output_surface_client.h

// Copyright 2012 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_OUTPUT_SURFACE_CLIENT_H_
#define CC_OUTPUT_OUTPUT_SURFACE_CLIENT_H_

#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "cc/base/cc_export.h"
#include "cc/output/context_provider.h"
#include "ui/gfx/geometry/rect.h"

namespace gfx {
class Transform;
}

namespace cc {

class CompositorFrameAck;
struct ManagedMemoryPolicy;

class CC_EXPORT OutputSurfaceClient {
 public:
  virtual void CommitVSyncParameters(base::TimeTicks timebase,
                                     base::TimeDelta interval) = 0;
  virtual void SetNeedsRedrawRect(const gfx::Rect& damage_rect) = 0;
  virtual void DidSwapBuffers() = 0;
  virtual void DidSwapBuffersComplete() = 0;
  virtual void ReclaimResources(const CompositorFrameAck* ack) = 0;
  virtual void DidLoseOutputSurface() = 0;
  virtual void SetExternalTilePriorityConstraints(
      const gfx::Rect& viewport_rect,
      const gfx::Transform& transform) = 0;
  virtual void SetMemoryPolicy(const ManagedMemoryPolicy& policy) = 0;
  // If set, |callback| will be called subsequent to each new tree activation,
  // regardless of the compositor visibility or damage. |callback| must remain
  // valid for the lifetime of the OutputSurfaceClient or until unregisted --
  // use SetTreeActivationCallback(base::Closure()) to unregister it.
  virtual void SetTreeActivationCallback(const base::Closure& callback) = 0;
  // This allows the output surface to ask it's client for a draw.
  virtual void OnDraw(const gfx::Transform& transform,
                      const gfx::Rect& viewport,
                      const gfx::Rect& clip,
                      bool resourceless_software_draw) = 0;

 protected:
  virtual ~OutputSurfaceClient() {}
};

}  // namespace cc

#endif  // CC_OUTPUT_OUTPUT_SURFACE_CLIENT_H_