Move egui::app into new epi crate

This commit is contained in:
Emil Ernerfeldt 2020-12-29 14:15:46 +01:00
parent 6953dc7d5d
commit d7459bc13d
21 changed files with 157 additions and 72 deletions

15
Cargo.lock generated
View file

@ -629,7 +629,6 @@ dependencies = [
"parking_lot",
"rusttype",
"serde",
"serde_json",
]
[[package]]
@ -640,6 +639,7 @@ dependencies = [
"egui_demo_lib",
"egui_glium",
"egui_web",
"epi",
"js-sys",
"serde",
"wasm-bindgen",
@ -651,6 +651,7 @@ version = "0.6.0"
dependencies = [
"criterion",
"egui",
"epi",
]
[[package]]
@ -661,6 +662,7 @@ dependencies = [
"clipboard",
"directories-next",
"egui",
"epi",
"glium",
"serde",
"serde_json",
@ -672,6 +674,7 @@ name = "egui_web"
version = "0.6.0"
dependencies = [
"egui",
"epi",
"js-sys",
"serde",
"serde_json",
@ -686,12 +689,22 @@ version = "1.6.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
[[package]]
name = "epi"
version = "0.6.0"
dependencies = [
"egui",
"serde",
"serde_json",
]
[[package]]
name = "example_web"
version = "0.1.0"
dependencies = [
"egui",
"egui_web",
"epi",
"image",
"js-sys",
"serde",

View file

@ -5,6 +5,7 @@ members = [
"egui_glium",
"egui_web",
"egui",
"epi",
"example_web",
]

View file

@ -151,4 +151,4 @@ Ability to do a search for any widget. The search works even for collapsed regio
* [x] Use HW clip rects
* [x] Image support
* [x] Show user textures
* [x] API for creating a texture managed by `egui::app::Backend`
* [x] API for creating a texture managed by `epi` backend

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@ -24,7 +24,6 @@ atomic_refcell = { version = "0.1", optional = true } # Used instead of parking_
parking_lot = { version = "0.11", optional = true } # Using parking_lot over std::sync::Mutex gives 50% speedups in some real-world scenarios
rusttype = "0.9"
serde = { version = "1", features = ["derive"], optional = true }
serde_json = { version = "1", optional = true }
[features]
default = ["atomic_refcell", "default_fonts"]

View file

@ -79,7 +79,6 @@
pub mod align;
mod animation_manager;
pub mod app;
pub mod containers;
mod context;
mod id;

View file

@ -9,8 +9,9 @@ edition = "2018"
crate-type = ["cdylib", "rlib"]
[dependencies]
egui = { path = "../egui", features = ["serde", "serde_json"] }
egui = { version = "0.6.0", path = "../egui", features = ["serde"] }
egui_demo_lib = { path = "../egui_demo_lib" }
epi = { version = "0.6.0", path = "../epi", features = ["serde", "serde_json"] }
serde = { version = "1", features = ["derive"] }
# For compiling natively:

View file

@ -16,6 +16,7 @@ include = [ "**/*.rs", "Cargo.toml"]
[dependencies]
egui = { version = "0.6.0", path = "../egui" }
epi = { version = "0.6.0", path = "../epi" }
[dev-dependencies]
criterion = { version = "0.3", default-features = false }

