| 1 | /* |
| 2 | * Copyright (C) 1989-95 GROUPE BULL |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 5 | * of this software and associated documentation files (the "Software"), to |
| 6 | * deal in the Software without restriction, including without limitation the |
| 7 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 8 | * sell copies of the Software, and to permit persons to whom the Software is |
| 9 | * furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice shall be included in |
| 12 | * all copies or substantial portions of the Software. |
| 13 | * |
| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 17 | * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
| 18 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 19 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 20 | * |
| 21 | * Except as contained in this notice, the name of GROUPE BULL shall not be |
| 22 | * used in advertising or otherwise to promote the sale, use or other dealings |
| 23 | * in this Software without prior written authorization from GROUPE BULL. |
| 24 | */ |
| 25 | |
| 26 | /*****************************************************************************\ |
| 27 | * rgb.c: * |
| 28 | * * |
| 29 | * XPM library * |
| 30 | * Rgb file utilities * |
| 31 | * * |
| 32 | * Developed by Arnaud Le Hors * |
| 33 | \*****************************************************************************/ |
| 34 | |
| 35 | /* |
| 36 | * The code related to FOR_MSW has been added by |
| 37 | * HeDu (hedu@cul-ipn.uni-kiel.de) 4/94 |
| 38 | */ |
| 39 | |
| 40 | /* |
| 41 | * Part of this code has been taken from the ppmtoxpm.c file written by Mark |
| 42 | * W. Snitily but has been modified for my special need |
| 43 | */ |
| 44 | |
| 45 | #include "XpmI.h" |
| 46 | #include <ctype.h> |
| 47 | |
| 48 | #ifndef FOR_MSW /* normal part first, MSW part at |
| 49 | * the end, (huge ifdef!) */ |
| 50 | /* |
| 51 | * Read a rgb text file. It stores the rgb values (0->65535) |
| 52 | * and the rgb mnemonics (malloc'ed) into the "rgbn" array. Returns the |
| 53 | * number of entries stored. |
| 54 | */ |
| 55 | int |
| 56 | xpmReadRgbNames(rgb_fname, rgbn) |
| 57 | char *rgb_fname; |
| 58 | xpmRgbName rgbn[]; |
| 59 | |
| 60 | { |
| 61 | FILE *rgbf; |
| 62 | int n, items, red, green, blue; |
| 63 | char line[512], name[512], *rgbname, *s1, *s2; |
| 64 | xpmRgbName *rgb; |
| 65 | |
| 66 | /* Open the rgb text file. Abort if error. */ |
| 67 | if ((rgbf = fopen(rgb_fname, "r")) == NULL) |
| 68 | return 0; |
| 69 | |
| 70 | /* Loop reading each line in the file. */ |
| 71 | n = 0; |
| 72 | rgb = rgbn; |
| 73 | /* Quit if rgb text file has too many entries. */ |
| 74 | while (fgets(line, sizeof(line), rgbf) && n < MAX_RGBNAMES) { |
| 75 | |
| 76 | /* Skip silently if line is bad. */ |
| 77 | items = sscanf(line, "%d %d %d %[^\n]\n", &red, &green, &blue, name); |
| 78 | if (items != 4) |
| 79 | continue; |
| 80 | |
| 81 | /* |
| 82 | * Make sure rgb values are within 0->255 range. Skip silently if |
| 83 | * bad. |
| 84 | */ |
| 85 | if (red < 0 || red > 0xFF || |
| 86 | green < 0 || green > 0xFF || |
| 87 | blue < 0 || blue > 0xFF) |
| 88 | continue; |
| 89 | |
