C++ GetForwarder函数代码示例

void
ContentClientDoubleBuffered::Updated(const nsIntRegion& aRegionToDraw,
                                     const nsIntRegion& aVisibleRegion,
                                     bool aDidSelfCopy)
{
  ContentClientRemoteBuffer::Updated(aRegionToDraw, aVisibleRegion, aDidSelfCopy);

#if defined(MOZ_WIDGET_GONK) && ANDROID_VERSION >= 17
  if (mFrontClient) {
    // remove old buffer from CompositableHost
    RefPtr<AsyncTransactionWaiter> waiter = new AsyncTransactionWaiter();
    RefPtr<AsyncTransactionTracker> tracker =
        new RemoveTextureFromCompositableTracker(waiter);
    // Hold TextureClient until transaction complete.
    tracker->SetTextureClient(mFrontClient);
    mFrontClient->SetRemoveFromCompositableWaiter(waiter);
    // RemoveTextureFromCompositableAsync() expects CompositorChild's presence.
    GetForwarder()->RemoveTextureFromCompositableAsync(tracker, this, mFrontClient);
  }

  if (mFrontClientOnWhite) {
    // remove old buffer from CompositableHost
    RefPtr<AsyncTransactionWaiter> waiter = new AsyncTransactionWaiter();
    RefPtr<AsyncTransactionTracker> tracker =
        new RemoveTextureFromCompositableTracker(waiter);
    // Hold TextureClient until transaction complete.
    tracker->SetTextureClient(mFrontClientOnWhite);
    mFrontClientOnWhite->SetRemoveFromCompositableWaiter(waiter);
    // RemoveTextureFromCompositableAsync() expects CompositorChild's presence.
    GetForwarder()->RemoveTextureFromCompositableAsync(tracker, this, mFrontClientOnWhite);
  }
#endif
}

TemporaryRef<TextureClient>
CompositableClient::CreateTextureClientForDrawing(SurfaceFormat aFormat,
                                                  TextureFlags aTextureFlags)
{
  RefPtr<TextureClient> result;

#ifdef XP_WIN
  LayersBackend parentBackend = GetForwarder()->GetCompositorBackendType();
  if (parentBackend == LAYERS_D3D11 && gfxWindowsPlatform::GetPlatform()->GetD2DDevice() &&
      !(aTextureFlags & TEXTURE_ALLOC_FALLBACK)) {
    result = new TextureClientD3D11(aFormat, aTextureFlags);
  }
  if (parentBackend == LAYERS_D3D9 &&
      !GetForwarder()->ForwardsToDifferentProcess() &&
      !(aTextureFlags & TEXTURE_ALLOC_FALLBACK)) {
    // non-DIB textures don't work with alpha, see notes in TextureD3D9.
    if (ContentForFormat(aFormat) != GFX_CONTENT_COLOR) {
      result = new DIBTextureClientD3D9(aFormat, aTextureFlags);
    } else {
      result = new CairoTextureClientD3D9(aFormat, aTextureFlags);
    }
  }
#endif
  // Can't do any better than a buffer texture client.
  if (!result) {
    result = CreateBufferTextureClient(aFormat, aTextureFlags);
  }

  MOZ_ASSERT(!result || result->AsTextureClientDrawTarget(),
             "Not a TextureClientDrawTarget?");
  return result;
}

void
CanvasClientSharedSurface::Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer)
{
  if (mFront) {
    mPrevFront = mFront;
    mFront = nullptr;
  }

  auto gl = aLayer->mGLContext;
  gl->MakeCurrent();

  if (aLayer->mGLFrontbuffer) {
    mFront = CloneSurface(aLayer->mGLFrontbuffer.get(), aLayer->mFactory.get());
    if (mFront)
      mFront->Surf()->Fence();
  } else {
    mFront = gl->Screen()->Front();
    if (!mFront)
      return;
  }
  MOZ_ASSERT(mFront);

  // Alright, now sort out the IPC goop.
  SharedSurface* surf = mFront->Surf();
  auto forwarder = GetForwarder();
  auto flags = GetTextureFlags() | TextureFlags::IMMUTABLE;