View file

@ -171,7 +171,7 @@ impl FrameHistory {
/// Demonstrates how to make an app using Egui.
///
/// Implements `egui::app::App` so it can be used with
/// Implements `epi::App` so it can be used with
/// [`egui_glium`](https://crates.io/crates/egui_glium) and [`egui_web`](https://crates.io/crates/egui_web).
#[derive(Default)]
#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
@ -192,7 +192,7 @@ pub struct DemoApp {
}
impl DemoApp {
fn backend_ui(&mut self, ui: &mut Ui, integration_context: &mut app::IntegrationContext<'_>) {
fn backend_ui(&mut self, ui: &mut Ui, integration_context: &mut epi::IntegrationContext<'_>) {
let is_web = integration_context.info.web_info.is_some();
if is_web {
@ -227,7 +227,7 @@ impl DemoApp {
}
}
fn pixels_per_point_ui(&mut self, ui: &mut Ui, info: &app::IntegrationInfo) -> Option<f32> {
fn pixels_per_point_ui(&mut self, ui: &mut Ui, info: &epi::IntegrationInfo) -> Option<f32> {
self.pixels_per_point = self
.pixels_per_point
.or(info.native_pixels_per_point)
@ -278,22 +278,22 @@ impl DemoApp {
}
}
impl app::App for DemoApp {
impl epi::App for DemoApp {
fn name(&self) -> &str {
"Egui Demo"
}
#[cfg(feature = "serde_json")]
fn load(&mut self, storage: &dyn egui::app::Storage) {
*self = egui::app::get_value(storage, egui::app::APP_KEY).unwrap_or_default()
fn load(&mut self, storage: &dyn epi::Storage) {
*self = epi::get_value(storage, epi::APP_KEY).unwrap_or_default()
}
#[cfg(feature = "serde_json")]
fn save(&mut self, storage: &mut dyn egui::app::Storage) {
egui::app::set_value(storage, egui::app::APP_KEY, self);
fn save(&mut self, storage: &mut dyn epi::Storage) {
epi::set_value(storage, epi::APP_KEY, self);
}
fn ui(&mut self, ctx: &CtxRef, integration_context: &mut egui::app::IntegrationContext<'_>) {
fn ui(&mut self, ctx: &CtxRef, integration_context: &mut epi::IntegrationContext<'_>) {
self.frame_history
.on_new_frame(ctx.input().time, integration_context.info.cpu_usage);

View file

@ -25,7 +25,7 @@ impl ColorTest {
pub fn ui(
&mut self,
ui: &mut Ui,
mut tex_allocator: &mut Option<&mut dyn app::TextureAllocator>,
mut tex_allocator: &mut Option<&mut dyn epi::TextureAllocator>,
) {
ui.label("This is made to test if your Egui painter backend is set up correctly");
ui.label("It is meant to ensure you do proper sRGBA decoding of both texture and vertex colors, and blend using premultiplied alpha.");
@ -132,7 +132,7 @@ impl ColorTest {
fn show_gradients(
&mut self,
ui: &mut Ui,
tex_allocator: &mut Option<&mut dyn app::TextureAllocator>,
tex_allocator: &mut Option<&mut dyn epi::TextureAllocator>,
bg_fill: Srgba,
(left, right): (Srgba, Srgba),
) {
@ -226,7 +226,7 @@ impl ColorTest {
fn tex_gradient(
&mut self,
ui: &mut Ui,
tex_allocator: &mut Option<&mut dyn app::TextureAllocator>,
tex_allocator: &mut Option<&mut dyn epi::TextureAllocator>,
label: &str,
bg_fill: Srgba,
gradient: &Gradient,
@ -358,7 +358,7 @@ struct TextureManager(HashMap<Gradient, TextureId>);
impl TextureManager {
fn get(
&mut self,
tex_allocator: &mut dyn app::TextureAllocator,
tex_allocator: &mut dyn epi::TextureAllocator,
gradient: &Gradient,
) -> TextureId {
*self.0.entry(gradient.clone()).or_insert_with(|| {

View file

@ -1,4 +1,4 @@
use egui::{app, CtxRef, Resize, ScrollArea, Ui, Window};
use egui::{CtxRef, Resize, ScrollArea, Ui, Window};
// ----------------------------------------------------------------------------
@ -84,7 +84,7 @@ impl DemoWindows {
&mut self,
ctx: &CtxRef,
env: &DemoEnvironment,
tex_allocator: &mut Option<&mut dyn app::TextureAllocator>,
tex_allocator: &mut Option<&mut dyn epi::TextureAllocator>,
sidebar_ui: impl FnOnce(&mut Ui),
) {
if self.previous_link != env.link {
@ -144,7 +144,7 @@ impl DemoWindows {
&mut self,
ctx: &CtxRef,
env: &DemoEnvironment,
tex_allocator: &mut Option<&mut dyn app::TextureAllocator>,
tex_allocator: &mut Option<&mut dyn epi::TextureAllocator>,
) {
let Self {
open_windows,

