content/common/gpu/client/gpu_memory_buffer_impl_win.cc

   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 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
   6
   7 #include "content/common/gpu/client/gpu_memory_buffer_impl_shm.h"
   8
   9 namespace content {
  10
  11 // static
  12 scoped_ptr<GpuMemoryBufferImpl> GpuMemoryBufferImpl::Create(
  13     const gfx::Size& size,
  14     unsigned internalformat,
  15     unsigned usage) {
  16   if (GpuMemoryBufferImplShm::IsConfigurationSupported(
  17           size, internalformat, usage)) {
  18     scoped_ptr<GpuMemoryBufferImplShm> buffer(
  19         new GpuMemoryBufferImplShm(size, internalformat));
  20     if (!buffer->Initialize())
  21       return scoped_ptr<GpuMemoryBufferImpl>();
  22
  23     return buffer.PassAs<GpuMemoryBufferImpl>();
  24   }
  25
  26   return scoped_ptr<GpuMemoryBufferImpl>();
  27 }
  28
  29 // static
  30 void GpuMemoryBufferImpl::AllocateForChildProcess(
  31     const gfx::Size& size,
  32     unsigned internalformat,
  33     unsigned usage,
  34     base::ProcessHandle child_process,
  35     const AllocationCallback& callback) {
  36   if (GpuMemoryBufferImplShm::IsConfigurationSupported(
  37           size, internalformat, usage)) {
  38     GpuMemoryBufferImplShm::AllocateSharedMemoryForChildProcess(
  39         size, internalformat, child_process, callback);
  40     return;
  41   }
  42
  43   callback.Run(gfx::GpuMemoryBufferHandle());
  44 }
  45
  46 // static
  47 scoped_ptr<GpuMemoryBufferImpl> GpuMemoryBufferImpl::CreateFromHandle(
  48     gfx::GpuMemoryBufferHandle handle,
  49     const gfx::Size& size,
  50     unsigned internalformat) {
  51   switch (handle.type) {
  52     case gfx::SHARED_MEMORY_BUFFER: {
  53       scoped_ptr<GpuMemoryBufferImplShm> buffer(
  54           new GpuMemoryBufferImplShm(size, internalformat));
  55       if (!buffer->InitializeFromHandle(handle))
  56         return scoped_ptr<GpuMemoryBufferImpl>();
  57
  58       return buffer.PassAs<GpuMemoryBufferImpl>();
  59     }
  60     default:
  61       return scoped_ptr<GpuMemoryBufferImpl>();
  62   }
  63 }
  64
  65 }  // namespace content