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, ResourceProvider* provider);
  33   ~SurfaceAggregator();
  34
  35   scoped_ptr<CompositorFrame> Aggregate(SurfaceId surface_id);
  36   void ReleaseResources(SurfaceId surface_id);
  37   SurfaceIndexMap& previous_contained_surfaces() {
  38     return previous_contained_surfaces_;
  39   }
  40   void SetFullDamageForSurface(SurfaceId surface_id);
  41
  42  private:
  43   struct ClipData {
  44     ClipData() : is_clipped(false) {}
  45     ClipData(bool is_clipped, const gfx::Rect& rect)
  46         : is_clipped(is_clipped), rect(rect) {}
  47
  48     bool is_clipped;
  49     gfx::Rect rect;
  50   };
  51
  52   ClipData CalculateClipRect(const ClipData& surface_clip,
  53                              const ClipData& quad_clip,
  54                              const gfx::Transform& target_transform);
  55
  56   RenderPassId RemapPassId(RenderPassId surface_local_pass_id,
  57                            SurfaceId surface_id);
  58
  59   void HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
  60                          const gfx::Transform& target_transform,
  61                          const ClipData& clip_rect,
  62                          RenderPass* dest_pass);
  63   void CopySharedQuadState(const SharedQuadState* source_sqs,
  64                            const gfx::Transform& target_transform,
  65                            const ClipData& clip_rect,
  66                            RenderPass* dest_render_pass);
  67   void CopyQuadsToPass(
  68       const QuadList& source_quad_list,
  69       const SharedQuadStateList& source_shared_quad_state_list,
  70       const base::hash_map<ResourceId, ResourceId>& resource_to_child_map,
  71       const gfx::Transform& target_transform,
  72       const ClipData& clip_rect,
  73       RenderPass* dest_pass,
  74       SurfaceId surface_id);
  75   void CopyPasses(const DelegatedFrameData* frame_data, Surface* surface);
  76
  77   // Remove Surfaces that were referenced before but aren't currently
  78   // referenced from the ResourceProvider.
  79   void RemoveUnreferencedChildren();
  80
  81   bool ValidateResources(Surface* surface,
  82                          const DelegatedFrameData* frame_data);
  83   int ChildIdForSurface(Surface* surface);
  84   gfx::Rect DamageRectForSurface(const Surface* surface,
  85                                  const RenderPass& source,
  86                                  const gfx::Rect& full_rect);
  87
  88   SurfaceManager* manager_;
  89   ResourceProvider* provider_;
  90
  91   class RenderPassIdAllocator;
  92   typedef base::ScopedPtrHashMap<SurfaceId, scoped_ptr<RenderPassIdAllocator>>
  93       RenderPassIdAllocatorMap;
  94   RenderPassIdAllocatorMap render_pass_allocator_map_;
  95   int next_render_pass_id_;
  96
  97   typedef base::hash_map<SurfaceId, int> SurfaceToResourceChildIdMap;
  98   SurfaceToResourceChildIdMap surface_id_to_resource_child_id_;
  99
 100   // The following state is only valid for the duration of one Aggregate call
 101   // and is only stored on the class to avoid having to pass through every
 102   // function call.
 103
 104   // This is the set of surfaces referenced in the aggregation so far, used to
 105   // detect cycles.
 106   typedef std::set<SurfaceId> SurfaceSet;
 107   SurfaceSet referenced_surfaces_;
 108
 109   // For each Surface used in the last aggregation, gives the frame_index at
 110   // that time.
 111   SurfaceIndexMap previous_contained_surfaces_;
 112   SurfaceIndexMap contained_surfaces_;
 113
 114   // This is the pass list for the aggregated frame.
 115   RenderPassList* dest_pass_list_;
 116
 117   // Resource list for the aggregated frame.
 118   TransferableResourceArray* dest_resource_list_;
 119
 120   DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
 121 };
 122
 123 }  // namespace cc
 124
 125 #endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_