| #include <u.h> | |
| #include <libc.h> | |
| #include <draw.h> | |
| /* | |
| * This code (and the devdraw interface) will have to change | |
| * if we ever get bitmaps with ldepth > 3, because the | |
| * colormap will have to be written in chunks | |
| */ | |
| void | |
| writecolmap(Display *d, RGB *m) | |
| { | |
| int i, n, fd; | |
| char buf[64], *t; | |
| ulong r, g, b; | |
| sprint(buf, "/dev/draw/%d/colormap", d->dirno); | |
| fd = open(buf, OWRITE); | |
| if(fd < 0) | |
| drawerror(d, "wrcolmap: open colormap failed"); | |
| t = malloc(8192); | |
| n = 0; | |
| for(i = 0; i < 256; i++) { | |
| r = m[i].red>>24; | |
| g = m[i].green>>24; | |
| b = m[i].blue>>24; | |
| n += sprint(t+n, "%d %lud %lud %lud\n", 255-i, r, g, b); | |
| } | |
| i = write(fd, t, n); | |
| free(t); | |
| close(fd); | |
| if(i != n) | |
| drawerror(d, "wrcolmap: bad write"); | |
| } |