Adding upstream version 124.0.1.upstream/124.0.1

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

1 files changed, 1574 insertions, 0 deletions

diff --git a/gfx/2d/Swizzle.cpp b/gfx/2d/Swizzle.cpp
new file mode 100644
index 0000000000..03647348f3
--- /dev/null
+++ b/gfx/2d/Swizzle.cpp
@@ -0,0 +1,1574 @@
+/* -*- 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 "Swizzle.h"
+#include "Logging.h"
+#include "Orientation.h"
+#include "Tools.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/EndianUtils.h"
+#include "mozilla/UniquePtr.h"
+
+#ifdef USE_SSE2
+#  include "mozilla/SSE.h"
+#endif
+
+#ifdef USE_NEON
+#  include "mozilla/arm.h"
+#endif
+
+#include <new>
+
+namespace mozilla {
+namespace gfx {
+
+/**
+ * Convenience macros for dispatching to various format combinations.
+ */
+
+// Hash the formats to a relatively dense value to optimize jump table
+// generation. The first 6 formats in SurfaceFormat are the 32-bit BGRA variants
+// and are the most common formats dispatched here. Room is reserved in the
+// lowish bits for up to these 6 destination formats. If a destination format is
+// >= 6, the 6th bit is set to avoid collisions.
+#define FORMAT_KEY(aSrcFormat, aDstFormat) \
+  (int(aSrcFormat) * 6 + int(aDstFormat) + (int(int(aDstFormat) >= 6) << 6))
+
+#define FORMAT_CASE_EXPR(aSrcFormat, aDstFormat, ...) \
+  case FORMAT_KEY(aSrcFormat, aDstFormat):            \
+    __VA_ARGS__;                                      \
+    return true;
+
+#define FORMAT_CASE(aSrcFormat, aDstFormat, ...) \
+  FORMAT_CASE_EXPR(aSrcFormat, aDstFormat, FORMAT_CASE_CALL(__VA_ARGS__))
+
+#define FORMAT_CASE_ROW(aSrcFormat, aDstFormat, ...) \
+  case FORMAT_KEY(aSrcFormat, aDstFormat):           \
+    return &__VA_ARGS__;
+
+/**
+ * Constexpr functions for analyzing format attributes in templates.
+ */
+
+// Whether B comes before R in pixel memory layout.
+static constexpr bool IsBGRFormat(SurfaceFormat aFormat) {
+  return aFormat == SurfaceFormat::B8G8R8A8 ||
+#if MOZ_LITTLE_ENDIAN()
+         aFormat == SurfaceFormat::R5G6B5_UINT16 ||
+#endif
+         aFormat == SurfaceFormat::B8G8R8X8 || aFormat == SurfaceFormat::B8G8R8;
+}
+
+// Whether the order of B and R need to be swapped to map from src to dst.
+static constexpr bool ShouldSwapRB(SurfaceFormat aSrcFormat,
+                                   SurfaceFormat aDstFormat) {
+  return IsBGRFormat(aSrcFormat) != IsBGRFormat(aDstFormat);
+}
+
+// The starting byte of the RGB components in pixel memory.
+static constexpr uint32_t RGBByteIndex(SurfaceFormat aFormat) {
+  return aFormat == SurfaceFormat::A8R8G8B8 ||
+                 aFormat == SurfaceFormat::X8R8G8B8
+             ? 1
+             : 0;
+}
+
+// The byte of the alpha component, which just comes after RGB.
+static constexpr uint32_t AlphaByteIndex(SurfaceFormat aFormat) {
+  return (RGBByteIndex(aFormat) + 3) % 4;
+}
+
+// The endian-dependent bit shift to access RGB of a UINT32 pixel.
+static constexpr uint32_t RGBBitShift(SurfaceFormat aFormat) {
+#if MOZ_LITTLE_ENDIAN()
+  return 8 * RGBByteIndex(aFormat);
+#else
+  return 8 - 8 * RGBByteIndex(aFormat);
+#endif
+}
+
+// The endian-dependent bit shift to access alpha of a UINT32 pixel.
+static constexpr uint32_t AlphaBitShift(SurfaceFormat aFormat) {
+  return (RGBBitShift(aFormat) + 24) % 32;
+}
+
+// Whether the pixel format should ignore the value of the alpha channel and
+// treat it as opaque.
+static constexpr bool IgnoreAlpha(SurfaceFormat aFormat) {
+  return aFormat == SurfaceFormat::B8G8R8X8 ||
+         aFormat == SurfaceFormat::R8G8B8X8 ||
+         aFormat == SurfaceFormat::X8R8G8B8;
+}
+
+// Whether to force alpha to opaque to map from src to dst.
+static constexpr bool ShouldForceOpaque(SurfaceFormat aSrcFormat,
+                                        SurfaceFormat aDstFormat) {
+  return IgnoreAlpha(aSrcFormat) != IgnoreAlpha(aDstFormat);
+}
+
+#ifdef USE_SSE2
+/**
+ * SSE2 optimizations
+ */
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void Premultiply_SSE2(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
+
+#  define PREMULTIPLY_SSE2(aSrcFormat, aDstFormat)                     \
+    FORMAT_CASE(aSrcFormat, aDstFormat,                                \
+                Premultiply_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                                 ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void PremultiplyRow_SSE2(const uint8_t*, uint8_t*, int32_t);
+
+#  define PREMULTIPLY_ROW_SSE2(aSrcFormat, aDstFormat)            \
+    FORMAT_CASE_ROW(                                              \
+        aSrcFormat, aDstFormat,                                   \
+        PremultiplyRow_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                            ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB>
+void Unpremultiply_SSE2(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
+
+#  define UNPREMULTIPLY_SSE2(aSrcFormat, aDstFormat) \
+    FORMAT_CASE(aSrcFormat, aDstFormat,              \
+                Unpremultiply_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB>
+void UnpremultiplyRow_SSE2(const uint8_t*, uint8_t*, int32_t);
+
+#  define UNPREMULTIPLY_ROW_SSE2(aSrcFormat, aDstFormat) \
+    FORMAT_CASE_ROW(                                     \
+        aSrcFormat, aDstFormat,                          \
+        UnpremultiplyRow_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void Swizzle_SSE2(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
+
+#  define SWIZZLE_SSE2(aSrcFormat, aDstFormat)                     \
+    FORMAT_CASE(aSrcFormat, aDstFormat,                            \
+                Swizzle_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                             ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void SwizzleRow_SSE2(const uint8_t*, uint8_t*, int32_t);
+
+#  define SWIZZLE_ROW_SSE2(aSrcFormat, aDstFormat)            \
+    FORMAT_CASE_ROW(                                          \
+        aSrcFormat, aDstFormat,                               \
+        SwizzleRow_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                        ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB>
+void UnpackRowRGB24_SSSE3(const uint8_t*, uint8_t*, int32_t);
+
+#  define UNPACK_ROW_RGB_SSSE3(aDstFormat) \
+    FORMAT_CASE_ROW(                       \
+        SurfaceFormat::R8G8B8, aDstFormat, \
+        UnpackRowRGB24_SSSE3<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
+
+template <bool aSwapRB>
+void UnpackRowRGB24_AVX2(const uint8_t*, uint8_t*, int32_t);
+
+#  define UNPACK_ROW_RGB_AVX2(aDstFormat)  \
+    FORMAT_CASE_ROW(                       \
+        SurfaceFormat::R8G8B8, aDstFormat, \
+        UnpackRowRGB24_AVX2<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
+
+#endif
+
+#ifdef USE_NEON
+/**
+ * ARM NEON optimizations
+ */
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void Premultiply_NEON(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
+
+#  define PREMULTIPLY_NEON(aSrcFormat, aDstFormat)                     \
+    FORMAT_CASE(aSrcFormat, aDstFormat,                                \
+                Premultiply_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                                 ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void PremultiplyRow_NEON(const uint8_t*, uint8_t*, int32_t);
+
+#  define PREMULTIPLY_ROW_NEON(aSrcFormat, aDstFormat)            \
+    FORMAT_CASE_ROW(                                              \
+        aSrcFormat, aDstFormat,                                   \
+        PremultiplyRow_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                            ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB>
+void Unpremultiply_NEON(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
+
+#  define UNPREMULTIPLY_NEON(aSrcFormat, aDstFormat) \
+    FORMAT_CASE(aSrcFormat, aDstFormat,              \
+                Unpremultiply_NEON<ShouldSwapRB(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB>
+void UnpremultiplyRow_NEON(const uint8_t*, uint8_t*, int32_t);
+
+#  define UNPREMULTIPLY_ROW_NEON(aSrcFormat, aDstFormat) \
+    FORMAT_CASE_ROW(                                     \
+        aSrcFormat, aDstFormat,                          \
+        UnpremultiplyRow_NEON<ShouldSwapRB(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void Swizzle_NEON(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
+
+#  define SWIZZLE_NEON(aSrcFormat, aDstFormat)                     \
+    FORMAT_CASE(aSrcFormat, aDstFormat,                            \
+                Swizzle_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                             ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB, bool aOpaqueAlpha>
+void SwizzleRow_NEON(const uint8_t*, uint8_t*, int32_t);
+
+#  define SWIZZLE_ROW_NEON(aSrcFormat, aDstFormat)            \
+    FORMAT_CASE_ROW(                                          \
+        aSrcFormat, aDstFormat,                               \
+        SwizzleRow_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                        ShouldForceOpaque(aSrcFormat, aDstFormat)>)
+
+template <bool aSwapRB>
+void UnpackRowRGB24_NEON(const uint8_t*, uint8_t*, int32_t);
+
+#  define UNPACK_ROW_RGB_NEON(aDstFormat)  \
+    FORMAT_CASE_ROW(                       \
+        SurfaceFormat::R8G8B8, aDstFormat, \
+        UnpackRowRGB24_NEON<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
+#endif
+
+/**
+ * Premultiplying
+ */
+
+// Fallback premultiply implementation that uses splayed pixel math to reduce
+// the multiplications used. That is, the R and B components are isolated from
+// the G and A components, which then can be multiplied as if they were two
+// 2-component vectors. Otherwise, an approximation if divide-by-255 is used
+// which is faster than an actual division. These optimizations are also used
+// for the SSE2 and NEON implementations.
