The implementation of a piston-graphics back-end using Gfx.
This is how it looks like:
let mut g2d = G2D::new(&mut device);
for e in EventIterator::new(&mut window, &event_settings) {
use piston::event::RenderEvent;
e.render(|_| {
g2d.draw(&mut renderer, &frame, |c, g| {
c.rgb(1.0, 1.0, 1.0).draw(g);
c.rect(0.0, 0.0, 100.0, 100.0).rgb(1.0, 0.0, 0.0).draw(g);
c.rect(50.0, 50.0, 100.0, 100.0).rgba(0.0, 1.0, 0.0, 0.3).draw(g);
c.trans(100.0, 100.0).image(&image).draw(g);
});
device.submit(renderer.as_buffer());
renderer.reset();
});
}
