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      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 #include "ui/gfx/win/dpi.h"
     29 
     30 #ifdef ENABLE_VTUNE_JIT_INTERFACE
     31 #include "v8/src/third_party/vtune/v8-vtune.h"
     32 #endif
     33 
     34 #include <dwrite.h>
     35 
     36 namespace content {
     37 namespace {
     38 
     39 // Windows-only skia sandbox support
     40 // These are used for GDI-path rendering.
     41 void SkiaPreCacheFont(const LOGFONT& logfont) {
     42   RenderThread* render_thread = RenderThread::Get();
     43   if (render_thread) {
     44     render_thread->PreCacheFont(logfont);
     45   }
     46 }
     47 
     48 void SkiaPreCacheFontCharacters(const LOGFONT& logfont,
     49                                 const wchar_t* text,
     50                                 unsigned int text_length) {
     51   RenderThreadImpl* render_thread_impl = RenderThreadImpl::current();
     52   if (render_thread_impl) {
     53     render_thread_impl->PreCacheFontCharacters(
     54         logfont,
     55         base::string16(text, text_length));
     56   }
     57 }
     58 
     59 void WarmupDirectWrite() {
     60   // The objects used here are intentionally not freed as we want the Skia
     61   // code to use these objects after warmup.
     62   SkTypeface* typeface =
     63       GetPreSandboxWarmupFontMgr()->legacyCreateTypeface("Times New Roman", 0);
     64   DoPreSandboxWarmupForTypeface(typeface);
     65   SetDefaultSkiaFactory(GetPreSandboxWarmupFontMgr());
     66 }
     67 
     68 }  // namespace
     69 
     70 RendererMainPlatformDelegate::RendererMainPlatformDelegate(
     71     const MainFunctionParams& parameters)
     72         : parameters_(parameters),
     73           sandbox_test_module_(NULL) {
     74 }
     75 
     76 RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
     77 }
     78 
     79 void RendererMainPlatformDelegate::PlatformInitialize() {
     80   const CommandLine& command_line = parameters_.command_line;
     81 
     82 #ifdef ENABLE_VTUNE_JIT_INTERFACE
     83   if (command_line.HasSwitch(switches::kEnableVtune))
     84     vTune::InitializeVtuneForV8();
     85 #endif
     86 
     87   // Be mindful of what resources you acquire here. They can be used by
     88   // malicious code if the renderer gets compromised.
     89   bool no_sandbox = command_line.HasSwitch(switches::kNoSandbox);
     90 
     91   bool use_direct_write = ShouldUseDirectWrite();
     92   if (!no_sandbox) {
     93     // ICU DateFormat class (used in base/time_format.cc) needs to get the
     94     // Olson timezone ID by accessing the registry keys under
     95     // HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones.
     96     // After TimeZone::createDefault is called once here, the timezone ID is
     97     // cached and there's no more need to access the registry. If the sandbox
     98     // is disabled, we don't have to make this dummy call.
     99     scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
    100 
    101     if (use_direct_write) {
    102       WarmupDirectWrite();
    103     } else {
    104       SkTypeface_SetEnsureLOGFONTAccessibleProc(SkiaPreCacheFont);
    105       skia::SetSkiaEnsureTypefaceCharactersAccessible(
    106           SkiaPreCacheFontCharacters);
    107     }
    108   }
    109   blink::WebFontRendering::setUseDirectWrite(use_direct_write);
    110   blink::WebFontRendering::setDeviceScaleFactor(gfx::GetDPIScale());
    111   if (use_direct_write) {
    112     blink::WebRuntimeFeatures::enableSubpixelFontScaling(true);
    113   }
    114 }
    115 
    116 void RendererMainPlatformDelegate::PlatformUninitialize() {
    117 }
    118 
    119 bool RendererMainPlatformDelegate::EnableSandbox() {
    120   sandbox::TargetServices* target_services =
    121       parameters_.sandbox_info->target_services;
    122 
    123   if (target_services) {
    124     // Cause advapi32 to load before the sandbox is turned on.
    125     unsigned int dummy_rand;
    126     rand_s(&dummy_rand);
    127     // Warm up language subsystems before the sandbox is turned on.
    128     ::GetUserDefaultLangID();
    129     ::GetUserDefaultLCID();
    130 
    131     target_services->LowerToken();
    132     return true;
    133   }
    134   return false;
    135 }
    136 
    137 }  // namespace content
    138