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.Dd September 8, 2018
.Dt GFXX 1
.Os "Causal Agency"
.
.Sh NAME
.Nm gfxx
.Nd graphics data explorer
.
.Sh SYNOPSIS
.Nm
.Op Fl fm
.Op Fl c Ar space
.Op Fl p Ar file
.Op Fl e Ar lb
.Op Fl E Ar lb
.Op Fl b Ar bits
.Op Fl n Ar offset
.Op Fl w Ar width
.Op Fl z Ar scale
.Op Fl o Ar prefix
.
.Sh DESCRIPTION
.Nm
is an interactive graphics data explorer
capable of dumping PNGs.
.
.Pp
The arguments are as follows:
.Bl -tag -width Ds
.It Fl E Ar lb
Set bit order to little or big endian.
.
.It Fl b Ar bits
Set number of bits of padding,
red,
green
and blue
components.
Four digits are required.
.
.It Fl c Ar space
Set color space to one of
.Cm indexed ,
.Cm grayscale ,
.Cm rgb .
.
.It Fl e Ar lb
Set byte order to little or big endian.
.
.It Fl f
Flip display vertically.
.
.It Fl m
Mirror display horizontally.
.
.It Fl n Ar offset
Set byte offset into data.
.
.It Fl o Ar prefix
Set PNG output filename prefix.
.
.It Fl p Ar file
Load indexed color palette from
.Ar file .
.
.It Fl w Ar width
Set display column width.
.
.It Fl z Ar scale
Set display scale.
.El
.
.Pp
The interactive keys are as follows:
.Bl -tag -width Ds
.It Ic q
Quit.
.
.It Ic x
Export one frame as PNG.
.
.It Ic X
Export each frame as PNG.
.
.It Ic o
Print interactive options.
.
.It Ic []
Select color space.
.
.It Ic p
Sample indexed palette from top-left corner.
.
.It Ic P
Export indexed palette as RGB data.
.
.It Ic {}
Select bits preset.
.
.It Ic e
Toggle byte order.
.
.It Ic E
Toggle bit order.
.
.It Ic hl
Adjust offset by byte.
.
.It Ic jk
Adjust offset by pixel.
.
.It Ic HL
Adjust offset by pixel row.
.
.It Ic JK
Adjust offset by pixel row square.
.
.It Ic ,.
Adjust display column width.
.
.It Ic <>
Adjust display column width by half or double.
.
.It Ic f
Toggle vertically flipped display.
.
.It Ic m
Toggle horizontally mirrored display.
.
.It Ic -+
Adjust display scale.
.
.It Ic 0-9
Set bits.
.El
.
.Sh SEE ALSO
.Xr pngo 1