Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1957 insertions, 0 deletions

diff --git a/gfx/src/FilterSupport.cpp b/gfx/src/FilterSupport.cpp
new file mode 100644
index 0000000000..d46de042f7
--- /dev/null
+++ b/gfx/src/FilterSupport.cpp
@@ -0,0 +1,1957 @@
+/* -*- 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 "FilterSupport.h"
+#include "FilterDescription.h"
+
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Filters.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/PodOperations.h"
+
+#include "gfxContext.h"
+#include "gfxPattern.h"
+#include "gfxPlatform.h"
+#include "gfxUtils.h"
+#include "gfx2DGlue.h"
+
+#include "nsMargin.h"
+
+// c = n / 255
+// c <= 0.0031308f ? c * 12.92f : 1.055f * powf(c, 1 / 2.4f) - 0.055f
+static const float glinearRGBTosRGBMap[256] = {
+    0.000f, 0.050f, 0.085f, 0.111f, 0.132f, 0.150f, 0.166f, 0.181f, 0.194f,
+    0.207f, 0.219f, 0.230f, 0.240f, 0.250f, 0.260f, 0.269f, 0.278f, 0.286f,
+    0.295f, 0.303f, 0.310f, 0.318f, 0.325f, 0.332f, 0.339f, 0.346f, 0.352f,
+    0.359f, 0.365f, 0.371f, 0.378f, 0.383f, 0.389f, 0.395f, 0.401f, 0.406f,
+    0.412f, 0.417f, 0.422f, 0.427f, 0.433f, 0.438f, 0.443f, 0.448f, 0.452f,
+    0.457f, 0.462f, 0.466f, 0.471f, 0.476f, 0.480f, 0.485f, 0.489f, 0.493f,
+    0.498f, 0.502f, 0.506f, 0.510f, 0.514f, 0.518f, 0.522f, 0.526f, 0.530f,
+    0.534f, 0.538f, 0.542f, 0.546f, 0.549f, 0.553f, 0.557f, 0.561f, 0.564f,
+    0.568f, 0.571f, 0.575f, 0.579f, 0.582f, 0.586f, 0.589f, 0.592f, 0.596f,
+    0.599f, 0.603f, 0.606f, 0.609f, 0.613f, 0.616f, 0.619f, 0.622f, 0.625f,
+    0.629f, 0.632f, 0.635f, 0.638f, 0.641f, 0.644f, 0.647f, 0.650f, 0.653f,
+    0.656f, 0.659f, 0.662f, 0.665f, 0.668f, 0.671f, 0.674f, 0.677f, 0.680f,
+    0.683f, 0.685f, 0.688f, 0.691f, 0.694f, 0.697f, 0.699f, 0.702f, 0.705f,
+    0.708f, 0.710f, 0.713f, 0.716f, 0.718f, 0.721f, 0.724f, 0.726f, 0.729f,
+    0.731f, 0.734f, 0.737f, 0.739f, 0.742f, 0.744f, 0.747f, 0.749f, 0.752f,
+    0.754f, 0.757f, 0.759f, 0.762f, 0.764f, 0.767f, 0.769f, 0.772f, 0.774f,
+    0.776f, 0.779f, 0.781f, 0.784f, 0.786f, 0.788f, 0.791f, 0.793f, 0.795f,
+    0.798f, 0.800f, 0.802f, 0.805f, 0.807f, 0.809f, 0.812f, 0.814f, 0.816f,
+    0.818f, 0.821f, 0.823f, 0.825f, 0.827f, 0.829f, 0.832f, 0.834f, 0.836f,
+    0.838f, 0.840f, 0.843f, 0.845f, 0.847f, 0.849f, 0.851f, 0.853f, 0.855f,
+    0.857f, 0.860f, 0.862f, 0.864f, 0.866f, 0.868f, 0.870f, 0.872f, 0.874f,
+    0.876f, 0.878f, 0.880f, 0.882f, 0.884f, 0.886f, 0.888f, 0.890f, 0.892f,
+    0.894f, 0.896f, 0.898f, 0.900f, 0.902f, 0.904f, 0.906f, 0.908f, 0.910f,
+    0.912f, 0.914f, 0.916f, 0.918f, 0.920f, 0.922f, 0.924f, 0.926f, 0.928f,
+    0.930f, 0.931f, 0.933f, 0.935f, 0.937f, 0.939f, 0.941f, 0.943f, 0.945f,
+    0.946f, 0.948f, 0.950f, 0.952f, 0.954f, 0.956f, 0.957f, 0.959f, 0.961f,
+    0.963f, 0.965f, 0.967f, 0.968f, 0.970f, 0.972f, 0.974f, 0.975f, 0.977f,
+    0.979f, 0.981f, 0.983f, 0.984f, 0.986f, 0.988f, 0.990f, 0.991f, 0.993f,
+    0.995f, 0.997f, 0.998f, 1.000f};
+
+// c = n / 255
+// c <= 0.04045f ? c / 12.92f : powf((c + 0.055f) / 1.055f, 2.4f)
+extern const float gsRGBToLinearRGBMap[256] = {
+    0.000f, 0.000f, 0.001f, 0.001f, 0.001f, 0.002f, 0.002f, 0.002f, 0.002f,
+    0.003f, 0.003f, 0.003f, 0.004f, 0.004f, 0.004f, 0.005f, 0.005f, 0.006f,
+    0.006f, 0.007f, 0.007f, 0.007f, 0.008f, 0.009f, 0.009f, 0.010f, 0.010f,
+    0.011f, 0.012f, 0.012f, 0.013f, 0.014f, 0.014f, 0.015f, 0.016f, 0.017f,
+    0.018f, 0.019f, 0.019f, 0.020f, 0.021f, 0.022f, 0.023f, 0.024f, 0.025f,
+    0.026f, 0.027f, 0.028f, 0.030f, 0.031f, 0.032f, 0.033f, 0.034f, 0.036f,
+    0.037f, 0.038f, 0.040f, 0.041f, 0.042f, 0.044f, 0.045f, 0.047f, 0.048f,
+    0.050f, 0.051f, 0.053f, 0.054f, 0.056f, 0.058f, 0.060f, 0.061f, 0.063f,
+    0.065f, 0.067f, 0.068f, 0.070f, 0.072f, 0.074f, 0.076f, 0.078f, 0.080f,
+    0.082f, 0.084f, 0.087f, 0.089f, 0.091f, 0.093f, 0.095f, 0.098f, 0.100f,
+    0.102f, 0.105f, 0.107f, 0.109f, 0.112f, 0.114f, 0.117f, 0.120f, 0.122f,
+    0.125f, 0.127f, 0.130f, 0.133f, 0.136f, 0.138f, 0.141f, 0.144f, 0.147f,
+    0.150f, 0.153f, 0.156f, 0.159f, 0.162f, 0.165f, 0.168f, 0.171f, 0.175f,
+    0.178f, 0.181f, 0.184f, 0.188f, 0.191f, 0.195f, 0.198f, 0.202f, 0.205f,
+    0.209f, 0.212f, 0.216f, 0.220f, 0.223f, 0.227f, 0.231f, 0.235f, 0.238f,
+    0.242f, 0.246f, 0.250f, 0.254f, 0.258f, 0.262f, 0.266f, 0.270f, 0.275f,
+    0.279f, 0.283f, 0.287f, 0.292f, 0.296f, 0.301f, 0.305f, 0.309f, 0.314f,
+    0.319f, 0.323f, 0.328f, 0.332f, 0.337f, 0.342f, 0.347f, 0.352f, 0.356f,
+    0.361f, 0.366f, 0.371f, 0.376f, 0.381f, 0.386f, 0.392f, 0.397f, 0.402f,
+    0.407f, 0.413f, 0.418f, 0.423f, 0.429f, 0.434f, 0.440f, 0.445f, 0.451f,
+    0.456f, 0.462f, 0.468f, 0.474f, 0.479f, 0.485f, 0.491f, 0.497f, 0.503f,
+    0.509f, 0.515f, 0.521f, 0.527f, 0.533f, 0.539f, 0.546f, 0.552f, 0.558f,
+    0.565f, 0.571f, 0.578f, 0.584f, 0.591f, 0.597f, 0.604f, 0.610f, 0.617f,
+    0.624f, 0.631f, 0.638f, 0.644f, 0.651f, 0.658f, 0.665f, 0.672f, 0.680f,
+    0.687f, 0.694f, 0.701f, 0.708f, 0.716f, 0.723f, 0.730f, 0.738f, 0.745f,
+    0.753f, 0.761f, 0.768f, 0.776f, 0.784f, 0.791f, 0.799f, 0.807f, 0.815f,
+    0.823f, 0.831f, 0.839f, 0.847f, 0.855f, 0.863f, 0.871f, 0.880f, 0.888f,
+    0.896f, 0.905f, 0.913f, 0.922f, 0.930f, 0.939f, 0.947f, 0.956f, 0.965f,
+    0.973f, 0.982f, 0.991f, 1.000f};
+
+namespace mozilla {
+namespace gfx {
+
+// Some convenience FilterNode creation functions.
