ref: c04f70e2bb4a02655bb8a6247a8f07f75ff431bd
dir: /libmemdraw/unload.c/
#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; }