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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 "ui/gfx/font_fallback.h"
#include <string>
#include <vector>
#include "base/optional.h"
#include "base/strings/utf_string_conversions.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "ui/gfx/font.h"
#include "ui/gfx/font_fallback_skia_impl.h"
#include "ui/gfx/font_render_params.h"
#include "ui/gfx/platform_font.h"
namespace gfx {
std::vector<Font> GetFallbackFonts(const Font& font) {
return std::vector<Font>();
}
bool GetFallbackFont(const Font& font,
const std::string& locale,
base::StringPiece16 text,
Font* result) {
TRACE_EVENT0("fonts", "gfx::GetFallbackFont");
if (text.empty())
return false;
sk_sp<SkTypeface> fallback_typeface =
GetSkiaFallbackTypeface(font, locale, text);
if (!fallback_typeface)
return false;
// Fallback needs to keep the exact SkTypeface, as re-matching the font using
// family name and styling information loses access to the underlying platform
// font handles and is not guaranteed to result in the correct typeface, see
// https://crbug.com/1003829
*result = Font(PlatformFont::CreateFromSkTypeface(
std::move(fallback_typeface), font.GetFontSize(), base::nullopt));
return true;
}
} // namespace gfx
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