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 * Copyright (c) 2006, 2007, 2008, Google Inc. All rights reserved.
 *
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 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "core/platform/graphics/FontPlatformData.h"

#include "SkEndian.h"
#include "SkTypeface.h"
#include "core/platform/graphics/FontCache.h"

namespace WebCore {

#if (!ENABLE(GDI_FONTS_ON_WINDOWS) || !OS(WIN)) && !OS(MACOSX)
unsigned FontPlatformData::hash() const
{
    unsigned h = SkTypeface::UniqueID(m_typeface.get());
    h ^= 0x01010101 * ((static_cast<int>(m_orientation) << 2) | (static_cast<int>(m_fakeBold) << 1) | static_cast<int>(m_fakeItalic));

    // This memcpy is to avoid a reinterpret_cast that breaks strict-aliasing
    // rules. Memcpy is generally optimized enough so that performance doesn't
    // matter here.
    uint32_t textSizeBytes;
    memcpy(&textSizeBytes, &m_textSize, sizeof(uint32_t));
    h ^= textSizeBytes;

    return h;
}

#endif

#if ENABLE(OPENTYPE_VERTICAL)
PassRefPtr<OpenTypeVerticalData> FontPlatformData::verticalData() const
{
    return fontCache()->getVerticalData(typeface()->uniqueID(), *this);
}

PassRefPtr<SharedBuffer> FontPlatformData::openTypeTable(uint32_t table) const
{
    RefPtr<SharedBuffer> buffer;

    SkFontTableTag tag = SkEndianSwap32(table);
    const size_t tableSize = m_typeface->getTableSize(tag);
    if (tableSize) {
        Vector<char> tableBuffer(tableSize);
        m_typeface->getTableData(tag, 0, tableSize, &tableBuffer[0]);
        buffer = SharedBuffer::adoptVector(tableBuffer);
    }
    return buffer.release();
}
#endif

} // namespace WebCore