1 files changed, 103 insertions, 0 deletions
diff --git a/chromium/third_party/blink/renderer/platform/graphics/surface_layer_bridge.cc b/chromium/third_party/blink/renderer/platform/graphics/surface_layer_bridge.cc
new file mode 100644
index 00000000000..f46a7d111e2
--- /dev/null
+++ b/chromium/third_party/blink/renderer/platform/graphics/surface_layer_bridge.cc
@@ -0,0 +1,103 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "third_party/blink/renderer/platform/graphics/surface_layer_bridge.h"
+
+#include "base/feature_list.h"
+#include "cc/layers/layer.h"
+#include "cc/layers/solid_color_layer.h"
+#include "cc/layers/surface_layer.h"
+#include "components/viz/common/surfaces/surface_id.h"
+#include "components/viz/common/surfaces/surface_info.h"
+#include "media/base/media_switches.h"
+#include "third_party/blink/public/platform/interface_provider.h"
+#include "third_party/blink/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom-blink.h"
+#include "third_party/blink/public/platform/platform.h"
+#include "third_party/blink/public/platform/web_compositor_support.h"
+#include "third_party/blink/public/platform/web_layer.h"
+#include "third_party/blink/public/platform/web_layer_tree_view.h"
+#include "third_party/blink/renderer/platform/mojo/mojo_helper.h"
+#include "third_party/blink/renderer/platform/wtf/functional.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace blink {
+
+SurfaceLayerBridge::SurfaceLayerBridge(WebLayerTreeView* layer_tree_view,
+                                       WebSurfaceLayerBridgeObserver* observer)
+    : observer_(observer),
+      binding_(this),
+      frame_sink_id_(Platform::Current()->GenerateFrameSinkId()),
+      parent_frame_sink_id_(layer_tree_view ? layer_tree_view->GetFrameSinkId()
+                                            : viz::FrameSinkId()) {
+  mojom::blink::OffscreenCanvasProviderPtr provider;
+  Platform::Current()->GetInterfaceProvider()->GetInterface(
+      mojo::MakeRequest(&provider));
+  // TODO(xlai): Ensure OffscreenCanvas commit() is still functional when a
+  // frame-less HTML canvas's document is reparenting under another frame.
+  // See crbug.com/683172.
+  blink::mojom::blink::OffscreenCanvasSurfaceClientPtr client;
+  binding_.Bind(mojo::MakeRequest(&client));
+  provider->CreateOffscreenCanvasSurface(parent_frame_sink_id_, frame_sink_id_,
+                                         std::move(client));
+}
+
+SurfaceLayerBridge::~SurfaceLayerBridge() {
+  observer_ = nullptr;
+}
+
+void SurfaceLayerBridge::CreateSolidColorLayer() {
+  cc_layer_ = cc::SolidColorLayer::Create();
+  cc_layer_->SetBackgroundColor(SK_ColorTRANSPARENT);
+
+  web_layer_ = Platform::Current()->CompositorSupport()->CreateLayerFromCCLayer(
+      cc_layer_.get());
+
+  if (observer_)
+    observer_->RegisterContentsLayer(web_layer_.get());
+}
+
+void SurfaceLayerBridge::OnFirstSurfaceActivation(
+    const viz::SurfaceInfo& surface_info) {
+  if (!current_surface_id_.is_valid() && surface_info.is_valid()) {
+    // First time a SurfaceId is received.
+    current_surface_id_ = surface_info.id();
+    if (web_layer_) {
+      if (observer_)
+        observer_->UnregisterContentsLayer(web_layer_.get());
+      web_layer_->RemoveFromParent();
+    }
+
+    scoped_refptr<cc::SurfaceLayer> surface_layer = cc::SurfaceLayer::Create();
+    surface_layer->SetPrimarySurfaceId(
+        surface_info.id(), cc::DeadlinePolicy::UseDefaultDeadline());
+    surface_layer->SetFallbackSurfaceId(surface_info.id());
+    surface_layer->SetStretchContentToFillBounds(true);
+    surface_layer->SetIsDrawable(true);
+    cc_layer_ = surface_layer;
+
+    web_layer_ =
+        Platform::Current()->CompositorSupport()->CreateLayerFromCCLayer(
+            cc_layer_.get());
+    if (observer_)
+      observer_->RegisterContentsLayer(web_layer_.get());
+  } else if (current_surface_id_ != surface_info.id()) {
+    // A different SurfaceId is received, prompting change to existing
+    // SurfaceLayer.
+    current_surface_id_ = surface_info.id();
+    cc::SurfaceLayer* surface_layer =
+        static_cast<cc::SurfaceLayer*>(cc_layer_.get());
+    surface_layer->SetPrimarySurfaceId(
+        surface_info.id(), cc::DeadlinePolicy::UseDefaultDeadline());
+    surface_layer->SetFallbackSurfaceId(surface_info.id());
+  }
+
+  if (observer_) {
+    observer_->OnWebLayerUpdated();
+    observer_->OnSurfaceIdUpdated(surface_info.id());
+  }
+
+  cc_layer_->SetBounds(surface_info.size_in_pixels());
+}
+
+}  // namespace blink