1 // Copyright (c) 2012 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 "content/renderer/gpu/compositor_output_surface.h" 6 7 #include "base/command_line.h" 8 #include "base/message_loop/message_loop_proxy.h" 9 #include "cc/output/compositor_frame.h" 10 #include "cc/output/compositor_frame_ack.h" 11 #include "cc/output/managed_memory_policy.h" 12 #include "cc/output/output_surface_client.h" 13 #include "content/common/gpu/client/command_buffer_proxy_impl.h" 14 #include "content/common/gpu/client/context_provider_command_buffer.h" 15 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h" 16 #include "content/common/view_messages.h" 17 #include "content/public/common/content_switches.h" 18 #include "content/renderer/gpu/frame_swap_message_queue.h" 19 #include "content/renderer/render_thread_impl.h" 20 #include "gpu/command_buffer/client/context_support.h" 21 #include "gpu/command_buffer/client/gles2_interface.h" 22 #include "ipc/ipc_forwarding_message_filter.h" 23 #include "ipc/ipc_sync_channel.h" 24 25 namespace { 26 // There are several compositor surfaces in a process, but they share the same 27 // compositor thread, so we use a simple int here to track prefer-smoothness. 28 int g_prefer_smoothness_count = 0; 29 } // namespace 30 31 namespace content { 32 33 //------------------------------------------------------------------------------ 34 35 // static 36 IPC::ForwardingMessageFilter* CompositorOutputSurface::CreateFilter( 37 base::TaskRunner* target_task_runner) 38 { 39 uint32 messages_to_filter[] = { 40 ViewMsg_UpdateVSyncParameters::ID, 41 ViewMsg_SwapCompositorFrameAck::ID, 42 ViewMsg_ReclaimCompositorResources::ID, 43 #if defined(OS_ANDROID) 44 ViewMsg_BeginFrame::ID 45 #endif 46 }; 47 48 return new IPC::ForwardingMessageFilter( 49 messages_to_filter, arraysize(messages_to_filter), 50 target_task_runner); 51 } 52 53 CompositorOutputSurface::CompositorOutputSurface( 54 int32 routing_id, 55 uint32 output_surface_id, 56 const scoped_refptr<ContextProviderCommandBuffer>& context_provider, 57 scoped_ptr<cc::SoftwareOutputDevice> software_device, 58 scoped_refptr<FrameSwapMessageQueue> swap_frame_message_queue, 59 bool use_swap_compositor_frame_message) 60 : OutputSurface(context_provider, software_device.Pass()), 61 output_surface_id_(output_surface_id), 62 use_swap_compositor_frame_message_(use_swap_compositor_frame_message), 63 output_surface_filter_( 64 RenderThreadImpl::current()->compositor_output_surface_filter()), 65 frame_swap_message_queue_(swap_frame_message_queue), 66 routing_id_(routing_id), 67 prefers_smoothness_(false), 68 #if defined(OS_WIN) 69 // TODO(epenner): Implement PlatformThread::CurrentHandle() on windows. 70 main_thread_handle_(base::PlatformThreadHandle()), 71 #else 72 main_thread_handle_(base::PlatformThread::CurrentHandle()), 73 #endif 74 layout_test_mode_(RenderThreadImpl::current()->layout_test_mode()), 75 weak_ptrs_(this) { 76 DCHECK(output_surface_filter_.get()); 77 DCHECK(frame_swap_message_queue_.get()); 78 DetachFromThread(); 79 message_sender_ = RenderThreadImpl::current()->sync_message_filter(); 80 DCHECK(message_sender_.get()); 81 if (OutputSurface::software_device()) 82 capabilities_.max_frames_pending = 1; 83 } 84 85 CompositorOutputSurface::~CompositorOutputSurface() { 86 DCHECK(CalledOnValidThread()); 87 SetNeedsBeginFrame(false); 88 if (!HasClient()) 89 return; 90 UpdateSmoothnessTakesPriority(false); 91 if (output_surface_proxy_.get()) 92 output_surface_proxy_->ClearOutputSurface(); 93 output_surface_filter_->RemoveRoute(routing_id_); 94 } 95 96 bool CompositorOutputSurface::BindToClient( 97 cc::OutputSurfaceClient* client) { 98 DCHECK(CalledOnValidThread()); 99 100 