+template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
+          uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
+static void PremultiplyChunkFallback(const uint8_t*& aSrc, uint8_t*& aDst,
+                                     int32_t aLength) {
+  const uint8_t* end = aSrc + 4 * aLength;
+  do {
+    // Load and process 1 entire pixel at a time.
+    uint32_t color = *reinterpret_cast<const uint32_t*>(aSrc);
+
+    uint32_t a = aSrcAShift ? color >> aSrcAShift : color & 0xFF;
+
+    // Isolate the R and B components.
+    uint32_t rb = (color >> aSrcRGBShift) & 0x00FF00FF;
+    // Swap the order of R and B if necessary.
+    if (aSwapRB) {
+      rb = (rb >> 16) | (rb << 16);
+    }
+    // Approximate the multiply by alpha and divide by 255 which is
+    // essentially:
+    // c = c*a + 255; c = (c + (c >> 8)) >> 8;
+    // However, we omit the final >> 8 to fold it with the final shift into
+    // place depending on desired output format.
+    rb = rb * a + 0x00FF00FF;
+    rb = (rb + ((rb >> 8) & 0x00FF00FF)) & 0xFF00FF00;
+
+    // Use same approximation as above, but G is shifted 8 bits left.
+    // Alpha is left out and handled separately.
+    uint32_t g = color & (0xFF00 << aSrcRGBShift);
+    g = g * a + (0xFF00 << aSrcRGBShift);
+    g = (g + (g >> 8)) & (0xFF0000 << aSrcRGBShift);
+
+    // The above math leaves RGB shifted left by 8 bits.
+    // Shift them right if required for the output format.
+    // then combine them back together to produce output pixel.
+    // Add the alpha back on if the output format is not opaque.
+    *reinterpret_cast<uint32_t*>(aDst) =
+        (rb >> (8 - aDstRGBShift)) | (g >> (8 + aSrcRGBShift - aDstRGBShift)) |
+        (aOpaqueAlpha ? 0xFF << aDstAShift : a << aDstAShift);
+
+    aSrc += 4;
+    aDst += 4;
+  } while (aSrc < end);
+}
+
+template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
+          uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
+static void PremultiplyRowFallback(const uint8_t* aSrc, uint8_t* aDst,
+                                   int32_t aLength) {
+  PremultiplyChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
+                           aDstRGBShift, aDstAShift>(aSrc, aDst, aLength);
+}
+
+template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
+          uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
+static void PremultiplyFallback(const uint8_t* aSrc, int32_t aSrcGap,
+                                uint8_t* aDst, int32_t aDstGap, IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    PremultiplyChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
+                             aDstRGBShift, aDstAShift>(aSrc, aDst, aSize.width);
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+#define PREMULTIPLY_FALLBACK_CASE(aSrcFormat, aDstFormat)                     \
+  FORMAT_CASE(                                                                \
+      aSrcFormat, aDstFormat,                                                 \
+      PremultiplyFallback<ShouldSwapRB(aSrcFormat, aDstFormat),               \
+                          ShouldForceOpaque(aSrcFormat, aDstFormat),          \
+                          RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
+                          RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
+
+#define PREMULTIPLY_FALLBACK(aSrcFormat)                         \
+  PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8A8) \
+  PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8X8) \
+  PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8A8) \
+  PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8X8) \
+  PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::A8R8G8B8) \
+  PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::X8R8G8B8)
+
+#define PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, aDstFormat)             \
+  FORMAT_CASE_ROW(aSrcFormat, aDstFormat,                                 \
+                  PremultiplyRowFallback<                                 \
+                      ShouldSwapRB(aSrcFormat, aDstFormat),               \
+                      ShouldForceOpaque(aSrcFormat, aDstFormat),          \
+                      RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
+                      RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
+
+#define PREMULTIPLY_ROW_FALLBACK(aSrcFormat)                         \
+  PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8A8) \
+  PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8X8) \
+  PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8A8) \
+  PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8X8) \
+  PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::A8R8G8B8) \
+  PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::X8R8G8B8)
+
+// If rows are tightly packed, and the size of the total area will fit within
+// the precision range of a single row, then process all the data as if it was
+// a single row.
+static inline IntSize CollapseSize(const IntSize& aSize, int32_t aSrcStride,
+                                   int32_t aDstStride) {
+  if (aSrcStride == aDstStride && (aSrcStride & 3) == 0 &&
+      aSrcStride / 4 == aSize.width) {
+    CheckedInt32 area = CheckedInt32(aSize.width) * CheckedInt32(aSize.height);
+    if (area.isValid()) {
+      return IntSize(area.value(), 1);
+    }
+  }
+  return aSize;
+}
+
+static inline int32_t GetStrideGap(int32_t aWidth, SurfaceFormat aFormat,
+                                   int32_t aStride) {
+  CheckedInt32 used = CheckedInt32(aWidth) * BytesPerPixel(aFormat);
+  if (!used.isValid() || used.value() < 0) {
+    return -1;
+  }
+  return aStride - used.value();
+}
+
+bool PremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
+                     SurfaceFormat aSrcFormat, uint8_t* aDst,
+                     int32_t aDstStride, SurfaceFormat aDstFormat,
+                     const IntSize& aSize) {
+  if (aSize.IsEmpty()) {
+    return true;
+  }
+  IntSize size = CollapseSize(aSize, aSrcStride, aDstStride);
+  // Find gap from end of row to the start of the next row.
