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// MIT License, Copyright (c) 2020 Marvin Borner
#include <conv.h>
#include <def.h>
#include <gui.h>
#include <input.h>
#include <print.h>
#include <random.h>
#include <str.h>
#include <sys.h>
void draw_pixel(struct window *win, int x, int y, u32 c)
{
int pos = x * (win->bpp >> 3) + y * win->pitch;
win->fb[pos + 0] = GET_BLUE(c);
win->fb[pos + 1] = GET_GREEN(c);
win->fb[pos + 2] = GET_RED(c);
win->fb[pos + 3] = GET_ALPHA(c);
}
void draw_mandelbrot(struct window *win, int resolution)
{
int height = win->height;
int width = win->width;
int max = resolution;
for (int row = 0; row < height; row++) {
for (int col = 0; col < width; col++) {
double c_re = (col - width / 2.0) * 4.0 / width;
double c_im = (row - height / 2.0) * 4.0 / width;
double x = 0, y = 0;
int iteration = 0;
while (x * x + y * y <= 4 && iteration < max) {
double x_new = x * x - y * y + c_re;
y = 2 * x * y + c_im;
x = x_new;
iteration++;
}
srand(iteration);
if (iteration < max)
draw_pixel(win, col, row, rand() | 0xff000000);
else
draw_pixel(win, col, row, BG_COLOR);
}
}
gui_redraw();
yield();
}
int main()
{
print("[mandelbrot window loaded]\n");
struct window *win = gui_new_window(WF_DEFAULT);
gui_fill(win, BG_COLOR);
event_register(EVENT_KEYBOARD);
int resolution = 0;
struct message *msg;
while (1) {
if (!(msg = msg_receive())) {
yield();
continue;
}
if (msg->type == EVENT_KEYBOARD && ((struct event_keyboard *)msg->data)->press)
draw_mandelbrot(win, ++resolution);
};
return 0;
}
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