text to pixel coordinate for 東方夢終劇. credit to @danmaq for dnh code of this.

ctcwrite.rb

ImageCache = Struct.new(:filename, :data) do
  def load
    return unless File.exists?(self.filename)
    self.data = nil
  end
end
TextCache = Struct.new(:image_id, :x, :y, :width, :height, :kerning, :spacing)

module CtC
  module SJIS
    GAPPOS = [
      0,		62,		108,	115,	122,	137,	145,	146,	156,	182,	208,	291,	354,	378,	401,	425,	458,	473,	491,	523,	553,	576,	577,	606,	700,
      763,	888,	951,	1076,	1139,	1264,	1327,	1452,	1515,	1640,	1703,	1828,	1891,	2016,	2079,	2204,	2267,	2392,	2455,	2580,	2643,	2768,	2831,	2956,	3019,
      3144,	3207,	3332,	3395,	3520,	3571,	3665,	3728,	3853,	3916,	4041,	4104,	4229,	4292,	4417,	4480,	4605,	4668,	4793,	4856,	4981,	5044,	5169,	5232,
      5357,	5420,	5545,	5608,	5733,	5796,	5921,	5984,	6109,	6172,	6297,	6360,	6485,	6548,	6673,	6736,	6861,	6924,	6961,	6996,	7121,	7184,	7309,	7321
    ].freeze
    GAPLEN = [
      33088,	1,		11,		8,		11,		7,		4,		82,		7,		7,		4,		78,		1,		8,		8,		105,	15,		1,		13,		641,	1,		8,		1,		258,	67,
      1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,
      67,		1,		67,		1,		67,		44,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		16451,	1,		67,		1,
      67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		67,		1,		4023,	1,		67,		1,		67,		2
    ].freeze
    X =      1
    WIDTH   = 20
    HEIGHT  = 21
    KERNING = 3
    SPACING = 1
  end
  module ASCII
    module Constants
      SPACE = -1
      CRLF  = -2
    end
    fontSizeData = Struct.new(:x_table, :x_right_cut, :y, :height, :kerning, :spacing, :line_height)
    SIZE = {
      12 => fontSizeData.new(
        [
          7, 25, 44, 66, 88, 111, 134, 152, 171, 190, 212, 235, 253, 275, 293, 319, 340, 358, 380, 401, 423, 445, 466, 487,
          509, 530, 548, 566, 588, 611, 633, 654, 677, 701, 723, 746, 768, 790, 812, 835, 858, 876, 896, 919, 941, 964,
          7, 30, 52, 74, 97, 119, 142, 164, 187, 211, 234,256, 279, 297, 320, 338, 358, 384, 404, 424, 445, 466, 487, 508, 529,
          549, 570, 588, 608, 629, 647, 669, 690, 711, 732, 753, 773, 793, 813, 835, 856, 879, 901, 922, 943, 962, 979, 997,
        ],
        [ 38, 2],
        470, 20, 13, 5, 1
      ),
      16 => fontSizeData.new(
        [
          8, 25, 43, 66, 87, 111, 134, 151, 169, 187, 210, 232, 249, 272, 289, 316, 337, 354, 375, 396, 419, 440, 462, 483,
          504, 525, 542, 559, 582, 604, 627, 648, 671, 696, 718, 741, 764, 786, 808, 832, 854, 871, 891, 914, 936, 959,
          8, 31, 53, 76, 99, 121, 145, 167, 191, 215, 238, 261, 284, 301, 324, 342, 361, 388, 407, 428, 448, 469, 490, 511, 531,
          551, 572, 588, 607, 629, 645, 668, 688, 709, 730, 750, 770, 790, 810, 831, 852, 875, 897, 918, 939, 957, 973, 990
        ],
        [ 44, 7],
        421, 24, 12, 5, 1
      ),
      24 => fontSizeData.new(
        [
          7, 21, 39, 62, 84, 109, 133, 148, 164, 180, 204, 228, 242, 266, 281, 310, 332, 346, 368, 389, 413, 434, 455, 476,
          498, 519, 533, 548, 572, 595, 619, 640, 664, 690, 713, 737, 761, 783, 806, 831, 855, 869, 889, 912, 935, 959,
          7, 31, 54, 77, 102, 124, 149, 172, 196, 223, 247, 271, 294, 310, 333, 349, 368, 398, 416, 436, 456, 477, 497, 519, 538,
          558, 579, 593, 611, 633, 646, 669, 690, 710, 730, 751, 769, 789, 808, 829, 851, 875, 897, 918, 940, 955, 968, 984
        ],
        [ 42, 10 ],
        355, 32, 9, 6, 3
      ),
      32 => fontSizeData.new(
        [
          5, 27, 55, 89, 122, 158, 194, 216, 241, 268, 302, 338, 360, 395, 419, 461, 494, 516, 550, 580, 616, 647, 680, 711, 744, 776, 798, 820, 855, 892, 927, 957,
          5, 43, 77, 112, 148, 182, 214, 252, 287, 309, 340, 374, 407, 443, 477, 514, 546, 583, 618, 652, 688, 723, 759, 797, 833, 869, 902, 926, 
          4, 29, 57, 100, 129, 160, 189, 221, 252, 283, 312, 343, 373, 396, 424, 456, 478, 513, 542, 575, 604, 634, 664, 694, 722, 754, 787, 822, 855, 887, 919, 942, 964, 988
        ],
        [ 31, 62, -8 ],
        230, 40, 15, 6, 3
      ),
      48 => fontSizeData.new(
        [
          8, 36, 72, 117, 162, 211, 260, 289, 322, 355, 402, 449, 479, 526, 556, 614, 658, 686, 730, 772, 819, 862, 904, 947, 989,
          8, 37, 66, 113, 160, 208, 250, 298, 350, 396, 443, 491, 537, 582, 631, 679, 707, 747, 794, 840, 888, 934, 982,
          8, 56, 104, 149, 198, 244, 293, 346, 394, 442, 489, 520, 567, 598, 636, 696, 732, 773, 813, 855, 895, 938, 976,
          8, 49, 78, 114, 158, 185, 232, 272, 313, 354, 394, 431, 471, 509, 551, 595, 642, 687, 729, 771, 803, 829, 861
        ],
        [ -7, -3, 10, 104 ],
        -1, 58, 18, 8, 4
      ),
    }.freeze
  end
end

