Root/
1 | |
2 | /* |
3 | * Convert a logo in ASCII PNM format to C source suitable for inclusion in |
4 | * the Linux kernel |
5 | * |
6 | * (C) Copyright 2001-2003 by Geert Uytterhoeven <geert@linux-m68k.org> |
7 | * |
8 | * -------------------------------------------------------------------------- |
9 | * |
10 | * This file is subject to the terms and conditions of the GNU General Public |
11 | * License. See the file COPYING in the main directory of the Linux |
12 | * distribution for more details. |
13 | */ |
14 | |
15 | #include <ctype.h> |
16 | #include <errno.h> |
17 | #include <stdarg.h> |
18 | #include <stdio.h> |
19 | #include <stdlib.h> |
20 | #include <string.h> |
21 | #include <unistd.h> |
22 | |
23 | |
24 | static const char *programname; |
25 | static const char *filename; |
26 | static const char *logoname = "linux_logo"; |
27 | static const char *outputname; |
28 | static FILE *out; |
29 | |
30 | |
31 | #define LINUX_LOGO_MONO 1 /* monochrome black/white */ |
32 | #define LINUX_LOGO_VGA16 2 /* 16 colors VGA text palette */ |
33 | #define LINUX_LOGO_CLUT224 3 /* 224 colors */ |
34 | #define LINUX_LOGO_GRAY256 4 /* 256 levels grayscale */ |
35 | |
36 | static const char *logo_types[LINUX_LOGO_GRAY256+1] = { |
37 | [LINUX_LOGO_MONO] = "LINUX_LOGO_MONO", |
38 | [LINUX_LOGO_VGA16] = "LINUX_LOGO_VGA16", |
39 | [LINUX_LOGO_CLUT224] = "LINUX_LOGO_CLUT224", |
40 | [LINUX_LOGO_GRAY256] = "LINUX_LOGO_GRAY256" |
41 | }; |
42 | |
43 | #define MAX_LINUX_LOGO_COLORS 224 |
44 | |
45 | struct color { |
46 | unsigned char red; |
47 | unsigned char green; |
48 | unsigned char blue; |
49 | }; |
50 | |
51 | static const struct color clut_vga16[16] = { |
52 | { 0x00, 0x00, 0x00 }, |
53 | { 0x00, 0x00, 0xaa }, |
54 | { 0x00, 0xaa, 0x00 }, |
55 | { 0x00, 0xaa, 0xaa }, |
56 | { 0xaa, 0x00, 0x00 }, |
57 | { 0xaa, 0x00, 0xaa }, |
58 | { 0xaa, 0x55, 0x00 }, |
59 | { 0xaa, 0xaa, 0xaa }, |
60 | { 0x55, 0x55, 0x55 }, |
61 | { 0x55, 0x55, 0xff }, |
62 | { 0x55, 0xff, 0x55 }, |
63 | { 0x55, 0xff, 0xff }, |
64 | { 0xff, 0x55, 0x55 }, |
65 | { 0xff, 0x55, 0xff }, |
66 | { 0xff, 0xff, 0x55 }, |
67 | { 0xff, 0xff, 0xff }, |
68 | }; |
69 | |
70 | |
71 | static int logo_type = LINUX_LOGO_CLUT224; |
72 | static unsigned int logo_width; |
73 | static unsigned int logo_height; |
74 | static struct color **logo_data; |
75 | static struct color logo_clut[MAX_LINUX_LOGO_COLORS]; |
76 | static unsigned int logo_clutsize; |
77 | static int is_plain_pbm = 0; |
78 | |
79 | static void die(const char *fmt, ...) |
80 | __attribute__ ((noreturn)) __attribute ((format (printf, 1, 2))); |
81 | static void usage(void) __attribute ((noreturn)); |
82 | |
83 | |
84 | static unsigned int get_number(FILE *fp) |
85 | { |
86 | int c, val; |
87 | |
88 | /* Skip leading whitespace */ |
89 | do { |
90 | c = fgetc(fp); |
91 | if (c == EOF) |
92 | die("%s: end of file\n", filename); |
93 | if (c == '#') { |
94 | /* Ignore comments 'till end of line */ |
95 | do { |