View file

@ -16,7 +16,8 @@ include = [ "**/*.rs", "Cargo.toml"]
chrono = { version = "0.4" }
clipboard = "0.5"
directories-next = "2"
egui = { version = "0.6.0", path = "../egui", features = ["serde", "serde_json"] }
egui = { version = "0.6.0", path = "../egui", features = ["serde"] }
epi = { version = "0.6.0", path = "../epi", features = ["serde", "serde_json"] }
glium = "0.29"
serde = "1"
serde_json = "1"

View file

@ -2,15 +2,12 @@ use std::time::Instant;
use crate::{storage::WindowSettings, *};
pub use egui::{
app::{self, App, Storage},
Srgba,
};
pub use egui::Srgba;
const EGUI_MEMORY_KEY: &str = "egui";
const WINDOW_KEY: &str = "window";
impl egui::app::TextureAllocator for Painter {
impl epi::TextureAllocator for Painter {
fn alloc(&mut self) -> egui::TextureId {
self.alloc_user_texture()
}
@ -35,7 +32,7 @@ struct GliumRepaintSignal(
std::sync::Mutex<glutin::event_loop::EventLoopProxy<RequestRepaintEvent>>,
);
impl egui::app::RepaintSignal for GliumRepaintSignal {
impl epi::RepaintSignal for GliumRepaintSignal {
fn request_repaint(&self) {
self.0.lock().unwrap().send_event(RequestRepaintEvent).ok();
}
@ -72,7 +69,7 @@ fn create_display(
display
}
fn create_storage(app_name: &str) -> Option<Box<dyn egui::app::Storage>> {
fn create_storage(app_name: &str) -> Option<Box<dyn epi::Storage>> {
if let Some(proj_dirs) = directories_next::ProjectDirs::from("", "", app_name) {
let data_dir = proj_dirs.data_dir().to_path_buf();
if let Err(err) = std::fs::create_dir_all(&data_dir) {
@ -94,7 +91,7 @@ fn create_storage(app_name: &str) -> Option<Box<dyn egui::app::Storage>> {
}
/// Run an egui app
pub fn run(mut app: Box<dyn App>) -> ! {
pub fn run(mut app: Box<dyn epi::App>) -> ! {
let mut storage = create_storage(app.name());
if let Some(storage) = &mut storage {
@ -103,7 +100,7 @@ pub fn run(mut app: Box<dyn App>) -> ! {
let window_settings: Option<WindowSettings> = storage
.as_mut()
.and_then(|storage| egui::app::get_value(storage.as_ref(), WINDOW_KEY));
.and_then(|storage| epi::get_value(storage.as_ref(), WINDOW_KEY));
let event_loop = glutin::event_loop::EventLoop::with_user_event();
let display = create_display(app.name(), window_settings, app.is_resizable(), &event_loop);
@ -114,7 +111,7 @@ pub fn run(mut app: Box<dyn App>) -> ! {
let mut ctx = egui::CtxRef::default();
*ctx.memory() = storage
.as_mut()
.and_then(|storage| egui::app::get_value(storage.as_ref(), EGUI_MEMORY_KEY))
.and_then(|storage| epi::get_value(storage.as_ref(), EGUI_MEMORY_KEY))
.unwrap_or_default();
app.setup(&ctx);
@ -137,8 +134,8 @@ pub fn run(mut app: Box<dyn App>) -> ! {
));
ctx.begin_frame(input_state.raw.take());
let mut integration_context = egui::app::IntegrationContext {
info: egui::app::IntegrationInfo {
let mut integration_context = epi::IntegrationContext {
info: epi::IntegrationInfo {
web_info: None,
cpu_usage: previous_frame_time,
seconds_since_midnight: Some(seconds_since_midnight()),
@ -164,7 +161,7 @@ pub fn run(mut app: Box<dyn App>) -> ! {
);
{
let egui::app::AppOutput {
let epi::AppOutput {
quit,
window_size,
pixels_per_point,
@ -200,12 +197,12 @@ pub fn run(mut app: Box<dyn App>) -> ! {
if let Some(storage) = &mut storage {
let now = Instant::now();
if now - last_auto_save > app.auto_save_interval() {
egui::app::set_value(
epi::set_value(
storage.as_mut(),
WINDOW_KEY,
&WindowSettings::from_display(&display),
);
egui::app::set_value(storage.as_mut(), EGUI_MEMORY_KEY, &*ctx.memory());
epi::set_value(storage.as_mut(), EGUI_MEMORY_KEY, &*ctx.memory());
app.save(storage.as_mut());
storage.flush();
last_auto_save = now;
@ -227,12 +224,12 @@ pub fn run(mut app: Box<dyn App>) -> ! {
glutin::event::Event::LoopDestroyed => {
app.on_exit();
if let Some(storage) = &mut storage {
egui::app::set_value(
epi::set_value(
storage.as_mut(),
WINDOW_KEY,
&WindowSettings::from_display(&display),
);
egui::app::set_value(storage.as_mut(), EGUI_MEMORY_KEY, &*ctx.memory());
epi::set_value(storage.as_mut(), EGUI_MEMORY_KEY, &*ctx.memory());
app.save(storage.as_mut());
storage.flush();
}

