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_color_space.h#2 $ */ 10 /* $DateTime: 2012/07/11 10:36:56 $ */ 11 /* $Change: 838485 $ */ 12 /* $Author: tknoll $ */ 13 14 /** \file 15 * Standard gamma functions and color spaces used within the DNG SDK. 16 */ 17 18 #ifndef __dng_color_space__ 19 #define __dng_color_space__ 20 21 /*****************************************************************************/ 22 23 #include "dng_1d_function.h" 24 #include "dng_classes.h" 25 #include "dng_matrix.h" 26 #include "dng_types.h" 27 28 /*****************************************************************************/ 29 30 /// \brief A dng_1d_function for gamma encoding in sRGB color space 31 32 class dng_function_GammaEncode_sRGB: public dng_1d_function 33 { 34 35 public: 36 37 virtual real64 Evaluate (real64 x) const; 38 39 virtual real64 EvaluateInverse (real64 y) const; 40 41 static const dng_1d_function & Get (); 42 43 }; 44 45 /*****************************************************************************/ 46 47 /// \brief A dng_1d_function for gamma encoding with 1.8 gamma. 48 49 class dng_function_GammaEncode_1_8: public dng_1d_function 50 { 51 52 public: 53 54 virtual real64 Evaluate (real64 x) const; 55 56 virtual real64 EvaluateInverse (real64 y) const; 57 58 static const dng_1d_function & Get (); 59 60 }; 61 62 /*****************************************************************************/ 63 64 /// \brief A dng_1d_function for gamma encoding with 2.2 gamma. 65 66 class dng_function_GammaEncode_2_2: public dng_1d_function 67 { 68 69 public: 70 71 virtual real64 Evaluate (real64 x) const; 72 73 virtual real64 EvaluateInverse (real64 y) const; 74 75 static const dng_1d_function & Get (); 76 77 }; 78 79 /*****************************************************************************/ 80 81 /// \brief An abstract color space 82 83 class dng_color_space 84 { 85 86 protected: 87 88 dng_matrix fMatrixToPCS; 89 90 dng_matrix fMatrixFromPCS; 91 92 public: 93 94 virtual ~dng_color_space (); 95 96 /// Return a matrix which transforms source data in this color space into the 97 /// Profile Connection Space. 98 99 const dng_matrix & MatrixToPCS () const 100 { 101 return fMatrixToPCS; 102 } 103 104 /// Return a matrix which transforms Profile Connection Space data into this 105 /// color space. 106 107 const dng_matrix & MatrixFromPCS () const 108 { 109 return fMatrixFromPCS; 110 } 111 112 /// Predicate which is true if this color space is monochrome (has only a 113 /// single column). 114 115 bool IsMonochrome () const 116 { 117 return fMatrixToPCS.Cols () == 1; 118 } 119 120 /// Getter for the gamma function for this color space. 121 122 virtual const dng_1d_function & GammaFunction () const; 123 124 /// Returns true if this color space is linear. (I.e. has gamma 1.0.) 125 126 bool IsLinear () const 127 { 128 return GammaFunction ().IsIdentity (); 129 } 130 131 /// Map an input value through this color space's encoding gamma. 132 133 real64 GammaEncode (real64 x) const 134 { 135 return GammaFunction ().Evaluate (x); 136 } 137 138 /// Map an input value through this color space's decoding gamma (inverse of 139 /// the encoding gamma). 140 141 real64 GammaDecode (real64 y) const 142 { 143 return GammaFunction ().EvaluateInverse (y); 144 } 145 146 /// Getter for ICC profile, if this color space has one. 147 /// \param size Out parameter which receives size on return. 148 /// \param data Receives bytes of profile. 149 /// \retval Returns true if this color space has an ICC profile, false otherwise. 150 151 virtual bool ICCProfile (uint32 &size, 152 const uint8 *&data) const; 153 154 protected: 155 156 dng_color_space (); 157 158 void SetMonochrome (); 159 160 void SetMatrixToPCS (const dng_matrix_3by3 &M); 161 162 }; 163 164 /*****************************************************************************/ 165 166 /// Singleton class for sRGB color space. 