| 90 | /* Allocate memory for ascii name. If error give up here. */ |
| 91 | if (!(rgbname = (char *) XpmMalloc(strlen(name) + 1))) |
| 92 | break; |
| 93 | |
| 94 | /* Copy string to ascii name and lowercase it. */ |
| 95 | for (s1 = name, s2 = rgbname; *s1; s1++) |
| 96 | *s2++ = tolower(*s1); |
| 97 | *s2 = '\0'; |
| 98 | |
| 99 | /* Save the rgb values and ascii name in the array. */ |
| 100 | rgb->r = red * 257; /* 65535/255 = 257 */ |
| 101 | rgb->g = green * 257; |
| 102 | rgb->b = blue * 257; |
| 103 | rgb->name = rgbname; |
| 104 | rgb++; |
| 105 | n++; |
| 106 | } |
| 107 | |
| 108 | fclose(rgbf); |
| 109 | |
| 110 | /* Return the number of read rgb names. */ |
| 111 | return n < 0 ? 0 : n; |
| 112 | } |
| 113 | |
| 114 | /* |
| 115 | * Return the color name corresponding to the given rgb values |
| 116 | */ |
| 117 | char * |
| 118 | xpmGetRgbName(rgbn, rgbn_max, red, green, blue) |
| 119 | xpmRgbName rgbn[]; /* rgb mnemonics from rgb text file */ |
| 120 | int rgbn_max; /* number of rgb mnemonics in table */ |
| 121 | int red, green, blue; /* rgb values */ |
| 122 | |
| 123 | { |
| 124 | int i; |
| 125 | xpmRgbName *rgb; |
| 126 | |
| 127 | /* |
| 128 | * Just perform a dumb linear search over the rgb values of the color |
| 129 | * mnemonics. One could speed things up by sorting the rgb values and |
| 130 | * using a binary search, or building a hash table, etc... |
| 131 | */ |
| 132 | for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++) |
| 133 | if (red == rgb->r && green == rgb->g && blue == rgb->b) |
| 134 | return rgb->name; |
| 135 | |
| 136 | /* if not found return NULL */ |
| 137 | return NULL; |
| 138 | } |
| 139 | |
| 140 | /* |
| 141 | * Free the strings which have been malloc'ed in xpmReadRgbNames |
| 142 | */ |
| 143 | void |
| 144 | xpmFreeRgbNames(rgbn, rgbn_max) |
| 145 | xpmRgbName rgbn[]; |
| 146 | int rgbn_max; |
| 147 | |
| 148 | { |
| 149 | int i; |
| 150 | xpmRgbName *rgb; |
| 151 | |
| 152 | for (i = 0, rgb = rgbn; i < rgbn_max; i++, rgb++) |
| 153 | XpmFree(rgb->name); |
| 154 | } |
| 155 | |
| 156 | #else /* here comes the MSW part, the |
| 157 | * second part of the huge ifdef */ |
| 158 | |
| 159 | #include "rgbtab.h" /* hard coded rgb.txt table */ |
| 160 | |
| 161 | #ifdef __OS2__ |
| 162 | /* Visual Age cannot deal with old, non-ansi, code */ |
| 163 | int xpmReadRgbNames(char* rgb_fname, xpmRgbName rgbn[]) |
| 164 | #else |
| 165 | int |
| 166 | xpmReadRgbNames(rgb_fname, rgbn) |
| 167 | char *rgb_fname; |
| 168 | xpmRgbName rgbn[]; |
| 169 | #endif |
| 170 | { |
| 171 | /* |
| 172 | * check for consistency??? |
| 173 | * table has to be sorted for calls on strcasecmp |
| 174 | */ |
| 175 | return (numTheRGBRecords); |
| 176 | } |
| 177 | |
| 178 | /* |
| 179 | * MSW rgb values are made from 3 BYTEs, this is different from X XColor.red, |
| 180 | * which has something like #0303 for one color |
| 181 | */ |
| 182 | #ifdef __OS2__ |
| 183 | /* Visual Age cannot deal with old, non-ansi, code */ |
| 184 | char* xpmGetRgbName(xpmRgbName rgbn[], int rgbn_max, int red, int green, int blue) |
| 185 | #else |
| 186 | char * |
| 187 | xpmGetRgbName(rgbn, rgbn_max, red, green, blue) |
