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#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <getopt.h>
#include <string.h>
#include <time.h>
#include "grids.h"
#include "precision.h"
#include "fractals.h"
#ifndef NUM_RUNS
#define NUM_RUNS 5
#endif
void print_usage(FILE* file, const char* program_name){
fprintf(file, "Usage: %s [-v] [-i iterations] [-x x_res] [-y y_res] [-z magnification] [-l lower_left] [-u upper_right] [-o output_grid] -f fractal\n", program_name);
}
void print_help(){
printf("Options:\n"
" -i, --iterations <value> the number of iterations (default: 100)\n"
" -x, --x-res <value> the horizontal resolution (default: terminal width)\n"
" -y, --y-res <value> the vertical resolution (default: terminal height)\n"
" -l, --lower-left <value> Set the lower left corner of the fractal area (default: -2-2i)\n"
" -u, --upper-right <value> Set the upper right corner of the fractal area (default: 2+2i)\n"
" -z, --magnification <value> Set the magnification factor (default: 1)\n"
" -o, --output <filename> the output filename (default: fractal.grid)\n"
" -f, --fractal <type> the fractal type (default: mandelbrot)\n"
" supported fractals: mandelbrot, tricorn, multibrot, multicorn, burning_ship, julia\n"
" -p, --performance print performance info\n"
" -v, --verbose verbose output\n"
" -h, --help prints this help message\n");
}
void print_info(const char* program_name){
#ifdef EXTENDED_PRECISION
printf("Compiled with long double float precision\n");
#endif
#ifndef EXTENDED_PRECISION
printf("%s complied with double float precision\n", program_name);
#endif
}
double time_fractal(fractal_generator generator, grid_t* grid, grid_gen_params* params){
struct timespec start, end;
clock_gettime(CLOCK_MONOTONIC, &start);
for(size_t i = 0; i < NUM_RUNS; i++){
generator(grid, params);
}
clock_gettime(CLOCK_MONOTONIC, &end);
return (end.tv_sec - start.tv_sec + (end.tv_nsec - start.tv_nsec) * 1.0e-9) / NUM_RUNS;
}
int main(const int argc, char *argv[]) {
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
//default values
size_t iterations = 100;
size_t x_res = w.ws_col;
size_t y_res = w.ws_row;
complex_t lower_left = { .re = -2, .im = -2};
complex_t upper_right = { .re = 2, .im = 2};
CBASE magnification = 1;
bool verbose = false;
bool performance = false;
grid_gen_params* params;
char* fractal_name = "mandelbrot";
fractal_generator generator = mandelbrot_grid;
char* output_filename = "fractal.grid";
static struct option long_options[] = {
{"iterations", required_argument, NULL, 'i'},
{"x-res", required_argument, NULL, 'x'},
{"y-res", required_argument, NULL, 'y'},
{"lower-left", required_argument, NULL, 'l'},
{"upper-right", required_argument, NULL, 'u'},
{"magnification", required_argument, NULL, 'z'},
{"output", required_argument, NULL, 'o'},
{"verbose", no_argument, NULL, 'v'},
{"performance", no_argument, NULL, 'p'},
{"help", no_argument, NULL, 'h'},
{"fractal", required_argument, NULL, 'f'},
{0, 0, 0, 0} // Termination element
};
//parse command line arguments
int opt;
while((opt = getopt_long(argc, argv, "i:x:y:l:u:z:o:vphf:", long_options, NULL)) != -1){
switch(opt){
case 'i':
iterations = strtoull(optarg, NULL, 10);
break;
case 'x':
x_res = strtoull(optarg, NULL, 10);
break;
case 'y':
y_res = strtoull(optarg, NULL, 10);
break;
case 'l':
sscanf(optarg, CFORMAT"+"CFORMAT"i", &lower_left.re, &lower_left.im);
break;
case 'u':
sscanf(optarg, CFORMAT"+"CFORMAT"i", &upper_right.re, &upper_right.im);
break;
case 'o':
output_filename = optarg;
break;
case 'f':
if(strncmp(optarg, "mandelbrot", strlen("mandelbrot")) == 0) {
fractal_name = "mandelbrot";
generator = mandelbrot_grid;
}
else if(strncmp(optarg, "tricorn", strlen("tricorn")) == 0) {
fractal_name = "tricorn";
generator = tricorn_grid;
}
else if(strncmp(optarg, "multibrot", strlen("multibrot")) == 0) {
fractal_name = "multibrot";
generator = multibrot_grid;
params = malloc(sizeof(grid_gen_params));
params->degree = 3;
}
else if(strncmp(optarg, "multicorn", strlen("multicorn")) == 0) {
fractal_name = "multicorn";
generator = multicorn_grid;
params = malloc(sizeof(grid_gen_params));
params->degree = 3;
}
else if(strncmp(optarg, "burning_ship", strlen("burning_ship")) == 0) {
fractal_name = "burning ship";
generator = burning_ship_grid;
}
else if(strncmp(optarg, "julia", strlen("julia")) == 0) {
fractal_name = "julia";
generator = julia_grid;
params = malloc(sizeof(grid_gen_params));
params->cr.radius = 100;
params->cr.constant = (complex_t){ .re = 0.285, .im = 0.01 };
}
else {
fprintf(stderr, "Invalid fractal type: %s, see --help for a list of supported fractals\n", optarg);
return 1;
}
break;
case 'z':
sscanf(optarg, CFORMAT, &magnification);
if(magnification <= 0){
fprintf(stderr, "Invalid magnification "CFORMAT", exitting\n", magnification);
return 1;
}
break;
case 'v':
verbose = true;
break;
case 'p':
performance = true;
break;
case 'h':
print_usage(stdout, argv[0]);
print_help();
return 0;
default:
print_usage(stderr, argv[0]);
return 1;
}
}
grid_t* grid = create_grid(x_res, y_res, iterations, lower_left, upper_right);
if(!grid) return 1;
if(magnification != 1){
zoom_grid(grid, magnification);
}
generator(grid, params);
if(performance){
double time = time_fractal(generator, grid, params);
printf("%s,%s,%zu,%zu,"
CFORMAT","CFORMAT","CFORMAT","CFORMAT",%f\n",
argv[0], fractal_name, x_res, y_res,
lower_left.re, lower_left.im, upper_right.re, upper_right.im, time);
}
if(verbose){
print_info(argv[0]);
printf("Magnification:\t"CFORMAT"\n", magnification);
print_grid_info(grid);
}
FILE* file = fopen(output_filename, "wb");
if(write_grid(file, grid) == GRID_WRITE_ERROR){
fprintf(stderr, "Error writing occured while writting to file %s\n", output_filename);
}
fclose(file);
free(params);
free_grid(grid);
return 0;
}
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