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-rwxr-xr-xgfx/harfbuzz/src/gen-arabic-table.py358
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diff --git a/gfx/harfbuzz/src/gen-arabic-table.py b/gfx/harfbuzz/src/gen-arabic-table.py
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+++ 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 == */")
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 10:22:39 +0000