1 | /* |
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2 | * makefont create libcaca font data |
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3 | * Copyright (c) 2006 Sam Hocevar <sam@hocevar.net> |
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4 | * All Rights Reserved |
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5 | * |
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6 | * $Id: makefont.c 4149 2009-12-19 14:38:47Z sam $ |
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7 | * |
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8 | * This program is free software. It comes without any warranty, to |
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9 | * the extent permitted by applicable law. You can redistribute it |
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10 | * and/or modify it under the terms of the Do What The Fuck You Want |
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11 | * To Public License, Version 2, as published by Sam Hocevar. See |
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12 | * http://sam.zoy.org/wtfpl/COPYING for more details. |
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13 | * |
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14 | * Usage: |
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15 | * makefont <prefix> <font> <dpi> <bpp> |
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16 | */ |
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17 | |
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18 | #include "config.h" |
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19 | |
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20 | #include <stdio.h> |
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21 | #include <stdlib.h> |
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22 | #include <stdint.h> |
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23 | |
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24 | #if defined HAVE_ARPA_INET_H |
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25 | # include <arpa/inet.h> |
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26 | #elif defined HAVE_NETINET_IN_H |
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27 | # include <netinet/in.h> |
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28 | #endif |
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29 | |
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30 | #include <pango/pango.h> |
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31 | #include <pango/pangoft2.h> |
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32 | |
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33 | #include "caca.h" |
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34 | |
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35 | /* Split our big strings into chunks of 480 characters, because it is |
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36 | * the multiple of 32 directly below 509, which is the maximum allowed |
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37 | * string size in C89. */ |
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38 | #define STRING_CHUNKS 480 |
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39 | |
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40 | /* This list is built so that it includes all of ASCII, Latin-1, CP-437, |
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41 | * and the UTF-8 glyphs necessary for canvas rotation and mirroring. */ |
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42 | static unsigned int const blocklist[] = |
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43 | { |
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44 | 0x0000, 0x0080, /* Basic latin: A, B, C, a, b, c */ |
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45 | 0x0080, 0x0100, /* Latin-1 Supplement: Ä, Ç, å, ß */ |
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46 | 0x0100, 0x0180, /* Latin Extended-A: Ā č Ō œ */ |
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47 | 0x0180, 0x0250, /* Latin Extended-B: Ǝ Ƹ */ |
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48 | 0x0250, 0x02b0, /* IPA Extensions: ɐ ɔ ɘ ʌ ʍ */ |
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49 | 0x0370, 0x0400, /* Greek and Coptic: Λ α β */ |
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50 | 0x0400, 0x0500, /* Cyrillic: И Я */ |
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51 | 0x0530, 0x0590, /* Armenian: Ո */ |
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52 | 0x1401, 0x1677, /* Unified Canadian Aboriginal Syllabics: ᒐ ᗡ */ |
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53 | 0x1d00, 0x1d80, /* Phonetic Extensions: ᴉ ᵷ */ |
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54 | 0x2000, 0x2070, /* General Punctuation: ‘’ “” */ |
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55 | 0x2100, 0x2150, /* Letterlike Symbols: Ⅎ */ |
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56 | 0x2200, 0x2300, /* Mathematical Operators: ∀ √ ∞ ∙ */ |
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57 | 0x2300, 0x2400, /* Miscellaneous Technical: ⌐ ⌂ ⌠ ⌡ */ |
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58 | 0x2500, 0x2580, /* Box Drawing: ═ ║ ╗ ╔ ╩ */ |
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59 | 0x2580, 0x25a0, /* Block Elements: ▛ ▞ ░ ▒ ▓ */ |
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60 | 0x25a0, 0x2600, /* Geometric Shapes: ◆ ○ ● */ |
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61 | 0x2600, 0x2700, /* Miscellaneous Symbols: ♥ ★ ☭ */ |
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62 | 0x3000, 0x3040, /* CJK Symbols and Punctuation: 。「」 */ |
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63 | 0x3040, 0x30a0, /* Hiragana: で す */ |
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64 | 0x30a0, 0x3100, /* Katakana: ロ ル */ |
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65 | 0xff00, 0xfff0, /* Halfwidth and Fullwidth Forms: A, B, C, a, b, c */ |
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66 | 0x10400, 0x10450, /* Deseret: 𐐒 𐐋 */ |
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67 | 0, 0 |
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68 | }; |
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69 | |
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70 | struct glyph |
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71 | { |
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72 | uint32_t unicode; |
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73 | char buf[10]; |
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74 | unsigned int same_as; |
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75 | unsigned int data_offset; |
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76 | unsigned int data_width; |
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77 | unsigned int data_size; |
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78 | }; |
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79 | |
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80 | static void fix_glyph(FT_Bitmap *, uint32_t, unsigned int, unsigned int); |
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81 | static int printf_unicode(struct glyph *); |
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82 | static int printf_hex(char const *, uint8_t *, int); |
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83 | static int printf_u32(char const *, uint32_t); |
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84 | static int printf_u16(char const *, uint16_t); |
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85 | |
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86 | /* Counter for written bytes */ |
