Add Intel DRM backed GpuMemoryBuffer implementation.

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/threading/thread_restrictions.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl_shm.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_client.h"
 #include "ipc/ipc_forwarding_message_filter.h"
 
+#if defined(OS_LINUX)
+#include "content/common/gpu/client/gpu_memory_buffer_impl_intel_drm.h"
+#include "ui/gl/gl_implementation.h"
+#endif
+
 namespace content {
 
 BrowserGpuChannelHostFactory* BrowserGpuChannelHostFactory::instance_ = NULL;
 
 BrowserGpuChannelHostFactory::CreateRequest::CreateRequest()
     : event(true, false),
       gpu_host_id(0),
       route_id(MSG_ROUTING_NONE) {
 }
 
@@ skipping 344 matching lines @@
 }
 
 scoped_ptr<gfx::GpuMemoryBuffer>
     BrowserGpuChannelHostFactory::AllocateGpuMemoryBuffer(
         size_t width,
         size_t height,
         unsigned internalformat) {
   if (!GpuMemoryBufferImpl::IsFormatValid(internalformat))
     return scoped_ptr<gfx::GpuMemoryBuffer>();
 
+#if defined(OS_LINUX)
+  // Intel DRM implementation of gpu memory buffer is limited to EGLGLES2 as we
+  // currently depend on EGL_EXT_image_dma_buf_import to use this type of buffer
+  // on the GPU side.
+  bool is_gl_implementation_supported_by_intel_drm =
+      gfx::GetGLImplementation() == gfx::kGLImplementationEGLGLES2;
+
+  if (is_gl_implementation_supported_by_intel_drm &&
+      GpuMemoryBufferImplIntelDRM::IsFormatSupported(internalformat)) {
+    drm_intel_bo* buffer_object =
+        GpuMemoryBufferImplIntelDRM::CreateBufferObject(
+            gfx::Size(width, height), internalformat);
+    if (buffer_object) {
+      scoped_ptr<GpuMemoryBufferImplIntelDRM> buffer(
+          new GpuMemoryBufferImplIntelDRM(gfx::Size(width, height),
+                                          internalformat));
+      if (buffer->InitializeFromBufferObject(buffer_object))
+        return buffer.PassAs<gfx::GpuMemoryBuffer>();
+    }
+  }
+#endif
+
   size_t size = width * height *
       GpuMemoryBufferImpl::BytesPerPixel(internalformat);
   scoped_ptr<base::SharedMemory> shm(new base::SharedMemory());
   if (!shm->CreateAnonymous(size))
     return scoped_ptr<gfx::GpuMemoryBuffer>();
 
   scoped_ptr<GpuMemoryBufferImplShm> buffer(
       new GpuMemoryBufferImplShm(gfx::Size(width, height), internalformat));
   if (!buffer->InitializeFromSharedMemory(shm.Pass()))
     return scoped_ptr<gfx::GpuMemoryBuffer>();
@@ skipping 29 matching lines @@
   filter->AddRoute(MSG_ROUTING_CONTROL, handler);
 
   GetIOLoopProxy()->PostTask(
       FROM_HERE,
       base::Bind(&BrowserGpuChannelHostFactory::AddFilterOnIO,
                  gpu_host_id_,
                  filter));
 }
 
 }  // namespace content