| rsc | 76193d7 | 2003-09-30 17:47:42 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <draw.h> |
| 4 | #include <memdraw.h> |
| 5 | #include <memlayer.h> |
| 6 | |
| 7 | int |
| 8 | memload(Memimage *dst, Rectangle r, uchar *data, int n, int iscompressed) |
| 9 | { |
| 10 | int (*loadfn)(Memimage*, Rectangle, uchar*, int); |
| 11 | Memimage *tmp; |
| 12 | Memlayer *dl; |
| 13 | Rectangle lr; |
| 14 | int dx; |
| 15 | |
| 16 | loadfn = loadmemimage; |
| 17 | if(iscompressed) |
| 18 | loadfn = cloadmemimage; |
| 19 | |
| 20 | Top: |
| 21 | dl = dst->layer; |
| 22 | if(dl == nil) |
| 23 | return loadfn(dst, r, data, n); |
| 24 | |
| 25 | /* |
| 26 | * Convert to screen coordinates. |
| 27 | */ |
| 28 | lr = r; |
| 29 | r.min.x += dl->delta.x; |
| 30 | r.min.y += dl->delta.y; |
| 31 | r.max.x += dl->delta.x; |
| 32 | r.max.y += dl->delta.y; |
| 33 | dx = dl->delta.x&(7/dst->depth); |
| 34 | if(dl->clear && dx==0){ |
| 35 | dst = dl->screen->image; |
| 36 | goto Top; |
| 37 | } |
| 38 | |
| 39 | /* |
| 40 | * dst is an obscured layer or data is unaligned |
| 41 | */ |
| 42 | if(dl->save && dx==0){ |
| 43 | n = loadfn(dl->save, lr, data, n); |
| 44 | if(n > 0) |
| 45 | memlexpose(dst, r); |
| 46 | return n; |
| 47 | } |
| 48 | tmp = allocmemimage(lr, dst->chan); |
| 49 | if(tmp == nil) |
| 50 | return -1; |
| 51 | n = loadfn(tmp, lr, data, n); |
| 52 | memdraw(dst, lr, tmp, lr.min, nil, lr.min, S); |
| 53 | freememimage(tmp); |
| 54 | return n; |
| 55 | } |
