From: martin-s <martin-s@ffa7fe5e-494d-0410-b361-a75ebd5db220>
Date: Thu, 11 Mar 2010 20:24:51 +0000 (+0000)
Subject: Fix:core:Reduce stack usage for objects with many coordinates
X-Git-Tag: navit-0.5.0.5194svn~2195
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6ff673357ae67bfed7f3351fc57f2b1d6677e0cf;p=profile%2Fivi%2Fnavit.git

Fix:core:Reduce stack usage for objects with many coordinates

git-svn-id: https://navit.svn.sourceforge.net/svnroot/navit/trunk@2996 ffa7fe5e-494d-0410-b361-a75ebd5db220
---

diff --git a/navit/navit/graphics.c b/navit/navit/graphics.c
index b279225..a04c2fc 100644
--- a/navit/navit/graphics.c
+++ b/navit/navit/graphics.c
@@ -1458,9 +1458,10 @@ static void
 graphics_draw_polygon_clipped(struct graphics *gra, struct graphics_gc *gc, struct point *pin, int count_in)
 {
 	struct point_rect r=gra->r;
-	struct point *pout,*p,*s,pi;
-	struct point p1[count_in*8+1];
-	struct point p2[count_in*8+1];
+	struct point *pout,*p,*s,pi,*p1,*p2;
+	int limit=10000;
+	struct point pa1[count_in < limit ? count_in*8+1:0];
+	struct point pa2[count_in < limit ? count_in*8+1:0];
 	int count_out,edge=3;
 	int i;
 #if 0
@@ -1469,7 +1470,14 @@ graphics_draw_polygon_clipped(struct graphics *gra, struct graphics_gc *gc, stru
 	r.rl.x-=20;
 	r.rl.y-=20;
 #endif
-
+	if (count_in < limit) {
+		p1=pa1;
+		p2=pa2;
+	} else {
+		p1=g_new(struct point, count_in*8+1);
+		p2=g_new(struct point, count_in*8+1);
+	}
+	
 	pout=p1;
 	for (edge = 0 ; edge < 4 ; edge++) {
 		p=pin;
@@ -1501,6 +1509,10 @@ graphics_draw_polygon_clipped(struct graphics *gra, struct graphics_gc *gc, stru
 		}
 	}
 	gra->meth.draw_polygon(gra->priv, gc->priv, pin, count_in);
+	if (count_in >= limit) {
+		g_free(p1);
+		g_free(p2);
+	}
 }