[linux-2.6-block.git] / drivers / video / logo / pnmtologo.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Convert a logo in ASCII PNM format to C source suitable for inclusion in
 *  the Linux kernel
 *
 *  (C) Copyright 2001-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
 */

#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>


static const char *programname;
static const char *filename;
static const char *logoname = "linux_logo";
static const char *outputname;
static FILE *out;


#define LINUX_LOGO_MONO		1	/* monochrome black/white */
#define LINUX_LOGO_VGA16	2	/* 16 colors VGA text palette */
#define LINUX_LOGO_CLUT224	3	/* 224 colors */
#define LINUX_LOGO_GRAY256	4	/* 256 levels grayscale */

static const char *logo_types[LINUX_LOGO_GRAY256+1] = {
	[LINUX_LOGO_MONO] = "LINUX_LOGO_MONO",
	[LINUX_LOGO_VGA16] = "LINUX_LOGO_VGA16",
	[LINUX_LOGO_CLUT224] = "LINUX_LOGO_CLUT224",
	[LINUX_LOGO_GRAY256] = "LINUX_LOGO_GRAY256"
};

#define MAX_LINUX_LOGO_COLORS	224

struct color {
	unsigned char red;
	unsigned char green;
	unsigned char blue;
};

static const struct color clut_vga16[16] = {
	{ 0x00, 0x00, 0x00 },
	{ 0x00, 0x00, 0xaa },
	{ 0x00, 0xaa, 0x00 },
	{ 0x00, 0xaa, 0xaa },
	{ 0xaa, 0x00, 0x00 },
	{ 0xaa, 0x00, 0xaa },
	{ 0xaa, 0x55, 0x00 },
	{ 0xaa, 0xaa, 0xaa },
	{ 0x55, 0x55, 0x55 },
	{ 0x55, 0x55, 0xff },
	{ 0x55, 0xff, 0x55 },
	{ 0x55, 0xff, 0xff },
	{ 0xff, 0x55, 0x55 },
	{ 0xff, 0x55, 0xff },
	{ 0xff, 0xff, 0x55 },
	{ 0xff, 0xff, 0xff },
};


static int logo_type = LINUX_LOGO_CLUT224;
static unsigned int logo_width;
static unsigned int logo_height;
static struct color **logo_data;
static struct color logo_clut[MAX_LINUX_LOGO_COLORS];
static unsigned int logo_clutsize;
static int is_plain_pbm = 0;

static void die(const char *fmt, ...)
__attribute__((noreturn)) __attribute((format (printf, 1, 2)));
static void usage(void) __attribute((noreturn));


static unsigned int get_number(FILE *fp)
{
	int c, val;

	/* Skip leading whitespace */
	do {
		c = fgetc(fp);
		if (c == EOF)
			die("%s: end of file\n", filename);
		if (c == '#') {
			/* Ignore comments 'till end of line */
			do {
				c = fgetc(fp);
				if (c == EOF)
					die("%s: end of file\n", filename);
			} while (c != '\n');
		}
	} while (isspace(c));

	/* Parse decimal number */
	val = 0;
	while (isdigit(c)) {
		val = 10*val+c-'0';
		/* some PBM are 'broken'; GiMP for example exports a PBM without space
		 * between the digits. This is Ok cause we know a PBM can only have a '1'
		 * or a '0' for the digit.
		 */
		if (is_plain_pbm)
			break;
		c = fgetc(fp);
		if (c == EOF)
			die("%s: end of file\n", filename);
	}
	return val;
}

static unsigned int get_number255(FILE *fp, unsigned int maxval)
{
	unsigned int val = get_number(fp);

	return (255*val+maxval/2)/maxval;
}

static void read_image(void)
{
	FILE *fp;
	unsigned int i, j;
	int magic;
	unsigned int maxval;

	/* open image file */
	fp = fopen(filename, "r");
	if (!fp)
		die("Cannot open file %s: %s\n", filename, strerror(errno));

	/* check file type and read file header */
	magic = fgetc(fp);
	if (magic != 'P')
		die("%s is not a PNM file\n", filename);
	magic = fgetc(fp);
	switch (magic) {
	case '1':
	case '2':
	case '3':
		/* Plain PBM/PGM/PPM */
		break;

	case '4':
	case '5':
	case '6':
		/* Binary PBM/PGM/PPM */
		die("%s: Binary PNM is not supported\n"
		"Use pnmnoraw(1) to convert it to ASCII PNM\n", filename);

	default:
		die("%s is not a PNM file\n", filename);
	}
	logo_width = get_number(fp);
	logo_height = get_number(fp);

