libtthimage/Tools/tga_dither.c

144 lines
3.5 KiB
C

/*
----------------------------------------------
utilitaire pour ditherizer (uh?) une image
----------------------------------------------
http://krabulator.free.fr/devel/libimage.html
----------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "tga_outils.h"
/*::------------------------------------------------------------------::*/
#define DI_2X2 2
#define DI_3X3_0 11
#define DI_3X3_1 12
#define DI_BAYER0 16
#define DI_ATKINSON 18
#define DI_CRUDE 30
#define DI_DBLTR 38
#define DI_ERROR 45
#define DI_RANDOM 60
#define DI_BYR8RND 70
#define DI_XPER 100
mot_clef mots_clef[] =
{
{ "2x2", DI_2X2, "", "not working" },
{ "3x3_0", DI_3X3_0, "", "" },
{ "3x3_1", DI_3X3_1, "", "" },
{ "bayer0", DI_BAYER0, "", "" },
{ "atkinson", DI_ATKINSON, "i", "mmmm ?" },
{ "crude", DI_CRUDE, "i", "" },
{ "dbltresh", DI_DBLTR, "ii", "hi & low tresholds" },
{ "error", DI_ERROR, "", "simple err diffusion" },
{ "random", DI_RANDOM, "i", "random treshold" },
{ "byr8rnd", DI_BYR8RND, "ii", "new 29 nov 2013" },
{ "xper", DI_XPER, "i", "param: 1..254" },
{ NULL, 0, NULL, NULL }
};
/*::------------------------------------------------------------------::*/
void usage(int flag)
{
fprintf(stderr, "* tga_dither v 0.0.26 [%s] (dwtfywl 2022) tTh\n",
TGA_OUTILS_VERSION);
fprintf(stderr, "usage:\n\ttga_dither avant.tga mode avant.tga [params]\n");
if (flag)
liste_mots_clefs(mots_clef, 42);
else
Image_print_version(0);
exit(5);
}
/*::------------------------------------------------------------------::*/
int main (int argc, char *argv[])
{
Image_Desc *src, *dst;
int foo;
int commande, nbargs, idx;
dump_command_line(argc, argv, 0);
if ( argc==2 && !strcmp(argv[1], "list") ) usage(1);
if ( argc < 4) usage(0);
idx = cherche_mot_clef(argv[2], mots_clef, &commande, &nbargs);
if (idx < 0)
{
fprintf(stderr, "tga_dither: keyword %s unknow.\n", argv[2]);
exit(5);
}
#if DEBUG_LEVEL
fprintf(stderr, "idx %d commande %d nbargs %d argc %d\n",
idx, commande, nbargs, argc);
#endif
foo = parse_parametres(argc, argv, mots_clef[idx].ptypes, 4);
if ( (src=Image_TGA_alloc_load(argv[1])) == NULL )
{
fprintf(stderr, "tga_dither: err load %s\n", argv[1]);
exit(5);
}
if ( (dst=Image_clone(src, 1)) == NULL )
{
fprintf(stderr, "no mem for image cloning\n");
exit(5);
}
switch (commande)
{
case DI_2X2:
foo = Image_dither_2x2(src, dst, 255);
break;
case DI_3X3_0:
foo = Image_dither_3x3_0(src, dst, 127);
break;
case DI_3X3_1:
foo = Image_dither_3x3_1(src, dst, 255);
break;
case DI_BAYER0:
foo = Image_dither_Bayer_0(src, dst, 255);
break;
case DI_ATKINSON:
foo = Image_dither_atkinson(src, dst, 255);
break;
case DI_CRUDE:
foo = Image_dither_crude(src, dst, GIP(0));
break;
case DI_DBLTR:
foo = Image_dither_double_seuil(src, dst, GIP(0), GIP(1), 255);
break;
case DI_ERROR:
foo = Image_dither_simple_error(src, dst, 255);
break;
case DI_RANDOM:
foo = Image_dither_seuil_random(src, dst, 255);
break;
case DI_BYR8RND:
srand(getpid());
foo = Image_dither_bayer8x8rnd(src, dst, GIP(0), GIP(1));
break;
case DI_XPER:
foo = Image_dither_3x3_1(src, dst, GIP(0));
break;
default:
fprintf(stderr, "dithering method not implemented\n");
foo=-1;
break;
}
if (foo)
fprintf(stderr, "dither %d retour = %d, %s\n", commande,
foo, Image_err2str(foo));
foo = Image_TGA_save(argv[3], dst, 0);
return 0;
}
/*::------------------------------------------------------------------::*/