ref: 1018d7a7091fd5e0433f501a3474cdc3fec322cc
dir: /libmemlayer/unload.c/
#include "lib9.h" #include "draw.h" #include "memdraw.h" #include "memlayer.h" int memunload(Memimage *src, Rectangle r, uchar *data, int n) { Memimage *tmp; Memlayer *dl; Rectangle lr; int dx; Top: dl = src->layer; if(dl == nil) return unloadmemimage(src, r, data, n); /* * Convert to screen coordinates. */ lr = r; r.min.x += dl->delta.x; r.min.y += dl->delta.y; r.max.x += dl->delta.x; r.max.y += dl->delta.y; dx = dl->delta.x&(7/src->depth); if(dl->clear && dx==0){ src = dl->screen->image; goto Top; } /* * src is an obscured layer or data is unaligned */ if(dl->save && dx==0){ if(dl->refreshfn != nil) return -1; /* can't unload window if it's not Refbackup */ if(n > 0) memlhide(src, r); n = unloadmemimage(dl->save, lr, data, n); return n; } tmp = allocmemimage(lr, src->chan); if(tmp == nil) return -1; memdraw(tmp, lr, src, lr.min, nil, lr.min, S); n = unloadmemimage(tmp, lr, data, n); freememimage(tmp); return n; }