	/* allocate image data */
	logo_data = (struct color **)malloc(logo_height*sizeof(struct color *));
	if (!logo_data)
		die("%s\n", strerror(errno));
	for (i = 0; i < logo_height; i++) {
		logo_data[i] = malloc(logo_width*sizeof(struct color));
	if (!logo_data[i])
		die("%s\n", strerror(errno));
	}

	/* read image data */
	switch (magic) {
	case '1':
		/* Plain PBM */
		is_plain_pbm = 1;
		for (i = 0; i < logo_height; i++)
			for (j = 0; j < logo_width; j++)
				logo_data[i][j].red = logo_data[i][j].green =
					logo_data[i][j].blue = 255*(1-get_number(fp));
		break;

	case '2':
		/* Plain PGM */
		maxval = get_number(fp);
		for (i = 0; i < logo_height; i++)
			for (j = 0; j < logo_width; j++)
				logo_data[i][j].red = logo_data[i][j].green =
					logo_data[i][j].blue = get_number255(fp, maxval);
		break;

	case '3':
		/* Plain PPM */
		maxval = get_number(fp);
		for (i = 0; i < logo_height; i++)
			for (j = 0; j < logo_width; j++) {
				logo_data[i][j].red = get_number255(fp, maxval);
				logo_data[i][j].green = get_number255(fp, maxval);
				logo_data[i][j].blue = get_number255(fp, maxval);
			}
		break;
	}

	/* close file */
	fclose(fp);
}

static inline int is_black(struct color c)
{
	return c.red == 0 && c.green == 0 && c.blue == 0;
}

static inline int is_white(struct color c)
{
	return c.red == 255 && c.green == 255 && c.blue == 255;
}

static inline int is_gray(struct color c)
{
	return c.red == c.green && c.red == c.blue;
}

static inline int is_equal(struct color c1, struct color c2)
{
	return c1.red == c2.red && c1.green == c2.green && c1.blue == c2.blue;
}

static void write_header(void)
{
	/* open logo file */
	if (outputname) {
		out = fopen(outputname, "w");
		if (!out)
			die("Cannot create file %s: %s\n", outputname, strerror(errno));
	} else {
		out = stdout;
	}

	fputs("/*\n", out);
	fputs(" *  DO NOT EDIT THIS FILE!\n", out);
	fputs(" *\n", out);
	fprintf(out, " *  Linux logo %s\n", logoname);
	fputs(" */\n\n", out);
	fputs("#include <linux/linux_logo.h>\n\n", out);
	fprintf(out, "static unsigned char %s_data[] __initdata = {\n",
		logoname);
}

static void write_footer(void)
{
	fputs("\n};\n\n", out);
	fprintf(out, "const struct linux_logo %s __initconst = {\n", logoname);
	fprintf(out, "\t.type\t\t= %s,\n", logo_types[logo_type]);
	fprintf(out, "\t.width\t\t= %u,\n", logo_width);
	fprintf(out, "\t.height\t\t= %u,\n", logo_height);
	if (logo_type == LINUX_LOGO_CLUT224) {
		fprintf(out, "\t.clutsize\t= %u,\n", logo_clutsize);
		fprintf(out, "\t.clut\t\t= %s_clut,\n", logoname);
	}
	fprintf(out, "\t.data\t\t= %s_data\n", logoname);
	fputs("};\n\n", out);

	/* close logo file */
	if (outputname)
		fclose(out);
}

static int write_hex_cnt;

static void write_hex(unsigned char byte)
{
	if (write_hex_cnt % 12)
		fprintf(out, ", 0x%02x", byte);
	else if (write_hex_cnt)
		fprintf(out, ",\n\t0x%02x", byte);
	else
		fprintf(out, "\t0x%02x", byte);
	write_hex_cnt++;
}

static void write_logo_mono(void)
{
	unsigned int i, j;
	unsigned char val, bit;

