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// Copyright 2014 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_PROCESSOR_H_
#define CC_OUTPUT_OVERLAY_PROCESSOR_H_
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "cc/base/cc_export.h"
#include "cc/output/overlay_candidate.h"
#include "cc/quads/render_pass.h"
namespace cc {
class OutputSurface;
class ResourceProvider;
class CC_EXPORT OverlayProcessor {
public:
class CC_EXPORT Strategy {
public:
virtual ~Strategy() {}
// Returns false if the strategy cannot be made to work with the
// current set of render passes. Returns true if the strategy was successful
// and adds any additional passes necessary to represent overlays to
// |render_passes_in_draw_order|.
virtual bool Attempt(RenderPassList* render_passes_in_draw_order,
OverlayCandidateList* candidates) = 0;
};
typedef ScopedPtrVector<Strategy> StrategyList;
explicit OverlayProcessor(OutputSurface* surface);
virtual ~OverlayProcessor();
// Virtual to allow testing different strategies.
virtual void Initialize();
void ProcessForOverlays(RenderPassList* render_passes_in_draw_order,
OverlayCandidateList* candidate_list);
protected:
StrategyList strategies_;
OutputSurface* surface_;
private:
DISALLOW_COPY_AND_ASSIGN(OverlayProcessor);
};
} // namespace cc
#endif // CC_OUTPUT_OVERLAY_PROCESSOR_H_