blob: cbf877f5d67049f3d28a1c69dbe8e135b7ea1823 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
#include <u.h>
#include <libc.h>
#include <libg.h>
#include <gnot.h>
void
gbitbltclip(void *vp)
{
int dx, dy;
int i;
struct{
GBitmap *dm;
Point p;
GBitmap *sm;
Rectangle r;
Fcode f;
}*bp;
bp = vp;
dx = Dx(bp->r);
dy = Dy(bp->r);
if(bp->p.x < bp->dm->clipr.min.x){
i = bp->dm->clipr.min.x-bp->p.x;
bp->r.min.x += i;
bp->p.x += i;
dx -= i;
}
if(bp->p.y < bp->dm->clipr.min.y){
i = bp->dm->clipr.min.y-bp->p.y;
bp->r.min.y += i;
bp->p.y += i;
dy -= i;
}
if(bp->p.x+dx > bp->dm->clipr.max.x)
bp->r.max.x -= bp->p.x+dx-bp->dm->clipr.max.x;
if(bp->p.y+dy > bp->dm->clipr.max.y)
bp->r.max.y -= bp->p.y+dy-bp->dm->clipr.max.y;
if(bp->r.min.x < bp->sm->clipr.min.x){
i = bp->sm->clipr.min.x-bp->r.min.x;
bp->p.x += i;
bp->r.min.x += i;
}
if(bp->r.min.y < bp->sm->clipr.min.y){
i = bp->sm->clipr.min.y-bp->r.min.y;
bp->p.y += i;
bp->r.min.y += i;
}
if(bp->r.max.x > bp->sm->clipr.max.x)
bp->r.max.x = bp->sm->clipr.max.x;
if(bp->r.max.y > bp->sm->clipr.max.y)
bp->r.max.y = bp->sm->clipr.max.y;
}
|
