1/*
2 * Copyright (C) 2012 Koji Ishii <kojiishi@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 "Glyph.h"
31#include <wtf/HashMap.h>
32#include <wtf/PassRefPtr.h>
33#include <wtf/RefCounted.h>
34#include <wtf/Vector.h>
35
36namespace WebCore {
37
38class FontPlatformData;
39class GlyphPage;
40class SimpleFontData;
41
42class OpenTypeVerticalData : public RefCounted<OpenTypeVerticalData> {
43public:
44    static PassRefPtr<OpenTypeVerticalData> create(const FontPlatformData& platformData)
45    {
46        return adoptRef(new OpenTypeVerticalData(platformData));
47    }
48
49    bool isOpenType() const { return !m_advanceWidths.isEmpty(); }
50    bool hasVerticalMetrics() const { return !m_advanceHeights.isEmpty(); }
51    float advanceHeight(const SimpleFontData*, Glyph) const;
52    void getVerticalTranslationsForGlyphs(const SimpleFontData*, const Glyph*, size_t, float* outXYArray) const;
53    void substituteWithVerticalGlyphs(const SimpleFontData*, GlyphPage*, unsigned offset, unsigned length) const;
54
55private:
56    explicit OpenTypeVerticalData(const FontPlatformData&);
57
58    void loadMetrics(const FontPlatformData&);
59    void loadVerticalGlyphSubstitutions(const FontPlatformData&);
60    bool hasVORG() const { return !m_vertOriginY.isEmpty(); }
61
62    HashMap<Glyph, Glyph> m_verticalGlyphMap;
63    Vector<uint16_t> m_advanceWidths;
64    Vector<uint16_t> m_advanceHeights;
65    Vector<int16_t> m_topSideBearings;
66    int16_t m_defaultVertOriginY;
67    HashMap<Glyph, int16_t> m_vertOriginY;
68
69    friend class FontCache;
70    bool m_inFontCache; // for mark & sweep in FontCache::purgeInactiveFontData()
71};
72
73} // namespace WebCore
74
75#endif // ENABLE(OPENTYPE_VERTICAL)
76
77#endif // OpenTypeVerticalData_h
78