View file

@ -24,7 +24,7 @@ impl FileStorage {
}
}
impl egui::app::Storage for FileStorage {
impl epi::Storage for FileStorage {
fn get_string(&self, key: &str) -> Option<String> {
self.kv.get(key).cloned()
}

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@ -17,6 +17,7 @@ crate-type = ["cdylib", "rlib"]
[dependencies]
egui = { version = "0.6.0", path = "../egui", features = ["serde"] }
epi = { version = "0.6.0", path = "../epi", features = ["serde", "serde_json"] }
js-sys = "0.3"
serde = "1"
serde_json = "1"

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@ -1,9 +1,6 @@
use crate::*;
pub use egui::{
app::{App, WebInfo},
pos2, Srgba,
};
pub use egui::{pos2, Srgba};
// ----------------------------------------------------------------------------
@ -68,7 +65,7 @@ impl WebBackend {
}
}
impl egui::app::TextureAllocator for webgl::Painter {
impl epi::TextureAllocator for webgl::Painter {
fn alloc(&mut self) -> egui::TextureId {
self.alloc_user_texture()
}
@ -131,7 +128,7 @@ impl NeedRepaint {
}
}
impl egui::app::RepaintSignal for NeedRepaint {
impl epi::RepaintSignal for NeedRepaint {
fn request_repaint(&self) {
self.0.store(true, SeqCst);
}
@ -142,14 +139,14 @@ impl egui::app::RepaintSignal for NeedRepaint {
pub struct AppRunner {
pub web_backend: WebBackend,
pub input: WebInput,
pub app: Box<dyn App>,
pub app: Box<dyn epi::App>,
pub needs_repaint: std::sync::Arc<NeedRepaint>,
pub storage: LocalStorage,
pub last_save_time: f64,
}
impl AppRunner {
pub fn new(web_backend: WebBackend, mut app: Box<dyn App>) -> Result<Self, JsValue> {
pub fn new(web_backend: WebBackend, mut app: Box<dyn epi::App>) -> Result<Self, JsValue> {
load_memory(&web_backend.ctx);
let storage = LocalStorage::default();
app.load(&storage);
@ -185,9 +182,9 @@ impl AppRunner {
let raw_input = self.input.new_frame(canvas_size);
self.web_backend.begin_frame(raw_input);
let mut integration_context = egui::app::IntegrationContext {
info: egui::app::IntegrationInfo {
web_info: Some(WebInfo {
let mut integration_context = epi::IntegrationContext {
info: epi::IntegrationInfo {
web_info: Some(epi::WebInfo {
web_location_hash: location_hash().unwrap_or_default(),
}),
cpu_usage: self.web_backend.previous_frame_time,
@ -206,7 +203,7 @@ impl AppRunner {
handle_output(&egui_output);
{
let egui::app::AppOutput {
let epi::AppOutput {
quit: _, // Can't quit a web page
window_size: _, // Can't resize a web page
pixels_per_point: _, // Can't zoom from within the app (we respect the web browser's zoom level)
@ -223,7 +220,7 @@ impl AppRunner {
/// Install event listeners to register different input events
/// and starts running the given app.
pub fn start(canvas_id: &str, app: Box<dyn App>) -> Result<AppRunnerRef, JsValue> {
pub fn start(canvas_id: &str, app: Box<dyn epi::App>) -> Result<AppRunnerRef, JsValue> {
let backend = WebBackend::new(canvas_id)?;
let runner = AppRunner::new(backend, app)?;
start_runner(runner)

