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// Copyright 2014 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 "ui/gfx/win/direct_write.h"
#include <wrl/client.h>
#include "base/command_line.h"
#include "base/debug/alias.h"
#include "base/metrics/field_trial.h"
#include "base/win/registry.h"
#include "base/win/windows_version.h"
#include "skia/ext/fontmgr_default_win.h"
#include "third_party/skia/include/ports/SkFontMgr.h"
#include "third_party/skia/include/ports/SkTypeface_win.h"
#include "ui/gfx/platform_font_win.h"
#include "ui/gfx/switches.h"
namespace gfx {
namespace win {
void CreateDWriteFactory(IDWriteFactory** factory) {
Microsoft::WRL::ComPtr<IUnknown> factory_unknown;
HRESULT hr =
DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory),
factory_unknown.GetAddressOf());
if (FAILED(hr)) {
base::debug::Alias(&hr);
CHECK(false);
return;
}
factory_unknown.CopyTo(factory);
}
void MaybeInitializeDirectWrite() {
static bool tried_dwrite_initialize = false;
if (tried_dwrite_initialize)
return;
tried_dwrite_initialize = true;
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableDirectWriteForUI)) {
return;
}
Microsoft::WRL::ComPtr<IDWriteFactory> factory;
CreateDWriteFactory(factory.GetAddressOf());
if (!factory)
return;
// The skia call to create a new DirectWrite font manager instance can fail
// if we are unable to get the system font collection from the DirectWrite
// factory. The GetSystemFontCollection method in the IDWriteFactory
// interface fails with E_INVALIDARG on certain Windows 7 gold versions
// (6.1.7600.*). We should just use GDI in these cases.
sk_sp<SkFontMgr> direct_write_font_mgr =
SkFontMgr_New_DirectWrite(factory.Get());
if (!direct_write_font_mgr)
return;
SetDefaultSkiaFactory(std::move(direct_write_font_mgr));
gfx::PlatformFontWin::SetDirectWriteFactory(factory.Get());
}
} // namespace win
} // namespace gfx
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