src/content/renderer/gpu/compositor_output_surface.cc

   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 "ipc/ipc_forwarding_message_filter.h"
  20 #include "ipc/ipc_sync_channel.h"
  21
  22 namespace {
  23 // There are several compositor surfaces in a process, but they share the same
  24 // compositor thread, so we use a simple int here to track prefer-smoothness.
  25 int g_prefer_smoothness_count = 0;
  26 } // namespace
  27
  28 namespace content {
  29
  30 //------------------------------------------------------------------------------
  31
  32 // static
  33 IPC::ForwardingMessageFilter* CompositorOutputSurface::CreateFilter(
  34     base::TaskRunner* target_task_runner)
  35 {
  36   uint32 messages_to_filter[] = {
  37     ViewMsg_UpdateVSyncParameters::ID,
  38     ViewMsg_SwapCompositorFrameAck::ID,
  39     ViewMsg_ReclaimCompositorResources::ID,
  40 #if defined(OS_ANDROID)
  41     ViewMsg_BeginFrame::ID
  42 #endif
  43   };
  44
  45   return new IPC::ForwardingMessageFilter(
  46       messages_to_filter, arraysize(messages_to_filter),
  47       target_task_runner);
  48 }
  49
  50 CompositorOutputSurface::CompositorOutputSurface(
  51     int32 routing_id,
  52     uint32 output_surface_id,
  53     const scoped_refptr<ContextProviderCommandBuffer>& context_provider,
  54     scoped_ptr<cc::SoftwareOutputDevice> software_device,
  55     bool use_swap_compositor_frame_message)
  56     : OutputSurface(context_provider, software_device.Pass()),
  57       output_surface_id_(output_surface_id),
  58       use_swap_compositor_frame_message_(use_swap_compositor_frame_message),
  59       output_surface_filter_(
  60           RenderThreadImpl::current()->compositor_output_surface_filter()),
  61       routing_id_(routing_id),
  62       prefers_smoothness_(false),
  63 #if defined(OS_WIN)
  64       // TODO(epenner): Implement PlatformThread::CurrentHandle() on windows.
  65       main_thread_handle_(base::PlatformThreadHandle())
  66 #else
  67       main_thread_handle_(base::PlatformThread::CurrentHandle())
  68 #endif
  69 {
  70   DCHECK(output_surface_filter_.get());
  71   DetachFromThread();
  72   message_sender_ = RenderThreadImpl::current()->sync_message_filter();
  73   DCHECK(message_sender_.get());
  74   if (OutputSurface::software_device())
  75     capabilities_.max_frames_pending = 1;
  76 }
  77
  78 CompositorOutputSurface::~CompositorOutputSurface() {
  79   DCHECK(CalledOnValidThread());
  80   SetNeedsBeginImplFrame(false);
  81   if (!HasClient())
  82     return;
  83   UpdateSmoothnessTakesPriority(false);
  84   if (output_surface_proxy_.get())
  85     output_surface_proxy_->ClearOutputSurface();
  86   output_surface_filter_->RemoveRoute(routing_id_);
  87 }
  88
  89 bool CompositorOutputSurface::BindToClient(
  90     cc::OutputSurfaceClient* client) {
  91   DCHECK(CalledOnValidThread());
  92
  93   if (!cc::OutputSurface::BindToClient(client))
  94     return false;
  95
  96   output_surface_proxy_ = new CompositorOutputSurfaceProxy(this);
  97   output_surface_filter_->AddRoute(
  98       routing_id_,
  99       base::Bind(&CompositorOutputSurfaceProxy::OnMessageReceived,
 100                  output_surface_proxy_));
 101
 102   if (!context_provider()) {
 103     // Without a GPU context, the memory policy otherwise wouldn't be set.
