migrations/egui
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Make epi::Frame cloneable so you can allocate textures in other threads (#999)

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Closes https://github.com/emilk/egui/issues/673

Also adds `epi::Image`
This commit is contained in:
Emil Ernerfeldt
2021-12-26 21:21:28 +01:00
committed by GitHub
parent 647e020824
commit b7441eeee7
28 changed files with 548 additions and 824 deletions
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2
eframe/examples/file_dialog.rs
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@@ -11,7 +11,7 @@ impl epi::App for MyApp {
"Native file dialogs and drag-and-drop files"
}
fn update(&mut self, ctx: &egui::CtxRef, _frame: &mut epi::Frame<'_>) {
fn update(&mut self, ctx: &egui::CtxRef, _frame: &epi::Frame) {
egui::CentralPanel::default().show(ctx, |ui| {
ui.label("Drag-and-drop files onto the window!");

2
eframe/examples/hello_world.rs
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@@ -19,7 +19,7 @@ impl epi::App for MyApp {
"My egui App"
}
fn update(&mut self, ctx: &egui::CtxRef, frame: &mut epi::Frame<'_>) {
fn update(&mut self, ctx: &egui::CtxRef, frame: &epi::Frame) {
let Self { name, age } = self;
egui::CentralPanel::default().show(ctx, |ui| {

16
eframe/examples/image.rs
View File

@@ -10,26 +10,20 @@ impl epi::App for MyApp {
"Show an image with eframe/egui"
}
fn update(&mut self, ctx: &egui::CtxRef, frame: &mut epi::Frame<'_>) {
fn update(&mut self, ctx: &egui::CtxRef, frame: &epi::Frame) {
if self.texture.is_none() {
// Load the image:
let image_data = include_bytes!("rust-logo-256x256.png");
use image::GenericImageView;
let image = image::load_from_memory(image_data).expect("Failed to load image");
let image_buffer = image.to_rgba8();
let size = (image.width() as usize, image.height() as usize);
let size = [image.width() as usize, image.height() as usize];
let pixels = image_buffer.into_vec();
assert_eq!(size.0 * size.1 * 4, pixels.len());
let pixels: Vec<_> = pixels
.chunks_exact(4)
.map(|p| egui::Color32::from_rgba_unmultiplied(p[0], p[1], p[2], p[3]))
.collect();
let image = epi::Image::from_rgba_unmultiplied(size, &pixels);
// Allocate a texture:
let texture = frame
.tex_allocator()
.alloc_srgba_premultiplied(size, &pixels);
let size = egui::Vec2::new(size.0 as f32, size.1 as f32);
let texture = frame.alloc_texture(image);
let size = egui::Vec2::new(size[0] as f32, size[1] as f32);
self.texture = Some((size, texture));
}