third_party/blink/renderer/platform/fonts/skia/skia_text_metrics.h

// Copyright 2016 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.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SKIA_SKIA_TEXT_METRICS_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_FONTS_SKIA_SKIA_TEXT_METRICS_H_

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

#include <SkFont.h>
#include <hb.h>
#include "third_party/blink/renderer/platform/wtf/vector.h"

class SkPaint;

namespace blink {

class SkiaTextMetrics final {
 public:
  SkiaTextMetrics(const SkPaint* legacy_paint);
  SkiaTextMetrics(const SkFont&);

  void GetGlyphWidthForHarfBuzz(hb_codepoint_t, hb_position_t* width);
  void GetGlyphWidthForHarfBuzz(unsigned count,
                                hb_codepoint_t* first_glyph,
                                unsigned glyph_stride,
                                hb_position_t* first_advance,
                                unsigned advance_stride);
  void GetGlyphExtentsForHarfBuzz(hb_codepoint_t, hb_glyph_extents_t*);

  void GetSkiaBoundsForGlyph(Glyph, SkRect* bounds);
  void GetSkiaBoundsForGlyphs(const Vector<Glyph, 256>&, SkRect*);
  float GetSkiaWidthForGlyph(Glyph);

  static hb_position_t SkiaScalarToHarfBuzzPosition(SkScalar value);

 private:
  const SkFont font_;
};

}  // namespace blink

#endif