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 |
|
* |
5 |
< |
* 12/31/85 |
5 |
> |
* Must be included after X11 headers, since they declare a BYTE type. |
6 |
|
* |
7 |
|
* Two color representations are used, one for calculation and |
8 |
|
* another for storage. Calculation is done with three floats |
9 |
|
* for speed. Stored color values use 4 bytes which contain |
10 |
|
* three single byte mantissas and a common exponent. |
11 |
|
*/ |
12 |
+ |
#ifndef _RAD_COLOR_H_ |
13 |
+ |
#define _RAD_COLOR_H_ |
14 |
+ |
#ifdef __cplusplus |
15 |
+ |
extern "C" { |
16 |
+ |
#endif |
17 |
|
|
18 |
+ |
|
19 |
+ |
#include "copyright.h" |
20 |
+ |
|
21 |
+ |
#include <stdio.h> |
22 |
+ |
#include <stdlib.h> |
23 |
+ |
|
24 |
|
#define RED 0 |
25 |
|
#define GRN 1 |
26 |
|
#define BLU 2 |
27 |
< |
#define EXP 3 |
27 |
> |
#define CIEX 0 /* or, if input is XYZ... */ |
28 |
> |
#define CIEY 1 |
29 |
> |
#define CIEZ 2 |
30 |
> |
#define EXP 3 /* exponent same for either format */ |
31 |
|
#define COLXS 128 /* excess used for exponent */ |
32 |
+ |
#define WHT 3 /* used for RGBPRIMS type */ |
33 |
|
|
34 |
< |
typedef unsigned char BYTE; /* 8-bit unsigned integer */ |
34 |
> |
#undef BYTE |
35 |
> |
#define BYTE unsigned char /* 8-bit unsigned integer */ |
36 |
|
|
37 |
< |
typedef BYTE COLR[4]; /* red, green, blue, exponent */ |
37 |
> |
typedef BYTE COLR[4]; /* red, green, blue (or X,Y,Z), exponent */ |
38 |
|
|
39 |
+ |
typedef float COLOR[3]; /* red, green, blue (or X,Y,Z) */ |
40 |
+ |
|
41 |
+ |
typedef float RGBPRIMS[4][2]; /* (x,y) chromaticities for RGBW */ |
42 |
+ |
typedef float (*RGBPRIMP)[2]; /* pointer to RGBPRIMS array */ |
43 |
+ |
|
44 |
+ |
typedef float COLORMAT[3][3]; /* color coordinate conversion matrix */ |
45 |
+ |
|
46 |
|
#define copycolr(c1,c2) (c1[0]=c2[0],c1[1]=c2[1], \ |
47 |
|
c1[2]=c2[2],c1[3]=c2[3]) |
48 |
|
|
29 |
– |
typedef float COLOR[3]; /* red, green, blue */ |
30 |
– |
|
49 |
|
#define colval(col,pri) ((col)[pri]) |
50 |
|
|
51 |
|
#define setcolor(col,r,g,b) ((col)[RED]=(r),(col)[GRN]=(g),(col)[BLU]=(b)) |
59 |
|
#define multcolor(c1,c2) ((c1)[0]*=(c2)[0],(c1)[1]*=(c2)[1],(c1)[2]*=(c2)[2]) |
60 |
|
|
61 |
|
#ifdef NTSC |
62 |
< |
#define bright(col) (.295*(col)[RED]+.636*(col)[GRN]+.070*(col)[BLU]) |
63 |
< |
#define normbright(c) (int)((74L*(c)[RED]+164L*(c)[GRN]+18L*(c)[BLU])/256) |
62 |
> |
#define CIE_x_r 0.670 /* standard NTSC primaries */ |
63 |
> |
#define CIE_y_r 0.330 |
64 |
> |
#define CIE_x_g 0.210 |
65 |
> |
