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      1 // Copyright (c) 2012 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 CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_
      6 #define CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_
      7 
      8 #include <list>
      9 
     10 #include "base/basictypes.h"
     11 #include "content/common/content_export.h"
     12 #include "gpu/command_buffer/common/gpu_memory_allocation.h"
     13 #include "gpu/command_buffer/service/memory_tracking.h"
     14 #include "ui/gfx/size.h"
     15 
     16 namespace content {
     17 
     18 class GpuMemoryManager;
     19 class GpuMemoryTrackingGroup;
     20 
     21 // The interface that the GPU memory manager uses to manipulate a client (to
     22 // send it allocation information and query its properties).
     23 class CONTENT_EXPORT GpuMemoryManagerClient {
     24  public:
     25   virtual ~GpuMemoryManagerClient() {}
     26 
     27   // Returns surface size.
     28   virtual gfx::Size GetSurfaceSize() const = 0;
     29 
     30   // Returns the memory tracker for this stub.
     31   virtual gpu::gles2::MemoryTracker* GetMemoryTracker() const = 0;
     32 
     33   // Sets buffer usage depending on Memory Allocation
     34   virtual void SetMemoryAllocation(
     35       const gpu::MemoryAllocation& allocation) = 0;
     36 
     37   virtual void SuggestHaveFrontBuffer(bool suggest_have_frontbuffer) = 0;
     38 
     39   // Returns in bytes the total amount of GPU memory for the GPU which this
     40   // context is currently rendering on. Returns false if no extension exists
     41   // to get the exact amount of GPU memory.
     42   virtual bool GetTotalGpuMemory(uint64* bytes) = 0;
     43 };
     44 
     45 // The state associated with a GPU memory manager client. This acts as the
     46 // handle through which the client interacts with the GPU memory manager.
     47 class CONTENT_EXPORT GpuMemoryManagerClientState {
     48  public:
     49   ~GpuMemoryManagerClientState();
     50   void SetVisible(bool visible);
     51 
     52  private:
     53   friend class GpuMemoryManager;
     54 
     55   GpuMemoryManagerClientState(GpuMemoryManager* memory_manager,
     56                               GpuMemoryManagerClient* client,
     57                               GpuMemoryTrackingGroup* tracking_group,
     58                               bool has_surface,
     59                               bool visible);
     60 
     61   // The memory manager this client is hanging off of.
     62   GpuMemoryManager* memory_manager_;
     63 
     64   // The client to send allocations to.
     65   GpuMemoryManagerClient* client_;
     66 
     67   // The tracking group for this client.
     68   GpuMemoryTrackingGroup* tracking_group_;
     69 
     70   // Offscreen commandbuffers will not have a surface.
     71   const bool has_surface_;
     72 
     73   // Whether or not this client is visible.
     74   bool visible_;
     75 
     76   // If the client has a surface, then this is an iterator in the
     77   // clients_visible_mru_ if this client is visible and
     78   // clients_nonvisible_mru_ if this is non-visible. Otherwise this is an
     79   // iterator in clients_nonsurface_.
     80   std::list<GpuMemoryManagerClientState*>::iterator list_iterator_;
     81   bool list_iterator_valid_;
     82 
     83   // Set to disable allocating a frontbuffer or to disable allocations
     84   // for clients that don't have surfaces.
     85   bool hibernated_;
     86 };
     87 
     88 }  // namespace content
     89 
     90 #endif  // CONTENT_COMMON_GPU_GPU_MEMORY_MANAGER_CLIENT_H_
     91