  // Get a TexClient from our surf.
  RefPtr<TextureClient> newTex = TexClientFromShSurf(surf, flags);
  if (!newTex) {
    auto manager = aLayer->ClientManager();
    auto shadowForwarder = manager->AsShadowForwarder();
    auto layersBackend = shadowForwarder->GetCompositorBackendType();

    newTex = TexClientFromReadback(surf, forwarder, flags, layersBackend);
  }
  MOZ_ASSERT(newTex);

  // Add the new TexClient.
  MOZ_ALWAYS_TRUE( AddTextureClient(newTex) );

  // Remove the old TexClient.
  if (mFrontTex) {
    // remove old buffer from CompositableHost
    RefPtr<AsyncTransactionTracker> tracker = new RemoveTextureFromCompositableTracker();
    // Hold TextureClient until transaction complete.
    tracker->SetTextureClient(mFrontTex);
    mFrontTex->SetRemoveFromCompositableTracker(tracker);
    // RemoveTextureFromCompositableAsync() expects CompositorChild's presence.
    GetForwarder()->RemoveTextureFromCompositableAsync(tracker, this, mFrontTex);

    mFrontTex = nullptr;
  }

  // Use the new TexClient.
  mFrontTex = newTex;

  forwarder->UpdatedTexture(this, mFrontTex, nullptr);
  forwarder->UseTexture(this, mFrontTex);
}

bool ClientCanvasRenderer::CreateCompositable() {
  if (!mCanvasClient) {
    TextureFlags flags = TextureFlags::DEFAULT;
    if (mOriginPos == gl::OriginPos::BottomLeft) {
      flags |= TextureFlags::ORIGIN_BOTTOM_LEFT;
    }

    if (!mIsAlphaPremultiplied) {
      flags |= TextureFlags::NON_PREMULTIPLIED;
    }

    mCanvasClient = CanvasClient::CreateCanvasClient(GetCanvasClientType(),
                                                     GetForwarder(), flags);
    if (!mCanvasClient) {
      return false;
    }

    if (mLayer->HasShadow()) {
      if (mAsyncRenderer) {
        static_cast<CanvasClientBridge*>(mCanvasClient.get())->SetLayer(mLayer);
      } else {
        mCanvasClient->Connect();
        GetForwarder()->AsLayerForwarder()->Attach(mCanvasClient, mLayer);
      }
    }
  }

  return true;
}

void
CanvasClientSurfaceStream::Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer)
{
  GLScreenBuffer* screen = aLayer->mGLContext->Screen();
  SurfaceStream* stream = screen->Stream();

  bool isCrossProcess = !(XRE_GetProcessType() == GeckoProcessType_Default);
  bool bufferCreated = false;
  if (isCrossProcess) {
#ifdef MOZ_WIDGET_GONK
    SharedSurface* surf = stream->SwapConsumer();
    if (!surf) {
      printf_stderr("surf is null post-SwapConsumer!\n");
      return;
    }

    if (surf->Type() != SharedSurfaceType::Gralloc) {
      printf_stderr("Unexpected non-Gralloc SharedSurface in IPC path!");
      MOZ_ASSERT(false);
      return;
    }

    SharedSurface_Gralloc* grallocSurf = SharedSurface_Gralloc::Cast(surf);

    GrallocTextureClientOGL* grallocTextureClient =
      static_cast<GrallocTextureClientOGL*>(grallocSurf->GetTextureClient());

    // If IPDLActor is null means this TextureClient didn't AddTextureClient yet
    if (!grallocTextureClient->GetIPDLActor()) {
      grallocTextureClient->SetTextureFlags(mTextureInfo.mTextureFlags);
      AddTextureClient(grallocTextureClient);
    }

    if (grallocTextureClient->GetIPDLActor()) {
      GetForwarder()->UseTexture(this, grallocTextureClient);
    }
#else
    printf_stderr("isCrossProcess, but not MOZ_WIDGET_GONK! Someone needs to write some code!");
    MOZ_ASSERT(false);
#endif
  } else {
    if (!mBuffer) {
      StreamTextureClientOGL* textureClient =
        new StreamTextureClientOGL(mTextureInfo.mTextureFlags);
      textureClient->InitWith(stream);
      mBuffer = textureClient;
      bufferCreated = true;
    }

