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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[]
.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[]
.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)