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#include <stdio.h>
#include <string.h>
// This is a standalone utility to convert old-style palettized BMPs
// to transparent PNGs.
#include "tile.h"
#include <SDL_main.h>
int main(int argc, char **argv)
{
if (argc < 2)
{
printf("Usage: %s (filename.bmp)\n", argv[0]);
return -1;
}
char dest[1024];
strcpy(dest, argv[1]);
size_t len = strlen(dest);
if (!strcmp(&dest[len-4], ".bmp"))
{
dest[len-3] = 'p';
dest[len-2] = 'n';
dest[len-1] = 'g';
}
else if (!strcmp(&dest[len-4], ".png"))
{
// ok as-is.
}
else
{
printf("File '%s' does not end in bmp or png.\n", argv[1]);
return -2;
}
tile conv;
if (!conv.load(argv[1]))
{
printf("Failed to load '%s'.\n", argv[1]);
return -3;
}
conv.replace_colour(tile_colour::background, tile_colour::transparent);
if (!write_png(dest, &conv.get_pixel(0,0), conv.width(), conv.height()))
{
printf("Failed to write dest '%s'.\n", dest);
return -4;
}
printf("Converted '%s'.\n", argv[1]);
return 0;
}
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