    if (bufferCreated && !AddTextureClient(mBuffer)) {
      mBuffer = nullptr;
    }

    if (mBuffer) {
      GetForwarder()->UseTexture(this, mBuffer);
    }
  }

  aLayer->Painted();
}

already_AddRefed<TextureClient>
CanvasClient2D::CreateTextureClientForCanvas(gfx::SurfaceFormat aFormat,
                                             gfx::IntSize aSize,
                                             TextureFlags aFlags,
                                             ClientCanvasLayer* aLayer)
{
  if (aLayer->IsGLLayer()) {
    // We want a cairo backend here as we don't want to be copying into
    // an accelerated backend and we like LockBits to work. This is currently
    // the most effective way to make this work.
    return TextureClient::CreateForRawBufferAccess(GetForwarder(),
                                                   aFormat, aSize, BackendType::CAIRO,
                                                   mTextureFlags | aFlags);
  }

#ifdef XP_WIN
  return CreateTextureClientForDrawing(aFormat, aSize, BackendSelector::Canvas, aFlags);
#else
  // XXX - We should use CreateTextureClientForDrawing, but we first need
  // to use double buffering.
  gfx::BackendType backend = gfxPlatform::GetPlatform()->GetPreferredCanvasBackend();
  return TextureClient::CreateForRawBufferAccess(GetForwarder(),
                                                 aFormat, aSize, backend,
                                                 mTextureFlags | aFlags);
#endif
}

void
CanvasClient2D::Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer)
{
  AutoRemoveTexture autoRemove(this);
  if (mBuffer &&
      (mBuffer->IsImmutable() || mBuffer->GetSize() != aSize)) {
    autoRemove.mTexture = mBuffer;
    mBuffer = nullptr;
  }

  bool bufferCreated = false;
  if (!mBuffer) {
    bool isOpaque = (aLayer->GetContentFlags() & Layer::CONTENT_OPAQUE);
    gfxContentType contentType = isOpaque
                                                ? gfxContentType::COLOR
                                                : gfxContentType::COLOR_ALPHA;
    gfxImageFormat format
      = gfxPlatform::GetPlatform()->OptimalFormatForContent(contentType);
    TextureFlags flags = TextureFlags::DEFAULT;
    if (mTextureFlags & TextureFlags::NEEDS_Y_FLIP) {
      flags |= TextureFlags::NEEDS_Y_FLIP;
    }

    gfx::SurfaceFormat surfaceFormat = gfx::ImageFormatToSurfaceFormat(format);
    mBuffer = CreateTextureClientForCanvas(surfaceFormat, aSize, flags, aLayer);
    MOZ_ASSERT(mBuffer->CanExposeDrawTarget());
    mBuffer->AllocateForSurface(aSize);

    bufferCreated = true;
  }

  if (!mBuffer->Lock(OpenMode::OPEN_WRITE_ONLY)) {
    mBuffer = nullptr;
    return;
  }

  bool updated = false;
  {
    // Restrict drawTarget to a scope so that terminates before Unlock.
    RefPtr<DrawTarget> target =
      mBuffer->BorrowDrawTarget();
    if (target) {
      aLayer->UpdateTarget(target);
      updated = true;
    }
  }
  mBuffer->Unlock();

  if (bufferCreated && !AddTextureClient(mBuffer)) {
    mBuffer = nullptr;
    return;
  }

  if (updated) {
    GetForwarder()->UpdatedTexture(this, mBuffer, nullptr);
    GetForwarder()->UseTexture(this, mBuffer);
  }
}

bool
CompositableClient::Connect()
{
  if (!GetForwarder() || GetIPDLActor()) {
    return false;
  }
  GetForwarder()->Connect(this);
  return true;
}

void
ImageClientBuffered::FlushAllImages(bool aExceptFront)
{
  if (!aExceptFront && mFrontBuffer) {
    GetForwarder()->RemoveTextureFromCompositable(this, mFrontBuffer);
    mFrontBuffer = nullptr;
  }
  if (mBackBuffer) {
    GetForwarder()->RemoveTextureFromCompositable(this, mBackBuffer);
    mBackBuffer = nullptr;
  }
}

