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.TH "al_color_rgb_to_cmyk" "3alleg5" "" "Allegro reference manual" ""
.hy
.SH NAME
.PP
al_color_rgb_to_cmyk - Allegro 5 API
.SH SYNOPSIS
.IP
.nf
\f[C]
#include <allegro5/allegro_color.h>

void al_color_rgb_to_cmyk(float red, float green, float blue,
   float *cyan, float *magenta, float *yellow, float *key)
\f[R]
.fi
.SH DESCRIPTION
.PP
Each RGB color can be represented in CMYK with a K component of 0 with
the following formula:
.IP
.nf
\f[C]
C = 1 - R
M = 1 - G
Y = 1 - B
K = 0
\f[R]
.fi
.PP
This function will instead find the representation with the maximal
value for K and minimal color components.
.SH SEE ALSO
.PP
al_color_cmyk(3alleg5), al_color_cmyk_to_rgb(3alleg5)