Add man pages for most colour models

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 64 insertions, 0 deletions

diff --git a/LIBCOLOUR_YUV.7 b/LIBCOLOUR_YUV.7
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+.TH LIBCOLOUR_YUV 7 libcolour
+.SH NAME
+LIBCOLOUR_YUV - YUV
+.SH DESCRIPTION
+YUV colours are presented with either of
+.nf
+
+	\fBtypedef struct libcolour_yuv_f libcolour_yuv_f_t;\fP
+	\fBtypedef struct libcolour_yuv_lf libcolour_yuv_lf_t;\fP
+	\fBtypedef struct libcolour_yuv_llf libcolour_yuv_llf_t;\fP
+
+.fi
+These
+.BR struct s
+use
+.BR float ,
+.BR double ,
+and
+.BR long\ double ,
+respecitively, for the values stored in them,
+and are otherwise identical.
+.B struct libcolour_yuv_f
+is defined as
+.nf
+
+	\fBstruct libcolour_yuv_f {\fP
+		\fBenum libcolour_model\fP \fImodel\fP\fB;\fP
+		\fBfloat\fP \fIY\fP\fB;\fP
+		\fBfloat\fP \fIU\fP\fB;\fP
+		\fBfloat\fP \fIV\fP\fB;\fP
+	\fB};\fP
+
+.fi
+.I .model
+shall be set to
+.BR LIBCOLOUR_YUV .
+In
+.BR union\ libcolour_colour_f ,
+.BR union\ libcolour_colour_lf ,
+and
+.BR union\ libcolour_colour_llf ,
+.I .yuv
+is used for YUV colours.
+.P
+.IR .Y ,
+.IR .U ,
+and
+.I .V
+hold the Y (luma), U, and V values, respectively.
+.P
+Y is 0 in black and 1 in white.
+U is the difference (with a factor) between Y and blue.
+V is the difference (with a factor) between Y and red.
+.P
+YUV is additive, since it is linearly isomorphic
+to CIE 1931 XYZ. It's white point is the
+CIE Standard Illuminant D65. Additionally, conversion
+between YUV and YDbDr is done with a diagonal matrix
+multiplication.
+.SH SEE ALSO
+.BR libcolour (7)
+.SH AUTHORS
+Mattias Andrée
+.RI < maandree@kth.se >