| rsc | ed7c8e8 | 2003-09-30 17:47:42 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | #include <draw.h> |
| 4 | |
| 5 | int |
| 6 | loadimage(Image *i, Rectangle r, uchar *data, int ndata) |
| 7 | { |
| 8 | long dy; |
| 9 | int n, bpl; |
| 10 | uchar *a; |
| 11 | int chunk; |
| 12 | |
| 13 | chunk = i->display->bufsize - 64; |
| 14 | |
| 15 | if(!rectinrect(r, i->r)){ |
| 16 | werrstr("loadimage: bad rectangle"); |
| 17 | return -1; |
| 18 | } |
| 19 | bpl = bytesperline(r, i->depth); |
| 20 | n = bpl*Dy(r); |
| 21 | if(n > ndata){ |
| 22 | werrstr("loadimage: insufficient data"); |
| 23 | return -1; |
| 24 | } |
| 25 | ndata = 0; |
| 26 | while(r.max.y > r.min.y){ |
| 27 | dy = r.max.y - r.min.y; |
| 28 | if(dy*bpl > chunk) |
| 29 | dy = chunk/bpl; |
| 30 | if(dy <= 0){ |
| 31 | werrstr("loadimage: image too wide for buffer"); |
| 32 | return -1; |
| 33 | } |
| 34 | n = dy*bpl; |
| 35 | a = bufimage(i->display, 21+n); |
| 36 | if(a == nil){ |
| 37 | werrstr("bufimage failed"); |
| 38 | return -1; |
| 39 | } |
| 40 | a[0] = 'y'; |
| 41 | BPLONG(a+1, i->id); |
| 42 | BPLONG(a+5, r.min.x); |
| 43 | BPLONG(a+9, r.min.y); |
| 44 | BPLONG(a+13, r.max.x); |
| 45 | BPLONG(a+17, r.min.y+dy); |
| 46 | memmove(a+21, data, n); |
| 47 | ndata += n; |
| 48 | data += n; |
| 49 | r.min.y += dy; |
| 50 | } |
| 51 | if(flushimage(i->display, 0) < 0) |
| 52 | return -1; |
| 53 | return ndata; |
| 54 | } |
