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   SurfaceIndexMap& previous_contained_surfaces() {
  36     return previous_contained_surfaces_;
  37   }
  38
  39  private:
  40   RenderPassId RemapPassId(RenderPassId surface_local_pass_id,
  41                            SurfaceId surface_id);
  42
  43   void HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
  44                          RenderPass* dest_pass);
  45   void CopySharedQuadState(const SharedQuadState* source_sqs,
  46                            const gfx::Transform& content_to_target_transform,
  47                            RenderPass* dest_render_pass);
  48   void CopyQuadsToPass(const QuadList& source_quad_list,
  49                        const SharedQuadStateList& source_shared_quad_state_list,
  50                        const gfx::Transform& content_to_target_transform,
  51                        RenderPass* dest_pass,
  52                        SurfaceId surface_id);
  53   void CopyPasses(const DelegatedFrameData* frame_data, Surface* surface);
  54
  55   bool TakeResources(Surface* surface,
  56                      const DelegatedFrameData* frame_data,
  57                      RenderPassList* render_pass_list);
  58   int ChildIdForSurface(Surface* surface);
  59   gfx::Rect DamageRectForSurface(const Surface* surface,
  60                                  const RenderPass& source);
  61
  62   SurfaceManager* manager_;
  63   ResourceProvider* provider_;
  64
  65   class RenderPassIdAllocator;
  66   typedef base::ScopedPtrHashMap<SurfaceId, RenderPassIdAllocator>
  67       RenderPassIdAllocatorMap;
  68   RenderPassIdAllocatorMap render_pass_allocator_map_;
  69   int next_render_pass_id_;
  70
  71   typedef base::hash_map<SurfaceId, int> SurfaceToResourceChildIdMap;
  72   SurfaceToResourceChildIdMap surface_id_to_resource_child_id_;
  73
  74   // The following state is only valid for the duration of one Aggregate call
  75   // and is only stored on the class to avoid having to pass through every
  76   // function call.
  77
  78   // This is the set of surfaces referenced in the aggregation so far, used to
  79   // detect cycles.
  80   typedef std::set<SurfaceId> SurfaceSet;
  81   SurfaceSet referenced_surfaces_;
  82
  83   // For each Surface used in the last aggregation, gives the frame_index at
  84   // that time.
  85   SurfaceIndexMap previous_contained_surfaces_;
  86   SurfaceIndexMap contained_surfaces_;
  87
  88   // This is the pass list for the aggregated frame.
  89   RenderPassList* dest_pass_list_;
  90
  91   // Resource list for the aggregated frame.
  92   TransferableResourceArray* dest_resource_list_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
  95 };
  96
  97 }  // namespace cc
  98
  99 #endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_