| rsc | 76193d7 | 2003-09-30 17:47:42 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <draw.h> |
| 4 | |
| 5 | /* |
| 6 | * This code (and the devdraw interface) will have to change |
| 7 | * if we ever get bitmaps with ldepth > 3, because the |
| 8 | * colormap will have to be written in chunks |
| 9 | */ |
| 10 | |
| 11 | void |
| 12 | writecolmap(Display *d, RGB *m) |
| 13 | { |
| 14 | int i, n, fd; |
| 15 | char buf[64], *t; |
| 16 | ulong r, g, b; |
| 17 | |
| 18 | sprint(buf, "/dev/draw/%d/colormap", d->dirno); |
| 19 | fd = open(buf, OWRITE); |
| 20 | if(fd < 0) |
| 21 | drawerror(d, "wrcolmap: open colormap failed"); |
| 22 | t = malloc(8192); |
| 23 | n = 0; |
| 24 | for(i = 0; i < 256; i++) { |
| 25 | r = m[i].red>>24; |
| 26 | g = m[i].green>>24; |
| 27 | b = m[i].blue>>24; |
| 28 | n += sprint(t+n, "%d %lud %lud %lud\n", 255-i, r, g, b); |
| 29 | } |
| 30 | i = write(fd, t, n); |
| 31 | free(t); |
| 32 | close(fd); |
| 33 | if(i != n) |
| 34 | drawerror(d, "wrcolmap: bad write"); |
| 35 | } |