	/* validate image */
	for (i = 0; i < logo_height; i++)
		for (j = 0; j < logo_width; j++)
			if (!is_black(logo_data[i][j]) && !is_white(logo_data[i][j]))
				die("Image must be monochrome\n");

	/* write file header */
	write_header();

	/* write logo data */
	for (i = 0; i < logo_height; i++) {
		for (j = 0; j < logo_width;) {
			for (val = 0, bit = 0x80; bit && j < logo_width; j++, bit >>= 1)
				if (logo_data[i][j].red)
					val |= bit;
			write_hex(val);
		}
	}

	/* write logo structure and file footer */
	write_footer();
}

static void write_logo_vga16(void)
{
	unsigned int i, j, k;
	unsigned char val;

	/* validate image */
	for (i = 0; i < logo_height; i++)
		for (j = 0; j < logo_width; j++) {
			for (k = 0; k < 16; k++)
				if (is_equal(logo_data[i][j], clut_vga16[k]))
					break;
			if (k == 16)
				die("Image must use the 16 console colors only\n"
				    "Use ppmquant(1) -map clut_vga16.ppm to reduce the number "
				    "of colors\n");
		}

	/* write file header */
	write_header();

	/* write logo data */
	for (i = 0; i < logo_height; i++)
		for (j = 0; j < logo_width; j++) {
			for (k = 0; k < 16; k++)
				if (is_equal(logo_data[i][j], clut_vga16[k]))
					break;
			val = k<<4;
			if (++j < logo_width) {
				for (k = 0; k < 16; k++)
					if (is_equal(logo_data[i][j], clut_vga16[k]))
						break;
				val |= k;
			}
			write_hex(val);
		}

	/* write logo structure and file footer */
	write_footer();
}

static void write_logo_clut224(void)
{
	unsigned int i, j, k;

	/* validate image */
	for (i = 0; i < logo_height; i++)
		for (j = 0; j < logo_width; j++) {
			for (k = 0; k < logo_clutsize; k++)
				if (is_equal(logo_data[i][j], logo_clut[k]))
					break;
			if (k == logo_clutsize) {
				if (logo_clutsize == MAX_LINUX_LOGO_COLORS)
					die("Image has more than %d colors\n"
					    "Use ppmquant(1) to reduce the number of colors\n",
					    MAX_LINUX_LOGO_COLORS);
				logo_clut[logo_clutsize++] = logo_data[i][j];
			}
		}

	/* write file header */
	write_header();

	/* write logo data */
	for (i = 0; i < logo_height; i++)
		for (j = 0; j < logo_width; j++) {
			for (k = 0; k < logo_clutsize; k++)
				if (is_equal(logo_data[i][j], logo_clut[k]))
					break;
			write_hex(k+32);
		}
	fputs("\n};\n\n", out);

	/* write logo clut */
	fprintf(out, "static unsigned char %s_clut[] __initdata = {\n",
		logoname);
	write_hex_cnt = 0;
	for (i = 0; i < logo_clutsize; i++) {
		write_hex(logo_clut[i].red);
		write_hex(logo_clut[i].green);
		write_hex(logo_clut[i].blue);
	}

	/* write logo structure and file footer */
	write_footer();
}

static void write_logo_gray256(void)
{
	unsigned int i, j;

	/* validate image */
	for (i = 0; i < logo_height; i++)
		for (j = 0; j < logo_width; j++)
			if (!is_gray(logo_data[i][j]))
				die("Image must be grayscale\n");

	/* write file header */
	write_header();

	/* write logo data */
	for (i = 0; i < logo_height; i++)
		for (j = 0; j < logo_width; j++)
			write_hex(logo_data[i][j].red);

	/* write logo structure and file footer */
	write_footer();
}

static void die(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	vfprintf(stderr, fmt, ap);
	va_end(ap);

	exit(1);
}

static void usage(void)
{
	die("\n"
	"Usage: %s [options] <filename>\n"
	"\n"
	"Valid options:\n"
	"	-h		  : display this usage information\n"
	"	-n <name>   : specify logo name (default: linux_logo)\n"
	"	-o <output> : output to file <output> instead of stdout\n"
	"	-t <type>   : specify logo type, one of\n"
	"					  mono	: monochrome black/white\n"
	"					  vga16   : 16 colors VGA text palette\n"
	"					  clut224 : 224 colors (default)\n"
	"					  gray256 : 256 levels grayscale\n"
	"\n", programname);
}

