1 |
< |
/* Copyright (c) 1991 Regents of the University of California */ |
2 |
< |
|
3 |
< |
/* SCCSid "$SunId$ LBL" */ |
4 |
< |
|
1 |
> |
/* RCSid $Id$ */ |
2 |
|
/* |
3 |
|
* color.h - header for routines using pixel color values. |
4 |
|
* |
8 |
– |
* 12/31/85 |
9 |
– |
* |
5 |
|
* Two color representations are used, one for calculation and |
6 |
|
* another for storage. Calculation is done with three floats |
7 |
|
* for speed. Stored color values use 4 bytes which contain |
8 |
|
* three single byte mantissas and a common exponent. |
9 |
|
*/ |
10 |
+ |
#ifndef _RAD_COLOR_H_ |
11 |
+ |
#define _RAD_COLOR_H_ |
12 |
|
|
13 |
+ |
#include <stdlib.h> |
14 |
+ |
|
15 |
+ |
#ifdef __cplusplus |
16 |
+ |
extern "C" { |
17 |
+ |
#endif |
18 |
+ |
|
19 |
|
#define RED 0 |
20 |
|
#define GRN 1 |
21 |
|
#define BLU 2 |
22 |
< |
#define EXP 3 |
22 |
> |
#define CIEX 0 /* or, if input is XYZ... */ |
23 |
> |
#define CIEY 1 |
24 |
> |
#define CIEZ 2 |
25 |
> |
#define EXP 3 /* exponent same for either format */ |
26 |
|
#define COLXS 128 /* excess used for exponent */ |
27 |
+ |
#define WHT 3 /* used for RGBPRIMS type */ |
28 |
|
|
29 |
< |
typedef unsigned char BYTE; /* 8-bit unsigned integer */ |
29 |
> |
#undef uby8 |
30 |
> |
#define uby8 unsigned char /* 8-bit unsigned integer */ |
31 |
|
|
32 |
< |
typedef BYTE COLR[4]; /* red, green, blue, exponent */ |
32 |
> |
typedef uby8 COLR[4]; /* red, green, blue (or X,Y,Z), exponent */ |
33 |
|
|
34 |
+ |
typedef float COLORV; |
35 |
+ |
typedef COLORV COLOR[3]; /* red, green, blue (or X,Y,Z) */ |
36 |
+ |
|
37 |
+ |
typedef float RGBPRIMS[4][2]; /* (x,y) chromaticities for RGBW */ |
38 |
+ |
typedef float (*RGBPRIMP)[2]; /* pointer to RGBPRIMS array */ |
39 |
+ |
|
40 |
+ |
typedef float COLORMAT[3][3]; /* color coordinate conversion matrix */ |
41 |
+ |
|
42 |
|
#define copycolr(c1,c2) (c1[0]=c2[0],c1[1]=c2[1], \ |
43 |
|
c1[2]=c2[2],c1[3]=c2[3]) |
44 |
|
|
29 |
– |
typedef float COLOR[3]; /* red, green, blue */ |
30 |
– |
|
45 |
|
#define colval(col,pri) ((col)[pri]) |
46 |
|
|
47 |
|
#define setcolor(col,r,g,b) ((col)[RED]=(r),(col)[GRN]=(g),(col)[BLU]=(b)) |
61 |
|
#define CIE_y_g 0.710 |
62 |
|
#define CIE_x_b 0.140 |
63 |
|
#define CIE_y_b 0.080 |
64 |
< |
#define CIE_x_w 0.333 /* use true white */ |
65 |
< |
#define CIE_y_w 0.333 |
64 |
> |
#define CIE_x_w 0.3333 /* use true white */ |
65 |
> |
#define CIE_y_w 0.3333 |
66 |
|
#else |
67 |
|
#define CIE_x_r 0.640 /* nominal CRT primaries */ |
68 |
|
#define CIE_y_r 0.330 |
70 |
|
#define CIE_y_g 0.600 |
71 |
|
#define CIE_x_b 0.150 |
72 |
|
#define CIE_y_b 0.060 |
73 |
< |
#define CIE_x_w 0.333 /* use true white */ |
74 |
< |
#define CIE_y_w 0.333 |
73 |
> |
#define CIE_x_w 0.3333 /* use true white */ |
74 |
> |
#define CIE_y_w 0.3333 |
75 |
|
#endif |
76 |
|
|
77 |
+ |
#define STDPRIMS {{CIE_x_r,CIE_y_r},{CIE_x_g,CIE_y_g}, \ |
78 |
+ |
{CIE_x_b,CIE_y_b},{CIE_x_w,CIE_y_w}} |
79 |
+ |
|
80 |
|
#define CIE_D ( CIE_x_r*(CIE_y_g - CIE_y_b) + \ |
81 |
|
CIE_x_g*(CIE_y_b - CIE_y_r) + \ |
82 |
|
CIE_x_b*(CIE_y_r - CIE_y_g) ) |
97 |
|
#define CIE_gf (CIE_y_g*CIE_C_gD/CIE_D) |
