Add Harfbuzz to third_party and Skia support for such.

Harfbuzz is an open source library which is a unification of the Qt
and Pango shaping engines. We'll be using it on Chromium Linux to
perform complex text shaping.

Additionally, we add support for Harfbuzz into Skia, guarded by
SKIA_HARFBUZZ.

http://codereview.chromium.org/63035/show


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13214 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 75 insertions, 0 deletions

diff --git a/third_party/harfbuzz/contrib/tables/scripts-parse.py b/third_party/harfbuzz/contrib/tables/scripts-parse.py
new file mode 100644
index 0000000..23bac10
--- /dev/null
+++ b/third_party/harfbuzz/contrib/tables/scripts-parse.py
@@ -0,0 +1,75 @@
+import sys
+from unicode_parse_common import *
+
+# http://www.unicode.org/Public/5.1.0/ucd/Scripts.txt
+
+script_to_harfbuzz = {
+  # This is the list of HB_Script_* at the time of writing
+  'Common': 'HB_Script_Common',
+  'Greek': 'HB_Script_Greek',
+  'Cyrillic': 'HB_Script_Cyrillic',
+  'Armenian': 'HB_Script_Armenian',
+  'Hebrew': 'HB_Script_Hebrew',
+  'Arabic': 'HB_Script_Arabic',
+  'Syriac': 'HB_Script_Syriac',
+  'Thaana': 'HB_Script_Thaana',
+  'Devanagari': 'HB_Script_Devanagari',
+  'Bengali': 'HB_Script_Bengali',
+  'Gurmukhi': 'HB_Script_Gurmukhi',
+  'Gujarati': 'HB_Script_Gujarati',
+  'Oriya': 'HB_Script_Oriya',
+  'Tamil': 'HB_Script_Tamil',
+  'Telugu': 'HB_Script_Telugu',
+  'Kannada': 'HB_Script_Kannada',
+  'Malayalam': 'HB_Script_Malayalam',
+  'Sinhala': 'HB_Script_Sinhala',
+  'Thai': 'HB_Script_Thai',
+  'Lao': 'HB_Script_Lao',
+  'Tibetan': 'HB_Script_Tibetan',
+  'Myanmar': 'HB_Script_Myanmar',
+  'Georgian': 'HB_Script_Georgian',
+  'Hangul': 'HB_Script_Hangul',
+  'Ogham': 'HB_Script_Ogham',
+  'Runic': 'HB_Script_Runic',
+  'Khmer': 'HB_Script_Khmer',
+  'Inherited': 'HB_Script_Inherited',
+}
+
+class ScriptDict(object):
+  def __init__(self, base):
+    self.base = base
+
+  def __getitem__(self, key):
+    r = self.base.get(key, None)
+    if r is None:
+      return 'HB_Script_Common'
+    return r
+
+def main(infile, outfile):
+  ranges = unicode_file_parse(infile,
+                              ScriptDict(script_to_harfbuzz),
+                              'HB_Script_Common')
+  ranges = sort_and_merge(ranges)
+
+  print >>outfile, '// Generated from Unicode script tables\n'
+  print >>outfile, '#ifndef SCRIPT_PROPERTIES_H_'
+  print >>outfile, '#define SCRIPT_PROPERTIES_H_\n'
+  print >>outfile, '#include <stdint.h>'
+  print >>outfile, '#include "harfbuzz-shaper.h"\n'
+  print >>outfile, 'struct script_property {'
+  print >>outfile, '  uint32_t range_start;'
+  print >>outfile, '  uint32_t range_end;'
+  print >>outfile, '  HB_Script script;'
+  print >>outfile, '};\n'
+  print >>outfile, 'static const struct script_property script_properties[] = {'
+  for (start, end, value) in ranges:
+    print >>outfile, '  {0x%x, 0x%x, %s},' % (start, end, value)
+  print >>outfile, '};\n'
+  print >>outfile, 'static const unsigned script_properties_count = %d;\n' % len(ranges)
+  print >>outfile, '#endif  // SCRIPT_PROPERTIES_H_'
+
+if __name__ == '__main__':
+  if len(sys.argv) != 3:
+    print 'Usage: %s <input .txt> <output .h>' % sys.argv[0]
+  else:
+    main(file(sys.argv[1], 'r'), file(sys.argv[2], 'w+'))