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@ -172,7 +172,7 @@ pub fn save_memory(ctx: &egui::Context) {
#[derive(Default)]
pub struct LocalStorage {}
impl egui::app::Storage for LocalStorage {
impl epi::Storage for LocalStorage {
fn get_string(&self, key: &str) -> Option<String> {
local_storage_get(key)
}

20
epi/Cargo.toml Normal file
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@ -0,0 +1,20 @@
[package]
name = "epi"
version = "0.6.0"
authors = ["Emil Ernerfeldt <emil.ernerfeldt@gmail.com>"]
description = "Backend-agnostic interface for writing apps using Egui"
edition = "2018"
homepage = "https://github.com/emilk/egui"
license = "MIT OR Apache-2.0"
readme = "README.md"
repository = "https://github.com/emilk/egui"
categories = ["gui", "graphics"]
keywords = ["glium", "egui", "gui", "gamedev"]
include = [ "**/*.rs", "Cargo.toml"]
[lib]
[dependencies]
egui = { version = "0.6.0", path = "../egui" }
serde = { version = "1", optional = true }
serde_json = { version = "1", optional = true }

7
epi/README.md Normal file
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@ -0,0 +1,7 @@
# Egui app Programming Interface
Backend-agnostic interface for writing apps using Egui.
Egui is a GUI library, which can be plugged in to e.g. a game engine.
This crate provides a common interface for programming an app, using Egui, so you can then easily plug it in to a backend such as `egui_web` or `egui_glium`.

View file

@ -1,11 +1,56 @@
//! Traits and helper for writing Egui apps.
//! Backend-agnostic interface for writing apps using Egui.
//!
//! This module is very experimental, and you don't need to use it.
//! Egui is a GUI library, which can be plugged in to e.g. a game engine.
//!
//! Egui can be used as a library, but you can also use it as a framework to write apps in.
//! This module defined the `App` trait that can be implemented and used with the `egui_web` and `egui_glium` crates.
//! This crate provides a common interface for programming an app, using Egui,
//! so you can then easily plug it in to a backend such as `egui_web` or `egui_glium`.
//!
//! This crate is primarily used by the `egui_web` and `egui_glium` crates.
// TODO: move egui/src/app.rs to own crate, e.g. egui_framework ?
#![cfg_attr(not(debug_assertions), deny(warnings))] // Forbid warnings in release builds
#![forbid(unsafe_code)]
#![warn(
clippy::all,
clippy::await_holding_lock,
clippy::dbg_macro,
clippy::doc_markdown,
clippy::empty_enum,
clippy::enum_glob_use,
clippy::exit,
clippy::filter_map_next,
clippy::fn_params_excessive_bools,
clippy::if_let_mutex,
clippy::imprecise_flops,
clippy::inefficient_to_string,
clippy::linkedlist,
clippy::lossy_float_literal,
clippy::macro_use_imports,
clippy::match_on_vec_items,
clippy::match_wildcard_for_single_variants,
clippy::mem_forget,
clippy::mismatched_target_os,
clippy::missing_errors_doc,
clippy::missing_safety_doc,
clippy::needless_borrow,
clippy::needless_continue,
clippy::needless_pass_by_value,
clippy::option_option,
clippy::pub_enum_variant_names,
clippy::rest_pat_in_fully_bound_structs,
clippy::todo,
clippy::unimplemented,
clippy::unnested_or_patterns,
clippy::verbose_file_reads,
future_incompatible,
missing_crate_level_docs,
missing_doc_code_examples,
// missing_docs,
nonstandard_style,
rust_2018_idioms,
unused_doc_comments,
)]
// ----------------------------------------------------------------------------
/// Implement this trait to write apps that can be compiled both natively using the [`egui_glium`](https://crates.io/crates/egui_glium) crate,
/// and deployed as a web site using the [`egui_web`](https://crates.io/crates/egui_web) crate.
@ -15,9 +60,9 @@ pub trait App {
/// Background color for the app, e.g. what is sent to `gl.clearColor`.
/// This is the background of your windows if you don't set a central panel.
fn clear_color(&self) -> crate::Rgba {
fn clear_color(&self) -> egui::Rgba {
// NOTE: a bright gray makes the shadows of the windows look weird.
crate::Srgba::from_rgb(12, 12, 12).into()
egui::Srgba::from_rgb(12, 12, 12).into()
}
/// Called once on start. Allows you to restore state.
@ -37,7 +82,7 @@ pub trait App {
/// Called once before the first frame.
/// Allows you to do setup code and to call `ctx.set_fonts()`.
/// Optional.
fn setup(&mut self, _ctx: &crate::CtxRef) {}
fn setup(&mut self, _ctx: &egui::CtxRef) {}
/// Returns true if this app window should be resizable.
fn is_resizable(&self) -> bool {
@ -46,7 +91,7 @@ pub trait App {
/// Called each time the UI needs repainting, which may be many times per second.
/// Put your widgets into a `SidePanel`, `TopPanel`, `CentralPanel`, `Window` or `Area`.
fn ui(&mut self, ctx: &crate::CtxRef, integration_context: &mut IntegrationContext<'_>);
fn ui(&mut self, ctx: &egui::CtxRef, integration_context: &mut IntegrationContext<'_>);
}
pub struct IntegrationContext<'a> {
@ -92,7 +137,7 @@ pub struct AppOutput {
pub quit: bool,
/// Set to some size to resize the outer window (e.g. glium window) to this size.
pub window_size: Option<crate::Vec2>,
pub window_size: Option<egui::Vec2>,
/// If the app sets this, change the `pixels_per_point` of Egui to this next frame.
pub pixels_per_point: Option<f32>,
@ -100,18 +145,18 @@ pub struct AppOutput {
pub trait TextureAllocator {
/// A.locate a new user texture.
fn alloc(&mut self) -> crate::TextureId;
fn alloc(&mut self) -> egui::TextureId;
/// Set or change the pixels of a user texture.
fn set_srgba_premultiplied(
&mut self,
id: crate::TextureId,
id: egui::TextureId,
size: (usize, usize),
srgba_pixels: &[crate::Srgba],
srgba_pixels: &[egui::Srgba],
);
/// Free the given texture.
fn free(&mut self, id: crate::TextureId);
fn free(&mut self, id: egui::TextureId);
}
pub trait RepaintSignal: Send + Sync {
@ -120,6 +165,8 @@ pub trait RepaintSignal: Send + Sync {
fn request_repaint(&self);
}
// ----------------------------------------------------------------------------
/// A place where you can store custom data in a way that persists when you restart the app.
///
/// On the web this is backed by [local storage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage).

