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                          float opacity,
  45                          RenderPass* dest_pass);
  46   void CopySharedQuadState(const SharedQuadState* source_sqs,
  47                            const gfx::Transform& content_to_target_transform,
  48                            RenderPass* dest_render_pass);
  49   void CopyQuadsToPass(const QuadList& source_quad_list,
  50                        const SharedQuadStateList& source_shared_quad_state_list,
  51                        const gfx::Transform& content_to_target_transform,
  52                        float opacity,
  53                        RenderPass* dest_pass,
  54                        SurfaceId surface_id);
  55   void CopyPasses(const DelegatedFrameData* frame_data, Surface* surface);
  56
  57   // Remove Surfaces that were referenced before but aren't currently
  58   // referenced from the ResourceProvider.
  59   void RemoveUnreferencedChildren();
  60
  61   bool TakeResources(Surface* surface,
  62                      const DelegatedFrameData* frame_data,
  63                      RenderPassList* render_pass_list);
  64   int ChildIdForSurface(Surface* surface);
  65   gfx::Rect DamageRectForSurface(const Surface* surface,
  66                                  const RenderPass& source);
  67
  68   SurfaceManager* manager_;
  69   ResourceProvider* provider_;
  70
  71   class RenderPassIdAllocator;
  72   typedef base::ScopedPtrHashMap<SurfaceId, RenderPassIdAllocator>
  73       RenderPassIdAllocatorMap;
  74   RenderPassIdAllocatorMap render_pass_allocator_map_;
  75   int next_render_pass_id_;
  76
  77   typedef base::hash_map<SurfaceId, int> SurfaceToResourceChildIdMap;
  78   SurfaceToResourceChildIdMap surface_id_to_resource_child_id_;
  79
  80   // The following state is only valid for the duration of one Aggregate call
  81   // and is only stored on the class to avoid having to pass through every
  82   // function call.
  83
  84   // This is the set of surfaces referenced in the aggregation so far, used to
  85   // detect cycles.
  86   typedef std::set<SurfaceId> SurfaceSet;
  87   SurfaceSet referenced_surfaces_;
  88
  89   // For each Surface used in the last aggregation, gives the frame_index at
  90   // that time.
  91   SurfaceIndexMap previous_contained_surfaces_;
  92   SurfaceIndexMap contained_surfaces_;
  93
  94   // This is the pass list for the aggregated frame.
  95   RenderPassList* dest_pass_list_;
  96
  97   // Resource list for the aggregated frame.
  98   TransferableResourceArray* dest_resource_list_;
  99
 100   DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
 101 };
 102
 103 }  // namespace cc
 104
 105 #endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_