Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 69 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/opentype/OpenTypeSanitizer.cpp b/Source/WebCore/platform/graphics/opentype/OpenTypeSanitizer.cpp
new file mode 100644
index 0000000..14aed0d
--- /dev/null
+++ b/Source/WebCore/platform/graphics/opentype/OpenTypeSanitizer.cpp
@@ -0,0 +1,69 @@
+/*
+ * 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.
+    //
+    // With WOFF fonts, however, we'll be decompressing, so the result can be
+    // much larger than the original.
+
+    ots::ExpandingMemoryStream output(m_buffer->size(), maxWebFontSize);
+    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(static_cast<unsigned char*>(output.get()), transcodeLen);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(OPENTYPE_SANITIZER)