| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include "halibut.h" |
| 4 | #include "paper.h" |
| 5 | |
| 6 | char *afm_read_line(input *in) { |
| 7 | int i, len = 256; |
| 8 | int c; |
| 9 | char *line; |
| 10 | |
| 11 | do { |
| 12 | i = 0; |
| 13 | in->pos.line++; |
| 14 | c = getc(in->currfp); |
| 15 | if (c == EOF) { |
| 16 | error(err_afmeof, &in->pos); |
| 17 | return NULL; |
| 18 | } |
| 19 | line = snewn(len, char); |
| 20 | while (c != EOF && c != '\r' && c != '\n') { |
| 21 | if (i >= len - 1) { |
| 22 | len += 256; |
| 23 | line = sresize(line, len, char); |
| 24 | } |
| 25 | line[i++] = c; |
| 26 | c = getc(in->currfp); |
| 27 | } |
| 28 | if (c == '\r') { |
| 29 | /* Cope with CRLF terminated lines */ |
| 30 | c = getc(in->currfp); |
| 31 | if (c != '\n' && c != EOF) |
| 32 | ungetc(c, in->currfp); |
| 33 | } |
| 34 | line[i] = 0; |
| 35 | } while (line[(strspn(line, " \t"))] == 0 || |
| 36 | strncmp(line, "Comment ", 8) == 0 || |
| 37 | strncmp(line, "Comment\t", 8) == 0); |
| 38 | |
| 39 | return line; |
| 40 | } |
| 41 | |
| 42 | static int afm_require_key(char *line, char const *expected, input *in) { |
| 43 | char *key = strtok(line, " \t"); |
| 44 | |
| 45 | if (strcmp(key, expected) == 0) |
| 46 | return TRUE; |
| 47 | error(err_afmkey, &in->pos, expected); |
| 48 | return FALSE; |
| 49 | } |
| 50 | |
| 51 | void read_afm_file(input *in) { |
| 52 | char *line, *key, *val; |
| 53 | font_info *fi; |
| 54 | size_t i; |
| 55 | |
| 56 | fi = snew(font_info); |
| 57 | fi->name = NULL; |
| 58 | fi->widths = newtree234(width_cmp); |
| 59 | fi->fontfile = NULL; |
| 60 | fi->kerns = newtree234(kern_cmp); |
| 61 | fi->ligs = newtree234(lig_cmp); |
| 62 | fi->fontbbox[0] = fi->fontbbox[1] = fi->fontbbox[2] = fi->fontbbox[3] = 0; |
| 63 | fi->capheight = fi->xheight = fi->ascent = fi->descent = 0; |
| 64 | fi->stemh = fi->stemv = fi->italicangle = 0; |
| 65 | for (i = 0; i < lenof(fi->bmp); i++) |
| 66 | fi->bmp[i] = 0xFFFF; |
| 67 | in->pos.line = 0; |
| 68 | line = afm_read_line(in); |
| 69 | if (!line || !afm_require_key(line, "StartFontMetrics", in)) |
| 70 | goto giveup; |
| 71 | if (!(val = strtok(NULL, " \t"))) { |
| 72 | error(err_afmval, in->pos, "StartFontMetrics", 1); |
| 73 | goto giveup; |
| 74 | } |
| 75 | if (atof(val) >= 5.0) { |
| 76 | error(err_afmvers, &in->pos); |
| 77 | goto giveup; |
| 78 | } |
| 79 | sfree(line); |
| 80 | for (;;) { |
| 81 | line = afm_read_line(in); |
| 82 | if (line == NULL) |
| 83 | goto giveup; |
| 84 | key = strtok(line, " \t"); |
| 85 | if (strcmp(key, "EndFontMetrics") == 0) { |
| 86 | fi->next = all_fonts; |
| 87 | all_fonts = fi; |
| 88 | fclose(in->currfp); |
| 89 | return; |
| 90 | } else if (strcmp(key, "FontName") == 0) { |
| 91 | if (!(val = strtok(NULL, " \t"))) { |
| 92 | error(err_afmval, &in->pos, key, 1); |
| 93 | goto giveup; |
| 94 | } |
| 95 | fi->name = dupstr(val); |
