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#include <assert.h>
#include <fcntl.h>
#include <json.h>
#include <libgui.h>
#include <poll.h>
#include <pty.h>
#include <socket.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
GUI_Window *global_w;
#define SNAKE_WIDTH 10
int get_key_event(char *c) {
if (0 >= read(global_w->ws_socket, c, 1))
return 0;
if (0 == *c)
return 0;
return 1;
}
void draw_snake(int x, int y) {
int sx = global_w->sx;
uint32_t *b = &global_w->bitmap_ptr[y * sx + x];
for (int i = 0; i < SNAKE_WIDTH; i++) {
for (int j = 0; j < SNAKE_WIDTH; j++) {
b[j] = 0xFF00FF;
}
b += sx;
}
}
int clamp(int *x, int *y) {
int clamped = 0;
if (*x + SNAKE_WIDTH > global_w->sx) {
*x = global_w->sx - SNAKE_WIDTH;
clamped = 1;
}
if (*y + SNAKE_WIDTH > global_w->sy) {
*y = global_w->sy - SNAKE_WIDTH;
clamped = 1;
}
return clamped;
}
void loop() {
int vel = SNAKE_WIDTH;
static int y_dir = SNAKE_WIDTH;
static int x_dir = 0;
static int snake_x = 10;
static int snake_y = 10;
static int ticks = 0;
ticks++;
char c;
if (get_key_event(&c)) {
switch (c) {
case 'w':
y_dir = -1 * vel;
x_dir = 0;
break;
case 's':
y_dir = vel;
x_dir = 0;
break;
case 'a':
x_dir = -1 * vel;
y_dir = 0;
break;
case 'd':
x_dir = vel;
y_dir = 0;
break;
case 'q':
exit(0);
break;
default:
break;
}
}
if (!(ticks > 5))
return;
ticks = 0;
snake_x += x_dir;
snake_y += y_dir;
if (clamp(&snake_x, &snake_y))
return;
draw_snake(snake_x, snake_y);
if (y_dir || x_dir)
GUI_UpdateWindow(global_w);
}
int main(void) {
global_w = GUI_CreateWindow(10, 10, 150 * 4, 150 * 4);
assert(global_w);
for (int i = 0; i < 150 * 150 * 4 * 4; i++)
global_w->bitmap_ptr[i] = 0xFFFFFF;
GUI_UpdateWindow(global_w);
for (;;) {
loop();
msleep(50);
}
return 0;
}
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