gfx/thebes/gencjkcisvs.py

   1 # This Source Code Form is subject to the terms of the Mozilla Public
   2 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
   3 # You can obtain one at http://mozilla.org/MPL/2.0/.
   4
   5 import os.path
   6 import re
   7 import sys
   8
   9 f = open(sys.argv[1] if len(sys.argv) > 1 else 'StandardizedVariants.txt')
  10
  11 line = f.readline()
  12 m = re.compile('^# (StandardizedVariants(-\d+(\.\d+)*)?\.txt)').search(line)
  13 fileversion = m.group(1)
  14 vsdict = {}
  15 r = re.compile('^([0-9A-F]{4,6}) (FE0[0-9A-F]); CJK COMPATIBILITY IDEOGRAPH-([0-9A-F]{4,6});')
  16 while True:
  17     line = f.readline()
  18     if not line:
  19         break
  20     if not 'CJK COMPATIBILITY IDEOGRAPH-' in line:
  21         continue
  22
  23     m = r.search(line)
  24     unified = int(m.group(1), 16)
  25     vs = int(m.group(2), 16)
  26     compat = int(m.group(3), 16)
  27
  28     if not vs in vsdict:
  29         vsdict[vs] = {}
  30     vsdict[vs][unified] = compat
  31
  32 f.close
  33
  34 offsets = []
  35 length = 10 + 11 * len(vsdict)
  36 for (k, mappings) in sorted(vsdict.items()):
  37     offsets.append(length)
  38     length += 4 + 5 * len(mappings)
  39
  40 f = open(sys.argv[2] if len(sys.argv) > 2 else 'CJKCompatSVS.cpp', 'wb')
  41 f.write("""// Generated by %s. Do not edit.
  42
  43 #include <stdint.h>
  44
  45 #define U16(v) (((v) >> 8) & 0xFF), ((v) & 0xFF)
  46 #define U24(v) (((v) >> 16) & 0xFF), (((v) >> 8) & 0xFF), ((v) & 0xFF)
  47 #define U32(v) (((v) >> 24) & 0xFF), (((v) >> 16) & 0xFF), (((v) >> 8) & 0xFF), ((v) & 0xFF)
  48 #define GLYPH(v) U16(v >= 0x2F800 ? (v) - (0x2F800 - 0xFB00) : (v))
  49
  50 // Fallback mappings for CJK Compatibility Ideographs Standardized Variants
  51 // taken from %s.
  52 // Using OpenType format 14 cmap subtable structure to reuse the lookup code
  53 // for fonts. The glyphID field is used to store the corresponding codepoints
  54 // CJK Compatibility Ideographs. To fit codepoints into the 16-bit glyphID
  55 // field, CJK Compatibility Ideographs Supplement (U+2F800..U+2FA1F) will be
  56 // mapped to 0xFB00..0xFD1F.
  57 extern const uint8_t sCJKCompatSVSTable[] = {
  58 """ % (os.path.basename(sys.argv[0]), fileversion))
  59 f.write('  U16(14), // format\n')
  60 f.write('  U32(%d), // length\n' % length)
  61 f.write('  U32(%d), // numVarSelectorRecords\n' % len(vsdict))
  62 for i, k in enumerate(sorted(vsdict.keys())):
  63     f.write('    U24(0x%04X), U32(0), U32(%d), // varSelectorRecord[%d]\n' % (k, offsets[i], i))
  64 for (k, mappings) in sorted(vsdict.items()):
  65     f.write('  // 0x%04X\n' % k)
  66     f.write('  U32(%d), // numUVSMappings\n' % len(mappings))
  67     for (unified, compat) in sorted(mappings.items()):
  68         f.write('    U24(0x%04X), GLYPH(0x%04X),\n' % (unified, compat))
  69 f.write("""};
  70
  71 #undef U16
  72 #undef U24
  73 #undef U32
  74 #undef GLYPH
  75
  76 static_assert(sizeof sCJKCompatSVSTable == %d, "Table generator has a bug.");
  77 """ % length)