void
CanvasClient2D::Update(gfx::IntSize aSize, ClientCanvasLayer* aLayer)
{
  if (mBuffer &&
      (mBuffer->IsImmutable() || mBuffer->GetSize() != aSize)) {
    GetForwarder()->RemoveTextureFromCompositable(this, mBuffer);
    mBuffer = nullptr;
  }

  bool bufferCreated = false;
  if (!mBuffer) {
    bool isOpaque = (aLayer->GetContentFlags() & Layer::CONTENT_OPAQUE);
    gfxContentType contentType = isOpaque
                                                ? gfxContentType::COLOR
                                                : gfxContentType::COLOR_ALPHA;
    gfxImageFormat format
      = gfxPlatform::GetPlatform()->OptimalFormatForContent(contentType);
    mBuffer = CreateBufferTextureClient(gfx::ImageFormatToSurfaceFormat(format));
    MOZ_ASSERT(mBuffer->AsTextureClientSurface());
    mBuffer->AsTextureClientSurface()->AllocateForSurface(aSize);

    bufferCreated = true;
  }

  if (!mBuffer->Lock(OPEN_WRITE_ONLY)) {
    return;
  }

  bool updated = false;
  {
    // Restrict drawTarget to a scope so that terminates before Unlock.
    RefPtr<DrawTarget> drawTarget =
      mBuffer->AsTextureClientDrawTarget()->GetAsDrawTarget();
    if (drawTarget) {
      aLayer->UpdateTarget(drawTarget);
      updated = true;
    }
  }
  mBuffer->Unlock();

  if (bufferCreated && !AddTextureClient(mBuffer)) {
    mBuffer = nullptr;
    return;
  }

  if (updated) {
    GetForwarder()->UpdatedTexture(this, mBuffer, nullptr);
    GetForwarder()->UseTexture(this, mBuffer);
  }
}

TemporaryRef<DeprecatedTextureClient>
CompositableClient::CreateDeprecatedTextureClient(DeprecatedTextureClientType aDeprecatedTextureClientType)
{
  MOZ_ASSERT(GetForwarder(), "Can't create a texture client if the compositable is not connected to the compositor.");
  LayersBackend parentBackend = GetForwarder()->GetCompositorBackendType();
  RefPtr<DeprecatedTextureClient> result;

  switch (aDeprecatedTextureClientType) {
  case TEXTURE_SHARED_GL:
    if (parentBackend == LAYERS_OPENGL) {
      result = new DeprecatedTextureClientSharedOGL(GetForwarder(), GetTextureInfo());
    }
     break;
  case TEXTURE_SHARED_GL_EXTERNAL:
    if (parentBackend == LAYERS_OPENGL) {
      result = new DeprecatedTextureClientSharedOGLExternal(GetForwarder(), GetTextureInfo());
    }
    break;
  case TEXTURE_STREAM_GL:
    if (parentBackend == LAYERS_OPENGL) {
      result = new DeprecatedTextureClientStreamOGL(GetForwarder(), GetTextureInfo());
    }
    break;
  case TEXTURE_YCBCR:
    if (parentBackend == LAYERS_OPENGL ||
        parentBackend == LAYERS_D3D11 ||
        parentBackend == LAYERS_BASIC) {
      result = new DeprecatedTextureClientShmemYCbCr(GetForwarder(), GetTextureInfo());
    }
    break;
  case TEXTURE_CONTENT:
#ifdef XP_WIN
    if (parentBackend == LAYERS_D3D11 && gfxWindowsPlatform::GetPlatform()->GetD2DDevice()) {
      result = new DeprecatedTextureClientD3D11(GetForwarder(), GetTextureInfo());
      break;
    }
#endif
     // fall through to TEXTURE_SHMEM
  case TEXTURE_SHMEM:
    result = new DeprecatedTextureClientShmem(GetForwarder(), GetTextureInfo());
    break;
  default:
    MOZ_ASSERT(false, "Unhandled texture client type");
  }

  // If we couldn't create an appropriate texture client,
  // then return nullptr so the caller can chose another
  // type.
  if (!result) {
    return nullptr;
  }