+  int32_t srcGap = GetStrideGap(aSize.width, aSrcFormat, aSrcStride);
+  int32_t dstGap = GetStrideGap(aSize.width, aDstFormat, aDstStride);
+  MOZ_ASSERT(srcGap >= 0 && dstGap >= 0);
+  if (srcGap < 0 || dstGap < 0) {
+    return false;
+  }
+
+#define FORMAT_CASE_CALL(...) __VA_ARGS__(aSrc, srcGap, aDst, dstGap, size)
+
+#ifdef USE_SSE2
+  if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
+      PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      default:
+        break;
+    }
+#endif
+
+#ifdef USE_NEON
+  if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
+      PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      default:
+        break;
+    }
+#endif
+
+  switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+    PREMULTIPLY_FALLBACK(SurfaceFormat::B8G8R8A8)
+    PREMULTIPLY_FALLBACK(SurfaceFormat::R8G8B8A8)
+    PREMULTIPLY_FALLBACK(SurfaceFormat::A8R8G8B8)
+    default:
+      break;
+  }
+
+#undef FORMAT_CASE_CALL
+
+  MOZ_ASSERT(false, "Unsupported premultiply formats");
+  return false;
+}
+
+SwizzleRowFn PremultiplyRow(SurfaceFormat aSrcFormat,
+                            SurfaceFormat aDstFormat) {
+#ifdef USE_SSE2
+  if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      default:
+        break;
+    }
+#endif
+
+#ifdef USE_NEON
+  if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      default:
+        break;
+    }
+#endif
+
+  switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+    PREMULTIPLY_ROW_FALLBACK(SurfaceFormat::B8G8R8A8)
+    PREMULTIPLY_ROW_FALLBACK(SurfaceFormat::R8G8B8A8)
+    PREMULTIPLY_ROW_FALLBACK(SurfaceFormat::A8R8G8B8)
+    default:
+      break;
+  }
+
+  MOZ_ASSERT_UNREACHABLE("Unsupported premultiply formats");
+  return nullptr;
+}
+
+/**
+ * Unpremultiplying
+ */
+
+// Generate a table of 8.16 fixed-point reciprocals representing 1/alpha.
+#define UNPREMULQ(x) (0xFF00FFU / (x))
+#define UNPREMULQ_2(x) UNPREMULQ(x), UNPREMULQ((x) + 1)
+#define UNPREMULQ_4(x) UNPREMULQ_2(x), UNPREMULQ_2((x) + 2)
+#define UNPREMULQ_8(x) UNPREMULQ_4(x), UNPREMULQ_4((x) + 4)
+#define UNPREMULQ_16(x) UNPREMULQ_8(x), UNPREMULQ_8((x) + 8)
+#define UNPREMULQ_32(x) UNPREMULQ_16(x), UNPREMULQ_16((x) + 16)
+static const uint32_t sUnpremultiplyTable[256] = {0,
+                                                  UNPREMULQ(1),
+                                                  UNPREMULQ_2(2),
+                                                  UNPREMULQ_4(4),
+                                                  UNPREMULQ_8(8),
+                                                  UNPREMULQ_16(16),
+                                                  UNPREMULQ_32(32),
+                                                  UNPREMULQ_32(64),
+                                                  UNPREMULQ_32(96),
+                                                  UNPREMULQ_32(128),
+                                                  UNPREMULQ_32(160),
+                                                  UNPREMULQ_32(192),
+                                                  UNPREMULQ_32(224)};
+
+// Fallback unpremultiply implementation that uses 8.16 fixed-point reciprocal
+// math to eliminate any division by the alpha component. This optimization is
+// used for the SSE2 and NEON implementations, with some adaptations. This
+// implementation also accesses color components using individual byte accesses
+// as this profiles faster than accessing the pixel as a uint32_t and
+// shifting/masking to access components.
+template <bool aSwapRB, uint32_t aSrcRGBIndex, uint32_t aSrcAIndex,
+          uint32_t aDstRGBIndex, uint32_t aDstAIndex>
+static void UnpremultiplyChunkFallback(const uint8_t*& aSrc, uint8_t*& aDst,
+                                       int32_t aLength) {
+  const uint8_t* end = aSrc + 4 * aLength;
+  do {
+    uint8_t r = aSrc[aSrcRGBIndex + (aSwapRB ? 2 : 0)];
+    uint8_t g = aSrc[aSrcRGBIndex + 1];
+    uint8_t b = aSrc[aSrcRGBIndex + (aSwapRB ? 0 : 2)];
+    uint8_t a = aSrc[aSrcAIndex];
+
+    // Access the 8.16 reciprocal from the table based on alpha. Multiply by
+    // the reciprocal and shift off the fraction bits to approximate the
+    // division by alpha.
+    uint32_t q = sUnpremultiplyTable[a];
+    aDst[aDstRGBIndex + 0] = (r * q) >> 16;
+    aDst[aDstRGBIndex + 1] = (g * q) >> 16;
+    aDst[aDstRGBIndex + 2] = (b * q) >> 16;
+    aDst[aDstAIndex] = a;
+
+    aSrc += 4;
+    aDst += 4;
+  } while (aSrc < end);
+}
+
+template <bool aSwapRB, uint32_t aSrcRGBIndex, uint32_t aSrcAIndex,
+          uint32_t aDstRGBIndex, uint32_t aDstAIndex>
+static void UnpremultiplyRowFallback(const uint8_t* aSrc, uint8_t* aDst,
+                                     int32_t aLength) {
+  UnpremultiplyChunkFallback<aSwapRB, aSrcRGBIndex, aSrcAIndex, aDstRGBIndex,
+                             aDstAIndex>(aSrc, aDst, aLength);
+}
+
+template <bool aSwapRB, uint32_t aSrcRGBIndex, uint32_t aSrcAIndex,
+          uint32_t aDstRGBIndex, uint32_t aDstAIndex>
+static void UnpremultiplyFallback(const uint8_t* aSrc, int32_t aSrcGap,
+                                  uint8_t* aDst, int32_t aDstGap,
+                                  IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    UnpremultiplyChunkFallback<aSwapRB, aSrcRGBIndex, aSrcAIndex, aDstRGBIndex,
+                               aDstAIndex>(aSrc, aDst, aSize.width);
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+#define UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, aDstFormat)             \
+  FORMAT_CASE(aSrcFormat, aDstFormat,                                   \
+              UnpremultiplyFallback<                                    \
+                  ShouldSwapRB(aSrcFormat, aDstFormat),                 \
+                  RGBByteIndex(aSrcFormat), AlphaByteIndex(aSrcFormat), \
+                  RGBByteIndex(aDstFormat), AlphaByteIndex(aDstFormat)>)
+
+#define UNPREMULTIPLY_FALLBACK(aSrcFormat)                         \
+  UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8A8) \
+  UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8A8) \
+  UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::A8R8G8B8)
+
+#define UNPREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, aDstFormat)             \
+  FORMAT_CASE_ROW(aSrcFormat, aDstFormat,                                   \
+                  UnpremultiplyRowFallback<                                 \
+                      ShouldSwapRB(aSrcFormat, aDstFormat),                 \
+                      RGBByteIndex(aSrcFormat), AlphaByteIndex(aSrcFormat), \
+                      RGBByteIndex(aDstFormat), AlphaByteIndex(aDstFormat)>)
+
+#define UNPREMULTIPLY_ROW_FALLBACK(aSrcFormat)                         \
+  UNPREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8A8) \
+  UNPREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8A8) \
+  UNPREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::A8R8G8B8)
+
+bool UnpremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
+                       SurfaceFormat aSrcFormat, uint8_t* aDst,
+                       int32_t aDstStride, SurfaceFormat aDstFormat,
+                       const IntSize& aSize) {
+  if (aSize.IsEmpty()) {
+    return true;
+  }
+  IntSize size = CollapseSize(aSize, aSrcStride, aDstStride);
+  // Find gap from end of row to the start of the next row.
+  int32_t srcGap = GetStrideGap(aSize.width, aSrcFormat, aSrcStride);
+  int32_t dstGap = GetStrideGap(aSize.width, aDstFormat, aDstStride);
+  MOZ_ASSERT(srcGap >= 0 && dstGap >= 0);
+  if (srcGap < 0 || dstGap < 0) {
+    return false;
+  }
+
+#define FORMAT_CASE_CALL(...) __VA_ARGS__(aSrc, srcGap, aDst, dstGap, size)
+
+#ifdef USE_SSE2
+  if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      UNPREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      UNPREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+#ifdef USE_NEON
+  if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      UNPREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      UNPREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+  switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+    UNPREMULTIPLY_FALLBACK(SurfaceFormat::B8G8R8A8)
+    UNPREMULTIPLY_FALLBACK(SurfaceFormat::R8G8B8A8)
+    UNPREMULTIPLY_FALLBACK(SurfaceFormat::A8R8G8B8)
+    default:
+      break;
+  }
+
+#undef FORMAT_CASE_CALL
+
+  MOZ_ASSERT(false, "Unsupported unpremultiply formats");
+  return false;
+}
+
+SwizzleRowFn UnpremultiplyRow(SurfaceFormat aSrcFormat,
+                              SurfaceFormat aDstFormat) {
+#ifdef USE_SSE2
+  if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      UNPREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      UNPREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+#ifdef USE_NEON
+  if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      UNPREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
+      UNPREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
+      UNPREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+  switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+    UNPREMULTIPLY_ROW_FALLBACK(SurfaceFormat::B8G8R8A8)
+    UNPREMULTIPLY_ROW_FALLBACK(SurfaceFormat::R8G8B8A8)
+    UNPREMULTIPLY_ROW_FALLBACK(SurfaceFormat::A8R8G8B8)
+    default:
+      break;
+  }
+
+  MOZ_ASSERT_UNREACHABLE("Unsupported premultiply formats");
+  return nullptr;
+}
+
+/**
+ * Swizzling
+ */
+
+// Fallback swizzle implementation that uses shifting and masking to reorder
+// pixels.