96 | c = fgetc(fp); |
97 | if (c == EOF) |
98 | die("%s: end of file\n", filename); |
99 | } while (c != '\n'); |
100 | } |
101 | } while (isspace(c)); |
102 | |
103 | /* Parse decimal number */ |
104 | val = 0; |
105 | while (isdigit(c)) { |
106 | val = 10*val+c-'0'; |
107 | /* some PBM are 'broken'; GiMP for example exports a PBM without space |
108 | * between the digits. This is Ok cause we know a PBM can only have a '1' |
109 | * or a '0' for the digit. */ |
110 | if (is_plain_pbm) |
111 | break; |
112 | c = fgetc(fp); |
113 | if (c == EOF) |
114 | die("%s: end of file\n", filename); |
115 | } |
116 | return val; |
117 | } |
118 | |
119 | static unsigned int get_number255(FILE *fp, unsigned int maxval) |
120 | { |
121 | unsigned int val = get_number(fp); |
122 | return (255*val+maxval/2)/maxval; |
123 | } |
124 | |
125 | static void read_image(void) |
126 | { |
127 | FILE *fp; |
128 | unsigned int i, j; |
129 | int magic; |
130 | unsigned int maxval; |
131 | |
132 | /* open image file */ |
133 | fp = fopen(filename, "r"); |
134 | if (!fp) |
135 | die("Cannot open file %s: %s\n", filename, strerror(errno)); |
136 | |
137 | /* check file type and read file header */ |
138 | magic = fgetc(fp); |
139 | if (magic != 'P') |
140 | die("%s is not a PNM file\n", filename); |
141 | magic = fgetc(fp); |
142 | switch (magic) { |
143 | case '1': |
144 | case '2': |
145 | case '3': |
146 | /* Plain PBM/PGM/PPM */ |
147 | break; |
148 | |
149 | case '4': |
150 | case '5': |
151 | case '6': |
152 | /* Binary PBM/PGM/PPM */ |
153 | die("%s: Binary PNM is not supported\n" |
154 | "Use pnmnoraw(1) to convert it to ASCII PNM\n", filename); |
155 | |
156 | default: |
157 | die("%s is not a PNM file\n", filename); |
158 | } |
159 | logo_width = get_number(fp); |
160 | logo_height = get_number(fp); |
161 | |
162 | /* allocate image data */ |
163 | logo_data = (struct color **)malloc(logo_height*sizeof(struct color *)); |
164 | if (!logo_data) |
165 | die("%s\n", strerror(errno)); |
166 | for (i = 0; i < logo_height; i++) { |
167 | logo_data[i] = malloc(logo_width*sizeof(struct color)); |
168 | if (!logo_data[i]) |
169 | die("%s\n", strerror(errno)); |
170 | } |
171 | |
172 | /* read image data */ |
173 | switch (magic) { |
174 | case '1': |
175 | /* Plain PBM */ |
176 | is_plain_pbm = 1; |
177 | for (i = 0; i < logo_height; i++) |
178 | for (j = 0; j < logo_width; j++) |
179 | logo_data[i][j].red = logo_data[i][j].green = |
180 | logo_data[i][j].blue = 255*(1-get_number(fp)); |
181 | break; |
182 | |
183 | case '2': |
184 | /* Plain PGM */ |
185 | maxval = get_number(fp); |
186 | for (i = 0; i < logo_height; i++) |
187 | for (j = 0; j < logo_width; j++) |
188 | logo_data[i][j].red = logo_data[i][j].green = |
189 | logo_data[i][j].blue = get_number255(fp, maxval); |
190 | break; |
191 | |
192 | case '3': |
193 | /* Plain PPM */ |
194 | maxval = get_number(fp); |
195 | for (i = 0; i < logo_height; i++) |
196 | for (j = 0; j < logo_width; j++) { |
