1 324891a5 2006-06-25 devnull #include <u.h>
2 324891a5 2006-06-25 devnull #include <libc.h>
3 324891a5 2006-06-25 devnull #include <draw.h>
4 324891a5 2006-06-25 devnull #include <memdraw.h>
5 324891a5 2006-06-25 devnull #include <memlayer.h>
7 324891a5 2006-06-25 devnull struct Lline
10 324891a5 2006-06-25 devnull Point p1;
11 324891a5 2006-06-25 devnull Point delta;
12 324891a5 2006-06-25 devnull int end0;
13 324891a5 2006-06-25 devnull int end1;
14 324891a5 2006-06-25 devnull int radius;
15 324891a5 2006-06-25 devnull Point sp;
16 324891a5 2006-06-25 devnull Memlayer *dstlayer;
17 324891a5 2006-06-25 devnull Memimage *src;
21 324891a5 2006-06-25 devnull static void llineop(Memimage*, Rectangle, Rectangle, void*, int);
25 324891a5 2006-06-25 devnull _memline(Memimage *dst, Point p0, Point p1, int end0, int end1, int radius, Memimage *src, Point sp, Rectangle clipr, int op)
27 324891a5 2006-06-25 devnull Rectangle r;
28 324891a5 2006-06-25 devnull struct Lline ll;
30 324891a5 2006-06-25 devnull int srcclipped;
31 324891a5 2006-06-25 devnull Memlayer *dl;
33 324891a5 2006-06-25 devnull if(radius < 0)
35 324891a5 2006-06-25 devnull if(src->layer) /* can't draw line with layered source */
37 324891a5 2006-06-25 devnull srcclipped = 0;
40 324891a5 2006-06-25 devnull dl = dst->layer;
41 324891a5 2006-06-25 devnull if(dl == nil){
42 324891a5 2006-06-25 devnull _memimageline(dst, p0, p1, end0, end1, radius, src, sp, clipr, op);
45 324891a5 2006-06-25 devnull if(!srcclipped){
46 324891a5 2006-06-25 devnull d = subpt(sp, p0);
47 324891a5 2006-06-25 devnull if(rectclip(&clipr, rectsubpt(src->clipr, d)) == 0)
49 324891a5 2006-06-25 devnull if((src->flags&Frepl)==0 && rectclip(&clipr, rectsubpt(src->r, d))==0)
51 324891a5 2006-06-25 devnull srcclipped = 1;
54 324891a5 2006-06-25 devnull /* dst is known to be a layer */
55 324891a5 2006-06-25 devnull p0.x += dl->delta.x;
56 324891a5 2006-06-25 devnull p0.y += dl->delta.y;
57 324891a5 2006-06-25 devnull p1.x += dl->delta.x;
58 324891a5 2006-06-25 devnull p1.y += dl->delta.y;
59 324891a5 2006-06-25 devnull clipr.min.x += dl->delta.x;
60 324891a5 2006-06-25 devnull clipr.min.y += dl->delta.y;
61 324891a5 2006-06-25 devnull clipr.max.x += dl->delta.x;
62 324891a5 2006-06-25 devnull clipr.max.y += dl->delta.y;
63 324891a5 2006-06-25 devnull if(dl->clear){
64 324891a5 2006-06-25 devnull dst = dst->layer->screen->image;
65 324891a5 2006-06-25 devnull goto Top;
68 324891a5 2006-06-25 devnull /* XXX */
69 324891a5 2006-06-25 devnull /* this is not the correct set of tests */
70 324891a5 2006-06-25 devnull /* if(log2[dst->depth] != log2[src->depth] || log2[dst->depth]!=3) */
71 324891a5 2006-06-25 devnull /* return; */
73 324891a5 2006-06-25 devnull /* can't use sutherland-cohen clipping because lines are wide */
74 324891a5 2006-06-25 devnull r = memlinebbox(p0, p1, end0, end1, radius);
76 324891a5 2006-06-25 devnull * r is now a bounding box for the line;
77 324891a5 2006-06-25 devnull * use it as a clipping rectangle for subdivision
79 324891a5 2006-06-25 devnull if(rectclip(&r, clipr) == 0)
81 324891a5 2006-06-25 devnull ll.p0 = p0;
82 324891a5 2006-06-25 devnull ll.p1 = p1;
83 324891a5 2006-06-25 devnull ll.end0 = end0;
84 324891a5 2006-06-25 devnull ll.end1 = end1;
85 324891a5 2006-06-25 devnull ll.sp = sp;
86 324891a5 2006-06-25 devnull ll.dstlayer = dst->layer;
87 324891a5 2006-06-25 devnull ll.src = src;
88 324891a5 2006-06-25 devnull ll.radius = radius;
89 324891a5 2006-06-25 devnull ll.delta = dl->delta;
90 324891a5 2006-06-25 devnull ll.op = op;
91 324891a5 2006-06-25 devnull _memlayerop(llineop, dst, r, r, &ll);
96 324891a5 2006-06-25 devnull llineop(Memimage *dst, Rectangle screenr, Rectangle clipr, void *etc, int insave)
98 324891a5 2006-06-25 devnull struct Lline *ll;
99 324891a5 2006-06-25 devnull Point p0, p1;
101 324891a5 2006-06-25 devnull USED(screenr.min.x);
102 324891a5 2006-06-25 devnull ll = etc;
103 324891a5 2006-06-25 devnull if(insave && ll->dstlayer->save==nil)
105 324891a5 2006-06-25 devnull if(!rectclip(&clipr, screenr))
107 324891a5 2006-06-25 devnull if(insave){
108 324891a5 2006-06-25 devnull p0 = subpt(ll->p0, ll->delta);
109 324891a5 2006-06-25 devnull p1 = subpt(ll->p1, ll->delta);
110 324891a5 2006-06-25 devnull clipr = rectsubpt(clipr, ll->delta);
112 324891a5 2006-06-25 devnull p0 = ll->p0;
113 324891a5 2006-06-25 devnull p1 = ll->p1;
115 324891a5 2006-06-25 devnull _memline(dst, p0, p1, ll->end0, ll->end1, ll->radius, ll->src, ll->sp, clipr, ll->op);
119 324891a5 2006-06-25 devnull memline(Memimage *dst, Point p0, Point p1, int end0, int end1, int radius, Memimage *src, Point sp, int op)
121 324891a5 2006-06-25 devnull _memline(dst, p0, p1, end0, end1, radius, src, sp, dst->clipr, op);
