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      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/common/gpu/gpu_channel_manager.h"
      6 
      7 #include "base/bind.h"
      8 #include "base/command_line.h"
      9 #include "content/common/gpu/gpu_channel.h"
     10 #include "content/common/gpu/gpu_memory_buffer_factory.h"
     11 #include "content/common/gpu/gpu_memory_manager.h"
     12 #include "content/common/gpu/gpu_messages.h"
     13 #include "content/common/gpu/sync_point_manager.h"
     14 #include "content/common/message_router.h"
     15 #include "gpu/command_buffer/service/feature_info.h"
     16 #include "gpu/command_buffer/service/gpu_switches.h"
     17 #include "gpu/command_buffer/service/mailbox_manager.h"
     18 #include "gpu/command_buffer/service/memory_program_cache.h"
     19 #include "gpu/command_buffer/service/shader_translator_cache.h"
     20 #include "ipc/message_filter.h"
     21 #include "ui/gl/gl_bindings.h"
     22 #include "ui/gl/gl_share_group.h"
     23 
     24 namespace content {
     25 
     26 namespace {
     27 
     28 class GpuChannelManagerMessageFilter : public IPC::MessageFilter {
     29  public:
     30   GpuChannelManagerMessageFilter(
     31       GpuMemoryBufferFactory* gpu_memory_buffer_factory)
     32       : sender_(NULL), gpu_memory_buffer_factory_(gpu_memory_buffer_factory) {}
     33 
     34   virtual void OnFilterAdded(IPC::Sender* sender) OVERRIDE {
     35     DCHECK(!sender_);
     36     sender_ = sender;
     37   }
     38 
     39   virtual void OnFilterRemoved() OVERRIDE {
     40     DCHECK(sender_);
     41     sender_ = NULL;
     42   }
     43 
     44   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE {
     45     DCHECK(sender_);
     46     bool handled = true;
     47     IPC_BEGIN_MESSAGE_MAP(GpuChannelManagerMessageFilter, message)
     48       IPC_MESSAGE_HANDLER(GpuMsg_CreateGpuMemoryBuffer, OnCreateGpuMemoryBuffer)
     49       IPC_MESSAGE_UNHANDLED(handled = false)
     50     IPC_END_MESSAGE_MAP()
     51     return handled;
     52   }
     53 
     54  protected:
     55   virtual ~GpuChannelManagerMessageFilter() {}
     56 
     57   void OnCreateGpuMemoryBuffer(const gfx::GpuMemoryBufferHandle& handle,
     58                                const gfx::Size& size,
     59                                unsigned internalformat,
     60                                unsigned usage) {
     61     TRACE_EVENT2("gpu",
     62                  "GpuChannelManagerMessageFilter::OnCreateGpuMemoryBuffer",
     63                  "primary_id",
     64                  handle.global_id.primary_id,
     65                  "secondary_id",
     66                  handle.global_id.secondary_id);
     67     sender_->Send(new GpuHostMsg_GpuMemoryBufferCreated(
     68         gpu_memory_buffer_factory_->CreateGpuMemoryBuffer(
     69             handle, size, internalformat, usage)));
     70   }
     71 
     72   IPC::Sender* sender_;
     73   GpuMemoryBufferFactory* gpu_memory_buffer_factory_;
     74 };
     75 
     76 }  // namespace
     77 
     78 GpuChannelManager::GpuChannelManager(MessageRouter* router,
     79                                      GpuWatchdog* watchdog,
     80                                      base::MessageLoopProxy* io_message_loop,
     81                                      base::WaitableEvent* shutdown_event,
     82                                      IPC::SyncChannel* channel)
     83     : io_message_loop_(io_message_loop),
     84       shutdown_event_(shutdown_event),
     85       router_(router),
     86       gpu_memory_manager_(
     87           this,
     88           GpuMemoryManager::kDefaultMaxSurfacesWithFrontbufferSoftLimit),
     89       watchdog_(watchdog),
     90       sync_point_manager_(new SyncPointManager),
     91       gpu_memory_buffer_factory_(GpuMemoryBufferFactory::Create()),
     92       channel_(channel),
     93       filter_(new GpuChannelManagerMessageFilter(
     94           gpu_memory_buffer_factory_.get())),
     95       weak_factory_(this) {
     96   DCHECK(router_);
     97   DCHECK(io_message_loop);
     98   DCHECK(shutdown_event);
     99   channel_->AddFilter(filter_.get());
    100 }
    101 
