diff -r 000000000000 -r 6474c204b198 gfx/2d/FilterProcessingScalar.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/2d/FilterProcessingScalar.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,321 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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/. */
+
+#define FILTER_PROCESSING_SCALAR
+
+#include "FilterProcessingSIMD-inl.h"
+
+namespace mozilla {
+namespace gfx {
+
+void
+FilterProcessing::ExtractAlpha_Scalar(const IntSize& size, uint8_t* sourceData, int32_t sourceStride, uint8_t* alphaData, int32_t alphaStride)
+{
+  for (int32_t y = 0; y < size.height; y++) {
+    for (int32_t x = 0; x < size.width; x++) {
+      int32_t sourceIndex = y * sourceStride + 4 * x;
+      int32_t targetIndex = y * alphaStride + x;
+      alphaData[targetIndex] = sourceData[sourceIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_A];
+    }
+  }
+}
+
+TemporaryRef<DataSourceSurface>
+FilterProcessing::ConvertToB8G8R8A8_Scalar(SourceSurface* aSurface)
+{
+  return ConvertToB8G8R8A8_SIMD<simd::Scalaru8x16_t>(aSurface);
+}
+
+template<BlendMode aBlendMode>
+static TemporaryRef<DataSourceSurface>
+ApplyBlending_Scalar(DataSourceSurface* aInput1, DataSourceSurface* aInput2)
+{
+  IntSize size = aInput1->GetSize();
+  RefPtr<DataSourceSurface> target =
+    Factory::CreateDataSourceSurface(size, SurfaceFormat::B8G8R8A8);
+  if (!target) {
+    return nullptr;
+  }
+
+  uint8_t* source1Data = aInput1->GetData();
+  uint8_t* source2Data = aInput2->GetData();
+  uint8_t* targetData = target->GetData();
+  uint32_t targetStride = target->Stride();
+  uint32_t source1Stride = aInput1->Stride();
+  uint32_t source2Stride = aInput2->Stride();
+
+  for (int32_t y = 0; y < size.height; y++) {
+    for (int32_t x = 0; x < size.width; x++) {
+      uint32_t targetIndex = y * targetStride + 4 * x;
+      uint32_t source1Index = y * source1Stride + 4 * x;
+      uint32_t source2Index = y * source2Stride + 4 * x;
+      uint32_t qa = source1Data[source1Index + B8G8R8A8_COMPONENT_BYTEOFFSET_A];
+      uint32_t qb = source2Data[source2Index + B8G8R8A8_COMPONENT_BYTEOFFSET_A];
+      for (int32_t i = std::min(B8G8R8A8_COMPONENT_BYTEOFFSET_B, B8G8R8A8_COMPONENT_BYTEOFFSET_R);
+           i <= std::max(B8G8R8A8_COMPONENT_BYTEOFFSET_B, B8G8R8A8_COMPONENT_BYTEOFFSET_R); i++) {
+        uint32_t ca = source1Data[source1Index + i];
+        uint32_t cb = source2Data[source2Index + i];
+        uint32_t val;
+        switch (aBlendMode) {
+          case BLEND_MODE_MULTIPLY:
+            val = ((255 - qa) * cb + (255 - qb + cb) * ca);
+            break;
+          case BLEND_MODE_SCREEN:
+            val = 255 * (cb + ca) - ca * cb;
+            break;
+          case BLEND_MODE_DARKEN:
+            val = umin((255 - qa) * cb + 255 * ca,
+                       (255 - qb) * ca + 255 * cb);
+            break;
+          case BLEND_MODE_LIGHTEN:
+            val = umax((255 - qa) * cb + 255 * ca,
+                       (255 - qb) * ca + 255 * cb);
+            break;
+          default:
+            MOZ_CRASH();
+        }
+        val = umin(FilterProcessing::FastDivideBy255<unsigned>(val), 255U);
+        targetData[targetIndex + i] = static_cast<uint8_t>(val);
+      }
+      uint32_t alpha = 255 * 255 - (255 - qa) * (255 - qb);
+      targetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_A] =
+        FilterProcessing::FastDivideBy255<uint8_t>(alpha);
+    }
+  }
+
+  return target;
+}
+
