emilk/egui · error

No fonts loaded

Error message

No fonts loaded

What it means

Error "No fonts loaded" thrown in emilk/egui.

Source

Thrown at crates/egui/src/context.rs:2877

        shapes: Vec<ClippedShape>,
        pixels_per_point: f32,
    ) -> Vec<ClippedPrimitive> {
        profiling::function_scope!();

        // A tempting optimization is to reuse the tessellation from last frame if the
        // shapes are the same, but just comparing the shapes takes about 50% of the time
        // it takes to tessellate them, so it is not a worth optimization.

        self.write(|ctx| {
            let tessellation_options = ctx.memory.options.tessellation_options;
            let texture_atlas = if let Some(fonts) = ctx.fonts.as_ref() {
                fonts.texture_atlas()
            } else {
                log::warn!("No font size matching {pixels_per_point} pixels per point found.");
                ctx.fonts
                    .iter()
                    .next()
                    .expect("No fonts loaded")
                    .texture_atlas()
            };

            let paint_stats = PaintStats::from_shapes(&shapes);
            let clipped_primitives = {
                profiling::scope!("tessellator::tessellate_shapes");
                tessellator::Tessellator::new(
                    pixels_per_point,
                    tessellation_options,
                    texture_atlas.size(),
                    texture_atlas.prepared_discs(),
                )
                .tessellate_shapes(shapes)
            };
            ctx.paint_stats = paint_stats.with_clipped_primitives(&clipped_primitives);
            clipped_primitives
        })
    }

View on GitHub (pinned to d802a982ce)

When it happens

Trigger: Thrown at crates/egui/src/context.rs:2877 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of emilk/egui@d802a982ce (2026-08-16). Data as JSON: /api/errors/cb915b73dbb9bbff. Report an issue: GitHub.