int main(int argc, char *argv[])
{
	int opt;

	programname = argv[0];

	opterr = 0;
	while (1) {
		opt = getopt(argc, argv, "hn:o:t:");
		if (opt == -1)
			break;

		switch (opt) {
		case 'h':
			usage();
			break;

		case 'n':
			logoname = optarg;
			break;

		case 'o':
			outputname = optarg;
			break;

		case 't':
			if (!strcmp(optarg, "mono"))
				logo_type = LINUX_LOGO_MONO;
			else if (!strcmp(optarg, "vga16"))
				logo_type = LINUX_LOGO_VGA16;
			else if (!strcmp(optarg, "clut224"))
				logo_type = LINUX_LOGO_CLUT224;
			else if (!strcmp(optarg, "gray256"))
				logo_type = LINUX_LOGO_GRAY256;
			else
				usage();
			break;

		default:
			usage();
			break;
		}
	}
	if (optind != argc-1)
		usage();

	filename = argv[optind];

	read_image();
	switch (logo_type) {
	case LINUX_LOGO_MONO:
		write_logo_mono();
		break;

	case LINUX_LOGO_VGA16:
		write_logo_vga16();
		break;

	case LINUX_LOGO_CLUT224:
		write_logo_clut224();
		break;

	case LINUX_LOGO_GRAY256:
		write_logo_gray256();
		break;
	}
	exit(0);
}
Commit	Line	Data
8f0e0560	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	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>
1da177e4 LT	7	*/
	8
	9	#include <ctype.h>
	10	#include <errno.h>
	11	#include <stdarg.h>
	12	#include <stdio.h>
	13	#include <stdlib.h>
	14	#include <string.h>
	15	#include <unistd.h>
	16
	17
	18	static const char *programname;
	19	static const char *filename;
	20	static const char *logoname = "linux_logo";
	21	static const char *outputname;
	22	static FILE *out;
	23
	24
	25	#define LINUX_LOGO_MONO 1 /* monochrome black/white */
	26	#define LINUX_LOGO_VGA16 2 /* 16 colors VGA text palette */
	27	#define LINUX_LOGO_CLUT224 3 /* 224 colors */
	28	#define LINUX_LOGO_GRAY256 4 /* 256 levels grayscale */
	29
	30	static const char *logo_types[LINUX_LOGO_GRAY256+1] = {
044b14b5 NR	31	[LINUX_LOGO_MONO] = "LINUX_LOGO_MONO",
	32	[LINUX_LOGO_VGA16] = "LINUX_LOGO_VGA16",
	33	[LINUX_LOGO_CLUT224] = "LINUX_LOGO_CLUT224",
	34	[LINUX_LOGO_GRAY256] = "LINUX_LOGO_GRAY256"
1da177e4 LT	35	};
	36
	37	#define MAX_LINUX_LOGO_COLORS 224
	38
	39	struct color {
044b14b5 NR	40	unsigned char red;
	41	unsigned char green;
	42	unsigned char blue;
1da177e4 LT	43	};
	44
	45	static const struct color clut_vga16[16] = {
044b14b5 NR	46	{ 0x00, 0x00, 0x00 },
	47	{ 0x00, 0x00, 0xaa },
	48	{ 0x00, 0xaa, 0x00 },
	49	{ 0x00, 0xaa, 0xaa },
	50	{ 0xaa, 0x00, 0x00 },
	51	{ 0xaa, 0x00, 0xaa },
	52	{ 0xaa, 0x55, 0x00 },
	53	{ 0xaa, 0xaa, 0xaa },
	54	{ 0x55, 0x55, 0x55 },
	55	{ 0x55, 0x55, 0xff },
	56	{ 0x55, 0xff, 0x55 },
	57	{ 0x55, 0xff, 0xff },
	58	{ 0xff, 0x55, 0x55 },
	59	{ 0xff, 0x55, 0xff },
	60	{ 0xff, 0xff, 0x55 },
	61	{ 0xff, 0xff, 0xff },
1da177e4 LT	62	};
	63
	64
	65	static int logo_type = LINUX_LOGO_CLUT224;
	66	static unsigned int logo_width;
	67	static unsigned int logo_height;
	68	static struct color **logo_data;
	69	static struct color logo_clut[MAX_LINUX_LOGO_COLORS];
	70	static unsigned int logo_clutsize;
fc96b211	71	static int is_plain_pbm = 0;
1da177e4 LT	72
1da177e4 LT	73	static void die(const char *fmt, ...)