+TemporaryRef<DataSourceSurface>
+FilterProcessing::ApplyBlending_Scalar(DataSourceSurface* aInput1, DataSourceSurface* aInput2,
+                                       BlendMode aBlendMode)
+{
+  switch (aBlendMode) {
+    case BLEND_MODE_MULTIPLY:
+      return gfx::ApplyBlending_Scalar<BLEND_MODE_MULTIPLY>(aInput1, aInput2);
+    case BLEND_MODE_SCREEN:
+      return gfx::ApplyBlending_Scalar<BLEND_MODE_SCREEN>(aInput1, aInput2);
+    case BLEND_MODE_DARKEN:
+      return gfx::ApplyBlending_Scalar<BLEND_MODE_DARKEN>(aInput1, aInput2);
+    case BLEND_MODE_LIGHTEN:
+      return gfx::ApplyBlending_Scalar<BLEND_MODE_LIGHTEN>(aInput1, aInput2);
+    default:
+      return nullptr;
+  }
+}
+
+template<MorphologyOperator Operator>
+static void
+ApplyMorphologyHorizontal_Scalar(uint8_t* aSourceData, int32_t aSourceStride,
+                                 uint8_t* aDestData, int32_t aDestStride,
+                                 const IntRect& aDestRect, int32_t aRadius)
+{
+  static_assert(Operator == MORPHOLOGY_OPERATOR_ERODE ||
+                Operator == MORPHOLOGY_OPERATOR_DILATE,
+                "unexpected morphology operator");
+
+  for (int32_t y = aDestRect.y; y < aDestRect.YMost(); y++) {
+    int32_t startX = aDestRect.x - aRadius;
+    int32_t endX = aDestRect.x + aRadius;
+    for (int32_t x = aDestRect.x; x < aDestRect.XMost(); x++, startX++, endX++) {
+      int32_t sourceIndex = y * aSourceStride + 4 * startX;
+      uint8_t u[4];
+      for (size_t i = 0; i < 4; i++) {
+        u[i] = aSourceData[sourceIndex + i];
+      }
+      sourceIndex += 4;
+      for (int32_t ix = startX + 1; ix <= endX; ix++, sourceIndex += 4) {
+        for (size_t i = 0; i < 4; i++) {
+          if (Operator == MORPHOLOGY_OPERATOR_ERODE) {
+            u[i] = umin(u[i], aSourceData[sourceIndex + i]);
+          } else {
+            u[i] = umax(u[i], aSourceData[sourceIndex + i]);
+          }
+        }
+      }
+
+      int32_t destIndex = y * aDestStride + 4 * x;
+      for (size_t i = 0; i < 4; i++) {
+        aDestData[destIndex+i] = u[i];
+      }
+    }
+  }
+}
+
+void
+FilterProcessing::ApplyMorphologyHorizontal_Scalar(uint8_t* aSourceData, int32_t aSourceStride,
+                                                   uint8_t* aDestData, int32_t aDestStride,
+                                                   const IntRect& aDestRect, int32_t aRadius,
+                                                   MorphologyOperator aOp)
+{
+  if (aOp == MORPHOLOGY_OPERATOR_ERODE) {
+    gfx::ApplyMorphologyHorizontal_Scalar<MORPHOLOGY_OPERATOR_ERODE>(
+      aSourceData, aSourceStride, aDestData, aDestStride, aDestRect, aRadius);
+  } else {
+    gfx::ApplyMorphologyHorizontal_Scalar<MORPHOLOGY_OPERATOR_DILATE>(
+      aSourceData, aSourceStride, aDestData, aDestStride, aDestRect, aRadius);
+  }
+}
+
+template<MorphologyOperator Operator>
+static void ApplyMorphologyVertical_Scalar(uint8_t* aSourceData, int32_t aSourceStride,
+                                           uint8_t* aDestData, int32_t aDestStride,
+                                           const IntRect& aDestRect, int32_t aRadius)
+{
+  static_assert(Operator == MORPHOLOGY_OPERATOR_ERODE ||
+                Operator == MORPHOLOGY_OPERATOR_DILATE,
+                "unexpected morphology operator");
+
+  int32_t startY = aDestRect.y - aRadius;
+  int32_t endY = aDestRect.y + aRadius;
+  for (int32_t y = aDestRect.y; y < aDestRect.YMost(); y++, startY++, endY++) {
