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 void save_images(const char *prefix, unsigned char *image[])
{
int i;
char fname[PATH_MAX];
for (i = 0; i < 6; i++) {
sprintf(fname, "%s%d.png", prefix, i);
if (png_utils_write_png_image(fname, image[i], DIM, DIM, 1, 0))
fprintf(stderr, "Failed to write %s\n", fname);
}
}
int main(int argc, char *argv[])
{
unsigned char *image;
float crater_r;
const char *filename = "test_crater_output.png";
image = malloc(3 * 1024 * 1024);
memset(image, 127, 3 * 1024 * 1024);
crater_r = 75.0;
create_crater_heightmap((unsigned char *) image, 1024, 1024, 512, 512, (int) crater_r, 3);
if (png_utils_write_png_image(filename, image, 1024, 1024, 0, 0)) {
fprintf(stderr, "Failed to write png image %s: %s\n", filename, strerror(errno));
exit(1);
}
printf("Wrote png image to %s\n", filename);
return 0;
}