17dd7cddfSDavid du Colombier #include <u.h>
27dd7cddfSDavid du Colombier #include <libc.h>
37dd7cddfSDavid du Colombier #include <draw.h>
47dd7cddfSDavid du Colombier
57dd7cddfSDavid du Colombier /*
67dd7cddfSDavid du Colombier * This code (and the devdraw interface) will have to change
77dd7cddfSDavid du Colombier * if we ever get bitmaps with ldepth > 3, because the
87dd7cddfSDavid du Colombier * colormap will have to be written in chunks
97dd7cddfSDavid du Colombier */
107dd7cddfSDavid du Colombier
117dd7cddfSDavid du Colombier void
writecolmap(Display * d,RGB * m)127dd7cddfSDavid du Colombier writecolmap(Display *d, RGB *m)
137dd7cddfSDavid du Colombier {
147dd7cddfSDavid du Colombier int i, n, fd;
157dd7cddfSDavid du Colombier char buf[64], *t;
167dd7cddfSDavid du Colombier ulong r, g, b;
177dd7cddfSDavid du Colombier
187dd7cddfSDavid du Colombier sprint(buf, "/dev/draw/%d/colormap", d->dirno);
197dd7cddfSDavid du Colombier fd = open(buf, OWRITE);
207dd7cddfSDavid du Colombier if(fd < 0)
21*223a0358SDavid du Colombier drawerror(d, "writecolmap: open colormap failed");
227dd7cddfSDavid du Colombier t = malloc(8192);
23*223a0358SDavid du Colombier if (t == nil)
24*223a0358SDavid du Colombier drawerror(d, "writecolmap: no memory");
257dd7cddfSDavid du Colombier n = 0;
267dd7cddfSDavid du Colombier for(i = 0; i < 256; i++) {
277dd7cddfSDavid du Colombier r = m[i].red>>24;
287dd7cddfSDavid du Colombier g = m[i].green>>24;
297dd7cddfSDavid du Colombier b = m[i].blue>>24;
307dd7cddfSDavid du Colombier n += sprint(t+n, "%d %lud %lud %lud\n", 255-i, r, g, b);
317dd7cddfSDavid du Colombier }
327dd7cddfSDavid du Colombier i = write(fd, t, n);
337dd7cddfSDavid du Colombier free(t);
347dd7cddfSDavid du Colombier close(fd);
357dd7cddfSDavid du Colombier if(i != n)
36*223a0358SDavid du Colombier drawerror(d, "writecolmap: bad write");
377dd7cddfSDavid du Colombier }
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