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- #include <u.h>
- #include <libc.h>
- #include <draw.h>
- #include <memdraw.h>
- #include <memlayer.h>
- void
- memldelete(Memimage *i)
- {
- Memscreen *s;
- Memlayer *l;
- l = i->layer;
- /* free backing store and disconnect refresh, to make pushback fast */
- freememimage(l->save);
- l->save = nil;
- l->refreshptr = nil;
- memltorear(i);
- /* window is now the rearmost; clean up screen structures and deallocate */
- s = i->layer->screen;
- if(s->fill){
- i->clipr = i->r;
- memdraw(i, i->r, s->fill, i->r.min, nil, i->r.min, S);
- }
- if(l->front){
- l->front->layer->rear = nil;
- s->rearmost = l->front;
- }else{
- s->frontmost = nil;
- s->rearmost = nil;
- }
- free(l);
- freememimage(i);
- }
- /*
- * Just free the data structures, don't do graphics
- */
- void
- memlfree(Memimage *i)
- {
- Memlayer *l;
- l = i->layer;
- freememimage(l->save);
- free(l);
- freememimage(i);
- }
- void
- _memlsetclear(Memscreen *s)
- {
- Memimage *i, *j;
- Memlayer *l;
- for(i=s->rearmost; i; i=i->layer->front){
- l = i->layer;
- l->clear = rectinrect(l->screenr, l->screen->image->clipr);
- if(l->clear)
- for(j=l->front; j; j=j->layer->front)
- if(rectXrect(l->screenr, j->layer->screenr)){
- l->clear = 0;
- break;
- }
- }
- }
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