cc/output/overlay_strategy_single_on_top.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_OUTPUT_OVERLAY_STRATEGY_SINGLE_ON_TOP_H_
   6 #define CC_OUTPUT_OVERLAY_STRATEGY_SINGLE_ON_TOP_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "cc/base/cc_export.h"
  11 #include "cc/output/overlay_candidate.h"
  12 #include "cc/output/overlay_processor.h"
  13 #include "cc/quads/render_pass.h"
  14
  15 namespace cc {
  16 class OverlayCandidateValidator;
  17 class StreamVideoDrawQuad;
  18 class TextureDrawQuad;
  19
  20 class CC_EXPORT OverlayStrategySingleOnTop : public OverlayProcessor::Strategy {
  21  public:
  22   OverlayStrategySingleOnTop(OverlayCandidateValidator* capability_checker,
  23                              ResourceProvider* resource_provider);
  24   bool Attempt(RenderPassList* render_passes_in_draw_order,
  25                OverlayCandidateList* candidate_list) override;
  26
  27  private:
  28   bool IsOverlayQuad(const DrawQuad* draw_quad);
  29   bool GetCandidateQuadInfo(const DrawQuad& draw_quad,
  30                             OverlayCandidate* quad_info);
  31
  32   // Returns true if |draw_quad| will not block quads underneath from becoming
  33   // an overlay.
  34   bool IsInvisibleQuad(const DrawQuad* draw_quad);
  35
  36   bool GetTextureQuadInfo(const TextureDrawQuad& quad,
  37                           OverlayCandidate* quad_info);
  38   bool GetVideoQuadInfo(const StreamVideoDrawQuad& quad,
  39                         OverlayCandidate* quad_info);
  40
  41   OverlayCandidateValidator* capability_checker_;
  42   ResourceProvider* resource_provider_;
  43   DISALLOW_COPY_AND_ASSIGN(OverlayStrategySingleOnTop);
  44 };
  45
  46 }  // namespace cc
  47
  48 #endif  // CC_OUTPUT_OVERLAY_STRATEGY_SINGLE_ON_TOP_H_