Add m-esr52 at 52.6.0

1 files changed, 261 insertions, 0 deletions

diff --git a/gfx/layers/ImageDataSerializer.cpp b/gfx/layers/ImageDataSerializer.cpp
new file mode 100644
index 000000000..08ed83bd9
--- /dev/null
+++ b/gfx/layers/ImageDataSerializer.cpp
@@ -0,0 +1,261 @@
+/* -*- 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/. */
+
+#include "ImageDataSerializer.h"
+#include "gfx2DGlue.h"                  // for SurfaceFormatToImageFormat
+#include "mozilla/gfx/Point.h"          // for IntSize
+#include "mozilla/Assertions.h"         // for MOZ_ASSERT, etc
+#include "mozilla/gfx/2D.h"             // for DataSourceSurface, Factory
+#include "mozilla/gfx/Logging.h"        // for gfxDebug
+#include "mozilla/gfx/Tools.h"          // for GetAlignedStride, etc
+#include "mozilla/gfx/Types.h"
+#include "mozilla/mozalloc.h"           // for operator delete, etc
+#include "YCbCrUtils.h"                 // for YCbCr conversions
+
+namespace mozilla {
+namespace layers {
+namespace ImageDataSerializer {
+
+using namespace gfx;
+
+int32_t
+ComputeRGBStride(SurfaceFormat aFormat, int32_t aWidth)
+{
+  return GetAlignedStride<4>(aWidth, BytesPerPixel(aFormat));
+}
+
+int32_t
+GetRGBStride(const RGBDescriptor& aDescriptor)
+{
+  return ComputeRGBStride(aDescriptor.format(), aDescriptor.size().width);
+}
+
+uint32_t
+ComputeRGBBufferSize(IntSize aSize, SurfaceFormat aFormat)
+{
+  MOZ_ASSERT(aSize.height >= 0 && aSize.width >= 0);
+
+  // This takes care of checking whether there could be overflow
+  // with enough margin for the metadata.
+  if (!gfx::Factory::AllowedSurfaceSize(aSize)) {
+    return 0;
+  }
+
+  // Note we're passing height instad of the bpp parameter, but the end
+  // result is the same - and the bpp was already taken care of in the
+  // ComputeRGBStride function.
+  int32_t bufsize = GetAlignedStride<16>(ComputeRGBStride(aFormat, aSize.width),
+                                         aSize.height);
+
+  if (bufsize < 0) {
+    // This should not be possible thanks to Factory::AllowedSurfaceSize
+    return 0;
+  }
+
+  return bufsize;
+}
+
+
+
+// Minimum required shmem size in bytes
+uint32_t
+ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, int32_t aYStride,
+                       const gfx::IntSize& aCbCrSize, int32_t aCbCrStride)
+{
+  MOZ_ASSERT(aYSize.height >= 0 && aYSize.width >= 0);
+
+  if (aYSize.height < 0 || aYSize.width < 0 || aCbCrSize.height < 0 || aCbCrSize.width < 0 ||
+      !gfx::Factory::AllowedSurfaceSize(IntSize(aYStride, aYSize.height)) ||
+      !gfx::Factory::AllowedSurfaceSize(IntSize(aCbCrStride, aCbCrSize.height))) {
+    return 0;
+  }
+  // Overflow checks are performed in AllowedSurfaceSize
+  return GetAlignedStride<4>(aYSize.height, aYStride) +
+         2 * GetAlignedStride<4>(aCbCrSize.height, aCbCrStride);
+}
+
+// Minimum required shmem size in bytes
+uint32_t
+ComputeYCbCrBufferSize(const gfx::IntSize& aYSize, const gfx::IntSize& aCbCrSize)
+{
+  return ComputeYCbCrBufferSize(aYSize, aYSize.width, aCbCrSize, aCbCrSize.width);
+}
+
+uint32_t
+ComputeYCbCrBufferSize(uint32_t aBufferSize)
+{
+  return GetAlignedStride<4>(aBufferSize, 1);
+}
+
+void ComputeYCbCrOffsets(int32_t yStride, int32_t yHeight,
+                         int32_t cbCrStride, int32_t cbCrHeight,
+                         uint32_t& outYOffset, uint32_t& outCbOffset,
+                         uint32_t& outCrOffset)
+{
+  outYOffset = 0;
+  outCbOffset = outYOffset + GetAlignedStride<4>(yStride, yHeight);
+  outCrOffset = outCbOffset + GetAlignedStride<4>(cbCrStride, cbCrHeight);
+}
+
+gfx::SurfaceFormat FormatFromBufferDescriptor(const BufferDescriptor& aDescriptor)
+{
+  switch (aDescriptor.type()) {
+    case BufferDescriptor::TRGBDescriptor:
+      return aDescriptor.get_RGBDescriptor().format();
+    case BufferDescriptor::TYCbCrDescriptor:
+      return gfx::SurfaceFormat::YUV;
+    default:
+      MOZ_CRASH("GFX: FormatFromBufferDescriptor");
+  }
+}
+
+gfx::IntSize SizeFromBufferDescriptor(const BufferDescriptor& aDescriptor)
+{
+  switch (aDescriptor.type()) {
+    case BufferDescriptor::TRGBDescriptor:
+      return aDescriptor.get_RGBDescriptor().size();
+    case BufferDescriptor::TYCbCrDescriptor:
+      return aDescriptor.get_YCbCrDescriptor().ySize();
+    default:
+      MOZ_CRASH("GFX: SizeFromBufferDescriptor");
+  }
+}
+
+Maybe<gfx::IntSize> CbCrSizeFromBufferDescriptor(const BufferDescriptor& aDescriptor)
