glium 0.32.0

Elegant and safe OpenGL wrapper. Glium is an intermediate layer between OpenGL and your application. You still need to manually handle the graphics pipeline, but without having to use OpenGL's old and error-prone API. Its objectives: - Be safe to use. Many aspects of OpenGL that can trigger a crash if misused are automatically handled by glium. - Provide an API that enforces good pratices such as RAII or stateless function calls. - Be compatible with all OpenGL versions that support shaders, providing unified API when things diverge. - Avoid all OpenGL errors beforehand. - Produce optimized OpenGL function calls, and allow the user to easily use modern OpenGL techniques.
Documentation 
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#[macro_use]
extern crate glium;

use glium::Surface;

mod support;

#[test]
fn magnify_nearest_filtering() {
    // ignoring test on travis
    // TODO: find out why they are failing
    if ::std::env::var("TRAVIS").is_ok() {
        return;
    }

    let display = support::build_display();
    let (vb, ib) = support::build_rectangle_vb_ib(&display);

    let program = program!(&display,
        110 => {
            vertex: "
                #version 110

                attribute vec2 position;

                void main() {
                    gl_Position = vec4(position, 0.0, 1.0);
                }
            ",
            fragment: "
                #version 110

                uniform sampler2D texture;

                void main() {
                    gl_FragColor = texture2D(texture, vec2(0.51, 0.0));
                }
            ",
        },
        100 => {
            vertex: "
                #version 100

                attribute lowp vec2 position;

                void main() {
                    gl_Position = vec4(position, 0.0, 1.0);
                }
            ",
            fragment: "
                #version 100

                uniform lowp sampler2D texture;

                void main() {
                    gl_FragColor = texture2D(texture, vec2(0.51, 0.0));
                }
            ",
        }).unwrap();

    let texture_data = vec![vec![(0u8, 0, 0), (255, 255, 255)]];
    let texture = glium::texture::Texture2d::new(&display, texture_data).unwrap();

    let uniforms = uniform! {
        texture: texture.sampled().magnify_filter(glium::uniforms::MagnifySamplerFilter::Nearest)
    };

    let output = support::build_renderable_texture(&display);
    output.as_surface().clear_color(0.0, 0.0, 0.0, 0.0);

    match output.as_surface().draw(&vb, &ib, &program, &uniforms, &Default::default()) {
        Ok(_) => (),
        Err(glium::DrawError::SamplersNotSupported) => return,
        Err(e) => panic!("{:?}", e)
    };

    let data: Vec<Vec<(u8, u8, u8, u8)>> = output.read();
    assert_eq!(data[0][0], (255, 255, 255, 255));

    display.assert_no_error(None);
}