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.TH LIBGLITTER_SPLIT_*_RASTER 3 LIBGLITTER
.SH NAME
libglitter_split_*_raster - Split an integer raster into mutliple rasters with narrower integers
.SH SYNOPSIS
.LP
.nf
#include <libglitter.h>
void libglitter_split_uint64_raster(uint16_t *\fIrasters\fP[3], uint16_t **\fIalphap\fP, uint64_t *\fIraster\fP,
uint64_t \fIred\fP, uint64_t \fIgreen\fP, uint64_t \fIblue\fP);
void libglitter_split_uint32_raster(uint8_t *\fIrasters\fP[3], uint8_t **\fIalphap\fP, uint32_t *\fIraster\fP,
uint32_t \fIred\fP, uint32_t \fIgreen\fP, uint32_t \fIblue\fP);
.fi
.PP
Link with
.IR "-lglitter" .
.SH DESCRIPTION
The
.BR libglitter_split_uint64_raster ()
and
.BR libglitter_split_uint32_raster ()
functions split the colour raster input in to the
.I raster
parameter into four intensity rasters, and output
the raster for the red channel to
.IR rasters[0] ,
the raster for the green channel to
.IR rasters[1] ,
and the raster for the blue channel to
.IR rasters[2] ,
and unless
.I alphap
is null, it also outputs the alpha raster to
.IR *alphap .
.PP
For the
.BR libglitter_split_uint64_raster ()
function,
.I red
shall be the value
.I 0xFFFF
shifted to make out a colour that is pure
primary red,
.I green
shall be the value
.I 0xFFFF
shifted to make out a colour that is pure
primary green, and
.I blue
shall be the value
.I 0xFFFF
shifted to make out a colour that is pure
primary blue.
For the
.BR libglitter_split_uint32_raster ()
function, the value
.I 0xFF
is used rather than
.IR 0xFFFF .
.SH RETURN VALUES
None.
.SH ERRORS
None.
.SH SEE ALSO
.BR libglitter (7),
.BR libglitter_reorder_rasters (3)
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