| 96 | } else if (strcmp(key, "FontBBox") == 0) { |
| 97 | int i; |
| 98 | for (i = 0; i < 3; i++) { |
| 99 | if (!(val = strtok(NULL, " \t"))) { |
| 100 | error(err_afmval, &in->pos, key, 4); |
| 101 | goto giveup; |
| 102 | } |
| 103 | fi->fontbbox[i] = atof(val); |
| 104 | } |
| 105 | } else if (strcmp(key, "CapHeight") == 0) { |
| 106 | if (!(val = strtok(NULL, " \t"))) { |
| 107 | error(err_afmval, &in->pos, key, 1); |
| 108 | goto giveup; |
| 109 | } |
| 110 | fi->capheight = atof(val); |
| 111 | } else if (strcmp(key, "XHeight") == 0) { |
| 112 | if (!(val = strtok(NULL, " \t"))) { |
| 113 | error(err_afmval, &in->pos, key, 1); |
| 114 | goto giveup; |
| 115 | } |
| 116 | fi->xheight = atof(val); |
| 117 | } else if (strcmp(key, "Ascender") == 0) { |
| 118 | if (!(val = strtok(NULL, " \t"))) { |
| 119 | error(err_afmval, &in->pos, key, 1); |
| 120 | goto giveup; |
| 121 | } |
| 122 | fi->ascent = atof(val); |
| 123 | } else if (strcmp(key, "Descender") == 0) { |
| 124 | if (!(val = strtok(NULL, " \t"))) { |
| 125 | error(err_afmval, &in->pos, key, 1); |
| 126 | goto giveup; |
| 127 | } |
| 128 | fi->descent = atof(val); |
| 129 | } else if (strcmp(key, "CapHeight") == 0) { |
| 130 | if (!(val = strtok(NULL, " \t"))) { |
| 131 | error(err_afmval, &in->pos, key, 1); |
| 132 | goto giveup; |
| 133 | } |
| 134 | fi->capheight = atof(val); |
| 135 | } else if (strcmp(key, "StdHW") == 0) { |
| 136 | if (!(val = strtok(NULL, " \t"))) { |
| 137 | error(err_afmval, &in->pos, key, 1); |
| 138 | goto giveup; |
| 139 | } |
| 140 | fi->stemh = atof(val); |
| 141 | } else if (strcmp(key, "StdVW") == 0) { |
| 142 | if (!(val = strtok(NULL, " \t"))) { |
| 143 | error(err_afmval, &in->pos, key, 1); |
| 144 | goto giveup; |
| 145 | } |
| 146 | fi->stemv = atof(val); |
| 147 | } else if (strcmp(key, "ItalicAngle") == 0) { |
| 148 | if (!(val = strtok(NULL, " \t"))) { |
| 149 | error(err_afmval, &in->pos, key, 1); |
| 150 | goto giveup; |
| 151 | } |
| 152 | fi->italicangle = atof(val); |
| 153 | } else if (strcmp(key, "StartCharMetrics") == 0) { |
| 154 | int nglyphs, i; |
| 155 | if (!(val = strtok(NULL, " \t"))) { |
| 156 | error(err_afmval, &in->pos, key, 1); |
| 157 | goto giveup; |
| 158 | } |
| 159 | nglyphs = atoi(val); |
| 160 | sfree(line); |
| 161 | for (i = 0; i < nglyphs; i++) { |
| 162 | int width = 0; |
| 163 | glyph g = NOGLYPH; |
| 164 | |
| 165 | line = afm_read_line(in); |
| 166 | if (line == NULL) |
| 167 | goto giveup; |
| 168 | key = strtok(line, " \t"); |
| 169 | while (key != NULL) { |
| 170 | if (strcmp(key, "WX") == 0 || strcmp(key, "W0X") == 0) { |
| 171 | if (!(val = strtok(NULL, " \t")) || |
| 172 | !strcmp(val, ";")) { |
| 173 | error(err_afmval, &in->pos, key, 1); |
| 174 | goto giveup; |
| 175 | } |
| 176 | width = atoi(val); |
| 177 | } else if (strcmp(key, "N") == 0) { |
| 178 | if (!(val = strtok(NULL, " \t")) || |
| 179 | !strcmp(val, ";")) { |
