1 files changed, 508 insertions, 0 deletions

diff --git a/scripts/pnmtologo.c b/scripts/pnmtologo.c
new file mode 100644
index 000000000000..6aa2a2483f8d
--- /dev/null
+++ b/scripts/pnmtologo.c
@@ -0,0 +1,508 @@
+
+/*
+ *  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>
+ *
+ *  --------------------------------------------------------------------------
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License. See the file COPYING in the main directory of the Linux
+ *  distribution for more details.
+ */
+
+#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 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';
+        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 */
+            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, " *  It was automatically generated from %s\n", filename);
+    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, "struct linux_logo %s __initdata = {\n", logoname);
+    fprintf(out, "    .type\t= %s,\n", logo_types[logo_type]);
+    fprintf(out, "    .width\t= %d,\n", logo_width);
+    fprintf(out, "    .height\t= %d,\n", logo_height);
+    if (logo_type == LINUX_LOGO_CLUT224) {
+        fprintf(out, "    .clutsize\t= %d,\n", logo_clutsize);
+        fprintf(out, "    .clut\t= %s_clut,\n", logoname);
+    }
+    fprintf(out, "    .data\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);
+}
+