Regression: wgpu panic on window minimize

[aevyrie]

Bevy version

Regression occurs in 81d57e1 as a result of #3412

This bug is not present in 0.6.1, or any commits prior to the above PR merge.

Operating system & version

Win 11

What you did

Minimize an example window.

What you expected to happen

Nothing

What actually happened

thread 'main' panicked at 'wgpu error: Validation Error

Caused by:
    In Device::create_texture
      note: label = `sampled_color_attachment_texture`
    Dimension X is zero
wgpu-0.12.0\src\backend\direct.rs:2273:5

[aevyrie]

@HackerFoo you are most likely to know where this is coming from. 🙂

We've seen this bug in the past, caused by the height being set to zero. See #2299 for links to even more similar issues.

[HackerFoo]

I'm looking into it. I was able to reproduce the bug on MacOS using:

diff --git a/crates/bevy_window/src/window.rs b/crates/bevy_window/src/window.rs
index 47c03d085..ae34badc6 100644
--- a/crates/bevy_window/src/window.rs
+++ b/crates/bevy_window/src/window.rs
@@ -418,8 +418,14 @@ impl Window {
     #[allow(missing_docs)]
     #[inline]
     pub fn update_actual_size_from_backend(&mut self, physical_width: u32, physical_height: u32) {
-        self.physical_width = physical_width;
-        self.physical_height = physical_height;
+        println!("update {physical_width}, {physical_height}");
+        if physical_width < 400 || physical_height < 400 {
+            self.physical_width = 0;
+            self.physical_height = 0;
+        } else {
+            self.physical_width = physical_width;
+            self.physical_height = physical_height;
+        }
     }

     #[allow(missing_docs)]

and then shrinking the 3d_scene example window until it crashes.

[thrombe]

i hit the same panic just by resizing the window when fit_canvas_to_parent is set to true.

Caused by:
    In Device::create_texture
      note: label = `sampled_color_attachment_texture`
    Dimension Y value 2050 exceeds the limit of 2048

', wgpu-0.13.1/src/backend/direct.rs:2391:5