ref: d2be4787c6e78df1a0fec1f6fdc75a616ecc1e1e
dir: /sys/src/libdraw/debug.c/
#include <u.h>
#include <libc.h>
#include <draw.h>
void
drawsetdebug(int v)
{
uchar *a;
a = bufimage(display, 1+1);
if(a == nil){
fprint(2, "drawsetdebug: %r\n");
return;
}
a[0] = 'D';
a[1] = v;
}