| 188 | xpmRgbName rgbn[]; /* rgb mnemonics from rgb text file |
| 189 | * not used */ |
| 190 | int rgbn_max; /* not used */ |
| 191 | int red, green, blue; /* rgb values */ |
| 192 | #endif |
| 193 | { |
| 194 | int i; |
| 195 | unsigned long rgbVal; |
| 196 | |
| 197 | i = 0; |
| 198 | while (i < numTheRGBRecords) { |
| 199 | rgbVal = theRGBRecords[i].rgb; |
| 200 | if (GetRValue(rgbVal) == red && |
| 201 | GetGValue(rgbVal) == green && |
| 202 | GetBValue(rgbVal) == blue) |
| 203 | return (theRGBRecords[i].name); |
| 204 | i++; |
| 205 | } |
| 206 | return (NULL); |
| 207 | } |
| 208 | |
| 209 | /* used in XParseColor in simx.c */ |
| 210 | #ifdef __OS2__ |
| 211 | /* Visual Age cannot deal with old, non-ansi, code */ |
| 212 | int xpmGetRGBfromName(char* inname, int* r, int* g, int* b) |
| 213 | #else |
| 214 | int |
| 215 | xpmGetRGBfromName(inname, r, g, b) |
| 216 | char *inname; |
| 217 | int *r, *g, *b; |
| 218 | #endif |
| 219 | { |
| 220 | int left, right, middle; |
| 221 | int cmp; |
| 222 | unsigned long rgbVal; |
| 223 | char *name; |
| 224 | char *grey, *p; |
| 225 | |
| 226 | name = xpmstrdup(inname); |
| 227 | |
| 228 | /* |
| 229 | * the table in rgbtab.c has no names with spaces, and no grey, but a |
| 230 | * lot of gray |
| 231 | */ |
| 232 | /* so first extract ' ' */ |
| 233 | while (p = strchr(name, ' ')) { |
| 234 | while (*(p)) { /* till eof of string */ |
| 235 | *p = *(p + 1); /* copy to the left */ |
| 236 | p++; |
| 237 | } |
| 238 | } |
| 239 | /* fold to lower case */ |
| 240 | p = name; |
| 241 | while (*p) { |
| 242 | *p = tolower(*p); |
| 243 | p++; |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * substitute Grey with Gray, else rgbtab.h would have more than 100 |
| 248 | * 'duplicate' entries |
| 249 | */ |
| 250 | if (grey = strstr(name, "grey")) |
| 251 | grey[2] = 'a'; |
| 252 | |
| 253 | /* binary search */ |
| 254 | left = 0; |
| 255 | right = numTheRGBRecords - 1; |
| 256 | do { |
| 257 | middle = (left + right) / 2; |
| 258 | cmp = xpmstrcasecmp(name, theRGBRecords[middle].name); |
| 259 | if (cmp == 0) { |
| 260 | rgbVal = theRGBRecords[middle].rgb; |
| 261 | *r = GetRValue(rgbVal); |
| 262 | *g = GetGValue(rgbVal); |
| 263 | *b = GetBValue(rgbVal); |
| 264 | free(name); |
| 265 | return (1); |
| 266 | } else if (cmp < 0) { |
| 267 | right = middle - 1; |
| 268 | } else { /* > 0 */ |
| 269 | left = middle + 1; |
| 270 | } |
| 271 | } while (left <= right); |
| 272 | |
| 273 | /* |
| 274 | * I don't like to run in a ColorInvalid error and to see no pixmap at |
| 275 | * all, so simply return a red pixel. Should be wrapped in an #ifdef |
| 276 | * HeDu |
| 277 | */ |
| 278 | |
| 279 | *r = 255; |
| 280 | *g = 0; |
| 281 | *b = 0; /* red error pixel */ |
| 282 | |
| 283 | free(name); |
| 284 | return (1); |
| 285 | } |
| 286 | |
| 287 | #ifdef __OS2__ |
| 288 | /* Visual Age cannot deal with old, non-ansi, code */ |
| 289 | void xpmFreeRgbNames(xpmRgbName rgbn[], int rgbn_max) |
| 290 | #else |
| 291 | void |
| 292 | xpmFreeRgbNames(rgbn, rgbn_max) |
| 293 | xpmRgbName rgbn[]; |
| 294 | int rgbn_max; |
| 295 | #endif |
| 296 | { |
| 297 | /* nothing to do */ |
| 298 | } |
| 299 | |
| 300 | #endif /* MSW part */ |