197 | logo_data[i][j].red = get_number255(fp, maxval); |
198 | logo_data[i][j].green = get_number255(fp, maxval); |
199 | logo_data[i][j].blue = get_number255(fp, maxval); |
200 | } |
201 | break; |
202 | } |
203 | |
204 | /* close file */ |
205 | fclose(fp); |
206 | } |
207 | |
208 | static inline int is_black(struct color c) |
209 | { |
210 | return c.red == 0 && c.green == 0 && c.blue == 0; |
211 | } |
212 | |
213 | static inline int is_white(struct color c) |
214 | { |
215 | return c.red == 255 && c.green == 255 && c.blue == 255; |
216 | } |
217 | |
218 | static inline int is_gray(struct color c) |
219 | { |
220 | return c.red == c.green && c.red == c.blue; |
221 | } |
222 | |
223 | static inline int is_equal(struct color c1, struct color c2) |
224 | { |
225 | return c1.red == c2.red && c1.green == c2.green && c1.blue == c2.blue; |
226 | } |
227 | |
228 | static void write_header(void) |
229 | { |
230 | /* open logo file */ |
231 | if (outputname) { |
232 | out = fopen(outputname, "w"); |
233 | if (!out) |
234 | die("Cannot create file %s: %s\n", outputname, strerror(errno)); |
235 | } else { |
236 | out = stdout; |
237 | } |
238 | |
239 | fputs("/*\n", out); |
240 | fputs(" * DO NOT EDIT THIS FILE!\n", out); |
241 | fputs(" *\n", out); |
242 | fprintf(out, " * It was automatically generated from %s\n", filename); |
243 | fputs(" *\n", out); |
244 | fprintf(out, " * Linux logo %s\n", logoname); |
245 | fputs(" */\n\n", out); |
246 | fputs("#include <linux/linux_logo.h>\n\n", out); |
247 | fprintf(out, "static unsigned char %s_data[] __initdata = {\n", |
248 | logoname); |
249 | } |
250 | |
251 | static void write_footer(void) |
252 | { |
253 | fputs("\n};\n\n", out); |
254 | fprintf(out, "const struct linux_logo %s __initconst = {\n", logoname); |
255 | fprintf(out, "\t.type\t\t= %s,\n", logo_types[logo_type]); |
256 | fprintf(out, "\t.width\t\t= %d,\n", logo_width); |
257 | fprintf(out, "\t.height\t\t= %d,\n", logo_height); |
258 | if (logo_type == LINUX_LOGO_CLUT224) { |
259 | fprintf(out, "\t.clutsize\t= %d,\n", logo_clutsize); |
260 | fprintf(out, "\t.clut\t\t= %s_clut,\n", logoname); |
261 | } |
262 | fprintf(out, "\t.data\t\t= %s_data\n", logoname); |
263 | fputs("};\n\n", out); |
264 | |
265 | /* close logo file */ |
266 | if (outputname) |
267 | fclose(out); |
268 | } |
269 | |
270 | static int write_hex_cnt; |
271 | |
272 | static void write_hex(unsigned char byte) |
273 | { |
274 | if (write_hex_cnt % 12) |
275 | fprintf(out, ", 0x%02x", byte); |
276 | else if (write_hex_cnt) |
277 | fprintf(out, ",\n\t0x%02x", byte); |
278 | else |
279 | fprintf(out, "\t0x%02x", byte); |
280 | write_hex_cnt++; |
281 | } |
282 | |
283 | static void write_logo_mono(void) |
284 | { |
285 | unsigned int i, j; |
286 | unsigned char val, bit; |
287 | |
288 | /* validate image */ |
289 | for (i = 0; i < logo_height; i++) |
290 | for (j = 0; j < logo_width; j++) |
291 | if (!is_black(logo_data[i][j]) && !is_white(logo_data[i][j])) |
