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 OverlayStrategyCommon : public OverlayProcessor::Strategy {
  20  public:
  21   explicit OverlayStrategyCommon(OverlayCandidateValidator* capability_checker);
  22   ~OverlayStrategyCommon() override;
  23
  24   bool Attempt(RenderPassList* render_passes_in_draw_order,
  25                OverlayCandidateList* candidate_list) override;
  26
  27  protected:
  28   bool GetCandidateQuadInfo(const DrawQuad& draw_quad,
  29                             OverlayCandidate* quad_info);
  30
  31   // Returns true if |draw_quad| will not block quads underneath from becoming
  32   // an overlay.
  33   bool IsInvisibleQuad(const DrawQuad* draw_quad);
  34
  35   // Returns true if |draw_quad| is of a known quad type and contains an
  36   // overlayable resource.
  37   bool IsOverlayQuad(const DrawQuad* draw_quad);
  38
  39   bool GetTextureQuadInfo(const TextureDrawQuad& quad,
  40                           OverlayCandidate* quad_info);
  41   bool GetVideoQuadInfo(const StreamVideoDrawQuad& quad,
  42                         OverlayCandidate* quad_info);
  43   bool GetIOSurfaceQuadInfo(const IOSurfaceDrawQuad& quad,
  44                             OverlayCandidate* quad_info);
  45
  46   virtual bool TryOverlay(OverlayCandidateValidator* capability_checker,
  47                           RenderPassList* render_passes_in_draw_order,
  48                           OverlayCandidateList* candidate_list,
  49                           const OverlayCandidate& candidate,
  50                           QuadList::Iterator iter) = 0;
  51
  52  private:
  53   OverlayCandidateValidator* capability_checker_;
  54
  55   DISALLOW_COPY_AND_ASSIGN(OverlayStrategyCommon);
  56 };
  57 }  // namespace cc
  58
  59 #endif  // CC_OUTPUT_OVERLAY_STRATEGY_COMMON_H_