+
+namespace FilterWrappers {
+
+static already_AddRefed<FilterNode> Unpremultiply(DrawTarget* aDT,
+                                                  FilterNode* aInput) {
+  RefPtr<FilterNode> filter = aDT->CreateFilter(FilterType::UNPREMULTIPLY);
+  if (filter) {
+    filter->SetInput(IN_UNPREMULTIPLY_IN, aInput);
+    return filter.forget();
+  }
+  return nullptr;
+}
+
+static already_AddRefed<FilterNode> Premultiply(DrawTarget* aDT,
+                                                FilterNode* aInput) {
+  RefPtr<FilterNode> filter = aDT->CreateFilter(FilterType::PREMULTIPLY);
+  if (filter) {
+    filter->SetInput(IN_PREMULTIPLY_IN, aInput);
+    return filter.forget();
+  }
+  return nullptr;
+}
+
+static already_AddRefed<FilterNode> LinearRGBToSRGB(DrawTarget* aDT,
+                                                    FilterNode* aInput) {
+  RefPtr<FilterNode> transfer =
+      aDT->CreateFilter(FilterType::DISCRETE_TRANSFER);
+  if (transfer) {
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_R, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_R, glinearRGBTosRGBMap,
+                           256);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_G, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_G, glinearRGBTosRGBMap,
+                           256);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_B, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_B, glinearRGBTosRGBMap,
+                           256);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_A, true);
+    transfer->SetInput(IN_DISCRETE_TRANSFER_IN, aInput);
+    return transfer.forget();
+  }
+  return nullptr;
+}
+
+static already_AddRefed<FilterNode> SRGBToLinearRGB(DrawTarget* aDT,
+                                                    FilterNode* aInput) {
+  RefPtr<FilterNode> transfer =
+      aDT->CreateFilter(FilterType::DISCRETE_TRANSFER);
+  if (transfer) {
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_R, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_R, gsRGBToLinearRGBMap,
+                           256);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_G, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_G, gsRGBToLinearRGBMap,
+                           256);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_B, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_B, gsRGBToLinearRGBMap,
+                           256);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_A, true);
+    transfer->SetInput(IN_DISCRETE_TRANSFER_IN, aInput);
+    return transfer.forget();
+  }
+  return nullptr;
+}
+
+static already_AddRefed<FilterNode> Crop(DrawTarget* aDT,
+                                         FilterNode* aInputFilter,
+                                         const IntRect& aRect) {
+  RefPtr<FilterNode> filter = aDT->CreateFilter(FilterType::CROP);
+  if (filter) {
+    filter->SetAttribute(ATT_CROP_RECT, Rect(aRect));
+    filter->SetInput(IN_CROP_IN, aInputFilter);
+    return filter.forget();
+  }
+  return nullptr;
+}
+
+static already_AddRefed<FilterNode> Offset(DrawTarget* aDT,
+                                           FilterNode* aInputFilter,
+                                           const IntPoint& aOffset) {
+  RefPtr<FilterNode> filter = aDT->CreateFilter(FilterType::TRANSFORM);
+  if (filter) {
+    filter->SetAttribute(ATT_TRANSFORM_MATRIX,
+                         Matrix::Translation(aOffset.x, aOffset.y));
+    filter->SetInput(IN_TRANSFORM_IN, aInputFilter);
+    return filter.forget();
+  }
+  return nullptr;
+}
+
+static already_AddRefed<FilterNode> GaussianBlur(DrawTarget* aDT,
+                                                 FilterNode* aInputFilter,
+                                                 const Size& aStdDeviation) {
+  float stdX = float(std::min(aStdDeviation.width, kMaxStdDeviation));
+  float stdY = float(std::min(aStdDeviation.height, kMaxStdDeviation));
+  if (stdX == stdY) {
+    RefPtr<FilterNode> filter = aDT->CreateFilter(FilterType::GAUSSIAN_BLUR);
+    if (filter) {
+      filter->SetAttribute(ATT_GAUSSIAN_BLUR_STD_DEVIATION, stdX);
+      filter->SetInput(IN_GAUSSIAN_BLUR_IN, aInputFilter);
+      return filter.forget();
+    }
+    return nullptr;
+  }
+  RefPtr<FilterNode> filterH = aDT->CreateFilter(FilterType::DIRECTIONAL_BLUR);
+  RefPtr<FilterNode> filterV = aDT->CreateFilter(FilterType::DIRECTIONAL_BLUR);
+  if (filterH && filterV) {
+    filterH->SetAttribute(ATT_DIRECTIONAL_BLUR_DIRECTION,
+                          (uint32_t)BLUR_DIRECTION_X);
+    filterH->SetAttribute(ATT_DIRECTIONAL_BLUR_STD_DEVIATION, stdX);
+    filterV->SetAttribute(ATT_DIRECTIONAL_BLUR_DIRECTION,
+                          (uint32_t)BLUR_DIRECTION_Y);
+    filterV->SetAttribute(ATT_DIRECTIONAL_BLUR_STD_DEVIATION, stdY);
+    filterH->SetInput(IN_DIRECTIONAL_BLUR_IN, aInputFilter);
+    filterV->SetInput(IN_DIRECTIONAL_BLUR_IN, filterH);
+    return filterV.forget();
+  }
+  return nullptr;
+}
+
+already_AddRefed<FilterNode> Clear(DrawTarget* aDT) {
+  RefPtr<FilterNode> filter = aDT->CreateFilter(FilterType::FLOOD);
+  if (filter) {
+    filter->SetAttribute(ATT_FLOOD_COLOR, DeviceColor());
+    return filter.forget();
+  }
+  return nullptr;
+}
+
+already_AddRefed<FilterNode> ForSurface(DrawTarget* aDT,
+                                        SourceSurface* aSurface,
+                                        const IntPoint& aSurfacePosition) {
+  RefPtr<FilterNode> filter = aDT->CreateFilter(FilterType::TRANSFORM);
+  if (filter) {
+    filter->SetAttribute(
+        ATT_TRANSFORM_MATRIX,
+        Matrix::Translation(aSurfacePosition.x, aSurfacePosition.y));
+    filter->SetInput(IN_TRANSFORM_IN, aSurface);
+    return filter.forget();
+  }
+  return nullptr;
+}
+
+static already_AddRefed<FilterNode> ToAlpha(DrawTarget* aDT,
+                                            FilterNode* aInput) {
+  float zero = 0.0f;
+  RefPtr<FilterNode> transfer =
+      aDT->CreateFilter(FilterType::DISCRETE_TRANSFER);
+  if (transfer) {
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_R, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_R, &zero, 1);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_G, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_G, &zero, 1);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_B, false);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_TABLE_B, &zero, 1);
+    transfer->SetAttribute(ATT_DISCRETE_TRANSFER_DISABLE_A, true);
+    transfer->SetInput(IN_DISCRETE_TRANSFER_IN, aInput);
+    return transfer.forget();
+  }
+  return nullptr;
+}
+
+}  // namespace FilterWrappers
+
+// A class that wraps a FilterNode and handles conversion between different
+// color models. Create FilterCachedColorModels with your original filter and
+// the color model that this filter outputs in natively, and then call
+// ->ForColorModel(colorModel) in order to get a FilterNode which outputs to
+// the specified colorModel.
+// Internally, this is achieved by wrapping the original FilterNode with
+// conversion FilterNodes. These filter nodes are cached in such a way that no
+// repeated or back-and-forth conversions happen.
+class FilterCachedColorModels {
+ public:
+  NS_INLINE_DECL_REFCOUNTING(FilterCachedColorModels)
+  // aFilter can be null. In that case, ForColorModel will return a non-null
+  // completely transparent filter for all color models.
+  FilterCachedColorModels(DrawTarget* aDT, FilterNode* aFilter,
+                          ColorModel aOriginalColorModel);
+
+  // Get a FilterNode for the specified color model, guaranteed to be non-null.
+  already_AddRefed<FilterNode> ForColorModel(ColorModel aColorModel);
+
+  AlphaModel OriginalAlphaModel() const {
+    return mOriginalColorModel.mAlphaModel;
+  }
+
+ private:
+  // Create the required FilterNode that will be cached by ForColorModel.
+  already_AddRefed<FilterNode> WrapForColorModel(ColorModel aColorModel);
+
+  RefPtr<DrawTarget> mDT;
+  ColorModel mOriginalColorModel;
+
+  // This array is indexed by ColorModel::ToIndex.
+  RefPtr<FilterNode> mFilterForColorModel[4];
+
+  ~FilterCachedColorModels() = default;
+};
+
+FilterCachedColorModels::FilterCachedColorModels(DrawTarget* aDT,
+                                                 FilterNode* aFilter,
+                                                 ColorModel aOriginalColorModel)
+    : mDT(aDT), mOriginalColorModel(aOriginalColorModel) {
+  if (aFilter) {
+    mFilterForColorModel[aOriginalColorModel.ToIndex()] = aFilter;
+  } else {
+    RefPtr<FilterNode> clear = FilterWrappers::Clear(aDT);
+    mFilterForColorModel[0] = clear;
+    mFilterForColorModel[1] = clear;
+    mFilterForColorModel[2] = clear;
+    mFilterForColorModel[3] = clear;
+  }
+}
+
+already_AddRefed<FilterNode> FilterCachedColorModels::ForColorModel(
+    ColorModel aColorModel) {
+  if (aColorModel == mOriginalColorModel) {
+    // Make sure to not call WrapForColorModel if our original filter node was
+    // null, because then we'd get an infinite recursion.
+    RefPtr<FilterNode> filter =
+        mFilterForColorModel[mOriginalColorModel.ToIndex()];
+    return filter.forget();
+  }
+
+  if (!mFilterForColorModel[aColorModel.ToIndex()]) {
+    mFilterForColorModel[aColorModel.ToIndex()] =
+        WrapForColorModel(aColorModel);
+  }
+  RefPtr<FilterNode> filter(mFilterForColorModel[aColorModel.ToIndex()]);
+  return filter.forget();
+}
+
+already_AddRefed<FilterNode> FilterCachedColorModels::WrapForColorModel(
+    ColorModel aColorModel) {
+  // Convert one aspect at a time and recurse.
+  // Conversions between premultiplied / unpremultiplied color channels for the
+  // same color space can happen directly.
+  // Conversions between different color spaces can only happen on
+  // unpremultiplied color channels.
+
+  if (aColorModel.mAlphaModel == AlphaModel::Premultiplied) {
+    RefPtr<FilterNode> unpre = ForColorModel(
+        ColorModel(aColorModel.mColorSpace, AlphaModel::Unpremultiplied));
+    return FilterWrappers::Premultiply(mDT, unpre);
+  }
+
+  MOZ_ASSERT(aColorModel.mAlphaModel == AlphaModel::Unpremultiplied);
+  if (aColorModel.mColorSpace == mOriginalColorModel.mColorSpace) {
+    RefPtr<FilterNode> premultiplied = ForColorModel(
+        ColorModel(aColorModel.mColorSpace, AlphaModel::Premultiplied));
+    return FilterWrappers::Unpremultiply(mDT, premultiplied);
+  }
+
+  RefPtr<FilterNode> unpremultipliedOriginal = ForColorModel(
+      ColorModel(mOriginalColorModel.mColorSpace, AlphaModel::Unpremultiplied));
+  if (aColorModel.mColorSpace == ColorSpace::LinearRGB) {
+    return FilterWrappers::SRGBToLinearRGB(mDT, unpremultipliedOriginal);
+  }
+  return FilterWrappers::LinearRGBToSRGB(mDT, unpremultipliedOriginal);
+}
+
+static const float identityMatrix[] = {1, 0, 0, 0, 0, 0, 1, 0, 0, 0,
+                                       0, 0, 1, 0, 0, 0, 0, 0, 1, 0};
+
+// When aAmount == 0, the identity matrix is returned.
+// When aAmount == 1, aToMatrix is returned.
+// When aAmount > 1, an exaggerated version of aToMatrix is returned. This can
+// be useful in certain cases, such as producing a color matrix to oversaturate
+// an image.
+//
+// This function is a shortcut of a full matrix addition and a scalar multiply,
+// and it assumes that the following elements in aToMatrix are 0 and 1:
+//   x x x 0 0
+//   x x x 0 0
+//   x x x 0 0
+//   0 0 0 1 0
+static void InterpolateFromIdentityMatrix(const float aToMatrix[20],
+                                          float aAmount, float aOutMatrix[20]) {
+  PodCopy(aOutMatrix, identityMatrix, 20);
+
+  float oneMinusAmount = 1 - aAmount;
+
+  aOutMatrix[0] = aAmount * aToMatrix[0] + oneMinusAmount;
+  aOutMatrix[1] = aAmount * aToMatrix[1];
+  aOutMatrix[2] = aAmount * aToMatrix[2];
+
+  aOutMatrix[5] = aAmount * aToMatrix[5];
+  aOutMatrix[6] = aAmount * aToMatrix[6] + oneMinusAmount;
+  aOutMatrix[7] = aAmount * aToMatrix[7];
+
+  aOutMatrix[10] = aAmount * aToMatrix[10];
+  aOutMatrix[11] = aAmount * aToMatrix[11];
+  aOutMatrix[12] = aAmount * aToMatrix[12] + oneMinusAmount;
+}
+
+// Create a 4x5 color matrix for the different ways to specify color matrices
+// in SVG.
+bool ComputeColorMatrix(const ColorMatrixAttributes& aMatrixAttributes,
+                        float aOutMatrix[20]) {
+  // Luminance coefficients.
+  static const float lumR = 0.2126f;
+  static const float lumG = 0.7152f;
+  static const float lumB = 0.0722f;
+
+  static const float oneMinusLumR = 1 - lumR;
+  static const float oneMinusLumG = 1 - lumG;
+  static const float oneMinusLumB = 1 - lumB;
+
+  static const float luminanceToAlphaMatrix[] = {
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, lumR, lumG, lumB, 0, 0};
+
+  static const float saturateMatrix[] = {
+      lumR, lumG, lumB, 0, 0, lumR, lumG, lumB, 0, 0,
+      lumR, lumG, lumB, 0, 0, 0,    0,    0,    1, 0};
+
+  static const float sepiaMatrix[] = {
+      0.393f, 0.769f, 0.189f, 0, 0, 0.349f, 0.686f, 0.168f, 0, 0,
+      0.272f, 0.534f, 0.131f, 0, 0, 0,      0,      0,      1, 0};
+
+  // Hue rotate specific coefficients.
