1 /*****************************************************************************/ 2 // Copyright 2006-2007 Adobe Systems Incorporated 3 // All Rights Reserved. 4 // 5 // NOTICE: Adobe permits you to use, modify, and distribute this file in 6 // accordance with the terms of the Adobe license agreement accompanying it. 7 /*****************************************************************************/ 8 9 /* $Id: //mondo/dng_sdk_1_4/dng_sdk/source/dng_spline.h#1 $ */ 10 /* $DateTime: 2012/05/30 13:28:51 $ */ 11 /* $Change: 832332 $ */ 12 /* $Author: tknoll $ */ 13 14 /*****************************************************************************/ 15 16 #ifndef __dng_spline__ 17 #define __dng_spline__ 18 19 /*****************************************************************************/ 20 21 #include "dng_1d_function.h" 22 #include "dng_memory.h" 23 24 #include <vector> 25 26 /*****************************************************************************/ 27 28 inline real64 EvaluateSplineSegment (real64 x, 29 real64 x0, 30 real64 y0, 31 real64 s0, 32 real64 x1, 33 real64 y1, 34 real64 s1) 35 { 36 37 real64 A = x1 - x0; 38 39 real64 B = (x - x0) / A; 40 41 real64 C = (x1 - x) / A; 42 43 real64 D = ((y0 * (2.0 - C + B) + (s0 * A * B)) * (C * C)) + 44 ((y1 * (2.0 - B + C) - (s1 * A * C)) * (B * B)); 45 46 return D; 47 48 } 49 50 /*****************************************************************************/ 51 52 class dng_spline_solver: public dng_1d_function 53 { 54 55 protected: 56 57 dng_std_vector<real64> X; 58 dng_std_vector<real64> Y; 59 60 dng_std_vector<real64> S; 61 62 public: 63 64 dng_spline_solver (); 65 66 virtual ~dng_spline_solver (); 67 68 void Reset (); 69 70 void Add (real64 x, real64 y); 71 72 virtual void Solve (); 73 74 virtual bool IsIdentity () const; 75 76 virtual real64 Evaluate (real64 x) const; 77 78 }; 79 80 /*****************************************************************************/ 81 82 #endif 83 84 /*****************************************************************************/ 85
