/
tutorial-02.rs
68 lines (57 loc) · 1.95 KB
/
tutorial-02.rs
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#[macro_use]
extern crate glium;
use glium::Surface;
fn main() {
// We start by creating the EventLoop, this can only be done once per process.
// This also needs to happen on the main thread to make the program portable.
let event_loop = winit::event_loop::EventLoopBuilder::new()
.build()
.expect("event loop building");
let (_window, display) = glium::backend::glutin::SimpleWindowBuilder::new()
.with_title("Glium tutorial #2")
.build(&event_loop);
#[derive(Copy, Clone)]
struct Vertex {
position: [f32; 2],
}
implement_vertex!(Vertex, position);
let shape = vec![
Vertex { position: [-0.5, -0.5] },
Vertex { position: [ 0.0, 0.5] },
Vertex { position: [ 0.5, -0.25] }
];
let vertex_buffer = glium::VertexBuffer::new(&display, &shape).unwrap();
let indices = glium::index::NoIndices(glium::index::PrimitiveType::TrianglesList);
let vertex_shader_src = r#"
#version 140
in vec2 position;
void main() {
gl_Position = vec4(position, 0.0, 1.0);
}
"#;
let fragment_shader_src = r#"
#version 140
out vec4 color;
void main() {
color = vec4(1.0, 0.0, 0.0, 1.0);
}
"#;
let program = glium::Program::from_source(&display, vertex_shader_src, fragment_shader_src, None).unwrap();
let mut target = display.draw();
target.clear_color(0.0, 0.0, 1.0, 1.0);
target.draw(&vertex_buffer, &indices, &program, &glium::uniforms::EmptyUniforms,
&Default::default()).unwrap();
target.finish().unwrap();
event_loop.run(move |ev, window_target| {
match ev {
winit::event::Event::WindowEvent { event, .. } => match event {
winit::event::WindowEvent::CloseRequested => {
window_target.exit();
},
_ => (),
},
_ => (),
}
})
.unwrap();
}