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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/renderer_main_platform_delegate.h"
#include <dwrite.h>
#include <memory>
#include <string>
#include "base/command_line.h"
#include "base/metrics/histogram_functions.h"
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#include "content/child/dwrite_font_proxy/dwrite_font_proxy_init_impl_win.h"
#include "content/child/font_warmup_win.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/public/renderer/render_thread.h"
#include "content/renderer/render_thread_impl.h"
#include "sandbox/policy/features.h"
#include "sandbox/policy/switches.h"
#include "sandbox/policy/win/sandbox_warmup.h"
#include "sandbox/win/src/sandbox.h"
#include "third_party/blink/public/platform/web_runtime_features.h"
#include "third_party/blink/public/web/win/web_font_rendering.h"
#include "third_party/icu/source/i18n/unicode/timezone.h"
#include "third_party/skia/include/ports/SkTypeface_win.h"
#include "ui/display/win/dpi.h"
#include "ui/gfx/win/direct_write.h"
namespace content {
RendererMainPlatformDelegate::RendererMainPlatformDelegate(
const MainFunctionParams& parameters)
: parameters_(parameters) {}
RendererMainPlatformDelegate::~RendererMainPlatformDelegate() {
}
void RendererMainPlatformDelegate::PlatformInitialize() {
const base::CommandLine& command_line = *parameters_->command_line;
// Be mindful of what resources you acquire here. They can be used by
// malicious code if the renderer gets compromised.
bool no_sandbox =
command_line.HasSwitch(sandbox::policy::switches::kNoSandbox);
if (!no_sandbox) {
// ICU DateFormat class (used in base/time_format.cc) needs to get the
// Olson timezone ID by accessing the registry keys under
// HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones.
// After TimeZone::createDefault is called once here, the timezone ID is
// cached and there's no more need to access the registry. If the sandbox
// is disabled, we don't have to make this dummy call.
std::unique_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
}
// Do not initialize DWriteFactory if the feature flag is enabled
// since this will conflict with the experimental font manager.
// Fallback to only DWrite if running in single process mode, since there can
// only be a single font manager and the browser process always has a DWrite
// one.
if (!base::FeatureList::IsEnabled(features::kFontDataServiceAllWebContents) ||
command_line.HasSwitch(switches::kSingleProcess)) {
InitializeDWriteFontProxy();
}
}
void RendererMainPlatformDelegate::PlatformUninitialize() {
UninitializeDWriteFontProxy();
}
bool RendererMainPlatformDelegate::EnableSandbox() {
sandbox::TargetServices* target_services =
parameters_->sandbox_info->target_services;
if (target_services) {
sandbox::policy::WarmupRandomnessInfrastructure();
if (base::FeatureList::IsEnabled(
sandbox::policy::features::kEnableCsrssLockdown)) {
bool hooked = sandbox::policy::HookDwriteGetUserDefaultLCID();
base::UmaHistogramBoolean("Process.Sandbox.DwriteHookStatus", hooked);
}
target_services->LowerToken();
return true;
}
return false;
}
} // namespace content
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