Constant conrod_glium::VERTEX_SHADER_300_ES

pub const VERTEX_SHADER_300_ES: &'static str = "
    #version 300 es
    precision mediump float;

    in vec2 position;
    in vec2 tex_coords;
    in vec4 color;
    in uint mode;

    out vec2 v_tex_coords;
    out vec4 v_color;
    flat out uint v_mode;

    void main() {
        gl_Position = vec4(position, 0.0, 1.0);
        v_tex_coords = tex_coords;
        v_color = color;
        v_mode = mode;
    }
";

The vertex shader used within the glium::Program for OpenGL ES.