292 | die("Image must be monochrome\n"); |
293 | |
294 | /* write file header */ |
295 | write_header(); |
296 | |
297 | /* write logo data */ |
298 | for (i = 0; i < logo_height; i++) { |
299 | for (j = 0; j < logo_width;) { |
300 | for (val = 0, bit = 0x80; bit && j < logo_width; j++, bit >>= 1) |
301 | if (logo_data[i][j].red) |
302 | val |= bit; |
303 | write_hex(val); |
304 | } |
305 | } |
306 | |
307 | /* write logo structure and file footer */ |
308 | write_footer(); |
309 | } |
310 | |
311 | static void write_logo_vga16(void) |
312 | { |
313 | unsigned int i, j, k; |
314 | unsigned char val; |
315 | |
316 | /* validate image */ |
317 | for (i = 0; i < logo_height; i++) |
318 | for (j = 0; j < logo_width; j++) { |
319 | for (k = 0; k < 16; k++) |
320 | if (is_equal(logo_data[i][j], clut_vga16[k])) |
321 | break; |
322 | if (k == 16) |
323 | die("Image must use the 16 console colors only\n" |
324 | "Use ppmquant(1) -map clut_vga16.ppm to reduce the number " |
325 | "of colors\n"); |
326 | } |
327 | |
328 | /* write file header */ |
329 | write_header(); |
330 | |
331 | /* write logo data */ |
332 | for (i = 0; i < logo_height; i++) |
333 | for (j = 0; j < logo_width; j++) { |
334 | for (k = 0; k < 16; k++) |
335 | if (is_equal(logo_data[i][j], clut_vga16[k])) |
336 | break; |
337 | val = k<<4; |
338 | if (++j < logo_width) { |
339 | for (k = 0; k < 16; k++) |
340 | if (is_equal(logo_data[i][j], clut_vga16[k])) |
341 | break; |
342 | val |= k; |
343 | } |
344 | write_hex(val); |
345 | } |
346 | |
347 | /* write logo structure and file footer */ |
348 | write_footer(); |
349 | } |
350 | |
351 | static void write_logo_clut224(void) |
352 | { |
353 | unsigned int i, j, k; |
354 | |
355 | /* validate image */ |
356 | for (i = 0; i < logo_height; i++) |
357 | for (j = 0; j < logo_width; j++) { |
358 | for (k = 0; k < logo_clutsize; k++) |
359 | if (is_equal(logo_data[i][j], logo_clut[k])) |
360 | break; |
361 | if (k == logo_clutsize) { |
362 | if (logo_clutsize == MAX_LINUX_LOGO_COLORS) |
363 | die("Image has more than %d colors\n" |
364 | "Use ppmquant(1) to reduce the number of colors\n", |
365 | MAX_LINUX_LOGO_COLORS); |
366 | logo_clut[logo_clutsize++] = logo_data[i][j]; |
367 | } |
368 | } |
369 | |
370 | /* write file header */ |
371 | write_header(); |
372 | |
373 | /* write logo data */ |
374 | for (i = 0; i < logo_height; i++) |
375 | for (j = 0; j < logo_width; j++) { |
376 | for (k = 0; k < logo_clutsize; k++) |
377 | if (is_equal(logo_data[i][j], logo_clut[k])) |
378 | break; |
379 | write_hex(k+32); |
380 | } |
381 | fputs("\n};\n\n", out); |
382 | |
383 | /* write logo clut */ |
384 | fprintf(out, "static unsigned char %s_clut[] __initdata = {\n", |
385 | logoname); |
386 | write_hex_cnt = 0; |
387 | for (i = 0; i < logo_clutsize; i++) { |
388 | write_hex(logo_clut[i].red); |
389 | write_hex(logo_clut[i].green); |
390 | write_hex(logo_clut[i].blue); |
391 | } |
392 | |
393 | /* write logo structure and file footer */ |