#define CIE_y_g 0.710 |
66 |
> |
#define CIE_x_b 0.140 |
67 |
> |
#define CIE_y_b 0.080 |
68 |
> |
#define CIE_x_w 0.3333 /* use true white */ |
69 |
> |
#define CIE_y_w 0.3333 |
70 |
|
#else |
71 |
< |
#define bright(col) (.263*(col)[RED]+.655*(col)[GRN]+.082*(col)[BLU]) |
72 |
< |
#define normbright(c) (int)((67L*(c)[RED]+168L*(c)[GRN]+21L*(c)[BLU])/256) |
71 |
> |
#define CIE_x_r 0.640 /* nominal CRT primaries */ |
72 |
> |
#define CIE_y_r 0.330 |
73 |
> |
#define CIE_x_g 0.290 |
74 |
> |
#define CIE_y_g 0.600 |
75 |
> |
#define CIE_x_b 0.150 |
76 |
> |
#define CIE_y_b 0.060 |
77 |
> |
#define CIE_x_w 0.3333 /* use true white */ |
78 |
> |
#define CIE_y_w 0.3333 |
79 |
|
#endif |
80 |
|
|
81 |
+ |
#define STDPRIMS {{CIE_x_r,CIE_y_r},{CIE_x_g,CIE_y_g}, \ |
82 |
+ |
{CIE_x_b,CIE_y_b},{CIE_x_w,CIE_y_w}} |
83 |
+ |
|
84 |
+ |
#define CIE_D ( CIE_x_r*(CIE_y_g - CIE_y_b) + \ |
85 |
+ |
CIE_x_g*(CIE_y_b - CIE_y_r) + \ |
86 |
+ |
CIE_x_b*(CIE_y_r - CIE_y_g) ) |
87 |
+ |
#define CIE_C_rD ( (1./CIE_y_w) * \ |
88 |
+ |
( CIE_x_w*(CIE_y_g - CIE_y_b) - \ |
89 |
+ |
CIE_y_w*(CIE_x_g - CIE_x_b) + \ |
90 |
+ |
CIE_x_g*CIE_y_b - CIE_x_b*CIE_y_g ) ) |
91 |
+ |
#define CIE_C_gD ( (1./CIE_y_w) * \ |
92 |
+ |
( CIE_x_w*(CIE_y_b - CIE_y_r) - \ |
93 |
+ |
CIE_y_w*(CIE_x_b - CIE_x_r) - \ |
94 |
+ |
CIE_x_r*CIE_y_b + CIE_x_b*CIE_y_r ) ) |
95 |
+ |
#define CIE_C_bD ( (1./CIE_y_w) * \ |
96 |
+ |
( CIE_x_w*(CIE_y_r - CIE_y_g) - \ |
97 |
+ |
CIE_y_w*(CIE_x_r - CIE_x_g) + \ |
98 |
+ |
CIE_x_r*CIE_y_g - CIE_x_g*CIE_y_r ) ) |
99 |
+ |
|
100 |
+ |
#define CIE_rf (CIE_y_r*CIE_C_rD/CIE_D) |
101 |
+ |
#define CIE_gf (CIE_y_g*CIE_C_gD/CIE_D) |
102 |
+ |
#define CIE_bf (CIE_y_b*CIE_C_bD/CIE_D) |
103 |
+ |
|
104 |
+ |
/* As of 9-94, CIE_rf=.265074126, CIE_gf=.670114631 and CIE_bf=.064811243 */ |
105 |
+ |
|
106 |
+ |
/***** The following definitions are valid for RGB colors only... *****/ |
107 |
+ |
|
108 |
+ |
#define bright(col) (CIE_rf*(col)[RED]+CIE_gf*(col)[GRN]+CIE_bf*(col)[BLU]) |
109 |
+ |
#define normbright(c) ( ( (long)(CIE_rf*256.+.5)*(c)[RED] + \ |
110 |
+ |
(long)(CIE_gf*256.+.5)*(c)[GRN] + \ |
111 |
+ |
(long)(CIE_bf*256.+.5)*(c)[BLU] ) >> 8 ) |
112 |
+ |
|
113 |
|
/* luminous efficacies over visible spectrum */ |
114 |
|
#define MAXEFFICACY 683. /* defined maximum at 550 nm */ |
115 |
|
#define WHTEFFICACY 179. /* uniform white light */ |
121 |
|
|
122 |
|
#define luminance(col) (WHTEFFICACY * bright(col)) |
123 |
|
|
124 |
+ |
/***** ...end of stuff specific to RGB colors *****/ |
