70 lines
1.0 KiB
C
70 lines
1.0 KiB
C
#include <u.h>
|
|
#include <libc.h>
|
|
#include <draw.h>
|
|
#include <memdraw.h>
|
|
#include <memlayer.h>
|
|
|
|
void
|
|
_memltorear(Memimage *i, Memimage *rear)
|
|
{
|
|
Memlayer *l;
|
|
Memscreen *s;
|
|
Memimage *f, *r, *rr;
|
|
Rectangle x;
|
|
int overlap;
|
|
|
|
l = i->layer;
|
|
s = l->screen;
|
|
while(l->rear != rear){
|
|
r = l->rear;
|
|
x = l->screenr;
|
|
overlap = rectclip(&x, r->layer->screenr);
|
|
if(overlap){
|
|
memlhide(i, x);
|
|
l->clear = 0;
|
|
}
|
|
/* swap l and r in screen's list */
|
|
rr = r->layer->rear;
|
|
f = l->front;
|
|
if(rr == nil)
|
|
s->rearmost = i;
|
|
else
|
|
rr->layer->front = i;
|
|
if(f == nil)
|
|
s->frontmost = r;
|
|
else
|
|
f->layer->rear = r;
|
|
l->rear = rr;
|
|
l->front = r;
|
|
r->layer->rear = i;
|
|
r->layer->front = f;
|
|
if(overlap)
|
|
memlexpose(r, x);
|
|
}
|
|
}
|
|
|
|
void
|
|
memltorear(Memimage *i)
|
|
{
|
|
_memltorear(i, nil);
|
|
_memlsetclear(i->layer->screen);
|
|
}
|
|
|
|
void
|
|
memltorearn(Memimage **ip, int n)
|
|
{
|
|
Memimage *i, *rear;
|
|
Memscreen *s;
|
|
|
|
if(n == 0)
|
|
return;
|
|
rear = nil;
|
|
while(--n >= 0){
|
|
i = *ip++;
|
|
_memltorear(i, rear);
|
|
rear = i;
|
|
}
|
|
s = rear->layer->screen;
|
|
_memlsetclear(s);
|
|
}
|