1 files changed, 83 insertions, 0 deletions
diff --git a/gpr/source/lib/dng_sdk/dng_spline.h b/gpr/source/lib/dng_sdk/dng_spline.h
new file mode 100644
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+++ b/gpr/source/lib/dng_sdk/dng_spline.h
@@ -0,0 +1,83 @@
+/*****************************************************************************/
+// Copyright 2006-2007 Adobe Systems Incorporated
+// All Rights Reserved.
+//
+// NOTICE:  Adobe permits you to use, modify, and distribute this file in
+// accordance with the terms of the Adobe license agreement accompanying it.
+/*****************************************************************************/
+
+/* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_spline.h#1 $ */ 
+/* $DateTime: 2012/05/30 13:28:51 $ */
+/* $Change: 832332 $ */
+/* $Author: tknoll $ */
+
+/*****************************************************************************/
+
+#ifndef __dng_spline__
+#define __dng_spline__
+
+/*****************************************************************************/
+
+#include "dng_1d_function.h"
+
+#include <vector>
+
+/*****************************************************************************/
+
+inline real64 EvaluateSplineSegment (real64 x,
+								     real64 x0,
+								     real64 y0,
+								     real64 s0,
+								     real64 x1,
+								     real64 y1,
+								     real64 s1)
+	{
+	
+	real64 A = x1 - x0;
+
+	real64 B = (x - x0) / A;
+
+	real64 C = (x1 - x) / A;
+
+	real64 D = ((y0 * (2.0 - C + B) + (s0 * A * B)) * (C * C)) +
+			   ((y1 * (2.0 - B + C) - (s1 * A * C)) * (B * B));
+			   
+	return D;
+	
+	}
+
+/*****************************************************************************/
+
+class dng_spline_solver: public dng_1d_function
+	{
+	
+	protected:
+	
+		std::vector<real64> X;
+		std::vector<real64> Y;
+		
+		std::vector<real64> S;
+		
+	public:
+	
+		dng_spline_solver ();
+		
+		virtual ~dng_spline_solver ();
+			
+		void Reset ();
+
+		void Add (real64 x, real64 y);
+
+		virtual void Solve ();
+
+		virtual bool IsIdentity () const;
+
+		virtual real64 Evaluate (real64 x) const;
+
+	};
+
+/*****************************************************************************/
+
+#endif
+	
+/*****************************************************************************/