044b14b5 NR	74	__attribute__((noreturn)) __attribute((format (printf, 1, 2)));
044b14b5 NR	75	static void usage(void) __attribute((noreturn));
1da177e4 LT	76
	77
	78	static unsigned int get_number(FILE *fp)
	79	{
044b14b5 NR	80	int c, val;
	81
	82	/* Skip leading whitespace */
	83	do {
	84	c = fgetc(fp);
	85	if (c == EOF)
	86	die("%s: end of file\n", filename);
	87	if (c == '#') {
	88	/* Ignore comments 'till end of line */
	89	do {
	90	c = fgetc(fp);
	91	if (c == EOF)
	92	die("%s: end of file\n", filename);
	93	} while (c != '\n');
	94	}
	95	} while (isspace(c));
	96
	97	/* Parse decimal number */
	98	val = 0;
	99	while (isdigit(c)) {
	100	val = 10*val+c-'0';
	101	/* some PBM are 'broken'; GiMP for example exports a PBM without space
	102	* between the digits. This is Ok cause we know a PBM can only have a '1'
	103	* or a '0' for the digit.
	104	*/
	105	if (is_plain_pbm)
	106	break;
1da177e4 LT	107	c = fgetc(fp);
1da177e4 LT	108	if (c == EOF)
044b14b5	109	die("%s: end of file\n", filename);
1da177e4	110	}
044b14b5	111	return val;
1da177e4 LT	112	}
	113
	114	static unsigned int get_number255(FILE *fp, unsigned int maxval)
	115	{
044b14b5 NR	116	unsigned int val = get_number(fp);
	117
	118	return (255*val+maxval/2)/maxval;
1da177e4 LT	119	}
	120
	121	static void read_image(void)
	122	{
044b14b5 NR	123	FILE *fp;
	124	unsigned int i, j;
	125	int magic;
	126	unsigned int maxval;
	127
	128	/* open image file */
	129	fp = fopen(filename, "r");
	130	if (!fp)
	131	die("Cannot open file %s: %s\n", filename, strerror(errno));
	132
	133	/* check file type and read file header */
	134	magic = fgetc(fp);
	135	if (magic != 'P')
	136	die("%s is not a PNM file\n", filename);
	137	magic = fgetc(fp);
	138	switch (magic) {
1da177e4 LT	139	case '1':
	140	case '2':
	141	case '3':
044b14b5 NR	142	/* Plain PBM/PGM/PPM */
044b14b5 NR	143	break;
1da177e4 LT	144
	145	case '4':
	146	case '5':
	147	case '6':
044b14b5 NR	148	/* Binary PBM/PGM/PPM */
044b14b5 NR	149	die("%s: Binary PNM is not supported\n"
1da177e4 LT	150	"Use pnmnoraw(1) to convert it to ASCII PNM\n", filename);
	151
	152	default:
044b14b5 NR	153	die("%s is not a PNM file\n", filename);
	154	}
	155	logo_width = get_number(fp);
	156	logo_height = get_number(fp);
	157
	158	/* allocate image data */
	159	logo_data = (struct color *)malloc(logo_heightsizeof(struct color *));
	160	if (!logo_data)
	161	die("%s\n", strerror(errno));
	162	for (i = 0; i < logo_height; i++) {
	163	logo_data[i] = malloc(logo_width*sizeof(struct color));
1da177e4	164	if (!logo_data[i])
044b14b5 NR	165	die("%s\n", strerror(errno));
044b14b5 NR	166	}
1da177e4	167
044b14b5 NR	168	/* read image data */
044b14b5 NR	169	switch (magic) {
1da177e4	170	case '1':
044b14b5 NR	171	/* Plain PBM */
	172	is_plain_pbm = 1;
	173	for (i = 0; i < logo_height; i++)
	174	for (j = 0; j < logo_width; j++)
	175	logo_data[i][j].red = logo_data[i][j].green =
	176	logo_data[i][j].blue = 255*(1-get_number(fp));
	177	break;
1da177e4 LT	178
1da177e4 LT	179	case '2':
044b14b5 NR	180	/* Plain PGM */
	181	maxval = get_number(fp);