+template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
+          uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
+static void SwizzleChunkFallback(const uint8_t*& aSrc, uint8_t*& aDst,
+                                 int32_t aLength) {
+  const uint8_t* end = aSrc + 4 * aLength;
+  do {
+    uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
+
+    if (aSwapRB) {
+      // Handle R and B swaps by exchanging words and masking.
+      uint32_t rb =
+          ((rgba << 16) | (rgba >> 16)) & (0x00FF00FF << aSrcRGBShift);
+      uint32_t ga = rgba & ((0xFF << aSrcAShift) | (0xFF00 << aSrcRGBShift));
+      rgba = rb | ga;
+    }
+
+    // If src and dst shifts differ, rotate left or right to move RGB into
+    // place, i.e. ARGB -> RGBA or ARGB -> RGBA.
+    if (aDstRGBShift > aSrcRGBShift) {
+      rgba = (rgba << 8) | (aOpaqueAlpha ? 0x000000FF : rgba >> 24);
+    } else if (aSrcRGBShift > aDstRGBShift) {
+      rgba = (rgba >> 8) | (aOpaqueAlpha ? 0xFF000000 : rgba << 24);
+    } else if (aOpaqueAlpha) {
+      rgba |= 0xFF << aDstAShift;
+    }
+
+    *reinterpret_cast<uint32_t*>(aDst) = rgba;
+
+    aSrc += 4;
+    aDst += 4;
+  } while (aSrc < end);
+}
+
+template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
+          uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
+static void SwizzleRowFallback(const uint8_t* aSrc, uint8_t* aDst,
+                               int32_t aLength) {
+  SwizzleChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
+                       aDstRGBShift, aDstAShift>(aSrc, aDst, aLength);
+}
+
+template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
+          uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
+static void SwizzleFallback(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
+                            int32_t aDstGap, IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    SwizzleChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
+                         aDstRGBShift, aDstAShift>(aSrc, aDst, aSize.width);
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+#define SWIZZLE_FALLBACK(aSrcFormat, aDstFormat)                          \
+  FORMAT_CASE(                                                            \
+      aSrcFormat, aDstFormat,                                             \
+      SwizzleFallback<ShouldSwapRB(aSrcFormat, aDstFormat),               \
+                      ShouldForceOpaque(aSrcFormat, aDstFormat),          \
+                      RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
+                      RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
+
+#define SWIZZLE_ROW_FALLBACK(aSrcFormat, aDstFormat)                         \
+  FORMAT_CASE_ROW(                                                           \
+      aSrcFormat, aDstFormat,                                                \
+      SwizzleRowFallback<ShouldSwapRB(aSrcFormat, aDstFormat),               \
+                         ShouldForceOpaque(aSrcFormat, aDstFormat),          \
+                         RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
+                         RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
+
+// Fast-path for matching formats.
+template <int32_t aBytesPerPixel>
+static void SwizzleRowCopy(const uint8_t* aSrc, uint8_t* aDst,
+                           int32_t aLength) {
+  if (aSrc != aDst) {
+    memcpy(aDst, aSrc, aLength * aBytesPerPixel);
+  }
+}
+
+// Fast-path for matching formats.
+static void SwizzleCopy(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
+                        int32_t aDstGap, IntSize aSize, int32_t aBPP) {
+  if (aSrc != aDst) {
+    int32_t rowLength = aBPP * aSize.width;
+    for (int32_t height = aSize.height; height > 0; height--) {
+      memcpy(aDst, aSrc, rowLength);
+      aSrc += rowLength + aSrcGap;
+      aDst += rowLength + aDstGap;
+    }
+  }
+}
+
+// Fast-path for conversions that swap all bytes.
+template <bool aOpaqueAlpha, uint32_t aSrcAShift, uint32_t aDstAShift>
+static void SwizzleChunkSwap(const uint8_t*& aSrc, uint8_t*& aDst,
+                             int32_t aLength) {
+  const uint8_t* end = aSrc + 4 * aLength;
+  do {
+    // Use an endian swap to move the bytes, i.e. BGRA -> ARGB.
+    uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
+#if MOZ_LITTLE_ENDIAN()
+    rgba = NativeEndian::swapToBigEndian(rgba);
+#else
+    rgba = NativeEndian::swapToLittleEndian(rgba);
+#endif
+    if (aOpaqueAlpha) {
+      rgba |= 0xFF << aDstAShift;
+    }
+    *reinterpret_cast<uint32_t*>(aDst) = rgba;
+    aSrc += 4;
+    aDst += 4;
+  } while (aSrc < end);
+}
+
+template <bool aOpaqueAlpha, uint32_t aSrcAShift, uint32_t aDstAShift>
+static void SwizzleRowSwap(const uint8_t* aSrc, uint8_t* aDst,
+                           int32_t aLength) {
+  SwizzleChunkSwap<aOpaqueAlpha, aSrcAShift, aDstAShift>(aSrc, aDst, aLength);
+}
+
+template <bool aOpaqueAlpha, uint32_t aSrcAShift, uint32_t aDstAShift>
+static void SwizzleSwap(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
+                        int32_t aDstGap, IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    SwizzleChunkSwap<aOpaqueAlpha, aSrcAShift, aDstAShift>(aSrc, aDst,
+                                                           aSize.width);
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+#define SWIZZLE_SWAP(aSrcFormat, aDstFormat)                 \
+  FORMAT_CASE(                                               \
+      aSrcFormat, aDstFormat,                                \
+      SwizzleSwap<ShouldForceOpaque(aSrcFormat, aDstFormat), \
+                  AlphaBitShift(aSrcFormat), AlphaBitShift(aDstFormat)>)
+
+#define SWIZZLE_ROW_SWAP(aSrcFormat, aDstFormat)                \
+  FORMAT_CASE_ROW(                                              \
+      aSrcFormat, aDstFormat,                                   \
+      SwizzleRowSwap<ShouldForceOpaque(aSrcFormat, aDstFormat), \
+                     AlphaBitShift(aSrcFormat), AlphaBitShift(aDstFormat)>)
+
+static void SwizzleChunkSwapRGB24(const uint8_t*& aSrc, uint8_t*& aDst,
+                                  int32_t aLength) {
+  const uint8_t* end = aSrc + 3 * aLength;
+  do {
+    uint8_t r = aSrc[0];
+    uint8_t g = aSrc[1];
+    uint8_t b = aSrc[2];
+    aDst[0] = b;
+    aDst[1] = g;
+    aDst[2] = r;
+    aSrc += 3;
+    aDst += 3;
+  } while (aSrc < end);
+}
+
+static void SwizzleRowSwapRGB24(const uint8_t* aSrc, uint8_t* aDst,
+                                int32_t aLength) {
+  SwizzleChunkSwapRGB24(aSrc, aDst, aLength);
+}
+
+static void SwizzleSwapRGB24(const uint8_t* aSrc, int32_t aSrcGap,
+                             uint8_t* aDst, int32_t aDstGap, IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    SwizzleChunkSwapRGB24(aSrc, aDst, aSize.width);
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+#define SWIZZLE_SWAP_RGB24(aSrcFormat, aDstFormat) \
+  FORMAT_CASE(aSrcFormat, aDstFormat, SwizzleSwapRGB24)
+
+#define SWIZZLE_ROW_SWAP_RGB24(aSrcFormat, aDstFormat) \
+  FORMAT_CASE_ROW(aSrcFormat, aDstFormat, SwizzleRowSwapRGB24)
+
+// Fast-path for conversions that force alpha to opaque.
