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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_LAYERS_SURFACE_LAYER_H_
#define CC_LAYERS_SURFACE_LAYER_H_
#include <memory>
#include "cc/cc_export.h"
#include "cc/layers/deadline_policy.h"
#include "cc/layers/layer.h"
#include "components/viz/common/surfaces/surface_info.h"
#include "components/viz/common/surfaces/surface_range.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/size.h"
namespace base {
class WaitableEvent;
}
namespace cc {
// If given true, we should submit frames, as we are unoccluded on screen.
// If given false, we should not submit compositor frames.
// The second parameter is only used in tests to ensure that the
// UpdateSubmissionStateCB is called synchronously relative to the calling
// thread. That is, the calling thread will block on the given waitable event
// when calling the callback. It is the responsibility of the callback to signal
// the event once the state has been updated. If blocking is not required, then
// the second parameter will be nullptr.
using UpdateSubmissionStateCB =
base::RepeatingCallback<void(bool is_visible, base::WaitableEvent*)>;
// A layer that renders a surface referencing the output of another compositor
// instance or client.
class CC_EXPORT SurfaceLayer : public Layer {
public:
static scoped_refptr<SurfaceLayer> Create();
static scoped_refptr<SurfaceLayer> Create(UpdateSubmissionStateCB);
SurfaceLayer(const SurfaceLayer&) = delete;
SurfaceLayer& operator=(const SurfaceLayer&) = delete;
void SetSurfaceId(const viz::SurfaceId& surface_id,
const DeadlinePolicy& deadline_policy);
void SetOldestAcceptableFallback(const viz::SurfaceId& surface_id);
// When stretch_content_to_fill_bounds is true, the scale of the embedded
// surface is ignored and the content will be stretched to fill the bounds.
void SetStretchContentToFillBounds(bool stretch_content_to_fill_bounds);
bool stretch_content_to_fill_bounds() const {
return stretch_content_to_fill_bounds_.Read(*this);
}
void SetSurfaceHitTestable(bool surface_hit_testable);
void SetHasPointerEventsNone(bool has_pointer_events_none);
void SetIsReflection(bool is_reflection);
void SetMayContainVideo(bool may_contain_video);
// Layer overrides.
std::unique_ptr<LayerImpl> CreateLayerImpl(
LayerTreeImpl* tree_impl) const override;
void SetLayerTreeHost(LayerTreeHost* host) override;
void PushPropertiesTo(LayerImpl* layer,
const CommitState& commit_state,
const ThreadUnsafeCommitState& unsafe_state) override;
const viz::SurfaceId& surface_id() const {
return surface_range_.Read(*this).end();
}
const absl::optional<viz::SurfaceId>& oldest_acceptable_fallback() const {
return surface_range_.Read(*this).start();
}
absl::optional<uint32_t> deadline_in_frames() const {
return deadline_in_frames_.Read(*this);
}
protected:
SurfaceLayer();
explicit SurfaceLayer(UpdateSubmissionStateCB);
bool HasDrawableContent() const override;
private:
~SurfaceLayer() override;
ProtectedSequenceWritable<UpdateSubmissionStateCB>
update_submission_state_callback_;
ProtectedSequenceReadable<bool> may_contain_video_;
ProtectedSequenceReadable<viz::SurfaceRange> surface_range_;
ProtectedSequenceWritable<absl::optional<uint32_t>> deadline_in_frames_;
ProtectedSequenceReadable<bool> stretch_content_to_fill_bounds_;
// Whether or not the surface should submit hit test data when submitting
// compositor frame. The bit represents that the surface layer may be
// associated with an out-of-process iframe and viz hit testing needs to know
// the hit test information of that iframe. This bit is different from a layer
// being hit testable in the renderer, a hit testable surface layer may not
// be surface hit testable (e.g., a surface layer created by video).
ProtectedSequenceReadable<bool> surface_hit_testable_;
// Whether or not the surface can accept pointer events. It is set to true if
// the frame owner has pointer-events: none property.
// TODO(sunxd): consider renaming it to oopif_has_pointer_events_none_ for
// disambiguation.
ProtectedSequenceWritable<bool> has_pointer_events_none_;
// This surface layer is reflecting the root surface of another display.
ProtectedSequenceReadable<bool> is_reflection_;
// Keep track when we change LayerTreeHosts as SurfaceLayerImpl needs to know
// in order to keep the visibility callback state consistent.
ProtectedSequenceWritable<bool> callback_layer_tree_host_changed_;
};
} // namespace cc
#endif // CC_LAYERS_SURFACE_LAYER_H_
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