working copy of "zero_copy"

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
===================================================================
--- content/browser/renderer_host/render_process_host_impl.cc	(revision 277402)
+++ content/browser/renderer_host/render_process_host_impl.cc	(working copy)
@@ -177,6 +177,10 @@
 #include "content/common/media/media_stream_messages.h"
 #endif
 
+#if defined(OS_LINUX)
+#include "content/browser/gpu/dri_buffer_manager.h"
+#endif
+
 extern bool g_exited_main_message_loop;
 
 static const char* kSiteProcessMapKeyName = "content_site_process_map";
@@ -2287,6 +2291,26 @@
   }
 #endif
 
+#if defined(OS_LINUX)
+  gfx::GpuMemoryBufferHandle handle;
+
+  uint64 stride = static_cast<uint64>(width) *
+      GpuMemoryBufferImpl::BytesPerPixel(internalformat);
+  if (stride > std::numeric_limits<uint32>::max()) {
+    handle.type = gfx::EMPTY_BUFFER;
+    GpuMemoryBufferAllocated(reply, handle);
+    return;
+  }
+  //if (!buffer_manager_)
+    //buffer_manager_ = new DRIBufferManager();
+  handle.type = gfx::DMA_BUFFER;
+  DRIBufferManager::CreateBuffer(width, height, handle);
+  if (handle.handle.fd > 0 && handle.card_handle.fd > 0) {
+    GpuMemoryBufferAllocated(reply, handle);
+    return;
+  }
+#endif
+
   GpuMemoryBufferImpl::AllocateForChildProcess(
       gfx::Size(width, height),
       internalformat,