	182	for (i = 0; i < logo_height; i++)
	183	for (j = 0; j < logo_width; j++)
	184	logo_data[i][j].red = logo_data[i][j].green =
	185	logo_data[i][j].blue = get_number255(fp, maxval);
	186	break;
1da177e4 LT	187
1da177e4 LT	188	case '3':
044b14b5 NR	189	/* Plain PPM */
	190	maxval = get_number(fp);
	191	for (i = 0; i < logo_height; i++)
	192	for (j = 0; j < logo_width; j++) {
	193	logo_data[i][j].red = get_number255(fp, maxval);
	194	logo_data[i][j].green = get_number255(fp, maxval);
	195	logo_data[i][j].blue = get_number255(fp, maxval);
	196	}
	197	break;
	198	}
1da177e4	199
044b14b5 NR	200	/* close file */
044b14b5 NR	201	fclose(fp);
1da177e4 LT	202	}
	203
	204	static inline int is_black(struct color c)
	205	{
044b14b5	206	return c.red == 0 && c.green == 0 && c.blue == 0;
1da177e4 LT	207	}
	208
	209	static inline int is_white(struct color c)
	210	{
044b14b5	211	return c.red == 255 && c.green == 255 && c.blue == 255;
1da177e4 LT	212	}
	213
	214	static inline int is_gray(struct color c)
	215	{
044b14b5	216	return c.red == c.green && c.red == c.blue;
1da177e4 LT	217	}
	218
	219	static inline int is_equal(struct color c1, struct color c2)
	220	{
044b14b5	221	return c1.red == c2.red && c1.green == c2.green && c1.blue == c2.blue;
1da177e4 LT	222	}
	223
	224	static void write_header(void)
	225	{
044b14b5 NR	226	/* open logo file */
	227	if (outputname) {
	228	out = fopen(outputname, "w");
	229	if (!out)
	230	die("Cannot create file %s: %s\n", outputname, strerror(errno));
	231	} else {
	232	out = stdout;
	233	}
	234
	235	fputs("/*\n", out);
	236	fputs(" * DO NOT EDIT THIS FILE!\n", out);
	237	fputs(" *\n", out);
044b14b5 NR	238	fprintf(out, " * Linux logo %s\n", logoname);
	239	fputs(" */\n\n", out);
	240	fputs("#include <linux/linux_logo.h>\n\n", out);
	241	fprintf(out, "static unsigned char %s_data[] __initdata = {\n",
	242	logoname);
1da177e4 LT	243	}
	244
	245	static void write_footer(void)
	246	{
044b14b5 NR	247	fputs("\n};\n\n", out);
	248	fprintf(out, "const struct linux_logo %s __initconst = {\n", logoname);
	249	fprintf(out, "\t.type\t\t= %s,\n", logo_types[logo_type]);
29328fb0 CIK	250	fprintf(out, "\t.width\t\t= %u,\n", logo_width);
29328fb0 CIK	251	fprintf(out, "\t.height\t\t= %u,\n", logo_height);
044b14b5	252	if (logo_type == LINUX_LOGO_CLUT224) {
29328fb0	253	fprintf(out, "\t.clutsize\t= %u,\n", logo_clutsize);
044b14b5 NR	254	fprintf(out, "\t.clut\t\t= %s_clut,\n", logoname);
	255	}
	256	fprintf(out, "\t.data\t\t= %s_data\n", logoname);
	257	fputs("};\n\n", out);
	258
	259	/* close logo file */
	260	if (outputname)
	261	fclose(out);
1da177e4 LT	262	}
	263
	264	static int write_hex_cnt;
	265
	266	static void write_hex(unsigned char byte)
	267	{
044b14b5 NR	268	if (write_hex_cnt % 12)
	269	fprintf(out, ", 0x%02x", byte);
	270	else if (write_hex_cnt)
	271	fprintf(out, ",\n\t0x%02x", byte);
	272	else
	273	fprintf(out, "\t0x%02x", byte);
	274	write_hex_cnt++;
1da177e4 LT	275	}
	276
	277	static void write_logo_mono(void)
	278	{
044b14b5 NR	279	unsigned int i, j;
	280	unsigned char val, bit;
	281
	282	/* validate image */
