From c92fd8c64782d83d4b08f35c370578cd01cfa9f1 Mon Sep 17 00:00:00 2001
From: giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8>
Date: Wed, 17 Sep 2008 02:31:55 +0000
Subject: Fix crash when line is completely out of frame

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@727 9d0c8265-081b-0410-96cb-a4ca84ce46f8
---
 lib/libppmd.c | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'lib/libppmd.c')

diff --git a/lib/libppmd.c b/lib/libppmd.c
index 167d5c76..1046ce68 100644
--- a/lib/libppmd.c
+++ b/lib/libppmd.c
@@ -260,6 +260,14 @@ clipEnd0(int    const x0,
         }
     }
 
+    /* Clipping vertically may have moved the endpoint out of frame
+       horizontally.  If so, we know the other endpoint is also out of
+       frame horizontally and the line misses the frame entirely.
+    */
+    if (cx0 < 0 || cx0 >= cols) {
+        assert(x1 < 0 || x1 >= cols);
+        noLine = TRUE;
+    }
     *cx0P = cx0;
     *cy0P = cy0;
     *noLineP = noLine;
-- 
cgit 1.4.1