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/font_warmup_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_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 "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  22 #include "third_party/WebKit/public/web/win/WebFontRendering.h"
  23 #include "third_party/icu/source/i18n/unicode/timezone.h"
  24 #include "third_party/skia/include/ports/SkFontMgr.h"
  25 #include "third_party/skia/include/ports/SkTypeface_win.h"
  26 #include "ui/gfx/hud_font.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 WarmupDirectWrite() {
  45   // The objects used here are intentionally not freed as we want the Skia
  46   // code to use these objects after warmup.
  47   SetDefaultSkiaFactory(GetPreSandboxWarmupFontMgr());
  48
  49   // We need to warm up *some* font for DirectWrite. We also need to pass one
  50   // down for the CC HUD code, so use the same one here. Note that we don't use
  51   // a monospace as would be nice in an attempt to avoid a small startup time
  52   // regression, see http://crbug.com/463613.
  53   skia::RefPtr<SkTypeface> hud_typeface = skia::AdoptRef(
  54       GetPreSandboxWarmupFontMgr()->legacyCreateTypeface("Times New Roman", 0));
  55   DoPreSandboxWarmupForTypeface(hud_typeface.get());
  56   gfx::SetHudTypeface(hud_typeface);
  57 }
  58
  59 }  // namespace
  60
  61 RendererMainPlatformDelegate::RendererMainPlatformDelegate(
  62     const MainFunctionParams& parameters)
  63         : parameters_(parameters),
  64           sandbox_test_module_(NULL) {
  65 }
  66
  67 RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
  68 }
  69
  70 void RendererMainPlatformDelegate::PlatformInitialize() {
  71   const base::CommandLine& command_line = parameters_.command_line;
  72
  73   // Be mindful of what resources you acquire here. They can be used by
  74   // malicious code if the renderer gets compromised.
  75   bool no_sandbox = command_line.HasSwitch(switches::kNoSandbox);
  76
  77   bool use_direct_write = gfx::win::ShouldUseDirectWrite();
  78   if (!no_sandbox) {
  79     // ICU DateFormat class (used in base/time_format.cc) needs to get the
  80     // Olson timezone ID by accessing the registry keys under
  81     // HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones.
  82     // After TimeZone::createDefault is called once here, the timezone ID is
  83     // cached and there's no more need to access the registry. If the sandbox
  84     // is disabled, we don't have to make this dummy call.
  85     scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
  86
  87     if (use_direct_write) {
  88       WarmupDirectWrite();
  89     } else {
  90       SkTypeface_SetEnsureLOGFONTAccessibleProc(SkiaPreCacheFont);
  91     }
  92   }
  93   blink::WebFontRendering::setUseDirectWrite(use_direct_write);
  94   blink::WebFontRendering::setDeviceScaleFactor(gfx::GetDPIScale());
  95 }
  96
  97 void RendererMainPlatformDelegate::PlatformUninitialize() {
  98 }
  99
 100 bool RendererMainPlatformDelegate::EnableSandbox() {
 101   sandbox::TargetServices* target_services =
 102       parameters_.sandbox_info->target_services;
 103
 104   if (target_services) {
 105     // Cause advapi32 to load before the sandbox is turned on.
 106     unsigned int dummy_rand;
 107     rand_s(&dummy_rand);
 108     // Warm up language subsystems before the sandbox is turned on.
 109     ::GetUserDefaultLangID();
 110     ::GetUserDefaultLCID();
 111
 112     target_services->LowerToken();
 113     return true;
 114   }
 115   return false;
 116 }
 117
 118 }  // namespace content