+template <uint32_t aDstAShift>
+static void SwizzleChunkOpaqueUpdate(uint8_t*& aBuffer, int32_t aLength) {
+  const uint8_t* end = aBuffer + 4 * aLength;
+  do {
+    uint32_t rgba = *reinterpret_cast<const uint32_t*>(aBuffer);
+    // Just add on the alpha bits to the source.
+    rgba |= 0xFF << aDstAShift;
+    *reinterpret_cast<uint32_t*>(aBuffer) = rgba;
+    aBuffer += 4;
+  } while (aBuffer < end);
+}
+
+template <uint32_t aDstAShift>
+static void SwizzleChunkOpaqueCopy(const uint8_t*& aSrc, uint8_t* aDst,
+                                   int32_t aLength) {
+  const uint8_t* end = aSrc + 4 * aLength;
+  do {
+    uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
+    // Just add on the alpha bits to the source.
+    rgba |= 0xFF << aDstAShift;
+    *reinterpret_cast<uint32_t*>(aDst) = rgba;
+    aSrc += 4;
+    aDst += 4;
+  } while (aSrc < end);
+}
+
+template <uint32_t aDstAShift>
+static void SwizzleRowOpaque(const uint8_t* aSrc, uint8_t* aDst,
+                             int32_t aLength) {
+  if (aSrc == aDst) {
+    SwizzleChunkOpaqueUpdate<aDstAShift>(aDst, aLength);
+  } else {
+    SwizzleChunkOpaqueCopy<aDstAShift>(aSrc, aDst, aLength);
+  }
+}
+
+template <uint32_t aDstAShift>
+static void SwizzleOpaque(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
+                          int32_t aDstGap, IntSize aSize) {
+  if (aSrc == aDst) {
+    // Modifying in-place, so just write out the alpha.
+    for (int32_t height = aSize.height; height > 0; height--) {
+      SwizzleChunkOpaqueUpdate<aDstAShift>(aDst, aSize.width);
+      aDst += aDstGap;
+    }
+  } else {
+    for (int32_t height = aSize.height; height > 0; height--) {
+      SwizzleChunkOpaqueCopy<aDstAShift>(aSrc, aDst, aSize.width);
+      aSrc += aSrcGap;
+      aDst += aDstGap;
+    }
+  }
+}
+
+#define SWIZZLE_OPAQUE(aSrcFormat, aDstFormat) \
+  FORMAT_CASE(aSrcFormat, aDstFormat, SwizzleOpaque<AlphaBitShift(aDstFormat)>)
+
+#define SWIZZLE_ROW_OPAQUE(aSrcFormat, aDstFormat) \
+  FORMAT_CASE_ROW(aSrcFormat, aDstFormat,          \
+                  SwizzleRowOpaque<AlphaBitShift(aDstFormat)>)
+
+// Packing of 32-bit formats to RGB565.
+template <bool aSwapRB, uint32_t aSrcRGBShift, uint32_t aSrcRGBIndex>
+static void PackToRGB565(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
+                         int32_t aDstGap, IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    const uint8_t* end = aSrc + 4 * aSize.width;
+    do {
+      uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
+
+      // Isolate the R, G, and B components and shift to final endian-dependent
+      // locations.
+      uint16_t rgb565;
+      if (aSwapRB) {
+        rgb565 = ((rgba & (0xF8 << aSrcRGBShift)) << (8 - aSrcRGBShift)) |
+                 ((rgba & (0xFC00 << aSrcRGBShift)) >> (5 + aSrcRGBShift)) |
+                 ((rgba & (0xF80000 << aSrcRGBShift)) >> (19 + aSrcRGBShift));
+      } else {
+        rgb565 = ((rgba & (0xF8 << aSrcRGBShift)) >> (3 + aSrcRGBShift)) |
+                 ((rgba & (0xFC00 << aSrcRGBShift)) >> (5 + aSrcRGBShift)) |
+                 ((rgba & (0xF80000 << aSrcRGBShift)) >> (8 + aSrcRGBShift));
+      }
+
+      *reinterpret_cast<uint16_t*>(aDst) = rgb565;
+
+      aSrc += 4;
+      aDst += 2;
+    } while (aSrc < end);
+
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+// Packing of 32-bit formats to 24-bit formats.
+template <bool aSwapRB, uint32_t aSrcRGBShift, uint32_t aSrcRGBIndex>
+static void PackChunkToRGB24(const uint8_t*& aSrc, uint8_t*& aDst,
+                             int32_t aLength) {
+  const uint8_t* end = aSrc + 4 * aLength;
+  do {
+    uint8_t r = aSrc[aSrcRGBIndex + (aSwapRB ? 2 : 0)];
+    uint8_t g = aSrc[aSrcRGBIndex + 1];
+    uint8_t b = aSrc[aSrcRGBIndex + (aSwapRB ? 0 : 2)];
+
+    aDst[0] = r;
+    aDst[1] = g;
+    aDst[2] = b;
+
+    aSrc += 4;
+    aDst += 3;
+  } while (aSrc < end);
+}
+
+template <bool aSwapRB, uint32_t aSrcRGBShift, uint32_t aSrcRGBIndex>
+static void PackRowToRGB24(const uint8_t* aSrc, uint8_t* aDst,
+                           int32_t aLength) {
+  PackChunkToRGB24<aSwapRB, aSrcRGBShift, aSrcRGBIndex>(aSrc, aDst, aLength);
+}
+
+template <bool aSwapRB, uint32_t aSrcRGBShift, uint32_t aSrcRGBIndex>
+static void PackToRGB24(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
+                        int32_t aDstGap, IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    PackChunkToRGB24<aSwapRB, aSrcRGBShift, aSrcRGBIndex>(aSrc, aDst,
+                                                          aSize.width);
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+#define PACK_RGB_CASE(aSrcFormat, aDstFormat, aPackFunc)      \
+  FORMAT_CASE(aSrcFormat, aDstFormat,                         \
+              aPackFunc<ShouldSwapRB(aSrcFormat, aDstFormat), \
+                        RGBBitShift(aSrcFormat), RGBByteIndex(aSrcFormat)>)
+
+#define PACK_RGB(aDstFormat, aPackFunc)                         \
+  PACK_RGB_CASE(SurfaceFormat::B8G8R8A8, aDstFormat, aPackFunc) \
+  PACK_RGB_CASE(SurfaceFormat::B8G8R8X8, aDstFormat, aPackFunc) \
+  PACK_RGB_CASE(SurfaceFormat::R8G8B8A8, aDstFormat, aPackFunc) \
+  PACK_RGB_CASE(SurfaceFormat::R8G8B8X8, aDstFormat, aPackFunc) \
+  PACK_RGB_CASE(SurfaceFormat::A8R8G8B8, aDstFormat, aPackFunc) \
+  PACK_RGB_CASE(SurfaceFormat::X8R8G8B8, aDstFormat, aPackFunc)
+
+#define PACK_ROW_RGB_CASE(aSrcFormat, aDstFormat, aPackFunc)                   \
+  FORMAT_CASE_ROW(                                                             \
+      aSrcFormat, aDstFormat,                                                  \
+      aPackFunc<ShouldSwapRB(aSrcFormat, aDstFormat), RGBBitShift(aSrcFormat), \
+                RGBByteIndex(aSrcFormat)>)
+
+#define PACK_ROW_RGB(aDstFormat, aPackFunc)                         \
+  PACK_ROW_RGB_CASE(SurfaceFormat::B8G8R8A8, aDstFormat, aPackFunc) \
+  PACK_ROW_RGB_CASE(SurfaceFormat::B8G8R8X8, aDstFormat, aPackFunc) \
+  PACK_ROW_RGB_CASE(SurfaceFormat::R8G8B8A8, aDstFormat, aPackFunc) \
+  PACK_ROW_RGB_CASE(SurfaceFormat::R8G8B8X8, aDstFormat, aPackFunc) \
+  PACK_ROW_RGB_CASE(SurfaceFormat::A8R8G8B8, aDstFormat, aPackFunc) \
+  PACK_ROW_RGB_CASE(SurfaceFormat::X8R8G8B8, aDstFormat, aPackFunc)
+
+// Packing of 32-bit formats to A8.