+    for (int32_t x = aDestRect.x; x < aDestRect.XMost(); x++) {
+      int32_t sourceIndex = startY * aSourceStride + 4 * x;
+      uint8_t u[4];
+      for (size_t i = 0; i < 4; i++) {
+        u[i] = aSourceData[sourceIndex + i];
+      }
+      sourceIndex += aSourceStride;
+      for (int32_t iy = startY + 1; iy <= endY; iy++, sourceIndex += aSourceStride) {
+        for (size_t i = 0; i < 4; i++) {
+          if (Operator == MORPHOLOGY_OPERATOR_ERODE) {
+            u[i] = umin(u[i], aSourceData[sourceIndex + i]);
+          } else {
+            u[i] = umax(u[i], aSourceData[sourceIndex + i]);
+          }
+        }
+      }
+
+      int32_t destIndex = y * aDestStride + 4 * x;
+      for (size_t i = 0; i < 4; i++) {
+        aDestData[destIndex+i] = u[i];
+      }
+    }
+  }
+}
+
+void
+FilterProcessing::ApplyMorphologyVertical_Scalar(uint8_t* aSourceData, int32_t aSourceStride,
+                                                   uint8_t* aDestData, int32_t aDestStride,
+                                                   const IntRect& aDestRect, int32_t aRadius,
+                                                   MorphologyOperator aOp)
+{
+  if (aOp == MORPHOLOGY_OPERATOR_ERODE) {
+    gfx::ApplyMorphologyVertical_Scalar<MORPHOLOGY_OPERATOR_ERODE>(
+      aSourceData, aSourceStride, aDestData, aDestStride, aDestRect, aRadius);
+  } else {
+    gfx::ApplyMorphologyVertical_Scalar<MORPHOLOGY_OPERATOR_DILATE>(
+      aSourceData, aSourceStride, aDestData, aDestStride, aDestRect, aRadius);
+  }
+}
+
+TemporaryRef<DataSourceSurface>
+FilterProcessing::ApplyColorMatrix_Scalar(DataSourceSurface* aInput, const Matrix5x4 &aMatrix)
+{
+  return ApplyColorMatrix_SIMD<simd::Scalari32x4_t,simd::Scalari16x8_t,simd::Scalaru8x16_t>(aInput, aMatrix);
+}
+
+void
+FilterProcessing::ApplyComposition_Scalar(DataSourceSurface* aSource, DataSourceSurface* aDest,
+                                          CompositeOperator aOperator)
+{
+  return ApplyComposition_SIMD<simd::Scalari32x4_t,simd::Scalaru16x8_t,simd::Scalaru8x16_t>(aSource, aDest, aOperator);
+}
+
+void
+FilterProcessing::SeparateColorChannels_Scalar(const IntSize &size, uint8_t* sourceData, int32_t sourceStride, uint8_t* channel0Data, uint8_t* channel1Data, uint8_t* channel2Data, uint8_t* channel3Data, int32_t channelStride)
+{
+  for (int32_t y = 0; y < size.height; y++) {
+    for (int32_t x = 0; x < size.width; x++) {
+      int32_t sourceIndex = y * sourceStride + 4 * x;
+      int32_t targetIndex = y * channelStride + x;
+      channel0Data[targetIndex] = sourceData[sourceIndex];
+      channel1Data[targetIndex] = sourceData[sourceIndex+1];
+      channel2Data[targetIndex] = sourceData[sourceIndex+2];
+      channel3Data[targetIndex] = sourceData[sourceIndex+3];
+    }
+  }
+}
+
+void
+FilterProcessing::CombineColorChannels_Scalar(const IntSize &size, int32_t resultStride, uint8_t* resultData, int32_t channelStride, uint8_t* channel0Data, uint8_t* channel1Data, uint8_t* channel2Data, uint8_t* channel3Data)
+{
+  for (int32_t y = 0; y < size.height; y++) {
+    for (int32_t x = 0; x < size.width; x++) {
+      int32_t resultIndex = y * resultStride + 4 * x;
+      int32_t channelIndex = y * channelStride + x;
+      resultData[resultIndex] = channel0Data[channelIndex];
+      resultData[resultIndex+1] = channel1Data[channelIndex];
+      resultData[resultIndex+2] = channel2Data[channelIndex];
+      resultData[resultIndex+3] = channel3Data[channelIndex];
+    }
+  }
+}
+
+void
