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      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 
     38 namespace WebCore {
     39 
     40 #if !OS(MACOSX)
     41 unsigned FontPlatformData::hash() const
     42 {
     43     unsigned h = SkTypeface::UniqueID(m_typeface.get());
     44     h ^= 0x01010101 * ((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 
     56 #endif
     57 
     58 #if ENABLE(OPENTYPE_VERTICAL)
     59 PassRefPtr<OpenTypeVerticalData> FontPlatformData::verticalData() const
     60 {
     61     return FontCache::fontCache()->getVerticalData(typeface()->uniqueID(), *this);
     62 }
     63 
     64 PassRefPtr<SharedBuffer> FontPlatformData::openTypeTable(uint32_t table) const
     65 {
     66     RefPtr<SharedBuffer> buffer;
     67 
     68     SkFontTableTag tag = SkEndianSwap32(table);
     69     const size_t tableSize = m_typeface->getTableSize(tag);
     70     if (tableSize) {
     71         Vector<char> tableBuffer(tableSize);
     72         m_typeface->getTableData(tag, 0, tableSize, &tableBuffer[0]);
     73         buffer = SharedBuffer::adoptVector(tableBuffer);
     74     }
     75     return buffer.release();
     76 }
     77 #endif
     78 
     79 } // namespace WebCore
     80