d5673412dd
* Move all interior mutability from Context to CtxRef and make it a handle * Rename `CtxRef` to `Context` * The old `Context` is now `ContextImpl` and is non-pub * Add benchmark Painter::rect Co-authored-by: Daniel Keller <dklr433@gmail.com>
47 lines
1.6 KiB
Rust
47 lines
1.6 KiB
Rust
#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
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use eframe::{egui, epi};
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#[derive(Default)]
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struct MyApp {
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texture: Option<(egui::Vec2, egui::TextureId)>,
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}
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impl epi::App for MyApp {
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fn name(&self) -> &str {
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"Show an image with eframe/egui"
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}
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fn update(&mut self, ctx: &egui::Context, frame: &epi::Frame) {
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if self.texture.is_none() {
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// Load the image:
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let image_data = include_bytes!("rust-logo-256x256.png");
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use image::GenericImageView;
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let image = image::load_from_memory(image_data).expect("Failed to load image");
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let image_buffer = image.to_rgba8();
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let size = [image.width() as usize, image.height() as usize];
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let pixels = image_buffer.into_vec();
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let image = epi::Image::from_rgba_unmultiplied(size, &pixels);
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// Allocate a texture:
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let texture = frame.alloc_texture(image);
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let size = egui::Vec2::new(size[0] as f32, size[1] as f32);
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self.texture = Some((size, texture));
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}
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egui::CentralPanel::default().show(ctx, |ui| {
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if let Some((size, texture)) = self.texture {
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ui.heading("This is an image:");
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ui.image(texture, size);
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ui.heading("This is an image you can click:");
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ui.add(egui::ImageButton::new(texture, size));
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}
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});
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}
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}
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fn main() {
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let options = eframe::NativeOptions::default();
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eframe::run_native(Box::new(MyApp::default()), options);
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}
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