1 /* 2 Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization 3 dedicated to making software imaging solutions freely available. 4 5 You may not use this file except in compliance with the License. 6 obtain a copy of the License at 7 8 http://www.imagemagick.org/script/license.php 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 16 MagickCore private graphic gems methods. 17 */ 18 #ifndef MAGICKCORE_GEM_PRIVATE_H 19 #define MAGICKCORE_GEM_PRIVATE_H 20 21 #include "MagickCore/pixel-accessor.h" 22 23 #if defined(__cplusplus) || defined(c_plusplus) 24 extern "C" { 25 #endif 26 27 #define D65X 0.950456 28 #define D65Y 1.0 29 #define D65Z 1.088754 30 #define CIEEpsilon (216.0/24389.0) 31 #define CIEK (24389.0/27.0) 32 33 extern MagickPrivate double 34 GenerateDifferentialNoise(RandomInfo *,const Quantum,const NoiseType, 35 const double); 36 37 extern MagickPrivate size_t 38 GetOptimalKernelWidth(const double,const double), 39 GetOptimalKernelWidth1D(const double,const double), 40 GetOptimalKernelWidth2D(const double,const double); 41 42 extern MagickPrivate void 43 ConvertHCLToRGB(const double,const double,const double,double *,double *, 44 double *), 45 ConvertHCLpToRGB(const double,const double,const double,double *,double *, 46 double *), 47 ConvertHSBToRGB(const double,const double,const double,double *,double *, 48 double *), 49 ConvertHSIToRGB(const double,const double,const double,double *,double *, 50 double *), 51 ConvertHSVToRGB(const double,const double,const double,double *,double *, 52 double *), 53 ConvertHWBToRGB(const double,const double,const double,double *,double *, 54 double *), 55 ConvertLCHabToRGB(const double,const double,const double,double *,double *, 56 double *), 57 ConvertLCHuvToRGB(const double,const double,const double,double *,double *, 58 double *), 59 ConvertRGBToHCL(const double,const double,const double,double *,double *, 60 double *), 61 ConvertRGBToHCLp(const double,const double,const double,double *,double *, 62 double *), 63 ConvertRGBToHSB(const double,const double,const double,double *,double *, 64 double *), 65 ConvertRGBToHSI(const double,const double,const double,double *,double *, 66 double *), 67 ConvertRGBToHSV(const double,const double,const double,double *,double *, 68 double *), 69 ConvertRGBToHWB(const double,const double,const double,double *,double *, 70 double *), 71 ConvertRGBToLCHab(const double,const double,const double,double *,double *, 72 double *), 73 ConvertRGBToLCHuv(const double,const double,const double,double *,double *, 74 double *); 75 76 static inline void ConvertLabToXYZ(const double L,const double a,const double b, 77 double *X,double *Y,double *Z) 78 { 79 double 80 x, 81 y, 82 z; 83 84 assert(X != (double *) NULL); 85 assert(Y != (double *) NULL); 86 assert(Z != (double *) NULL); 87 y=(L+16.0)/116.0; 88 x=y+a/500.0; 89 z=y-b/200.0; 90 if ((x*x*x) > CIEEpsilon) 91 x=(x*x*x); 92 else 93 x=(116.0*x-16.0)/CIEK; 94 if ((y*y*y) > CIEEpsilon) 95 y=(y*y*y); 96 else 97 y=L/CIEK; 98 if ((z*z*z) > CIEEpsilon) 99 z=(z*z*z); 100 else 101 z=(116.0*z-16.0)/CIEK; 102 *X=D65X*x; 103 *Y=D65Y*y; 104 *Z=D65Z*z; 105 } 106 107 