#include #include #include void drawsetdebug(int v) { uchar *a; _lockdisplay(display); a = bufimage(display, 1+1); if(a == nil){ _unlockdisplay(display); fprint(2, "drawsetdebug: %r\n"); return; } a[0] = 'D'; a[1] = v; _unlockdisplay(display); }