+template <uint32_t aSrcAIndex>
+static void PackToA8(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
+                     int32_t aDstGap, IntSize aSize) {
+  for (int32_t height = aSize.height; height > 0; height--) {
+    const uint8_t* end = aSrc + 4 * aSize.width;
+    do {
+      *aDst++ = aSrc[aSrcAIndex];
+      aSrc += 4;
+    } while (aSrc < end);
+    aSrc += aSrcGap;
+    aDst += aDstGap;
+  }
+}
+
+#define PACK_ALPHA_CASE(aSrcFormat, aDstFormat, aPackFunc) \
+  FORMAT_CASE(aSrcFormat, aDstFormat, aPackFunc<AlphaByteIndex(aSrcFormat)>)
+
+#define PACK_ALPHA(aDstFormat, aPackFunc)                         \
+  PACK_ALPHA_CASE(SurfaceFormat::B8G8R8A8, aDstFormat, aPackFunc) \
+  PACK_ALPHA_CASE(SurfaceFormat::R8G8B8A8, aDstFormat, aPackFunc) \
+  PACK_ALPHA_CASE(SurfaceFormat::A8R8G8B8, aDstFormat, aPackFunc)
+
+template <bool aSwapRB>
+void UnpackRowRGB24(const uint8_t* aSrc, uint8_t* aDst, int32_t aLength) {
+  // Because we are expanding, we can only process the data back to front in
+  // case we are performing this in place.
+  const uint8_t* src = aSrc + 3 * (aLength - 1);
+  uint32_t* dst = reinterpret_cast<uint32_t*>(aDst + 4 * aLength);
+  while (src >= aSrc) {
+    uint8_t r = src[aSwapRB ? 2 : 0];
+    uint8_t g = src[1];
+    uint8_t b = src[aSwapRB ? 0 : 2];
+#if MOZ_LITTLE_ENDIAN()
+    *--dst = 0xFF000000 | (b << 16) | (g << 8) | r;
+#else
+    *--dst = 0x000000FF | (b << 8) | (g << 16) | (r << 24);
+#endif
+    src -= 3;
+  }
+}
+
+// Force instantiation of swizzle variants here.
+template void UnpackRowRGB24<false>(const uint8_t*, uint8_t*, int32_t);
+template void UnpackRowRGB24<true>(const uint8_t*, uint8_t*, int32_t);
+
+#define UNPACK_ROW_RGB(aDstFormat)       \
+  FORMAT_CASE_ROW(                       \
+      SurfaceFormat::R8G8B8, aDstFormat, \
+      UnpackRowRGB24<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
+
+static void UnpackRowRGB24_To_ARGB(const uint8_t* aSrc, uint8_t* aDst,
+                                   int32_t aLength) {
+  // Because we are expanding, we can only process the data back to front in
+  // case we are performing this in place.
+  const uint8_t* src = aSrc + 3 * (aLength - 1);
+  uint32_t* dst = reinterpret_cast<uint32_t*>(aDst + 4 * aLength);
+  while (src >= aSrc) {
+    uint8_t r = src[0];
+    uint8_t g = src[1];
+    uint8_t b = src[2];
+#if MOZ_LITTLE_ENDIAN()
+    *--dst = 0x000000FF | (r << 8) | (g << 16) | (b << 24);
+#else
+    *--dst = 0xFF000000 | (r << 24) | (g << 16) | b;
+#endif
+    src -= 3;
+  }
+}
+
+#define UNPACK_ROW_RGB_TO_ARGB(aDstFormat) \
+  FORMAT_CASE_ROW(SurfaceFormat::R8G8B8, aDstFormat, UnpackRowRGB24_To_ARGB)
+
+bool SwizzleData(const uint8_t* aSrc, int32_t aSrcStride,
+                 SurfaceFormat aSrcFormat, uint8_t* aDst, int32_t aDstStride,
+                 SurfaceFormat aDstFormat, const IntSize& aSize) {
+  if (aSize.IsEmpty()) {
+    return true;
+  }
+  IntSize size = CollapseSize(aSize, aSrcStride, aDstStride);
+  // Find gap from end of row to the start of the next row.
+  int32_t srcGap = GetStrideGap(aSize.width, aSrcFormat, aSrcStride);
+  int32_t dstGap = GetStrideGap(aSize.width, aDstFormat, aDstStride);
+  MOZ_ASSERT(srcGap >= 0 && dstGap >= 0);
+  if (srcGap < 0 || dstGap < 0) {
+    return false;
+  }
+
+#define FORMAT_CASE_CALL(...) __VA_ARGS__(aSrc, srcGap, aDst, dstGap, size)
+
+#ifdef USE_SSE2
+  if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      SWIZZLE_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_SSE2(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_SSE2(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      SWIZZLE_SSE2(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_SSE2(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+#ifdef USE_NEON
+  if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      SWIZZLE_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_NEON(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_NEON(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      SWIZZLE_NEON(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_NEON(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+  switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+    SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+    SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
+
+    SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::A8R8G8B8)
+    SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::X8R8G8B8)
+
+    SWIZZLE_FALLBACK(SurfaceFormat::A8R8G8B8, SurfaceFormat::R8G8B8A8)
+    SWIZZLE_FALLBACK(SurfaceFormat::X8R8G8B8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_FALLBACK(SurfaceFormat::A8R8G8B8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_FALLBACK(SurfaceFormat::X8R8G8B8, SurfaceFormat::R8G8B8A8)
+
+    SWIZZLE_SWAP(SurfaceFormat::B8G8R8A8, SurfaceFormat::A8R8G8B8)
+    SWIZZLE_SWAP(SurfaceFormat::B8G8R8A8, SurfaceFormat::X8R8G8B8)
+    SWIZZLE_SWAP(SurfaceFormat::B8G8R8X8, SurfaceFormat::X8R8G8B8)
+    SWIZZLE_SWAP(SurfaceFormat::B8G8R8X8, SurfaceFormat::A8R8G8B8)
+    SWIZZLE_SWAP(SurfaceFormat::A8R8G8B8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_SWAP(SurfaceFormat::A8R8G8B8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_SWAP(SurfaceFormat::X8R8G8B8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_SWAP(SurfaceFormat::X8R8G8B8, SurfaceFormat::B8G8R8A8)
+
+    SWIZZLE_SWAP_RGB24(SurfaceFormat::R8G8B8, SurfaceFormat::B8G8R8)
+    SWIZZLE_SWAP_RGB24(SurfaceFormat::B8G8R8, SurfaceFormat::R8G8B8)
+
+    SWIZZLE_OPAQUE(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_OPAQUE(SurfaceFormat::B8G8R8X8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_OPAQUE(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_OPAQUE(SurfaceFormat::R8G8B8X8, SurfaceFormat::R8G8B8A8)
+    SWIZZLE_OPAQUE(SurfaceFormat::A8R8G8B8, SurfaceFormat::X8R8G8B8)
+    SWIZZLE_OPAQUE(SurfaceFormat::X8R8G8B8, SurfaceFormat::A8R8G8B8)
+
+    PACK_RGB(SurfaceFormat::R5G6B5_UINT16, PackToRGB565)
+    PACK_RGB(SurfaceFormat::B8G8R8, PackToRGB24)
+    PACK_RGB(SurfaceFormat::R8G8B8, PackToRGB24)
+    PACK_ALPHA(SurfaceFormat::A8, PackToA8)
+
+    default:
+      break;
+  }
+
+  if (aSrcFormat == aDstFormat) {
+    // If the formats match, just do a generic copy.
+    SwizzleCopy(aSrc, srcGap, aDst, dstGap, size, BytesPerPixel(aSrcFormat));
+    return true;
+  }
+
+#undef FORMAT_CASE_CALL
+
+  MOZ_ASSERT(false, "Unsupported swizzle formats");
+  return false;
+}
+
+static bool SwizzleYFlipDataInternal(const uint8_t* aSrc, int32_t aSrcStride,
+                                     SurfaceFormat aSrcFormat, uint8_t* aDst,
+                                     int32_t aDstStride,
+                                     SurfaceFormat aDstFormat,
+                                     const IntSize& aSize,
+                                     SwizzleRowFn aSwizzleFn) {
+  if (!aSwizzleFn) {
+    return false;
+  }
+
+  // Guarantee our width and height are both greater than zero.
