mirror of
https://github.com/0intro/conterm
synced 2024-11-22 05:41:28 +03:00
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
#include <u.h>
|
|
#include <libc.h>
|
|
#include <draw.h>
|
|
#include <memdraw.h>
|
|
#include <memlayer.h>
|
|
|
|
Memimage*
|
|
memlalloc(Memscreen *s, Rectangle screenr, Refreshfn refreshfn, void *refreshptr, ulong val)
|
|
{
|
|
Memlayer *l;
|
|
Memimage *n;
|
|
static Memimage *paint;
|
|
|
|
if(paint == nil){
|
|
paint = allocmemimage(Rect(0,0,1,1), RGBA32);
|
|
if(paint == nil)
|
|
return nil;
|
|
paint->flags |= Frepl;
|
|
paint->clipr = Rect(-0x3FFFFFF, -0x3FFFFFF, 0x3FFFFFF, 0x3FFFFFF);
|
|
}
|
|
|
|
n = allocmemimaged(screenr, s->image->chan, s->image->data, s->image->X);
|
|
if(n == nil)
|
|
return nil;
|
|
l = malloc(sizeof(Memlayer));
|
|
if(l == nil){
|
|
free(n);
|
|
return nil;
|
|
}
|
|
|
|
l->screen = s;
|
|
if(refreshfn)
|
|
l->save = nil;
|
|
else{
|
|
l->save = allocmemimage(screenr, s->image->chan);
|
|
if(l->save == nil){
|
|
free(l);
|
|
free(n);
|
|
return nil;
|
|
}
|
|
/* allocmemimage doesn't initialize memory; this paints save area */
|
|
if(val != DNofill)
|
|
memfillcolor(l->save, val);
|
|
}
|
|
l->refreshfn = refreshfn;
|
|
l->refreshptr = nil; /* don't set it until we're done */
|
|
l->screenr = screenr;
|
|
l->delta = Pt(0,0);
|
|
|
|
n->data->ref++;
|
|
n->zero = s->image->zero;
|
|
n->width = s->image->width;
|
|
n->layer = l;
|
|
|
|
/* start with new window behind all existing ones */
|
|
l->front = s->rearmost;
|
|
l->rear = nil;
|
|
if(s->rearmost)
|
|
s->rearmost->layer->rear = n;
|
|
s->rearmost = n;
|
|
if(s->frontmost == nil)
|
|
s->frontmost = n;
|
|
l->clear = 0;
|
|
|
|
/* now pull new window to front */
|
|
_memltofrontfill(n, val != DNofill);
|
|
l->refreshptr = refreshptr;
|
|
|
|
/*
|
|
* paint with requested color; previously exposed areas are already right
|
|
* if this window has backing store, but just painting the whole thing is simplest.
|
|
*/
|
|
if(val != DNofill){
|
|
memsetchan(paint, n->chan);
|
|
memfillcolor(paint, val);
|
|
memdraw(n, n->r, paint, n->r.min, nil, n->r.min, S);
|
|
}
|
|
return n;
|
|
}
|