'\" t
.\"     Title: gifclrmp
.\"    Author: [see the "Author" section]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 2 May 2012
.\"    Manual: GIFLIB Documentation
.\"    Source: GIFLIB
.\"  Language: English
.\"
.TH "GIFCLRMP" "1" "2 May 2012" "GIFLIB" "GIFLIB Documentation"
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.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
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.SH "NAME"
gifclrmp \- extract colormaps from GIF images
.SH "SYNOPSIS"
.HP \w'\fBgifclrmp\fR\ 'u
\fBgifclrmp\fR [\-v] [\-s] [\-l\ \fImapfile\fR] [\-t\ \fItrans\fR] [\-g\ \fIgamma\fR] [\-i\ \fIimage\fR] [\-h] [\fIgif\-file\fR]
.SH "DESCRIPTION"
.PP
A program to modify GIF image colormaps\&. Any local colormap in a GIF file can be modified at a time, or the global screen one\&.
.SH "OPTIONS"
.PP
\-v
.RS 4
Verbose mode (show progress)\&. Enables printout of running scan lines\&.
.RE
.PP
\-s
.RS 4
Select the global screen color map\&.
.RE
.PP
\-l mapfile
.RS 4
Load color map from this file instead of selected color map\&.
.RE
.PP
\-t trans
.RS 4
Change color index values\&. The change is made to both the selected color table and the raster bits of the selected image\&. A translation file is a list of pairs of `before\*(Aq and `after\*(Aq index values\&. At present, the `before\*(Aq index values must be in ascending order starting from 0\&.
.RE
.PP
\-g gamma
.RS 4
Apply gamma correction to selected color map\&.
.RE
.PP
\-i image
.RS 4
Select the color map of the numbered image\&.
.RE
.PP
\-h
.RS 4
Print one command line help, similar to Usage above\&.
.RE
.PP
If no GIF file is given, gifclip will try to read a GIF file from stdin\&.
.SH "NOTES"
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The default operation is to dump out the selected color map in text format\&.
.RE
.sp
.RS 4
.ie n \{\
\h'-04'\(bu\h'+03'\c
.\}
.el \{\
.sp -1
.IP \(bu 2.3
.\}
The file to load/dump is simply one color map entry per line\&. Each such entry line has four integers: "ColorIndex Red Green Blue", where color index is in ascending order starting from 1\&.
.RE
.SH "AUTHOR"
.PP
Gershon Elber\&.