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Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/gen-arabic-table.py')
-rwxr-xr-x | Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/gen-arabic-table.py | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/gen-arabic-table.py b/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/gen-arabic-table.py new file mode 100755 index 00000000000..da5a4fcbf5c --- /dev/null +++ b/Build/source/libs/harfbuzz/harfbuzz-0.9.7/src/gen-arabic-table.py @@ -0,0 +1,197 @@ +#!/usr/bin/python + +import sys +import os.path + +if len (sys.argv) != 3: + print >>sys.stderr, "usage: ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt" + sys.exit (1) + +files = [file (x) for x in sys.argv[1:]] + +headers = [[files[0].readline (), files[0].readline ()]] +headers.append (["UnicodeData.txt does not have a header."]) +while files[0].readline ().find ('##################') < 0: + pass + + +def print_joining_table(f): + + print + print "static const uint8_t joining_table[] =" + print "{" + + min_u = 0x110000 + max_u = 0 + num = 0 + last = -1 + block = '' + for line in f: + + if line[0] == '#': + if line.find (" characters"): + block = line[2:].strip () + continue + + fields = [x.strip () for x in line.split (';')] + if len (fields) == 1: + continue + + u = int (fields[0], 16) + if u == 0x200C or u == 0x200D: + continue + if u < last: + raise Exception ("Input data character not sorted", u) + min_u = min (min_u, u) + max_u = max (max_u, u) + num += 1 + + if block: + print "\n /* %s */\n" % block + block = '' + + if last != -1: + last += 1 + while last < u: + print " JOINING_TYPE_X, /* %04X */" % last + last += 1 + else: + last = u + + if fields[3] in ["ALAPH", "DALATH RISH"]: + value = "JOINING_GROUP_" + fields[3].replace(' ', '_') + else: + value = "JOINING_TYPE_" + fields[2] + print " %s, /* %s */" % (value, '; '.join(fields)) + + print + print "};" + print + print "#define JOINING_TABLE_FIRST 0x%04X" % min_u + print "#define JOINING_TABLE_LAST 0x%04X" % max_u + print + + occupancy = num * 100 / (max_u - min_u + 1) + # Maintain at least 40% occupancy in the table */ + if occupancy < 40: + raise Exception ("Table too sparse, please investigate: ", occupancy) + +def print_shaping_table(f): + + shapes = {} + ligatures = {} + names = {} + for line in f: + + fields = [x.strip () for x in line.split (';')] + if fields[5][0:1] != '<': + continue + + items = fields[5].split (' ') + shape, items = items[0][1:-1], tuple (int (x, 16) for x in items[1:]) + + if not shape in ['initial', 'medial', 'isolated', 'final']: + continue + + c = int (fields[0], 16) + if len (items) != 1: + # We only care about lam-alef ligatures + if len (items) != 2 or items[0] != 0x0644 or items[1] not in [0x0622, 0x0623, 0x0625, 0x0627]: + continue + + # Save ligature + names[c] = fields[1] + if items not in ligatures: + ligatures[items] = {} + ligatures[items][shape] = c + pass + else: + # Save shape + if items[0] not in names: + names[items[0]] = fields[1] + else: + names[items[0]] = os.path.commonprefix ([names[items[0]], fields[1]]).strip () + if items[0] not in shapes: + shapes[items[0]] = {} + shapes[items[0]][shape] = c + + print + print "static const uint16_t shaping_table[][4] =" + print "{" + + keys = shapes.keys () + min_u, max_u = min (keys), max (keys) + for u in range (min_u, max_u + 1): + s = [shapes[u][shape] if u in shapes and shape in shapes[u] else 0 + for shape in ['initial', 'medial', 'final', 'isolated']] + value = ', '.join ("0x%04X" % c for c in s) + print " {%s}, /* U+%04X %s */" % (value, u, names[u] if u in names else "") + + print "};" + print + print "#define SHAPING_TABLE_FIRST 0x%04X" % min_u + print "#define SHAPING_TABLE_LAST 0x%04X" % max_u + print + + ligas = {} + for pair in ligatures.keys (): + for shape in ligatures[pair]: + c = ligatures[pair][shape] + if shape == 'isolated': + liga = (shapes[pair[0]]['initial'], shapes[pair[1]]['final']) + elif shape == 'final': + liga = (shapes[pair[0]]['medial'], shapes[pair[1]]['final']) + else: + raise Exception ("Unexpected shape", shape) + if liga[0] not in ligas: + ligas[liga[0]] = [] + ligas[liga[0]].append ((liga[1], c)) + max_i = max (len (ligas[l]) for l in ligas) + print + print "static const struct ligature_set_t {" + print " uint16_t first;" + print " struct ligature_pairs_t {" + print " uint16_t second;" + print " uint16_t ligature;" + print " } ligatures[%d];" % max_i + print "} ligature_table[] =" + print "{" + keys = ligas.keys () + keys.sort () + for first in keys: + + print " { 0x%04X, {" % (first) + for liga in ligas[first]: + print " { 0x%04X, 0x%04X }, /* %s */" % (liga[0], liga[1], names[liga[1]]) + print " }}," + + print "};" + print + + + +print "/* == Start of generated table == */" +print "/*" +print " * The following table is generated by running:" +print " *" +print " * ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt" +print " *" +print " * on files with these headers:" +print " *" +for h in headers: + for l in h: + print " * %s" % (l.strip()) +print " */" +print +print "#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH" +print "#define HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH" +print + +print_joining_table (files[0]) +print_shaping_table (files[1]) + +print +print "#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH */" +print +print "/* == End of generated table == */" + |