394 | write_footer(); |
395 | } |
396 | |
397 | static void write_logo_gray256(void) |
398 | { |
399 | unsigned int i, j; |
400 | |
401 | /* validate image */ |
402 | for (i = 0; i < logo_height; i++) |
403 | for (j = 0; j < logo_width; j++) |
404 | if (!is_gray(logo_data[i][j])) |
405 | die("Image must be grayscale\n"); |
406 | |
407 | /* write file header */ |
408 | write_header(); |
409 | |
410 | /* write logo data */ |
411 | for (i = 0; i < logo_height; i++) |
412 | for (j = 0; j < logo_width; j++) |
413 | write_hex(logo_data[i][j].red); |
414 | |
415 | /* write logo structure and file footer */ |
416 | write_footer(); |
417 | } |
418 | |
419 | static void die(const char *fmt, ...) |
420 | { |
421 | va_list ap; |
422 | |
423 | va_start(ap, fmt); |
424 | vfprintf(stderr, fmt, ap); |
425 | va_end(ap); |
426 | |
427 | exit(1); |
428 | } |
429 | |
430 | static void usage(void) |
431 | { |
432 | die("\n" |
433 | "Usage: %s [options] <filename>\n" |
434 | "\n" |
435 | "Valid options:\n" |
436 | " -h : display this usage information\n" |
437 | " -n <name> : specify logo name (default: linux_logo)\n" |
438 | " -o <output> : output to file <output> instead of stdout\n" |
439 | " -t <type> : specify logo type, one of\n" |
440 | " mono : monochrome black/white\n" |
441 | " vga16 : 16 colors VGA text palette\n" |
442 | " clut224 : 224 colors (default)\n" |
443 | " gray256 : 256 levels grayscale\n" |
444 | "\n", programname); |
445 | } |
446 | |
447 | int main(int argc, char *argv[]) |
448 | { |
449 | int opt; |
450 | |
451 | programname = argv[0]; |
452 | |
453 | opterr = 0; |
454 | while (1) { |
455 | opt = getopt(argc, argv, "hn:o:t:"); |
456 | if (opt == -1) |
457 | break; |
458 | |
459 | switch (opt) { |
460 | case 'h': |
461 | usage(); |
462 | break; |
463 | |
464 | case 'n': |
465 | logoname = optarg; |
466 | break; |
467 | |
468 | case 'o': |
469 | outputname = optarg; |
470 | break; |
471 | |
472 | case 't': |
473 | if (!strcmp(optarg, "mono")) |
474 | logo_type = LINUX_LOGO_MONO; |
475 | else if (!strcmp(optarg, "vga16")) |
476 | logo_type = LINUX_LOGO_VGA16; |
477 | else if (!strcmp(optarg, "clut224")) |
478 | logo_type = LINUX_LOGO_CLUT224; |
479 | else if (!strcmp(optarg, "gray256")) |
480 | logo_type = LINUX_LOGO_GRAY256; |
481 | else |
482 | usage(); |
483 | break; |
484 | |
485 | default: |
486 | usage(); |
487 | break; |
488 | } |
489 | } |
490 | if (optind != argc-1) |
491 | usage(); |
492 | |
493 | filename = argv[optind]; |
494 | |
495 | read_image(); |
496 | switch (logo_type) { |
497 | case LINUX_LOGO_MONO: |
498 | write_logo_mono(); |
499 | break; |
500 | |
501 | case LINUX_LOGO_VGA16: |
502 | write_logo_vga16(); |
503 | break; |
504 | |
505 | case LINUX_LOGO_CLUT224: |
506 | write_logo_clut224(); |
507 | break; |
508 | |
509 | case LINUX_LOGO_GRAY256: |
510 | write_logo_gray256(); |
511 | break; |
512 | } |
513 | exit(0); |
514 | } |
515 |
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