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/* -*- 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 "SharedRGBImage.h"
#include "ImageTypes.h" // for ImageFormat::SHARED_RGB, etc
#include "mozilla/ipc/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/TextureClientRecycleAllocator.h" // for ITextureClientAllocationHelper
#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 "nsProxyRelease.h"
#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 {
class TextureClientForRawBufferAccessAllocationHelper
: public ITextureClientAllocationHelper {
public:
TextureClientForRawBufferAccessAllocationHelper(gfx::SurfaceFormat aFormat,
gfx::IntSize aSize,
TextureFlags aTextureFlags)
: ITextureClientAllocationHelper(aFormat, aSize, BackendSelector::Content,
aTextureFlags, ALLOC_DEFAULT) {}
bool IsCompatible(TextureClient* aTextureClient) override {
bool ret = aTextureClient->GetFormat() == mFormat &&
aTextureClient->GetSize() == mSize;
return ret;
}
already_AddRefed<TextureClient> Allocate(
KnowsCompositor* aAllocator) override {
return TextureClient::CreateForRawBufferAccess(
aAllocator, mFormat, mSize, gfx::BackendType::NONE, mTextureFlags);
}
};
SharedRGBImage::SharedRGBImage(ImageClient* aCompositable)
: Image(nullptr, ImageFormat::SHARED_RGB), mCompositable(aCompositable) {
MOZ_COUNT_CTOR(SharedRGBImage);
}
SharedRGBImage::SharedRGBImage(TextureClientRecycleAllocator* aRecycleAllocator)
: Image(nullptr, ImageFormat::SHARED_RGB),
mRecycleAllocator(aRecycleAllocator) {
MOZ_COUNT_CTOR(SharedRGBImage);
}
SharedRGBImage::~SharedRGBImage() {
MOZ_COUNT_DTOR(SharedRGBImage);
NS_ReleaseOnMainThread("SharedRGBImage::mSourceSurface",
mSourceSurface.forget());
}
TextureClientRecycleAllocator* SharedRGBImage::RecycleAllocator() {
static const uint32_t MAX_POOLED_VIDEO_COUNT = 5;
if (!mRecycleAllocator && mCompositable) {
if (!mCompositable->HasTextureClientRecycler()) {
// Initialize TextureClientRecycler
mCompositable->GetTextureClientRecycler()->SetMaxPoolSize(
MAX_POOLED_VIDEO_COUNT);
}
mRecycleAllocator = mCompositable->GetTextureClientRecycler();
}
return mRecycleAllocator;
}
bool SharedRGBImage::Allocate(gfx::IntSize aSize, gfx::SurfaceFormat aFormat) {
mSize = aSize;
TextureFlags flags =
mCompositable ? mCompositable->GetTextureFlags() : TextureFlags::DEFAULT;
{
TextureClientForRawBufferAccessAllocationHelper helper(aFormat, aSize,
flags);
mTextureClient =
RecycleAllocator()->CreateOrRecycle(helper).unwrapOr(nullptr);
}
return !!mTextureClient;
}
gfx::IntSize SharedRGBImage::GetSize() const { return mSize; }
TextureClient* SharedRGBImage::GetTextureClient(
KnowsCompositor* aKnowsCompositor) {
return mTextureClient.get();
}
static void ReleaseTextureClient(void* aData) {
RELEASE_MANUALLY(static_cast<TextureClient*>(aData));
}
static gfx::UserDataKey sTextureClientKey;
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();
if (!surface) {
return nullptr;
}
// The surface may outlive the owning TextureClient. So, we need to ensure
// that the surface keeps the TextureClient alive via a reference held in
// user data. The TextureClient's DrawTarget only has a weak reference to
// the surface, so we won't create any cycles by just referencing the
// TextureClient.
if (!surface->GetUserData(&sTextureClientKey)) {
surface->AddUserData(&sTextureClientKey, mTextureClient,
ReleaseTextureClient);
ADDREF_MANUALLY(mTextureClient);
}
}
mSourceSurface = surface;
return surface.forget();
}
} // namespace layers
} // namespace mozilla
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