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104 lines
1.9 KiB
C
104 lines
1.9 KiB
C
// Copyright 2007,2008 Segher Boessenkool <segher@kernel.crashing.org>
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// Licensed under the terms of the GNU GPL, version 2
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// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#define ERROR(s) do { fprintf(stderr, s "\n"); exit(1); } while (0)
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// basic data types
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typedef unsigned char u8;
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typedef unsigned short u16;
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typedef unsigned int u32;
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void wbe16(u8 *p, u16 x) {
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p[0] = x >> 8;
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p[1] = x;
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}
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void wbe32(u8 *p, u32 x) {
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wbe16(p, x >> 16);
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wbe16(p + 2, x);
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}
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static int read_image(u8 *data, u32 w, u32 h, const char *name) {
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FILE *fp;
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u32 x, y;
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u32 ww, hh;
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fp = fopen(name, "rb");
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if (!fp)
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return -1;
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if (fscanf(fp, "P6 %d %d 255\n", &ww, &hh) != 2)
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ERROR("bad ppm");
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if (ww != w || hh != h)
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ERROR("wrong size ppm");
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for (y = 0; y < h; y++)
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for (x = 0; x < w; x++) {
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u8 pix[3];
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u16 raw;
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u32 x0, x1, y0, y1, off;
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x0 = x & 3;
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x1 = x >> 2;
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y0 = y & 3;
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y1 = y >> 2;
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off = x0 + 4 * y0 + 16 * x1 + 4 * w * y1;
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if (fread(pix, 3, 1, fp) != 1)
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ERROR("read");
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raw = (pix[0] & 0xf8) << 7;
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raw |= (pix[1] & 0xf8) << 2;
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raw |= (pix[2] & 0xf8) >> 3;
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raw |= 0x8000;
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wbe16(data + 2*off, raw);
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}
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fclose(fp);
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return 0;
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}
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int main(int argc, char **argv) {
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FILE *in, *fp;
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u8 header[0x72a0];
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fp = fopen("banner.bin", "wb+");
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if (!fp)
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ERROR("open banner.bin");
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memset(header, 0, sizeof header);
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memcpy(header, "WIBN", 4);
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header[9] = 2; // wtf
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in = fopen("title", "rb");
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if (!in)
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ERROR("open title");
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if (fread(header + 0x20, 0x80, 1, in) != 1)
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ERROR("read title");
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fclose(in);
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if(read_image(header + 0xa0, 192, 64, "banner.ppm"))
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ERROR("open banner.ppm");
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if(read_image(header + 0x60a0, 48, 48, "icon.ppm"))
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ERROR("open icon.ppm");
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if (fwrite(header, 0x72a0, 1, fp) != 1)
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ERROR("write header");
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fclose(fp);
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return 0;
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}
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