Initial commit of font compression code into public project.

woff2_header_dump.py

@@ -0,0 +1,38 @@
+# Copyright (c) 2012 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This is a simple utility for dumping out the header of a compressed file, and
+# is suitable for doing spot checks of compressed. files. However, this only
+# implements the "long" form of the table directory.
+
+import struct
+import sys
+
+def dump_woff2_header(header):
+  header_values = struct.unpack('>IIIHHIHHIIIII', header[:44])
+  for i, key in enumerate([
+    'signature',
+    'flavor',
+    'length',
+    'numTables',
+    'reserved',
+    'totalSfntSize',
+    'majorVersion',
+    'minorVersion',
+    'metaOffset',
+    'metaOrigLength',
+    'privOffset',
+    'privLength']):
+    print key, header_values[i]
+  numTables = header_values[3]
+  for i in range(numTables):
+    entry = struct.unpack('>IIIII', header[44+20*i:44+20*(i+1)])
+    print '%08x %d %d %d %d' % entry
+
+def main():
+  header = file(sys.argv[1]).read()
+  dump_woff2_header(header)
+
+main()
+