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1 // Copyright (c) 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 #include "gpu/command_buffer/client/gpu_memory_buffer_tracker.h"
6 
7 #include "base/memory/scoped_ptr.h"
8 #include "gpu/command_buffer/client/gles2_implementation.h"
9 #include "gpu/command_buffer/client/gpu_control.h"
10 
11 namespace gpu {
12 namespace gles2 {
13 
GpuMemoryBufferTracker(GpuControl * gpu_control)14 GpuMemoryBufferTracker::GpuMemoryBufferTracker(GpuControl* gpu_control)
15     : gpu_control_(gpu_control) {
16 }
17 
~GpuMemoryBufferTracker()18 GpuMemoryBufferTracker::~GpuMemoryBufferTracker() {
19   while (!buffers_.empty()) {
20     RemoveBuffer(buffers_.begin()->first);
21   }
22 }
23 
CreateBuffer(size_t width,size_t height,int32 internalformat,int32 usage)24 int32 GpuMemoryBufferTracker::CreateBuffer(size_t width,
25                                            size_t height,
26                                            int32 internalformat,
27                                            int32 usage) {
28   int32 image_id = 0;
29   DCHECK(gpu_control_);
30   gfx::GpuMemoryBuffer* buffer = gpu_control_->CreateGpuMemoryBuffer(
31       width, height, internalformat, usage, &image_id);
32   if (!buffer)
33     return 0;
34 
35   std::pair<BufferMap::iterator, bool> result =
36       buffers_.insert(std::make_pair(image_id, buffer));
37   DCHECK(result.second);
38 
39   return image_id;
40 }
41 
GetBuffer(int32 image_id)42 gfx::GpuMemoryBuffer* GpuMemoryBufferTracker::GetBuffer(int32 image_id) {
43   BufferMap::iterator it = buffers_.find(image_id);
44   return (it != buffers_.end()) ? it->second : NULL;
45 }
46 
RemoveBuffer(int32 image_id)47 void GpuMemoryBufferTracker::RemoveBuffer(int32 image_id) {
48   BufferMap::iterator buffer_it = buffers_.find(image_id);
49   if (buffer_it != buffers_.end())
50     buffers_.erase(buffer_it);
51   DCHECK(gpu_control_);
52   gpu_control_->DestroyGpuMemoryBuffer(image_id);
53 }
54 
55 }  // namespace gles2
56 }  // namespace gpu
57