frus-gpu

frus's 2D renderer: it takes a Scene and turns it into pixels through wgpu (Vulkan, Metal, DX12, WebGPU).

Layer: Foundations. It depends on no windowing library: the shell hands it a surface, and it owns the device, the pipelines, batching, tessellation and the glyph atlas. See ARCHITECTURE.md.

What you reach for

• Renderer: created on a surface, render(&scene) once per frame.
• render_offscreen: the same pipeline into a texture read back as RGBA bytes, with no window. It returns None when there is no GPU adapter; golden tests are built on it.
• draw_calls: how many draw calls a scene will cost, to check that a screen batches.

Example

use frus_gpu::{draw_calls, Color, Rect, Scene};

let mut scene = Scene::new();
for row in 0..10 {
    let y = row as f32 * 20.0;
    scene.fill_rect(Rect::new(0.0, y, 100.0, 16.0), Color::hex("#3B82F6"));
}
// Ten rectangles that do not overlap are one batch.
assert_eq!(draw_calls(&scene), 1);

Part of frus

frus-shell drives the renderer for an application, and frus-test for tests. See the workspace README. Licensed under MIT or Apache-2.0.