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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome/renderer/gpu_channel_host.h" | |
| 6 | |
| 7 #include "chrome/renderer/command_buffer_proxy.h" | |
| 8 #include "chrome/renderer/gpu_video_service_host.h" | |
| 9 #include "chrome/renderer/render_thread.h" | |
| 10 #include "content/common/child_process.h" | |
| 11 #include "content/common/gpu_messages.h" | |
| 12 | |
| 13 GpuChannelHost::GpuChannelHost() : state_(kUnconnected) { | |
| 14 } | |
| 15 | |
| 16 GpuChannelHost::~GpuChannelHost() { | |
| 17 } | |
| 18 | |
| 19 void GpuChannelHost::Connect( | |
| 20 const IPC::ChannelHandle& channel_handle, | |
| 21 base::ProcessHandle renderer_process_for_gpu) { | |
| 22 // Open a channel to the GPU process. | |
| 23 channel_.reset(new IPC::SyncChannel( | |
| 24 channel_handle, IPC::Channel::MODE_CLIENT, this, | |
| 25 ChildProcess::current()->io_message_loop(), true, | |
| 26 ChildProcess::current()->GetShutDownEvent())); | |
| 27 | |
| 28 // It is safe to send IPC messages before the channel completes the connection | |
| 29 // and receives the hello message from the GPU process. The messages get | |
| 30 // cached. | |
| 31 state_ = kConnected; | |
| 32 | |
| 33 // Notify the GPU process of our process handle. This gives it the ability | |
| 34 // to map renderer handles into the GPU process. | |
| 35 Send(new GpuChannelMsg_Initialize(renderer_process_for_gpu)); | |
| 36 } | |
| 37 | |
| 38 void GpuChannelHost::set_gpu_info(const GPUInfo& gpu_info) { | |
| 39 gpu_info_ = gpu_info; | |
| 40 } | |
| 41 | |
| 42 const GPUInfo& GpuChannelHost::gpu_info() const { | |
| 43 return gpu_info_; | |
| 44 } | |
| 45 | |
| 46 void GpuChannelHost::SetStateLost() { | |
| 47 state_ = kLost; | |
| 48 } | |
| 49 | |
| 50 bool GpuChannelHost::OnMessageReceived(const IPC::Message& message) { | |
| 51 DCHECK(message.routing_id() != MSG_ROUTING_CONTROL); | |
| 52 | |
| 53 // The object to which the message is addressed might have been destroyed. | |
| 54 // This is expected, for example an asynchronous SwapBuffers notification | |
| 55 // to a command buffer proxy that has since been destroyed. This function | |
| 56 // fails silently in that case. | |
| 57 return router_.RouteMessage(message); | |
| 58 } | |
| 59 | |
| 60 void GpuChannelHost::OnChannelConnected(int32 peer_pid) { | |
| 61 // When the channel is connected we create a GpuVideoServiceHost and add it | |
| 62 // as a message filter. | |
| 63 gpu_video_service_host_ = new GpuVideoServiceHost(); | |
| 64 channel_->AddFilter(gpu_video_service_host_.get()); | |
| 65 } | |
| 66 | |
| 67 void GpuChannelHost::OnChannelError() { | |
| 68 state_ = kLost; | |
| 69 | |
| 70 // Channel is invalid and will be reinitialized if this host is requested | |
| 71 // again. | |
| 72 channel_.reset(); | |
| 73 | |
| 74 // Inform all the proxies that an error has occured. This will be reported via | |
| 75 // OpenGL as a lost context. | |
| 76 for (ProxyMap::iterator iter = proxies_.begin(); | |
| 77 iter != proxies_.end(); iter++) { | |
| 78 router_.RemoveRoute(iter->first); | |
| 79 iter->second->OnChannelError(); | |
| 80 } | |
| 81 | |
| 82 // The proxies are reference counted so this will not result in their | |
| 83 // destruction if the client still holds a reference. The proxy will report | |
| 84 // a lost context, indicating to the client that it needs to be recreated. | |
| 85 proxies_.clear(); | |
