1 files changed, 81 insertions, 0 deletions
diff --git a/gfx/layers/wr/WebRenderCanvasRenderer.cpp b/gfx/layers/wr/WebRenderCanvasRenderer.cpp
new file mode 100644
index 0000000000..2576cbd8ec
--- /dev/null
+++ b/gfx/layers/wr/WebRenderCanvasRenderer.cpp
@@ -0,0 +1,81 @@
+/* -*- 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 "WebRenderCanvasRenderer.h"
+
+#include "GLContext.h"
+#include "GLScreenBuffer.h"
+#include "mozilla/layers/CompositorBridgeChild.h"
+#include "SharedSurfaceGL.h"
+#include "WebRenderBridgeChild.h"
+#include "RenderRootStateManager.h"
+
+namespace mozilla {
+namespace layers {
+
+CompositableForwarder* WebRenderCanvasRenderer::GetForwarder() {
+  return mManager->WrBridge();
+}
+
+WebRenderCanvasRendererAsync::~WebRenderCanvasRendererAsync() {
+  if (mPipelineId.isSome()) {
+    mManager->RemovePipelineIdForCompositable(mPipelineId.ref());
+    mPipelineId.reset();
+  }
+}
+
+void WebRenderCanvasRendererAsync::Initialize(const CanvasRendererData& aData) {
+  WebRenderCanvasRenderer::Initialize(aData);
+
+  ClearCachedResources();
+}
+
+bool WebRenderCanvasRendererAsync::CreateCompositable() {
+  if (!mCanvasClient) {
+    auto compositableFlags = TextureFlags::NO_FLAGS;
+    if (!mData.mIsAlphaPremult) {
+      // WR needs this flag marked on the compositable, not just the texture.
+      compositableFlags |= TextureFlags::NON_PREMULTIPLIED;
+    }
+    mCanvasClient = new CanvasClient(GetForwarder(), compositableFlags);
+    mCanvasClient->Connect();
+  }
+
+  if (!mPipelineId) {
+    // Alloc async image pipeline id.
+    mPipelineId = Some(
+        mManager->WrBridge()->GetCompositorBridgeChild()->GetNextPipelineId());
+    mManager->AddPipelineIdForCompositable(mPipelineId.ref(),
+                                           mCanvasClient->GetIPCHandle());
+  }
+
+  return true;
+}
+
+void WebRenderCanvasRendererAsync::ClearCachedResources() {
+  if (mPipelineId.isSome()) {
+    mManager->RemovePipelineIdForCompositable(mPipelineId.ref());
+    mPipelineId.reset();
+  }
+}
+
+void WebRenderCanvasRendererAsync::
+    UpdateCompositableClientForEmptyTransaction() {
+  bool wasDirty = IsDirty();
+  UpdateCompositableClient();
+  if (wasDirty && mPipelineId.isSome()) {
+    // Notify an update of async image pipeline during empty transaction.
+    // During non empty transaction, WebRenderBridgeParent receives
+    // OpUpdateAsyncImagePipeline message, but during empty transaction, the
+    // message is not sent to WebRenderBridgeParent. Then
+    // OpUpdatedAsyncImagePipeline is used to notify the update.
+    mManager->AddWebRenderParentCommand(
+        OpUpdatedAsyncImagePipeline(mPipelineId.ref()));
+  }
+}
+
+}  // namespace layers
+}  // namespace mozilla