Height(),
aAttributes.mPreserveAlpha));
return WrFiltersStatus::SVGFE;
case SVG_EDGEMODE_NONE:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEConvolveMatrixEdgeModeNone(
aGraphNode, aAttributes.mKernelSize.Width(),
aAttributes.mKernelSize.Height(), matrix, aAttributes.mDivisor,
aAttributes.mBias, aAttributes.mTarget.x.value,
aAttributes.mTarget.y.value,
aAttributes.mKernelUnitLength.Width(),
aAttributes.mKernelUnitLength.Height(),
aAttributes.mPreserveAlpha));
return WrFiltersStatus::SVGFE;
case SVG_EDGEMODE_WRAP:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEConvolveMatrixEdgeModeWrap(
aGraphNode, aAttributes.mKernelSize.Width(),
aAttributes.mKernelSize.Height(), matrix, aAttributes.mDivisor,
aAttributes.mBias, aAttributes.mTarget.x.value,
aAttributes.mTarget.y.value,
aAttributes.mKernelUnitLength.Width(),
aAttributes.mKernelUnitLength.Height(),
aAttributes.mPreserveAlpha));
return WrFiltersStatus::SVGFE;
default:
break;
}
MOZ_CRASH("Unrecognized SVG_EDGEMODE");
return WrFiltersStatus::BLOB_FALLBACK;
}
static WrFiltersStatus WrFilterOpSVGFEDiffuseLighting(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const DiffuseLightingAttributes& aAttributes,
const LayoutDevicePoint& aUserspaceOffset) {
// SVGFEDiffuseLighting - extremely rare
if (!StaticPrefs::gfx_webrender_svg_filter_effects_fediffuselighting()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
switch (aAttributes.mLightType) {
case LightType::Distant:
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEDiffuseLightingDistant(
aGraphNode, aAttributes.mSurfaceScale,
aAttributes.mLightingConstant,
aAttributes.mKernelUnitLength.width,
aAttributes.mKernelUnitLength.height, aAttributes.mLightValues[0],
aAttributes.mLightValues[1]));
return WrFiltersStatus::SVGFE;
case LightType::Point:
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEDiffuseLightingPoint(
aGraphNode, aAttributes.mSurfaceScale, aAttributes.mLightingConstant,
aAttributes.mKernelUnitLength.width,
aAttributes.mKernelUnitLength.height,
aAttributes.mLightValues[0] + aUserspaceOffset.x.value,
aAttributes.mLightValues[1] + aUserspaceOffset.y.value,
aAttributes.mLightValues[2]));
return WrFiltersStatus::SVGFE;
case LightType::Spot:
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEDiffuseLightingSpot(
aGraphNode, aAttributes.mSurfaceScale, aAttributes.mLightingConstant,
aAttributes.mKernelUnitLength.width,
aAttributes.mKernelUnitLength.height,
aAttributes.mLightValues[0] + aUserspaceOffset.x.value,
aAttributes.mLightValues[1] + aUserspaceOffset.y.value,
aAttributes.mLightValues[2],
aAttributes.mLightValues[3] + aUserspaceOffset.x.value,
aAttributes.mLightValues[4] + aUserspaceOffset.y.value,
aAttributes.mLightValues[5], aAttributes.mLightValues[6],
aAttributes.mLightValues[7]));
return WrFiltersStatus::SVGFE;
case LightType::None:
case LightType::Max:
// No default case, so that the compiler will warn if new enums are added
break;
}
MOZ_CRASH("Unrecognized LightType");
return WrFiltersStatus::BLOB_FALLBACK;
}
static WrFiltersStatus WrFilterOpSVGFEDisplacementMap(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const DisplacementMapAttributes& aAttributes) {
// SVGFEDisplacementMap - extremely rare
if (!StaticPrefs::gfx_webrender_svg_filter_effects_fedisplacementmap()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEDisplacementMap(
aGraphNode, aAttributes.mScale, aAttributes.mXChannel,
aAttributes.mYChannel));
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEDropShadow(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const DropShadowAttributes& aAttributes) {
// SVGFEDropShadow - extremely rare
if (!StaticPrefs::gfx_webrender_svg_filter_effects_fedropshadow()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
// This color is used in a shader coefficient that is in sRGB color space,
// so it needs to go through the regular device color transformation.
// This does not premultiply the alpha - the shader will do that.
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEDropShadow(
aGraphNode, wr::ToColorF(ToDeviceColor(aAttributes.mColor)),
aAttributes.mOffset.x, aAttributes.mOffset.y,
aAttributes.mStdDeviation.width, aAttributes.mStdDeviation.height));
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEFlood(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const FloodAttributes& aAttributes) {
// SVGFEFlood - common
if (!StaticPrefs::gfx_webrender_svg_filter_effects_feflood()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
// This color is used in a shader coefficient that is in sRGB color space,
// so it needs to go through the regular device color transformation.
// This does not premultiply the alpha - the shader will do that.
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEFlood(
aGraphNode, wr::ToColorF(ToDeviceColor(aAttributes.mColor))));
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEGaussianBlur(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const GaussianBlurAttributes& aAttributes) {
// SVGFEGaussianBlur - common
if (!StaticPrefs::gfx_webrender_svg_filter_effects_fegaussianblur()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
aWrFilters.filters.AppendElement(wr::FilterOp::SVGFEGaussianBlur(
aGraphNode, aAttributes.mStdDeviation.width,
aAttributes.mStdDeviation.height));
return WrFiltersStatus::SVGFE;
}
static WrFiltersStatus WrFilterOpSVGFEImage(
WrFiltersHolder& aWrFilters, wr::FilterOpGraphNode& aGraphNode,
const ImageAttributes& aAttributes,
const LayoutDevicePoint& aUserspaceOffset) {
// SVGFEImage - Extremely rare
if (!StaticPrefs::gfx_webrender_svg_filter_effects_feimage()) {
// Fallback if pref is disabled
return WrFiltersStatus::BLOB_FALLBACK;
}
float matrix[6];
matrix[0] = aAttributes.mTransform.components[0];
matrix[1] = aAttributes.mTransform.components[1];
matrix[2] = aAttributes.mTransform.components[2];
matrix[3] = aAttributes.mTransform.components[3];
matrix[4] = aAttributes.mTransform.components[4] + aUserspaceOffset.x.value;
matrix[5] = aAttributes.mTransform.components[5] + aUserspaceOffset.y.value;
// TODO: We need to resolve aAttributes.mInputIndex to an actual image
// somehow.
aWrFilters.filters.AppendElement(
wr::FilterOp::SVGFEImage(aGraphNode, aAttributes.mFilter, matrix));
return WrFiltersStatus::SVGFE;