45 lines
1.3 KiB
Rust
45 lines
1.3 KiB
Rust
#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
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#![allow(rustdoc::missing_crate_level_docs)] // it's an example
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#![allow(clippy::undocumented_unsafe_blocks)]
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// Test that we can paint to the screen using glow directly.
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use eframe::egui;
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use eframe::glow;
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fn main() -> Result<(), Box<dyn std::error::Error>> {
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env_logger::init(); // Log to stderr (if you run with `RUST_LOG=debug`).
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let options = eframe::NativeOptions {
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renderer: eframe::Renderer::Glow,
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..Default::default()
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};
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eframe::run_native(
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"My test app",
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options,
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Box::new(|_cc| Box::<MyTestApp>::default()),
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)?;
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Ok(())
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}
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#[derive(Default)]
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struct MyTestApp {}
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impl eframe::App for MyTestApp {
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fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
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use glow::HasContext as _;
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let gl = frame.gl().unwrap();
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#[allow(unsafe_code)]
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unsafe {
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gl.disable(glow::SCISSOR_TEST);
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gl.viewport(0, 0, 100, 100);
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gl.clear_color(1.0, 0.0, 1.0, 1.0); // purple
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gl.clear(glow::COLOR_BUFFER_BIT);
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}
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egui::Window::new("Floating Window").show(ctx, |ui| {
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ui.label("The background should be purple.");
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});
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}
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}
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