| 180 | error(err_afmval, &in->pos, key, 1); |
| 181 | goto giveup; |
| 182 | } |
| 183 | g = glyph_intern(val); |
| 184 | } else if (strcmp(key, "L") == 0) { |
| 185 | glyph succ, lig; |
| 186 | if (!(val = strtok(NULL, " \t")) || |
| 187 | !strcmp(val, ";")) { |
| 188 | error(err_afmval, &in->pos, key, 1); |
| 189 | goto giveup; |
| 190 | } |
| 191 | succ = glyph_intern(val); |
| 192 | if (!(val = strtok(NULL, " \t")) || |
| 193 | !strcmp(val, ";")) { |
| 194 | error(err_afmval, &in->pos, key, 1); |
| 195 | goto giveup; |
| 196 | } |
| 197 | lig = glyph_intern(val); |
| 198 | if (g != NOGLYPH && succ != NOGLYPH && |
| 199 | lig != NOGLYPH) { |
| 200 | ligature *l = snew(ligature); |
| 201 | l->left = g; |
| 202 | l->right = succ; |
| 203 | l->lig = lig; |
| 204 | add234(fi->ligs, l); |
| 205 | } |
| 206 | } |
| 207 | do { |
| 208 | key = strtok(NULL, " \t"); |
| 209 | } while (key && strcmp(key, ";")); |
| 210 | key = strtok(NULL, " \t"); |
| 211 | } |
| 212 | sfree(line); |
| 213 | if (width != 0 && g != NOGLYPH) { |
| 214 | wchar_t ucs; |
| 215 | glyph_width *w = snew(glyph_width); |
| 216 | w->glyph = g; |
| 217 | w->width = width; |
| 218 | add234(fi->widths, w); |
| 219 | ucs = ps_glyph_to_unicode(g); |
| 220 | if (ucs < 0xFFFF) |
| 221 | fi->bmp[ucs] = g; |
| 222 | } |
| 223 | } |
| 224 | line = afm_read_line(in); |
| 225 | if (!line || !afm_require_key(line, "EndCharMetrics", in)) |
| 226 | goto giveup; |
| 227 | sfree(line); |
| 228 | |
| 229 | } else if (strcmp(key, "StartKernPairs") == 0 || |
| 230 | strcmp(key, "StartKernPairs0") == 0) { |
| 231 | int nkerns, i; |
| 232 | kern_pair *kerns; |
| 233 | if (!(val = strtok(NULL, " \t"))) { |
| 234 | error(err_afmval, &in->pos, key, 1); |
| 235 | goto giveup; |
| 236 | } |
| 237 | nkerns = atoi(val); |
| 238 | sfree(line); |
| 239 | kerns = snewn(nkerns, kern_pair); |
| 240 | for (i = 0; i < nkerns; i++) { |
| 241 | line = afm_read_line(in); |
| 242 | if (line == NULL) |
| 243 | goto giveup; |
| 244 | key = strtok(line, " \t"); |
| 245 | if (strcmp(key, "KPX") == 0) { |
| 246 | char *nl, *nr; |
| 247 | int l, r; |
| 248 | kern_pair *kp; |
| 249 | nl = strtok(NULL, " \t"); |
| 250 | nr = strtok(NULL, " \t"); |
| 251 | val = strtok(NULL, " \t"); |
| 252 | if (!val) { |
| 253 | error(err_afmval, &in->pos, key, 3); |
| 254 | goto giveup; |
| 255 | } |
| 256 | l = glyph_intern(nl); |
| 257 | r = glyph_intern(nr); |
| 258 | if (l == -1 || r == -1) continue; |
| 259 | kp = snew(kern_pair); |
| 260 | kp->left = l; |
| 261 | kp->right = r; |
| 262 | kp->kern = atoi(val); |
| 263 | add234(fi->kerns, kp); |
| 264 | } |
| 265 | } |
| 266 | line = afm_read_line(in); |
| 267 | if (!line || !afm_require_key(line, "EndKernPairs", in)) |
| 268 | goto giveup; |
| 269 | sfree(line); |
| 270 | } |
| 271 | } |
| 272 | giveup: |
| 273 | sfree(fi); |
| 274 | fclose(in->currfp); |
| 275 | return; |
| 276 | } |