png2open.c

从sourceforge下的图像压缩源码

/***
 * png2open.c
 *** 
 * 2007-04-30
 * [e-mail]  
 ***
 * utilita pro konverzi PNG => OPEN
 */

#undef __STRICT_ANSI__

#include "open.h"
#include "error.h"
#include "pngfunc.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/***
 * parametry:
 *   <png> <open> <metoda> <kvalita> 
 */
int main(int argc, char *argv[])
{
	if(argc != 5)
	{
		printf("Pouziti: ");
		printf(argv[0]);
		printf(" <vstup.png> <vystup.open> <metoda> <kvalita>\n");
		printf("\t<metoda>: dct, dwt; <kvalita>: 0..100\n");
		return(EXIT_FAILURE);
	}

	char *ifn = argv[1];
	char *ofn = argv[2];
	char *mth = argv[3];
	char *qlt = argv[4];

	openMethod method;
	if(0 == strcasecmp(mth,"dct"))
		method = DCT;
	else
	if(0 == strcasecmp(mth,"dwt"))
		method = DWT;
	else
	{
		printf("Chyba: neznama metoda.\n");
		return(EXIT_FAILURE);
	}

	int quality = atoi(qlt);

	if(!(1 <= quality && quality <= 100))
	{
		printf("Chyba: neplatna kvalita.\n");
		return(EXIT_FAILURE);
	}

	dprintf("Debug: %s %s %i %i\n",ifn,ofn,method,quality);

	int ret = check_sizeof();
	if(ret)
	{
		eprintf("Error in size of data types (%i).",ret);
		return(EXIT_FAILURE);
	}

	PFrameBuff image = loadpng(ifn);
	if( NULL == image )
	{
		printf("Chyba pri nacitani PNG obrazku.\n");
		return(EXIT_FAILURE);
	}

	FILE *f;
	if( NULL == (f = fopen(ofn, "wb")) )
	{
		printf("Chyba pri otevirani vystupniho souboru!");
		return(EXIT_FAILURE);
	}

	int res = openCompress(f, image, method, quality);

	fclose(f);

	if(res)
	{
		printf("Komprese selhala!");
		return(EXIT_FAILURE);
	}

	return(EXIT_SUCCESS);
}