167 168 class dng_space_sRGB: public dng_color_space 169 { 170 171 protected: 172 173 dng_space_sRGB (); 174 175 public: 176 177 /// Returns dng_function_GammaEncode_sRGB 178 179 virtual const dng_1d_function & GammaFunction () const; 180 181 /// Returns sRGB IEC61966-2.1 ICC profile 182 183 virtual bool ICCProfile (uint32 &size, 184 const uint8 *&data) const; 185 186 /// Static method for getting single global instance of this color space. 187 188 static const dng_color_space & Get (); 189 190 }; 191 192 /*****************************************************************************/ 193 194 /// \brief Singleton class for AdobeRGB color space. 195 196 class dng_space_AdobeRGB: public dng_color_space 197 { 198 199 protected: 200 201 dng_space_AdobeRGB (); 202 203 public: 204 205 /// Returns dng_function_GammaEncode_1_8 206 207 virtual const dng_1d_function & GammaFunction () const; 208 209 /// Returns AdobeRGB (1998) ICC profile 210 211 virtual bool ICCProfile (uint32 &size, 212 const uint8 *&data) const; 213 214 /// Static method for getting single global instance of this color space. 215 216 static const dng_color_space & Get (); 217 218 }; 219 220 /*****************************************************************************/ 221 222 /// \brief Singleton class for ColorMatch color space. 223 224 class dng_space_ColorMatch: public dng_color_space 225 { 226 227 protected: 228 229 dng_space_ColorMatch (); 230 231 public: 232 233 /// Returns dng_function_GammaEncode_1_8 234 235 virtual const dng_1d_function & GammaFunction () const; 236 237 /// Returns ColorMatch RGB ICC profile 238 239 virtual bool ICCProfile (uint32 &size, 240 const uint8 *&data) const; 241 242 /// Static method for getting single global instance of this color space. 243 244 static const dng_color_space & Get (); 245 246 }; 247 248 /*****************************************************************************/ 249 250 /// \brief Singleton class for ProPhoto RGB color space. 251 252 class dng_space_ProPhoto: public dng_color_space 253 { 254 255 protected: 256 257 dng_space_ProPhoto (); 258 259 public: 260 261 /// Returns dng_function_GammaEncode_1_8 262 263 virtual const dng_1d_function & GammaFunction () const; 264 265 /// Returns ProPhoto RGB ICC profile 266 267 virtual bool ICCProfile (uint32 &size, 268 const uint8 *&data) const; 269 270 /// Static method for getting single global instance of this color space. 271 272 static const dng_color_space & Get (); 273 274 }; 275 276 /*****************************************************************************/ 277 278 /// \brief Singleton class for gamma 1.8 grayscale color space. 279 280 class dng_space_GrayGamma18: public dng_color_space 281 { 282 283 protected: 284 285 dng_space_GrayGamma18 (); 286 287 public: 288 289 /// Returns dng_function_GammaEncode_1_8 290 291 virtual const dng_1d_function & GammaFunction () const; 292 293 /// Returns simple grayscale gamma 1.8 ICC profile 294 295 virtual bool ICCProfile (uint32 &size, 296 const uint8 *&data) const; 297 298 /// Static method for getting single global instance of this color space. 299 300 static const dng_color_space & Get (); 301 302 }; 303 304 /*****************************************************************************/ 305 306 /// \brief Singleton class for gamma 2.2 grayscale color space. 307 308 class dng_space_GrayGamma22: public dng_color_space 309 { 310 311 protected: 312 313 dng_space_GrayGamma22 (); 314 315 public: 316 317 /// Returns dng_function_GammaEncode_2_2 318 319 virtual const dng_1d_function & GammaFunction () const; 320 321 /// Returns simple grayscale gamma 2.2 ICC profile 322 323 virtual bool ICCProfile (uint32 &size, 324 const uint8 *&data) const; 325 326 /// Static method for getting single global instance of this color space. 327 328 static const dng_color_space & Get (); 329 330 }; 331 332 /*****************************************************************************/ 333 334 class dng_space_fakeRGB: public dng_color_space 335 { 336 337 protected: 338 339 dng_space_fakeRGB (); 340 341 public: 342 343 static const dng_color_space & Get (); 344 345 }; 346 347 /*****************************************************************************/ 348 349 #endif 350 351 /*****************************************************************************/ 352