# x_table, x_cut, spacing, y, height, kerning, spacing
def createTextCache(text, size: 24)
  skip_next = false
  caches = []
  text.size.times do |i|
    char = text[i].ord
    # print '>' unless skip_next
    # print [char].to_s
    next (skip_next = false) if skip_next
    cache = nil
    if char < 128 then
      # ASCII
      size_data = CtC::ASCII::SIZE[size]
      if char <= 32 then
        x, y, width = CtC::ASCII::Constants::SPACE, CtC::ASCII::Constants::SPACE , size_data.spacing
      elsif text[i,2] == '\n' then
        x, y, width = CtC::ASCII::Constants::CRLF, CtC::ASCII::Constants::CRLF, 0
        skip_next = true
      else
        char_i = char - 32
        y_line = 1.upto(char_i).reduce(0) do |x,j| x + (size_data.x_table[j-1]>size_data.x_table[j] ? 1 : 0) end
        x, y = size_data.x_table[char_i - 1], y_line * size_data.height + size_data.y
        if (char_i >= size_data.x_table.size) ||
          (size_data.x_table[char_i] - size_data.x_table[char_i - 1] < 0) then
          width = 1024 - size_data.x_right_cut[y_line] - size_data.x_table[char_i - 1]
        else
          width = size_data.x_table[char_i] - size_data.x_table[char_i - 1]
        end
      end
      height  = size_data.height
      kerning = size_data.kerning
      spacing = size_data.line_height
      cache = TextCache.new(-1, x, y, width, height, kerning, spacing)
    else
      # Shift JIS
      text[i,2]
      pos = [text[i].ord * 256 + text[i+1].ord, 0].max
      CtC::SJIS::GAPPOS.each_index do |j|
        gap = CtC::SJIS::GAPPOS[j]
        pos -= CtC::SJIS::GAPLEN[j] if pos > gap
      end
      pos = [0, pos].max
      y = ((pos / 51) * CtC::SJIS::HEIGHT)
      cache = TextCache.new(
        1 + (y / 1008),
        pos % 51 * CtC::SJIS::WIDTH + CtC::SJIS::X,
        y % 1008,
        CtC::SJIS::WIDTH,
        CtC::SJIS::HEIGHT,
        CtC::SJIS::KERNING,
        CtC::SJIS::SPACING
      )
      skip_next = true
    end
    caches << cache if cache
  end
  caches
end

if __FILE__ == $0 then
  if ARGV.empty? then
    while line = $stdin.gets
      next if line.chomp.empty?
      sjis_line = line.chomp.force_encoding('sjis')
      createTextCache(sjis_line.b).each do |cache|
        p cache
      end
    end
  else
    ARGV.each do |line|
      next if line.chomp.empty?
      sjis_line = line.chomp.force_encoding('sjis')
      p sjis_line
      createTextCache(sjis_line.b).each do |cache|
        p cache
      end
    end
  end
end