content/renderer/renderer_main_platform_delegate_win.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/renderer_main_platform_delegate.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/strings/string16.h"
  11 #include "base/win/scoped_comptr.h"
  12 #include "base/win/win_util.h"
  13 #include "base/win/windows_version.h"
  14 #include "content/common/sandbox_win.h"
  15 #include "content/public/common/content_switches.h"
  16 #include "content/public/common/injection_test_win.h"
  17 #include "content/public/renderer/render_font_warmup_win.h"
  18 #include "content/public/renderer/render_thread.h"
  19 #include "content/renderer/render_thread_impl.h"
  20 #include "sandbox/win/src/sandbox.h"
  21 #include "skia/ext/fontmgr_default_win.h"
  22 #include "skia/ext/vector_platform_device_emf_win.h"
  23 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  24 #include "third_party/WebKit/public/web/win/WebFontRendering.h"
  25 #include "third_party/icu/source/i18n/unicode/timezone.h"
  26 #include "third_party/skia/include/ports/SkFontMgr.h"
  27 #include "third_party/skia/include/ports/SkTypeface_win.h"
  28
  29 #ifdef ENABLE_VTUNE_JIT_INTERFACE
  30 #include "v8/src/third_party/vtune/v8-vtune.h"
  31 #endif
  32
  33 #include <dwrite.h>
  34
  35 namespace content {
  36 namespace {
  37
  38 // Windows-only skia sandbox support
  39 // These are used for GDI-path rendering.
  40 void SkiaPreCacheFont(const LOGFONT& logfont) {
  41   RenderThread* render_thread = RenderThread::Get();
  42   if (render_thread) {
  43     render_thread->PreCacheFont(logfont);
  44   }
  45 }
  46
  47 void SkiaPreCacheFontCharacters(const LOGFONT& logfont,
  48                                 const wchar_t* text,
  49                                 unsigned int text_length) {
  50   RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
  51   if (render_thread_impl) {
  52     render_thread_impl->PreCacheFontCharacters(
  53         logfont,
  54         base::string16(text, text_length));
  55   }
  56 }
  57
  58 void WarmupDirectWrite() {
  59   // The objects used here are intentionally not freed as we want the Skia
  60   // code to use these objects after warmup.
  61   SkTypeface* typeface =
  62       GetPreSandboxWarmupFontMgr()->legacyCreateTypeface("Times New Roman", 0);
  63   DoPreSandboxWarmupForTypeface(typeface);
  64   SetDefaultSkiaFactory(GetPreSandboxWarmupFontMgr());
  65 }
  66
  67 }  // namespace
  68
  69 RendererMainPlatformDelegate::RendererMainPlatformDelegate(
  70     const MainFunctionParams& parameters)
  71         : parameters_(parameters),
  72           sandbox_test_module_(NULL) {
  73 }
  74
  75 RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
  76 }
  77
  78 void RendererMainPlatformDelegate::PlatformInitialize() {
  79   const CommandLine& command_line = parameters_.command_line;
  80
  81 #ifdef ENABLE_VTUNE_JIT_INTERFACE
  82   if (command_line.HasSwitch(switches::kEnableVtune))
  83     vTune::InitializeVtuneForV8();
  84 #endif
  85
  86   // Be mindful of what resources you acquire here. They can be used by
  87   // malicious code if the renderer gets compromised.
  88   bool no_sandbox = command_line.HasSwitch(switches::kNoSandbox);
  89
  90   bool use_direct_write = ShouldUseDirectWrite();
  91   if (!no_sandbox) {
  92     // ICU DateFormat class (used in base/time_format.cc) needs to get the
  93     // Olson timezone ID by accessing the registry keys under
  94     // HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones.
  95     // After TimeZone::createDefault is called once here, the timezone ID is
  96     // cached and there's no more need to access the registry. If the sandbox
  97     // is disabled, we don't have to make this dummy call.
  98     scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
  99
 100     if (use_direct_write) {
 101       WarmupDirectWrite();
 102     } else {
 103       SkTypeface_SetEnsureLOGFONTAccessibleProc(SkiaPreCacheFont);
 104       skia::SetSkiaEnsureTypefaceCharactersAccessible(
 105           SkiaPreCacheFontCharacters);
 106     }
 107   }
 108   blink::WebFontRendering::setUseDirectWrite(use_direct_write);
 109   if (use_direct_write) {
 110     blink::WebRuntimeFeatures::enableSubpixelFontScaling(true);
 111   }
 112 }
 113
 114 void RendererMainPlatformDelegate::PlatformUninitialize() {
 115 }
 116
 117 bool RendererMainPlatformDelegate::EnableSandbox() {
 118   sandbox::TargetServices* target_services =
 119       parameters_.sandbox_info->target_services;
 120
 121   if (target_services) {
 122     // Cause advapi32 to load before the sandbox is turned on.
 123     unsigned int dummy_rand;
 124     rand_s(&dummy_rand);
 125     // Warm up language subsystems before the sandbox is turned on.
 126     ::GetUserDefaultLangID();
 127     ::GetUserDefaultLCID();
 128
 129     target_services->LowerToken();
 130     return true;
 131   }
 132   return false;
 133 }
 134
 135 }  // namespace content