diff options
Diffstat (limited to 'source/blender/blenlib/intern/math_color.c')
| -rw-r--r-- | source/blender/blenlib/intern/math_color.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/source/blender/blenlib/intern/math_color.c b/source/blender/blenlib/intern/math_color.c index ef1d5da56d8..93143eb7db3 100644 --- a/source/blender/blenlib/intern/math_color.c +++ b/source/blender/blenlib/intern/math_color.c @@ -488,6 +488,11 @@ float rgb_to_grayscale(float rgb[3]) return 0.3f*rgb[0] + 0.58f*rgb[1] + 0.12f*rgb[2]; } +unsigned char rgb_to_grayscale_byte(unsigned char rgb[3]) +{ + return (76*(unsigned short)rgb[0] + 148*(unsigned short)rgb[1] + 31*(unsigned short)rgb[2]) / 255; +} + /* ********************************* lift/gamma/gain / ASC-CDL conversion ********************************* */ void lift_gamma_gain_to_asc_cdl(float *lift, float *gamma, float *gain, float *offset, float *slope, float *power) |