| 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 | |
| 55 | fi = snew(font_info); |
| 56 | fi->name = NULL; |
| 57 | fi->nglyphs = 0; |
| 58 | fi->glyphs = NULL; |
| 59 | fi->widths = NULL; |
| 60 | fi->fp = NULL; |
| 61 | fi->kerns = newtree234(kern_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 | in->pos.line = 0; |
| 66 | line = afm_read_line(in); |
| 67 | if (!line || !afm_require_key(line, "StartFontMetrics", in)) |
| 68 | goto giveup; |
| 69 | if (!(val = strtok(NULL, " \t"))) { |
| 70 | error(err_afmval, in->pos, "StartFontMetrics", 1); |
| 71 | goto giveup; |
| 72 | } |
| 73 | if (atof(val) >= 5.0) { |
| 74 | error(err_afmvers, &in->pos); |
| 75 | goto giveup; |
| 76 | } |
| 77 | sfree(line); |
| 78 | for (;;) { |
| 79 | line = afm_read_line(in); |
| 80 | if (line == NULL) |
| 81 | goto giveup; |
| 82 | key = strtok(line, " \t"); |
| 83 | if (strcmp(key, "EndFontMetrics") == 0) { |
| 84 | fi->next = all_fonts; |
| 85 | all_fonts = fi; |
| 86 | fclose(in->currfp); |
| 87 | return; |
| 88 | } else if (strcmp(key, "FontName") == 0) { |
| 89 | if (!(val = strtok(NULL, " \t"))) { |
| 90 | error(err_afmval, &in->pos, key, 1); |
| 91 | goto giveup; |
| 92 | } |
| 93 | fi->name = dupstr(val); |
| 94 | } else if (strcmp(key, "FontBBox") == 0) { |
| 95 | int i; |
| 96 | for (i = 0; i < 3; i++) { |
| 97 | if (!(val = strtok(NULL, " \t"))) { |
| 98 | error(err_afmval, &in->pos, key, 4); |
| 99 | goto giveup; |
| 100 | } |
| 101 | fi->fontbbox[i] = atof(val); |
| 102 | } |
| 103 | } else if (strcmp(key, "CapHeight") == 0) { |
| 104 | if (!(val = strtok(NULL, " \t"))) { |
| 105 | error(err_afmval, &in->pos, key, 1); |
| 106 | goto giveup; |
| 107 | } |
| 108 | fi->capheight = atof(val); |
| 109 | } else if (strcmp(key, "XHeight") == 0) { |
| 110 | if (!(val = strtok(NULL, " \t"))) { |
| 111 | error(err_afmval, &in->pos, key, 1); |
| 112 | goto giveup; |
| 113 | } |
| 114 | fi->xheight = atof(val); |
| 115 | } else if (strcmp(key, "Ascender") == 0) { |
| 116 | if (!(val = strtok(NULL, " \t"))) { |
| 117 | error(err_afmval, &in->pos, key, 1); |
| 118 | goto giveup; |
| 119 | } |
| 120 | fi->ascent = atof(val); |
| 121 | } else if (strcmp(key, "Descender") == 0) { |
| 122 | if (!(val = strtok(NULL, " \t"))) { |
| 123 | error(err_afmval, &in->pos, key, 1); |
| 124 | goto giveup; |
| 125 | } |
| 126 | fi->descent = atof(val); |
| 127 | } else if (strcmp(key, "CapHeight") == 0) { |
| 128 | if (!(val = strtok(NULL, " \t"))) { |
| 129 | error(err_afmval, &in->pos, key, 1); |
| 130 | goto giveup; |
| 131 | } |
| 132 | fi->capheight = atof(val); |
| 133 | } else if (strcmp(key, "StdHW") == 0) { |
| 134 | if (!(val = strtok(NULL, " \t"))) { |
| 135 | error(err_afmval, &in->pos, key, 1); |
| 136 | goto giveup; |
| 137 | } |
| 138 | fi->stemh = atof(val); |
| 139 | } else if (strcmp(key, "StdVW") == 0) { |
| 140 | if (!(val = strtok(NULL, " \t"))) { |
| 141 | error(err_afmval, &in->pos, key, 1); |
| 142 | goto giveup; |
