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Skunkware 5
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X11
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xearth-0.92
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gif.c
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C/C++ Source or Header
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1995-06-25
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90 lines
/*
* gif.c
* kirk johnson
* july 1993
*
* RCS $Id: gif.c,v 1.5 1994/05/20 01:37:40 tuna Exp $
*
* Copyright (C) 1989, 1990, 1993, 1994 Kirk Lauritz Johnson
*
* Parts of the source code (as marked) are:
* Copyright (C) 1989, 1990, 1991 by Jim Frost
* Copyright (C) 1992 by Jamie Zawinski <jwz@lucid.com>
*
* Permission to use, copy, modify, distribute, and sell this
* software and its documentation for any purpose is hereby granted
* without fee, provided that the above copyright notice appear in
* all copies and that both that copyright notice and this
* permission notice appear in supporting documentation. The author
* makes no representations about the suitability of this software
* for any purpose. It is provided "as is" without express or
* implied warranty.
*
* THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, INDIRECT
* OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "xearth.h"
#include "giflib.h"
#include "kljcpyrt.h"
static u_char *dith;
void gif_setup(s)
FILE *s;
{
int i;
int rtn;
BYTE cmap[3][256];
dither_setup(num_colors);
dith = (u_char *) malloc((unsigned) wdth);
assert(dith != NULL);
for (i=0; i<dither_ncolors; i++)
{
cmap[0][i] = dither_colormap[i*3+0];
cmap[1][i] = dither_colormap[i*3+1];
cmap[2][i] = dither_colormap[i*3+2];
}
rtn = gifout_open_file(s, wdth, hght, dither_ncolors, cmap, 0);
assert(rtn == GIFLIB_SUCCESS);
rtn = gifout_open_image(0, 0, wdth, hght);
assert(rtn == GIFLIB_SUCCESS);
}
void gif_row(row)
u_char *row;
{
int i;
dither_row(row, dith);
for (i=0; i<wdth; i++)
gifout_put_pixel(dith[i]);
}
void gif_cleanup()
{
int rtn;
rtn = gifout_close_image();
assert(rtn == GIFLIB_SUCCESS);
rtn = gifout_close_file();
assert(rtn == GIFLIB_SUCCESS);
dither_cleanup();
free(dith);
}