| 48 |
|
#define normbright(c) (int)((67L*(c)[RED]+168L*(c)[GRN]+21L*(c)[BLU])/256) |
| 49 |
|
#endif |
| 50 |
|
|
| 51 |
< |
#define D65EFFICACY 203. /* luminous efficacy of D65 */ |
| 52 |
< |
#define luminance(col) (D65EFFICACY * bright(col)) |
| 51 |
> |
/* luminous efficacies over visible spectrum */ |
| 52 |
> |
#define MAXEFFICACY 683. /* defined maximum at 550 nm */ |
| 53 |
> |
#define WHTEFFICACY 179. /* uniform white light */ |
| 54 |
> |
#define D65EFFICACY 203. /* standard illuminant D65 */ |
| 55 |
> |
#define INCEFFICACY 160. /* illuminant A (incand.) */ |
| 56 |
> |
#define SUNEFFICACY 208. /* illuminant B (solar dir.) */ |
| 57 |
> |
#define SKYEFFICACY D65EFFICACY /* skylight */ |
| 58 |
> |
#define DAYEFFICACY D65EFFICACY /* combined sky and solar */ |
| 59 |
> |
|
| 60 |
> |
#define luminance(col) (WHTEFFICACY * bright(col)) |
| 61 |
|
|
| 62 |
|
#define intens(col) ( (col)[0] > (col)[1] \ |
| 63 |
|
? (col)[0] > (col)[2] ? (col)[0] : (col)[2] \ |
