Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/scripts/pnmtologo.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 11935 byte(s)
Tag kernel26-2.6.12-alx-r9
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 | |
78 | static void die(const char *fmt, ...) |
79 | __attribute__ ((noreturn)) __attribute ((format (printf, 1, 2))); |
80 | static void usage(void) __attribute ((noreturn)); |
81 | |
82 | |
83 | static unsigned int get_number(FILE *fp) |
84 | { |
85 | int c, val; |
86 | |
87 | /* Skip leading whitespace */ |
88 | do { |
89 | c = fgetc(fp); |
90 | if (c == EOF) |
91 | die("%s: end of file\n", filename); |
92 | if (c == '#') { |
93 | /* Ignore comments 'till end of line */ |
94 | do { |
95 | c = fgetc(fp); |
96 | if (c == EOF) |
97 | die("%s: end of file\n", filename); |
98 | } while (c != '\n'); |
99 | } |
100 | } while (isspace(c)); |
101 | |
102 | /* Parse decimal number */ |
103 | val = 0; |
104 | while (isdigit(c)) { |
105 | val = 10*val+c-'0'; |
106 | c = fgetc(fp); |
107 | if (c == EOF) |
108 | die("%s: end of file\n", filename); |
109 | } |
110 | return val; |
111 | } |
112 | |
113 | static unsigned int get_number255(FILE *fp, unsigned int maxval) |
114 | { |
115 | unsigned int val = get_number(fp); |
116 | return (255*val+maxval/2)/maxval; |
117 | } |
118 | |
119 | static void read_image(void) |
120 | { |
121 | FILE *fp; |
122 | unsigned int i, j; |
123 | int magic; |
124 | unsigned int maxval; |
125 | |
126 | /* open image file */ |
127 | fp = fopen(filename, "r"); |
128 | if (!fp) |
129 | die("Cannot open file %s: %s\n", filename, strerror(errno)); |
130 | |
131 | /* check file type and read file header */ |
132 | magic = fgetc(fp); |
133 | if (magic != 'P') |
134 | die("%s is not a PNM file\n", filename); |
135 | magic = fgetc(fp); |
136 | switch (magic) { |
137 | case '1': |
138 | case '2': |
139 | case '3': |
140 | /* Plain PBM/PGM/PPM */ |
141 | break; |
142 | |
143 | case '4': |
144 | case '5': |
145 | case '6': |
146 | /* Binary PBM/PGM/PPM */ |
147 | die("%s: Binary PNM is not supported\n" |
148 | "Use pnmnoraw(1) to convert it to ASCII PNM\n", filename); |
149 | |
150 | default: |
151 | die("%s is not a PNM file\n", filename); |
152 | } |
153 | logo_width = get_number(fp); |
154 | logo_height = get_number(fp); |
155 | |
156 | /* allocate image data */ |
157 | logo_data = (struct color **)malloc(logo_height*sizeof(struct color *)); |
158 | if (!logo_data) |
159 | die("%s\n", strerror(errno)); |
160 | for (i = 0; i < logo_height; i++) { |
161 | logo_data[i] = malloc(logo_width*sizeof(struct color)); |
162 | if (!logo_data[i]) |
163 | die("%s\n", strerror(errno)); |
164 | } |
165 | |
166 | /* read image data */ |
167 | switch (magic) { |
168 | case '1': |
169 | /* Plain PBM */ |
170 | for (i = 0; i < logo_height; i++) |
171 | for (j = 0; j < logo_width; j++) |
172 | logo_data[i][j].red = logo_data[i][j].green = |
173 | logo_data[i][j].blue = 255*(1-get_number(fp)); |
174 | break; |
175 | |
176 | case '2': |
177 | /* Plain PGM */ |
178 | maxval = get_number(fp); |
