working copy of "zero_copy"

content/common/gpu/client/gpu_channel_host.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/common/gpu/client/gpu_channel_host.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
@@ skipping 35 matching lines @@
 bool GpuChannelHost::IsValidGpuMemoryBuffer(
     gfx::GpuMemoryBufferHandle handle) {
   switch (handle.type) {
     case gfx::SHARED_MEMORY_BUFFER:
 #if defined(OS_MACOSX)
     case gfx::IO_SURFACE_BUFFER:
 #endif
 #if defined(OS_ANDROID)
     case gfx::SURFACE_TEXTURE_BUFFER:
 #endif
+#if defined(OS_LINUX)
+    case gfx::DMA_BUFFER:
+#endif
       return true;
     default:
       return false;
   }
 }
 
 GpuChannelHost::GpuChannelHost(GpuChannelHostFactory* factory,
                                const gpu::GPUInfo& gpu_info)
     : factory_(factory),
       gpu_info_(gpu_info) {
@@ skipping 203 matching lines @@
                              channel_->GetPeerPID(),
                              &target_handle,
                              FILE_GENERIC_READ | FILE_GENERIC_WRITE,
                              0)) {
     return base::SharedMemory::NULLHandle();
   }
 
   return target_handle;
 #else
   int duped_handle = HANDLE_EINTR(dup(source_handle.fd));
+  //int duped_handle = source_handle.fd;
   if (duped_handle < 0)
     return base::SharedMemory::NULLHandle();
 
   return base::FileDescriptor(duped_handle, true);
 #endif
 }
 
 int32 GpuChannelHost::ReserveTransferBufferId() {
   return next_transfer_buffer_id_.GetNext();
 }
 
 gfx::GpuMemoryBufferHandle GpuChannelHost::ShareGpuMemoryBufferToGpuProcess(
     gfx::GpuMemoryBufferHandle source_handle) {
   switch (source_handle.type) {
+#if defined(OS_LINUX)
+    case gfx::DMA_BUFFER:
+#endif
     case gfx::SHARED_MEMORY_BUFFER: {
       gfx::GpuMemoryBufferHandle handle;
-      handle.type = gfx::SHARED_MEMORY_BUFFER;
+      handle.type = source_handle.type;
       handle.handle = ShareToGpuProcess(source_handle.handle);
+      //fprintf(stderr, "(%d -> %d)\n", source_handle.handle.fd, handle.handle.fd);
+      handle.card_handle = ShareToGpuProcess(source_handle.card_handle);
+      handle.stride = source_handle.stride;
       return handle;
     }
 #if defined(OS_MACOSX)
     case gfx::IO_SURFACE_BUFFER:
       return source_handle;
 #endif
 #if defined(OS_ANDROID)
     case gfx::SURFACE_TEXTURE_BUFFER:
       return source_handle;
 #endif
@@ skipping 83 matching lines @@
 
   listeners_.clear();
 }
 
 bool GpuChannelHost::MessageFilter::IsLost() const {
   AutoLock lock(lock_);
   return lost_;
 }
 
 }  // namespace content