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/* 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()
{
NS_ASSERTION(NS_IsMainThread(), "Must be main thread");
if (mSourceSurface) {
RefPtr<gfx::SourceSurface> surface(mSourceSurface);
return surface.forget();
}
RefPtr<gfx::SourceSurface> surface;
{
// We are 'borrowing' the DrawTarget and retaining a permanent reference to
// the underlying data (via the surface). It is in this instance since we
// know that the TextureClient is always wrapping a BufferTextureData and
// therefore it won't go away underneath us.
BufferTextureData* decoded_buffer =
mTextureClient->GetInternalData()->AsBufferTextureData();
RefPtr<gfx::DrawTarget> drawTarget = decoded_buffer->BorrowDrawTarget();
if (!drawTarget) {
return nullptr;
}
surface = drawTarget->Snapshot();
}
mSourceSurface = surface;
return surface.forget();
}
} // namespace layers
} // namespace mozilla
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