179 | for (i = 0; i < logo_height; i++) |
180 | for (j = 0; j < logo_width; j++) |
181 | logo_data[i][j].red = logo_data[i][j].green = |
182 | logo_data[i][j].blue = get_number255(fp, maxval); |
183 | break; |
184 | |
185 | case '3': |
186 | /* Plain PPM */ |
187 | maxval = get_number(fp); |
188 | for (i = 0; i < logo_height; i++) |
189 | for (j = 0; j < logo_width; j++) { |
190 | logo_data[i][j].red = get_number255(fp, maxval); |
191 | logo_data[i][j].green = get_number255(fp, maxval); |
192 | logo_data[i][j].blue = get_number255(fp, maxval); |
193 | } |
194 | break; |
195 | } |
196 | |
197 | /* close file */ |
198 | fclose(fp); |
199 | } |
200 | |
201 | static inline int is_black(struct color c) |
202 | { |
203 | return c.red == 0 && c.green == 0 && c.blue == 0; |
204 | } |
205 | |
206 | static inline int is_white(struct color c) |
207 | { |
208 | return c.red == 255 && c.green == 255 && c.blue == 255; |
209 | } |
210 | |
211 | static inline int is_gray(struct color c) |
212 | { |
213 | return c.red == c.green && c.red == c.blue; |
214 | } |
215 | |
216 | static inline int is_equal(struct color c1, struct color c2) |
217 | { |
218 | return c1.red == c2.red && c1.green == c2.green && c1.blue == c2.blue; |
219 | } |
220 | |
221 | static void write_header(void) |
222 | { |
223 | /* open logo file */ |
224 | if (outputname) { |
225 | out = fopen(outputname, "w"); |
226 | if (!out) |
227 | die("Cannot create file %s: %s\n", outputname, strerror(errno)); |
228 | } else { |
229 | out = stdout; |
230 | } |
231 | |
232 | fputs("/*\n", out); |
233 | fputs(" * DO NOT EDIT THIS FILE!\n", out); |
234 | fputs(" *\n", out); |
235 | fprintf(out, " * It was automatically generated from %s\n", filename); |
236 | fputs(" *\n", out); |
237 | fprintf(out, " * Linux logo %s\n", logoname); |
238 | fputs(" */\n\n", out); |
239 | fputs("#include <linux/linux_logo.h>\n\n", out); |
240 | fprintf(out, "static unsigned char %s_data[] __initdata = {\n", |
241 | logoname); |
242 | } |
243 | |
244 | static void write_footer(void) |
245 | { |
246 | fputs("\n};\n\n", out); |
247 | fprintf(out, "struct linux_logo %s __initdata = {\n", logoname); |
248 | fprintf(out, " .type\t= %s,\n", logo_types[logo_type]); |
249 | fprintf(out, " .width\t= %d,\n", logo_width); |
250 | fprintf(out, " .height\t= %d,\n", logo_height); |
251 | if (logo_type == LINUX_LOGO_CLUT224) { |
252 | fprintf(out, " .clutsize\t= %d,\n", logo_clutsize); |
253 | fprintf(out, " .clut\t= %s_clut,\n", logoname); |
254 | } |
255 | fprintf(out, " .data\t= %s_data\n", logoname); |
256 | fputs("};\n\n", out); |
257 | |
258 | /* close logo file */ |
259 | if (outputname) |
260 | fclose(out); |
261 | } |
262 | |
263 | static int write_hex_cnt; |
264 | |
265 | static void write_hex(unsigned char byte) |
266 | { |
267 | if (write_hex_cnt % 12) |
268 | fprintf(out, ", 0x%02x", byte); |
269 | else if (write_hex_cnt) |
270 | fprintf(out, ",\n\t0x%02x", byte); |
271 | else |
272 | fprintf(out, "\t0x%02x", byte); |
273 | write_hex_cnt++; |
274 | } |
275 | |
276 | static void write_logo_mono(void) |
277 | { |