View file

@ -11,6 +11,7 @@ crate-type = ["cdylib", "rlib"]
[dependencies]
egui = { path = "../egui", features = ["serde"] }
egui_web = { path = "../egui_web" }
epi = { version = "0.6.0", path = "../epi", features = ["serde", "serde_json"] }
image = { version = "0.23", default_features = false, features = ["jpeg", "png"] }
js-sys = "0.3"
serde = { version = "1", features = ["derive"] }

View file

@ -48,14 +48,14 @@ impl Default for ExampleApp {
}
}
impl egui::app::App for ExampleApp {
impl epi::App for ExampleApp {
fn name(&self) -> &str {
"Egui Fetch Example"
}
/// Called each time the UI needs repainting, which may be many times per second.
/// Put your widgets into a `SidePanel`, `TopPanel`, `CentralPanel`, `Window` or `Area`.
fn ui(&mut self, ctx: &egui::CtxRef, integration_context: &mut egui::app::IntegrationContext) {
fn ui(&mut self, ctx: &egui::CtxRef, integration_context: &mut epi::IntegrationContext) {
if let Some(receiver) = &mut self.in_progress {
// Are we there yet?
if let Ok(result) = receiver.try_recv() {
@ -137,7 +137,7 @@ fn ui_url(ui: &mut egui::Ui, url: &mut String) -> Option<String> {
fn ui_resouce(
ui: &mut egui::Ui,
integration_context: &mut egui::app::IntegrationContext,
integration_context: &mut epi::IntegrationContext,
tex_mngr: &mut TexMngr,
resource: &Resource,
) {
@ -250,7 +250,7 @@ struct TexMngr {
impl TexMngr {
fn texture(
&mut self,
integration_context: &mut egui::app::IntegrationContext,
integration_context: &mut epi::IntegrationContext,
url: &str,
image: &Image,
) -> Option<egui::TextureId> {