chromium/third_party/blink/renderer/platform/fonts/shaping/harfbuzz_font_cache.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_HARFBUZZ_FONT_CACHE_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_HARFBUZZ_FONT_CACHE_H_

#include "third_party/blink/renderer/platform/fonts/font_metrics.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"

namespace blink {

struct HarfBuzzFontData;

// Though we have FontCache class, which provides the cache mechanism for
// WebKit's font objects, we also need additional caching layer for HarfBuzz to
// reduce the number of hb_font_t objects created. Without it, we would create
// an hb_font_t object for every FontPlatformData object. But insted, we only
// need one for each unique SkTypeface.
// FIXME, crbug.com/609099: We should fix the FontCache to only keep one
// FontPlatformData object independent of size, then consider using this here.

class HarfBuzzFontCache final { … };

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SHAPING_HARFBUZZ_FONT_CACHE_H_