2 Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization
3 dedicated to making software imaging solutions freely available.
5 You may not use this file except in compliance with the License.
6 obtain a copy of the License at
8 http://www.imagemagick.org/script/license.php
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.
16 MagickCore private graphic gems methods.
18 #ifndef _MAGICKCORE_GEM_PRIVATE_H
19 #define _MAGICKCORE_GEM_PRIVATE_H
21 #if defined(__cplusplus) || defined(c_plusplus)
25 #include "MagickCore/pixel-private.h"
30 #define CIEEpsilon (216.0/24389.0)
31 #define CIEK (24389.0/27.0)
33 extern MagickPrivate double
34 GenerateDifferentialNoise(RandomInfo *,const Quantum,const NoiseType,
37 extern MagickPrivate size_t
38 GetOptimalKernelWidth(const double,const double),
39 GetOptimalKernelWidth1D(const double,const double),
40 GetOptimalKernelWidth2D(const double,const double);
42 extern MagickPrivate void
43 ConvertHCLToRGB(const double,const double,const double,double *,double *,
45 ConvertHCLpToRGB(const double,const double,const double,double *,double *,
47 ConvertHSBToRGB(const double,const double,const double,double *,double *,
49 ConvertHSIToRGB(const double,const double,const double,double *,double *,
51 ConvertHSVToRGB(const double,const double,const double,double *,double *,
53 ConvertHWBToRGB(const double,const double,const double,double *,double *,
55 ConvertLCHabToRGB(const double,const double,const double,double *,double *,
57 ConvertLCHuvToRGB(const double,const double,const double,double *,double *,
59 ConvertRGBToHCL(const double,const double,const double,double *,double *,
61 ConvertRGBToHCLp(const double,const double,const double,double *,double *,
63 ConvertRGBToHSB(const double,const double,const double,double *,double *,
65 ConvertRGBToHSI(const double,const double,const double,double *,double *,
67 ConvertRGBToHSV(const double,const double,const double,double *,double *,
69 ConvertRGBToHWB(const double,const double,const double,double *,double *,
71 ConvertRGBToLCHab(const double,const double,const double,double *,double *,
73 ConvertRGBToLCHuv(const double,const double,const double,double *,double *,
76 static inline void ConvertLabToXYZ(const double L,const double a,const double b,
77 double *X,double *Y,double *Z)
84 assert(X != (double *) NULL);
85 assert(Y != (double *) NULL);
86 assert(Z != (double *) NULL);
87 y=(100.0*L+16.0)/116.0;
88 x=y+255.0*(a-0.5)/500.0;
89 z=y-255.0*(b-0.5)/200.0;
90 if ((x*x*x) > CIEEpsilon)
93 x=(116.0*x-16.0)/CIEK;
94 if ((y*y*y) > CIEEpsilon)
98 if ((z*z*z) > CIEEpsilon)
101 z=(116.0*z-16.0)/CIEK;
107 static inline void ConvertLuvToXYZ(const double L,const double u,const double v,
108 double *X,double *Y,double *Z)
110 assert(X != (double *) NULL);
111 assert(Y != (double *) NULL);
112 assert(Z != (double *) NULL);
113 if ((100.0*L) > (CIEK*CIEEpsilon))
114 *Y=(double) pow(((100.0*L)+16.0)/116.0,3.0);
117 *X=((*Y*((39.0*(100.0*L)/((262.0*v-140.0)+13.0*(100.0*L)*(9.0*D65Y/
118 (D65X+15.0*D65Y+3.0*D65Z))))-5.0))+5.0*(*Y))/((((52.0f*(100.0*L)/
119 ((354.0*u-134.0)+13.0*(100.0*L)*(4.0*D65X/(D65X+15.0*D65Y+3.0*
120 D65Z))))-1.0f)/3.0)-(-1.0f/3.0));
121 *Z=(*X*(((52.0f*(100.0*L)/((354.0*u-134.0)+13.0*(100.0*L)*(4.0*D65X/
122 (D65X+15.0*D65Y+3.0*D65Z))))-1.0f)/3.0))-5.0*(*Y);
125 static inline void ConvertRGBToXYZ(const double red,const double green,
126 const double blue,double *X,double *Y,double *Z)
133 assert(X != (double *) NULL);
134 assert(Y != (double *) NULL);
135 assert(Z != (double *) NULL);
137 g=QuantumScale*green;
139 *X=0.41239558896741421610*r+0.35758343076371481710*g+0.18049264738170157350*b;
140 *Y=0.21258623078559555160*r+0.71517030370341084990*g+0.07220049864333622685*b;
141 *Z=0.01929721549174694484*r+0.11918386458084853180*g+0.95049712513157976600*b;
144 static inline void ConvertXYZToLab(const double X,const double Y,const double Z,
145 double *L,double *a,double *b)
151 assert(L != (double *) NULL);
152 assert(a != (double *) NULL);
153 assert(b != (double *) NULL);
154 if ((X/D65X) > CIEEpsilon)
155 x=pow(X/D65X,1.0/3.0);
157 x=(CIEK*X/D65X+16.0)/116.0;
158 if ((Y/D65Y) > CIEEpsilon)
159 y=pow(Y/D65Y,1.0/3.0);
161 y=(CIEK*Y/D65Y+16.0)/116.0;
162 if ((Z/D65Z) > CIEEpsilon)
163 z=pow(Z/D65Z,1.0/3.0);
165 z=(CIEK*Z/D65Z+16.0)/116.0;
166 *L=((116.0*y)-16.0)/100.0;
167 *a=(500.0*(x-y))/255.0+0.5;
168 *b=(200.0*(y-z))/255.0+0.5;
171 static inline void ConvertXYZToLuv(const double X,const double Y,const double Z,
172 double *L,double *u,double *v)
177 assert(L != (double *) NULL);
178 assert(u != (double *) NULL);
179 assert(v != (double *) NULL);
180 if ((Y/D65Y) > CIEEpsilon)
181 *L=(double) (116.0*pow(Y/D65Y,1.0/3.0)-16.0);
184 alpha=PerceptibleReciprocal(X+15.0*Y+3.0*Z);
185 *u=13.0*(*L)*((4.0*alpha*X)-(4.0*D65X/(D65X+15.0*D65Y+3.0*D65Z)));
186 *v=13.0*(*L)*((9.0*alpha*Y)-(9.0*D65Y/(D65X+15.0*D65Y+3.0*D65Z)));
192 static inline void ConvertXYZToRGB(const double x,const double y,const double z,
193 double *red,double *green,double *blue)
201 Convert XYZ to RGB colorspace.
203 assert(red != (double *) NULL);
204 assert(green != (double *) NULL);
205 assert(blue != (double *) NULL);
206 r=3.2406*x-1.5372*y-0.4986*z;
207 g=(-0.9689*x+1.8758*y+0.0415*z);
208 b=0.0557*x-0.2040*y+1.0570*z;
210 *green=QuantumRange*g;
211 *blue=QuantumRange*b;
215 #if defined(__cplusplus) || defined(c_plusplus)