66 lines
1.1 KiB
C
66 lines
1.1 KiB
C
#include "engine.h"
|
|
|
|
bool left = true;
|
|
|
|
// polling events every frame
|
|
void
|
|
client_poll_event() {
|
|
SDL_Event ev = game_state->event;
|
|
|
|
if (ev.type == SDL_EVENT_QUIT) {
|
|
game_state->is_running = false;
|
|
}
|
|
|
|
if (ev.type == SDL_EVENT_KEY_DOWN) {
|
|
switch (ev.key.key) {
|
|
case SDLK_Q:
|
|
game_state->is_running = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// performed every frame
|
|
void
|
|
client_update_framebuffer() {
|
|
// draw a green square
|
|
// clear_framebuffer(0x000000);
|
|
// for (int i = 0; i < 20; i++) {
|
|
// for (int j = 0; j < 20; j++) {
|
|
// put_pixel(i, j, 0x00FF00);
|
|
// }
|
|
// }
|
|
|
|
// draw alternating green squares
|
|
if (left) {
|
|
clear_framebuffer(0x000000);
|
|
for (int i = 0; i < 20; i++) {
|
|
for (int j = 0; j < 20; j++) {
|
|
put_pixel(i, j, 0x00FF00);
|
|
}
|
|
}
|
|
left = false;
|
|
} else {
|
|
clear_framebuffer(0x000000);
|
|
for (int i = 20; i < 40; i++) {
|
|
for (int j = 20; j < 40; j++) {
|
|
put_pixel(i, j, 0x00FFFF);
|
|
}
|
|
}
|
|
left = true;
|
|
}
|
|
SDL_Delay(100);
|
|
}
|
|
|
|
int main() {
|
|
// initialize the engine
|
|
if (engine_init(
|
|
client_poll_event,
|
|
client_update_framebuffer
|
|
)) {
|
|
engine_start();
|
|
engine_stop();
|
|
return 0;
|
|
} else {
|
|
return 1;
|
|
}
|
|
} |