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
= 0;
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)
125 /* open image file */
126 fp
= fopen(filename
, "r");
128 die("Cannot open file %s: %s\n", filename
, strerror(errno
));
130 /* check file type and read file header */
133 die("%s is not a PNM file\n", filename
);
139 /* Plain PBM/PGM/PPM */
145 /* Binary PBM/PGM/PPM */
146 die("%s: Binary PNM is not supported\n"
147 "Use pnmnoraw(1) to convert it to ASCII PNM\n", filename
);
150 die("%s is not a PNM file\n", filename
);
152 logo_width
= get_number(fp
);
153 logo_height
= get_number(fp
);
155 /* allocate image data */
156 logo_data
= (struct color
**)malloc(logo_height
*sizeof(struct color
*));
158 die("%s\n", strerror(errno
));
159 for (i
= 0; i
< logo_height
; i
++) {
160 logo_data
[i
] = malloc(logo_width
*sizeof(struct color
));
162 die("%s\n", strerror(errno
));
165 /* read image data */
169 for (i
= 0; i
< logo_height
; i
++)
170 for (j
= 0; j
< logo_width
; j
++)
171 logo_data
[i
][j
].red
= logo_data
[i
][j
].green
=
172 logo_data
[i
][j
].blue
= 255*(1-get_number(fp
));
177 maxval
= get_number(fp
);
178 for (i
= 0; i
< logo_height
; i
++)
179 for (j
= 0; j
< logo_width
; j
++)
180 logo_data
[i
][j
].red
= logo_data
[i
][j
].green
=
181 logo_data
[i
][j
].blue
= get_number255(fp
, maxval
);
186 maxval
= get_number(fp
);
187 for (i
= 0; i
< logo_height
; i
++)
188 for (j
= 0; j
< logo_width
; j
++) {
189 logo_data
[i
][j
].red
= get_number255(fp
, maxval
);
190 logo_data
[i
][j
].green
= get_number255(fp
, maxval
);
191 logo_data
[i
][j
].blue
= get_number255(fp
, maxval
);
200 static inline int is_black(struct color c
)
202 return c
.red
== 0 && c
.green
== 0 && c
.blue
== 0;
205 static inline int is_white(struct color c
)
207 return c
.red
== 255 && c
.green
== 255 && c
.blue
== 255;
210 static inline int is_gray(struct color c
)
212 return c
.red
== c
.green
&& c
.red
== c
.blue
;
215 static inline int is_equal(struct color c1
, struct color c2
)
217 return c1
.red
== c2
.red
&& c1
.green
== c2
.green
&& c1
.blue
== c2
.blue
;
220 static void write_header(void)
224 out
= fopen(outputname
, "w");
226 die("Cannot create file %s: %s\n", outputname
, strerror(errno
));
232 fputs(" * DO NOT EDIT THIS FILE!\n", out
);
234 fprintf(out
, " * It was automatically generated from %s\n", filename
);
236 fprintf(out
, " * Linux logo %s\n", logoname
);
237 fputs(" */\n\n", out
);
238 fputs("#include <linux/linux_logo.h>\n\n", out
);
239 fprintf(out
, "static const unsigned char %s_data[] __initdata = {\n",
243 static void write_footer(void)
245 fputs("\n};\n\n", out
);
246 fprintf(out
, "const struct linux_logo %s __initdata = {\n", logoname
);
247 fprintf(out
, " .type\t= %s,\n", logo_types
[logo_type
]);
248 fprintf(out
, " .width\t= %d,\n", logo_width
);
249 fprintf(out
, " .height\t= %d,\n", logo_height
);
250 if (logo_type
== LINUX_LOGO_CLUT224
) {
251 fprintf(out
, " .clutsize\t= %d,\n", logo_clutsize
);
252 fprintf(out
, " .clut\t= %s_clut,\n", logoname
);
254 fprintf(out
, " .data\t= %s_data\n", logoname
);
255 fputs("};\n\n", out
);
257 /* close logo file */
262 static int write_hex_cnt
= 0;
264 static void write_hex(unsigned char byte
)
266 if (write_hex_cnt
% 12)
267 fprintf(out
, ", 0x%02x", byte
);
268 else if (write_hex_cnt
)
269 fprintf(out
, ",\n\t0x%02x", byte
);
271 fprintf(out
, "\t0x%02x", byte
);
275 static void write_logo_mono(void)
278 unsigned char val
, bit
;
281 for (i
= 0; i
< logo_height
; i
++)
282 for (j
= 0; j
< logo_width
; j
++)
283 if (!is_black(logo_data
[i
][j
]) && !is_white(logo_data
[i
][j
]))
