$OpenBSD: patch-splash_SplashXPathScanner_cc,v 1.1 2006/02/05 09:59:38 bernd Exp $
--- splash/SplashXPathScanner.cc.orig	Sat Feb  4 14:44:27 2006
+++ splash/SplashXPathScanner.cc	Sat Feb  4 14:46:44 2006
@@ -182,7 +182,7 @@ GBool SplashXPathScanner::getNextSpan(in
 }
 
 void SplashXPathScanner::computeIntersections(int y) {
-  SplashCoord ySegMin, ySegMax, xx0, xx1;
+  SplashCoord xSegMin, xSegMax, ySegMin, ySegMax, xx0, xx1;
   SplashXPathSeg *seg;
   int i, j;
 
@@ -232,19 +232,27 @@ void SplashXPathScanner::computeIntersec
     } else if (seg->flags & splashXPathVert) {
       xx0 = xx1 = seg->x0;
     } else {
-      if (ySegMin <= y) {
-	// intersection with top edge
-	xx0 = seg->x0 + (y - seg->y0) * seg->dxdy;
+      if (seg->x0 < seg->x1) {
+       xSegMin = seg->x0;
+       xSegMax = seg->x1;
       } else {
-	// x coord of segment endpoint with min y coord
-	xx0 = (seg->flags & splashXPathFlip) ? seg->x1 : seg->x0;
+       xSegMin = seg->x1;
+       xSegMax = seg->x0;
       }
-      if (ySegMax >= y + 1) {
-	// intersection with bottom edge
-	xx1 = seg->x0 + (y + 1 - seg->y0) * seg->dxdy;
-      } else {
-	// x coord of segment endpoint with max y coord
-	xx1 = (seg->flags & splashXPathFlip) ? seg->x0 : seg->x1;
+      // intersection with top edge
+      xx0 = seg->x0 + ((SplashCoord)y - seg->y0) * seg->dxdy;
+      // intersection with bottom edge
+      xx1 = seg->x0 + ((SplashCoord)y + 1 - seg->y0) * seg->dxdy;
+      // the segment may not actually extend to the top and/or bottom edges
+      if (xx0 < xSegMin) {
+       xx0 = xSegMin;
+      } else if (xx0 > xSegMax) {
+       xx0 = xSegMax;
+      }
+      if (xx1 < xSegMin) {
+       xx1 = xSegMin;
+      } else if (xx1 > xSegMax) {
+       xx1 = xSegMax;
       }
     }
     if (xx0 < xx1) {