Plumb GpuMemoryBuffer allocation to GPU process.

content/browser/gpu/browser_gpu_channel_host_factory.cc

 // Copyright (c) 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.
 
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread_restrictions.h"
@@ skipping 190 matching lines @@
 
 void BrowserGpuChannelHostFactory::Terminate() {
   DCHECK(instance_);
   delete instance_;
   instance_ = NULL;
 }
 
 BrowserGpuChannelHostFactory::BrowserGpuChannelHostFactory()
     : gpu_client_id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()),
       shutdown_event_(new base::WaitableEvent(true, false)),
-      gpu_host_id_(0) {
+      gpu_host_id_(0),
+      current_create_gpu_memory_buffer_request_id_(0) {
 }
 
 BrowserGpuChannelHostFactory::~BrowserGpuChannelHostFactory() {
   DCHECK(IsMainThread());
   if (pending_request_)
     pending_request_->Cancel();
   for (size_t n = 0; n < established_callbacks_.size(); n++)
     established_callbacks_[n].Run();
   shutdown_event_->Signal();
 }
@@ skipping 240 matching lines @@
                                        target_task_runner);
   filter->AddRoute(MSG_ROUTING_CONTROL, handler);
 
   GetIOLoopProxy()->PostTask(
       FROM_HERE,
       base::Bind(&BrowserGpuChannelHostFactory::AddFilterOnIO,
                  gpu_host_id_,
                  filter));
 }
 
+void BrowserGpuChannelHostFactory::CreateGpuMemoryBuffer(
+    const gfx::GpuMemoryBufferHandle& handle,
+    const gfx::Size& size,
+    unsigned internalformat,
+    unsigned usage,
+    const CreateGpuMemoryBufferCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  int32 request_id = current_create_gpu_memory_buffer_request_id_++;
+  create_gpu_memory_buffer_requests_[request_id] = callback;
+  GetIOLoopProxy()->PostTask(
+      FROM_HERE,
+      base::Bind(&BrowserGpuChannelHostFactory::CreateGpuMemoryBufferOnIO,
+                 base::Unretained(this),
+                 handle,
+                 size,
+                 internalformat,
+                 usage,
+                 request_id));
+}
+
+void BrowserGpuChannelHostFactory::DestroyGpuMemoryBuffer(
+    const gfx::GpuMemoryBufferHandle& handle,
+    int32 sync_point) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  GetIOLoopProxy()->PostTask(
+      FROM_HERE,
+      base::Bind(&BrowserGpuChannelHostFactory::DestroyGpuMemoryBufferOnIO,
+                 base::Unretained(this),
+                 handle,
+                 sync_point));
+}
+
+void BrowserGpuChannelHostFactory::CreateGpuMemoryBufferOnIO(
+    const gfx::GpuMemoryBufferHandle& handle,
+    const gfx::Size& size,
+    unsigned internalformat,
+    unsigned usage,
+    int32 request_id) {
+  GpuProcessHost* host = GpuProcessHost::FromID(gpu_host_id_);
+  if (!host) {
+    GpuMemoryBufferCreatedOnIO(request_id, gfx::GpuMemoryBufferHandle());
+    return;
+  }
+
+  host->CreateGpuMemoryBuffer(
+      handle,
+      size,
+      internalformat,
+      usage,
+      base::Bind(&BrowserGpuChannelHostFactory::GpuMemoryBufferCreatedOnIO,
+                 request_id));
+}
+
+// static
+void BrowserGpuChannelHostFactory::GpuMemoryBufferCreatedOnIO(
+    int32 request_id,
+    const gfx::GpuMemoryBufferHandle& handle) {
+  BrowserThread::PostTask(
+      BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(&BrowserGpuChannelHostFactory::OnGpuMemoryBufferCreated,
+                 request_id,
+                 handle));
+}
+
+// static
+void BrowserGpuChannelHostFactory::OnGpuMemoryBufferCreated(
+    int32 request_id,
+    const gfx::GpuMemoryBufferHandle& handle) {
+  DCHECK(instance_);

[reveman, 2014/06/10 13:39:00]

can you avoid the use of |instance_| here by making this and the above function
non-static?

[alexst (slow to review), 2014/06/10 14:22:44]

Done.

+  CreateGpuMemoryBufferCallbackMap::iterator iter =
+      instance_->create_gpu_memory_buffer_requests_.find(request_id);
+  DCHECK(iter != instance_->create_gpu_memory_buffer_requests_.end());
+  iter->second.Run(handle);
+  instance_->create_gpu_memory_buffer_requests_.erase(iter);
+}
+
+void BrowserGpuChannelHostFactory::DestroyGpuMemoryBufferOnIO(
+    const gfx::GpuMemoryBufferHandle& handle,
+    int32 sync_point) {
+  GpuProcessHost* host = GpuProcessHost::FromID(gpu_host_id_);
+  if (!host) {
+    return;
+  }
+
+  host->DestroyGpuMemoryBuffer(handle, sync_point);
+}
+
 }  // namespace content