1/*
2 * Copyright (c) 2006, 2007, 2008, Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "platform/fonts/FontPlatformData.h"
33
34#include "SkEndian.h"
35#include "SkTypeface.h"
36#include "platform/fonts/FontCache.h"
37
38namespace blink {
39
40#if !OS(MACOSX)
41unsigned FontPlatformData::hash() const
42{
43    unsigned h = SkTypeface::UniqueID(m_typeface.get());
44    h ^= 0x01010101 * ((static_cast<int>(m_isHashTableDeletedValue) << 3) | (static_cast<int>(m_orientation) << 2) | (static_cast<int>(m_syntheticBold) << 1) | static_cast<int>(m_syntheticItalic));
45
46    // This memcpy is to avoid a reinterpret_cast that breaks strict-aliasing
47    // rules. Memcpy is generally optimized enough so that performance doesn't
48    // matter here.
49    uint32_t textSizeBytes;
50    memcpy(&textSizeBytes, &m_textSize, sizeof(uint32_t));
51    h ^= textSizeBytes;
52
53    return h;
54}
55
56bool FontPlatformData::fontContainsCharacter(UChar32 character)
57{
58    SkPaint paint;
59    setupPaint(&paint);
60    paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
61
62    uint16_t glyph;
63    paint.textToGlyphs(&character, sizeof(character), &glyph);
64    return glyph;
65}
66
67#endif
68
69#if ENABLE(OPENTYPE_VERTICAL)
70PassRefPtr<OpenTypeVerticalData> FontPlatformData::verticalData() const
71{
72    return FontCache::fontCache()->getVerticalData(typeface()->uniqueID(), *this);
73}
74
75PassRefPtr<SharedBuffer> FontPlatformData::openTypeTable(uint32_t table) const
76{
77    RefPtr<SharedBuffer> buffer;
78
79    SkFontTableTag tag = SkEndianSwap32(table);
80    const size_t tableSize = m_typeface->getTableSize(tag);
81    if (tableSize) {
82        Vector<char> tableBuffer(tableSize);
83        m_typeface->getTableData(tag, 0, tableSize, &tableBuffer[0]);
84        buffer = SharedBuffer::adoptVector(tableBuffer);
85    }
86    return buffer.release();
87}
88#endif
89
90} // namespace blink
91