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Add error message when calling .render() without .update_buffers() (#8005)

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* Closes https://github.com/emilk/egui/issues/7968
This commit is contained in:
Emil Ernerfeldt
2026-03-24 11:54:09 +01:00
committed by GitHub
parent cc7cfd27ca
commit 90217f2ad1
1 changed files with 14 additions and 6 deletions
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20
crates/egui-wgpu/src/renderer.rs
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@@ -1,5 +1,3 @@
#![expect(clippy::unwrap_used)] // TODO(emilk): avoid unwraps
use std::{borrow::Cow, num::NonZeroU64, ops::Range};
use ahash::HashMap;
@@ -516,8 +514,12 @@ impl Renderer {
// Skip rendering zero-sized clip areas.
if let Primitive::Mesh(_) = primitive {
// If this is a mesh, we need to advance the index and vertex buffer iterators:
index_buffer_slices.next().unwrap();
vertex_buffer_slices.next().unwrap();
index_buffer_slices
.next()
.expect("You must call .update_buffers() before .render()");
vertex_buffer_slices
.next()
.expect("You must call .update_buffers() before .render()");
}
continue;
}
@@ -527,8 +529,12 @@ impl Renderer {
match primitive {
Primitive::Mesh(mesh) => {
let index_buffer_slice = index_buffer_slices.next().unwrap();
let vertex_buffer_slice = vertex_buffer_slices.next().unwrap();
let index_buffer_slice = index_buffer_slices
.next()
.expect("You must call .update_buffers() before .render()");
let vertex_buffer_slice = vertex_buffer_slices
.next()
.expect("You must call .update_buffers() before .render()");
if let Some(Texture { bind_group, .. }) = self.textures.get(&mesh.texture_id) {
render_pass.set_bind_group(1, bind_group, &[]);
@@ -954,6 +960,7 @@ impl Renderer {
let index_buffer_staging = queue.write_buffer_with(
&self.index_buffer.buffer,
0,
#[expect(clippy::unwrap_used)] // Checked above
NonZeroU64::new(required_index_buffer_size).unwrap(),
);
@@ -998,6 +1005,7 @@ impl Renderer {
let vertex_buffer_staging = queue.write_buffer_with(
&self.vertex_buffer.buffer,
0,
#[expect(clippy::unwrap_used)] // Checked above
NonZeroU64::new(required_vertex_buffer_size).unwrap(),
);