From 8b8a3aee66e22bdf9314a0e6b7ffd92f84313246 Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Sat, 23 Oct 2010 18:49:46 +0000
Subject: [PATCH]

---
 magick/fx.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/magick/fx.c b/magick/fx.c
index 7e465de7e..5c966f215 100644
--- a/magick/fx.c
+++ b/magick/fx.c
@@ -215,6 +215,10 @@ MagickExport FxInfo *AcquireFxInfo(const Image *image,const char *expression)
       (void) SubstituteString(&fx_info->expression,"8e-","8**10^-");
       (void) SubstituteString(&fx_info->expression,"9e-","9**10^-");
     }
+  /*
+    Force right-to-left associativity for unary negation.
+  */
+  (void) SubstituteString(&fx_info->expression,"-","-1.0*");
   /*
     Convert complex to simple operators.
   */
@@ -2302,7 +2306,7 @@ static MagickRealType FxEvaluateSubexpression(FxInfo *fx_info,
         exception);
       return(gamma);
     }
-  switch ((unsigned char) *expression)
+  switch (*expression)
   {
     case '+':
     {
-- 
2.40.0