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Warn if using a software rasterizer (#8101)

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* Related to https://github.com/emilk/egui/issues/8093
This commit is contained in:
Emil Ernerfeldt
2026-04-14 11:35:52 +02:00
committed by GitHub
parent 770090a6ff
commit 152b97b434
1 changed files with 19 additions and 22 deletions
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41
crates/egui-wgpu/src/lib.rs
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@@ -138,29 +138,12 @@ async fn request_adapter(
}
})?;
if cfg!(target_arch = "wasm32") {
log::debug!(
"Picked wgpu adapter: {}",
adapter_info_summary(&adapter.get_info())
if 1 < available_adapters.len() {
log::info!(
"There are {} available wgpu adapters: {}",
available_adapters.len(),
describe_adapters(available_adapters)
);
} else {
// native:
if available_adapters.len() == 1 {
log::debug!(
"Picked the only available wgpu adapter: {}",
adapter_info_summary(&adapter.get_info())
);
} else {
log::info!(
"There were {} available wgpu adapters: {}",
available_adapters.len(),
describe_adapters(available_adapters)
);
log::debug!(
"Picked wgpu adapter: {}",
adapter_info_summary(&adapter.get_info())
);
}
}
Ok(adapter)
@@ -236,6 +219,8 @@ impl RenderState {
}) => (adapter, device, queue),
};
log_adapter_info(&adapter.get_info());
let surface_formats = {
profiling::scope!("get_capabilities");
compatible_surface.map_or_else(
@@ -406,6 +391,18 @@ pub fn depth_format_from_bits(depth_buffer: u8, stencil_buffer: u8) -> Option<wg
// ---------------------------------------------------------------------------
fn log_adapter_info(info: &wgpu::AdapterInfo) {
let summary = adapter_info_summary(info);
let is_test = cfg!(test); // Software rasterizers are expected (and preferred) during testing!
if info.device_type == wgpu::DeviceType::Cpu && !is_test {
log::warn!("Software rasterizer detected - loss of performance expected. {summary}");
} else {
log::debug!("wgpu adapter: {summary}");
}
}
/// A human-readable summary about an adapter
pub fn adapter_info_summary(info: &wgpu::AdapterInfo) -> String {
let wgpu::AdapterInfo {