/src/dng_sdk/source/dng_1d_function.cpp
Line | Count | Source (jump to first uncovered line) |
1 | | /*****************************************************************************/ |
2 | | // Copyright 2006 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_1d_function.cpp#1 $ */ |
10 | | /* $DateTime: 2012/05/30 13:28:51 $ */ |
11 | | /* $Change: 832332 $ */ |
12 | | /* $Author: tknoll $ */ |
13 | | |
14 | | /*****************************************************************************/ |
15 | | |
16 | | #include "dng_1d_function.h" |
17 | | |
18 | | #include "dng_utils.h" |
19 | | |
20 | | /*****************************************************************************/ |
21 | | |
22 | | dng_1d_function::~dng_1d_function () |
23 | 72.1k | { |
24 | | |
25 | 72.1k | } |
26 | | |
27 | | /*****************************************************************************/ |
28 | | |
29 | | bool dng_1d_function::IsIdentity () const |
30 | 0 | { |
31 | | |
32 | 0 | return false; |
33 | | |
34 | 0 | } |
35 | | |
36 | | /*****************************************************************************/ |
37 | | |
38 | | real64 dng_1d_function::EvaluateInverse (real64 y) const |
39 | 0 | { |
40 | | |
41 | 0 | const uint32 kMaxIterations = 30; |
42 | 0 | const real64 kNearZero = 1.0e-10; |
43 | | |
44 | 0 | real64 x0 = 0.0; |
45 | 0 | real64 y0 = Evaluate (x0); |
46 | | |
47 | 0 | real64 x1 = 1.0; |
48 | 0 | real64 y1 = Evaluate (x1); |
49 | | |
50 | 0 | for (uint32 iteration = 0; iteration < kMaxIterations; iteration++) |
51 | 0 | { |
52 | | |
53 | 0 | if (Abs_real64 (y1 - y0) < kNearZero) |
54 | 0 | { |
55 | 0 | break; |
56 | 0 | } |
57 | | |
58 | 0 | real64 x2 = Pin_real64 (0.0, |
59 | 0 | x1 + (y - y1) * (x1 - x0) / (y1 - y0), |
60 | 0 | 1.0); |
61 | | |
62 | 0 | real64 y2 = Evaluate (x2); |
63 | | |
64 | 0 | x0 = x1; |
65 | 0 | y0 = y1; |
66 | | |
67 | 0 | x1 = x2; |
68 | 0 | y1 = y2; |
69 | | |
70 | 0 | } |
71 | | |
72 | 0 | return x1; |
73 | | |
74 | 0 | } |
75 | | |
76 | | /*****************************************************************************/ |
77 | | |
78 | | bool dng_1d_identity::IsIdentity () const |
79 | 0 | { |
80 | | |
81 | 0 | return true; |
82 | | |
83 | 0 | } |
84 | | |
85 | | /*****************************************************************************/ |
86 | | |
87 | | real64 dng_1d_identity::Evaluate (real64 x) const |
88 | 1.26M | { |
89 | | |
90 | 1.26M | return x; |
91 | | |
92 | 1.26M | } |
93 | | |
94 | | /*****************************************************************************/ |
95 | | |
96 | | real64 dng_1d_identity::EvaluateInverse (real64 x) const |
97 | 0 | { |
98 | | |
99 | 0 | return x; |
100 | | |
101 | 0 | } |
102 | | |
103 | | /*****************************************************************************/ |
104 | | |
105 | | const dng_1d_function & dng_1d_identity::Get () |
106 | 341 | { |
107 | | |
108 | 341 | static dng_1d_identity static_function; |
109 | | |
110 | 341 | return static_function; |
111 | | |
112 | 341 | } |
113 | | |
114 | | /*****************************************************************************/ |
115 | | |
116 | | dng_1d_concatenate::dng_1d_concatenate (const dng_1d_function &function1, |
117 | | const dng_1d_function &function2) |
118 | | |
119 | 8.69k | : fFunction1 (function1) |
120 | 8.69k | , fFunction2 (function2) |
121 | | |
122 | 8.69k | { |
123 | | |
124 | 8.69k | } |
125 | | |
126 | | /*****************************************************************************/ |
127 | | |
128 | | bool dng_1d_concatenate::IsIdentity () const |
129 | 0 | { |
130 | | |
131 | 0 | return fFunction1.IsIdentity () && |
132 | 0 | fFunction2.IsIdentity (); |
133 | | |
134 | 0 | } |
135 | | |
136 | | /*****************************************************************************/ |
137 | | |
138 | | real64 dng_1d_concatenate::Evaluate (real64 x) const |
139 | 35.6M | { |
140 | | |
141 | 35.6M | real64 y = Pin_real64 (0.0, fFunction1.Evaluate (x), 1.0); |
142 | | |
143 | 35.6M | return fFunction2.Evaluate (y); |
144 | | |
145 | 35.6M | } |
146 | | |
147 | | /*****************************************************************************/ |
148 | | |
149 | | real64 dng_1d_concatenate::EvaluateInverse (real64 x) const |
150 | 0 | { |
151 | | |
152 | 0 | real64 y = fFunction2.EvaluateInverse (x); |
153 | | |
154 | 0 | return fFunction1.EvaluateInverse (y); |
155 | | |
156 | 0 | } |
157 | | |
158 | | /*****************************************************************************/ |
159 | | |
160 | | dng_1d_inverse::dng_1d_inverse (const dng_1d_function &f) |
161 | | |
162 | 6 | : fFunction (f) |
163 | | |
164 | 6 | { |
165 | | |
166 | 6 | } |
167 | | |
168 | | /*****************************************************************************/ |
169 | | |
170 | | bool dng_1d_inverse::IsIdentity () const |
171 | 0 | { |
172 | | |
173 | 0 | return fFunction.IsIdentity (); |
174 | | |
175 | 0 | } |
176 | | |
177 | | /*****************************************************************************/ |
178 | | |
179 | | real64 dng_1d_inverse::Evaluate (real64 x) const |
180 | 24.5k | { |
181 | | |
182 | 24.5k | return fFunction.EvaluateInverse (x); |
183 | | |
184 | 24.5k | } |
185 | | |
186 | | /*****************************************************************************/ |
187 | | |
188 | | real64 dng_1d_inverse::EvaluateInverse (real64 y) const |
189 | 0 | { |
190 | | |
191 | 0 | return fFunction.Evaluate (y); |
192 | | |
193 | 0 | } |
194 | | |
195 | | /*****************************************************************************/ |