if (!cc::OutputSurface::BindToClient(client)) 101 return false; 102 103 output_surface_proxy_ = new CompositorOutputSurfaceProxy(this); 104 output_surface_filter_->AddRoute( 105 routing_id_, 106 base::Bind(&CompositorOutputSurfaceProxy::OnMessageReceived, 107 output_surface_proxy_)); 108 109 if (!context_provider()) { 110 // Without a GPU context, the memory policy otherwise wouldn't be set. 111 client->SetMemoryPolicy(cc::ManagedMemoryPolicy( 112 128 * 1024 * 1024, 113 gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE, 114 base::SharedMemory::GetHandleLimit() / 3)); 115 } 116 117 return true; 118 } 119 120 void CompositorOutputSurface::ShortcutSwapAck( 121 uint32 output_surface_id, 122 scoped_ptr<cc::GLFrameData> gl_frame_data, 123 scoped_ptr<cc::SoftwareFrameData> software_frame_data) { 124 if (!layout_test_previous_frame_ack_) { 125 layout_test_previous_frame_ack_.reset(new cc::CompositorFrameAck); 126 layout_test_previous_frame_ack_->gl_frame_data.reset(new cc::GLFrameData); 127 } 128 129 OnSwapAck(output_surface_id, *layout_test_previous_frame_ack_); 130 131 layout_test_previous_frame_ack_->gl_frame_data = gl_frame_data.Pass(); 132 layout_test_previous_frame_ack_->last_software_frame_id = 133 software_frame_data ? software_frame_data->id : 0; 134 } 135 136 void CompositorOutputSurface::SwapBuffers(cc::CompositorFrame* frame) { 137 if (layout_test_mode_ && use_swap_compositor_frame_message_) { 138 // This code path is here to support layout tests that are currently 139 // doing a readback in the renderer instead of the browser. So they 140 // are using deprecated code paths in the renderer and don't need to 141 // actually swap anything to the browser. We shortcut the swap to the 142 // browser here and just ack directly within the renderer process. 143 // Once crbug.com/311404 is fixed, this can be removed. 144 145 // This would indicate that crbug.com/311404 is being fixed, and this 146 // block needs to be removed. 147 DCHECK(!frame->delegated_frame_data); 148 149 base::Closure closure = 150 base::Bind(&CompositorOutputSurface::ShortcutSwapAck, 151 weak_ptrs_.GetWeakPtr(), 152 output_surface_id_, 153 base::Passed(&frame->gl_frame_data), 154 base::Passed(&frame->software_frame_data)); 155 156 if (context_provider()) { 157 gpu::gles2::GLES2Interface* context = context_provider()->ContextGL(); 158 context->Flush(); 159 uint32 sync_point = context->InsertSyncPointCHROMIUM(); 160 context_provider()->ContextSupport()->SignalSyncPoint(sync_point, 161 closure); 162 } else { 163 base::MessageLoopProxy::current()->PostTask(FROM_HERE, closure); 164 } 165 client_->DidSwapBuffers(); 166 return; 167 } 168 169 if (use_swap_compositor_frame_message_) { 170 { 171 ScopedVector<IPC::Message> messages; 172 std::vector<IPC::Message> messages_to_deliver_with_frame; 173 scoped_ptr<FrameSwapMessageQueue::SendMessageScope> send_message_scope = 174 frame_swap_message_queue_->AcquireSendMessageScope(); 175 frame_swap_message_queue_->DrainMessages(&messages); 176 FrameSwapMessageQueue::TransferMessages(messages, 177 &messages_to_deliver_with_frame); 178 Send(new ViewHostMsg_SwapCompositorFrame(routing_id_, 179 output_surface_id_, 180 *frame, 181 messages_to_deliver_with_frame)); 182 // ~send_message_scope. 