+  static const float hueRotateR = 0.143f;
+  static const float hueRotateG = 0.140f;
+  static const float hueRotateB = 0.283f;
+
+  switch (aMatrixAttributes.mType) {
+    case SVG_FECOLORMATRIX_TYPE_MATRIX: {
+      if (aMatrixAttributes.mValues.Length() != 20) {
+        return false;
+      }
+
+      PodCopy(aOutMatrix, aMatrixAttributes.mValues.Elements(), 20);
+      break;
+    }
+
+    case SVG_FECOLORMATRIX_TYPE_SATURATE: {
+      if (aMatrixAttributes.mValues.Length() != 1) {
+        return false;
+      }
+
+      float s = aMatrixAttributes.mValues[0];
+
+      if (s < 0) {
+        return false;
+      }
+
+      InterpolateFromIdentityMatrix(saturateMatrix, 1 - s, aOutMatrix);
+      break;
+    }
+
+    case SVG_FECOLORMATRIX_TYPE_HUE_ROTATE: {
+      if (aMatrixAttributes.mValues.Length() != 1) {
+        return false;
+      }
+
+      PodCopy(aOutMatrix, identityMatrix, 20);
+
+      float hueRotateValue = aMatrixAttributes.mValues[0];
+
+      float c = static_cast<float>(cos(hueRotateValue * M_PI / 180));
+      float s = static_cast<float>(sin(hueRotateValue * M_PI / 180));
+
+      aOutMatrix[0] = lumR + oneMinusLumR * c - lumR * s;
+      aOutMatrix[1] = lumG - lumG * c - lumG * s;
+      aOutMatrix[2] = lumB - lumB * c + oneMinusLumB * s;
+
+      aOutMatrix[5] = lumR - lumR * c + hueRotateR * s;
+      aOutMatrix[6] = lumG + oneMinusLumG * c + hueRotateG * s;
+      aOutMatrix[7] = lumB - lumB * c - hueRotateB * s;
+
+      aOutMatrix[10] = lumR - lumR * c - oneMinusLumR * s;
+      aOutMatrix[11] = lumG - lumG * c + lumG * s;
+      aOutMatrix[12] = lumB + oneMinusLumB * c + lumB * s;
+
+      break;
+    }
+
+    case SVG_FECOLORMATRIX_TYPE_LUMINANCE_TO_ALPHA: {
+      PodCopy(aOutMatrix, luminanceToAlphaMatrix, 20);
+      break;
+    }
+
+    case SVG_FECOLORMATRIX_TYPE_SEPIA: {
+      if (aMatrixAttributes.mValues.Length() != 1) {
+        return false;
+      }
+
+      float amount = aMatrixAttributes.mValues[0];
+
+      if (amount < 0 || amount > 1) {
+        return false;
+      }
+
+      InterpolateFromIdentityMatrix(sepiaMatrix, amount, aOutMatrix);
+      break;
+    }
+
+    default: {
+      return false;
+    }
+  }
+
+  return !ArrayEqual(aOutMatrix, identityMatrix, 20);
+}
+
+static void DisableAllTransfers(FilterNode* aTransferFilterNode) {
+  aTransferFilterNode->SetAttribute(ATT_TRANSFER_DISABLE_R, true);
+  aTransferFilterNode->SetAttribute(ATT_TRANSFER_DISABLE_G, true);
+  aTransferFilterNode->SetAttribute(ATT_TRANSFER_DISABLE_B, true);
+  aTransferFilterNode->SetAttribute(ATT_TRANSFER_DISABLE_A, true);
+}
+
+// Called for one channel at a time.
+// This function creates the required FilterNodes on demand and tries to
+// merge conversions of different channels into the same FilterNode if
+// possible.
+// There's a mismatch between the way SVG and the Moz2D API handle transfer
+// functions: In SVG, it's possible to specify a different transfer function
+// type for each color channel, but in Moz2D, a given transfer function type
+// applies to all color channels.
+//
+//  @param aFunctionAttributes The attributes of the transfer function for this
+//                             channel.
+//  @param aChannel The color channel that this function applies to, where
+//                  0 = red, 1 = green, 2 = blue, 3 = alpha
+//  @param aDT The DrawTarget that the FilterNodes should be created for.
+//  @param aTableTransfer Existing FilterNode holders (which may still be
+//                        null) that the resulting FilterNodes from this
+//                        function will be stored in.
+//
+static void ConvertComponentTransferFunctionToFilter(
+    const ComponentTransferAttributes& aFunctionAttributes, int32_t aInChannel,
+    int32_t aOutChannel, DrawTarget* aDT, RefPtr<FilterNode>& aTableTransfer,
+    RefPtr<FilterNode>& aDiscreteTransfer, RefPtr<FilterNode>& aLinearTransfer,
+    RefPtr<FilterNode>& aGammaTransfer) {
+  static const TransferAtts disableAtt[4] = {
+      ATT_TRANSFER_DISABLE_R, ATT_TRANSFER_DISABLE_G, ATT_TRANSFER_DISABLE_B,
+      ATT_TRANSFER_DISABLE_A};
+
+  RefPtr<FilterNode> filter;
+
+  uint32_t type = aFunctionAttributes.mTypes[aInChannel];
+
+  switch (type) {
+    case SVG_FECOMPONENTTRANSFER_TYPE_TABLE: {
+      const nsTArray<float>& tableValues =
+          aFunctionAttributes.mValues[aInChannel];
+      if (tableValues.Length() < 2) return;
+
+      if (!aTableTransfer) {
+        aTableTransfer = aDT->CreateFilter(FilterType::TABLE_TRANSFER);
+        if (!aTableTransfer) {
+          return;
+        }
+        DisableAllTransfers(aTableTransfer);
+      }
+      filter = aTableTransfer;
+      static const TableTransferAtts tableAtt[4] = {
+          ATT_TABLE_TRANSFER_TABLE_R, ATT_TABLE_TRANSFER_TABLE_G,
+          ATT_TABLE_TRANSFER_TABLE_B, ATT_TABLE_TRANSFER_TABLE_A};
+      filter->SetAttribute(disableAtt[aOutChannel], false);
+      filter->SetAttribute(tableAtt[aOutChannel], &tableValues[0],
+                           tableValues.Length());
+      break;
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: {
+      const nsTArray<float>& tableValues =
+          aFunctionAttributes.mValues[aInChannel];
+      if (tableValues.Length() < 1) return;
+
+      if (!aDiscreteTransfer) {
+        aDiscreteTransfer = aDT->CreateFilter(FilterType::DISCRETE_TRANSFER);
+        if (!aDiscreteTransfer) {
+          return;
+        }
+        DisableAllTransfers(aDiscreteTransfer);
+      }
+      filter = aDiscreteTransfer;
+      static const DiscreteTransferAtts tableAtt[4] = {
+          ATT_DISCRETE_TRANSFER_TABLE_R, ATT_DISCRETE_TRANSFER_TABLE_G,
+          ATT_DISCRETE_TRANSFER_TABLE_B, ATT_DISCRETE_TRANSFER_TABLE_A};
+      filter->SetAttribute(disableAtt[aOutChannel], false);
+      filter->SetAttribute(tableAtt[aOutChannel], &tableValues[0],
+                           tableValues.Length());
+
+      break;
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: {
+      static const LinearTransferAtts slopeAtt[4] = {
+          ATT_LINEAR_TRANSFER_SLOPE_R, ATT_LINEAR_TRANSFER_SLOPE_G,
+          ATT_LINEAR_TRANSFER_SLOPE_B, ATT_LINEAR_TRANSFER_SLOPE_A};
+      static const LinearTransferAtts interceptAtt[4] = {
+          ATT_LINEAR_TRANSFER_INTERCEPT_R, ATT_LINEAR_TRANSFER_INTERCEPT_G,
+          ATT_LINEAR_TRANSFER_INTERCEPT_B, ATT_LINEAR_TRANSFER_INTERCEPT_A};
+      if (!aLinearTransfer) {
+        aLinearTransfer = aDT->CreateFilter(FilterType::LINEAR_TRANSFER);
+        if (!aLinearTransfer) {
+          return;
+        }
+        DisableAllTransfers(aLinearTransfer);
+      }
+      filter = aLinearTransfer;
+      filter->SetAttribute(disableAtt[aOutChannel], false);
+      const nsTArray<float>& slopeIntercept =
+          aFunctionAttributes.mValues[aInChannel];
+      float slope = slopeIntercept[kComponentTransferSlopeIndex];
+      float intercept = slopeIntercept[kComponentTransferInterceptIndex];
+      filter->SetAttribute(slopeAtt[aOutChannel], slope);
+      filter->SetAttribute(interceptAtt[aOutChannel], intercept);
+      break;
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: {
+      static const GammaTransferAtts amplitudeAtt[4] = {
+          ATT_GAMMA_TRANSFER_AMPLITUDE_R, ATT_GAMMA_TRANSFER_AMPLITUDE_G,
+          ATT_GAMMA_TRANSFER_AMPLITUDE_B, ATT_GAMMA_TRANSFER_AMPLITUDE_A};
+      static const GammaTransferAtts exponentAtt[4] = {
+          ATT_GAMMA_TRANSFER_EXPONENT_R, ATT_GAMMA_TRANSFER_EXPONENT_G,
+          ATT_GAMMA_TRANSFER_EXPONENT_B, ATT_GAMMA_TRANSFER_EXPONENT_A};
+      static const GammaTransferAtts offsetAtt[4] = {
+          ATT_GAMMA_TRANSFER_OFFSET_R, ATT_GAMMA_TRANSFER_OFFSET_G,
+          ATT_GAMMA_TRANSFER_OFFSET_B, ATT_GAMMA_TRANSFER_OFFSET_A};
+      if (!aGammaTransfer) {
+        aGammaTransfer = aDT->CreateFilter(FilterType::GAMMA_TRANSFER);
+        if (!aGammaTransfer) {
+          return;
+        }
+        DisableAllTransfers(aGammaTransfer);
+      }
+      filter = aGammaTransfer;
+      filter->SetAttribute(disableAtt[aOutChannel], false);
+      const nsTArray<float>& gammaValues =
+          aFunctionAttributes.mValues[aInChannel];
+      float amplitude = gammaValues[kComponentTransferAmplitudeIndex];
+      float exponent = gammaValues[kComponentTransferExponentIndex];
+      float offset = gammaValues[kComponentTransferOffsetIndex];
+      filter->SetAttribute(amplitudeAtt[aOutChannel], amplitude);
+      filter->SetAttribute(exponentAtt[aOutChannel], exponent);
+      filter->SetAttribute(offsetAtt[aOutChannel], offset);
+      break;
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY:
+    default:
+      break;
+  }
+}
+
+const int32_t kMorphologyMaxRadius = 100000;
+
+// Handle the different primitive description types and create the necessary
+// FilterNode(s) for each.
+// Returns nullptr for invalid filter primitives. This should be interpreted as
+// transparent black by the caller.
+// aSourceRegions contains the filter primitive subregions of the source
+// primitives; only needed for eTile primitives.
+// aInputImages carries additional surfaces that are used by eImage primitives.