125 |
+ |
|
126 |
|
#define intens(col) ( (col)[0] > (col)[1] \ |
127 |
|
? (col)[0] > (col)[2] ? (col)[0] : (col)[2] \ |
128 |
|
: (col)[1] > (col)[2] ? (col)[1] : (col)[2] ) |
138 |
|
|
139 |
|
/* picture format identifier */ |
140 |
|
#define COLRFMT "32-bit_rle_rgbe" |
141 |
+ |
#define CIEFMT "32-bit_rle_xyze" |
142 |
+ |
#define PICFMT "32-bit_rle_???e" /* matches either */ |
143 |
+ |
#define LPICFMT 15 /* max format id len */ |
144 |
|
|
145 |
|
/* macros for exposures */ |
146 |
|
#define EXPOSSTR "EXPOSURE=" |
156 |
|
#define aspectval(hl) atof((hl)+LASPECTSTR) |
157 |
|
#define fputaspect(pa,fp) fprintf(fp,"%s%f\n",ASPECTSTR,pa) |
158 |
|
|
159 |
+ |
/* macros for primary specifications */ |
160 |
+ |
#define PRIMARYSTR "PRIMARIES=" |
161 |
+ |
#define LPRIMARYSTR 10 |
162 |
+ |
#define isprims(hl) (!strncmp(hl,PRIMARYSTR,LPRIMARYSTR)) |
163 |
+ |
#define primsval(p,hl) sscanf(hl+LPRIMARYSTR, \ |
164 |
+ |
"%f %f %f %f %f %f %f %f", \ |
165 |
+ |
&(p)[RED][CIEX],&(p)[RED][CIEY], \ |
166 |
+ |
&(p)[GRN][CIEX],&(p)[GRN][CIEY], \ |
167 |
+ |
&(p)[BLU][CIEX],&(p)[BLU][CIEY], \ |
168 |
+ |
&(p)[WHT][CIEX],&(p)[WHT][CIEY]) |
169 |
+ |
#define fputprims(p,fp) fprintf(fp, \ |
170 |
+ |
"%s %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f\n",\ |
171 |
+ |
PRIMARYSTR, \ |
172 |
+ |
(p)[RED][CIEX],(p)[RED][CIEY], \ |
173 |
+ |
(p)[GRN][CIEX],(p)[GRN][CIEY], \ |
174 |
+ |
(p)[BLU][CIEX],(p)[BLU][CIEY], \ |
175 |
+ |
(p)[WHT][CIEX],(p)[WHT][CIEY]) |
176 |
+ |
|
177 |
|
/* macros for color correction */ |
178 |
|
#define COLCORSTR "COLORCORR=" |
179 |
|
#define LCOLCORSTR 10 |
183 |
|
#define fputcolcor(cc,fp) fprintf(fp,"%s %f %f %f\n",COLCORSTR, \ |
184 |
|
(cc)[RED],(cc)[GRN],(cc)[BLU]) |
185 |
|
|
186 |
< |
extern double ldexp(), atof(); |
186 |
> |
/* |
187 |
> |
* Conversions to and from XYZ space generally don't apply WHTEFFICACY. |
188 |
> |
* If you need Y to be luminance (cd/m^2), this must be applied when |
189 |
> |
* converting from radiance (watts/sr/m^2). |
190 |
> |
*/ |
191 |
> |
|
192 |
> |
extern RGBPRIMS stdprims; /* standard primary chromaticities */ |
193 |
> |
extern COLORMAT rgb2xyzmat; /* RGB to XYZ conversion matrix */ |
194 |
> |
extern COLORMAT xyz2rgbmat; /* XYZ to RGB conversion matrix */ |
195 |
> |
extern COLOR cblack, cwhite; /* black (0,0,0) and white (1,1,1) */ |
196 |
> |
|
197 |
> |
#define CGAMUT_LOWER 01 |
198 |
> |
#define CGAMUT_UPPER 02 |
199 |
> |
#define CGAMUT (CGAMUT_LOWER|CGAMUT_UPPER) |
200 |
