cc/output/overlay_strategy_common.h

   1 // Copyright 2015 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_COMMON_H_
   6 #define CC_OUTPUT_OVERLAY_STRATEGY_COMMON_H_
   7
   8 #include "cc/base/cc_export.h"
   9 #include "cc/output/overlay_candidate.h"
  10 #include "cc/output/overlay_processor.h"
  11
  12 namespace cc {
  13 class IOSurfaceDrawQuad;
  14 class OverlayCandidate;
  15 class OverlayCandidateValidator;
  16 class StreamVideoDrawQuad;
  17 class TextureDrawQuad;
  18
  19 class CC_EXPORT OverlayStrategyCommonDelegate {
  20  public:
  21   virtual ~OverlayStrategyCommonDelegate() {}
  22   virtual bool TryOverlay(OverlayCandidateValidator* capability_checker,
  23                           RenderPassList* render_passes_in_draw_order,
  24                           OverlayCandidateList* candidate_list,
  25                           const OverlayCandidate& candidate,
  26                           QuadList::Iterator iter,
  27                           float device_scale_factor) = 0;
  28 };
  29
  30 class CC_EXPORT OverlayStrategyCommon : public OverlayProcessor::Strategy {
  31  public:
  32   explicit OverlayStrategyCommon(OverlayCandidateValidator* capability_checker,
  33                                  OverlayStrategyCommonDelegate* delegate);
  34   ~OverlayStrategyCommon() override;
  35
  36   bool Attempt(RenderPassList* render_passes_in_draw_order,
  37                OverlayCandidateList* candidate_list,
  38                float device_scale_factor) override;
  39
  40   // Returns true if |draw_quad| will not block quads underneath from becoming
  41   // an overlay.
  42   static bool IsInvisibleQuad(const DrawQuad* draw_quad);
  43
  44  protected:
  45   bool GetCandidateQuadInfo(const DrawQuad& draw_quad,
  46                             OverlayCandidate* quad_info);
  47
  48   // Returns true if |draw_quad| is of a known quad type and contains an
  49   // overlayable resource.
  50   bool IsOverlayQuad(const DrawQuad* draw_quad);
  51
  52   bool GetTextureQuadInfo(const TextureDrawQuad& quad,
  53                           OverlayCandidate* quad_info);
  54   bool GetVideoQuadInfo(const StreamVideoDrawQuad& quad,
  55                         OverlayCandidate* quad_info);
  56   bool GetIOSurfaceQuadInfo(const IOSurfaceDrawQuad& quad,
  57                             OverlayCandidate* quad_info);
  58
  59  private:
  60   OverlayCandidateValidator* capability_checker_;
  61   scoped_ptr<OverlayStrategyCommonDelegate> delegate_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(OverlayStrategyCommon);
  64 };
  65 }  // namespace cc
  66
  67 #endif  // CC_OUTPUT_OVERLAY_STRATEGY_COMMON_H_