278 | unsigned int i, j; |
279 | unsigned char val, bit; |
280 | |
281 | /* validate image */ |
282 | for (i = 0; i < logo_height; i++) |
283 | for (j = 0; j < logo_width; j++) |
284 | if (!is_black(logo_data[i][j]) && !is_white(logo_data[i][j])) |
285 | die("Image must be monochrome\n"); |
286 | |
287 | /* write file header */ |
288 | write_header(); |
289 | |
290 | /* write logo data */ |
291 | for (i = 0; i < logo_height; i++) { |
292 | for (j = 0; j < logo_width;) { |
293 | for (val = 0, bit = 0x80; bit && j < logo_width; j++, bit >>= 1) |
294 | if (logo_data[i][j].red) |
295 | val |= bit; |
296 | write_hex(val); |
297 | } |
298 | } |
299 | |
300 | /* write logo structure and file footer */ |
301 | write_footer(); |
302 | } |
303 | |
304 | static void write_logo_vga16(void) |
305 | { |
306 | unsigned int i, j, k; |
307 | unsigned char val; |
308 | |
309 | /* validate image */ |
310 | for (i = 0; i < logo_height; i++) |
311 | for (j = 0; j < logo_width; j++) { |
312 | for (k = 0; k < 16; k++) |
313 | if (is_equal(logo_data[i][j], clut_vga16[k])) |
314 | break; |
315 | if (k == 16) |
316 | die("Image must use the 16 console colors only\n" |
317 | "Use ppmquant(1) -map clut_vga16.ppm to reduce the number " |
318 | "of colors\n"); |
319 | } |
320 | |
321 | /* write file header */ |
322 | write_header(); |
323 | |
324 | /* write logo data */ |
325 | for (i = 0; i < logo_height; i++) |
326 | for (j = 0; j < logo_width; j++) { |
327 | for (k = 0; k < 16; k++) |
328 | if (is_equal(logo_data[i][j], clut_vga16[k])) |
329 | break; |
330 | val = k<<4; |
331 | if (++j < logo_width) { |
332 | for (k = 0; k < 16; k++) |
333 | if (is_equal(logo_data[i][j], clut_vga16[k])) |
334 | break; |
335 | val |= k; |
336 | } |
337 | write_hex(val); |
338 | } |
339 | |
340 | /* write logo structure and file footer */ |
341 | write_footer(); |
342 | } |
343 | |
344 | static void write_logo_clut224(void) |
345 | { |
346 | unsigned int i, j, k; |
347 | |
348 | /* validate image */ |
349 | for (i = 0; i < logo_height; i++) |
350 | for (j = 0; j < logo_width; j++) { |
351 | for (k = 0; k < logo_clutsize; k++) |
352 | if (is_equal(logo_data[i][j], logo_clut[k])) |
353 | break; |
354 | if (k == logo_clutsize) { |
355 | if (logo_clutsize == MAX_LINUX_LOGO_COLORS) |
356 | die("Image has more than %d colors\n" |
357 | "Use ppmquant(1) to reduce the number of colors\n", |
358 | MAX_LINUX_LOGO_COLORS); |
359 | logo_clut[logo_clutsize++] = logo_data[i][j]; |
360 | } |
361 | } |
362 | |
363 | /* write file header */ |
364 | write_header(); |
365 | |
366 | /* write logo data */ |
367 | for (i = 0; i < logo_height; i++) |
368 | for (j = 0; j < logo_width; j++) { |
369 | for (k = 0; k < logo_clutsize; k++) |
370 | if (is_equal(logo_data[i][j], logo_clut[k])) |
371 | break; |
372 | write_hex(k+32); |
373 | } |
374 | fputs("\n};\n\n", out); |
375 | |
376 | /* write logo clut */ |
377 | fprintf(out, "static unsigned char %s_clut[] __initdata = {\n", |
378 | logoname); |
379 | write_hex_cnt = 0; |
380 | for (i = 0; i < logo_clutsize; i++) { |
381 | write_hex(logo_clut[i].red); |