+static already_AddRefed<FilterNode> FilterNodeFromPrimitiveDescription(
+    const FilterPrimitiveDescription& aDescription, DrawTarget* aDT,
+    nsTArray<RefPtr<FilterNode>>& aSources, nsTArray<IntRect>& aSourceRegions,
+    nsTArray<RefPtr<SourceSurface>>& aInputImages) {
+  struct PrimitiveAttributesMatcher {
+    PrimitiveAttributesMatcher(const FilterPrimitiveDescription& aDescription,
+                               DrawTarget* aDT,
+                               nsTArray<RefPtr<FilterNode>>& aSources,
+                               nsTArray<IntRect>& aSourceRegions,
+                               nsTArray<RefPtr<SourceSurface>>& aInputImages)
+        : mDescription(aDescription),
+          mDT(aDT),
+          mSources(aSources),
+          mSourceRegions(aSourceRegions),
+          mInputImages(aInputImages) {}
+
+    const FilterPrimitiveDescription& mDescription;
+    DrawTarget* mDT;
+    nsTArray<RefPtr<FilterNode>>& mSources;
+    nsTArray<IntRect>& mSourceRegions;
+    nsTArray<RefPtr<SourceSurface>>& mInputImages;
+
+    already_AddRefed<FilterNode> operator()(
+        const EmptyAttributes& aEmptyAttributes) {
+      return nullptr;
+    }
+
+    already_AddRefed<FilterNode> operator()(const BlendAttributes& aBlend) {
+      uint32_t mode = aBlend.mBlendMode;
+      RefPtr<FilterNode> filter;
+      if (mode == SVG_FEBLEND_MODE_UNKNOWN) {
+        return nullptr;
+      }
+      if (mode == SVG_FEBLEND_MODE_NORMAL) {
+        filter = mDT->CreateFilter(FilterType::COMPOSITE);
+        if (!filter) {
+          return nullptr;
+        }
+        filter->SetInput(IN_COMPOSITE_IN_START, mSources[1]);
+        filter->SetInput(IN_COMPOSITE_IN_START + 1, mSources[0]);
+      } else {
+        filter = mDT->CreateFilter(FilterType::BLEND);
+        if (!filter) {
+          return nullptr;
+        }
+        static const uint8_t blendModes[SVG_FEBLEND_MODE_LUMINOSITY + 1] = {
+            0,
+            0,
+            BLEND_MODE_MULTIPLY,
+            BLEND_MODE_SCREEN,
+            BLEND_MODE_DARKEN,
+            BLEND_MODE_LIGHTEN,
+            BLEND_MODE_OVERLAY,
+            BLEND_MODE_COLOR_DODGE,
+            BLEND_MODE_COLOR_BURN,
+            BLEND_MODE_HARD_LIGHT,
+            BLEND_MODE_SOFT_LIGHT,
+            BLEND_MODE_DIFFERENCE,
+            BLEND_MODE_EXCLUSION,
+            BLEND_MODE_HUE,
+            BLEND_MODE_SATURATION,
+            BLEND_MODE_COLOR,
+            BLEND_MODE_LUMINOSITY};
+        filter->SetAttribute(ATT_BLEND_BLENDMODE, (uint32_t)blendModes[mode]);
+        // The correct input order for both software and D2D filters is flipped
+        // from our source order, so flip here.
+        filter->SetInput(IN_BLEND_IN, mSources[1]);
+        filter->SetInput(IN_BLEND_IN2, mSources[0]);
+      }
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const ColorMatrixAttributes& aMatrixAttributes) {
+      float colorMatrix[20];
+      if (!ComputeColorMatrix(aMatrixAttributes, colorMatrix)) {
+        RefPtr<FilterNode> filter(mSources[0]);
+        return filter.forget();
+      }
+
+      Matrix5x4 matrix(
+          colorMatrix[0], colorMatrix[5], colorMatrix[10], colorMatrix[15],
+          colorMatrix[1], colorMatrix[6], colorMatrix[11], colorMatrix[16],
+          colorMatrix[2], colorMatrix[7], colorMatrix[12], colorMatrix[17],
+          colorMatrix[3], colorMatrix[8], colorMatrix[13], colorMatrix[18],
+          colorMatrix[4], colorMatrix[9], colorMatrix[14], colorMatrix[19]);
+
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::COLOR_MATRIX);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_COLOR_MATRIX_MATRIX, matrix);
+      filter->SetAttribute(ATT_COLOR_MATRIX_ALPHA_MODE,
+                           (uint32_t)ALPHA_MODE_STRAIGHT);
+      filter->SetInput(IN_COLOR_MATRIX_IN, mSources[0]);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const MorphologyAttributes& aMorphology) {
+      Size radii = aMorphology.mRadii;
+      int32_t rx = radii.width;
+      int32_t ry = radii.height;
+
+      // Is one of the radii zero or negative, return the input image
+      if (rx <= 0 || ry <= 0) {
+        RefPtr<FilterNode> filter(mSources[0]);
+        return filter.forget();
+      }
+
+      // Clamp radii to prevent completely insane values:
+      rx = std::min(rx, kMorphologyMaxRadius);
+      ry = std::min(ry, kMorphologyMaxRadius);
+
+      MorphologyOperator op = aMorphology.mOperator == SVG_OPERATOR_ERODE
+                                  ? MORPHOLOGY_OPERATOR_ERODE
+                                  : MORPHOLOGY_OPERATOR_DILATE;
+
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::MORPHOLOGY);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_MORPHOLOGY_RADII, IntSize(rx, ry));
+      filter->SetAttribute(ATT_MORPHOLOGY_OPERATOR, (uint32_t)op);
+      filter->SetInput(IN_MORPHOLOGY_IN, mSources[0]);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(const FloodAttributes& aFlood) {
+      DeviceColor color = ToDeviceColor(aFlood.mColor);
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::FLOOD);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_FLOOD_COLOR, color);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(const TileAttributes& aTile) {
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::TILE);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_TILE_SOURCE_RECT, mSourceRegions[0]);
+      filter->SetInput(IN_TILE_IN, mSources[0]);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const ComponentTransferAttributes& aComponentTransfer) {
+      MOZ_ASSERT(aComponentTransfer.mTypes[0] !=
+                 SVG_FECOMPONENTTRANSFER_SAME_AS_R);
+      MOZ_ASSERT(aComponentTransfer.mTypes[3] !=
+                 SVG_FECOMPONENTTRANSFER_SAME_AS_R);
+
+      RefPtr<FilterNode> filters[4];  // one for each FILTER_*_TRANSFER type
+      for (int32_t i = 0; i < 4; i++) {
+        int32_t inputIndex = (aComponentTransfer.mTypes[i] ==
+                              SVG_FECOMPONENTTRANSFER_SAME_AS_R) &&
+                                     (i < 3)
+                                 ? 0
+                                 : i;
+        ConvertComponentTransferFunctionToFilter(aComponentTransfer, inputIndex,
+                                                 i, mDT, filters[0], filters[1],
+                                                 filters[2], filters[3]);
+      }
+
+      // Connect all used filters nodes.
+      RefPtr<FilterNode> lastFilter = mSources[0];
+      for (int32_t i = 0; i < 4; i++) {
+        if (filters[i]) {
+          filters[i]->SetInput(0, lastFilter);
+          lastFilter = filters[i];
+        }
+      }
+
+      return lastFilter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(const OpacityAttributes& aOpacity) {
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::OPACITY);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_OPACITY_VALUE, aOpacity.mOpacity);
+      filter->SetInput(IN_OPACITY_IN, mSources[0]);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const ConvolveMatrixAttributes& aConvolveMatrix) {
+      RefPtr<FilterNode> filter =
+          mDT->CreateFilter(FilterType::CONVOLVE_MATRIX);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_KERNEL_SIZE,
+                           aConvolveMatrix.mKernelSize);
+      const nsTArray<float>& matrix = aConvolveMatrix.mKernelMatrix;
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_KERNEL_MATRIX, matrix.Elements(),
+                           matrix.Length());
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_DIVISOR,
+                           aConvolveMatrix.mDivisor);
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_BIAS, aConvolveMatrix.mBias);
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_TARGET, aConvolveMatrix.mTarget);
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_SOURCE_RECT, mSourceRegions[0]);
+      uint32_t edgeMode = aConvolveMatrix.mEdgeMode;
+      static const uint8_t edgeModes[SVG_EDGEMODE_NONE + 1] = {
+          EDGE_MODE_NONE,       // SVG_EDGEMODE_UNKNOWN
+          EDGE_MODE_DUPLICATE,  // SVG_EDGEMODE_DUPLICATE
+          EDGE_MODE_WRAP,       // SVG_EDGEMODE_WRAP
+          EDGE_MODE_NONE        // SVG_EDGEMODE_NONE
+      };
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_EDGE_MODE,
+                           (uint32_t)edgeModes[edgeMode]);
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_KERNEL_UNIT_LENGTH,
+                           aConvolveMatrix.mKernelUnitLength);
+      filter->SetAttribute(ATT_CONVOLVE_MATRIX_PRESERVE_ALPHA,
+                           aConvolveMatrix.mPreserveAlpha);
+      filter->SetInput(IN_CONVOLVE_MATRIX_IN, mSources[0]);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(const OffsetAttributes& aOffset) {
+      return FilterWrappers::Offset(mDT, mSources[0], aOffset.mValue);
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const DisplacementMapAttributes& aDisplacementMap) {
+      RefPtr<FilterNode> filter =
+          mDT->CreateFilter(FilterType::DISPLACEMENT_MAP);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_DISPLACEMENT_MAP_SCALE, aDisplacementMap.mScale);
+      static const uint8_t channel[SVG_CHANNEL_A + 1] = {
+          COLOR_CHANNEL_R,  // SVG_CHANNEL_UNKNOWN
+          COLOR_CHANNEL_R,  // SVG_CHANNEL_R
+          COLOR_CHANNEL_G,  // SVG_CHANNEL_G
+          COLOR_CHANNEL_B,  // SVG_CHANNEL_B
+          COLOR_CHANNEL_A   // SVG_CHANNEL_A
+      };
+      filter->SetAttribute(ATT_DISPLACEMENT_MAP_X_CHANNEL,
+                           (uint32_t)channel[aDisplacementMap.mXChannel]);
+      filter->SetAttribute(ATT_DISPLACEMENT_MAP_Y_CHANNEL,
+                           (uint32_t)channel[aDisplacementMap.mYChannel]);
+      filter->SetInput(IN_DISPLACEMENT_MAP_IN, mSources[0]);
+      filter->SetInput(IN_DISPLACEMENT_MAP_IN2, mSources[1]);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const TurbulenceAttributes& aTurbulence) {
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::TURBULENCE);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_TURBULENCE_BASE_FREQUENCY,
+                           aTurbulence.mBaseFrequency);
+      filter->SetAttribute(ATT_TURBULENCE_NUM_OCTAVES, aTurbulence.mOctaves);
+      filter->SetAttribute(ATT_TURBULENCE_STITCHABLE, aTurbulence.mStitchable);
+      filter->SetAttribute(ATT_TURBULENCE_SEED, (uint32_t)aTurbulence.mSeed);
+      static const uint8_t type[SVG_TURBULENCE_TYPE_TURBULENCE + 1] = {
+          TURBULENCE_TYPE_FRACTAL_NOISE,  // SVG_TURBULENCE_TYPE_UNKNOWN
+          TURBULENCE_TYPE_FRACTAL_NOISE,  // SVG_TURBULENCE_TYPE_FRACTALNOISE
+          TURBULENCE_TYPE_TURBULENCE      // SVG_TURBULENCE_TYPE_TURBULENCE
+      };
+      filter->SetAttribute(ATT_TURBULENCE_TYPE,
+                           (uint32_t)type[aTurbulence.mType]);
+      filter->SetAttribute(
+          ATT_TURBULENCE_RECT,
+          mDescription.PrimitiveSubregion() - aTurbulence.mOffset);
+      return FilterWrappers::Offset(mDT, filter, aTurbulence.mOffset);
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const CompositeAttributes& aComposite) {
+      RefPtr<FilterNode> filter;
+      uint32_t op = aComposite.mOperator;
+      if (op == SVG_FECOMPOSITE_OPERATOR_ARITHMETIC) {
+        const nsTArray<float>& coefficients = aComposite.mCoefficients;
+        static const float allZero[4] = {0, 0, 0, 0};
+        filter = mDT->CreateFilter(FilterType::ARITHMETIC_COMBINE);
+        // All-zero coefficients sometimes occur in junk filters.
