chromium/src/third_party/blink/renderer/platform/fonts/win/font_fallback_win.h

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#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_WIN_FONT_FALLBACK_WIN_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_WIN_FONT_FALLBACK_WIN_H_

#include <unicode/locid.h>
#include <unicode/uscript.h>

#include "mojo/public/cpp/bindings/remote.h"
#include "third_party/blink/public/mojom/dwrite_font_proxy/dwrite_font_proxy.mojom-blink-forward.h"
#include "third_party/blink/renderer/platform/fonts/font_description.h"
#include "third_party/blink/renderer/platform/fonts/font_fallback_priority.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/skia/include/core/SkFontStyle.h"

class SkFontMgr;

namespace blink {

// Return a font family that can render |character| based on what script
// that characters belong to based on hard-coded tables that have been curated
// over time. When scriptChecked is non-zero, the script used to determine the
// family is returned.
PLATFORM_EXPORT const UChar* GetFallbackFamily(
    UChar32 character,
    FontDescription::GenericFamilyType,
    const LayoutLocale* content_locale,
    UScriptCode* script_checked,
    FontFallbackPriority,
    SkFontMgr* font_manager);

// Return a font family that can render |character| based on what script
// that characters belong to by performing an out of process lookup and using
// system fallback API based on IDWriteTextLayout. This method is only to be
// used on pre Windows 8.1, as otherwise IDWriteFontFallback API is available.
PLATFORM_EXPORT bool GetOutOfProcessFallbackFamily(
    UChar32 character,
    FontDescription::GenericFamilyType,
    String bcp47_language_tag,
    FontFallbackPriority,
    const mojo::Remote<mojom::blink::DWriteFontProxy>& font_proxy,
    String* fallback_family,
    SkFontStyle* fallback_style);

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_WIN_FONT_FALLBACK_WIN_H_