| #include <u.h> |
| #include <libc.h> |
| #include <draw.h> |
| |
| int |
| loadimage(Image *i, Rectangle r, uchar *data, int ndata) |
| { |
| long dy; |
| int n, bpl; |
| uchar *a; |
| int chunk; |
| |
| chunk = i->display->bufsize - 64; |
| |
| if(!rectinrect(r, i->r)){ |
| werrstr("loadimage: bad rectangle"); |
| return -1; |
| } |
| bpl = bytesperline(r, i->depth); |
| n = bpl*Dy(r); |
| if(n > ndata){ |
| werrstr("loadimage: insufficient data"); |
| return -1; |
| } |
| ndata = 0; |
| while(r.max.y > r.min.y){ |
| dy = r.max.y - r.min.y; |
| if(dy*bpl > chunk) |
| dy = chunk/bpl; |
| if(dy <= 0){ |
| werrstr("loadimage: image too wide for buffer"); |
| return -1; |
| } |
| n = dy*bpl; |
| a = bufimage(i->display, 21+n); |
| if(a == nil){ |
| werrstr("bufimage failed"); |
| return -1; |
| } |
| a[0] = 'y'; |
| BPLONG(a+1, i->id); |
| BPLONG(a+5, r.min.x); |
| BPLONG(a+9, r.min.y); |
| BPLONG(a+13, r.max.x); |
| BPLONG(a+17, r.min.y+dy); |
| memmove(a+21, data, n); |
| ndata += n; |
| data += n; |
| r.min.y += dy; |
| } |
| if(flushimage(i->display, 0) < 0) |
| return -1; |
| return ndata; |
| } |