+        if (!filter || (coefficients.Length() == ArrayLength(allZero) &&
+                        ArrayEqual(coefficients.Elements(), allZero,
+                                   ArrayLength(allZero)))) {
+          return nullptr;
+        }
+        filter->SetAttribute(ATT_ARITHMETIC_COMBINE_COEFFICIENTS,
+                             coefficients.Elements(), coefficients.Length());
+        filter->SetInput(IN_ARITHMETIC_COMBINE_IN, mSources[0]);
+        filter->SetInput(IN_ARITHMETIC_COMBINE_IN2, mSources[1]);
+      } else {
+        filter = mDT->CreateFilter(FilterType::COMPOSITE);
+        if (!filter) {
+          return nullptr;
+        }
+        static const uint8_t operators[SVG_FECOMPOSITE_OPERATOR_LIGHTER + 1] = {
+            COMPOSITE_OPERATOR_OVER,    // SVG_FECOMPOSITE_OPERATOR_UNKNOWN
+            COMPOSITE_OPERATOR_OVER,    // SVG_FECOMPOSITE_OPERATOR_OVER
+            COMPOSITE_OPERATOR_IN,      // SVG_FECOMPOSITE_OPERATOR_IN
+            COMPOSITE_OPERATOR_OUT,     // SVG_FECOMPOSITE_OPERATOR_OUT
+            COMPOSITE_OPERATOR_ATOP,    // SVG_FECOMPOSITE_OPERATOR_ATOP
+            COMPOSITE_OPERATOR_XOR,     // SVG_FECOMPOSITE_OPERATOR_XOR
+            COMPOSITE_OPERATOR_OVER,    // Unused, arithmetic is handled above
+            COMPOSITE_OPERATOR_LIGHTER  // SVG_FECOMPOSITE_OPERATOR_LIGHTER
+        };
+        filter->SetAttribute(ATT_COMPOSITE_OPERATOR, (uint32_t)operators[op]);
+        filter->SetInput(IN_COMPOSITE_IN_START, mSources[1]);
+        filter->SetInput(IN_COMPOSITE_IN_START + 1, mSources[0]);
+      }
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(const MergeAttributes& aMerge) {
+      if (mSources.Length() == 0) {
+        return nullptr;
+      }
+      if (mSources.Length() == 1) {
+        RefPtr<FilterNode> filter(mSources[0]);
+        return filter.forget();
+      }
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::COMPOSITE);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_COMPOSITE_OPERATOR,
+                           (uint32_t)COMPOSITE_OPERATOR_OVER);
+      for (size_t i = 0; i < mSources.Length(); i++) {
+        filter->SetInput(IN_COMPOSITE_IN_START + i, mSources[i]);
+      }
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const GaussianBlurAttributes& aGaussianBlur) {
+      return FilterWrappers::GaussianBlur(mDT, mSources[0],
+                                          aGaussianBlur.mStdDeviation);
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const DropShadowAttributes& aDropShadow) {
+      RefPtr<FilterNode> alpha = FilterWrappers::ToAlpha(mDT, mSources[0]);
+      RefPtr<FilterNode> blur =
+          FilterWrappers::GaussianBlur(mDT, alpha, aDropShadow.mStdDeviation);
+      RefPtr<FilterNode> offsetBlur = FilterWrappers::Offset(
+          mDT, blur, IntPoint::Truncate(aDropShadow.mOffset));
+      RefPtr<FilterNode> flood = mDT->CreateFilter(FilterType::FLOOD);
+      if (!flood) {
+        return nullptr;
+      }
+      sRGBColor color = aDropShadow.mColor;
+      if (mDescription.InputColorSpace(0) == ColorSpace::LinearRGB) {
+        color = sRGBColor(gsRGBToLinearRGBMap[uint8_t(color.r * 255)],
+                          gsRGBToLinearRGBMap[uint8_t(color.g * 255)],
+                          gsRGBToLinearRGBMap[uint8_t(color.b * 255)], color.a);
+      }
+      flood->SetAttribute(ATT_FLOOD_COLOR, ToDeviceColor(color));
+
+      RefPtr<FilterNode> composite = mDT->CreateFilter(FilterType::COMPOSITE);
+      if (!composite) {
+        return nullptr;
+      }
+      composite->SetAttribute(ATT_COMPOSITE_OPERATOR,
+                              (uint32_t)COMPOSITE_OPERATOR_IN);
+      composite->SetInput(IN_COMPOSITE_IN_START, offsetBlur);
+      composite->SetInput(IN_COMPOSITE_IN_START + 1, flood);
+
+      RefPtr<FilterNode> filter = mDT->CreateFilter(FilterType::COMPOSITE);
+      if (!filter) {
+        return nullptr;
+      }
+      filter->SetAttribute(ATT_COMPOSITE_OPERATOR,
+                           (uint32_t)COMPOSITE_OPERATOR_OVER);
+      filter->SetInput(IN_COMPOSITE_IN_START, composite);
+      filter->SetInput(IN_COMPOSITE_IN_START + 1, mSources[0]);
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const SpecularLightingAttributes& aLighting) {
+      return operator()(
+          *(static_cast<const DiffuseLightingAttributes*>(&aLighting)));
+    }
+
+    already_AddRefed<FilterNode> operator()(
+        const DiffuseLightingAttributes& aLighting) {
+      bool isSpecular =
+          mDescription.Attributes().is<SpecularLightingAttributes>();
+
+      if (aLighting.mLightType == LightType::None) {
+        return nullptr;
+      }
+
+      enum { POINT = 0, SPOT, DISTANT } lightType = POINT;
+
+      switch (aLighting.mLightType) {
+        case LightType::Point:
+          lightType = POINT;
+          break;
+        case LightType::Spot:
+          lightType = SPOT;
+          break;
+        case LightType::Distant:
+          lightType = DISTANT;
+          break;
+        default:
+          break;
+      }
+
+      static const FilterType filterType[2][DISTANT + 1] = {
+          {FilterType::POINT_DIFFUSE, FilterType::SPOT_DIFFUSE,
+           FilterType::DISTANT_DIFFUSE},
+          {FilterType::POINT_SPECULAR, FilterType::SPOT_SPECULAR,
+           FilterType::DISTANT_SPECULAR}};
+      RefPtr<FilterNode> filter =
+          mDT->CreateFilter(filterType[isSpecular][lightType]);
+      if (!filter) {
+        return nullptr;
+      }
+
+      filter->SetAttribute(ATT_LIGHTING_COLOR, ToDeviceColor(aLighting.mColor));
+      filter->SetAttribute(ATT_LIGHTING_SURFACE_SCALE, aLighting.mSurfaceScale);
+      filter->SetAttribute(ATT_LIGHTING_KERNEL_UNIT_LENGTH,
+                           aLighting.mKernelUnitLength);
+
+      if (isSpecular) {
+        filter->SetAttribute(ATT_SPECULAR_LIGHTING_SPECULAR_CONSTANT,
+                             aLighting.mLightingConstant);
+        filter->SetAttribute(ATT_SPECULAR_LIGHTING_SPECULAR_EXPONENT,
+                             aLighting.mSpecularExponent);
+      } else {
+        filter->SetAttribute(ATT_DIFFUSE_LIGHTING_DIFFUSE_CONSTANT,
+                             aLighting.mLightingConstant);
+      }
+
+      switch (lightType) {
+        case POINT: {
+          Point3D position(aLighting.mLightValues[kPointLightPositionXIndex],
+                           aLighting.mLightValues[kPointLightPositionYIndex],
+                           aLighting.mLightValues[kPointLightPositionZIndex]);
+          filter->SetAttribute(ATT_POINT_LIGHT_POSITION, position);
+          break;
+        }
+        case SPOT: {
+          Point3D position(aLighting.mLightValues[kSpotLightPositionXIndex],
+                           aLighting.mLightValues[kSpotLightPositionYIndex],
+                           aLighting.mLightValues[kSpotLightPositionZIndex]);
+          filter->SetAttribute(ATT_SPOT_LIGHT_POSITION, position);
+          Point3D pointsAt(aLighting.mLightValues[kSpotLightPointsAtXIndex],
+                           aLighting.mLightValues[kSpotLightPointsAtYIndex],
+                           aLighting.mLightValues[kSpotLightPointsAtZIndex]);
+          filter->SetAttribute(ATT_SPOT_LIGHT_POINTS_AT, pointsAt);
+          filter->SetAttribute(ATT_SPOT_LIGHT_FOCUS,
+                               aLighting.mLightValues[kSpotLightFocusIndex]);
+          filter->SetAttribute(
+              ATT_SPOT_LIGHT_LIMITING_CONE_ANGLE,
+              aLighting.mLightValues[kSpotLightLimitingConeAngleIndex]);
+          break;
+        }
+        case DISTANT: {
+          filter->SetAttribute(
+              ATT_DISTANT_LIGHT_AZIMUTH,
+              aLighting.mLightValues[kDistantLightAzimuthIndex]);
+          filter->SetAttribute(
+              ATT_DISTANT_LIGHT_ELEVATION,
+              aLighting.mLightValues[kDistantLightElevationIndex]);
+          break;
+        }
+      }
+
+      filter->SetInput(IN_LIGHTING_IN, mSources[0]);
+
+      return filter.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(const ImageAttributes& aImage) {
+      const Matrix& TM = aImage.mTransform;
+      if (!TM.Determinant()) {
+        return nullptr;
+      }
+
+      // Pull the image from the additional image list using the index that's
+      // stored in the primitive description.
