libtthimage/Tools/tga_alpha.c

134 lines
3.1 KiB
C

/*
=I =I
=I=I=I =I =I=I=I =I=I=I =I=I=I =I=I =I=I=I =I=I=I
=I =I =I =I =I =I =I =I =I =I =I =I =I =I=I
=I =I =I =I =I =I =I =I =I =I =I =I =I =I=I
=I=I=I =I =I=I=I =I =I =I=I=I =I=I =I=I=I =I=I=I
=I =I
=I =I
*/
#include <stdio.h>
#include <stdlib.h>
#include "tga_outils.h"
/*::------------------------------------------------------------------::*/
#define ALPHA_ADD 1
#define ALPHA_REDUCE 2
#define ALPHA_KILL 3
#define ALPHA_SETV 4
mot_clef mots_clef[] =
{
{ "add", ALPHA_ADD, "i", "value of alpha channel" },
{ "reduce", ALPHA_REDUCE, "i", "param = ?, put zero..." },
{ "kill", ALPHA_KILL, "", "kill the alpha channel" },
{ "setv", ALPHA_SETV, "i", "set alpha channel to param" },
{ NULL, 0, NULL, NULL }
};
/*::------------------------------------------------------------------::*/
void usage(int flag)
{
fprintf(stderr, "* tga_alpha v 0.0.10 [%s] %s\n",
TGA_OUTILS_VERSION, TGA_OUTILS_COPYLEFT);
Image_print_version(0);
fprintf(stderr, "Usage:\n tga_alpha src op dst\n");
if (flag)
{
liste_mots_clefs(mots_clef, 0);
}
exit(5);
}
/*::------------------------------------------------------------------::*/
/*
* argv[1] = source image
* argv[2] = operation
* argv[3] = destination image
*/
#define FIRST_PARAM 4
int main(int argc, char *argv[])
{
Image_Desc *src, *dst;
int foo;
int idx, commande, nbargs;
/* XXX RGB_map map; */
dump_command_line(argc, argv, 0);
if (argc<3) usage(1);
/* search operation keyword in table */
idx = cherche_mot_clef(argv[2], mots_clef, &commande, &nbargs);
if (idx < 0)
{
fprintf(stderr, "tga_filtres: mot-clef %s inconnu...\n", argv[2]);
exit (5);
}
foo = parse_parametres(argc, argv, mots_clef[idx].ptypes, FIRST_PARAM);
#if DEBUG_LEVEL
fprintf(stderr, "tga_alpha: parse params : %d\n", foo);
#endif
if ( (src=Image_TGA_alloc_load(argv[1])) == NULL )
{
fprintf(stderr, "tga_alpha: can't load '%s'\n", argv[1]);
exit(1);
}
if ( (dst=Image_clone(src, 0)) == NULL )
{
fprintf(stderr, "tga_alpha: can't clone %p\n", src);
exit(1);
}
switch (commande)
{
case ALPHA_ADD:
Image_copy(src, dst);
foo = GIP(0);
fprintf(stderr, "valeur canal alpha %d\n", foo);
Image_add_alpha_channel(dst, foo);
break;
case ALPHA_REDUCE:
fprintf(stderr, "'%s' not implemented.\n", argv[2]);
exit(1);
break;
case ALPHA_KILL:
Image_copy(src, dst);
fprintf(stderr, "jette le canal alpha\n");
Image_kill_alpha_channel(dst);
break;
case ALPHA_SETV:
Image_copy(src, dst);
foo = Image_alpha_setvalue(dst, GIP(0));
break;
default:
fprintf(stderr, "FUNCTION NOT IMPLEMENTED\n");
break;
}
if (foo)
{
fprintf(stderr, "alpha op -> %d\n", foo);
}
foo = Image_TGA_save(argv[3], dst, 0);
return 1;
}
/*::------------------------------------------------------------------::*/