+  if (aSize.IsEmpty()) {
+    return true;
+  }
+
+  // Unlike SwizzleData/PremultiplyData, we don't use the stride gaps directly,
+  // but we can use it to verify that the stride is valid for our width and
+  // format.
+  int32_t srcGap = GetStrideGap(aSize.width, aSrcFormat, aSrcStride);
+  int32_t dstGap = GetStrideGap(aSize.width, aDstFormat, aDstStride);
+  MOZ_ASSERT(srcGap >= 0 && dstGap >= 0);
+  if (srcGap < 0 || dstGap < 0) {
+    return false;
+  }
+
+  // Swapping/swizzling to a new buffer is trivial.
+  if (aSrc != aDst) {
+    const uint8_t* src = aSrc;
+    const uint8_t* srcEnd = aSrc + aSize.height * aSrcStride;
+    uint8_t* dst = aDst + (aSize.height - 1) * aDstStride;
+    while (src < srcEnd) {
+      aSwizzleFn(src, dst, aSize.width);
+      src += aSrcStride;
+      dst -= aDstStride;
+    }
+    return true;
+  }
+
+  if (aSrcStride != aDstStride) {
+    return false;
+  }
+
+  // If we are swizzling in place, then we need a temporary row buffer.
+  UniquePtr<uint8_t[]> rowBuffer(new (std::nothrow) uint8_t[aDstStride]);
+  if (!rowBuffer) {
+    return false;
+  }
+
+  // Swizzle and swap the top and bottom rows until we meet in the middle.
+  int32_t middleRow = aSize.height / 2;
+  uint8_t* top = aDst;
+  uint8_t* bottom = aDst + (aSize.height - 1) * aDstStride;
+  for (int32_t row = 0; row < middleRow; ++row) {
+    memcpy(rowBuffer.get(), bottom, aDstStride);
+    aSwizzleFn(top, bottom, aSize.width);
+    aSwizzleFn(rowBuffer.get(), top, aSize.width);
+    top += aDstStride;
+    bottom -= aDstStride;
+  }
+
+  // If there is an odd numbered row, we haven't swizzled it yet.
+  if (aSize.height % 2 == 1) {
+    top = aDst + middleRow * aDstStride;
+    aSwizzleFn(top, top, aSize.width);
+  }
+  return true;
+}
+
+bool SwizzleYFlipData(const uint8_t* aSrc, int32_t aSrcStride,
+                      SurfaceFormat aSrcFormat, uint8_t* aDst,
+                      int32_t aDstStride, SurfaceFormat aDstFormat,
+                      const IntSize& aSize) {
+  return SwizzleYFlipDataInternal(aSrc, aSrcStride, aSrcFormat, aDst,
+                                  aDstStride, aDstFormat, aSize,
+                                  SwizzleRow(aSrcFormat, aDstFormat));
+}
+
+bool PremultiplyYFlipData(const uint8_t* aSrc, int32_t aSrcStride,
+                          SurfaceFormat aSrcFormat, uint8_t* aDst,
+                          int32_t aDstStride, SurfaceFormat aDstFormat,
+                          const IntSize& aSize) {
+  return SwizzleYFlipDataInternal(aSrc, aSrcStride, aSrcFormat, aDst,
+                                  aDstStride, aDstFormat, aSize,
+                                  PremultiplyRow(aSrcFormat, aDstFormat));
+}
+
+SwizzleRowFn SwizzleRow(SurfaceFormat aSrcFormat, SurfaceFormat aDstFormat) {
+#ifdef USE_SSE2
+  if (mozilla::supports_avx2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      UNPACK_ROW_RGB_AVX2(SurfaceFormat::R8G8B8X8)
+      UNPACK_ROW_RGB_AVX2(SurfaceFormat::R8G8B8A8)
+      UNPACK_ROW_RGB_AVX2(SurfaceFormat::B8G8R8X8)
+      UNPACK_ROW_RGB_AVX2(SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+
+  if (mozilla::supports_ssse3()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      UNPACK_ROW_RGB_SSSE3(SurfaceFormat::R8G8B8X8)
+      UNPACK_ROW_RGB_SSSE3(SurfaceFormat::R8G8B8A8)
+      UNPACK_ROW_RGB_SSSE3(SurfaceFormat::B8G8R8X8)
+      UNPACK_ROW_RGB_SSSE3(SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+
+  if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      SWIZZLE_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_ROW_SSE2(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_ROW_SSE2(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      SWIZZLE_ROW_SSE2(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_ROW_SSE2(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+#ifdef USE_NEON
+  if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+      UNPACK_ROW_RGB_NEON(SurfaceFormat::R8G8B8X8)
+      UNPACK_ROW_RGB_NEON(SurfaceFormat::R8G8B8A8)
+      UNPACK_ROW_RGB_NEON(SurfaceFormat::B8G8R8X8)
+      UNPACK_ROW_RGB_NEON(SurfaceFormat::B8G8R8A8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+      SWIZZLE_ROW_NEON(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
+      default:
+        break;
+    }
+#endif
+
+  switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
+
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::A8R8G8B8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::X8R8G8B8)
+
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::A8R8G8B8, SurfaceFormat::R8G8B8A8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::X8R8G8B8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::A8R8G8B8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_ROW_FALLBACK(SurfaceFormat::X8R8G8B8, SurfaceFormat::R8G8B8A8)
+
+    SWIZZLE_ROW_OPAQUE(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_ROW_OPAQUE(SurfaceFormat::B8G8R8X8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_ROW_OPAQUE(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
+    SWIZZLE_ROW_OPAQUE(SurfaceFormat::R8G8B8X8, SurfaceFormat::R8G8B8A8)
+    SWIZZLE_ROW_OPAQUE(SurfaceFormat::A8R8G8B8, SurfaceFormat::X8R8G8B8)
+    SWIZZLE_ROW_OPAQUE(SurfaceFormat::X8R8G8B8, SurfaceFormat::A8R8G8B8)
+
+    SWIZZLE_ROW_SWAP(SurfaceFormat::B8G8R8A8, SurfaceFormat::A8R8G8B8)
+    SWIZZLE_ROW_SWAP(SurfaceFormat::B8G8R8A8, SurfaceFormat::X8R8G8B8)
+    SWIZZLE_ROW_SWAP(SurfaceFormat::B8G8R8X8, SurfaceFormat::X8R8G8B8)
+    SWIZZLE_ROW_SWAP(SurfaceFormat::B8G8R8X8, SurfaceFormat::A8R8G8B8)
+    SWIZZLE_ROW_SWAP(SurfaceFormat::A8R8G8B8, SurfaceFormat::B8G8R8A8)
+    SWIZZLE_ROW_SWAP(SurfaceFormat::A8R8G8B8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_ROW_SWAP(SurfaceFormat::X8R8G8B8, SurfaceFormat::B8G8R8X8)
+    SWIZZLE_ROW_SWAP(SurfaceFormat::X8R8G8B8, SurfaceFormat::B8G8R8A8)
+
+    SWIZZLE_ROW_SWAP_RGB24(SurfaceFormat::R8G8B8, SurfaceFormat::B8G8R8)
+    SWIZZLE_ROW_SWAP_RGB24(SurfaceFormat::B8G8R8, SurfaceFormat::R8G8B8)
+
+    UNPACK_ROW_RGB(SurfaceFormat::R8G8B8X8)
+    UNPACK_ROW_RGB(SurfaceFormat::R8G8B8A8)
+    UNPACK_ROW_RGB(SurfaceFormat::B8G8R8X8)
+    UNPACK_ROW_RGB(SurfaceFormat::B8G8R8A8)
+    UNPACK_ROW_RGB_TO_ARGB(SurfaceFormat::A8R8G8B8)
+    UNPACK_ROW_RGB_TO_ARGB(SurfaceFormat::X8R8G8B8)
+
+    PACK_ROW_RGB(SurfaceFormat::R8G8B8, PackRowToRGB24)
+    PACK_ROW_RGB(SurfaceFormat::B8G8R8, PackRowToRGB24)
+
+    default:
+      break;
+  }
+
+  if (aSrcFormat == aDstFormat) {
+    switch (BytesPerPixel(aSrcFormat)) {
+      case 4:
+        return &SwizzleRowCopy<4>;
+      case 3:
+        return &SwizzleRowCopy<3>;
+      default:
+        break;
+    }
+  }
+
+  MOZ_ASSERT_UNREACHABLE("Unsupported swizzle formats");
+  return nullptr;
+}
+
+static IntRect ReorientRowRotate0FlipFallback(const uint8_t* aSrc,
+                                              int32_t aSrcRow, uint8_t* aDst,
+                                              const IntSize& aDstSize,
+                                              int32_t aDstStride) {
+  // Reverse order of pixels in the row.