+      RefPtr<SourceSurface> inputImage = mInputImages[aImage.mInputIndex];
+
+      RefPtr<FilterNode> transform = mDT->CreateFilter(FilterType::TRANSFORM);
+      if (!transform) {
+        return nullptr;
+      }
+      transform->SetInput(IN_TRANSFORM_IN, inputImage);
+      transform->SetAttribute(ATT_TRANSFORM_MATRIX, TM);
+      transform->SetAttribute(ATT_TRANSFORM_FILTER, aImage.mFilter);
+      return transform.forget();
+    }
+
+    already_AddRefed<FilterNode> operator()(const ToAlphaAttributes& aToAlpha) {
+      return FilterWrappers::ToAlpha(mDT, mSources[0]);
+    }
+  };
+
+  return aDescription.Attributes().match(PrimitiveAttributesMatcher(
+      aDescription, aDT, aSources, aSourceRegions, aInputImages));
+}
+
+template <typename T>
+static const T& ElementForIndex(int32_t aIndex,
+                                const nsTArray<T>& aPrimitiveElements,
+                                const T& aSourceGraphicElement,
+                                const T& aFillPaintElement,
+                                const T& aStrokePaintElement) {
+  switch (aIndex) {
+    case FilterPrimitiveDescription::kPrimitiveIndexSourceGraphic:
+    case FilterPrimitiveDescription::kPrimitiveIndexSourceAlpha:
+      return aSourceGraphicElement;
+    case FilterPrimitiveDescription::kPrimitiveIndexFillPaint:
+      return aFillPaintElement;
+    case FilterPrimitiveDescription::kPrimitiveIndexStrokePaint:
+      return aStrokePaintElement;
+    default:
+      MOZ_ASSERT(aIndex >= 0, "bad index");
+      return aPrimitiveElements[aIndex];
+  }
+}
+
+static AlphaModel InputAlphaModelForPrimitive(
+    const FilterPrimitiveDescription& aDescr, int32_t aInputIndex,
+    AlphaModel aOriginalAlphaModel) {
+  const PrimitiveAttributes& atts = aDescr.Attributes();
+  if (atts.is<TileAttributes>() || atts.is<OffsetAttributes>() ||
+      atts.is<ToAlphaAttributes>()) {
+    return aOriginalAlphaModel;
+  }
+  if (atts.is<ColorMatrixAttributes>() ||
+      atts.is<ComponentTransferAttributes>()) {
+    return AlphaModel::Unpremultiplied;
+  }
+  if (atts.is<DisplacementMapAttributes>()) {
+    return aInputIndex == 0 ? AlphaModel::Premultiplied
+                            : AlphaModel::Unpremultiplied;
+  }
+  if (atts.is<ConvolveMatrixAttributes>()) {
+    return atts.as<ConvolveMatrixAttributes>().mPreserveAlpha
+               ? AlphaModel::Unpremultiplied
+               : AlphaModel::Premultiplied;
+  }
+  return AlphaModel::Premultiplied;
+}
+
+static AlphaModel OutputAlphaModelForPrimitive(
+    const FilterPrimitiveDescription& aDescr,
+    const nsTArray<AlphaModel>& aInputAlphaModels) {
+  if (aInputAlphaModels.Length()) {
+    // For filters with inputs, the output is premultiplied if and only if the
+    // first input is premultiplied.
+    return InputAlphaModelForPrimitive(aDescr, 0, aInputAlphaModels[0]);
+  }
+
+  // All filters without inputs produce premultiplied alpha.
+  return AlphaModel::Premultiplied;
+}
+
+// Returns the output FilterNode, in premultiplied sRGB space.
+already_AddRefed<FilterNode> FilterNodeGraphFromDescription(
+    DrawTarget* aDT, const FilterDescription& aFilter,
+    const Rect& aResultNeededRect, FilterNode* aSourceGraphic,
+    const IntRect& aSourceGraphicRect, FilterNode* aFillPaint,
+    FilterNode* aStrokePaint,
+    nsTArray<RefPtr<SourceSurface>>& aAdditionalImages) {
+  const nsTArray<FilterPrimitiveDescription>& primitives = aFilter.mPrimitives;
+  MOZ_RELEASE_ASSERT(!primitives.IsEmpty());
+
+  RefPtr<FilterCachedColorModels> sourceFilters[4];
+  nsTArray<RefPtr<FilterCachedColorModels>> primitiveFilters;
+
+  for (size_t i = 0; i < primitives.Length(); ++i) {
+    const FilterPrimitiveDescription& descr = primitives[i];
+
+    nsTArray<RefPtr<FilterNode>> inputFilterNodes;
+    nsTArray<IntRect> inputSourceRects;
+    nsTArray<AlphaModel> inputAlphaModels;
+
+    for (size_t j = 0; j < descr.NumberOfInputs(); j++) {
+      int32_t inputIndex = descr.InputPrimitiveIndex(j);
+      if (inputIndex < 0) {
+        inputSourceRects.AppendElement(descr.FilterSpaceBounds());
+      } else {
+        inputSourceRects.AppendElement(
+            primitives[inputIndex].PrimitiveSubregion());
+      }
+
+      RefPtr<FilterCachedColorModels> inputFilter;
+      if (inputIndex >= 0) {
+        MOZ_ASSERT(inputIndex < (int64_t)primitiveFilters.Length(),
+                   "out-of-bounds input index!");
+        inputFilter = primitiveFilters[inputIndex];
+        MOZ_ASSERT(
+            inputFilter,
+            "Referred to input filter that comes after the current one?");
+      } else {
+        int32_t sourceIndex = -inputIndex - 1;
+        MOZ_ASSERT(sourceIndex >= 0, "invalid source index");
+        MOZ_ASSERT(sourceIndex < 4, "invalid source index");
+        inputFilter = sourceFilters[sourceIndex];
+        if (!inputFilter) {
+          RefPtr<FilterNode> sourceFilterNode;
+
+          nsTArray<FilterNode*> primitiveFilters;
+          RefPtr<FilterNode> filt =
+              ElementForIndex(inputIndex, primitiveFilters, aSourceGraphic,
+                              aFillPaint, aStrokePaint);
+          if (filt) {
+            sourceFilterNode = filt;
+
+            // Clip the original SourceGraphic to the first filter region if the
+            // surface isn't already sized appropriately.
+            if ((inputIndex ==
+                     FilterPrimitiveDescription::kPrimitiveIndexSourceGraphic ||
+                 inputIndex ==
+                     FilterPrimitiveDescription::kPrimitiveIndexSourceAlpha) &&
+                !descr.FilterSpaceBounds().Contains(aSourceGraphicRect)) {
+              sourceFilterNode = FilterWrappers::Crop(
+                  aDT, sourceFilterNode, descr.FilterSpaceBounds());
+            }
+
+            if (inputIndex ==
+                FilterPrimitiveDescription::kPrimitiveIndexSourceAlpha) {
+              sourceFilterNode = FilterWrappers::ToAlpha(aDT, sourceFilterNode);
+            }
+          }
+
+          inputFilter = new FilterCachedColorModels(aDT, sourceFilterNode,
+                                                    ColorModel::PremulSRGB());
+          sourceFilters[sourceIndex] = inputFilter;
+        }
+      }
+      MOZ_ASSERT(inputFilter);
+
+      AlphaModel inputAlphaModel = InputAlphaModelForPrimitive(
+          descr, j, inputFilter->OriginalAlphaModel());
+      inputAlphaModels.AppendElement(inputAlphaModel);
+      ColorModel inputColorModel(descr.InputColorSpace(j), inputAlphaModel);
+      inputFilterNodes.AppendElement(
+          inputFilter->ForColorModel(inputColorModel));
+    }
+
+    RefPtr<FilterNode> primitiveFilterNode = FilterNodeFromPrimitiveDescription(
+        descr, aDT, inputFilterNodes, inputSourceRects, aAdditionalImages);
+
+    if (primitiveFilterNode) {
+      primitiveFilterNode = FilterWrappers::Crop(aDT, primitiveFilterNode,
+                                                 descr.PrimitiveSubregion());
+    }
+
+    ColorModel outputColorModel(
+        descr.OutputColorSpace(),
+        OutputAlphaModelForPrimitive(descr, inputAlphaModels));
+    RefPtr<FilterCachedColorModels> primitiveFilter =
+        new FilterCachedColorModels(aDT, primitiveFilterNode, outputColorModel);
+
+    primitiveFilters.AppendElement(primitiveFilter);
+  }
+
+  MOZ_RELEASE_ASSERT(!primitiveFilters.IsEmpty());
+  return primitiveFilters.LastElement()->ForColorModel(
+      ColorModel::PremulSRGB());
+}
+
+// FilterSupport
+
+void FilterSupport::RenderFilterDescription(
+    DrawTarget* aDT, const FilterDescription& aFilter, const Rect& aRenderRect,
+    SourceSurface* aSourceGraphic, const IntRect& aSourceGraphicRect,
+    SourceSurface* aFillPaint, const IntRect& aFillPaintRect,
+    SourceSurface* aStrokePaint, const IntRect& aStrokePaintRect,
+    nsTArray<RefPtr<SourceSurface>>& aAdditionalImages, const Point& aDestPoint,
+    const DrawOptions& aOptions) {
+  RefPtr<FilterNode> sourceGraphic, fillPaint, strokePaint;
+  if (aSourceGraphic) {
+    sourceGraphic = FilterWrappers::ForSurface(aDT, aSourceGraphic,
+                                               aSourceGraphicRect.TopLeft());
+  }
+  if (aFillPaint) {
+    fillPaint =
+        FilterWrappers::ForSurface(aDT, aFillPaint, aFillPaintRect.TopLeft());
+  }
+  if (aStrokePaint) {
+    strokePaint = FilterWrappers::ForSurface(aDT, aStrokePaint,
+                                             aStrokePaintRect.TopLeft());
+  }
+  RefPtr<FilterNode> resultFilter = FilterNodeGraphFromDescription(
+      aDT, aFilter, aRenderRect, sourceGraphic, aSourceGraphicRect, fillPaint,
+      strokePaint, aAdditionalImages);
+  if (!resultFilter) {
+    gfxWarning() << "Filter is NULL.";
+    return;
+  }
+  aDT->DrawFilter(resultFilter, aRenderRect, aDestPoint, aOptions);
+}
+
+static nsIntRegion UnionOfRegions(const nsTArray<nsIntRegion>& aRegions) {
+  nsIntRegion result;
+  for (size_t i = 0; i < aRegions.Length(); i++) {
+    result.Or(result, aRegions[i]);
+  }
+  return result;
+}
+
+static int32_t InflateSizeForBlurStdDev(float aStdDev) {
+  double size =
+      std::min(aStdDev, kMaxStdDeviation) * (3 * sqrt(2 * M_PI) / 4) * 1.5;
+  return uint32_t(floor(size + 0.5));
+}
+
+static nsIntRegion ResultChangeRegionForPrimitive(
+    const FilterPrimitiveDescription& aDescription,
+    const nsTArray<nsIntRegion>& aInputChangeRegions) {
+  struct PrimitiveAttributesMatcher {
+    PrimitiveAttributesMatcher(const FilterPrimitiveDescription& aDescription,
+                               const nsTArray<nsIntRegion>& aInputChangeRegions)
+        : mDescription(aDescription),
+          mInputChangeRegions(aInputChangeRegions) {}
+
+    const FilterPrimitiveDescription& mDescription;
+    const nsTArray<nsIntRegion>& mInputChangeRegions;
+
+    nsIntRegion operator()(const EmptyAttributes& aEmptyAttributes) {
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const BlendAttributes& aBlend) {