static inline void ConvertLuvToXYZ(const double L,const double u,const double v, 108 double *X,double *Y,double *Z) 109 { 110 assert(X != (double *) NULL); 111 assert(Y != (double *) NULL); 112 assert(Z != (double *) NULL); 113 if (L > (CIEK*CIEEpsilon)) 114 *Y=(double) pow((L+16.0)/116.0,3.0); 115 else 116 *Y=L/CIEK; 117 *X=((*Y*((39.0*L/(v+13.0*L*(9.0*D65Y/(D65X+15.0*D65Y+3.0*D65Z))))-5.0))+ 118 5.0*(*Y))/((((52.0*L/(u+13.0*L*(4.0*D65X/(D65X+15.0*D65Y+3.0*D65Z))))-1.0)/ 119 3.0)-(-1.0/3.0)); 120 *Z=(*X*(((52.0*L/(u+13.0*L*(4.0*D65X/(D65X+15.0*D65Y+3.0*D65Z))))-1.0)/3.0))- 121 5.0*(*Y); 122 } 123 124 static inline void ConvertRGBToXYZ(const double red,const double green, 125 const double blue,double *X,double *Y,double *Z) 126 { 127 double 128 b, 129 g, 130 r; 131 132 /* 133 Convert RGB to XYZ colorspace. 134 */ 135 assert(X != (double *) NULL); 136 assert(Y != (double *) NULL); 137 assert(Z != (double *) NULL); 138 r=QuantumScale*DecodePixelGamma(red); 139 g=QuantumScale*DecodePixelGamma(green); 140 b=QuantumScale*DecodePixelGamma(blue); 141 *X=0.4124564*r+0.3575761*g+0.1804375*b; 142 *Y=0.2126729*r+0.7151522*g+0.0721750*b; 143 *Z=0.0193339*r+0.1191920*g+0.9503041*b; 144 } 145 146 static inline void ConvertXYZToLab(const double X,const double Y,const double Z, 147 double *L,double *a,double *b) 148 { 149 double 150 x, 151 y, 152 z; 153 154 assert(L != (double *) NULL); 155 assert(a != (double *) NULL); 156 assert(b != (double *) NULL); 157 if ((X/D65X) > CIEEpsilon) 158 x=pow(X/D65X,1.0/3.0); 159 else 160 x=(CIEK*X/D65X+16.0)/116.0; 161 if ((Y/D65Y) > CIEEpsilon) 162 y=pow(Y/D65Y,1.0/3.0); 163 else 164 y=(CIEK*Y/D65Y+16.0)/116.0; 165 if ((Z/D65Z) > CIEEpsilon) 166 z=pow(Z/D65Z,1.0/3.0); 167 else 168 z=(CIEK*Z/D65Z+16.0)/116.0; 169 *L=((116.0*y)-16.0)/100.0; 170 *a=(500.0*(x-y))/255.0+0.5; 171 *b=(200.0*(y-z))/255.0+0.5; 172 } 173 174 static inline void ConvertXYZToLuv(const double X,const double Y,const double Z, 175 double *L,double *u,double *v) 176 { 177 double 178 alpha; 179 180 assert(L != (double *) NULL); 181 assert(u != (double *) NULL); 182 assert(v != (double *) NULL); 183 if ((Y/D65Y) > CIEEpsilon) 184 *L=(double) (116.0*pow(Y/D65Y,1.0/3.0)-16.0); 185 else 186 *L=CIEK*(Y/D65Y); 187 alpha=PerceptibleReciprocal(X+15.0*Y+3.0*Z); 188 *u=13.0*(*L)*((4.0*alpha*X)-(4.0*D65X/(D65X+15.0*D65Y+3.0*D65Z))); 189 *v=13.0*(*L)*((9.0*alpha*Y)-(9.0*D65Y/(D65X+15.0*D65Y+3.0*D65Z))); 190 *L/=100.0; 191 *u=(*u+134.0)/354.0; 192 *v=(*v+140.0)/262.0; 193 } 194 195 static inline void ConvertXYZToRGB(const double X,const double Y,const double Z, 196 double *red,double *green,double *blue) 197 { 198 double 199 b, 200 g, 201 r; 202 203 assert(red != (double *) NULL); 204 assert(green != (double *) NULL); 205 assert(blue != (double *) NULL); 206 r=3.2404542*X-1.5371385*Y-0.4985314*Z; 207 g=(-0.9692660)*X+1.8760108*Y+0.0415560*Z; 208 b=0.0556434*X-0.2040259*Y+1.0572252*Z; 209 *red=EncodePixelGamma(QuantumRange*r); 210 *green=EncodePixelGamma(QuantumRange*g); 211 *blue=EncodePixelGamma(QuantumRange*b); 212 } 213 214 #if defined(__cplusplus) || defined(c_plusplus) 215 } 216 #endif 217 218 #endif 219