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87 | static int written = 0; |
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88 | |
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89 | int main(int argc, char *argv[]) |
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90 | { |
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91 | PangoContext *cx; |
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92 | PangoFontDescription *fd; |
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93 | PangoFontMap *fm; |
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94 | PangoLayout *l; |
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95 | PangoRectangle r; |
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96 | |
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97 | FT_Bitmap img; |
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98 | int stdwidth, fullwidth, height, blocks, glyphs, fullglyphs; |
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99 | unsigned int n, b, i; |
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100 | unsigned int stdsize, fullsize, control_size, data_size, current_offset; |
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101 | uint8_t *glyph_data; |
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102 | struct glyph *gtab; |
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103 | |
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104 | unsigned int bpp, dpi; |
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105 | char const *prefix, *font; |
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106 | |
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107 | if(argc != 5) |
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108 | { |
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109 | fprintf(stderr, "%s: wrong argument count\n", argv[0]); |
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110 | fprintf(stderr, "usage: %s <prefix> <font> <dpi> <bpp>\n", argv[0]); |
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111 | fprintf(stderr, "eg: %s monospace9 \"Monospace 9\" 96 4\n", argv[0]); |
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112 | return -1; |
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113 | } |
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114 | |
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115 | prefix = argv[1]; |
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116 | font = argv[2]; |
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117 | dpi = atoi(argv[3]); |
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118 | bpp = atoi(argv[4]); |
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119 | |
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120 | if(dpi == 0 || (bpp != 1 && bpp != 2 && bpp != 4 && bpp != 8)) |
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121 | { |
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122 | fprintf(stderr, "%s: invalid argument\n", argv[0]); |
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123 | return -1; |
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124 | } |
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125 | |
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126 | fprintf(stderr, "Font \"%s\", %i dpi, %i bpp\n", font, dpi, bpp); |
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127 | |
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128 | /* Initialise Pango */ |
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129 | fm = pango_ft2_font_map_new(); |
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130 | pango_ft2_font_map_set_resolution(PANGO_FT2_FONT_MAP(fm), dpi, dpi); |
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131 | cx = pango_ft2_font_map_create_context(PANGO_FT2_FONT_MAP(fm)); |
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132 | |
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133 | l = pango_layout_new(cx); |
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134 | if(!l) |
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135 | { |
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136 | fprintf(stderr, "%s: unable to initialise pango\n", argv[0]); |
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137 | g_object_unref(cx); |
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138 | return -1; |
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139 | } |
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140 | |
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141 | fd = pango_font_description_from_string(font); |
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142 | pango_layout_set_font_description(l, fd); |
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143 | pango_font_description_free(fd); |
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144 | |
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145 | /* Initialise our FreeType2 bitmap */ |
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146 | img.width = 256; |
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147 | img.pitch = 256; |
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148 | img.rows = 256; |
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149 | img.buffer = malloc(256 * 256); |
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150 | img.num_grays = 256; |
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151 | img.pixel_mode = ft_pixel_mode_grays; |
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152 | |
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153 | /* Test rendering so that we know the glyph width */ |
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154 | pango_layout_set_markup(l, "@", -1); |
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155 | pango_layout_get_extents(l, NULL, &r); |
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156 | stdwidth = PANGO_PIXELS(r.width); |
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157 | fullwidth = stdwidth * 2; |
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158 | height = PANGO_PIXELS(r.height); |
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159 | stdsize = ((stdwidth * height) + (8 / bpp) - 1) / (8 / bpp); |
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160 | fullsize = ((fullwidth * height) + (8 / bpp) - 1) / (8 / bpp); |
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161 | |
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162 | /* Compute blocks and glyphs count */ |
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163 | blocks = 0; |
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164 | glyphs = 0; |
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165 | fullglyphs = 0; |
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166 | for(b = 0; blocklist[b + 1]; b += 2) |
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167 | { |
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168 | blocks++; |
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169 | glyphs += blocklist[b + 1] - blocklist[b]; |
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170 | for(i = blocklist[b]; i < blocklist[b + 1]; i++) |
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171 | if(caca_utf32_is_fullwidth(i)) |
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172 | fullglyphs++; |
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173 | } |
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174 | |
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175 | control_size = 28 + 12 * blocks + 8 * glyphs; |
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176 | data_size = stdsize * (glyphs - fullglyphs) + fullsize * fullglyphs; |
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177 | |
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178 | gtab = malloc(glyphs * sizeof(struct glyph)); |
