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// Copyright 2016 The Chromium Authors
// 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 <utility>
#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/common/thread_safe_browser_interface_broker_proxy.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
#include "ui/gfx/geometry/size.h"
namespace blink {
SurfaceLayerBridge::SurfaceLayerBridge(
viz::FrameSinkId parent_frame_sink_id,
ContainsVideo contains_video,
WebSurfaceLayerBridgeObserver* observer,
cc::UpdateSubmissionStateCB update_submission_state_callback)
: observer_(observer),
update_submission_state_callback_(
std::move(update_submission_state_callback)),
frame_sink_id_(Platform::Current()->GenerateFrameSinkId()),
contains_video_(contains_video),
parent_frame_sink_id_(parent_frame_sink_id) {
Platform::Current()->GetBrowserInterfaceBroker()->GetInterface(
embedded_frame_sink_provider_.BindNewPipeAndPassReceiver());
// 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.
embedded_frame_sink_provider_->RegisterEmbeddedFrameSink(
parent_frame_sink_id_, frame_sink_id_,
receiver_.BindNewPipeAndPassRemote());
}
SurfaceLayerBridge::~SurfaceLayerBridge() = default;
void SurfaceLayerBridge::CreateSolidColorLayer() {
// TODO(lethalantidote): Remove this logic. It should be covered by setting
// the layer's opacity to false.
solid_color_layer_ = cc::SolidColorLayer::Create();
solid_color_layer_->SetBackgroundColor(SkColors::kTransparent);
if (observer_)
observer_->RegisterContentsLayer(solid_color_layer_.get());
}
void SurfaceLayerBridge::SetLocalSurfaceId(
const viz::LocalSurfaceId& local_surface_id) {
EmbedSurface(viz::SurfaceId(frame_sink_id_, local_surface_id));
}
void SurfaceLayerBridge::EmbedSurface(const viz::SurfaceId& surface_id) {
if (solid_color_layer_) {
if (observer_)
observer_->UnregisterContentsLayer(solid_color_layer_.get());
solid_color_layer_->RemoveFromParent();
solid_color_layer_ = nullptr;
}
if (!surface_layer_) {
// This covers non-video cases, where we don't create the SurfaceLayer
// early.
// TODO(lethalantidote): Eliminate this case. Once you do that, you can
// also just store the surface_id and not the frame_sink_id.
CreateSurfaceLayer();
}
current_surface_id_ = surface_id;
surface_layer_->SetSurfaceId(surface_id,
cc::DeadlinePolicy::UseSpecifiedDeadline(0u));
if (observer_) {
observer_->OnWebLayerUpdated();
observer_->OnSurfaceIdUpdated(surface_id);
}
UpdateSurfaceLayerOpacity();
}
void SurfaceLayerBridge::BindSurfaceEmbedder(
mojo::PendingReceiver<mojom::blink::SurfaceEmbedder> receiver) {
if (surface_embedder_receiver_.is_bound()) {
// After recovering from a GPU context loss we have to re-bind to a new
// surface embedder.
std::ignore = surface_embedder_receiver_.Unbind();
}
surface_embedder_receiver_.Bind(std::move(receiver));
}
cc::Layer* SurfaceLayerBridge::GetCcLayer() const {
if (surface_layer_)
return surface_layer_.get();
return solid_color_layer_.get();
}
const viz::FrameSinkId& SurfaceLayerBridge::GetFrameSinkId() const {
return frame_sink_id_;
}
void SurfaceLayerBridge::ClearObserver() {
observer_ = nullptr;
}
void SurfaceLayerBridge::SetContentsOpaque(bool opaque) {
embedder_expects_opaque_ = opaque;
UpdateSurfaceLayerOpacity();
}
void SurfaceLayerBridge::CreateSurfaceLayer() {
surface_layer_ = cc::SurfaceLayer::Create(update_submission_state_callback_);
// This surface_id is essentially just a placeholder for the real one we will
// get in OnFirstSurfaceActivation. We need it so that we properly get a
// WillDraw, which then pushes the first compositor frame.
parent_local_surface_id_allocator_.GenerateId();
current_surface_id_ = viz::SurfaceId(
frame_sink_id_,
parent_local_surface_id_allocator_.GetCurrentLocalSurfaceId());
surface_layer_->SetSurfaceId(current_surface_id_,
cc::DeadlinePolicy::UseDefaultDeadline());
surface_layer_->SetStretchContentToFillBounds(true);
surface_layer_->SetIsDrawable(true);
surface_layer_->SetHitTestable(true);
surface_layer_->SetMayContainVideo(contains_video_ == ContainsVideo::kYes);
surface_layer_->SetOverrideChildPaintFlags(true);
if (observer_) {
observer_->RegisterContentsLayer(surface_layer_.get());
}
// We ignore our opacity until we are sure that we have something to show that
// is opaque. If the embeddee has not pushed any frames yet, then we
// definitely do not want to claim to be opaque, else viz will fall back to
// the quad's default (transparent!) color.
surface_layer_->SetContentsOpaque(false);
}
void SurfaceLayerBridge::RegisterFrameSinkHierarchy() {
embedded_frame_sink_provider_->RegisterFrameSinkHierarchy(frame_sink_id_);
}
void SurfaceLayerBridge::UnregisterFrameSinkHierarchy() {
embedded_frame_sink_provider_->UnregisterFrameSinkHierarchy(frame_sink_id_);
}
void SurfaceLayerBridge::OnOpacityChanged(bool is_opaque) {
frames_are_opaque_ = is_opaque;
UpdateSurfaceLayerOpacity();
}
void SurfaceLayerBridge::UpdateSurfaceLayerOpacity() {
if (!surface_layer_) {
return;
}
// "Is not opaque" is safe, since cc will emit quads under the surface layer.
// If the surface layer turns out not to draw every pixel, this is fine. If
// we are sure that the submitted frames are opaque, and the embedder
// (pipeline) expects this to continue, then allow the optimization of setting
// `surface_layer_` to opaque to elide emitted quads under it.
surface_layer_->SetContentsOpaque(embedder_expects_opaque_ &&
frames_are_opaque_);
}
} // namespace blink
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