1*8ccd4a63SDavid du Colombier #include <u.h>
2*8ccd4a63SDavid du Colombier #include <libc.h>
3*8ccd4a63SDavid du Colombier #include <draw.h>
4*8ccd4a63SDavid du Colombier #include <memdraw.h>
5*8ccd4a63SDavid du Colombier #include <memlayer.h>
67dd7cddfSDavid du Colombier
77dd7cddfSDavid du Colombier /*
87dd7cddfSDavid du Colombier * Pull i towards top of screen, just behind front
97dd7cddfSDavid du Colombier */
107dd7cddfSDavid du Colombier static
117dd7cddfSDavid du Colombier void
_memltofront(Memimage * i,Memimage * front,int fill)12*8ccd4a63SDavid du Colombier _memltofront(Memimage *i, Memimage *front, int fill)
137dd7cddfSDavid du Colombier {
147dd7cddfSDavid du Colombier Memlayer *l;
157dd7cddfSDavid du Colombier Memscreen *s;
167dd7cddfSDavid du Colombier Memimage *f, *ff, *rr;
177dd7cddfSDavid du Colombier Rectangle x;
187dd7cddfSDavid du Colombier int overlap;
197dd7cddfSDavid du Colombier
207dd7cddfSDavid du Colombier l = i->layer;
217dd7cddfSDavid du Colombier s = l->screen;
227dd7cddfSDavid du Colombier while(l->front != front){
237dd7cddfSDavid du Colombier f = l->front;
247dd7cddfSDavid du Colombier x = l->screenr;
257dd7cddfSDavid du Colombier overlap = rectclip(&x, f->layer->screenr);
267dd7cddfSDavid du Colombier if(overlap){
277dd7cddfSDavid du Colombier memlhide(f, x);
287dd7cddfSDavid du Colombier f->layer->clear = 0;
297dd7cddfSDavid du Colombier }
307dd7cddfSDavid du Colombier /* swap l and f in screen's list */
317dd7cddfSDavid du Colombier ff = f->layer->front;
327dd7cddfSDavid du Colombier rr = l->rear;
337dd7cddfSDavid du Colombier if(ff == nil)
347dd7cddfSDavid du Colombier s->frontmost = i;
357dd7cddfSDavid du Colombier else
367dd7cddfSDavid du Colombier ff->layer->rear = i;
377dd7cddfSDavid du Colombier if(rr == nil)
387dd7cddfSDavid du Colombier s->rearmost = f;
397dd7cddfSDavid du Colombier else
407dd7cddfSDavid du Colombier rr->layer->front = f;
417dd7cddfSDavid du Colombier l->front = ff;
427dd7cddfSDavid du Colombier l->rear = f;
437dd7cddfSDavid du Colombier f->layer->front = i;
447dd7cddfSDavid du Colombier f->layer->rear = rr;
45*8ccd4a63SDavid du Colombier if(overlap && fill)
467dd7cddfSDavid du Colombier memlexpose(i, x);
477dd7cddfSDavid du Colombier }
487dd7cddfSDavid du Colombier }
497dd7cddfSDavid du Colombier
507dd7cddfSDavid du Colombier void
_memltofrontfill(Memimage * i,int fill)51*8ccd4a63SDavid du Colombier _memltofrontfill(Memimage *i, int fill)
52*8ccd4a63SDavid du Colombier {
53*8ccd4a63SDavid du Colombier _memltofront(i, nil, fill);
54*8ccd4a63SDavid du Colombier _memlsetclear(i->layer->screen);
55*8ccd4a63SDavid du Colombier }
56*8ccd4a63SDavid du Colombier
57*8ccd4a63SDavid du Colombier void
memltofront(Memimage * i)587dd7cddfSDavid du Colombier memltofront(Memimage *i)
597dd7cddfSDavid du Colombier {
60*8ccd4a63SDavid du Colombier _memltofront(i, nil, 1);
61*8ccd4a63SDavid du Colombier _memlsetclear(i->layer->screen);
627dd7cddfSDavid du Colombier }
637dd7cddfSDavid du Colombier
647dd7cddfSDavid du Colombier void
memltofrontn(Memimage ** ip,int n)657dd7cddfSDavid du Colombier memltofrontn(Memimage **ip, int n)
667dd7cddfSDavid du Colombier {
677dd7cddfSDavid du Colombier Memimage *i, *front;
687dd7cddfSDavid du Colombier Memscreen *s;
697dd7cddfSDavid du Colombier
707dd7cddfSDavid du Colombier if(n == 0)
717dd7cddfSDavid du Colombier return;
727dd7cddfSDavid du Colombier front = nil;
737dd7cddfSDavid du Colombier while(--n >= 0){
747dd7cddfSDavid du Colombier i = *ip++;
75*8ccd4a63SDavid du Colombier _memltofront(i, front, 1);
767dd7cddfSDavid du Colombier front = i;
777dd7cddfSDavid du Colombier }
787dd7cddfSDavid du Colombier s = front->layer->screen;
79*8ccd4a63SDavid du Colombier _memlsetclear(s);
807dd7cddfSDavid du Colombier }
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