+      return UnionOfRegions(mInputChangeRegions);
+    }
+
+    nsIntRegion operator()(const ColorMatrixAttributes& aColorMatrix) {
+      return mInputChangeRegions[0];
+    }
+
+    nsIntRegion operator()(const MorphologyAttributes& aMorphology) {
+      Size radii = aMorphology.mRadii;
+      int32_t rx = clamped(int32_t(ceil(radii.width)), 0, kMorphologyMaxRadius);
+      int32_t ry =
+          clamped(int32_t(ceil(radii.height)), 0, kMorphologyMaxRadius);
+      return mInputChangeRegions[0].Inflated(nsIntMargin(ry, rx, ry, rx));
+    }
+
+    nsIntRegion operator()(const FloodAttributes& aFlood) {
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const TileAttributes& aTile) {
+      return mDescription.PrimitiveSubregion();
+    }
+
+    nsIntRegion operator()(
+        const ComponentTransferAttributes& aComponentTransfer) {
+      return mInputChangeRegions[0];
+    }
+
+    nsIntRegion operator()(const OpacityAttributes& aOpacity) {
+      return UnionOfRegions(mInputChangeRegions);
+    }
+
+    nsIntRegion operator()(const ConvolveMatrixAttributes& aConvolveMatrix) {
+      if (aConvolveMatrix.mEdgeMode != EDGE_MODE_NONE) {
+        return mDescription.PrimitiveSubregion();
+      }
+      Size kernelUnitLength = aConvolveMatrix.mKernelUnitLength;
+      IntSize kernelSize = aConvolveMatrix.mKernelSize;
+      IntPoint target = aConvolveMatrix.mTarget;
+      nsIntMargin m(
+          static_cast<int32_t>(ceil(kernelUnitLength.width * (target.x))),
+          static_cast<int32_t>(ceil(kernelUnitLength.height * (target.y))),
+          static_cast<int32_t>(
+              ceil(kernelUnitLength.width * (kernelSize.width - target.x - 1))),
+          static_cast<int32_t>(ceil(kernelUnitLength.height *
+                                    (kernelSize.height - target.y - 1))));
+      return mInputChangeRegions[0].Inflated(m);
+    }
+
+    nsIntRegion operator()(const OffsetAttributes& aOffset) {
+      IntPoint offset = aOffset.mValue;
+      return mInputChangeRegions[0].MovedBy(offset.x, offset.y);
+    }
+
+    nsIntRegion operator()(const DisplacementMapAttributes& aDisplacementMap) {
+      int32_t scale = ceil(std::abs(aDisplacementMap.mScale));
+      return mInputChangeRegions[0].Inflated(
+          nsIntMargin(scale, scale, scale, scale));
+    }
+
+    nsIntRegion operator()(const TurbulenceAttributes& aTurbulence) {
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const CompositeAttributes& aComposite) {
+      return UnionOfRegions(mInputChangeRegions);
+    }
+
+    nsIntRegion operator()(const MergeAttributes& aMerge) {
+      return UnionOfRegions(mInputChangeRegions);
+    }
+
+    nsIntRegion operator()(const GaussianBlurAttributes& aGaussianBlur) {
+      const Size& stdDeviation = aGaussianBlur.mStdDeviation;
+      int32_t dx = InflateSizeForBlurStdDev(stdDeviation.width);
+      int32_t dy = InflateSizeForBlurStdDev(stdDeviation.height);
+      return mInputChangeRegions[0].Inflated(nsIntMargin(dy, dx, dy, dx));
+    }
+
+    nsIntRegion operator()(const DropShadowAttributes& aDropShadow) {
+      IntPoint offset = IntPoint::Truncate(aDropShadow.mOffset);
+      nsIntRegion offsetRegion =
+          mInputChangeRegions[0].MovedBy(offset.x, offset.y);
+      Size stdDeviation = aDropShadow.mStdDeviation;
+      int32_t dx = InflateSizeForBlurStdDev(stdDeviation.width);
+      int32_t dy = InflateSizeForBlurStdDev(stdDeviation.height);
+      nsIntRegion blurRegion =
+          offsetRegion.Inflated(nsIntMargin(dy, dx, dy, dx));
+      blurRegion.Or(blurRegion, mInputChangeRegions[0]);
+      return blurRegion;
+    }
+
+    nsIntRegion operator()(const SpecularLightingAttributes& aLighting) {
+      return operator()(
+          *(static_cast<const DiffuseLightingAttributes*>(&aLighting)));
+    }
+
+    nsIntRegion operator()(const DiffuseLightingAttributes& aLighting) {
+      Size kernelUnitLength = aLighting.mKernelUnitLength;
+      int32_t dx = ceil(kernelUnitLength.width);
+      int32_t dy = ceil(kernelUnitLength.height);
+      return mInputChangeRegions[0].Inflated(nsIntMargin(dy, dx, dy, dx));
+    }
+
+    nsIntRegion operator()(const ImageAttributes& aImage) {
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const ToAlphaAttributes& aToAlpha) {
+      return mInputChangeRegions[0];
+    }
+  };
+
+  return aDescription.Attributes().match(
+      PrimitiveAttributesMatcher(aDescription, aInputChangeRegions));
+}
+
+/* static */
+nsIntRegion FilterSupport::ComputeResultChangeRegion(
+    const FilterDescription& aFilter, const nsIntRegion& aSourceGraphicChange,
+    const nsIntRegion& aFillPaintChange,
+    const nsIntRegion& aStrokePaintChange) {
+  const nsTArray<FilterPrimitiveDescription>& primitives = aFilter.mPrimitives;
+  MOZ_RELEASE_ASSERT(!primitives.IsEmpty());
+
+  nsTArray<nsIntRegion> resultChangeRegions;
+
+  for (int32_t i = 0; i < int32_t(primitives.Length()); ++i) {
+    const FilterPrimitiveDescription& descr = primitives[i];
+
+    nsTArray<nsIntRegion> inputChangeRegions;
+    for (size_t j = 0; j < descr.NumberOfInputs(); j++) {
+      int32_t inputIndex = descr.InputPrimitiveIndex(j);
+      MOZ_ASSERT(inputIndex < i, "bad input index");
+      nsIntRegion inputChangeRegion =
+          ElementForIndex(inputIndex, resultChangeRegions, aSourceGraphicChange,
+                          aFillPaintChange, aStrokePaintChange);
+      inputChangeRegions.AppendElement(inputChangeRegion);
+    }
+    nsIntRegion changeRegion =
+        ResultChangeRegionForPrimitive(descr, inputChangeRegions);
+    changeRegion.And(changeRegion, descr.PrimitiveSubregion());
+    resultChangeRegions.AppendElement(changeRegion);
+  }
+
+  MOZ_RELEASE_ASSERT(!resultChangeRegions.IsEmpty());
+  return resultChangeRegions[resultChangeRegions.Length() - 1];
+}
+
+static float ResultOfZeroUnderTransferFunction(
+    const ComponentTransferAttributes& aFunctionAttributes, int32_t channel) {
+  switch (aFunctionAttributes.mTypes[channel]) {
+    case SVG_FECOMPONENTTRANSFER_TYPE_TABLE: {
+      const nsTArray<float>& tableValues = aFunctionAttributes.mValues[channel];
+      if (tableValues.Length() < 2) {
+        return 0.0f;
+      }
+      return tableValues[0];
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE: {
+      const nsTArray<float>& tableValues = aFunctionAttributes.mValues[channel];
+      if (tableValues.Length() < 1) {
+        return 0.0f;
+      }
+      return tableValues[0];
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_LINEAR: {
+      const nsTArray<float>& values = aFunctionAttributes.mValues[channel];
+      return values[kComponentTransferInterceptIndex];
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_GAMMA: {
+      const nsTArray<float>& values = aFunctionAttributes.mValues[channel];
+      return values[kComponentTransferOffsetIndex];
+    }
+
+    case SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY:
+    default:
+      return 0.0f;
+  }
+}
+
+nsIntRegion FilterSupport::PostFilterExtentsForPrimitive(
+    const FilterPrimitiveDescription& aDescription,
+    const nsTArray<nsIntRegion>& aInputExtents) {
+  struct PrimitiveAttributesMatcher {
+    PrimitiveAttributesMatcher(const FilterPrimitiveDescription& aDescription,
+                               const nsTArray<nsIntRegion>& aInputExtents)
+        : mDescription(aDescription), mInputExtents(aInputExtents) {}
+
+    const FilterPrimitiveDescription& mDescription;
+    const nsTArray<nsIntRegion>& mInputExtents;
+
+    nsIntRegion operator()(const EmptyAttributes& aEmptyAttributes) {
+      return IntRect();
+    }
+
+    nsIntRegion operator()(const BlendAttributes& aBlend) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const ColorMatrixAttributes& aColorMatrix) {
+      if (aColorMatrix.mType == (uint32_t)SVG_FECOLORMATRIX_TYPE_MATRIX) {
+        const nsTArray<float>& values = aColorMatrix.mValues;
+        if (values.Length() == 20 && values[19] > 0.0f) {
+          return mDescription.PrimitiveSubregion();
+        }
+      }
+      return mInputExtents[0];
+    }
+
+    nsIntRegion operator()(const MorphologyAttributes& aMorphology) {
+      uint32_t op = aMorphology.mOperator;
+      if (op == SVG_OPERATOR_ERODE) {
+        return mInputExtents[0];
+      }
+      Size radii = aMorphology.mRadii;
+      int32_t rx = clamped(int32_t(ceil(radii.width)), 0, kMorphologyMaxRadius);
+      int32_t ry =
+          clamped(int32_t(ceil(radii.height)), 0, kMorphologyMaxRadius);
+      return mInputExtents[0].Inflated(nsIntMargin(ry, rx, ry, rx));
+    }
+
+    nsIntRegion operator()(const FloodAttributes& aFlood) {
+      if (aFlood.mColor.a == 0.0f) {
+        return IntRect();
+      }
+      return mDescription.PrimitiveSubregion();
+    }
+
+    nsIntRegion operator()(const TileAttributes& aTile) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(
+        const ComponentTransferAttributes& aComponentTransfer) {
+      if (ResultOfZeroUnderTransferFunction(aComponentTransfer, kChannelA) >
+          0.0f) {
+        return mDescription.PrimitiveSubregion();
+      }
+      return mInputExtents[0];
+    }
+
+    nsIntRegion operator()(const OpacityAttributes& aOpacity) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const ConvolveMatrixAttributes& aConvolveMatrix) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const OffsetAttributes& aOffset) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const DisplacementMapAttributes& aDisplacementMap) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const TurbulenceAttributes& aTurbulence) {
+      return mDescription.PrimitiveSubregion();
+    }
+
+    nsIntRegion operator()(const CompositeAttributes& aComposite) {
+      uint32_t op = aComposite.mOperator;
+      if (op == SVG_FECOMPOSITE_OPERATOR_ARITHMETIC) {
+        // The arithmetic composite primitive can draw outside the bounding
+        // box of its source images.