382 | write_hex(logo_clut[i].green); |
383 | write_hex(logo_clut[i].blue); |
384 | } |
385 | |
386 | /* write logo structure and file footer */ |
387 | write_footer(); |
388 | } |
389 | |
390 | static void write_logo_gray256(void) |
391 | { |
392 | unsigned int i, j; |
393 | |
394 | /* validate image */ |
395 | for (i = 0; i < logo_height; i++) |
396 | for (j = 0; j < logo_width; j++) |
397 | if (!is_gray(logo_data[i][j])) |
398 | die("Image must be grayscale\n"); |
399 | |
400 | /* write file header */ |
401 | write_header(); |
402 | |
403 | /* write logo data */ |
404 | for (i = 0; i < logo_height; i++) |
405 | for (j = 0; j < logo_width; j++) |
406 | write_hex(logo_data[i][j].red); |
407 | |
408 | /* write logo structure and file footer */ |
409 | write_footer(); |
410 | } |
411 | |
412 | static void die(const char *fmt, ...) |
413 | { |
414 | va_list ap; |
415 | |
416 | va_start(ap, fmt); |
417 | vfprintf(stderr, fmt, ap); |
418 | va_end(ap); |
419 | |
420 | exit(1); |
421 | } |
422 | |
423 | static void usage(void) |
424 | { |
425 | die("\n" |
426 | "Usage: %s [options] <filename>\n" |
427 | "\n" |
428 | "Valid options:\n" |
429 | " -h : display this usage information\n" |
430 | " -n <name> : specify logo name (default: linux_logo)\n" |
431 | " -o <output> : output to file <output> instead of stdout\n" |
432 | " -t <type> : specify logo type, one of\n" |
433 | " mono : monochrome black/white\n" |
434 | " vga16 : 16 colors VGA text palette\n" |
435 | " clut224 : 224 colors (default)\n" |
436 | " gray256 : 256 levels grayscale\n" |
437 | "\n", programname); |
438 | } |
439 | |
440 | int main(int argc, char *argv[]) |
441 | { |
442 | int opt; |
443 | |
444 | programname = argv[0]; |
445 | |
446 | opterr = 0; |
447 | while (1) { |
448 | opt = getopt(argc, argv, "hn:o:t:"); |
449 | if (opt == -1) |
450 | break; |
451 | |
452 | switch (opt) { |
453 | case 'h': |
454 | usage(); |
455 | break; |
456 | |
457 | case 'n': |
458 | logoname = optarg; |
459 | break; |
460 | |
461 | case 'o': |
462 | outputname = optarg; |
463 | break; |
464 | |
465 | case 't': |
466 | if (!strcmp(optarg, "mono")) |
467 | logo_type = LINUX_LOGO_MONO; |
468 | else if (!strcmp(optarg, "vga16")) |
469 | logo_type = LINUX_LOGO_VGA16; |
470 | else if (!strcmp(optarg, "clut224")) |
471 | logo_type = LINUX_LOGO_CLUT224; |
472 | else if (!strcmp(optarg, "gray256")) |
473 | logo_type = LINUX_LOGO_GRAY256; |
474 | else |
475 | usage(); |
476 | break; |
477 | |
478 | default: |
479 | usage(); |
480 | break; |
481 | } |
482 | } |
483 | if (optind != argc-1) |
484 | usage(); |
485 | |
486 | filename = argv[optind]; |
487 | |
488 | read_image(); |
489 | switch (logo_type) { |
490 | case LINUX_LOGO_MONO: |
491 | write_logo_mono(); |
492 | break; |
493 | |
494 | case LINUX_LOGO_VGA16: |
495 | write_logo_vga16(); |
496 | break; |
497 | |
498 | case LINUX_LOGO_CLUT224: |
499 | write_logo_clut224(); |
500 | break; |
501 | |
502 | case LINUX_LOGO_GRAY256: |
503 | write_logo_gray256(); |
504 | break; |
505 | } |
506 | exit(0); |
507 | } |
508 |