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// Copyright 2015 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/child/dwrite_font_proxy/dwrite_font_proxy_init_impl_win.h"
#include <dwrite.h>
#include "base/bind.h"
#include "base/callback.h"
#include "base/debug/alias.h"
#include "base/win/iat_patch_function.h"
#include "base/win/windows_version.h"
#include "content/child/dwrite_font_proxy/dwrite_font_proxy_win.h"
#include "content/child/dwrite_font_proxy/font_fallback_win.h"
#include "content/child/font_warmup_win.h"
#include "content/public/common/service_names.mojom.h"
#include "skia/ext/fontmgr_default_win.h"
#include "third_party/blink/public/web/win/web_font_rendering.h"
#include "third_party/skia/include/core/SkFontMgr.h"
#include "third_party/skia/include/ports/SkTypeface_win.h"
namespace mswr = Microsoft::WRL;
namespace content {
namespace {
mswr::ComPtr<DWriteFontCollectionProxy> g_font_collection;
mswr::ComPtr<FontFallback> g_font_fallback;
base::RepeatingCallback<mojom::DWriteFontProxyPtrInfo(void)>*
g_connection_callback_override = nullptr;
// Windows-only DirectWrite support. These warm up the DirectWrite paths
// before sandbox lock down to allow Skia access to the Font Manager service.
void CreateDirectWriteFactory(IDWriteFactory** factory) {
// This shouldn't be necessary, but not having this causes breakage in
// content_browsertests, and possibly other high-stress cases.
PatchServiceManagerCalls();
CHECK(SUCCEEDED(DWriteCreateFactory(DWRITE_FACTORY_TYPE_ISOLATED,
__uuidof(IDWriteFactory),
reinterpret_cast<IUnknown**>(factory))));
}
} // namespace
void InitializeDWriteFontProxy(service_manager::Connector* connector) {
mswr::ComPtr<IDWriteFactory> factory;
CreateDirectWriteFactory(&factory);
if (!g_font_collection) {
mojom::DWriteFontProxyPtrInfo dwrite_font_proxy;
if (g_connection_callback_override) {
dwrite_font_proxy = g_connection_callback_override->Run();
} else if (connector) {
connector->BindInterface(mojom::kBrowserServiceName,
mojo::MakeRequest(&dwrite_font_proxy));
}
// If |connector| is not provided, the connection to the browser will be
// created on demand.
DWriteFontCollectionProxy::Create(&g_font_collection, factory.Get(),
std::move(dwrite_font_proxy));
}
mswr::ComPtr<IDWriteFactory2> factory2;
if (SUCCEEDED(factory.As(&factory2)) && factory2.Get()) {
FontFallback::Create(&g_font_fallback, g_font_collection.Get());
}
sk_sp<SkFontMgr> skia_font_manager = SkFontMgr_New_DirectWrite(
factory.Get(), g_font_collection.Get(), g_font_fallback.Get());
blink::WebFontRendering::SetSkiaFontManager(skia_font_manager);
SetDefaultSkiaFactory(std::move(skia_font_manager));
// When IDWriteFontFallback is not available (prior to Win8.1) Skia will
// still attempt to use DirectWrite to determine fallback fonts (in
// SkFontMgr_DirectWrite::onMatchFamilyStyleCharacter), which will likely
// result in trying to load the system font collection. To avoid that and
// instead fall back on WebKit's fallback logic, we don't use Skia's font
// fallback if IDWriteFontFallback is not available.
// This flag can be removed when Win8.0 and earlier are no longer supported.
bool fallback_available = g_font_fallback.Get() != nullptr;
DCHECK_EQ(fallback_available,
base::win::GetVersion() > base::win::VERSION_WIN8);
blink::WebFontRendering::SetUseSkiaFontFallback(fallback_available);
}
void UninitializeDWriteFontProxy() {
if (g_font_collection)
g_font_collection->Unregister();
}
void SetDWriteFontProxySenderForTesting(
base::RepeatingCallback<mojom::DWriteFontProxyPtrInfo(void)> sender) {
DCHECK(!g_connection_callback_override);
g_connection_callback_override =
new base::RepeatingCallback<mojom::DWriteFontProxyPtrInfo(void)>(
std::move(sender));
}
void ClearDWriteFontProxySenderForTesting() {
delete g_connection_callback_override;
g_connection_callback_override = nullptr;
}
} // namespace content
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