cc/surfaces/surface_aggregator.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_SURFACES_SURFACE_AGGREGATOR_H_
   6 #define CC_SURFACES_SURFACE_AGGREGATOR_H_
   7
   8 #include <set>
   9
  10 #include "base/containers/hash_tables.h"
  11 #include "base/containers/scoped_ptr_hash_map.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "cc/quads/render_pass.h"
  14 #include "cc/resources/transferable_resource.h"
  15 #include "cc/surfaces/surface_id.h"
  16 #include "cc/surfaces/surfaces_export.h"
  17
  18 namespace cc {
  19
  20 class CompositorFrame;
  21 class DelegatedFrameData;
  22 class ResourceProvider;
  23 class Surface;
  24 class SurfaceDrawQuad;
  25 class SurfaceManager;
  26
  27 class CC_SURFACES_EXPORT SurfaceAggregator {
  28  public:
  29   typedef base::hash_map<SurfaceId, int> SurfaceIndexMap;
  30
  31   SurfaceAggregator(SurfaceManager* manager, ResourceProvider* provider);
  32   ~SurfaceAggregator();
  33
  34   scoped_ptr<CompositorFrame> Aggregate(SurfaceId surface_id);
  35   void ReleaseResources(SurfaceId surface_id);
  36   SurfaceIndexMap& previous_contained_surfaces() {
  37     return previous_contained_surfaces_;
  38   }
  39
  40  private:
  41   struct ClipData {
  42     ClipData() : is_clipped(false) {}
  43     ClipData(bool is_clipped, const gfx::Rect& rect)
  44         : is_clipped(is_clipped), rect(rect) {}
  45
  46     bool is_clipped;
  47     gfx::Rect rect;
  48   };
  49
  50   ClipData CalculateClipRect(const ClipData& surface_clip,
  51                              const ClipData& quad_clip,
  52                              const gfx::Transform& content_to_target_transform);
  53
  54   RenderPassId RemapPassId(RenderPassId surface_local_pass_id,
  55                            SurfaceId surface_id);
  56
  57   void HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
  58                          const gfx::Transform& content_to_target_transform,
  59                          const ClipData& clip_rect,
  60                          RenderPass* dest_pass);
  61   void CopySharedQuadState(const SharedQuadState* source_sqs,
  62                            const gfx::Transform& content_to_target_transform,
  63                            const ClipData& clip_rect,
  64                            RenderPass* dest_render_pass);
  65   void CopyQuadsToPass(const QuadList& source_quad_list,
  66                        const SharedQuadStateList& source_shared_quad_state_list,
  67                        const gfx::Transform& content_to_target_transform,
  68                        const ClipData& clip_rect,
  69                        RenderPass* dest_pass,
  70                        SurfaceId surface_id);
  71   void CopyPasses(const DelegatedFrameData* frame_data, Surface* surface);
  72
  73   // Remove Surfaces that were referenced before but aren't currently
  74   // referenced from the ResourceProvider.
  75   void RemoveUnreferencedChildren();
  76
  77   bool TakeResources(Surface* surface,
  78                      const DelegatedFrameData* frame_data,
  79                      RenderPassList* render_pass_list);
  80   int ChildIdForSurface(Surface* surface);
  81   gfx::Rect DamageRectForSurface(const Surface* surface,
  82                                  const RenderPass& source,
  83                                  const gfx::Rect& full_rect);
  84
  85   SurfaceManager* manager_;
  86   ResourceProvider* provider_;
  87
  88   class RenderPassIdAllocator;
  89   typedef base::ScopedPtrHashMap<SurfaceId, RenderPassIdAllocator>
  90       RenderPassIdAllocatorMap;
  91   RenderPassIdAllocatorMap render_pass_allocator_map_;
  92   int next_render_pass_id_;
  93
  94   typedef base::hash_map<SurfaceId, int> SurfaceToResourceChildIdMap;
  95   SurfaceToResourceChildIdMap surface_id_to_resource_child_id_;
  96
  97   // The following state is only valid for the duration of one Aggregate call
  98   // and is only stored on the class to avoid having to pass through every
  99   // function call.
 100
 101   // This is the set of surfaces referenced in the aggregation so far, used to
 102   // detect cycles.
 103   typedef std::set<SurfaceId> SurfaceSet;
 104   SurfaceSet referenced_surfaces_;
 105
 106   // For each Surface used in the last aggregation, gives the frame_index at
 107   // that time.
 108   SurfaceIndexMap previous_contained_surfaces_;
 109   SurfaceIndexMap contained_surfaces_;
 110
 111   // This is the pass list for the aggregated frame.
 112   RenderPassList* dest_pass_list_;
 113
 114   // Resource list for the aggregated frame.
 115   TransferableResourceArray* dest_resource_list_;
 116
 117   DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
 118 };
 119
 120 }  // namespace cc
 121
 122 #endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_