components/html_viewer/setup.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/setup.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 "v8/include/v8.h"
  23
  24 #if defined(OS_ANDROID)
  25 #include "components/html_viewer/ui_setup_android.h"
  26 #else
  27 #include "components/html_viewer/ui_setup.h"
  28 #endif
  29
  30 namespace html_viewer {
  31
  32 namespace {
  33
  34 // Disables support for (unprefixed) Encrypted Media Extensions.
  35 const char kDisableEncryptedMedia[] = "disable-encrypted-media";
  36
  37 // Prevents creation of any output surface.
  38 const char kIsHeadless[] = "is-headless";
  39
  40 // Specifies the flags passed to JS engine.
  41 const char kJavaScriptFlags[] = "js-flags";
  42
  43 size_t kDesiredMaxMemory = 20 * 1024 * 1024;
  44
  45 // Paths resources are loaded from.
  46 const char kResourceIcudtl[] = "icudtl.dat";
  47 const char kResourceResourcesPak[] = "html_viewer_resources.pak";
  48 const char kResourceUIPak[] = "ui_test.pak";
  49 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
  50 const char kResourceNativesBlob[] = "natives_blob.bin";
  51 const char kResourceSnapshotBlob[] = "snapshot_blob.bin";
  52 #endif
  53
  54 std::set<std::string> GetResourcePaths() {
  55   std::set<std::string> paths;
  56   paths.insert(kResourceResourcesPak);
  57   paths.insert(kResourceIcudtl);
  58   paths.insert(kResourceUIPak);
  59 #if defined(V8_USE_EXTERNAL_STARTUP_DATA)
  60   paths.insert(kResourceNativesBlob);
  61   paths.insert(kResourceSnapshotBlob);
  62 #endif
  63   return paths;
  64 }
  65
  66 }  // namespace
  67
  68 Setup::Setup(mojo::ApplicationImpl* app)
  69     : app_(app),
  70       resource_loader_(app->shell(), GetResourcePaths()),
  71       is_headless_(
  72           base::CommandLine::ForCurrentProcess()->HasSwitch(kIsHeadless)),
  73       did_init_(false),
  74       device_pixel_ratio_(1.f),
  75       discardable_memory_allocator_(kDesiredMaxMemory),
  76       compositor_thread_("compositor thread") {
  77   if (is_headless_)
  78     InitIfNecessary(gfx::Size(1024, 1024), 1.f);
  79 }
  80
  81 Setup::~Setup() {
  82   if (blink_platform_) {
  83     renderer_scheduler_->Shutdown();
  84     blink::shutdown();
  85   }
  86 }
  87
  88 void Setup::InitIfNecessary(const gfx::Size& screen_size_in_pixels,
  89                             float device_pixel_ratio) {
  90   if (did_init_)
  91     return;
  92
  93   DCHECK_NE(0.f, device_pixel_ratio);
  94
  95   did_init_ = true;
  96   device_pixel_ratio_ = device_pixel_ratio;
  97   screen_size_in_pixels_ = screen_size_in_pixels;
  98
  99   if (!resource_loader_.BlockUntilLoaded()) {
 100     // Assume on error we're being shut down.
 101     app_->Terminate();
 102     return;
 103   }
 104
 105   ui_setup_.reset(new UISetup(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_.ReleaseFile(kResourceIcudtl).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   // TODO(fsamuel): Slimming paint currently crashes mandoline. Investigate.
 134   // See http://crbug.com/499353.
 135   blink::WebRuntimeFeatures::enableSlimmingPaint(false);
 136
 137   if (command_line->HasSwitch(kDisableEncryptedMedia))
 138     blink::WebRuntimeFeatures::enableEncryptedMedia(false);
 139
 140   if (!is_headless_) {
 141     ui::ResourceBundle::InitSharedInstanceWithPakFileRegion(
 142         resource_loader_.ReleaseFile(kResourceResourcesPak),
 143         base::MemoryMappedFile::Region::kWholeFile);
 144     // TODO(sky): why is this always using 100?
 145     ui::ResourceBundle::GetSharedInstance().AddDataPackFromFile(
 146         resource_loader_.ReleaseFile(kResourceUIPak), ui::SCALE_FACTOR_100P);
 147   }
 148
 149   compositor_thread_.Start();
 150
 151   media_factory_.reset(
 152       new MediaFactory(compositor_thread_.message_loop_proxy(), app_->shell()));
 153
 154   if (command_line->HasSwitch(kJavaScriptFlags)) {
 155     std::string flags(command_line->GetSwitchValueASCII(kJavaScriptFlags));
 156     v8::V8::SetFlagsFromString(flags.c_str(), static_cast<int>(flags.size()));
 157   }
 158 }
 159
 160 }  // namespace html_viewer