Struct FontAtlas 

pub struct FontAtlas {
    pub pixels: Vec<u8>,
    pub atlas_size: u32,
    pub glyphs: HashMap<char, GlyphInfo>,
    pub line_height: f32,
}

Built glyph atlas: RGBA8 pixel buffer + glyph map. Upload pixels to GPU via ctx.create_texture_rgba() to get a GL handle.

Fields

pixels: Vec<u8>

atlas_size: u32

glyphs: HashMap<char, GlyphInfo>

line_height: f32

Implementations

impl FontAtlas

pub fn build(font_data: &[u8], size_px: f32) -> Option<FontAtlas>

Build a glyph atlas from raw TTF/OTF bytes at the given pixel size. Returns None if the fonts feature is not enabled or on parse error.

pub fn measure_width(&self, text: &str) -> f32

Measure the width of a text string in pixels.