#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub struct GlyphKey {
pub font: u32,
pub glyph_id: u32,
pub size: u32,
}
#[derive(Clone, Debug)]
pub struct GlyphBitmap {
pub width: u32,
pub height: u32,
pub left: i32,
pub top: i32,
pub advance: f32,
pub pixels: Vec<u8>,
}