98 |
|
#define CIE_bf (CIE_y_b*CIE_C_bD/CIE_D) |
99 |
|
|
100 |
+ |
/* As of 9-94, CIE_rf=.265074126, CIE_gf=.670114631 and CIE_bf=.064811243 */ |
101 |
+ |
|
102 |
+ |
/***** The following definitions are valid for RGB colors only... *****/ |
103 |
+ |
|
104 |
|
#define bright(col) (CIE_rf*(col)[RED]+CIE_gf*(col)[GRN]+CIE_bf*(col)[BLU]) |
105 |
|
#define normbright(c) ( ( (long)(CIE_rf*256.+.5)*(c)[RED] + \ |
106 |
|
(long)(CIE_gf*256.+.5)*(c)[GRN] + \ |
112 |
|
#define D65EFFICACY 203. /* standard illuminant D65 */ |
113 |
|
#define INCEFFICACY 160. /* illuminant A (incand.) */ |
114 |
|
#define SUNEFFICACY 208. /* illuminant B (solar dir.) */ |
115 |
< |
#define SKYEFFICACY D65EFFICACY /* skylight */ |
115 |
> |
#define SKYEFFICACY D65EFFICACY /* skylight (should be 110) */ |
116 |
|
#define DAYEFFICACY D65EFFICACY /* combined sky and solar */ |
117 |
|
|
118 |
|
#define luminance(col) (WHTEFFICACY * bright(col)) |
119 |
|
|
120 |
+ |
/***** ...end of stuff specific to RGB colors *****/ |
121 |
+ |
|
122 |
|
#define intens(col) ( (col)[0] > (col)[1] \ |
123 |
|
? (col)[0] > (col)[2] ? (col)[0] : (col)[2] \ |
124 |
|
: (col)[1] > (col)[2] ? (col)[1] : (col)[2] ) |
134 |
|
|
135 |
|
/* picture format identifier */ |
136 |
|
#define COLRFMT "32-bit_rle_rgbe" |
137 |
+ |
#define CIEFMT "32-bit_rle_xyze" |
138 |
+ |
#define PICFMT "32-bit_rle_???e" /* matches either */ |
139 |
+ |
#define LPICFMT 15 /* max format id len */ |
140 |
|
|
141 |
|
/* macros for exposures */ |
142 |
|
#define EXPOSSTR "EXPOSURE=" |
152 |
|
#define aspectval(hl) atof((hl)+LASPECTSTR) |
153 |
|
#define fputaspect(pa,fp) fprintf(fp,"%s%f\n",ASPECTSTR,pa) |
154 |
|
|
155 |
+ |
/* macros for primary specifications */ |
156 |
+ |
#define PRIMARYSTR "PRIMARIES=" |
157 |
+ |
#define LPRIMARYSTR 10 |
158 |
+ |
#define isprims(hl) (!strncmp(hl,PRIMARYSTR,LPRIMARYSTR)) |
159 |
+ |
#define primsval(p,hl) (sscanf((hl)+LPRIMARYSTR, \ |
160 |
+ |
"%f %f %f %f %f %f %f %f", \ |
161 |
+ |
&(p)[RED][CIEX],&(p)[RED][CIEY], \ |
162 |
+ |
&(p)[GRN][CIEX],&(p)[GRN][CIEY], \ |
163 |
+ |
&(p)[BLU][CIEX],&(p)[BLU][CIEY], \ |
164 |
+ |
&(p)[WHT][CIEX],&(p)[WHT][CIEY]) == 8) |
165 |
+ |
#define fputprims(p,fp) fprintf(fp, \ |
166 |
+ |
"%s %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f\n",\ |
167 |
+ |
PRIMARYSTR, \ |
168 |
+ |
(p)[RED][CIEX],(p)[RED][CIEY], \ |
169 |
+ |
(p)[GRN][CIEX],(p)[GRN][CIEY], \ |
170 |
+ |
(p)[BLU][CIEX],(p)[BLU][CIEY], \ |
171 |
+ |
(p)[WHT][CIEX],(p)[WHT][CIEY]) |
172 |
+ |
|
173 |
|
/* macros for color correction */ |
174 |
|
#define COLCORSTR "COLORCORR=" |
175 |
|
#define LCOLCORSTR 10 |
176 |
|
#define iscolcor(hl) (!strncmp(hl,COLCORSTR,LCOLCORSTR)) |
177 |
< |
#define colcorval(cc,hl) sscanf(hl+LCOLCORSTR,"%f %f %f", \ |
177 |
> |
#define colcorval(cc,hl) sscanf((hl)+LCOLCORSTR,"%f %f %f", \ |
178 |
|
&(cc)[RED],&(cc)[GRN],&(cc)[BLU]) |
179 |
|
#define fputcolcor(cc,fp) fprintf(fp,"%s %f %f %f\n",COLCORSTR, \ |
180 |
|
(cc)[RED],(cc)[GRN],(cc)[BLU]) |
181 |
|
|
182 |
< |
#ifdef DCL_ATOF |
183 |
< |
extern double atof(), ldexp(), frexp(); |
182 |
> |
/* |
183 |