	283	for (i = 0; i < logo_height; i++)
	284	for (j = 0; j < logo_width; j++)
	285	if (!is_black(logo_data[i][j]) && !is_white(logo_data[i][j]))
	286	die("Image must be monochrome\n");
	287
	288	/* write file header */
	289	write_header();
	290
	291	/* write logo data */
	292	for (i = 0; i < logo_height; i++) {
	293	for (j = 0; j < logo_width;) {
	294	for (val = 0, bit = 0x80; bit && j < logo_width; j++, bit >>= 1)
	295	if (logo_data[i][j].red)
	296	val \|= bit;
	297	write_hex(val);
	298	}
1da177e4	299	}
1da177e4	300
044b14b5 NR	301	/* write logo structure and file footer */
044b14b5 NR	302	write_footer();
1da177e4 LT	303	}
	304
	305	static void write_logo_vga16(void)
	306	{
044b14b5 NR	307	unsigned int i, j, k;
044b14b5 NR	308	unsigned char val;
1da177e4	309
044b14b5 NR	310	/* validate image */
	311	for (i = 0; i < logo_height; i++)
	312	for (j = 0; j < logo_width; j++) {
	313	for (k = 0; k < 16; k++)
	314	if (is_equal(logo_data[i][j], clut_vga16[k]))
	315	break;
	316	if (k == 16)
	317	die("Image must use the 16 console colors only\n"
	318	"Use ppmquant(1) -map clut_vga16.ppm to reduce the number "
	319	"of colors\n");
	320	}
	321
	322	/* write file header */
	323	write_header();
1da177e4	324
044b14b5 NR	325	/* write logo data */
	326	for (i = 0; i < logo_height; i++)
	327	for (j = 0; j < logo_width; j++) {
	328	for (k = 0; k < 16; k++)
	329	if (is_equal(logo_data[i][j], clut_vga16[k]))
	330	break;
	331	val = k<<4;
	332	if (++j < logo_width) {
	333	for (k = 0; k < 16; k++)
	334	if (is_equal(logo_data[i][j], clut_vga16[k]))
	335	break;
	336	val \|= k;
	337	}
	338	write_hex(val);
	339	}
	340
	341	/* write logo structure and file footer */
	342	write_footer();
1da177e4 LT	343	}
	344
	345	static void write_logo_clut224(void)
	346	{
044b14b5	347	unsigned int i, j, k;
1da177e4	348
044b14b5 NR	349	/* validate image */
	350	for (i = 0; i < logo_height; i++)
	351	for (j = 0; j < logo_width; j++) {
	352	for (k = 0; k < logo_clutsize; k++)
	353	if (is_equal(logo_data[i][j], logo_clut[k]))
	354	break;
	355	if (k == logo_clutsize) {
	356	if (logo_clutsize == MAX_LINUX_LOGO_COLORS)
	357	die("Image has more than %d colors\n"
	358	"Use ppmquant(1) to reduce the number of colors\n",
	359	MAX_LINUX_LOGO_COLORS);
	360	logo_clut[logo_clutsize++] = logo_data[i][j];
	361	}
	362	}
1da177e4	363
044b14b5 NR	364	/* write file header */
	365	write_header();
	366
	367	/* write logo data */
	368	for (i = 0; i < logo_height; i++)
	369	for (j = 0; j < logo_width; j++) {
	370	for (k = 0; k < logo_clutsize; k++)
	371	if (is_equal(logo_data[i][j], logo_clut[k]))
	372	break;
	373	write_hex(k+32);
	374	}
	375	fputs("\n};\n\n", out);
	376
	377	/* write logo clut */
	378	fprintf(out, "static unsigned char %s_clut[] __initdata = {\n",
	379	logoname);
	380	write_hex_cnt = 0;
	381	for (i = 0; i < logo_clutsize; i++) {
	382	write_hex(logo_clut[i].red);
	383	write_hex(logo_clut[i].green);
	384	write_hex(logo_clut[i].blue);
1da177e4	385	}
044b14b5 NR	386
	387	/* write logo structure and file footer */
	388	write_footer();
1da177e4 LT	389	}
	390
