diff options
Diffstat (limited to 'doc/info/chap/functions.texinfo')
| -rw-r--r-- | doc/info/chap/functions.texinfo | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/doc/info/chap/functions.texinfo b/doc/info/chap/functions.texinfo index b47a584..9ddefdf 100644 --- a/doc/info/chap/functions.texinfo +++ b/doc/info/chap/functions.texinfo @@ -18,7 +18,11 @@ Described in @ref{sRGB}. @item int libcolour_delta_e(const libcolour_colour_t*, const libcolour_colour_t*, double*) Calculates the @math{\Delta E^*_{ab}} distance -(the distance in CIE L*a*b*) of two colours. +(the distance in CIE L*a*b*) of two colours, +and outputs it to the last parameter. +Returns 0 on success and @math{-1} one error. +This function fails if and only if +@code{libcolour_convert} fails. @item int libcolour_proper(libcolour_colour_t*) Sets any member or submember that may be |