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      1 /*
      2  * Copyright (C) 2012 Koji Ishii <kojiishi (at) gmail.com>
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1.  Redistributions of source code must retain the above copyright
      8  *     notice, this list of conditions and the following disclaimer.
      9  * 2.  Redistributions in binary form must reproduce the above copyright
     10  *     notice, this list of conditions and the following disclaimer in the
     11  *     documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 
     25 #ifndef OpenTypeVerticalData_h
     26 #define OpenTypeVerticalData_h
     27 
     28 #if ENABLE(OPENTYPE_VERTICAL)
     29 
     30 #include "platform/PlatformExport.h"
     31 #include "platform/fonts/Glyph.h"
     32 #include "wtf/HashMap.h"
     33 #include "wtf/PassRefPtr.h"
     34 #include "wtf/RefCounted.h"
     35 #include "wtf/Vector.h"
     36 
     37 namespace blink {
     38 
     39 class FontPlatformData;
     40 class GlyphPage;
     41 class SimpleFontData;
     42 
     43 class PLATFORM_EXPORT OpenTypeVerticalData : public RefCounted<OpenTypeVerticalData> {
     44 public:
     45     static PassRefPtr<OpenTypeVerticalData> create(const FontPlatformData& platformData)
     46     {
     47         return adoptRef(new OpenTypeVerticalData(platformData));
     48     }
     49 
     50     bool isOpenType() const { return !m_advanceWidths.isEmpty(); }
     51     bool hasVerticalMetrics() const { return !m_advanceHeights.isEmpty(); }
     52     float advanceHeight(const SimpleFontData*, Glyph) const;
     53     void getVerticalTranslationsForGlyphs(const SimpleFontData*, const Glyph*, size_t, float* outXYArray) const;
     54     void substituteWithVerticalGlyphs(const SimpleFontData*, GlyphPage*, unsigned offset, unsigned length) const;
     55 
     56     bool inFontCache() const { return m_inFontCache; }
     57     void setInFontCache(bool inFontCache) { m_inFontCache = inFontCache; }
     58 
     59 private:
     60     explicit OpenTypeVerticalData(const FontPlatformData&);
     61 
     62     void loadMetrics(const FontPlatformData&);
     63     void loadVerticalGlyphSubstitutions(const FontPlatformData&);
     64     bool hasVORG() const { return !m_vertOriginY.isEmpty(); }
     65 
     66     HashMap<Glyph, Glyph> m_verticalGlyphMap;
     67     Vector<uint16_t> m_advanceWidths;
     68     Vector<uint16_t> m_advanceHeights;
     69     Vector<int16_t> m_topSideBearings;
     70     int16_t m_defaultVertOriginY;
     71     HashMap<Glyph, int16_t> m_vertOriginY;
     72 
     73     bool m_inFontCache; // for mark & sweep in FontCache::purgeInactiveFontData()
     74 };
     75 
     76 } // namespace blink
     77 
     78 #endif // ENABLE(OPENTYPE_VERTICAL)
     79 
     80 #endif // OpenTypeVerticalData_h
     81