	391	static void write_logo_gray256(void)
	392	{
044b14b5	393	unsigned int i, j;
1da177e4	394
044b14b5 NR	395	/* validate image */
	396	for (i = 0; i < logo_height; i++)
	397	for (j = 0; j < logo_width; j++)
	398	if (!is_gray(logo_data[i][j]))
	399	die("Image must be grayscale\n");
1da177e4	400
044b14b5 NR	401	/* write file header */
044b14b5 NR	402	write_header();
1da177e4	403
044b14b5 NR	404	/* write logo data */
	405	for (i = 0; i < logo_height; i++)
	406	for (j = 0; j < logo_width; j++)
	407	write_hex(logo_data[i][j].red);
1da177e4	408
044b14b5 NR	409	/* write logo structure and file footer */
044b14b5 NR	410	write_footer();
1da177e4 LT	411	}
	412
	413	static void die(const char *fmt, ...)
	414	{
044b14b5	415	va_list ap;
1da177e4	416
044b14b5 NR	417	va_start(ap, fmt);
	418	vfprintf(stderr, fmt, ap);
	419	va_end(ap);
1da177e4	420
044b14b5	421	exit(1);
1da177e4 LT	422	}
	423
	424	static void usage(void)
	425	{
044b14b5	426	die("\n"
1da177e4 LT	427	"Usage: %s [options] <filename>\n"
	428	"\n"
	429	"Valid options:\n"
044b14b5 NR	430	" -h : display this usage information\n"
	431	" -n <name> : specify logo name (default: linux_logo)\n"
	432	" -o <output> : output to file <output> instead of stdout\n"
	433	" -t <type> : specify logo type, one of\n"
	434	" mono : monochrome black/white\n"
	435	" vga16 : 16 colors VGA text palette\n"
	436	" clut224 : 224 colors (default)\n"
	437	" gray256 : 256 levels grayscale\n"
1da177e4 LT	438	"\n", programname);
	439	}
	440
	441	int main(int argc, char *argv[])
	442	{
044b14b5	443	int opt;
1da177e4	444
044b14b5	445	programname = argv[0];
1da177e4	446
044b14b5 NR	447	opterr = 0;
	448	while (1) {
	449	opt = getopt(argc, argv, "hn:o:t:");
	450	if (opt == -1)
	451	break;
1da177e4	452
044b14b5 NR	453	switch (opt) {
	454	case 'h':
	455	usage();
	456	break;
1da177e4	457
044b14b5 NR	458	case 'n':
	459	logoname = optarg;
	460	break;
1da177e4	461
044b14b5 NR	462	case 'o':
	463	outputname = optarg;
	464	break;
1da177e4	465
044b14b5 NR	466	case 't':
	467	if (!strcmp(optarg, "mono"))
	468	logo_type = LINUX_LOGO_MONO;
	469	else if (!strcmp(optarg, "vga16"))
	470	logo_type = LINUX_LOGO_VGA16;
	471	else if (!strcmp(optarg, "clut224"))
	472	logo_type = LINUX_LOGO_CLUT224;
	473	else if (!strcmp(optarg, "gray256"))
	474	logo_type = LINUX_LOGO_GRAY256;
	475	else
	476	usage();
	477	break;
1da177e4	478
044b14b5 NR	479	default:
	480	usage();
	481	break;
	482	}
1da177e4	483	}
044b14b5 NR	484	if (optind != argc-1)
044b14b5 NR	485	usage();
1da177e4	486
044b14b5	487	filename = argv[optind];
1da177e4	488
044b14b5 NR	489	read_image();
044b14b5 NR	490	switch (logo_type) {
1da177e4	491	case LINUX_LOGO_MONO:
044b14b5 NR	492	write_logo_mono();
044b14b5 NR	493	break;
1da177e4 LT	494
1da177e4 LT	495	case LINUX_LOGO_VGA16:
044b14b5 NR	496	write_logo_vga16();
044b14b5 NR	497	break;
1da177e4 LT	498
1da177e4 LT	499	case LINUX_LOGO_CLUT224:
044b14b5 NR	500	write_logo_clut224();
044b14b5 NR	501	break;
1da177e4 LT	502
1da177e4 LT	503	case LINUX_LOGO_GRAY256:
044b14b5 NR	504	write_logo_gray256();
	505	break;
	506	}
	507	exit(0);
1da177e4	508	}