| 86 } | |
| 87 | |
| 88 bool GpuChannelHost::Send(IPC::Message* message) { | |
| 89 if (channel_.get()) | |
| 90 return channel_->Send(message); | |
| 91 | |
| 92 // Callee takes ownership of message, regardless of whether Send is | |
| 93 // successful. See IPC::Message::Sender. | |
| 94 delete message; | |
| 95 return false; | |
| 96 } | |
| 97 | |
| 98 CommandBufferProxy* GpuChannelHost::CreateViewCommandBuffer( | |
| 99 int render_view_id, | |
| 100 const std::string& allowed_extensions, | |
| 101 const std::vector<int32>& attribs) { | |
| 102 #if defined(ENABLE_GPU) | |
| 103 // An error occurred. Need to get the host again to reinitialize it. | |
| 104 if (!channel_.get()) | |
| 105 return NULL; | |
| 106 | |
| 107 GPUCreateCommandBufferConfig init_params; | |
| 108 init_params.allowed_extensions = allowed_extensions; | |
| 109 init_params.attribs = attribs; | |
| 110 int32 route_id; | |
| 111 if (!RenderThread::current()->Send( | |
| 112 new GpuHostMsg_CreateViewCommandBuffer( | |
| 113 render_view_id, init_params, &route_id))) { | |
| 114 return NULL; | |
| 115 } | |
| 116 | |
| 117 if (route_id == MSG_ROUTING_NONE) | |
| 118 return NULL; | |
| 119 | |
| 120 CommandBufferProxy* command_buffer = new CommandBufferProxy(this, route_id); | |
| 121 router_.AddRoute(route_id, command_buffer); | |
| 122 proxies_[route_id] = command_buffer; | |
| 123 return command_buffer; | |
| 124 #else | |
| 125 return NULL; | |
| 126 #endif | |
| 127 } | |
| 128 | |
| 129 CommandBufferProxy* GpuChannelHost::CreateOffscreenCommandBuffer( | |
| 130 CommandBufferProxy* parent, | |
| 131 const gfx::Size& size, | |
| 132 const std::string& allowed_extensions, | |
| 133 const std::vector<int32>& attribs, | |
| 134 uint32 parent_texture_id) { | |
| 135 #if defined(ENABLE_GPU) | |
| 136 // An error occurred. Need to get the host again to reinitialize it. | |
| 137 if (!channel_.get()) | |
| 138 return NULL; | |
| 139 | |
| 140 GPUCreateCommandBufferConfig init_params; | |
| 141 init_params.allowed_extensions = allowed_extensions; | |
| 142 init_params.attribs = attribs; | |
| 143 int32 parent_route_id = parent ? parent->route_id() : 0; | |
| 144 int32 route_id; | |
| 145 if (!Send(new GpuChannelMsg_CreateOffscreenCommandBuffer(parent_route_id, | |
| 146 size, | |
| 147 init_params, | |
| 148 parent_texture_id, | |
| 149 &route_id))) { | |
| 150 return NULL; | |
| 151 } | |
| 152 | |
| 153 if (route_id == MSG_ROUTING_NONE) | |
| 154 return NULL; | |
| 155 | |
| 156 CommandBufferProxy* command_buffer = new CommandBufferProxy(this, route_id); | |
| 157 router_.AddRoute(route_id, command_buffer); | |
| 158 proxies_[route_id] = command_buffer; | |
| 159 return command_buffer; | |
| 160 #else | |
| 161 return NULL; | |
| 162 #endif | |
| 163 } | |
| 164 | |
| 165 void GpuChannelHost::DestroyCommandBuffer(CommandBufferProxy* command_buffer) { | |
| 166 #if defined(ENABLE_GPU) | |
| 167 Send(new GpuChannelMsg_DestroyCommandBuffer(command_buffer->route_id())); | |
| 168 | |
| 169 // Check the proxy has not already been removed after a channel error. | |
| 170 int route_id = command_buffer->route_id(); | |
| 171 if (proxies_.find(command_buffer->route_id()) != proxies_.end()) { | |
| 172 proxies_.erase(route_id); | |
| 173 router_.RemoveRoute(route_id); | |
| 174 } | |
| 175 | |
| 176 delete command_buffer; | |
| 177 #endif | |
| 178 } | |
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