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