Minor wgpu-web releated stuff (#1977)

* egui_demo_app: remove wgpu and pollster as direct dependencies

* eframe: use same web-sys version as wgpu crate

* Make note that web_sys_unstable_apis is required by the wgpu crate

* Rename the glow web painter in eframe

* Remove trait DummyWebGLConstructor from web_glow_painter.rs

* cargo fmt

* Fix check.sh

crates/eframe/src/web/backend.rs

@@ -1,4 +1,4 @@
-use super::{glow_wrapping::WrappedGlowPainter, *};
+use super::{WebPainter, *};
 
 use crate::epi;
 
@@ -162,7 +162,7 @@ fn test_parse_query() {
 pub struct AppRunner {
     pub(crate) frame: epi::Frame,
     egui_ctx: egui::Context,
-    painter: WrappedGlowPainter,
+    painter: WebPainter,
     pub(crate) input: WebInput,
     app: Box<dyn epi::App>,
     pub(crate) needs_repaint: std::sync::Arc<NeedRepaint>,
@@ -187,8 +187,8 @@ impl AppRunner {
         web_options: crate::WebOptions,
         app_creator: epi::AppCreator,
     ) -> Result<Self, JsValue> {
-        let painter = WrappedGlowPainter::new(canvas_id, web_options.webgl_context_option)
-            .map_err(JsValue::from)?; // fail early
+        let painter =
+            WebPainter::new(canvas_id, web_options.webgl_context_option).map_err(JsValue::from)?; // fail early
 
         let system_theme = if web_options.follow_system_theme {
             super::system_theme()

crates/eframe/src/web/mod.rs

@@ -4,15 +4,16 @@
 
 pub mod backend;
 mod events;
-mod glow_wrapping;
 mod input;
 pub mod screen_reader;
 pub mod storage;
 mod text_agent;
+mod web_glow_painter;
 
 pub use backend::*;
 pub use events::*;
 pub use storage::*;
+pub(crate) use web_glow_painter::WebPainter;
 
 use std::collections::BTreeMap;
 use std::sync::{

crates/eframe/src/web/web_glow_painter.rs

@@ -1,19 +1,21 @@
-use crate::WebGlContextOption;
-use egui::{ClippedPrimitive, Rgba};
-use egui_glow::glow;
 use wasm_bindgen::JsCast;
 use wasm_bindgen::JsValue;
 use web_sys::HtmlCanvasElement;
 #[cfg(not(target_arch = "wasm32"))]
 use web_sys::{WebGl2RenderingContext, WebGlRenderingContext};
 
-pub(crate) struct WrappedGlowPainter {
+use egui::{ClippedPrimitive, Rgba};
+use egui_glow::glow;
+
+use crate::WebGlContextOption;
+
+pub(crate) struct WebPainter {
     pub(crate) canvas: HtmlCanvasElement,
     pub(crate) canvas_id: String,
     pub(crate) painter: egui_glow::Painter,
 }
 
-impl WrappedGlowPainter {
+impl WebPainter {
     pub fn new(canvas_id: &str, options: WebGlContextOption) -> Result<Self, String> {
         let canvas = super::canvas_element_or_die(canvas_id);
 
@@ -32,7 +34,7 @@ impl WrappedGlowPainter {
     }
 }
 
-impl WrappedGlowPainter {
+impl WebPainter {
     pub fn gl(&self) -> &std::sync::Arc<glow::Context> {
         self.painter.gl()
     }
@@ -158,9 +160,3 @@ fn init_webgl2(canvas: &HtmlCanvasElement) -> Option<(glow::Context, &'static st
 
     Some((gl, shader_prefix))
 }
-
-trait DummyWebGLConstructor {
-    fn from_webgl1_context(context: web_sys::WebGlRenderingContext) -> Self;
-
-    fn from_webgl2_context(context: web_sys::WebGl2RenderingContext) -> Self;
-}