Warning: Attempt to read property "date" on null in /usr/local/www/websvn.planix.org/blame.php on line 247

Warning: Attempt to read property "msg" on null in /usr/local/www/websvn.planix.org/blame.php on line 247
WebSVN – planix.SVN – Blame – /os/branches/feature_posix/sys/src/libmemlayer/lalloc.c – Rev 2

Subversion Repositories planix.SVN

Rev

Go to most recent revision | Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 - 1 
#include <u.h>
2 
#include <libc.h>
3 
#include <draw.h>
4 
#include <memdraw.h>
5 
#include <memlayer.h>
6 
 
7 
Memimage*
8 
memlalloc(Memscreen *s, Rectangle screenr, Refreshfn refreshfn, void *refreshptr, ulong val)
9 
{
10 
	Memlayer *l;
11 
	Memimage *n;
12 
	static Memimage *paint;
13 
 
14 
	if(paint == nil){
15 
		paint = allocmemimage(Rect(0,0,1,1), RGBA32);
16 
		if(paint == nil)
17 
			return nil;
18 
		paint->flags |= Frepl;
19 
		paint->clipr = Rect(-0x3FFFFFF, -0x3FFFFFF, 0x3FFFFFF, 0x3FFFFFF);
20 
	}
21 
 
22 
	n = allocmemimaged(screenr, s->image->chan, s->image->data);
23 
	if(n == nil)
24 
		return nil;
25 
	l = malloc(sizeof(Memlayer));
26 
	if(l == nil){
27 
		free(n);
28 
		return nil;
29 
	}
30 
 
31 
	l->screen = s;
32 
	if(refreshfn)
33 
		l->save = nil;
34 
	else{
35 
		l->save = allocmemimage(screenr, s->image->chan);
36 
		if(l->save == nil){
37 
			free(l);
38 
			free(n);
39 
			return nil;
40 
		}
41 
		/* allocmemimage doesn't initialize memory; this paints save area */
42 
		if(val != DNofill)
43 
			memfillcolor(l->save, val);
44 
	}
45 
	l->refreshfn = refreshfn;
46 
	l->refreshptr = nil;	/* don't set it until we're done */
47 
	l->screenr = screenr;
48 
	l->delta = Pt(0,0);
49 
 
50 
	n->data->ref++;
51 
	n->zero = s->image->zero;
52 
	n->width = s->image->width;
53 
	n->layer = l;
54 
 
55 
	/* start with new window behind all existing ones */
56 
	l->front = s->rearmost;
57 
	l->rear = nil;
58 
	if(s->rearmost)
59 
		s->rearmost->layer->rear = n;
60 
	s->rearmost = n;
61 
	if(s->frontmost == nil)
62 
		s->frontmost = n;
63 
	l->clear = 0;
64 
 
65 
	/* now pull new window to front */
66 
	_memltofrontfill(n, val != DNofill);
67 
	l->refreshptr = refreshptr;
68 
 
69 
	/*
70 
	 * paint with requested color; previously exposed areas are already right
71 
	 * if this window has backing store, but just painting the whole thing is simplest.
72 
	 */
73 
	if(val != DNofill){
74 
		memsetchan(paint, n->chan);
75 
		memfillcolor(paint, val);
76 
		memdraw(n, n->r, paint, n->r.min, nil, n->r.min, S);
77 
	}
78 
	return n;
79 
}