int main(int argc, char *argv[])
{
char *input_image;
char whynot[256];
int i, width, height, has_alpha;
if (argc < 2)
usage();
for (i = 0; i < 6; i++) {
char inputfilename[PATH_MAX], outputfilename[PATH_MAX];
if (strlen(argv[1]) > PATH_MAX - 20) {
fprintf(stderr, "Length of argv[1] is too long, buster.\n");
return 1;
}
sprintf(inputfilename, "%s%d.png", argv[1], i);
sprintf(outputfilename, "%s-masked%d.png", argv[1], i);
printf("Processing %s -> %s\n", inputfilename, outputfilename);
input_image = png_utils_read_png_image(inputfilename, 0, 0, 0,
&width, &height, &has_alpha, whynot, sizeof(whynot));
if (!input_image) {
fprintf(stderr, "png_utils_read_png_image: %s: %s -- skipping.\n", inputfilename, whynot);
continue;
}
if (!has_alpha) {
fprintf(stderr, "%s does not have an alpha channel, skipping\n", inputfilename);
continue;
}
level_to_alpha(input_image, width, height);
if (png_utils_write_png_image(outputfilename, (unsigned char *) input_image, width, height, 1, 0) != 0)
fprintf(stderr, "Failed to save image %s\n", outputfilename);
free(input_image);
}
return 0;
}
static char *load_image(const char *filename, int *w, int *h, int *a, int *bytes_per_row)
{
char *i;
char msg[100];
i = png_utils_read_png_image(filename, 0, 0, 0, w, h, a, msg, sizeof(msg));
if (!i) {
fprintf(stderr, "%s: cannot load image: %s\n", filename, msg);
exit(1);
}
*bytes_per_row = *w * 3;
/* align to 4 byte boundary */
if (*bytes_per_row & 0x03)
*bytes_per_row += 4 - (*bytes_per_row & 0x03);
return i;
}