183 } 184 client_->DidSwapBuffers(); 185 return; 186 } 187 188 if (frame->gl_frame_data) { 189 ContextProviderCommandBuffer* provider_command_buffer = 190 static_cast<ContextProviderCommandBuffer*>(context_provider()); 191 CommandBufferProxyImpl* command_buffer_proxy = 192 provider_command_buffer->GetCommandBufferProxy(); 193 DCHECK(command_buffer_proxy); 194 command_buffer_proxy->SetLatencyInfo(frame->metadata.latency_info); 195 } 196 197 OutputSurface::SwapBuffers(frame); 198 } 199 200 void CompositorOutputSurface::OnMessageReceived(const IPC::Message& message) { 201 DCHECK(CalledOnValidThread()); 202 if (!HasClient()) 203 return; 204 IPC_BEGIN_MESSAGE_MAP(CompositorOutputSurface, message) 205 IPC_MESSAGE_HANDLER(ViewMsg_UpdateVSyncParameters, 206 OnUpdateVSyncParametersFromBrowser); 207 IPC_MESSAGE_HANDLER(ViewMsg_SwapCompositorFrameAck, OnSwapAck); 208 IPC_MESSAGE_HANDLER(ViewMsg_ReclaimCompositorResources, OnReclaimResources); 209 #if defined(OS_ANDROID) 210 IPC_MESSAGE_HANDLER(ViewMsg_BeginFrame, OnBeginFrame); 211 #endif 212 IPC_END_MESSAGE_MAP() 213 } 214 215 void CompositorOutputSurface::OnUpdateVSyncParametersFromBrowser( 216 base::TimeTicks timebase, 217 base::TimeDelta interval) { 218 DCHECK(CalledOnValidThread()); 219 CommitVSyncParameters(timebase, interval); 220 } 221 222 #if defined(OS_ANDROID) 223 void CompositorOutputSurface::SetNeedsBeginFrame(bool enable) { 224 DCHECK(CalledOnValidThread()); 225 Send(new ViewHostMsg_SetNeedsBeginFrame(routing_id_, enable)); 226 } 227 228 void CompositorOutputSurface::OnBeginFrame(const cc::BeginFrameArgs& args) { 229 DCHECK(CalledOnValidThread()); 230 client_->BeginFrame(args); 231 } 232 #endif // defined(OS_ANDROID) 233 234 void CompositorOutputSurface::OnSwapAck(uint32 output_surface_id, 235 const cc::CompositorFrameAck& ack) { 236 // Ignore message if it's a stale one coming from a different output surface 237 // (e.g. after a lost context). 238 if (output_surface_id != output_surface_id_) 239 return; 240 ReclaimResources(&ack); 241 client_->DidSwapBuffersComplete(); 242 } 243 244 void CompositorOutputSurface::OnReclaimResources( 245 uint32 output_surface_id, 246 const cc::CompositorFrameAck& ack) { 247 // Ignore message if it's a stale one coming from a different output surface 248 // (e.g. after a lost context). 249 if (output_surface_id != output_surface_id_) 250 return; 251 ReclaimResources(&ack); 252 } 253 254 bool CompositorOutputSurface::Send(IPC::Message* message) { 255 return message_sender_->Send(message); 256 } 257 258 namespace { 259 #if defined(OS_ANDROID) 260 void SetThreadPriorityToIdle(base::PlatformThreadHandle handle) { 261 base::PlatformThread::SetThreadPriority( 262 handle, base::kThreadPriority_Background); 263 } 264 void SetThreadPriorityToDefault(base::PlatformThreadHandle handle) { 265 base::PlatformThread::SetThreadPriority( 266 handle, base::kThreadPriority_Normal); 267 } 268 #else 269 void SetThreadPriorityToIdle(base::PlatformThreadHandle handle) {} 270 void SetThreadPriorityToDefault(base::PlatformThreadHandle handle) {} 271 #endif 272 } 273 274 void CompositorOutputSurface::UpdateSmoothnessTakesPriority( 275 bool prefers_smoothness) { 276 #ifndef NDEBUG 277 // If we use different compositor threads, we need to 278 // use an atomic int to track prefer smoothness count. 279 base::PlatformThreadId g_last_thread = base::PlatformThread::CurrentId(); 280 DCHECK_EQ(g_last_thread, base::PlatformThread::CurrentId()); 281 #endif 282 if (prefers_smoothness_ == prefers_smoothness) 283 return; 284 // If this is the first surface to start preferring smoothness, 285 // Throttle the main thread's priority. 286 if (prefers_smoothness_ == false && 287 ++g_prefer_smoothness_count == 1) { 288 SetThreadPriorityToIdle(main_thread_handle_); 289 } 290 // If this is the last surface to stop preferring smoothness, 291 // Reset the main thread's priority to the default. 292 if (prefers_smoothness_ == true && 293 --g_prefer_smoothness_count == 0) { 294 SetThreadPriorityToDefault(main_thread_handle_); 295 } 296 prefers_smoothness_ = prefers_smoothness; 297 } 298 299 } // namespace content 300