    102 GpuChannelManager::~GpuChannelManager() {
    103   gpu_channels_.clear();
    104   if (default_offscreen_surface_.get()) {
    105     default_offscreen_surface_->Destroy();
    106     default_offscreen_surface_ = NULL;
    107   }
    108 }
    109 
    110 gpu::gles2::ProgramCache* GpuChannelManager::program_cache() {
    111   if (!program_cache_.get() &&
    112       (gfx::g_driver_gl.ext.b_GL_ARB_get_program_binary ||
    113        gfx::g_driver_gl.ext.b_GL_OES_get_program_binary) &&
    114       !CommandLine::ForCurrentProcess()->HasSwitch(
    115           switches::kDisableGpuProgramCache)) {
    116     program_cache_.reset(new gpu::gles2::MemoryProgramCache());
    117   }
    118   return program_cache_.get();
    119 }
    120 
    121 gpu::gles2::ShaderTranslatorCache*
    122 GpuChannelManager::shader_translator_cache() {
    123   if (!shader_translator_cache_.get())
    124     shader_translator_cache_ = new gpu::gles2::ShaderTranslatorCache;
    125   return shader_translator_cache_.get();
    126 }
    127 
    128 void GpuChannelManager::RemoveChannel(int client_id) {
    129   Send(new GpuHostMsg_DestroyChannel(client_id));
    130   gpu_channels_.erase(client_id);
    131 }
    132 
    133 int GpuChannelManager::GenerateRouteID() {
    134   static int last_id = 0;
    135   return ++last_id;
    136 }
    137 
    138 void GpuChannelManager::AddRoute(int32 routing_id, IPC::Listener* listener) {
    139   router_->AddRoute(routing_id, listener);
    140 }
    141 
    142 void GpuChannelManager::RemoveRoute(int32 routing_id) {
    143   router_->RemoveRoute(routing_id);
    144 }
    145 
    146 GpuChannel* GpuChannelManager::LookupChannel(int32 client_id) {
    147   GpuChannelMap::const_iterator iter = gpu_channels_.find(client_id);
    148   if (iter == gpu_channels_.end())
    149     return NULL;
    150   else
    151     return iter->second;
    152 }
    153 
    154 bool GpuChannelManager::OnMessageReceived(const IPC::Message& msg) {
    155   bool handled = true;
    156   IPC_BEGIN_MESSAGE_MAP(GpuChannelManager, msg)
    157     IPC_MESSAGE_HANDLER(GpuMsg_EstablishChannel, OnEstablishChannel)
    158     IPC_MESSAGE_HANDLER(GpuMsg_CloseChannel, OnCloseChannel)
    159     IPC_MESSAGE_HANDLER(GpuMsg_CreateViewCommandBuffer,
    160                         OnCreateViewCommandBuffer)
    161     IPC_MESSAGE_HANDLER(GpuMsg_DestroyGpuMemoryBuffer, OnDestroyGpuMemoryBuffer)
    162     IPC_MESSAGE_HANDLER(GpuMsg_LoadedShader, OnLoadedShader)
    163     IPC_MESSAGE_UNHANDLED(handled = false)
    164   IPC_END_MESSAGE_MAP()
    165   return handled;
    166 }
    167 
    168 bool GpuChannelManager::Send(IPC::Message* msg) { return router_->Send(msg); }
    169 
    170 void GpuChannelManager::OnEstablishChannel(int client_id,
    171                                            bool share_context,
    172                                            bool allow_future_sync_points) {
    173   IPC::ChannelHandle channel_handle;
    174 
    175   gfx::GLShareGroup* share_group = NULL;
    176   gpu::gles2::MailboxManager* mailbox_manager = NULL;
    177   if (share_context) {
    178     if (!share_group_.get()) {
    179       share_group_ = new gfx::GLShareGroup;
    180       DCHECK(!mailbox_manager_.get());
    181       mailbox_manager_ = new gpu::gles2::MailboxManager;
    182     }
    183     share_group = share_group_.get();
    184     mailbox_manager = mailbox_manager_.get();
    185   }
    186 
    187   scoped_ptr<GpuChannel> channel(new GpuChannel(this,
    188                                                 watchdog_,
    189                                                 share_group,
    190                                                 mailbox_manager,
    191                                                 client_id,
    192                                                 false,
    193                                                 allow_future_sync_points));
    194   channel->Init(io_message_loop_.get(), shutdown_event_);
    195   channel_handle.name = channel->GetChannelName();
    196 
    197 #if defined(OS_POSIX)
    198   // On POSIX, pass the renderer-side FD. Also mark it as auto-close so
    199   // that it gets closed after it has been sent.