+  const uint32_t* src = reinterpret_cast<const uint32_t*>(aSrc);
+  const uint32_t* end = src + aDstSize.width;
+  uint32_t* dst = reinterpret_cast<uint32_t*>(aDst + aSrcRow * aDstStride) +
+                  aDstSize.width - 1;
+  do {
+    *dst-- = *src++;
+  } while (src < end);
+
+  return IntRect(0, aSrcRow, aDstSize.width, 1);
+}
+
+static IntRect ReorientRowRotate90FlipFallback(const uint8_t* aSrc,
+                                               int32_t aSrcRow, uint8_t* aDst,
+                                               const IntSize& aDstSize,
+                                               int32_t aDstStride) {
+  // Copy row of pixels from top to bottom, into left to right columns.
+  const uint32_t* src = reinterpret_cast<const uint32_t*>(aSrc);
+  const uint32_t* end = src + aDstSize.height;
+  uint32_t* dst = reinterpret_cast<uint32_t*>(aDst) + aSrcRow;
+  int32_t stride = aDstStride / sizeof(uint32_t);
+  do {
+    *dst = *src++;
+    dst += stride;
+  } while (src < end);
+
+  return IntRect(aSrcRow, 0, 1, aDstSize.height);
+}
+
+static IntRect ReorientRowRotate180FlipFallback(const uint8_t* aSrc,
+                                                int32_t aSrcRow, uint8_t* aDst,
+                                                const IntSize& aDstSize,
+                                                int32_t aDstStride) {
+  // Copy row of pixels from top to bottom, into bottom to top rows.
+  uint8_t* dst = aDst + (aDstSize.height - aSrcRow - 1) * aDstStride;
+  memcpy(dst, aSrc, aDstSize.width * sizeof(uint32_t));
+  return IntRect(0, aDstSize.height - aSrcRow - 1, aDstSize.width, 1);
+}
+
+static IntRect ReorientRowRotate270FlipFallback(const uint8_t* aSrc,
+                                                int32_t aSrcRow, uint8_t* aDst,
+                                                const IntSize& aDstSize,
+                                                int32_t aDstStride) {
+  // Copy row of pixels in reverse order from top to bottom, into right to left
+  // columns.
+  const uint32_t* src = reinterpret_cast<const uint32_t*>(aSrc);
+  const uint32_t* end = src + aDstSize.height;
+  uint32_t* dst =
+      reinterpret_cast<uint32_t*>(aDst + (aDstSize.height - 1) * aDstStride) +
+      aDstSize.width - aSrcRow - 1;
+  int32_t stride = aDstStride / sizeof(uint32_t);
+  do {
+    *dst = *src++;
+    dst -= stride;
+  } while (src < end);
+
+  return IntRect(aDstSize.width - aSrcRow - 1, 0, 1, aDstSize.height);
+}
+
+static IntRect ReorientRowRotate0Fallback(const uint8_t* aSrc, int32_t aSrcRow,
+                                          uint8_t* aDst,
+                                          const IntSize& aDstSize,
+                                          int32_t aDstStride) {
+  // Copy row of pixels into the destination.
+  uint8_t* dst = aDst + aSrcRow * aDstStride;
+  memcpy(dst, aSrc, aDstSize.width * sizeof(uint32_t));
+  return IntRect(0, aSrcRow, aDstSize.width, 1);
+}
+
+static IntRect ReorientRowRotate90Fallback(const uint8_t* aSrc, int32_t aSrcRow,
+                                           uint8_t* aDst,
+                                           const IntSize& aDstSize,
+                                           int32_t aDstStride) {
+  // Copy row of pixels from top to bottom, into right to left columns.
+  const uint32_t* src = reinterpret_cast<const uint32_t*>(aSrc);
+  const uint32_t* end = src + aDstSize.height;
+  uint32_t* dst =
+      reinterpret_cast<uint32_t*>(aDst) + aDstSize.width - aSrcRow - 1;
+  int32_t stride = aDstStride / sizeof(uint32_t);
+  do {
+    *dst = *src++;
+    dst += stride;
+  } while (src < end);
+
+  return IntRect(aDstSize.width - aSrcRow - 1, 0, 1, aDstSize.height);
+}
+
+static IntRect ReorientRowRotate180Fallback(const uint8_t* aSrc,
+                                            int32_t aSrcRow, uint8_t* aDst,
+                                            const IntSize& aDstSize,
+                                            int32_t aDstStride) {
+  // Copy row of pixels in reverse order from top to bottom, into bottom to top
+  // rows.
+  const uint32_t* src = reinterpret_cast<const uint32_t*>(aSrc);
+  const uint32_t* end = src + aDstSize.width;
+  uint32_t* dst = reinterpret_cast<uint32_t*>(
+                      aDst + (aDstSize.height - aSrcRow - 1) * aDstStride) +
+                  aDstSize.width - 1;
+  do {
+    *dst-- = *src++;
+  } while (src < end);
+
+  return IntRect(0, aDstSize.height - aSrcRow - 1, aDstSize.width, 1);
+}
+
+static IntRect ReorientRowRotate270Fallback(const uint8_t* aSrc,
+                                            int32_t aSrcRow, uint8_t* aDst,
+                                            const IntSize& aDstSize,
+                                            int32_t aDstStride) {
+  // Copy row of pixels in reverse order from top to bottom, into left to right
+  // column.
+  const uint32_t* src = reinterpret_cast<const uint32_t*>(aSrc);
+  const uint32_t* end = src + aDstSize.height;
+  uint32_t* dst =
+      reinterpret_cast<uint32_t*>(aDst + (aDstSize.height - 1) * aDstStride) +
+      aSrcRow;
+  int32_t stride = aDstStride / sizeof(uint32_t);
+  do {
+    *dst = *src++;
+    dst -= stride;
+  } while (src < end);
+
+  return IntRect(aSrcRow, 0, 1, aDstSize.height);
+}
+
+ReorientRowFn ReorientRow(const struct image::Orientation& aOrientation) {
+  switch (aOrientation.flip) {
+    case image::Flip::Unflipped:
+      switch (aOrientation.rotation) {
+        case image::Angle::D0:
+          return &ReorientRowRotate0Fallback;
+        case image::Angle::D90:
+          return &ReorientRowRotate90Fallback;
+        case image::Angle::D180:
+          return &ReorientRowRotate180Fallback;
+        case image::Angle::D270:
+          return &ReorientRowRotate270Fallback;
+        default:
+          break;
+      }
+      break;
+    case image::Flip::Horizontal:
+      switch (aOrientation.rotation) {
+        case image::Angle::D0:
+          return &ReorientRowRotate0FlipFallback;
+        case image::Angle::D90:
+          if (aOrientation.flipFirst) {
+            return &ReorientRowRotate270FlipFallback;
+          } else {
+            return &ReorientRowRotate90FlipFallback;
+          }
+        case image::Angle::D180:
+          return &ReorientRowRotate180FlipFallback;
+        case image::Angle::D270:
+          if (aOrientation.flipFirst) {
+            return &ReorientRowRotate90FlipFallback;
+          } else {
+            return &ReorientRowRotate270FlipFallback;
+          }
+        default:
+          break;
+      }
+      break;
+    default:
+      break;
+  }
+
+  MOZ_ASSERT_UNREACHABLE("Unhandled orientation!");
+  return nullptr;
+}
+
+}  // namespace gfx
+}  // namespace mozilla