From 75e6d3c85d302097b246c511a184a1cb53a62b4d Mon Sep 17 00:00:00 2001
From: Konkitoman <konkitoman@users.noreply.github.com>
Date: Thu, 2 Nov 2023 11:18:39 +0200
Subject: [PATCH] Fix crash on eframe wgpu when rendering a sync viewport in a
 sync viewport Better names

---
 crates/eframe/src/native/run.rs | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/crates/eframe/src/native/run.rs b/crates/eframe/src/native/run.rs
index d6af9718a..562fb4b14 100644
--- a/crates/eframe/src/native/run.rs
+++ b/crates/eframe/src/native/run.rs
@@ -2177,7 +2177,7 @@ mod wgpu_integration {
                                 viewport_builder,
                                 pair,
                                 render,
-                                &mut viewports.borrow_mut(),
+                                &viewports,
                                 &builders,
                                 beginning,
                                 &painter,
@@ -2209,14 +2209,14 @@ mod wgpu_integration {
             mut viewport_builder: ViewportBuilder,
             pair: ViewportIdPair,
             render: Box<dyn FnOnce(&egui::Context) + '_>,
-            viewports: &mut Viewports,
+            viewports: &RefCell<Viewports>,
             builders: &RefCell<HashMap<ViewportId, ViewportBuilder>>,
             time: Instant,
             painter: &RefCell<egui_wgpu::winit::Painter>,
             viewport_maps: &RefCell<HashMap<winit::window::WindowId, ViewportId>>,
         ) {
             // Creating a new native window if is needed
-            if viewports.get(&pair).is_none() {
+            if viewports.borrow().get(&pair).is_none() {
                 let mut builders = builders.borrow_mut();
 
                 {
@@ -2226,6 +2226,8 @@ mod wgpu_integration {
                     }
                 }
 
+                let mut viewports = viewports.borrow_mut();
+
                 let Viewport { window, state, .. } =
                     viewports.entry(pair.this).or_insert(Viewport {
                         window: None,
@@ -2259,12 +2261,12 @@ mod wgpu_integration {
 
             // render sync viewport
 
-            let window = viewports.get(&pair).cloned();
-            let Some(window) = window else { return };
+            let viewport = viewports.borrow().get(&pair).cloned();
+            let Some(viewport) = viewport else { return };
             let output;
-            let Some(winit_state) = &mut *window.state.borrow_mut() else { return };
-            let Some(win) = window.window else { return };
-            let win = win.borrow();
+            let Some(winit_state) = &mut *viewport.state.borrow_mut() else { return };
+            let Some(window) = viewport.window else { return };
+            let win = window.borrow();
             let mut input = winit_state.take_egui_input(&win);
             input.time = Some(time.elapsed().as_secs_f64());
             output = egui_ctx.run(input, pair, |ctx| {