Revert "Delete CC."

cc/surfaces/surface_aggregator.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CC_SURFACES_SURFACE_AGGREGATOR_H_
+#define CC_SURFACES_SURFACE_AGGREGATOR_H_
+
+#include <set>
+
+#include "base/containers/hash_tables.h"
+#include "base/containers/scoped_ptr_hash_map.h"
+#include "base/memory/scoped_ptr.h"
+#include "cc/quads/render_pass.h"
+#include "cc/resources/transferable_resource.h"
+#include "cc/surfaces/surface_id.h"
+#include "cc/surfaces/surfaces_export.h"
+
+namespace cc {
+
+class CompositorFrame;
+class DelegatedFrameData;
+class ResourceProvider;
+class Surface;
+class SurfaceDrawQuad;
+class SurfaceManager;
+
+class CC_SURFACES_EXPORT SurfaceAggregator {
+ public:
+  typedef base::hash_map<SurfaceId, int> SurfaceIndexMap;
+
+  SurfaceAggregator(SurfaceManager* manager, ResourceProvider* provider);
+  ~SurfaceAggregator();
+
+  scoped_ptr<CompositorFrame> Aggregate(SurfaceId surface_id);
+  void ReleaseResources(SurfaceId surface_id);
+  SurfaceIndexMap& previous_contained_surfaces() {
+    return previous_contained_surfaces_;
+  }
+
+ private:
+  struct ClipData {
+    ClipData() : is_clipped(false) {}
+    ClipData(bool is_clipped, const gfx::Rect& rect)
+        : is_clipped(is_clipped), rect(rect) {}
+
+    bool is_clipped;
+    gfx::Rect rect;
+  };
+
+  ClipData CalculateClipRect(const ClipData& surface_clip,
+                             const ClipData& quad_clip,
+                             const gfx::Transform& content_to_target_transform);
+
+  RenderPassId RemapPassId(RenderPassId surface_local_pass_id,
+                           SurfaceId surface_id);
+
+  void HandleSurfaceQuad(const SurfaceDrawQuad* surface_quad,
+                         const gfx::Transform& content_to_target_transform,
+                         const ClipData& clip_rect,
+                         RenderPass* dest_pass);
+  void CopySharedQuadState(const SharedQuadState* source_sqs,
+                           const gfx::Transform& content_to_target_transform,
+                           const ClipData& clip_rect,
+                           RenderPass* dest_render_pass);
+  void CopyQuadsToPass(const QuadList& source_quad_list,
+                       const SharedQuadStateList& source_shared_quad_state_list,
+                       const gfx::Transform& content_to_target_transform,
+                       const ClipData& clip_rect,
+                       RenderPass* dest_pass,
+                       SurfaceId surface_id);
+  void CopyPasses(const DelegatedFrameData* frame_data, Surface* surface);
+
+  // Remove Surfaces that were referenced before but aren't currently
+  // referenced from the ResourceProvider.
+  void RemoveUnreferencedChildren();
+
+  bool TakeResources(Surface* surface,
+                     const DelegatedFrameData* frame_data,
+                     RenderPassList* render_pass_list);
+  int ChildIdForSurface(Surface* surface);
+  gfx::Rect DamageRectForSurface(const Surface* surface,
+                                 const RenderPass& source,
+                                 const gfx::Rect& full_rect);
+
+  SurfaceManager* manager_;
+  ResourceProvider* provider_;
+
+  class RenderPassIdAllocator;
+  typedef base::ScopedPtrHashMap<SurfaceId, scoped_ptr<RenderPassIdAllocator>>
+      RenderPassIdAllocatorMap;
+  RenderPassIdAllocatorMap render_pass_allocator_map_;
+  int next_render_pass_id_;
+
+  typedef base::hash_map<SurfaceId, int> SurfaceToResourceChildIdMap;
+  SurfaceToResourceChildIdMap surface_id_to_resource_child_id_;
+
+  // The following state is only valid for the duration of one Aggregate call
+  // and is only stored on the class to avoid having to pass through every
+  // function call.
+
+  // This is the set of surfaces referenced in the aggregation so far, used to
+  // detect cycles.
+  typedef std::set<SurfaceId> SurfaceSet;
+  SurfaceSet referenced_surfaces_;
+
+  // For each Surface used in the last aggregation, gives the frame_index at
+  // that time.
+  SurfaceIndexMap previous_contained_surfaces_;
+  SurfaceIndexMap contained_surfaces_;
+
+  // This is the pass list for the aggregated frame.
+  RenderPassList* dest_pass_list_;
+
+  // Resource list for the aggregated frame.
+  TransferableResourceArray* dest_resource_list_;
+
+  DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
+};
+
+}  // namespace cc
+
+#endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_