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179 | glyph_data = malloc(data_size); |
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180 | |
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181 | /* Let's go! */ |
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182 | printf("/* libcaca font file\n"); |
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183 | printf(" * \"%s\": %i dpi, %i bpp, %ix%i/%ix%i glyphs\n", |
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184 | font, dpi, bpp, stdwidth, height, fullwidth, height); |
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185 | printf(" * Automatically generated by tools/makefont.c:\n"); |
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186 | printf(" * tools/makefont %s \"%s\" %i %i\n", prefix, font, dpi, bpp); |
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187 | printf(" */\n"); |
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188 | printf("\n"); |
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189 | |
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190 | printf("static size_t const %s_size = %i;\n", |
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191 | prefix, 4 + control_size + data_size); |
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192 | printf("static uint8_t %s_data[%i] =\n", |
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193 | prefix, 4 + control_size + data_size); |
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194 | printf("{\n"); |
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195 | |
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196 | printf("/* file: */\n"); |
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197 | printf("0xCA,0xCA, /* caca_header */\n"); |
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198 | written += 2; |
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199 | printf("'F','T', /* caca_file_type */\n"); |
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200 | written += 2; |
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201 | printf("\n"); |
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202 | |
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203 | printf("/* font_header: */\n"); |
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204 | printf_u32("%s /* control_size */\n", control_size); |
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205 | printf_u32("%s /* data_size */\n", data_size); |
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206 | printf_u16("%s /* version */\n", 1); |
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207 | printf_u16("%s /* blocks */\n", blocks); |
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208 | printf_u32("%s /* glyphs */\n", glyphs); |
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209 | printf_u16("%s /* bpp */\n", bpp); |
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210 | printf_u16("%s /* std width */\n", stdwidth); |
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211 | printf_u16("%s /* std height */\n", height); |
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212 | printf_u16("%s /* max width */\n", fullwidth); |
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213 | printf_u16("%s /* max height */\n", height); |
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214 | printf_u16("%s /* flags */\n", 1); |
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215 | printf("\n"); |
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216 | |
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217 | printf("/* block_info: */\n"); |
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218 | n = 0; |
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219 | for(b = 0; blocklist[b + 1]; b += 2) |
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220 | { |
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221 | printf_u32("%s", blocklist[b]); |
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222 | printf_u32("%s", blocklist[b + 1]); |
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223 | printf_u32("%s\n", n); |
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224 | n += blocklist[b + 1] - blocklist[b]; |
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225 | } |
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226 | printf("\n"); |
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227 | |
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228 | /* Render all glyphs, so that we can know their offset */ |
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229 | current_offset = n = 0; |
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230 | for(b = 0; blocklist[b + 1]; b += 2) |
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231 | { |
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232 | for(i = blocklist[b]; i < blocklist[b + 1]; i++) |
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233 | { |
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234 | int x, y, bytes, current_width = stdwidth; |
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235 | unsigned int k, current_size = stdsize; |
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236 | |
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237 | if(caca_utf32_is_fullwidth(i)) |
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238 | { |
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239 | current_width = fullwidth; |
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240 | current_size = fullsize; |
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241 | } |
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242 | gtab[n].unicode = i; |
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243 | bytes = caca_utf32_to_utf8(gtab[n].buf, gtab[n].unicode); |
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244 | gtab[n].buf[bytes] = '\0'; |
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245 | |
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246 | /* Render glyph on a bitmap */ |
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247 | pango_layout_set_text(l, gtab[n].buf, -1); |
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248 | memset(img.buffer, 0, img.pitch * height); |
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249 | pango_ft2_render_layout(&img, l, 0, 0); |
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250 | |
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251 | /* Fix glyphs that we know how to handle better */ |
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252 | fix_glyph(&img, gtab[n].unicode, current_width, height); |
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253 | |
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254 | /* Write bitmap as an escaped C string */ |
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255 | memset(glyph_data + current_offset, 0, current_size); |
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256 | k = 0; |
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257 | for(y = 0; y < height; y++) |
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258 | { |
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259 | for(x = 0; x < current_width; x++) |
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260 | { |
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261 | uint8_t pixel = img.buffer[y * img.pitch + x]; |
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262 | |
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263 | pixel >>= (8 - bpp); |
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264 | glyph_data[current_offset + k / 8] |
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265 | |= pixel << (8 - bpp - (k % 8)); |
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266 | k += bpp; |
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267 | } |