| 143 | } |
| 144 | fi->stemv = atof(val); |
| 145 | } else if (strcmp(key, "ItalicAngle") == 0) { |
| 146 | if (!(val = strtok(NULL, " \t"))) { |
| 147 | error(err_afmval, &in->pos, key, 1); |
| 148 | goto giveup; |
| 149 | } |
| 150 | fi->italicangle = atof(val); |
| 151 | } else if (strcmp(key, "StartCharMetrics") == 0) { |
| 152 | char const **glyphs; |
| 153 | int *widths; |
| 154 | int i; |
| 155 | if (!(val = strtok(NULL, " \t"))) { |
| 156 | error(err_afmval, &in->pos, key, 1); |
| 157 | goto giveup; |
| 158 | } |
| 159 | fi->nglyphs = atoi(val); |
| 160 | sfree(line); |
| 161 | glyphs = snewn(fi->nglyphs, char const *); |
| 162 | widths = snewn(fi->nglyphs, int); |
| 163 | for (i = 0; i < fi->nglyphs; i++) { |
| 164 | glyphs[i] = NULL; |
| 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 | widths[i] = 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 | glyphs[i] = dupstr(val); |
| 184 | } |
| 185 | do { |
| 186 | key = strtok(NULL, " \t"); |
| 187 | } while (key && strcmp(key, ";")); |
| 188 | key = strtok(NULL, " \t"); |
| 189 | } |
| 190 | sfree(line); |
| 191 | } |
| 192 | line = afm_read_line(in); |
| 193 | if (!line || !afm_require_key(line, "EndCharMetrics", in)) |
| 194 | goto giveup; |
| 195 | sfree(line); |
| 196 | fi->glyphs = glyphs; |
| 197 | fi->widths = widths; |
| 198 | |
| 199 | for (i = 0; i < fi->nglyphs; i++) { |
| 200 | wchar_t ucs; |
| 201 | ucs = ps_glyph_to_unicode(fi->glyphs[i]); |
| 202 | if (ucs < 0xFFFF) |
| 203 | fi->bmp[ucs] = i; |
| 204 | } |
| 205 | font_index_glyphs(fi); |
| 206 | } else if (strcmp(key, "StartKernPairs") == 0 || |
| 207 | strcmp(key, "StartKernPairs0") == 0) { |
| 208 | int nkerns, i; |
| 209 | kern_pair *kerns; |
| 210 | if (!(val = strtok(NULL, " \t"))) { |
| 211 | error(err_afmval, &in->pos, key, 1); |
| 212 | goto giveup; |
| 213 | } |
| 214 | nkerns = atoi(val); |
| 215 | sfree(line); |
| 216 | kerns = snewn(nkerns, kern_pair); |
| 217 | for (i = 0; i < nkerns; i++) { |
| 218 | line = afm_read_line(in); |
| 219 | if (line == NULL) |
| 220 | goto giveup; |
| 221 | key = strtok(line, " \t"); |
| 222 | if (strcmp(key, "KPX") == 0) { |
| 223 | char *nl, *nr; |
| 224 | int l, r; |
| 225 | kern_pair *kp; |
| 226 | nl = strtok(NULL, " \t"); |
| 227 | nr = strtok(NULL, " \t"); |
| 228 | val = strtok(NULL, " \t"); |
| 229 | if (!val) { |
| 230 | error(err_afmval, &in->pos, key, 3); |
| 231 | goto giveup; |
| 232 | } |
| 233 | l = find_glyph(fi, nl); |
| 234 | r = find_glyph(fi, nr); |
| 235 | if (l == -1 || r == -1) continue; |
| 236 | kp = snew(kern_pair); |
| 237 | kp->left = l; |
| 238 | kp->right = r; |
| 239 | kp->kern = atoi(val); |
| 240 | add234(fi->kerns, kp); |
| 241 | } |
| 242 | } |
| 243 | line = afm_read_line(in); |
| 244 | if (!line || !afm_require_key(line, "EndKernPairs", in)) |
| 245 | goto giveup; |
| 246 | sfree(line); |
| 247 | } |
| 248 | } |
| 249 | giveup: |
| 250 | sfree(fi); |
| 251 | fclose(in->currfp); |
| 252 | return; |
| 253 | } |