284 die("Image must be monochrome\n");
286 /* write file header */
289 /* write logo data */
290 for (i
= 0; i
< logo_height
; i
++) {
291 for (j
= 0; j
< logo_width
;) {
292 for (val
= 0, bit
= 0x80; bit
&& j
< logo_width
; j
++, bit
>>= 1)
293 if (logo_data
[i
][j
].red
)
299 /* write logo structure and file footer */
303 static void write_logo_vga16(void)
309 for (i
= 0; i
< logo_height
; i
++)
310 for (j
= 0; j
< logo_width
; j
++) {
311 for (k
= 0; k
< 16; k
++)
312 if (is_equal(logo_data
[i
][j
], clut_vga16
[k
]))
315 die("Image must use the 16 console colors only\n"
316 "Use ppmquant(1) -map clut_vga16.ppm to reduce the number "
320 /* write file header */
323 /* write logo data */
324 for (i
= 0; i
< logo_height
; i
++)
325 for (j
= 0; j
< logo_width
; j
++) {
326 for (k
= 0; k
< 16; k
++)
327 if (is_equal(logo_data
[i
][j
], clut_vga16
[k
]))
330 if (++j
< logo_width
) {
331 for (k
= 0; k
< 16; k
++)
332 if (is_equal(logo_data
[i
][j
], clut_vga16
[k
]))
339 /* write logo structure and file footer */
343 static void write_logo_clut224(void)
348 for (i
= 0; i
< logo_height
; i
++)
349 for (j
= 0; j
< logo_width
; j
++) {
350 for (k
= 0; k
< logo_clutsize
; k
++)
351 if (is_equal(logo_data
[i
][j
], logo_clut
[k
]))
353 if (k
== logo_clutsize
) {
354 if (logo_clutsize
== MAX_LINUX_LOGO_COLORS
)
355 die("Image has more than %d colors\n"
356 "Use ppmquant(1) to reduce the number of colors\n",
357 MAX_LINUX_LOGO_COLORS
);
358 logo_clut
[logo_clutsize
++] = logo_data
[i
][j
];
362 /* write file header */
365 /* write logo data */
366 for (i
= 0; i
< logo_height
; i
++)
367 for (j
= 0; j
< logo_width
; j
++) {
368 for (k
= 0; k
< logo_clutsize
; k
++)
369 if (is_equal(logo_data
[i
][j
], logo_clut
[k
]))
373 fputs("\n};\n\n", out
);
375 /* write logo clut */
376 fprintf(out
, "static const unsigned char %s_clut[] __initdata = {\n",
379 for (i
= 0; i
< logo_clutsize
; i
++) {
380 write_hex(logo_clut
[i
].red
);
381 write_hex(logo_clut
[i
].green
);
382 write_hex(logo_clut
[i
].blue
);
385 /* write logo structure and file footer */
389 static void write_logo_gray256(void)
394 for (i
= 0; i
< logo_height
; i
++)
395 for (j
= 0; j
< logo_width
; j
++)
396 if (!is_gray(logo_data
[i
][j
]))
397 die("Image must be grayscale\n");
399 /* write file header */
402 /* write logo data */
403 for (i
= 0; i
< logo_height
; i
++)
404 for (j
= 0; j
< logo_width
; j
++)
405 write_hex(logo_data
[i
][j
].red
);
407 /* write logo structure and file footer */
411 static void die(const char *fmt
, ...)
416 vfprintf(stderr
, fmt
, ap
);
422 static void usage(void)
425 "Usage: %s [options] <filename>\n"
428 " -h : display this usage information\n"
429 " -n <name> : specify logo name (default: linux_logo)\n"
430 " -o <output> : output to file <output> instead of stdout\n"
431 " -t <type> : specify logo type, one of\n"
432 " mono : monochrome black/white\n"
433 " vga16 : 16 colors VGA text palette\n"
434 " clut224 : 224 colors (default)\n"
435 " gray256 : 256 levels grayscale\n"
439 int main(int argc
, char *argv
[])
443 programname
= argv
[0];
447 opt
= getopt(argc
, argv
, "hn:o:t:");
465 if (!strcmp(optarg
, "mono"))
466 logo_type
= LINUX_LOGO_MONO
;
467 else if (!strcmp(optarg
, "vga16"))
468 logo_type
= LINUX_LOGO_VGA16
;
469 else if (!strcmp(optarg
, "clut224"))
470 logo_type
= LINUX_LOGO_CLUT224
;
471 else if (!strcmp(optarg
, "gray256"))
472 logo_type
= LINUX_LOGO_GRAY256
;
482 if (optind
!= argc
-1)
485 filename
= argv
[optind
];
489 case LINUX_LOGO_MONO
:
493 case LINUX_LOGO_VGA16
:
497 case LINUX_LOGO_CLUT224
:
498 write_logo_clut224();
501 case LINUX_LOGO_GRAY256
:
502 write_logo_gray256();