gif2herc.c

GIF87a的压缩

/*****************************************************************************
*   "Gif-Lib" - Yet another gif library.				     *
*									     *
* Written by:  Gershon Elber			IBM PC Ver 0.1,	Jul. 1989    *
******************************************************************************
* Program to display GIF file on hercules device			     *
* Options:								     *
* -d factor : use dithering of matrix of size factor by factor.		     *
* -z factor : zoom the pixels by the given factor.			     *
* -t level : set the threshold level of white in the result (0..100).	     *
* -m mapping : methods for mapping the 24bits colors into 1 BW bit.	     *
* -i : invert the image.						     *
* -b : beeps disabled.							     *
* -h : on line help.							     *
*									     *
*   This program uses TC2.0 hercules graphic driver.			     *
*   In this file Screen refers to GIF file screen, while Device to Hercules. *
******************************************************************************
* History:								     *
* 1 Jul 89 - Version 1.0 by Gershon Elber.				     *
*****************************************************************************/

#include <graphics.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <ctype.h>
#include <alloc.h>
#include <string.h>
#include <io.h>
#include <dos.h>
#include <bios.h>
#include <fcntl.h>
#include "gif_lib.h"
#include "getarg.h"

#define PROGRAM_NAME	"Gif2Herc"
#define VERSION		"