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/draw_quad.h"
  14 #include "cc/quads/render_pass.h"
  15 #include "cc/resources/transferable_resource.h"
  16 #include "cc/surfaces/surface_id.h"
  17 #include "cc/surfaces/surfaces_export.h"
  18
  19 namespace cc {
  20
  21 class CompositorFrame;
  22 class DelegatedFrameData;
  23 class ResourceProvider;
  24 class Surface;
  25 class SurfaceDrawQuad;
  26 class SurfaceManager;
  27
  28 class CC_SURFACES_EXPORT SurfaceAggregator {
  29  public:
  30   typedef base::hash_map<SurfaceId, int> SurfaceIndexMap;
  31
  32   SurfaceAggregator(SurfaceManager* manager,
  33                     ResourceProvider* provider,
  34                     bool aggregate_only_damaged);
  35   ~SurfaceAggregator();
  36
  37   scoped_ptr<CompositorFrame> Aggregate(SurfaceId surface_id);
  38   void ReleaseResources(SurfaceId surface_id);
  39   SurfaceIndexMap& previous_contained_surfaces() {
  40     return previous_contained_surfaces_;
  41   }
  42   void SetFullDamageForSurface(SurfaceId surface_id);
  43
  44  private:
  45   struct ClipData {
  46     ClipData() : is_clipped(false) {}
  47     ClipData(bool is_clipped, const gfx::Rect& rect)
  48         : is_clipped(is_clipped), rect(rect) {}
  49
  50     bool is_clipped;
  51     gfx::Rect rect;
  52   };
  53
  54   ClipData CalculateClipRect(const ClipData& surface_clip,
  55                              const ClipData& quad_clip,
  56                              const gfx::Transform& target_transform);
  57
  58   RenderPassId RemapPassId(RenderPassId surface_local_pass_id,
  59                            SurfaceId surface_id);
  60
  61   void HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
  62                          const gfx::Transform& target_transform,
  63                          const ClipData& clip_rect,
  64                          RenderPass* dest_pass);
  65   SharedQuadState* CopySharedQuadState(const SharedQuadState* source_sqs,
  66                                        const gfx::Transform& target_transform,
  67                                        const ClipData& clip_rect,
  68                                        RenderPass* dest_render_pass);
  69   void CopyQuadsToPass(
  70       const QuadList& source_quad_list,
  71       const SharedQuadStateList& source_shared_quad_state_list,
  72       const base::hash_map<ResourceId, ResourceId>& resource_to_child_map,
  73       const gfx::Transform& target_transform,
  74       const ClipData& clip_rect,
  75       RenderPass* dest_pass,
  76       SurfaceId surface_id);
  77   gfx::Rect PrewalkTree(SurfaceId surface_id);
  78   void CopyPasses(const DelegatedFrameData* frame_data, Surface* surface);
  79
  80   // Remove Surfaces that were referenced before but aren't currently
  81   // referenced from the ResourceProvider.
  82   void RemoveUnreferencedChildren();
  83
  84   int ChildIdForSurface(Surface* surface);
  85   gfx::Rect DamageRectForSurface(const Surface* surface,
  86                                  const RenderPass& source,
  87                                  const gfx::Rect& full_rect);
  88
  89   SurfaceManager* manager_;
  90   ResourceProvider* provider_;
  91
  92   class RenderPassIdAllocator;
  93   typedef base::ScopedPtrHashMap<SurfaceId, scoped_ptr<RenderPassIdAllocator>>
  94       RenderPassIdAllocatorMap;
  95   RenderPassIdAllocatorMap render_pass_allocator_map_;
  96   int next_render_pass_id_;
  97   const bool aggregate_only_damaged_;
  98
  99   typedef base::hash_map<SurfaceId, int> SurfaceToResourceChildIdMap;
 100   SurfaceToResourceChildIdMap surface_id_to_resource_child_id_;
 101
 102   // The following state is only valid for the duration of one Aggregate call
 103   // and is only stored on the class to avoid having to pass through every
 104   // function call.
 105
 106   // This is the set of surfaces referenced in the aggregation so far, used to
 107   // detect cycles.
 108   typedef std::set<SurfaceId> SurfaceSet;
 109   SurfaceSet referenced_surfaces_;
 110
 111   // For each Surface used in the last aggregation, gives the frame_index at
 112   // that time.
 113   SurfaceIndexMap previous_contained_surfaces_;
 114   SurfaceIndexMap contained_surfaces_;
 115
 116   // After surface validation, every Surface in this set is valid.
 117   base::hash_set<SurfaceId> valid_surfaces_;
 118
 119   // This is the pass list for the aggregated frame.
 120   RenderPassList* dest_pass_list_;
 121
 122   // The root damage rect of the currently-aggregating frame.
 123   gfx::Rect root_damage_rect_;
 124
 125   // True if the frame that's currently being aggregated has copy requests.
 126   // This is valid during Aggregate after PrewalkTree is called.
 127   bool has_copy_requests_;
 128
 129   // Resource list for the aggregated frame.
 130   TransferableResourceArray* dest_resource_list_;
 131
 132   DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
 133 };
 134
 135 }  // namespace cc
 136
 137 #endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_