Add multi-process GpuMemoryBuffer framework.

content/common/gpu/gpu_messages.h

 // 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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <string>
 #include <vector>
 
 #include "base/memory/shared_memory.h"
 #include "content/common/content_export.h"
 #include "content/common/gpu/gpu_memory_allocation.h"
 #include "content/common/gpu/gpu_memory_uma_stats.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
 #include "content/common/gpu/gpu_rendering_stats.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/gpu_memory_stats.h"
 #include "gpu/command_buffer/common/command_buffer.h"
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/common/mailbox.h"
 #include "gpu/config/gpu_info.h"
 #include "gpu/ipc/gpu_command_buffer_traits.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message_macros.h"
 #include "media/base/video_frame.h"
 #include "media/video/video_decode_accelerator.h"
 #include "media/video/video_encode_accelerator.h"
 #include "ui/events/latency_info.h"
+#include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gl/gpu_preference.h"
 
 #if defined(OS_ANDROID)
 #include "content/common/android/surface_texture_peer.h"
 #endif
 
 #define IPC_MESSAGE_START GpuMsgStart
 
@@ skipping 178 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(texture_upload_count)
   IPC_STRUCT_TRAITS_MEMBER(total_texture_upload_time)
   IPC_STRUCT_TRAITS_MEMBER(global_total_processing_commands_time)
   IPC_STRUCT_TRAITS_MEMBER(total_processing_commands_time)
 IPC_STRUCT_TRAITS_END()
 
 IPC_ENUM_TRAITS(media::VideoFrame::Format)
 
 IPC_ENUM_TRAITS(media::VideoEncodeAccelerator::Error)
 
+IPC_ENUM_TRAITS(gfx::GpuMemoryBufferType)
+
+IPC_STRUCT_TRAITS_BEGIN(gfx::GpuMemoryBufferHandle)
+  IPC_STRUCT_TRAITS_MEMBER(type)
+  IPC_STRUCT_TRAITS_MEMBER(handle)
+IPC_STRUCT_TRAITS_END()
+
 //------------------------------------------------------------------------------
 // GPU Messages
 // These are messages from the browser to the GPU process.
 
 // Tells the GPU process to initialize itself. The browser explicitly
 // requests this be done so that we are guaranteed that the channel is set
 // up between the browser and GPU process before doing any work that might
 // potentially crash the GPU process. Detection of the child process
 // exiting abruptly is predicated on having the IPC channel set up.
 IPC_MESSAGE_CONTROL0(GpuMsg_Initialize)
@@ skipping 392 matching lines @@
 IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_SignalSyncPointAck,
                     uint32 /* signal_id */)
 
 // Makes this command buffer signal when a query is reached, by sending
 // back a GpuCommandBufferMsg_SignalSyncPointAck message with the same
 // signal_id.
 IPC_MESSAGE_ROUTED2(GpuCommandBufferMsg_SignalQuery,
                     uint32 /* query */,
                     uint32 /* signal_id */)
 
+// Register an existing gpu memory buffer. Returns an id that can be
+// used to identify the gpu memory buffer from a command buffer.

[piman, 2013/10/21 21:57:00]

nit: this doesn't return an id. fix doc?

[reveman, 2013/10/22 16:26:11]

Done. Fixed the description of GpuCommandBufferMsg_RegisterTransferBuffer above
too.

+IPC_MESSAGE_ROUTED5(GpuCommandBufferMsg_RegisterGpuMemoryBuffer,
+                    int32 /* id */,
+                    gfx::GpuMemoryBufferHandle /* gpu_memory_buffer */,
+                    uint32 /* width */,
+                    uint32 /* height */,
+                    uint32 /* internalformat */)
+
+// Destroy a previously created gpu memory buffer.
+IPC_MESSAGE_ROUTED1(GpuCommandBufferMsg_DestroyGpuMemoryBuffer,
+                    int32 /* id */)
+
 //------------------------------------------------------------------------------
 // Accelerated Video Decoder Messages
 // These messages are sent from Renderer process to GPU process.
 
 // Send input buffer for decoding.
 IPC_MESSAGE_ROUTED3(AcceleratedVideoDecoderMsg_Decode,
                     base::SharedMemoryHandle, /* input_buffer_handle */
                     int32, /* bitstream_buffer_id */
                     uint32) /* size */
 
@@ skipping 107 matching lines @@
 
 // Notify the renderer that an output buffer has been filled with encoded data.
 IPC_MESSAGE_ROUTED3(AcceleratedVideoEncoderHostMsg_BitstreamBufferReady,
                     int32 /* bitstream_buffer_id */,
                     uint32 /* payload_size */,
                     bool /* key_frame */)
 
 // Report error condition.
 IPC_MESSAGE_ROUTED1(AcceleratedVideoEncoderHostMsg_NotifyError,
                     media::VideoEncodeAccelerator::Error /* error */)