+        const nsTArray<float>& coefficients = aComposite.mCoefficients;
+        MOZ_ASSERT(coefficients.Length() == 4);
+
+        // The calculation is:
+        // r = c[0] * in[0] * in[1] + c[1] * in[0] + c[2] * in[1] + c[3]
+        nsIntRegion region;
+        if (coefficients[0] > 0.0f) {
+          region = mInputExtents[0].Intersect(mInputExtents[1]);
+        }
+        if (coefficients[1] > 0.0f) {
+          region.Or(region, mInputExtents[0]);
+        }
+        if (coefficients[2] > 0.0f) {
+          region.Or(region, mInputExtents[1]);
+        }
+        if (coefficients[3] > 0.0f) {
+          region = mDescription.PrimitiveSubregion();
+        }
+        return region;
+      }
+      if (op == SVG_FECOMPOSITE_OPERATOR_IN) {
+        return mInputExtents[0].Intersect(mInputExtents[1]);
+      }
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const MergeAttributes& aMerge) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const GaussianBlurAttributes& aGaussianBlur) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const DropShadowAttributes& aDropShadow) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+
+    nsIntRegion operator()(const DiffuseLightingAttributes& aDiffuseLighting) {
+      return mDescription.PrimitiveSubregion();
+    }
+
+    nsIntRegion operator()(
+        const SpecularLightingAttributes& aSpecularLighting) {
+      return mDescription.PrimitiveSubregion();
+    }
+
+    nsIntRegion operator()(const ImageAttributes& aImage) {
+      return mDescription.PrimitiveSubregion();
+    }
+
+    nsIntRegion operator()(const ToAlphaAttributes& aToAlpha) {
+      return ResultChangeRegionForPrimitive(mDescription, mInputExtents);
+    }
+  };
+
+  return aDescription.Attributes().match(
+      PrimitiveAttributesMatcher(aDescription, aInputExtents));
+}
+
+/* static */
+nsIntRegion FilterSupport::ComputePostFilterExtents(
+    const FilterDescription& aFilter,
+    const nsIntRegion& aSourceGraphicExtents) {
+  const nsTArray<FilterPrimitiveDescription>& primitives = aFilter.mPrimitives;
+  MOZ_RELEASE_ASSERT(!primitives.IsEmpty());
+  nsTArray<nsIntRegion> postFilterExtents;
+
+  for (int32_t i = 0; i < int32_t(primitives.Length()); ++i) {
+    const FilterPrimitiveDescription& descr = primitives[i];
+    nsIntRegion filterSpace = descr.FilterSpaceBounds();
+
+    nsTArray<nsIntRegion> inputExtents;
+    for (size_t j = 0; j < descr.NumberOfInputs(); j++) {
+      int32_t inputIndex = descr.InputPrimitiveIndex(j);
+      MOZ_ASSERT(inputIndex < i, "bad input index");
+      nsIntRegion inputExtent =
+          ElementForIndex(inputIndex, postFilterExtents, aSourceGraphicExtents,
+                          filterSpace, filterSpace);
+      inputExtents.AppendElement(inputExtent);
+    }
+    nsIntRegion extent = PostFilterExtentsForPrimitive(descr, inputExtents);
+    extent.And(extent, descr.PrimitiveSubregion());
+    postFilterExtents.AppendElement(extent);
+  }
+
+  MOZ_RELEASE_ASSERT(!postFilterExtents.IsEmpty());
+  return postFilterExtents[postFilterExtents.Length() - 1];
+}
+
+static nsIntRegion SourceNeededRegionForPrimitive(
+    const FilterPrimitiveDescription& aDescription,
+    const nsIntRegion& aResultNeededRegion, int32_t aInputIndex) {
+  struct PrimitiveAttributesMatcher {
+    PrimitiveAttributesMatcher(const FilterPrimitiveDescription& aDescription,
+                               const nsIntRegion& aResultNeededRegion,
+                               int32_t aInputIndex)
+        : mDescription(aDescription),
+          mResultNeededRegion(aResultNeededRegion),
+          mInputIndex(aInputIndex) {}
+
+    const FilterPrimitiveDescription& mDescription;
+    const nsIntRegion& mResultNeededRegion;
+    const int32_t mInputIndex;
+
+    nsIntRegion operator()(const EmptyAttributes& aEmptyAttributes) {
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const BlendAttributes& aBlend) {
+      return mResultNeededRegion;
+    }
+
+    nsIntRegion operator()(const ColorMatrixAttributes& aColorMatrix) {
+      return mResultNeededRegion;
+    }
+
+    nsIntRegion operator()(const MorphologyAttributes& aMorphology) {
+      Size radii = aMorphology.mRadii;
+      int32_t rx = clamped(int32_t(ceil(radii.width)), 0, kMorphologyMaxRadius);
+      int32_t ry =
+          clamped(int32_t(ceil(radii.height)), 0, kMorphologyMaxRadius);
+      return mResultNeededRegion.Inflated(nsIntMargin(ry, rx, ry, rx));
+    }
+
+    nsIntRegion operator()(const FloodAttributes& aFlood) {
+      MOZ_CRASH("GFX: this shouldn't be called for filters without inputs");
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const TileAttributes& aTile) {
+      return IntRect(INT32_MIN / 2, INT32_MIN / 2, INT32_MAX, INT32_MAX);
+    }
+
+    nsIntRegion operator()(
+        const ComponentTransferAttributes& aComponentTransfer) {
+      return mResultNeededRegion;
+    }
+
+    nsIntRegion operator()(const OpacityAttributes& aOpacity) {
+      return mResultNeededRegion;
+    }
+
+    nsIntRegion operator()(const ConvolveMatrixAttributes& aConvolveMatrix) {
+      Size kernelUnitLength = aConvolveMatrix.mKernelUnitLength;
+      IntSize kernelSize = aConvolveMatrix.mKernelSize;
+      IntPoint target = aConvolveMatrix.mTarget;
+      nsIntMargin m(
+          static_cast<int32_t>(
+              ceil(kernelUnitLength.width * (kernelSize.width - target.x - 1))),
+          static_cast<int32_t>(ceil(kernelUnitLength.height *
+                                    (kernelSize.height - target.y - 1))),
+          static_cast<int32_t>(ceil(kernelUnitLength.width * (target.x))),
+          static_cast<int32_t>(ceil(kernelUnitLength.height * (target.y))));
+      return mResultNeededRegion.Inflated(m);
+    }
+
+    nsIntRegion operator()(const OffsetAttributes& aOffset) {
+      IntPoint offset = aOffset.mValue;
+      return mResultNeededRegion.MovedBy(-nsIntPoint(offset.x, offset.y));
+    }
+
+    nsIntRegion operator()(const DisplacementMapAttributes& aDisplacementMap) {
+      if (mInputIndex == 1) {
+        return mResultNeededRegion;
+      }
+      int32_t scale = ceil(std::abs(aDisplacementMap.mScale));
+      return mResultNeededRegion.Inflated(
+          nsIntMargin(scale, scale, scale, scale));
+    }
+
+    nsIntRegion operator()(const TurbulenceAttributes& aTurbulence) {
+      MOZ_CRASH("GFX: this shouldn't be called for filters without inputs");
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const CompositeAttributes& aComposite) {
+      return mResultNeededRegion;
+    }
+
+    nsIntRegion operator()(const MergeAttributes& aMerge) {
+      return mResultNeededRegion;
+    }
+
+    nsIntRegion operator()(const GaussianBlurAttributes& aGaussianBlur) {
+      const Size& stdDeviation = aGaussianBlur.mStdDeviation;
+      int32_t dx = InflateSizeForBlurStdDev(stdDeviation.width);
+      int32_t dy = InflateSizeForBlurStdDev(stdDeviation.height);
+      return mResultNeededRegion.Inflated(nsIntMargin(dy, dx, dy, dx));
+    }
+
+    nsIntRegion operator()(const DropShadowAttributes& aDropShadow) {
+      IntPoint offset = IntPoint::Truncate(aDropShadow.mOffset);
+      nsIntRegion offsetRegion =
+          mResultNeededRegion.MovedBy(-nsIntPoint(offset.x, offset.y));
+      Size stdDeviation = aDropShadow.mStdDeviation;
+      int32_t dx = InflateSizeForBlurStdDev(stdDeviation.width);
+      int32_t dy = InflateSizeForBlurStdDev(stdDeviation.height);
+      nsIntRegion blurRegion =
+          offsetRegion.Inflated(nsIntMargin(dy, dx, dy, dx));
+      blurRegion.Or(blurRegion, mResultNeededRegion);
+      return blurRegion;
+    }
+
+    nsIntRegion operator()(const SpecularLightingAttributes& aLighting) {
+      return operator()(
+          *(static_cast<const DiffuseLightingAttributes*>(&aLighting)));
+    }
+
+    nsIntRegion operator()(const DiffuseLightingAttributes& aLighting) {
+      Size kernelUnitLength = aLighting.mKernelUnitLength;
+      int32_t dx = ceil(kernelUnitLength.width);
+      int32_t dy = ceil(kernelUnitLength.height);
+      return mResultNeededRegion.Inflated(nsIntMargin(dy, dx, dy, dx));
+    }
+
+    nsIntRegion operator()(const ImageAttributes& aImage) {
+      MOZ_CRASH("GFX: this shouldn't be called for filters without inputs");
+      return nsIntRegion();
+    }
+
+    nsIntRegion operator()(const ToAlphaAttributes& aToAlpha) {
+      return mResultNeededRegion;
+    }
+  };
+
+  return aDescription.Attributes().match(PrimitiveAttributesMatcher(
+      aDescription, aResultNeededRegion, aInputIndex));
+}
+
+/* static */
+void FilterSupport::ComputeSourceNeededRegions(
+    const FilterDescription& aFilter, const nsIntRegion& aResultNeededRegion,
+    nsIntRegion& aSourceGraphicNeededRegion,
+    nsIntRegion& aFillPaintNeededRegion,
+    nsIntRegion& aStrokePaintNeededRegion) {
+  const nsTArray<FilterPrimitiveDescription>& primitives = aFilter.mPrimitives;
+  MOZ_ASSERT(!primitives.IsEmpty());
+  if (primitives.IsEmpty()) {
+    return;
+  }
+
+  nsTArray<nsIntRegion> primitiveNeededRegions;
+  primitiveNeededRegions.AppendElements(primitives.Length());
+
+  primitiveNeededRegions[primitives.Length() - 1] = aResultNeededRegion;
+
+  for (int32_t i = primitives.Length() - 1; i >= 0; --i) {
+    const FilterPrimitiveDescription& descr = primitives[i];
+    nsIntRegion neededRegion = primitiveNeededRegions[i];
+    neededRegion.And(neededRegion, descr.PrimitiveSubregion());
+
+    for (size_t j = 0; j < descr.NumberOfInputs(); j++) {
+      int32_t inputIndex = descr.InputPrimitiveIndex(j);
+      MOZ_ASSERT(inputIndex < i, "bad input index");
+      nsIntRegion* inputNeededRegion =
+          const_cast<nsIntRegion*>(&ElementForIndex(
+              inputIndex, primitiveNeededRegions, aSourceGraphicNeededRegion,
+              aFillPaintNeededRegion, aStrokePaintNeededRegion));
+      inputNeededRegion->Or(*inputNeededRegion, SourceNeededRegionForPrimitive(
+                                                    descr, neededRegion, j));
+    }
+  }
+
+  // Clip original SourceGraphic to first filter region.
+  const FilterPrimitiveDescription& firstDescr = primitives[0];
+  aSourceGraphicNeededRegion.And(aSourceGraphicNeededRegion,
+                                 firstDescr.FilterSpaceBounds());
+}
+
+// FilterPrimitiveDescription
+
+FilterPrimitiveDescription::FilterPrimitiveDescription()
+    : mAttributes(EmptyAttributes()),
+      mOutputColorSpace(ColorSpace::SRGB),
+      mIsTainted(false) {}
+
+FilterPrimitiveDescription::FilterPrimitiveDescription(
+    PrimitiveAttributes&& aAttributes)
+    : mAttributes(std::move(aAttributes)),
+      mOutputColorSpace(ColorSpace::SRGB),
+      mIsTainted(false) {}
+
+bool FilterPrimitiveDescription::operator==(
+    const FilterPrimitiveDescription& aOther) const {
+  return mFilterPrimitiveSubregion.IsEqualInterior(
+             aOther.mFilterPrimitiveSubregion) &&
+         mFilterSpaceBounds.IsEqualInterior(aOther.mFilterSpaceBounds) &&
+         mOutputColorSpace == aOther.mOutputColorSpace &&
+         mIsTainted == aOther.mIsTainted &&
+         mInputPrimitives == aOther.mInputPrimitives &&
+         mInputColorSpaces == aOther.mInputColorSpaces &&
+         mAttributes == aOther.mAttributes;
+}
+
+// FilterDescription
+
+bool FilterDescription::operator==(const FilterDescription& aOther) const {
+  return mPrimitives == aOther.mPrimitives;
+}
+
+}  // namespace gfx
+}  // namespace mozilla