components/html_viewer/global_state.cc

   1 // Copyright 2015 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 "components/html_viewer/global_state.h"
   6
   7 #include <string>
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "base/i18n/icu_util.h"
  12 #include "base/logging.h"
  13 #include "components/html_viewer/blink_platform_impl.h"
  14 #include "components/html_viewer/media_factory.h"
  15 #include "components/scheduler/renderer/renderer_scheduler.h"
  16 #include "gin/v8_initializer.h"
  17 #include "mojo/application/public/cpp/application_impl.h"
  18 #include "third_party/WebKit/public/web/WebKit.h"
  19 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  20 #include "ui/base/resource/resource_bundle.h"
  21 #include "ui/base/ui_base_paths.h"
  22 #include "ui/mojo/init/ui_init.h"
  23 #include "v8/include/v8.h"
  24
  25 #if defined(OS_LINUX) && !defined(OS_ANDROID)
  26 #include "components/font_service/public/cpp/font_loader.h"
  27 #endif
  28
  29 namespace html_viewer {
  30
  31 namespace {
  32
  33 // Disables support for (unprefixed) Encrypted Media Extensions.
  34 const char kDisableEncryptedMedia[] = "disable-encrypted-media";
  35
  36 // Prevents creation of any output surface.
  37 const char kIsHeadless[] = "is-headless";
  38
  39 // Specifies the flags passed to JS engine.
  40 const char kJavaScriptFlags[] = "js-flags";
  41
  42 size_t kDesiredMaxMemory = 20 * 1024 * 1024;
  43
  44 // Paths resources are loaded from.
  45 const char kResourceResourcesPak[] = "html_viewer.pak";
  46 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
  47 const char kResourceNativesBlob[] = "natives_blob.bin";
  48 const char kResourceSnapshotBlob[] = "snapshot_blob.bin";
  49 #endif
  50
  51 std::set<std::string> GetResourcePaths() {
  52   std::set<std::string> paths;
  53   paths.insert(kResourceResourcesPak);
  54 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
  55   paths.insert(kResourceNativesBlob);
  56   paths.insert(kResourceSnapshotBlob);
  57 #endif
  58   return paths;
  59 }
  60
  61 }  // namespace
  62
  63 GlobalState::GlobalState(mojo::ApplicationImpl* app)
  64     : app_(app),
  65       resource_loader_(app->shell(), GetResourcePaths()),
  66       is_headless_(
  67           base::CommandLine::ForCurrentProcess()->HasSwitch(kIsHeadless)),
  68       did_init_(false),
  69       device_pixel_ratio_(1.f),
  70       discardable_memory_allocator_(kDesiredMaxMemory),
  71       compositor_thread_("compositor thread") {
  72   if (is_headless_)
  73     InitIfNecessary(gfx::Size(1024, 1024), 1.f);
  74 }
  75
  76 GlobalState::~GlobalState() {
  77   if (blink_platform_) {
  78     renderer_scheduler_->Shutdown();
  79     blink::shutdown();
  80   }
  81 }
  82
  83 void GlobalState::InitIfNecessary(const gfx::Size& screen_size_in_pixels,
  84                                   float device_pixel_ratio) {
  85   if (did_init_)
  86     return;
  87
  88   DCHECK_NE(0.f, device_pixel_ratio);
  89
  90   did_init_ = true;
  91   device_pixel_ratio_ = device_pixel_ratio;
  92   screen_size_in_pixels_ = screen_size_in_pixels;
  93
  94   if (!resource_loader_.BlockUntilLoaded()) {
  95     // Assume on error we're being shut down.
  96     app_->Quit();
  97     return;
  98   }
  99
 100 #if defined(OS_LINUX) && !defined(OS_ANDROID)
 101   SkFontConfigInterface::SetGlobal(new font_service::FontLoader(app_));
 102 #endif
 103
 104   ui_init_.reset(
 105       new ui::mojo::UIInit(screen_size_in_pixels, device_pixel_ratio));
 106   base::DiscardableMemoryAllocator::SetInstance(&discardable_memory_allocator_);
 107
 108   renderer_scheduler_ = scheduler::RendererScheduler::Create();
 109   blink_platform_.reset(new BlinkPlatformImpl(app_, renderer_scheduler_.get()));
 110 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
 111   gin::V8Initializer::LoadV8SnapshotFromFD(
 112       resource_loader_.ReleaseFile(kResourceSnapshotBlob).TakePlatformFile(),
 113       0u, 0u);
 114   gin::V8Initializer::LoadV8NativesFromFD(
 115       resource_loader_.ReleaseFile(kResourceNativesBlob).TakePlatformFile(), 0u,
 116       0u);
 117 #endif
 118   blink::initialize(blink_platform_.get());
 119   base::i18n::InitializeICUWithFileDescriptor(
 120       resource_loader_.GetICUFile().TakePlatformFile(),
 121       base::MemoryMappedFile::Region::kWholeFile);
 122
 123   ui::RegisterPathProvider();
 124
 125   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 126
 127   logging::LoggingSettings settings;
 128   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
 129   logging::InitLogging(settings);
 130   // Display process ID, thread ID and timestamp in logs.
 131   logging::SetLogItems(true, true, true, false);
 132
 133   if (command_line->HasSwitch(kDisableEncryptedMedia))
 134     blink::WebRuntimeFeatures::enableEncryptedMedia(false);
 135
 136   if (!is_headless_) {
 137     base::File pak_file = resource_loader_.ReleaseFile(kResourceResourcesPak);
 138     base::File pak_file_2 = pak_file.Duplicate();
 139     ui::ResourceBundle::InitSharedInstanceWithPakFileRegion(
 140         pak_file.Pass(), base::MemoryMappedFile::Region::kWholeFile);
 141     // TODO(sky): why is this always using 100?
 142     ui::ResourceBundle::GetSharedInstance().AddDataPackFromFile(
 143       pak_file_2.Pass(), ui::SCALE_FACTOR_100P);
 144   }
 145
 146   compositor_thread_.Start();
 147
 148   media_factory_.reset(
 149       new MediaFactory(compositor_thread_.task_runner(), app_->shell()));
 150
 151   if (command_line->HasSwitch(kJavaScriptFlags)) {
 152     std::string flags(command_line->GetSwitchValueASCII(kJavaScriptFlags));
 153     v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
 154   }
 155 }
 156
 157 }  // namespace html_viewer