neovim-gtk/src/render/mod.rs

use sys::pango::*;
use pango;
use pango::prelude::*;
use cairo;
use pangocairo::{CairoContextExt, FontMap};
use std::ffi::CString;

pub fn render(ctx: &cairo::Context, font_desc: pango::FontDescription) {
    let font_map = FontMap::get_default();
    let pango_context = font_map.create_context().unwrap();
    pango_context.set_font_description(&font_desc);

    let text = "TEST String".to_owned().into_bytes();
    let len = text.len();
    let text = CString::new(text).unwrap();
    let attr_list = pango::AttrList::new();

    ctx.move_to(0.0, 50.0);
    let items = pango_itemize(&pango_context, &text, 0, len, &attr_list);
    for item in items {
        let mut glyphs = pango::GlyphString::new();
        let analysis = item.analysis();
        pango_shape(&text, len, &analysis, &mut glyphs);
        let font = analysis.font();
        let (ink, logical) = glyphs.extents(&font);
        ctx.show_glyph_string(&font, &glyphs);
    }
}