+{
+  switch (aDescriptor.type()) {
+    case BufferDescriptor::TRGBDescriptor:
+      return Nothing();
+    case BufferDescriptor::TYCbCrDescriptor:
+      return Some(aDescriptor.get_YCbCrDescriptor().cbCrSize());
+    default:
+      MOZ_CRASH("GFX:  CbCrSizeFromBufferDescriptor");
+  }
+}
+
+Maybe<YUVColorSpace> YUVColorSpaceFromBufferDescriptor(const BufferDescriptor& aDescriptor)
+{
+{
+  switch (aDescriptor.type()) {
+    case BufferDescriptor::TRGBDescriptor:
+      return Nothing();
+    case BufferDescriptor::TYCbCrDescriptor:
+      return Some(aDescriptor.get_YCbCrDescriptor().yUVColorSpace());
+    default:
+      MOZ_CRASH("GFX:  CbCrSizeFromBufferDescriptor");
+  }
+}
+}
+
+Maybe<StereoMode> StereoModeFromBufferDescriptor(const BufferDescriptor& aDescriptor)
+{
+  switch (aDescriptor.type()) {
+    case BufferDescriptor::TRGBDescriptor:
+      return Nothing();
+    case BufferDescriptor::TYCbCrDescriptor:
+      return Some(aDescriptor.get_YCbCrDescriptor().stereoMode());
+    default:
+      MOZ_CRASH("GFX:  CbCrSizeFromBufferDescriptor");
+  }
+}
+
+uint8_t* GetYChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor)
+{
+  return aBuffer + aDescriptor.yOffset();
+}
+
+uint8_t* GetCbChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor)
+{
+  return aBuffer + aDescriptor.cbOffset();
+}
+
+uint8_t* GetCrChannel(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor)
+{
+  return aBuffer + aDescriptor.crOffset();
+}
+
+already_AddRefed<DataSourceSurface>
+DataSourceSurfaceFromYCbCrDescriptor(uint8_t* aBuffer, const YCbCrDescriptor& aDescriptor, gfx::DataSourceSurface* aSurface)
+{
+  gfx::IntSize ySize = aDescriptor.ySize();
+  gfx::IntSize cbCrSize = aDescriptor.cbCrSize();
+  int32_t yStride = ySize.width;
+  int32_t cbCrStride = cbCrSize.width;
+
+  RefPtr<DataSourceSurface> result;
+  if (aSurface) {
+    MOZ_ASSERT(aSurface->GetSize() == ySize);
+    MOZ_ASSERT(aSurface->GetFormat() == gfx::SurfaceFormat::B8G8R8X8);
+    if (aSurface->GetSize() == ySize &&
+        aSurface->GetFormat() == gfx::SurfaceFormat::B8G8R8X8) {
+      result = aSurface;
+    }
+  }
+
+  if (!result) {
+    result =
+      Factory::CreateDataSourceSurface(ySize, gfx::SurfaceFormat::B8G8R8X8);
+  }
+  if (NS_WARN_IF(!result)) {
+    return nullptr;
+  }
+
+  DataSourceSurface::MappedSurface map;
+  if (NS_WARN_IF(!result->Map(DataSourceSurface::MapType::WRITE, &map))) {
+    return nullptr;
+  }
+
+  layers::PlanarYCbCrData ycbcrData;
+  ycbcrData.mYChannel     = GetYChannel(aBuffer, aDescriptor);
+  ycbcrData.mYStride      = yStride;
+  ycbcrData.mYSize        = ySize;
+  ycbcrData.mCbChannel    = GetCbChannel(aBuffer, aDescriptor);
+  ycbcrData.mCrChannel    = GetCrChannel(aBuffer, aDescriptor);
+  ycbcrData.mCbCrStride   = cbCrStride;
+  ycbcrData.mCbCrSize     = cbCrSize;
+  ycbcrData.mPicSize      = ySize;
+  ycbcrData.mYUVColorSpace = aDescriptor.yUVColorSpace();
+
+  gfx::ConvertYCbCrToRGB(ycbcrData,
+                         gfx::SurfaceFormat::B8G8R8X8,
+                         ySize,
+                         map.mData,
+                         map.mStride);
+
+  result->Unmap();
+  return result.forget();
+}
+
+void
+ConvertAndScaleFromYCbCrDescriptor(uint8_t* aBuffer,
+                                   const YCbCrDescriptor& aDescriptor,
+                                   const gfx::SurfaceFormat& aDestFormat,
+                                   const gfx::IntSize& aDestSize,
+                                   unsigned char* aDestBuffer,
+                                   int32_t aStride)
+{
+  MOZ_ASSERT(aBuffer);
+  gfx::IntSize ySize = aDescriptor.ySize();
+  gfx::IntSize cbCrSize = aDescriptor.cbCrSize();
+  int32_t yStride = ySize.width;
+  int32_t cbCrStride = cbCrSize.width;
+
+  layers::PlanarYCbCrData ycbcrData;
+  ycbcrData.mYChannel     = GetYChannel(aBuffer, aDescriptor);
+  ycbcrData.mYStride      = yStride;
+  ycbcrData.mYSize        = ySize;
+  ycbcrData.mCbChannel    = GetCbChannel(aBuffer, aDescriptor);
+  ycbcrData.mCrChannel    = GetCrChannel(aBuffer, aDescriptor);
+  ycbcrData.mCbCrStride   = cbCrStride;
+  ycbcrData.mCbCrSize     = cbCrSize;
+  ycbcrData.mPicSize      = ySize;
+  ycbcrData.mYUVColorSpace = aDescriptor.yUVColorSpace();
+
+  gfx::ConvertYCbCrToRGB(ycbcrData, aDestFormat, aDestSize, aDestBuffer, aStride);
+}
+
+} // namespace ImageDataSerializer
+} // namespace layers
+} // namespace mozilla