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#include "demo.h"
#include <string.h>
#include <sys/time.h>
#include <math.h>
static const double m_1_sqrt_3 = 0.577359269;
static void
T (cairo_t *cr, int size, int iterations)
{
if (iterations-- == 0)
return;
cairo_move_to (cr, 0, 0);
cairo_line_to (cr, size, 0);
cairo_line_to (cr, size/2, size*m_1_sqrt_3);
cairo_close_path (cr);
size /= 2;
if (size >= 4) {
T (cr, size, iterations);
cairo_save (cr); {
cairo_translate (cr, size, 0);
T (cr, size, iterations);
} cairo_restore (cr);
cairo_save (cr); {
cairo_translate (cr, size/2, size*m_1_sqrt_3);
T (cr, size, iterations);
} cairo_restore (cr);
}
}
static void
draw (cairo_t *cr, int width, int height, int iterations, double theta)
{
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
cairo_save (cr);
cairo_set_source_rgb (cr, 0, 0, 0);
cairo_set_line_width (cr, 1.);
cairo_translate (cr, width/2, height/2);
cairo_rotate (cr, theta);
cairo_translate (cr, -width/2, -height/2);
T (cr, width, iterations);
cairo_stroke (cr);
cairo_restore (cr);
}
static int done;
static void signal_handler(int sig)
{
done = sig;
}
int main (int argc, char **argv)
{
struct device *device;
struct timeval start, last_tty, last_fps, now;
int iterations = 1, step = 1, tick = 10;
double delta;
int frame = 0;
int frames = 0;
int show_fps = 1;
int benchmark;
const char *version;
enum clip clip;
double theta = 0;
int n;
device = device_open(argc, argv);
version = device_show_version(argc, argv);
clip = device_get_clip(argc, argv);
benchmark = device_get_benchmark(argc, argv);
if (benchmark == 0)
benchmark = 20;
if (benchmark > 0)
show_fps = 0;
signal(SIGHUP, signal_handler);
for (n = 1; n < argc; n++) {
if (strcmp (argv[n], "--hide-fps") == 0)
show_fps = 0;
}
gettimeofday(&start, 0); now = last_tty = last_fps = start;
do {
struct framebuffer *fb = device->get_framebuffer (device);
cairo_t *cr = cairo_create(fb->surface);
draw(cr, device->width, device->height, iterations, theta);
if (--tick == 0){
iterations += step;
tick = 10;
if (iterations < 1) {
iterations = 1;
step = -step;
} else if (iterations > log2(device->width)) {
iterations = log(device->width);
step = -step;
}
}
theta += 0.1 / 180. * M_PI;
gettimeofday(&now, NULL);
if (show_fps && last_fps.tv_sec) {
fps_draw(cr, device->name, version, &last_fps, &now);
}
last_fps = now;
cairo_destroy(cr);
fb->show (fb);
fb->destroy (fb);
if (benchmark < 0 && 0) {
delta = now.tv_sec - last_tty.tv_sec;
delta += (now.tv_usec - last_tty.tv_usec)*1e-6;
frames++;
if (delta > 5) {
printf("%.2f fps\n", frames/delta);
last_tty = now;
frames = 0;
}
}
frame++;
if (benchmark > 0) {
delta = now.tv_sec - start.tv_sec;
delta += (now.tv_usec - start.tv_usec)*1e-6;
if (delta > benchmark) {
printf("sierpinski: %.2f fps\n", frame / delta);
break;
}
}
} while (!done);
if (benchmark < 0) {
struct framebuffer *fb = device->get_framebuffer (device);
cairo_t *cr = cairo_create(fb->surface);
draw(cr, device->width, device->height, 2048, 0);
cairo_destroy(cr);
fps_finish(fb, device->name, version);
fb->show (fb);
fb->destroy (fb);
pause();
}
return 0;
}
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