/* | |
* Copyright (C) 2009 Google Inc. All rights reserved. | |
* | |
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* modification, are permitted provided that the following conditions are | |
* met: | |
* | |
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* 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. | |
* * Neither the name of Google Inc. nor the names of its | |
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* 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 | |
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*/ | |
#include "config.h" | |
#if ENABLE(OPENTYPE_SANITIZER) | |
#include "OpenTypeSanitizer.h" | |
#include "SharedBuffer.h" | |
#include "opentype-sanitiser.h" | |
#include "ots-memory-stream.h" | |
#include <wtf/OwnArrayPtr.h> | |
namespace WebCore { | |
PassRefPtr<SharedBuffer> OpenTypeSanitizer::sanitize() | |
{ | |
if (!m_buffer) | |
return 0; | |
// This is the largest web font size which we'll try to transcode. | |
static const size_t maxWebFontSize = 30 * 1024 * 1024; // 30 MB | |
if (m_buffer->size() > maxWebFontSize) | |
return 0; | |
// A transcoded font is usually smaller than an original font. | |
// However, it can be slightly bigger than the original one due to | |
// name table replacement and/or padding for glyf table. | |
static const size_t padLen = 20 * 1024; // 20 kB | |
OwnArrayPtr<unsigned char> transcodeRawBuffer(new unsigned char[m_buffer->size() + padLen]); | |
ots::MemoryStream output(transcodeRawBuffer.get(), m_buffer->size() + padLen); | |
if (!ots::Process(&output, reinterpret_cast<const uint8_t*>(m_buffer->data()), m_buffer->size())) | |
return 0; | |
const size_t transcodeLen = output.Tell(); | |
return SharedBuffer::create(transcodeRawBuffer.get(), transcodeLen); | |
} | |
} // namespace WebCore | |
#endif // ENABLE(OPENTYPE_SANITIZER) |