 104     client->SetMemoryPolicy(cc::ManagedMemoryPolicy(
 105         64 * 1024 * 1024,
 106         gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE,
 107         cc::ManagedMemoryPolicy::kDefaultNumResourcesLimit));
 108   }
 109
 110   return true;
 111 }
 112
 113 void CompositorOutputSurface::SwapBuffers(cc::CompositorFrame* frame) {
 114   if (use_swap_compositor_frame_message_) {
 115     Send(new ViewHostMsg_SwapCompositorFrame(routing_id_,
 116                                              output_surface_id_,
 117                                              *frame));
 118     DidSwapBuffers();
 119     return;
 120   }
 121
 122   if (frame->gl_frame_data) {
 123     WebGraphicsContext3DCommandBufferImpl* command_buffer_context =
 124         static_cast<WebGraphicsContext3DCommandBufferImpl*>(
 125             context_provider_->Context3d());
 126     CommandBufferProxyImpl* command_buffer_proxy =
 127         command_buffer_context->GetCommandBufferProxy();
 128     DCHECK(command_buffer_proxy);
 129     context_provider_->Context3d()->shallowFlushCHROMIUM();
 130     command_buffer_proxy->SetLatencyInfo(frame->metadata.latency_info);
 131   }
 132
 133   OutputSurface::SwapBuffers(frame);
 134 }
 135
 136 void CompositorOutputSurface::OnMessageReceived(const IPC::Message& message) {
 137   DCHECK(CalledOnValidThread());
 138   if (!HasClient())
 139     return;
 140   IPC_BEGIN_MESSAGE_MAP(CompositorOutputSurface, message)
 141     IPC_MESSAGE_HANDLER(ViewMsg_UpdateVSyncParameters, OnUpdateVSyncParameters);
 142     IPC_MESSAGE_HANDLER(ViewMsg_SwapCompositorFrameAck, OnSwapAck);
 143     IPC_MESSAGE_HANDLER(ViewMsg_ReclaimCompositorResources, OnReclaimResources);
 144 #if defined(OS_ANDROID)
 145     IPC_MESSAGE_HANDLER(ViewMsg_BeginFrame, OnBeginImplFrame);
 146 #endif
 147   IPC_END_MESSAGE_MAP()
 148 }
 149
 150 void CompositorOutputSurface::OnUpdateVSyncParameters(
 151     base::TimeTicks timebase, base::TimeDelta interval) {
 152   DCHECK(CalledOnValidThread());
 153   OnVSyncParametersChanged(timebase, interval);
 154 }
 155
 156 #if defined(OS_ANDROID)
 157 void CompositorOutputSurface::SetNeedsBeginImplFrame(bool enable) {
 158   DCHECK(CalledOnValidThread());
 159   if (needs_begin_impl_frame_ != enable)
 160     Send(new ViewHostMsg_SetNeedsBeginFrame(routing_id_, enable));
 161   OutputSurface::SetNeedsBeginImplFrame(enable);
 162 }
 163
 164 void CompositorOutputSurface::OnBeginImplFrame(const cc::BeginFrameArgs& args) {
 165   DCHECK(CalledOnValidThread());
 166   BeginImplFrame(args);
 167 }
 168 #endif  // defined(OS_ANDROID)
 169
 170 void CompositorOutputSurface::OnSwapAck(uint32 output_surface_id,
 171                                         const cc::CompositorFrameAck& ack) {
 172   // Ignore message if it's a stale one coming from a different output surface
 173   // (e.g. after a lost context).
 174   if (output_surface_id != output_surface_id_)
 175     return;
 176   ReclaimResources(&ack);
 177   OnSwapBuffersComplete();
 178 }
 179
 180 void CompositorOutputSurface::OnReclaimResources(
 181     uint32 output_surface_id,
 182     const cc::CompositorFrameAck& ack) {
 183   // Ignore message if it's a stale one coming from a different output surface
 184   // (e.g. after a lost context).
 185   if (output_surface_id != output_surface_id_)
 186     return;
 187   ReclaimResources(&ack);
 188 }
 189
 190 bool CompositorOutputSurface::Send(IPC::Message* message) {
 191   return message_sender_->Send(message);
 192 }
 193
 194 namespace {
 195 #if defined(OS_ANDROID)
 196   void SetThreadPriorityToIdle(base::PlatformThreadHandle handle) {
 197     base::PlatformThread::SetThreadPriority(
 198        handle, base::kThreadPriority_Background);
 199   }
 200   void SetThreadPriorityToDefault(base::PlatformThreadHandle handle) {
 201     base::PlatformThread::SetThreadPriority(
 202        handle, base::kThreadPriority_Normal);
 203   }
 204 #else
 205   void SetThreadPriorityToIdle(base::PlatformThreadHandle handle) {}
 206   void SetThreadPriorityToDefault(base::PlatformThreadHandle handle) {}
 207 #endif
 208 }
 209
 210 void CompositorOutputSurface::UpdateSmoothnessTakesPriority(
 211     bool prefers_smoothness) {
 212 #ifndef NDEBUG
 213   // If we use different compositor threads, we need to
 214   // use an atomic int to track prefer smoothness count.
 215   base::PlatformThreadId g_last_thread = base::PlatformThread::CurrentId();
 216   DCHECK_EQ(g_last_thread, base::PlatformThread::CurrentId());
 217 #endif
 218   if (prefers_smoothness_ == prefers_smoothness)
 219     return;
 220   // If this is the first surface to start preferring smoothness,
 221   // Throttle the main thread's priority.
 222   if (prefers_smoothness_ == false &&
 223       ++g_prefer_smoothness_count == 1) {
 224     SetThreadPriorityToIdle(main_thread_handle_);
 225   }
 226   // If this is the last surface to stop preferring smoothness,
 227   // Reset the main thread's priority to the default.
 228   if (prefers_smoothness_ == true &&
 229       --g_prefer_smoothness_count == 0) {
 230     SetThreadPriorityToDefault(main_thread_handle_);
 231   }
 232   prefers_smoothness_ = prefers_smoothness;
 233 }
 234
 235 }  // namespace content