  MOZ_ASSERT(result->SupportsType(aDeprecatedTextureClientType),
             "Created the wrong texture client?");
  result->SetFlags(GetTextureInfo().mTextureFlags);

  return result.forget();
}

void
ShareableCanvasRenderer::UpdateCompositableClient()
{
  if (!CreateCompositable()) {
    return;
  }

  if (mCanvasClient && mAsyncRenderer) {
    mCanvasClient->UpdateAsync(mAsyncRenderer);
  }

  if (!IsDirty()) {
    return;
  }
  ResetDirty();

  FirePreTransactionCallback();
  if (mBufferProvider && mBufferProvider->GetTextureClient()) {
    if (!mBufferProvider->SetKnowsCompositor(GetForwarder())) {
      gfxCriticalNote << "BufferProvider::SetForwarder failed";
      return;
    }
    mCanvasClient->UpdateFromTexture(mBufferProvider->GetTextureClient());
  } else {
    mCanvasClient->Update(gfx::IntSize(mSize.width, mSize.height), this);
  }

  FireDidTransactionCallback();

  mCanvasClient->Updated();
}

bool WebRenderCanvasRendererAsync::CreateCompositable() {
  if (!mCanvasClient) {
    TextureFlags flags = TextureFlags::DEFAULT;
    if (mOriginPos == gl::OriginPos::BottomLeft) {
      flags |= TextureFlags::ORIGIN_BOTTOM_LEFT;
    }

    if (!mIsAlphaPremultiplied) {
      flags |= TextureFlags::NON_PREMULTIPLIED;
    }

    mCanvasClient = CanvasClient::CreateCanvasClient(GetCanvasClientType(),
                                                     GetForwarder(), flags);
    if (!mCanvasClient) {
      return false;
    }

    mCanvasClient->Connect();
  }

  if (!mPipelineId) {
    // Alloc async image pipeline id.
    mPipelineId = Some(
        mManager->WrBridge()->GetCompositorBridgeChild()->GetNextPipelineId());
    mManager->AddPipelineIdForCompositable(mPipelineId.ref(),
                                           mCanvasClient->GetIPCHandle());
  }

  return true;
}

bool
WebRenderCanvasRendererSync::CreateCompositable()
{
  if (!mCanvasClient) {
    TextureFlags flags = TextureFlags::DEFAULT;
    if (mOriginPos == gl::OriginPos::BottomLeft) {
      flags |= TextureFlags::ORIGIN_BOTTOM_LEFT;
    }

    if (!mIsAlphaPremultiplied) {
      flags |= TextureFlags::NON_PREMULTIPLIED;
    }

    mCanvasClient = CanvasClient::CreateCanvasClient(GetCanvasClientType(),
                                                     GetForwarder(),
                                                     flags);
    if (!mCanvasClient) {
      return false;
    }

    mCanvasClient->Connect();
  }

  if (mExternalImageId.isNothing()) {
    mExternalImageId = Some(mManager->WrBridge()->AllocExternalImageIdForCompositable(mCanvasClient));
  }

  return true;
}

void
ContentClientRemoteBuffer::Updated(const nsIntRegion& aRegionToDraw,
                                   const nsIntRegion& aVisibleRegion,
                                   bool aDidSelfCopy)
{
  nsIntRegion updatedRegion = GetUpdatedRegion(aRegionToDraw,
                                               aVisibleRegion,
                                               aDidSelfCopy);

  MOZ_ASSERT(mTextureClient);
  if (mTextureClientOnWhite) {
    mForwarder->UseComponentAlphaTextures(this, mTextureClient,
                                          mTextureClientOnWhite);
  } else {
    nsAutoTArray<CompositableForwarder::TimedTextureClient,1> textures;
    CompositableForwarder::TimedTextureClient* t = textures.AppendElement();
    t->mTextureClient = mTextureClient;
    IntSize size = mTextureClient->GetSize();
    t->mPictureRect = nsIntRect(0, 0, size.width, size.height);
    GetForwarder()->UseTextures(this, textures);
  }
  mForwarder->UpdateTextureRegion(this,
                                  ThebesBufferData(BufferRect(),
                                                   BufferRotation()),
                                  updatedRegion);
}