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      1 // Copyright 2014 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 "mojo/examples/pepper_container_app/plugin_module.h"
      6 
      7 #include <string>
      8 
      9 #include "base/files/file_path.h"
     10 #include "base/logging.h"
     11 #include "build/build_config.h"
     12 #include "mojo/examples/pepper_container_app/interface_list.h"
     13 #include "mojo/examples/pepper_container_app/plugin_instance.h"
     14 #include "ppapi/c/pp_errors.h"
     15 #include "ppapi/shared_impl/callback_tracker.h"
     16 
     17 namespace mojo {
     18 namespace examples {
     19 
     20 namespace {
     21 
     22 const void* GetInterface(const char* name) {
     23   const void* interface =
     24       InterfaceList::GetInstance()->GetBrowserInterface(name);
     25 
     26   if (!interface)
     27     LOG(WARNING) << "Interface requested " << name;
     28 
     29   return interface;
     30 }
     31 
     32 }  // namespace
     33 
     34 PluginModule::EntryPoints::EntryPoints() : get_interface(NULL),
     35                                            initialize_module(NULL),
     36                                            shutdown_module(NULL) {}
     37 
     38 PluginModule::PluginModule() : callback_tracker_(new ppapi::CallbackTracker) {
     39   Initialize();
     40 }
     41 
     42 PluginModule::~PluginModule() {
     43   callback_tracker_->AbortAll();
     44 
     45   if (entry_points_.shutdown_module)
     46     entry_points_.shutdown_module();
     47 }
     48 
     49 scoped_ptr<PluginInstance> PluginModule::CreateInstance() {
     50   return make_scoped_ptr(new PluginInstance(this));
     51 }
     52 
     53 const void* PluginModule::GetPluginInterface(const char* name) const {
     54   if (entry_points_.get_interface)
     55     return entry_points_.get_interface(name);
     56   return NULL;
     57 }
     58 
     59 void PluginModule::Initialize() {
     60   // Platform-specific filename.
     61   // TODO(yzshen): Don't hard-code it.
     62 #if defined(OS_WIN)
     63   static const wchar_t plugin_name[] = L"ppapi_example_gles2_spinning_cube.dll";
     64 #elif defined(OS_MACOSX)
     65   static const char plugin_name[] = "ppapi_example_gles2_spinning_cube.plugin";
     66 #elif defined(OS_POSIX)
     67   static const char plugin_name[] = "libppapi_example_gles2_spinning_cube.so";
     68 #endif
     69 
     70   base::FilePath plugin_path(plugin_name);
     71 
     72   base::NativeLibraryLoadError error;
     73   plugin_module_.Reset(base::LoadNativeLibrary(plugin_path, &error));
     74 
     75   if (!plugin_module_.is_valid()) {
     76     LOG(WARNING) << "Cannot load " << plugin_path.AsUTF8Unsafe()
     77                  << ". Error: " << error.ToString();
     78     return;
     79   }
     80 
     81   entry_points_.get_interface =
     82       reinterpret_cast<PP_GetInterface_Func>(
     83           plugin_module_.GetFunctionPointer("PPP_GetInterface"));
     84   if (!entry_points_.get_interface) {
     85     LOG(WARNING) << "No PPP_GetInterface in plugin library";
     86     return;
     87   }
     88 
     89   entry_points_.initialize_module =
     90       reinterpret_cast<PP_InitializeModule_Func>(
     91           plugin_module_.GetFunctionPointer("PPP_InitializeModule"));
     92   if (!entry_points_.initialize_module) {
     93     LOG(WARNING) << "No PPP_InitializeModule in plugin library";
     94     return;
     95   }
     96 
     97   // It's okay for PPP_ShutdownModule to not be defined and |shutdown_module| to
     98   // be NULL.
     99   entry_points_.shutdown_module =
    100       reinterpret_cast<PP_ShutdownModule_Func>(
    101           plugin_module_.GetFunctionPointer("PPP_ShutdownModule"));
    102 
    103   int32_t result = entry_points_.initialize_module(pp_module(),
    104                                                    &GetInterface);
    105   if (result != PP_OK)
    106     LOG(WARNING) << "Initializing module failed with error " << result;
    107 }
    108 
    109 }  // namespace examples
    110 }  // namespace mojo
    111