| /* | |
| * Copyright (C) 2009 Google Inc. All rights reserved. | |
| * | |
| * Redistribution and use in source and binary forms, with or without | |
| * 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. | |
| * * Neither the name of Google Inc. nor the names of its | |
| * 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 | |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| */ | |
| #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) |