From: John Tsiombikas <nuclear@mutantstargoat.com>
Date: Sat, 15 Sep 2018 16:32:52 +0000 (+0300)
Subject: fixed overdlow when calculating winding of large polygons in the
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=commitdiff_plain;h=e0a94da7c7b657cebbb9e07c861054540706d5da

fixed overdlow when calculating winding of large polygons in the
rasterizert
---

diff --git a/src/polytmpl.h b/src/polytmpl.h
index d61ac8e..2147666 100644
--- a/src/polytmpl.h
+++ b/src/polytmpl.h
@@ -96,7 +96,7 @@ void POLYFILL(struct pvertex *pv, int nverts)
 	int winding = 0;
 	for(i=0; i<nverts; i++) {
 		int next = NEXTIDX(i);
-		winding += (pv[next].x - pv[i].x) * (pv[next].y + pv[i].y);
+		winding += ((pv[next].x - pv[i].x) >> 8) * ((pv[next].y + pv[i].y) >> 8);
 	}
 
 	/* +1 to avoid crashing due to off-by-one rounding errors in the rasterization */