1 files changed, 113 insertions, 0 deletions
diff --git a/gfx/layers/ipc/SharedRGBImage.cpp b/gfx/layers/ipc/SharedRGBImage.cpp
new file mode 100644
index 000000000..bb3bb968c
--- /dev/null
+++ b/gfx/layers/ipc/SharedRGBImage.cpp
@@ -0,0 +1,113 @@
+/* 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/gfx/Point.h"          // for IntSIze
+#include "mozilla/layers/BufferTexture.h"
+#include "mozilla/layers/ISurfaceAllocator.h"  // for ISurfaceAllocator, etc
+#include "mozilla/layers/ImageClient.h"  // for ImageClient
+#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 "nsDebug.h"                    // for NS_WARNING, NS_ASSERTION
+#include "nsISupportsImpl.h"            // for Image::AddRef, etc
+#include "nsRect.h"                     // for mozilla::gfx::IntRect
+
+// 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,
+                     gfx::IntSize aSize,
+                     gfxImageFormat aImageFormat)
+{
+  NS_ASSERTION(aImageFormat == gfx::SurfaceFormat::A8R8G8B8_UINT32 ||
+               aImageFormat == gfx::SurfaceFormat::X8R8G8B8_UINT32 ||
+               aImageFormat == gfx::SurfaceFormat::R5G6B5_UINT16,
+               "RGB formats supported only");
+
+  if (!aImageContainer) {
+    NS_WARNING("No ImageContainer to allocate SharedRGBImage");
+    return nullptr;
+  }
+
+  RefPtr<SharedRGBImage> rgbImage = aImageContainer->CreateSharedRGBImage();
+  if (!rgbImage) {
+    NS_WARNING("Failed to create SharedRGBImage");
+    return nullptr;
+  }
+  if (!rgbImage->Allocate(aSize, gfx::ImageFormatToSurfaceFormat(aImageFormat))) {
+    NS_WARNING("Failed to allocate a shared image");
+    return nullptr;
+  }
+  return rgbImage.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()) {
+    ADDREF_MANUALLY(mTextureClient);
+    ImageBridgeChild::DispatchReleaseTextureClient(mTextureClient);
+    mTextureClient = nullptr;
+  }
+}
+
+bool
+SharedRGBImage::Allocate(gfx::IntSize aSize, gfx::SurfaceFormat aFormat)
+{
+  mSize = aSize;
+  mTextureClient = mCompositable->CreateBufferTextureClient(aFormat, aSize,
+                                                            gfx::BackendType::NONE,
+                                                            TextureFlags::DEFAULT);
+  return !!mTextureClient;
+}
+
+uint8_t*
+SharedRGBImage::GetBuffer()
+{
+  MappedTextureData mapped;
+  if (mTextureClient && mTextureClient->BorrowMappedData(mapped)) {
+    return mapped.data;
+  }
+  return 0;
+}
+
+gfx::IntSize
+SharedRGBImage::GetSize()
+{
+  return mSize;
+}
+
+TextureClient*
+SharedRGBImage::GetTextureClient(KnowsCompositor* aForwarder)
+{
+  return mTextureClient.get();
+}
+
+already_AddRefed<gfx::SourceSurface>
+SharedRGBImage::GetAsSourceSurface()
+{
+  return nullptr;
+}
+
+} // namespace layers
+} // namespace mozilla