tearing.cpp

// Tearing test

#include "32blit.hpp"

uint16_t width = 160;
uint16_t height = 120;
uint32_t prev_buttons = blit::buttons;

void init(void) {
    blit::set_screen_mode(blit::lores);
}

void update(uint32_t time) {

}


void render(uint32_t time) {    
    static uint32_t renders = 0;
    
    if ((blit::buttons ^ prev_buttons) & blit::button::A) {
        blit::set_screen_mode(blit::lores);
        width = 160;
        height = 120;
    }
    else if ((blit::buttons ^ prev_buttons) & blit::button::B) {
        blit::set_screen_mode(blit::hires);
        width = 320;
        height = 240;
    }
    prev_buttons = blit::buttons;

    blit::fb.pen(blit::rgba(0, 0, 0));
    blit::fb.clear();

    blit::fb.pen(blit::rgba(255, 255, 255));
    for (int n = 0; n < width; n += 20) {
        blit::fb.rectangle(blit::rect((renders + n) % width, 0, 1, height));
    }
    renders++;
}