Partial raster for GPU

cc/resources/resource_pool.h

 // Copyright 2012 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_RESOURCES_RESOURCE_POOL_H_
 #define CC_RESOURCES_RESOURCE_POOL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 24 matching lines @@
   static std::unique_ptr<ResourcePool> Create(
       ResourceProvider* resource_provider,
       base::SingleThreadTaskRunner* task_runner) {
     return base::WrapUnique(
         new ResourcePool(resource_provider, task_runner, false));
   }
 
   ~ResourcePool() override;
 
   Resource* AcquireResource(const gfx::Size& size, ResourceFormat format);
-  Resource* TryAcquireResourceWithContentId(uint64_t content_id);
-  void ReleaseResource(Resource* resource, uint64_t content_id);
+
+  // Tries to acquire the resource with |previous_content_id| for us in partial
+  // raster. If successful, this function will retun the invalidated rect which
+  // must be re-rastered in |total_invalidated_rect|.
+  Resource* TryAcquireResourceForPartialRaster(
+      uint64_t new_content_id,
+      const gfx::Rect& new_invalidated_rect,
+      uint64_t previous_content_id,
+      gfx::Rect* total_invalidated_rect);
+
+  // Called when a resource's content has been fully replaced (and is completely
+  // valid). Updates the resource's content ID to its new value.
+  void OnContentReplaced(ResourceId resource_id, uint64_t content_id);
+  void ReleaseResource(Resource* resource);
 
   void SetResourceUsageLimits(size_t max_memory_usage_bytes,
                               size_t max_resource_count);
 
   void ReduceResourceUsage();
   void CheckBusyResources();
 
   size_t memory_usage_bytes() const { return in_use_memory_usage_bytes_; }
   size_t resource_count() const { return in_use_resources_.size(); }
 
@@ skipping 31 matching lines @@
     void OnMemoryDump(base::trace_event::ProcessMemoryDump* pmd,
                       const ResourceProvider* resource_provider,
                       bool is_free) const;
 
     uint64_t content_id() const { return content_id_; }
     void set_content_id(uint64_t content_id) { content_id_ = content_id; }
 
     base::TimeTicks last_usage() const { return last_usage_; }
     void set_last_usage(base::TimeTicks time) { last_usage_ = time; }
 
+    gfx::Rect invalidated_rect() const { return invalidated_rect_; }
+    void set_invalidated_rect(const gfx::Rect& invalidated_rect) {
+      invalidated_rect_ = invalidated_rect;
+    }
+
    private:
     explicit PoolResource(ResourceProvider* resource_provider)
         : ScopedResource(resource_provider), content_id_(0) {}
     uint64_t content_id_;
     base::TimeTicks last_usage_;
+    gfx::Rect invalidated_rect_;
   };
 
   void DidFinishUsingResource(std::unique_ptr<PoolResource> resource);
   void DeleteResource(std::unique_ptr<PoolResource> resource);
 
   // Functions which manage periodic eviction of expired resources.
   void ScheduleEvictExpiredResourcesIn(base::TimeDelta time_from_now);
   void EvictExpiredResources();
   void EvictResourcesNotUsedSince(base::TimeTicks time_limit);
   bool HasEvictableResources() const;
   base::TimeTicks GetUsageTimeForLRUResource() const;
 
   ResourceProvider* resource_provider_;
   bool use_gpu_memory_buffers_;
   size_t max_memory_usage_bytes_;
   size_t max_resource_count_;
   size_t in_use_memory_usage_bytes_;
   size_t total_memory_usage_bytes_;
   size_t total_resource_count_;
 
   // Holds most recently used resources at the front of the queue.
   using ResourceDeque = std::deque<std::unique_ptr<PoolResource>>;
   ResourceDeque unused_resources_;
   ResourceDeque busy_resources_;
 
-  std::map<ResourceId, std::unique_ptr<PoolResource>> in_use_resources_;
+  using InUseResourceMap = std::map<ResourceId, std::unique_ptr<PoolResource>>;
+  InUseResourceMap in_use_resources_;
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   bool evict_expired_resources_pending_;
   base::TimeDelta resource_expiration_delay_;
 
   base::WeakPtrFactory<ResourcePool> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourcePool);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_POOL_H_