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268 | } |
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269 | |
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270 | /* Check whether this is the same glyph as another one. Please |
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271 | * don't bullshit me about sorting, hashing and stuff like that, |
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272 | * our data is small enough for this to work. */ |
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273 | for(k = 0; k < n; k++) |
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274 | { |
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275 | if(gtab[k].data_size != current_size) |
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276 | continue; |
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277 | #if 0 |
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278 | if(!memcmp(glyph_data + gtab[k].data_offset, |
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279 | glyph_data + current_offset, current_size)) |
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280 | break; |
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281 | #endif |
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282 | } |
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283 | |
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284 | gtab[n].data_offset = current_offset; |
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285 | gtab[n].data_width = current_width; |
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286 | gtab[n].data_size = current_size; |
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287 | gtab[n].same_as = k; |
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288 | |
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289 | if(k == n) |
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290 | current_offset += current_size; |
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291 | |
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292 | n++; |
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293 | } |
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294 | } |
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295 | |
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296 | printf("/* glyph_info: */\n"); |
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297 | n = 0; |
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298 | for(b = 0; blocklist[b + 1]; b += 2) |
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299 | { |
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300 | for(i = blocklist[b]; i < blocklist[b + 1]; i++) |
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301 | { |
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302 | printf_u16("%s", gtab[n].data_width); |
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303 | printf_u16("%s", height); |
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304 | printf_u32("%s\n", gtab[gtab[n].same_as].data_offset); |
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305 | n++; |
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306 | } |
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307 | } |
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308 | printf("\n"); |
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309 | |
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310 | printf("/* font_data: */\n"); |
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311 | n = 0; |
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312 | for(b = 0; blocklist[b + 1]; b += 2) |
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313 | { |
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314 | for(i = blocklist[b]; i < blocklist[b + 1]; i++) |
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315 | { |
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316 | /* Print glyph value in comment */ |
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317 | printf("/* "); |
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318 | printf_unicode(>ab[n]); |
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319 | |
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320 | if(gtab[n].same_as == n) |
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321 | printf_hex(" */ %s\n", |
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322 | glyph_data + gtab[n].data_offset, gtab[n].data_size); |
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323 | else |
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324 | { |
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325 | printf(" is "); |
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326 | printf_unicode(>ab[gtab[n].same_as]); |
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327 | printf(" */\n"); |
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328 | } |
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329 | |
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330 | n++; |
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331 | } |
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332 | } |
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333 | |
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334 | printf("};\n"); |
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335 | |
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336 | free(img.buffer); |
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337 | free(gtab); |
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338 | free(glyph_data); |
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339 | g_object_unref(l); |
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340 | g_object_unref(cx); |
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341 | |
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342 | return 0; |
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343 | } |
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344 | |
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345 | /* |
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346 | * XXX: the following functions are local |
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347 | */ |
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348 | |
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349 | static void fix_glyph(FT_Bitmap *i, uint32_t ch, |
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350 | unsigned int width, unsigned int height) |
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351 | { |
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352 | unsigned int x, y; |
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353 | |
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354 | switch(ch) |
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355 | { |
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356 | case 0x00002580: /* ▀ */ |
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357 | for(y = 0; y < height; y++) |
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358 | for(x = 0; x < width; x++) |
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359 | i->buffer[x + y * i->pitch] = y < height / 2 ? 0xff : 0x00; |
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360 | if(height & 1) |
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361 | for(x = 0; x < width; x++) |
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362 | i->buffer[x + (height / 2) * i->pitch] = 0x7f; |
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363 | break; |
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364 | case 0x00002584: /* ▄ */ |
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365 | for(y = 0; y < height; y++) |
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366 | for(x = 0; x < width; x++) |