    200   int renderer_fd = channel->TakeRendererFileDescriptor();
    201   DCHECK_NE(-1, renderer_fd);
    202   channel_handle.socket = base::FileDescriptor(renderer_fd, true);
    203 #endif
    204 
    205   gpu_channels_.set(client_id, channel.Pass());
    206 
    207   Send(new GpuHostMsg_ChannelEstablished(channel_handle));
    208 }
    209 
    210 void GpuChannelManager::OnCloseChannel(
    211     const IPC::ChannelHandle& channel_handle) {
    212   for (GpuChannelMap::iterator iter = gpu_channels_.begin();
    213        iter != gpu_channels_.end(); ++iter) {
    214     if (iter->second->GetChannelName() == channel_handle.name) {
    215       gpu_channels_.erase(iter);
    216       return;
    217     }
    218   }
    219 }
    220 
    221 void GpuChannelManager::OnCreateViewCommandBuffer(
    222     const gfx::GLSurfaceHandle& window,
    223     int32 surface_id,
    224     int32 client_id,
    225     const GPUCreateCommandBufferConfig& init_params,
    226     int32 route_id) {
    227   DCHECK(surface_id);
    228   CreateCommandBufferResult result = CREATE_COMMAND_BUFFER_FAILED;
    229 
    230   GpuChannelMap::const_iterator iter = gpu_channels_.find(client_id);
    231   if (iter != gpu_channels_.end()) {
    232     result = iter->second->CreateViewCommandBuffer(
    233         window, surface_id, init_params, route_id);
    234   }
    235 
    236   Send(new GpuHostMsg_CommandBufferCreated(result));
    237 }
    238 void GpuChannelManager::DestroyGpuMemoryBuffer(
    239     const gfx::GpuMemoryBufferHandle& handle) {
    240   io_message_loop_->PostTask(
    241       FROM_HERE,
    242       base::Bind(&GpuChannelManager::DestroyGpuMemoryBufferOnIO,
    243                  base::Unretained(this),
    244                  handle));
    245 }
    246 
    247 void GpuChannelManager::DestroyGpuMemoryBufferOnIO(
    248     const gfx::GpuMemoryBufferHandle& handle) {
    249   gpu_memory_buffer_factory_->DestroyGpuMemoryBuffer(handle);
    250 }
    251 
    252 void GpuChannelManager::OnDestroyGpuMemoryBuffer(
    253     const gfx::GpuMemoryBufferHandle& handle,
    254     int32 sync_point) {
    255   if (!sync_point) {
    256     DestroyGpuMemoryBuffer(handle);
    257   } else {
    258     sync_point_manager()->AddSyncPointCallback(
    259         sync_point,
    260         base::Bind(&GpuChannelManager::DestroyGpuMemoryBuffer,
    261                    base::Unretained(this),
    262                    handle));
    263   }
    264 }
    265 
    266 void GpuChannelManager::OnLoadedShader(std::string program_proto) {
    267   if (program_cache())
    268     program_cache()->LoadProgram(program_proto);
    269 }
    270 
    271 bool GpuChannelManager::HandleMessagesScheduled() {
    272   for (GpuChannelMap::iterator iter = gpu_channels_.begin();
    273        iter != gpu_channels_.end(); ++iter) {
    274     if (iter->second->handle_messages_scheduled())
    275       return true;
    276   }
    277   return false;
    278 }
    279 
    280 uint64 GpuChannelManager::MessagesProcessed() {
    281   uint64 messages_processed = 0;
    282 
    283   for (GpuChannelMap::iterator iter = gpu_channels_.begin();
    284        iter != gpu_channels_.end(); ++iter) {
    285     messages_processed += iter->second->messages_processed();
    286   }
    287   return messages_processed;
    288 }
    289 
    290 void GpuChannelManager::LoseAllContexts() {
    291   for (GpuChannelMap::iterator iter = gpu_channels_.begin();
    292        iter != gpu_channels_.end(); ++iter) {
    293     iter->second->MarkAllContextsLost();
    294   }
    295   base::MessageLoop::current()->PostTask(
    296       FROM_HERE,
    297       base::Bind(&GpuChannelManager::OnLoseAllContexts,
    298                  weak_factory_.GetWeakPtr()));
    299 }
    300 
    301 void GpuChannelManager::OnLoseAllContexts() {
    302   gpu_channels_.clear();
    303 }
    304 
    305 gfx::GLSurface* GpuChannelManager::GetDefaultOffscreenSurface() {
    306   if (!default_offscreen_surface_.get()) {
    307     default_offscreen_surface_ =
    308         gfx::GLSurface::CreateOffscreenGLSurface(gfx::Size());
    309   }
    310   return default_offscreen_surface_.get();
    311 }
    312 
    313 }  // namespace content
    314