diff -r 000000000000 -r 6474c204b198 gfx/layers/ipc/SharedRGBImage.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/layers/ipc/SharedRGBImage.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,123 @@
+/* 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 "SharedRGBImage.h"
+#include "ImageTypes.h"                 // for ImageFormat::SHARED_RGB, etc
+#include "Shmem.h"                      // for Shmem
+#include "gfx2DGlue.h"                  // for ImageFormatToSurfaceFormat, etc
+#include "gfxPlatform.h"                // for gfxPlatform, gfxImageFormat
+#include "mozilla/layers/ISurfaceAllocator.h"  // for ISurfaceAllocator, etc
+#include "mozilla/layers/ImageClient.h"  // for ImageClient
+#include "mozilla/layers/ImageDataSerializer.h"  // for ImageDataSerializer
+#include "mozilla/layers/LayersSurfaces.h"  // for SurfaceDescriptor, etc
+#include "mozilla/layers/TextureClient.h"  // for BufferTextureClient, etc
+#include "mozilla/layers/ImageBridgeChild.h"  // for ImageBridgeChild
+#include "mozilla/mozalloc.h"           // for operator delete, etc
+#include "nsAutoPtr.h"                  // for nsRefPtr
+#include "nsDebug.h"                    // for NS_WARNING, NS_ASSERTION
+#include "nsISupportsImpl.h"            // for Image::AddRef, etc
+#include "nsRect.h"                     // for nsIntRect
+#include "nsSize.h"                     // for nsIntSize
+
+// Just big enough for a 1080p RGBA32 frame
+#define MAX_FRAME_SIZE (16 * 1024 * 1024)
+
+namespace mozilla {
+namespace layers {
+
+already_AddRefed<Image>
+CreateSharedRGBImage(ImageContainer *aImageContainer,
+                     nsIntSize aSize,
+                     gfxImageFormat aImageFormat)
+{
+  NS_ASSERTION(aImageFormat == gfxImageFormat::ARGB32 ||
+               aImageFormat == gfxImageFormat::RGB24 ||
+               aImageFormat == gfxImageFormat::RGB16_565,
+               "RGB formats supported only");
+
+  if (!aImageContainer) {
+    NS_WARNING("No ImageContainer to allocate SharedRGBImage");
+    return nullptr;
+  }
+
+  nsRefPtr<Image> image = aImageContainer->CreateImage(ImageFormat::SHARED_RGB);
+
+  if (!image) {
+    NS_WARNING("Failed to create SharedRGBImage");
+    return nullptr;
+  }
+
+  nsRefPtr<SharedRGBImage> rgbImage = static_cast<SharedRGBImage*>(image.get());
+  if (!rgbImage->Allocate(gfx::ToIntSize(aSize),
+                          gfx::ImageFormatToSurfaceFormat(aImageFormat))) {
+    NS_WARNING("Failed to allocate a shared image");
+    return nullptr;
+  }
+  return image.forget();
+}
+
+SharedRGBImage::SharedRGBImage(ImageClient* aCompositable)
+: Image(nullptr, ImageFormat::SHARED_RGB)
+, mCompositable(aCompositable)
+{
+  MOZ_COUNT_CTOR(SharedRGBImage);
+}
+
+SharedRGBImage::~SharedRGBImage()
+{
+  MOZ_COUNT_DTOR(SharedRGBImage);
+
+  if (mCompositable->GetAsyncID() != 0 &&
+      !InImageBridgeChildThread()) {
+    ImageBridgeChild::DispatchReleaseTextureClient(mTextureClient.forget().drop());
+    ImageBridgeChild::DispatchReleaseImageClient(mCompositable.forget().drop());
+  }
+}
+
+bool
+SharedRGBImage::Allocate(gfx::IntSize aSize, gfx::SurfaceFormat aFormat)
+{
+  mSize = aSize;
+  mTextureClient = mCompositable->CreateBufferTextureClient(aFormat);
+  return mTextureClient->AllocateForSurface(aSize);
+}
+
+uint8_t*
+SharedRGBImage::GetBuffer()
+{
+  if (!mTextureClient) {
+    return nullptr;
+  }
+
+  ImageDataSerializer serializer(mTextureClient->GetBuffer(), mTextureClient->GetBufferSize());
+  return serializer.GetData();
+}
+
+gfx::IntSize
+SharedRGBImage::GetSize()
+{
+  return mSize;
+}
+
+size_t
+SharedRGBImage::GetBufferSize()
+{
+  return mTextureClient ? mTextureClient->GetBufferSize()
+                        : 0;
+}
+
+TextureClient*
+SharedRGBImage::GetTextureClient(CompositableClient* aClient)
+{
+  return mTextureClient.get();
+}
+
+TemporaryRef<gfx::SourceSurface>
+SharedRGBImage::GetAsSourceSurface()
+{
+  return nullptr;
+}
+
+} // namespace layers
+} // namespace mozilla