Function glium_text_rusttype::draw

pub fn draw<F, S: ?Sized, M>(
    text: &TextDisplay<F>, 
    system: &TextSystem, 
    target: &mut S, 
    matrix: M, 
    color: (f32, f32, f32, f32)
) -> Result<(), DrawError> where
    S: Surface,
    M: Into<[[f32; 4]; 4]>,
    F: Deref<Target = FontTexture>, 

Draws linear-filtered text.

About the matrix

The matrix must be column-major post-muliplying (which is the usual way to do in OpenGL).

One unit in height corresponds to a line of text, but the text can go above or under. The bottom of the line is at 0.0, the top is at 1.0. You need to adapt your matrix by taking these into consideration.