+FilterProcessing::DoPremultiplicationCalculation_Scalar(const IntSize& aSize,
+                                     uint8_t* aTargetData, int32_t aTargetStride,
+                                     uint8_t* aSourceData, int32_t aSourceStride)
+{
+  for (int32_t y = 0; y < aSize.height; y++) {
+    for (int32_t x = 0; x < aSize.width; x++) {
+      int32_t inputIndex = y * aSourceStride + 4 * x;
+      int32_t targetIndex = y * aTargetStride + 4 * x;
+      uint8_t alpha = aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_A];
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_R] =
+        FastDivideBy255<uint8_t>(aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_R] * alpha);
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_G] =
+        FastDivideBy255<uint8_t>(aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_G] * alpha);
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_B] =
+        FastDivideBy255<uint8_t>(aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_B] * alpha);
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_A] = alpha;
+    }
+  }
+}
+
+void
+FilterProcessing::DoUnpremultiplicationCalculation_Scalar(
+                                 const IntSize& aSize,
+                                 uint8_t* aTargetData, int32_t aTargetStride,
+                                 uint8_t* aSourceData, int32_t aSourceStride)
+{
+  for (int32_t y = 0; y < aSize.height; y++) {
+    for (int32_t x = 0; x < aSize.width; x++) {
+      int32_t inputIndex = y * aSourceStride + 4 * x;
+      int32_t targetIndex = y * aTargetStride + 4 * x;
+      uint8_t alpha = aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_A];
+      uint16_t alphaFactor = sAlphaFactors[alpha];
+      // inputColor * alphaFactor + 128 is guaranteed to fit into uint16_t
+      // because the input is premultiplied and thus inputColor <= inputAlpha.
+      // The maximum value this can attain is 65520 (which is less than 65535)
+      // for color == alpha == 244:
+      // 244 * sAlphaFactors[244] + 128 == 244 * 268 + 128 == 65520
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_R] =
+        (aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_R] * alphaFactor + 128) >> 8;
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_G] =
+        (aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_G] * alphaFactor + 128) >> 8;
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_B] =
+        (aSourceData[inputIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_B] * alphaFactor + 128) >> 8;
+      aTargetData[targetIndex + B8G8R8A8_COMPONENT_BYTEOFFSET_A] = alpha;
+    }
+  }
+}
+
+TemporaryRef<DataSourceSurface>
+FilterProcessing::RenderTurbulence_Scalar(const IntSize &aSize, const Point &aOffset, const Size &aBaseFrequency,
+                                          int32_t aSeed, int aNumOctaves, TurbulenceType aType, bool aStitch, const Rect &aTileRect)
+{
+   return RenderTurbulence_SIMD<simd::Scalarf32x4_t,simd::Scalari32x4_t,simd::Scalaru8x16_t>(
+     aSize, aOffset, aBaseFrequency, aSeed, aNumOctaves, aType, aStitch, aTileRect);
+}
+
+TemporaryRef<DataSourceSurface>
+FilterProcessing::ApplyArithmeticCombine_Scalar(DataSourceSurface* aInput1, DataSourceSurface* aInput2, Float aK1, Float aK2, Float aK3, Float aK4)
+{
+  return ApplyArithmeticCombine_SIMD<simd::Scalari32x4_t,simd::Scalari16x8_t,simd::Scalaru8x16_t>(aInput1, aInput2, aK1, aK2, aK3, aK4);
+}
+
+} // namespace mozilla
+} // namespace gfx