3 * Convert a logo in ASCII PNM format to C source suitable for inclusion in
6 * (C) Copyright 2001-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
8 * --------------------------------------------------------------------------
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.
24 static const char *programname;
25 static const char *filename;
26 static const char *logoname = "linux_logo";
27 static const char *outputname;
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 */
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"
43 #define MAX_LINUX_LOGO_COLORS 224
51 static const struct color clut_vga16[16] = {
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;
78 static void die(const char *fmt, ...)
79 __attribute__ ((noreturn)) __attribute ((format (printf, 1, 2)));
80 static void usage(void) __attribute ((noreturn));
83 static unsigned int get_number(FILE *fp)
87 /* Skip leading whitespace */
91 die("%s: end of file\n", filename);
93 /* Ignore comments 'till end of line */
97 die("%s: end of file\n", filename);
100 } while (isspace(c));
102 /* Parse decimal number */
108 die("%s: end of file\n", filename);
113 static unsigned int get_number255(FILE *fp, unsigned int maxval)
115 unsigned int val = get_number(fp);
116 return (255*val+maxval/2)/maxval;
119 static void read_image(void)
126 /* open image file */
127 fp = fopen(filename, "r");
129 die("Cannot open file %s: %s\n", filename, strerror(errno));
131 /* check file type and read file header */
134 die("%s is not a PNM file\n", filename);
140 /* Plain PBM/PGM/PPM */
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);
151 die("%s is not a PNM file\n", filename);
153 logo_width = get_number(fp);
154 logo_height = get_number(fp);
156 /* allocate image data */
157 logo_data = (struct color **)malloc(logo_height*sizeof(struct color *));
159 die("%s\n", strerror(errno));
160 for (i = 0; i < logo_height; i++) {
161 logo_data[i] = malloc(logo_width*sizeof(struct color));
163 die("%s\n", strerror(errno));
166 /* read image data */
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));
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);
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);
201 static inline int is_black(struct color c)
203 return c.red == 0 && c.green == 0 && c.blue == 0;
206 static inline int is_white(struct color c)
208 return c.red == 255 && c.green == 255 && c.blue == 255;
211 static inline int is_gray(struct color c)
213 return c.red == c.green && c.red == c.blue;
216 static inline int is_equal(struct color c1, struct color c2)
218 return c1.red == c2.red && c1.green == c2.green && c1.blue == c2.blue;
221 static void write_header(void)
225 out = fopen(outputname, "w");
227 die("Cannot create file %s: %s\n", outputname, strerror(errno));
233 fputs(" * DO NOT EDIT THIS FILE!\n", out);
235 fprintf(out, " * It was automatically generated from %s\n", filename);
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",
244 static void write_footer(void)
246 fputs("\n};\n\n", out);
247 fprintf(out, "const struct linux_logo %s __initconst = {\n", logoname);
248 fprintf(out, "\t.type\t\t= %s,\n", logo_types[logo_type]);
249 fprintf(out, "\t.width\t\t= %d,\n", logo_width);
250 fprintf(out, "\t.height\t\t= %d,\n", logo_height);
251 if (logo_type == LINUX_LOGO_CLUT224) {
252 fprintf(out, "\t.clutsize\t= %d,\n", logo_clutsize);
253 fprintf(out, "\t.clut\t\t= %s_clut,\n", logoname);
255 fprintf(out, "\t.data\t\t= %s_data\n", logoname);
256 fputs("};\n\n", out);
258 /* close logo file */
263 static int write_hex_cnt;
265 static void write_hex(unsigned char byte)
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);
272 fprintf(out, "\t0x%02x", byte);
276 static void write_logo_mono(void)
279 unsigned char val, bit;
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");
287 /* write file header */
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)
300 /* write logo structure and file footer */
304 static void write_logo_vga16(void)
306 unsigned int i, j, k;
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]))
316 die("Image must use the 16 console colors only\n"
317 "Use ppmquant(1) -map clut_vga16.ppm to reduce the number "
321 /* write file header */
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]))
331 if (++j < logo_width) {
332 for (k = 0; k < 16; k++)
333 if (is_equal(logo_data[i][j], clut_vga16[k]))
340 /* write logo structure and file footer */
344 static void write_logo_clut224(void)
346 unsigned int i, j, k;
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]))
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];
363 /* write file header */
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]))
374 fputs("\n};\n\n", out);
376 /* write logo clut */
377 fprintf(out, "static unsigned char %s_clut[] __initdata = {\n",
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);
386 /* write logo structure and file footer */
390 static void write_logo_gray256(void)
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");
400 /* write file header */
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);
408 /* write logo structure and file footer */
412 static void die(const char *fmt, ...)
417 vfprintf(stderr, fmt, ap);
423 static void usage(void)
426 "Usage: %s [options] <filename>\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"
440 int main(int argc, char *argv[])
444 programname = argv[0];
448 opt = getopt(argc, argv, "hn:o: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;
483 if (optind != argc-1)
486 filename = argv[optind];
490 case LINUX_LOGO_MONO:
494 case LINUX_LOGO_VGA16:
498 case LINUX_LOGO_CLUT224:
499 write_logo_clut224();
502 case LINUX_LOGO_GRAY256:
503 write_logo_gray256();