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