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 OverlayCandidateValidator;
  14 class StreamVideoDrawQuad;
  15 class TextureDrawQuad;
  16 class OverlayCandidate;
  17
  18 class CC_EXPORT OverlayStrategyCommon : public OverlayProcessor::Strategy {
  19  public:
  20   explicit OverlayStrategyCommon(OverlayCandidateValidator* capability_checker);
  21   ~OverlayStrategyCommon() override;
  22
  23   bool Attempt(RenderPassList* render_passes_in_draw_order,
  24                OverlayCandidateList* candidate_list) override;
  25
  26  protected:
  27   bool GetCandidateQuadInfo(const DrawQuad& draw_quad,
  28                             OverlayCandidate* quad_info);
  29
  30   // Returns true if |draw_quad| will not block quads underneath from becoming
  31   // an overlay.
  32   bool IsInvisibleQuad(const DrawQuad* draw_quad);
  33
  34   // Returns true if |draw_quad| is of a known quad type and contains an
  35   // overlayable resource.
  36   bool IsOverlayQuad(const DrawQuad* draw_quad);
  37
  38   bool GetTextureQuadInfo(const TextureDrawQuad& quad,
  39                           OverlayCandidate* quad_info);
  40   bool GetVideoQuadInfo(const StreamVideoDrawQuad& quad,
  41                         OverlayCandidate* quad_info);
  42
  43   virtual bool TryOverlay(OverlayCandidateValidator* capability_checker,
  44                           RenderPassList* render_passes_in_draw_order,
  45                           OverlayCandidateList* candidate_list,
  46                           const OverlayCandidate& candidate,
  47                           QuadList::Iterator iter) = 0;
  48
  49  private:
  50   OverlayCandidateValidator* capability_checker_;
  51
  52   DISALLOW_COPY_AND_ASSIGN(OverlayStrategyCommon);
  53 };
  54 }  // namespace cc
  55
  56 #endif  // CC_OUTPUT_OVERLAY_STRATEGY_COMMON_H_