third_party/WebKit/Source/platform/fonts/opentype/OpenTypeVerticalData.h

/*
 * Copyright (C) 2012 Koji Ishii <kojiishi@gmail.com>
 *
 * 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.
 */

#ifndef OpenTypeVerticalData_h
#define OpenTypeVerticalData_h

#include "platform/PlatformExport.h"
#include "platform/fonts/Glyph.h"
#include "wtf/Allocator.h"
#include "wtf/HashMap.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/Vector.h"

namespace blink {

class FontPlatformData;
class SimpleFontData;

class PLATFORM_EXPORT OpenTypeVerticalData
    : public RefCounted<OpenTypeVerticalData> {
 public:
  static PassRefPtr<OpenTypeVerticalData> create(
      const FontPlatformData& platformData) {
    return adoptRef(new OpenTypeVerticalData(platformData));
  }

  bool isOpenType() const { return !m_advanceWidths.isEmpty(); }
  bool hasVerticalMetrics() const { return !m_advanceHeights.isEmpty(); }
  float advanceHeight(const SimpleFontData*, Glyph) const;

  bool inFontCache() const { return m_inFontCache; }
  void setInFontCache(bool inFontCache) { m_inFontCache = inFontCache; }

  void getVerticalTranslationsForGlyphs(const SimpleFontData*,
                                        const Glyph*,
                                        size_t,
                                        float* outXYArray) const;

 private:
  explicit OpenTypeVerticalData(const FontPlatformData&);

  void loadMetrics(const FontPlatformData&);
  bool hasVORG() const { return !m_vertOriginY.isEmpty(); }

  HashMap<Glyph, Glyph> m_verticalGlyphMap;
  Vector<uint16_t> m_advanceWidths;
  Vector<uint16_t> m_advanceHeights;
  Vector<int16_t> m_topSideBearings;
  int16_t m_defaultVertOriginY;
  HashMap<Glyph, int16_t> m_vertOriginY;

  bool m_inFontCache;  // for mark & sweep in FontCache::purgeInactiveFontData()
};

}  // namespace blink

#endif  // OpenTypeVerticalData_h