1 ed7c8e8d 2003-09-30 devnull #include <u.h>
 2 ed7c8e8d 2003-09-30 devnull #include <libc.h>
 3 ed7c8e8d 2003-09-30 devnull #include <draw.h>
 4 ed7c8e8d 2003-09-30 devnull 
 5 ed7c8e8d 2003-09-30 devnull static
 6 ed7c8e8d 2003-09-30 devnull uchar*
 7 ed7c8e8d 2003-09-30 devnull addcoord(uchar *p, int oldx, int newx)
 8 ed7c8e8d 2003-09-30 devnull {
 9 ed7c8e8d 2003-09-30 devnull 	int dx;
10 ed7c8e8d 2003-09-30 devnull 
11 ed7c8e8d 2003-09-30 devnull 	dx = newx-oldx;
12 ed7c8e8d 2003-09-30 devnull 	/* does dx fit in 7 signed bits? */
13 ed7c8e8d 2003-09-30 devnull 	if((unsigned)(dx - -0x40) <= 0x7F)
14 ed7c8e8d 2003-09-30 devnull 		*p++ = dx&0x7F;
15 ed7c8e8d 2003-09-30 devnull 	else{
16 ed7c8e8d 2003-09-30 devnull 		*p++ = 0x80 | (newx&0x7F);
17 ed7c8e8d 2003-09-30 devnull 		*p++ = newx>>7;
18 ed7c8e8d 2003-09-30 devnull 		*p++ = newx>>15;
19 ed7c8e8d 2003-09-30 devnull 	}
20 ed7c8e8d 2003-09-30 devnull 	return p;
21 ed7c8e8d 2003-09-30 devnull }
22 ed7c8e8d 2003-09-30 devnull 
23 ed7c8e8d 2003-09-30 devnull static
24 ed7c8e8d 2003-09-30 devnull void
25 ed7c8e8d 2003-09-30 devnull dopoly(int cmd, Image *dst, Point *pp, int np, int end0, int end1, int radius, Image *src, Point *sp, Drawop op)
26 ed7c8e8d 2003-09-30 devnull {
27 ed7c8e8d 2003-09-30 devnull 	uchar *a, *t, *u;
28 ed7c8e8d 2003-09-30 devnull 	int i, ox, oy;
29 ed7c8e8d 2003-09-30 devnull 
30 ed7c8e8d 2003-09-30 devnull 	if(np == 0)
31 ed7c8e8d 2003-09-30 devnull 		return;
32 ed7c8e8d 2003-09-30 devnull 	t = malloc(np*2*3);
33 ed7c8e8d 2003-09-30 devnull 	if(t == nil)
34 ed7c8e8d 2003-09-30 devnull 		return;
35 ed7c8e8d 2003-09-30 devnull 	u = t;
36 ed7c8e8d 2003-09-30 devnull 	ox = oy = 0;
37 ed7c8e8d 2003-09-30 devnull 	for(i=0; i<np; i++){
38 ed7c8e8d 2003-09-30 devnull 		u = addcoord(u, ox, pp[i].x);
39 ed7c8e8d 2003-09-30 devnull 		ox = pp[i].x;
40 ed7c8e8d 2003-09-30 devnull 		u = addcoord(u, oy, pp[i].y);
41 ed7c8e8d 2003-09-30 devnull 		oy = pp[i].y;
42 ed7c8e8d 2003-09-30 devnull 	}
43 ed7c8e8d 2003-09-30 devnull 
44 ed7c8e8d 2003-09-30 devnull 	_setdrawop(dst->display, op);
45 ed7c8e8d 2003-09-30 devnull 
46 ed7c8e8d 2003-09-30 devnull 	a = bufimage(dst->display, 1+4+2+4+4+4+4+2*4+(u-t));
47 ed7c8e8d 2003-09-30 devnull 	if(a == 0){
48 ed7c8e8d 2003-09-30 devnull 		free(t);
49 ed7c8e8d 2003-09-30 devnull 		fprint(2, "image poly: %r\n");
50 ed7c8e8d 2003-09-30 devnull 		return;
51 ed7c8e8d 2003-09-30 devnull 	}
52 ed7c8e8d 2003-09-30 devnull 	a[0] = cmd;
53 ed7c8e8d 2003-09-30 devnull 	BPLONG(a+1, dst->id);
54 ed7c8e8d 2003-09-30 devnull 	BPSHORT(a+5, np-1);
55 ed7c8e8d 2003-09-30 devnull 	BPLONG(a+7, end0);
56 ed7c8e8d 2003-09-30 devnull 	BPLONG(a+11, end1);
57 ed7c8e8d 2003-09-30 devnull 	BPLONG(a+15, radius);
58 ed7c8e8d 2003-09-30 devnull 	BPLONG(a+19, src->id);
59 ed7c8e8d 2003-09-30 devnull 	BPLONG(a+23, sp->x);
60 ed7c8e8d 2003-09-30 devnull 	BPLONG(a+27, sp->y);
61 ed7c8e8d 2003-09-30 devnull 	memmove(a+31, t, u-t);
62 ed7c8e8d 2003-09-30 devnull 	free(t);
63 ed7c8e8d 2003-09-30 devnull }
64 ed7c8e8d 2003-09-30 devnull 
65 ed7c8e8d 2003-09-30 devnull void
66 ed7c8e8d 2003-09-30 devnull poly(Image *dst, Point *p, int np, int end0, int end1, int radius, Image *src, Point sp)
67 ed7c8e8d 2003-09-30 devnull {
68 ed7c8e8d 2003-09-30 devnull 	dopoly('p', dst, p, np, end0, end1, radius, src, &sp, SoverD);
69 ed7c8e8d 2003-09-30 devnull }
70 ed7c8e8d 2003-09-30 devnull 
71 ed7c8e8d 2003-09-30 devnull void
72 ed7c8e8d 2003-09-30 devnull polyop(Image *dst, Point *p, int np, int end0, int end1, int radius, Image *src, Point sp, Drawop op)
73 ed7c8e8d 2003-09-30 devnull {
74 ed7c8e8d 2003-09-30 devnull 	dopoly('p', dst, p, np, end0, end1, radius, src, &sp, op);
75 ed7c8e8d 2003-09-30 devnull }
76 ed7c8e8d 2003-09-30 devnull 
77 ed7c8e8d 2003-09-30 devnull void
78 ed7c8e8d 2003-09-30 devnull fillpoly(Image *dst, Point *p, int np, int wind, Image *src, Point sp)
79 ed7c8e8d 2003-09-30 devnull {
80 ed7c8e8d 2003-09-30 devnull 	dopoly('P', dst, p, np, wind, 0, 0, src, &sp, SoverD);
81 ed7c8e8d 2003-09-30 devnull }
82 ed7c8e8d 2003-09-30 devnull 
83 ed7c8e8d 2003-09-30 devnull void
84 ed7c8e8d 2003-09-30 devnull fillpolyop(Image *dst, Point *p, int np, int wind, Image *src, Point sp, Drawop op)
85 ed7c8e8d 2003-09-30 devnull {
86 ed7c8e8d 2003-09-30 devnull 	dopoly('P', dst, p, np, wind, 0, 0, src, &sp, op);
87 ed7c8e8d 2003-09-30 devnull }