> |
|
201 |
> |
#define rgb_cie(xyz,rgb) colortrans(xyz,rgb2xyzmat,rgb) |
202 |
> |
|
203 |
> |
#ifdef BSD |
204 |
> |
#define cpcolormat(md,ms) bcopy((void *)ms,(void *)md,sizeof(COLORMAT)) |
205 |
> |
#else |
206 |
> |
#define cpcolormat(md,ms) memcpy((void *)md,(void *)ms,sizeof(COLORMAT)) |
207 |
> |
#endif |
208 |
> |
|
209 |
> |
/* defined in color.c */ |
210 |
> |
extern char *tempbuffer(unsigned int len); |
211 |
> |
extern int fwritecolrs(COLR *scanline, int len, FILE *fp); |
212 |
> |
extern int freadcolrs(COLR *scanline, int len, FILE *fp); |
213 |
> |
extern int fwritescan(COLOR *scanline, int len, FILE *fp); |
214 |
> |
extern int freadscan(COLOR *scanline, int len, FILE *fp); |
215 |
> |
extern void setcolr(COLR clr, double r, double g, double b); |
216 |
> |
extern void colr_color(COLOR col, COLR clr); |
217 |
> |
extern int bigdiff(COLOR c1, COLOR c2, double md); |
218 |
> |
/* defined in spec_rgb.c */ |
219 |
> |
extern void spec_rgb(COLOR col, int s, int e); |
220 |
> |
extern void spec_cie(COLOR col, int s, int e); |
221 |
> |
extern void cie_rgb(COLOR rgb, COLOR xyz); |
222 |
> |
extern int clipgamut(COLOR col, double brt, int gamut, |
223 |
> |
COLOR lower, COLOR upper); |
224 |
> |
extern void colortrans(COLOR c2, COLORMAT mat, COLOR c1); |
225 |
> |
extern void multcolormat(COLORMAT m3, COLORMAT m2, |
226 |
> |
COLORMAT m1); |
227 |
> |
extern void compxyz2rgbmat(COLORMAT mat, RGBPRIMS pr); |
228 |
> |
extern void comprgb2xyzmat(COLORMAT mat, RGBPRIMS pr); |
229 |
> |
extern void comprgb2rgbmat(COLORMAT mat, RGBPRIMS pr1, RGBPRIMS pr2); |
230 |
> |
extern void compxyzWBmat(COLORMAT mat, float wht1[2], |
231 |
> |
float wht2[2]); |
232 |
> |
extern void compxyz2rgbWBmat(COLORMAT mat, RGBPRIMS pr); |
233 |
> |
extern void comprgb2xyzWBmat(COLORMAT mat, RGBPRIMS pr); |
234 |
> |
extern void comprgb2rgbWBmat(COLORMAT mat, RGBPRIMS pr1, RGBPRIMS pr2); |
235 |
> |
/* defined in colrops.c */ |
236 |
> |
extern int setcolrcor(double (*f)(), double a2); |
237 |
> |
extern int setcolrinv(double (*f)(), double a2); |
238 |
> |
extern int setcolrgam(double g); |
239 |
> |
extern int colrs_gambs(COLR *scan, int len); |
240 |
> |
extern int gambs_colrs(COLR *scan, int len); |
241 |
> |
extern void shiftcolrs(COLR *scan, int len, int adjust); |
242 |
> |
extern void normcolrs(COLR *scan, int len, int adjust); |
243 |
> |
|
244 |
> |
|
245 |
> |
#ifdef __cplusplus |
246 |
> |
} |
247 |
> |
#endif |
248 |
> |
#endif /* _RAD_COLOR_H_ */ |
249 |
> |
|