chromium/src/third_party/blink/renderer/platform/fonts/fuchsia/font_cache_fuchsia.cc

/*
 * Copyright (C) 2017 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "third_party/blink/renderer/platform/fonts/font_cache.h"

#include "third_party/blink/renderer/platform/fonts/font_platform_data.h"

namespace blink {

static AtomicString& MutableSystemFontFamily() {
  DEFINE_THREAD_SAFE_STATIC_LOCAL(AtomicString, system_font_family, ());
  return system_font_family;
}

// static
const AtomicString& FontCache::SystemFontFamily() {
  return MutableSystemFontFamily();
}

// static
void FontCache::SetSystemFontFamily(const AtomicString& family_name) {
  DCHECK(!family_name.IsEmpty());
  MutableSystemFontFamily() = family_name;
}

scoped_refptr<SimpleFontData> FontCache::PlatformFallbackFontForCharacter(
    const FontDescription& font_description,
    UChar32 character,
    const SimpleFontData* font_data_to_substitute,
    FontFallbackPriority fallback_priority) {
  sk_sp<SkFontMgr> font_mgr(SkFontMgr::RefDefault());
  std::string family_name = font_description.Family().Family().Utf8();
  Bcp47Vector locales =
      GetBcp47LocaleForRequest(font_description, fallback_priority);
  sk_sp<SkTypeface> typeface(font_mgr->matchFamilyStyleCharacter(
      family_name.c_str(), font_description.SkiaFontStyle(), locales.data(),
      locales.size(), character));
  if (!typeface)
    return nullptr;

  bool synthetic_bold =
      font_description.IsSyntheticBold() && !typeface->isBold();
  bool synthetic_italic =
      font_description.IsSyntheticItalic() && !typeface->isItalic();

  auto font_data = std::make_unique<FontPlatformData>(
      std::move(typeface), std::string(), font_description.EffectiveFontSize(),
      synthetic_bold, synthetic_italic, font_description.Orientation());

  return FontDataFromFontPlatformData(font_data.get(), kDoNotRetain);
}

}  // namespace blink