diff options
Diffstat (limited to '')
| -rwxr-xr-x | gfx/harfbuzz/src/gen-arabic-table.py | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/gen-arabic-table.py b/gfx/harfbuzz/src/gen-arabic-table.py new file mode 100755 index 0000000000..8278d7d69c --- /dev/null +++ b/gfx/harfbuzz/src/gen-arabic-table.py @@ -0,0 +1,358 @@ +#!/usr/bin/env python3 + +"""usage: ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt Blocks.txt + +Input files: +* https://unicode.org/Public/UCD/latest/ucd/ArabicShaping.txt +* https://unicode.org/Public/UCD/latest/ucd/UnicodeData.txt +* https://unicode.org/Public/UCD/latest/ucd/Blocks.txt +""" + +import os.path, sys + +if len (sys.argv) != 4: + sys.exit (__doc__) + +files = [open (x, encoding='utf-8') for x in sys.argv[1:]] + +headers = [[files[0].readline (), files[0].readline ()], [files[2].readline (), files[2].readline ()]] +headers.append (["UnicodeData.txt does not have a header."]) +while files[0].readline ().find ('##################') < 0: + pass + +blocks = {} +def read_blocks(f): + global blocks + for line in f: + + j = line.find ('#') + if j >= 0: + line = line[:j] + + fields = [x.strip () for x in line.split (';')] + if len (fields) == 1: + continue + + uu = fields[0].split ('..') + start = int (uu[0], 16) + if len (uu) == 1: + end = start + else: + end = int (uu[1], 16) + + t = fields[1] + + for u in range (start, end + 1): + blocks[u] = t + +def print_joining_table(f): + + values = {} + for line in f: + + if line[0] == '#': + continue + + fields = [x.strip () for x in line.split (';')] + if len (fields) == 1: + continue + + u = int (fields[0], 16) + + if fields[3] in ["ALAPH", "DALATH RISH"]: + value = "JOINING_GROUP_" + fields[3].replace(' ', '_') + else: + value = "JOINING_TYPE_" + fields[2] + values[u] = value + + short_value = {} + for value in sorted (set ([v for v in values.values ()] + ['JOINING_TYPE_X'])): + short = ''.join(x[0] for x in value.split('_')[2:]) + assert short not in short_value.values() + short_value[value] = short + + print () + for value,short in short_value.items(): + print ("#define %s %s" % (short, value)) + + uu = sorted(values.keys()) + num = len(values) + all_blocks = set([blocks[u] for u in uu]) + + last = -100000 + ranges = [] + for u in uu: + if u - last <= 1+16*5: + ranges[-1][-1] = u + else: + ranges.append([u,u]) + last = u + + print () + print ("static const uint8_t joining_table[] =") + print ("{") + last_block = None + offset = 0 + for start,end in ranges: + + print () + print ("#define joining_offset_0x%04xu %d" % (start, offset)) + + for u in range(start, end+1): + + block = blocks.get(u, last_block) + value = values.get(u, "JOINING_TYPE_X") + + if block != last_block or u == start: + if u != start: + print () + if block in all_blocks: + print ("\n /* %s */" % block) + else: + print ("\n /* FILLER */") + last_block = block + if u % 32 != 0: + print () + print (" /* %04X */" % (u//32*32), " " * (u % 32), end="") + + if u % 32 == 0: + print () + print (" /* %04X */ " % u, end="") + print ("%s," % short_value[value], end="") + print () + + offset += end - start + 1 + print () + occupancy = num * 100. / offset + print ("}; /* Table items: %d; occupancy: %d%% */" % (offset, occupancy)) + print () + + page_bits = 12 + print () + print ("static unsigned int") + print ("joining_type (hb_codepoint_t u)") + print ("{") + print (" switch (u >> %d)" % page_bits) + print (" {") + pages = set([u>>page_bits for u in [s for s,e in ranges]+[e for s,e in ranges]]) + for p in sorted(pages): + print (" case 0x%0Xu:" % p) + for (start,end) in ranges: + if p not in [start>>page_bits, end>>page_bits]: continue + offset = "joining_offset_0x%04xu" % start + print (" if (hb_in_range<hb_codepoint_t> (u, 0x%04Xu, 0x%04Xu)) return joining_table[u - 0x%04Xu + %s];" % (start, end, start, offset)) + print (" break;") + print ("") + print (" default:") + print (" break;") + print (" }") + print (" return X;") + print ("}") + print () + for value,short in short_value.items(): + print ("#undef %s" % (short)) + print () + +LIGATURES = ( + 0xF2EE, 0xFC08, 0xFC0E, 0xFC12, 0xFC32, 0xFC3F, 0xFC40, 0xFC41, 0xFC42, + 0xFC44, 0xFC4E, 0xFC5E, 0xFC60, 0xFC61, 0xFC62, 0xFC6A, 0xFC6D, 0xFC6F, + 0xFC70, 0xFC73, 0xFC75, 0xFC86, 0xFC8F, 0xFC91, 0xFC94, 0xFC9C, 0xFC9D, + 0xFC9E, 0xFC9F, 0xFCA1, 0xFCA2, 0xFCA3, 0xFCA4, 0xFCA8, 0xFCAA, 0xFCAC, + 0xFCB0, 0xFCC9, 0xFCCA, 0xFCCB, 0xFCCC, 0xFCCD, 0xFCCE, 0xFCCF, 0xFCD0, + 0xFCD1, 0xFCD2, 0xFCD3, 0xFCD5, 0xFCDA, 0xFCDB, 0xFCDC, 0xFCDD, 0xFD30, + 0xFD88, 0xFEF5, 0xFEF6, 0xFEF7, 0xFEF8, 0xFEF9, 0xFEFA, 0xFEFB, 0xFEFC, + 0xF201, 0xF211, 0xF2EE, +) + +def print_shaping_table(f): + + shapes = {} + ligatures = {} + names = {} + lines = f.readlines() + lines += [ + "F201;PUA ARABIC LIGATURE LELLAH ISOLATED FORM;Lo;0;AL;<isolated> 0644 0644 0647;;;;N;;;;;", + "F211;PUA ARABIC LIGATURE LAM WITH MEEM WITH JEEM INITIAL FORM;Lo;0;AL;<initial> 0644 0645 062C;;;;N;;;;;", + "F2EE;PUA ARABIC LIGATURE SHADDA WITH FATHATAN ISOLATED FORM;Lo;0;AL;<isolated> 0020 064B 0651;;;;N;;;;;", + ] + for line in lines: + + 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:]) + c = int (fields[0], 16) + + if not shape in ['initial', 'medial', 'isolated', 'final']: + continue + + if len (items) != 1: + # Mark ligatures start with space and are in visual order, so we + # remove the space and reverse the items. + if items[0] == 0x0020: + items = items[:0:-1] + shape = None + # We only care about a subset of ligatures + if c not in LIGATURES: + continue + + # Save ligature + names[c] = fields[1] + if items not in ligatures: + ligatures[items] = {} + ligatures[items][shape] = c + 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%04Xu" % 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%04Xu" % min_u) + print ("#define SHAPING_TABLE_LAST 0x%04Xu" % max_u) + print () + + ligas_2 = {} + ligas_3 = {} + ligas_mark_2 = {} + for key in ligatures.keys (): + for shape in ligatures[key]: + c = ligatures[key][shape] + if len(key) == 3: + if shape == 'isolated': + liga = (shapes[key[0]]['initial'], shapes[key[1]]['medial'], shapes[key[2]]['final']) + elif shape == 'final': + liga = (shapes[key[0]]['medial'], shapes[key[1]]['medial'], shapes[key[2]]['final']) + elif shape == 'initial': + liga = (shapes[key[0]]['initial'], shapes[key[1]]['medial'], shapes[key[2]]['medial']) + else: + raise Exception ("Unexpected shape", shape) + if liga[0] not in ligas_3: + ligas_3[liga[0]] = [] + ligas_3[liga[0]].append ((liga[1], liga[2], c)) + elif len(key) == 2: + if shape is None: + liga = key + if liga[0] not in ligas_mark_2: + ligas_mark_2[liga[0]] = [] + ligas_mark_2[liga[0]].append ((liga[1], c)) + continue + elif shape == 'isolated': + liga = (shapes[key[0]]['initial'], shapes[key[1]]['final']) + elif shape == 'final': + liga = (shapes[key[0]]['medial'], shapes[key[1]]['final']) + elif shape == 'initial': + liga = (shapes[key[0]]['initial'], shapes[key[1]]['medial']) + else: + raise Exception ("Unexpected shape", shape) + if liga[0] not in ligas_2: + ligas_2[liga[0]] = [] + ligas_2[liga[0]].append ((liga[1], c)) + else: + raise Exception ("Unexpected number of ligature components", key) + max_i = max (len (ligas_2[l]) for l in ligas_2) + print () + print ("static const struct ligature_set_t {") + print (" uint16_t first;") + print (" struct ligature_pairs_t {") + print (" uint16_t components[1];") + print (" uint16_t ligature;") + print (" } ligatures[%d];" % max_i) + print ("} ligature_table[] =") + print ("{") + for first in sorted (ligas_2.keys ()): + + print (" { 0x%04Xu, {" % (first)) + for liga in ligas_2[first]: + print (" { {0x%04Xu}, 0x%04Xu }, /* %s */" % (liga[0], liga[1], names[liga[1]])) + print (" }},") + + print ("};") + print () + + max_i = max (len (ligas_mark_2[l]) for l in ligas_mark_2) + print () + print ("static const struct ligature_mark_set_t {") + print (" uint16_t first;") + print (" struct ligature_pairs_t {") + print (" uint16_t components[1];") + print (" uint16_t ligature;") + print (" } ligatures[%d];" % max_i) + print ("} ligature_mark_table[] =") + print ("{") + for first in sorted (ligas_mark_2.keys ()): + + print (" { 0x%04Xu, {" % (first)) + for liga in ligas_mark_2[first]: + print (" { {0x%04Xu}, 0x%04Xu }, /* %s */" % (liga[0], liga[1], names[liga[1]])) + print (" }},") + + print ("};") + print () + + max_i = max (len (ligas_3[l]) for l in ligas_3) + print () + print ("static const struct ligature_3_set_t {") + print (" uint16_t first;") + print (" struct ligature_triplets_t {") + print (" uint16_t components[2];") + print (" uint16_t ligature;") + print (" } ligatures[%d];" % max_i) + print ("} ligature_3_table[] =") + print ("{") + for first in sorted (ligas_3.keys ()): + + print (" { 0x%04Xu, {" % (first)) + for liga in ligas_3[first]: + print (" { {0x%04Xu, 0x%04Xu}, 0x%04Xu}, /* %s */" % (liga[0], liga[1], liga[2], names[liga[2]])) + 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 Blocks.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_SHAPER_ARABIC_TABLE_HH") +print ("#define HB_OT_SHAPER_ARABIC_TABLE_HH") +print () + +read_blocks (files[2]) +print_joining_table (files[0]) +print_shaping_table (files[1]) + +print () +print ("#endif /* HB_OT_SHAPER_ARABIC_TABLE_HH */") +print () +print ("/* == End of generated table == */") |