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// Copyright 2015 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.
#ifndef CC_OUTPUT_OVERLAY_STRATEGY_SANDWICH_H_
#define CC_OUTPUT_OVERLAY_STRATEGY_SANDWICH_H_
#include "base/macros.h"
#include "cc/output/overlay_processor.h"
namespace cc {
class OverlayCandidateValidator;
// The sandwich strategy looks for a video quad without regard to quads above
// it. The video is "overlaid" on top of the scene, and then the non-empty
// parts of the scene are "overlaid" on top of the video. This is only valid
// for overlay contents that are fully opaque.
class CC_EXPORT OverlayStrategySandwich : public OverlayProcessor::Strategy {
public:
explicit OverlayStrategySandwich(
OverlayCandidateValidator* capability_checker);
~OverlayStrategySandwich() override;
bool Attempt(ResourceProvider* resource_provider,
RenderPassList* render_passes,
OverlayCandidateList* candidate_list) override;
private:
QuadList::Iterator TryOverlay(RenderPass* render_pass,
OverlayCandidateList* candidate_list,
const OverlayCandidate& candidate,
QuadList::Iterator candidate_iterator);
OverlayCandidateValidator* capability_checker_; // Weak.
DISALLOW_COPY_AND_ASSIGN(OverlayStrategySandwich);
};
} // namespace cc
#endif // CC_OUTPUT_OVERLAY_STRATEGY_SANDWICH_H_
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