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#include "lib9.h"
#include "draw.h"
#include "memdraw.h"
int
unloadmemimage(Memimage *i, Rectangle r, uchar *data, int ndata)
{
int y, l;
uchar *q;
if(!rectinrect(r, i->r))
return -1;
l = bytesperline(r, i->depth);
if(ndata < l*Dy(r))
return -1;
ndata = l*Dy(r);
q = byteaddr(i, r.min);
for(y=r.min.y; y<r.max.y; y++){
memmove(data, q, l);
q += i->width*sizeof(ulong);
data += l;
}
return ndata;
}
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