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1 // Copyright 2013 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_CLIENT_GPU_MEMORY_BUFFER_IMPL_SHM_H_ | |
6 #define CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_SHM_H_ | |
7 | |
8 #include "content/common/gpu/client/gpu_memory_buffer_impl.h" | |
9 | |
10 namespace content { | |
11 | |
12 // Implementation of GPU memory buffer based on shared memory. | |
13 class GpuMemoryBufferImplShm : public GpuMemoryBufferImpl { | |
14 public: | |
15 GpuMemoryBufferImplShm(const gfx::Size& size, unsigned internalformat); | |
16 virtual ~GpuMemoryBufferImplShm(); | |
17 | |
18 // Allocates a shared memory backed GPU memory buffer with |size| and | |
19 // |internalformat| for use by |child_process|. | |
20 static void AllocateSharedMemoryForChildProcess( | |
21 const gfx::Size& size, | |
22 unsigned internalformat, | |
23 base::ProcessHandle child_process, | |
24 const AllocationCallback& callback); | |
25 | |
26 static bool IsLayoutSupported(const gfx::Size& size, unsigned internalformat); | |
27 static bool IsUsageSupported(unsigned usage); | |
28 static bool IsConfigurationSupported(const gfx::Size& size, | |
29 unsigned internalformat, | |
30 unsigned usage); | |
31 | |
32 bool Initialize(); | |
33 bool InitializeFromHandle(gfx::GpuMemoryBufferHandle handle); | |
34 | |
35 // Overridden from gfx::GpuMemoryBuffer: | |
36 virtual void* Map() OVERRIDE; | |
37 virtual void Unmap() OVERRIDE; | |
38 virtual uint32 GetStride() const OVERRIDE; | |
39 virtual gfx::GpuMemoryBufferHandle GetHandle() const OVERRIDE; | |
40 | |
41 private: | |
42 scoped_ptr<base::SharedMemory> shared_memory_; | |
43 | |
44 DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplShm); | |
45 }; | |
46 | |
47 } // namespace content | |
48 | |
49 #endif // CONTENT_COMMON_GPU_CLIENT_GPU_MEMORY_BUFFER_IMPL_SHM_H_ | |
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