From 2b8abc4bfac6616f4027bbc4e2a504b63594515b Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@mapbox.com>
Date: Tue, 14 Jul 2015 19:19:39 -0700
Subject: [PATCH] fix #2975 - remove usage of boost/algorithm/clamp.hpp

---
 include/mapnik/transform_processor.hpp | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/include/mapnik/transform_processor.hpp b/include/mapnik/transform_processor.hpp
index 5bd25ee3b..bec6bff3b 100644
--- a/include/mapnik/transform_processor.hpp
+++ b/include/mapnik/transform_processor.hpp
@@ -31,8 +31,7 @@
 #include <mapnik/util/variant.hpp>
 // agg
 #include <agg_trans_affine.h>
-// boost
-#include <boost/algorithm/clamp.hpp>
+
 // stl
 #include <cmath>
 
@@ -154,14 +153,18 @@ struct transform_processor
         void operator() (skewX_node const& node)
         {
             auto degrees = std::fmod(eval(node.angle_),90.0);
-            auto angle = deg2rad(boost::algorithm::clamp(degrees, -89.0, 89.0));
+            if (degrees < -89.0) degrees = -89.0;
+            else if (degrees > 89.0) degrees = 89.0;
+            auto angle = deg2rad(degrees);
             transform_.multiply(agg::trans_affine_skewing(angle, 0.0));
         }
 
         void operator() (skewY_node const& node)
         {
             auto degrees = std::fmod(eval(node.angle_),90.0);
-            auto angle = deg2rad(boost::algorithm::clamp(degrees, -89.0, 89.0));
+            if (degrees < -89.0) degrees = -89.0;
+            else if (degrees > 89.0) degrees = 89.0;
+            auto angle = deg2rad(degrees);
             transform_.multiply(agg::trans_affine_skewing(0.0, angle));
         }