| 1 |
/* RCSid $Id: ccolor.h,v 3.5 2012/05/18 20:43:13 greg Exp $ */
|
| 2 |
/*
|
| 3 |
* Header file for spectral colors.
|
| 4 |
*
|
| 5 |
*/
|
| 6 |
|
| 7 |
#ifndef _MGF_COLOR_H_
|
| 8 |
#define _MGF_COLOR_H_
|
| 9 |
#ifdef __cplusplus
|
| 10 |
extern "C" {
|
| 11 |
#endif
|
| 12 |
|
| 13 |
#define C_CMINWL 380 /* minimum wavelength */
|
| 14 |
#define C_CMAXWL 780 /* maximum wavelength */
|
| 15 |
#define C_CNSS 41 /* number of spectral samples */
|
| 16 |
#define C_CWLI ((C_CMAXWL-C_CMINWL)/(C_CNSS-1))
|
| 17 |
#define C_CMAXV 10000 /* nominal maximum sample value */
|
| 18 |
#define C_CLPWM (683./C_CMAXV) /* peak lumens/watt multiplier */
|
| 19 |
|
| 20 |
#define C_CSSPEC 01 /* flag if spectrum is set */
|
| 21 |
#define C_CDSPEC 02 /* flag if defined w/ spectrum */
|
| 22 |
#define C_CSXY 04 /* flag if xy is set */
|
| 23 |
#define C_CDXY 010 /* flag if defined w/ xy */
|
| 24 |
#define C_CSEFF 020 /* flag if efficacy set */
|
| 25 |
|
| 26 |
typedef struct {
|
| 27 |
int clock; /* incremented each change */
|
| 28 |
void *client_data; /* pointer to private client-owned data */
|
| 29 |
short flags; /* what's been set and how */
|
| 30 |
short ssamp[C_CNSS]; /* spectral samples, min wl to max */
|
| 31 |
long ssum; /* straight sum of spectral values */
|
| 32 |
float cx, cy; /* xy chromaticity value */
|
| 33 |
float eff; /* efficacy (lumens/watt) */
|
| 34 |
} C_COLOR;
|
| 35 |
|
| 36 |
#define C_DEFCOLOR { 1, NULL, C_CDXY|C_CSXY|C_CSSPEC|C_CSEFF,\
|
| 37 |
{C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
|
| 38 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
|
| 39 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
|
| 40 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
|
| 41 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
|
| 42 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,\
|
| 43 |
C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV,C_CMAXV},\
|
| 44 |
(long)C_CNSS*C_CMAXV, 1./3., 1./3., 178.006 }
|
| 45 |
|
| 46 |
#define c_cval(c,l) ((c)->ssamp[((l)+(C_CWLI/2.-C_MINWL))/C_CWLI] \
|
| 47 |
/ (double)(c)->ssum)
|
| 48 |
|
| 49 |
extern const C_COLOR c_dfcolor; /* default color */
|
| 50 |
|
| 51 |
extern const C_COLOR c_x31, c_y31, c_z31; /* 1931 standard observer */
|
| 52 |
|
| 53 |
/* set CIE (x,y) chromaticity */
|
| 54 |
#define c_cset(c,x,y) ((c)->cx=(x),(c)->cy=(y),(c)->flags=C_CDXY|C_CSXY)
|
| 55 |
|
| 56 |
/* set black body spectrum */
|
| 57 |
extern int c_bbtemp(C_COLOR *clr, double tk);
|
| 58 |
/* assign arbitrary spectrum */
|
| 59 |
extern double c_sset(C_COLOR *clr, double wlmin, double wlmax,
|
| 60 |
const float spec[], int nwl);
|
| 61 |
extern void c_ccvt(C_COLOR *clr, int fl); /* fix color representation */
|
| 62 |
extern int c_isgrey(C_COLOR *clr); /* check if color is grey */
|
| 63 |
/* mix two colors */
|
| 64 |
extern void c_cmix(C_COLOR *cres, double w1, C_COLOR *c1,
|
| 65 |
double w2, C_COLOR *c2);
|
| 66 |
/* multiply two colors */
|
| 67 |
extern double c_cmult(C_COLOR *cres, C_COLOR *c1, double y1,
|
| 68 |
C_COLOR *c2, double y2);
|
| 69 |
/* convert to sharpened RGB */
|
| 70 |
extern void c_toSharpRGB(C_COLOR *cin, double cieY, float cout[3]);
|
| 71 |
/* convert from sharpened RGB */
|
| 72 |
extern double c_fromSharpRGB(float cin[3], C_COLOR *cout);
|
| 73 |
|
| 74 |
/* The following two routines are not defined in ccolor.c */
|
| 75 |
/* convert to RGB color */
|
| 76 |
extern void ccy2rgb(C_COLOR *cin, double cieY, float cout[3]);
|
| 77 |
/* convert from RGB color */
|
| 78 |
extern double rgb2ccy(float cin[3], C_COLOR *cout);
|
| 79 |
|
| 80 |
#ifdef __cplusplus
|
| 81 |
}
|
| 82 |
#endif
|
| 83 |
#endif /* _MGF_COLOR_H_ */
|