> |
* Conversions to and from XYZ space generally don't apply WHTEFFICACY. |
184 |
> |
* If you need Y to be luminance (cd/m^2), this must be applied when |
185 |
> |
* converting from radiance (watts/sr/m^2). |
186 |
> |
*/ |
187 |
> |
|
188 |
> |
extern RGBPRIMS stdprims; /* standard primary chromaticities */ |
189 |
> |
extern COLORMAT rgb2xyzmat; /* RGB to XYZ conversion matrix */ |
190 |
> |
extern COLORMAT xyz2rgbmat; /* XYZ to RGB conversion matrix */ |
191 |
> |
extern COLOR cblack, cwhite; /* black (0,0,0) and white (1,1,1) */ |
192 |
> |
|
193 |
> |
#define CGAMUT_LOWER 01 |
194 |
> |
#define CGAMUT_UPPER 02 |
195 |
> |
#define CGAMUT (CGAMUT_LOWER|CGAMUT_UPPER) |
196 |
> |
|
197 |
> |
#define rgb_cie(xyz,rgb) colortrans(xyz,rgb2xyzmat,rgb) |
198 |
> |
|
199 |
> |
#define cpcolormat(md,ms) memcpy((void *)md,(void *)ms,sizeof(COLORMAT)) |
200 |
> |
|
201 |
> |
/* defined in color.c */ |
202 |
> |
extern char *tempbuffer(unsigned int len); |
203 |
> |
extern int fwritecolrs(COLR *scanline, int len, FILE *fp); |
204 |
> |
extern int freadcolrs(COLR *scanline, int len, FILE *fp); |
205 |
> |
extern int fwritescan(COLOR *scanline, int len, FILE *fp); |
206 |
> |
extern int freadscan(COLOR *scanline, int len, FILE *fp); |
207 |
> |
extern void setcolr(COLR clr, double r, double g, double b); |
208 |
> |
extern void colr_color(COLOR col, COLR clr); |
209 |
> |
extern int bigdiff(COLOR c1, COLOR c2, double md); |
210 |
> |
/* defined in spec_rgb.c */ |
211 |
> |
extern void spec_rgb(COLOR col, int s, int e); |
212 |
> |
extern void spec_cie(COLOR col, int s, int e); |
213 |
> |
extern void cie_rgb(COLOR rgb, COLOR xyz); |
214 |
> |
extern int clipgamut(COLOR col, double brt, int gamut, |
215 |
> |
COLOR lower, COLOR upper); |
216 |
> |
extern void colortrans(COLOR c2, COLORMAT mat, COLOR c1); |
217 |
> |
extern void multcolormat(COLORMAT m3, COLORMAT m2, |
218 |
> |
COLORMAT m1); |
219 |
> |
extern int colorprimsOK(RGBPRIMS pr); |
220 |
> |
extern int compxyz2rgbmat(COLORMAT mat, RGBPRIMS pr); |
221 |
> |
extern int comprgb2xyzmat(COLORMAT mat, RGBPRIMS pr); |
222 |
> |
extern int comprgb2rgbmat(COLORMAT mat, RGBPRIMS pr1, RGBPRIMS pr2); |
223 |
> |
extern int compxyzWBmat(COLORMAT mat, float wht1[2], |
224 |
> |
float wht2[2]); |
225 |
> |
extern int compxyz2rgbWBmat(COLORMAT mat, RGBPRIMS pr); |
226 |
> |
extern int comprgb2xyzWBmat(COLORMAT mat, RGBPRIMS pr); |
227 |
> |
extern int comprgb2rgbWBmat(COLORMAT mat, RGBPRIMS pr1, RGBPRIMS pr2); |
228 |
> |
/* defined in colrops.c */ |
229 |
> |
extern int setcolrcor(double (*f)(double, double), double a2); |
230 |
> |
extern int setcolrinv(double (*f)(double, double), double a2); |
231 |
> |
extern int setcolrgam(double g); |
232 |
> |
extern int colrs_gambs(COLR *scan, int len); |
233 |
> |
extern int gambs_colrs(COLR *scan, int len); |
234 |
> |
extern void shiftcolrs(COLR *scan, int len, int adjust); |
235 |
> |
extern void normcolrs(COLR *scan, int len, int adjust); |
236 |
> |
|
237 |
> |
|
238 |
> |
#ifdef __cplusplus |
239 |
> |
} |
240 |
|
#endif |
241 |
+ |
#endif /* _RAD_COLOR_H_ */ |
242 |
+ |
|