vx32

Local 9vx git repository for patches.
git clone git://r-36.net/vx32
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lsetrefresh.c (702B)

      1 #include "u.h"
      2 #include "lib.h"
      3 #include "draw.h"
      4 #include "memdraw.h"
      5 #include "memlayer.h"
      6 
      7 int
      8 memlsetrefresh(Memimage *i, Refreshfn fn, void *ptr)
      9 {
     10 	Memlayer *l;
     11 
     12 	l = i->layer;
     13 	if(l->refreshfn!=nil && fn!=nil){	/* just change functions */
     14 		l->refreshfn = fn;
     15 		l->refreshptr = ptr;
     16 		return 1;
     17 	}
     18 
     19 	if(l->refreshfn == nil){	/* is using backup image; just free it */
     20 		freememimage(l->save);
     21 		l->save = nil;
     22 		l->refreshfn = fn;
     23 		l->refreshptr = ptr;
     24 		return 1;
     25 	}
     26 
     27 	l->save = allocmemimage(i->r, i->chan);
     28 	if(l->save == nil)
     29 		return 0;
     30 	/* easiest way is just to update the entire save area */
     31 	l->refreshfn(i, i->r, l->refreshptr);
     32 	l->refreshfn = nil;
     33 	l->refreshptr = nil;
     34 	return 1;
     35 }