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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// 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 "base/command_line.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "base/win/scoped_comptr.h"
#include "base/win/win_util.h"
#include "base/win/windows_version.h"
#include "content/child/dwrite_font_proxy/dwrite_font_proxy_init_win.h"
#include "content/child/font_warmup_win.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/dwrite_font_platform_win.h"
#include "content/public/common/injection_test_win.h"
#include "content/public/renderer/render_thread.h"
#include "content/renderer/render_thread_impl.h"
#include "sandbox/win/src/sandbox.h"
#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
#include "third_party/WebKit/public/web/win/WebFontRendering.h"
#include "third_party/icu/source/i18n/unicode/timezone.h"
#include "third_party/skia/include/ports/SkTypeface_win.h"
#include "ui/gfx/win/direct_write.h"
#include "ui/gfx/win/dpi.h"
namespace content {
namespace {
// Windows-only skia sandbox support
// These are used for GDI-path rendering.
void SkiaPreCacheFont(const LOGFONT& logfont) {
RenderThread* render_thread = RenderThread::Get();
if (render_thread) {
render_thread->PreCacheFont(logfont);
}
}
// Helper function to cast RenderThread to IPC::Sender so we can Bind()
// it.
IPC::Sender* GetRenderThreadSender() {
return RenderThread::Get();
}
} // namespace
RendererMainPlatformDelegate::RendererMainPlatformDelegate(
const MainFunctionParams& parameters)
: parameters_(parameters),
sandbox_test_module_(NULL) {
}
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(switches::kNoSandbox);
bool use_direct_write = gfx::win::ShouldUseDirectWrite();
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.
scoped_ptr<icu::TimeZone> zone(icu::TimeZone::createDefault());
if (use_direct_write) {
if (ShouldUseDirectWriteFontProxyFieldTrial())
InitializeDWriteFontProxy(base::Bind(&GetRenderThreadSender));
else
WarmupDirectWrite();
} else {
SkTypeface_SetEnsureLOGFONTAccessibleProc(SkiaPreCacheFont);
}
}
blink::WebFontRendering::setUseDirectWrite(use_direct_write);
blink::WebFontRendering::setDeviceScaleFactor(gfx::GetDPIScale());
}
void RendererMainPlatformDelegate::PlatformUninitialize() {
if (ShouldUseDirectWriteFontProxyFieldTrial())
UninitializeDWriteFontProxy();
}
bool RendererMainPlatformDelegate::EnableSandbox() {
sandbox::TargetServices* target_services =
parameters_.sandbox_info->target_services;
if (target_services) {
// Cause advapi32 to load before the sandbox is turned on.
unsigned int dummy_rand;
rand_s(&dummy_rand);
target_services->LowerToken();
return true;
}
return false;
}
} // namespace content
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