add option to choose max_iter for mandelbrot
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@ -14,7 +14,7 @@ int main(int argc, char *argv[]) {
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if (!image)
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if (!image)
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err(EXIT_FAILURE, "could not allocate image");
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err(EXIT_FAILURE, "could not allocate image");
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mandelbrot(image, 100);
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mandelbrot(image, opt.max_iter);
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print_ppm(image, opt.output);
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print_ppm(image, opt.output);
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fclose(opt.output);
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fclose(opt.output);
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@ -9,17 +9,22 @@ struct options parse_options(int *argc, char **argv[]) {
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.output = stdout,
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.output = stdout,
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.w = 960,
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.w = 960,
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.h = 540,
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.h = 540,
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.max_iter = 100,
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};
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};
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opterr = 0; // Deactivate error message from `getopt`
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opterr = 0; // Deactivate error message from `getopt`
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int opt;
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int opt;
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while ((opt = getopt(*argc, *argv, "h:o:w:")) != -1) {
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while ((opt = getopt(*argc, *argv, "h:m:o:w:")) != -1) {
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switch (opt) {
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switch (opt) {
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case 'h':
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case 'h':
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if (!sscanf(optarg, "%zu", &opts.h))
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if (!sscanf(optarg, "%zu", &opts.h))
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errx(EXIT_FAILURE, "could not parse height");
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errx(EXIT_FAILURE, "could not parse height");
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break;
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break;
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case 'm':
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if (!sscanf(optarg, "%zu", &opts.max_iter))
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errx(EXIT_FAILURE, "could not parse max_iter");
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break;
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case 'o':
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case 'o':
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if (!freopen(optarg, "w", opts.output))
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if (!freopen(optarg, "w", opts.output))
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err(EXIT_FAILURE, "could not open output file");
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err(EXIT_FAILURE, "could not open output file");
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@ -29,7 +34,8 @@ struct options parse_options(int *argc, char **argv[]) {
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errx(EXIT_FAILURE, "could not parse width");
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errx(EXIT_FAILURE, "could not parse width");
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break;
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break;
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default:
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default:
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fprintf(stderr, "Usage: %s [-o FILE] [-h HEIGHT] [-w WIDTH]\n",
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fprintf(stderr,
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"Usage: %s [-o FILE] [-m MAX_ITER] [-h HEIGHT] [-w WIDTH]\n",
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(*argv)[0]);
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(*argv)[0]);
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exit(EXIT_FAILURE);
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exit(EXIT_FAILURE);
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}
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}
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@ -8,6 +8,7 @@ struct options {
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FILE *output;
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FILE *output;
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size_t w;
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size_t w;
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size_t h;
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size_t h;
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size_t max_iter;
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};
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};
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struct options parse_options(int *argc, char **argv[]);
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struct options parse_options(int *argc, char **argv[]);
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