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367 | i->buffer[x + y * i->pitch] = y < height / 2 ? 0x00 : 0xff; |
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368 | if(height & 1) |
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369 | for(x = 0; x < width; x++) |
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370 | i->buffer[x + (height / 2) * i->pitch] = 0x7f; |
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371 | break; |
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372 | case 0x0000258c: /* ▌ */ |
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373 | for(y = 0; y < height; y++) |
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374 | for(x = 0; x < width; x++) |
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375 | i->buffer[x + y * i->pitch] = x < width / 2 ? 0xff : 0x00; |
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376 | if(width & 1) |
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377 | for(y = 0; y < height; y++) |
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378 | i->buffer[(width / 2) + y * i->pitch] = 0x7f; |
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379 | break; |
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380 | case 0x00002590: /* ▐ */ |
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381 | for(y = 0; y < height; y++) |
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382 | for(x = 0; x < width; x++) |
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383 | i->buffer[x + y * i->pitch] = x < width / 2 ? 0x00 : 0xff; |
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384 | if(width & 1) |
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385 | for(y = 0; y < height; y++) |
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386 | i->buffer[(width / 2) + y * i->pitch] = 0x7f; |
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387 | break; |
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388 | case 0x000025a0: /* ■ */ |
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389 | for(y = 0; y < height; y++) |
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390 | for(x = 0; x < width; x++) |
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391 | i->buffer[x + y * i->pitch] = |
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392 | (y >= height / 4) && (y < 3 * height / 4) ? 0xff : 0x00; |
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393 | if(height & 3) |
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394 | for(x = 0; x < width; x++) /* FIXME: could be more precise */ |
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395 | i->buffer[x + (height / 4) * i->pitch] = |
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396 | i->buffer[x + (3 * height / 4) * i->pitch] = 0x7f; |
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397 | break; |
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398 | case 0x00002588: /* █ */ |
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399 | memset(i->buffer, 0xff, height * i->pitch); |
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400 | break; |
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401 | case 0x00002593: /* ▓ */ |
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402 | for(y = 0; y < height; y++) |
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403 | for(x = 0; x < width; x++) |
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404 | i->buffer[x + y * i->pitch] = |
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405 | ((x + 2 * (y & 1)) & 3) ? 0xff : 0x00; |
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406 | break; |
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407 | case 0x00002592: /* ▒ */ |
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408 | for(y = 0; y < height; y++) |
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409 | for(x = 0; x < width; x++) |
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410 | i->buffer[x + y * i->pitch] = ((x + y) & 1) ? 0xff : 0x00; |
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411 | break; |
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412 | case 0x00002591: /* ░ */ |
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413 | for(y = 0; y < height; y++) |
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414 | for(x = 0; x < width; x++) |
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415 | i->buffer[x + y * i->pitch] = |
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416 | ((x + 2 * (y & 1)) & 3) ? 0x00 : 0xff; |
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417 | break; |
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418 | } |
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419 | } |
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420 | |
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421 | static int printf_unicode(struct glyph *g) |
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422 | { |
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423 | int wr = 0; |
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424 | |
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425 | wr += printf("U+%.04X: \"", g->unicode); |
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426 | |
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427 | if(g->unicode < 0x20 || (g->unicode >= 0x7f && g->unicode <= 0xa0)) |
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428 | wr += printf("\\x%.02x\"", g->unicode); |
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429 | else |
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430 | wr += printf("%s\"", g->buf); |
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431 | |
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432 | return wr; |
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433 | } |
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434 | |
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435 | static int printf_u32(char const *fmt, uint32_t i) |
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436 | { |
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437 | uint32_t ni = htonl(i); |
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438 | return printf_hex(fmt, (uint8_t *)&ni, 4); |
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439 | } |
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440 | |
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441 | static int printf_u16(char const *fmt, uint16_t i) |
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442 | { |
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443 | uint16_t ni = htons(i); |
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444 | return printf_hex(fmt, (uint8_t *)&ni, 2); |
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445 | } |
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446 | |
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447 | static int printf_hex(char const *fmt, uint8_t *data, int bytes) |
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448 | { |
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449 | char buf[BUFSIZ]; |
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450 | char *parser = buf; |
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451 | |
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452 | while(bytes--) |
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453 | parser += sprintf(parser, "%i,", (unsigned int)*data++); |
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454 | parser[0] = '\0'; |
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455 | |
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456 | return printf(fmt, buf); |
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457 | } |
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458 | |
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