"Failed to create Skia context from WGPU" using WGPUConfiguration::Manual

### Bug Description After upgrading to the latest commit 789e670c running application using WGPUConfiguration::Manual is failed with error: ``` [skia-counter] adapter: Intel(R) Graphics (RPL-S) Error: Failed to create Skia context from WGPU ``` Observations: - It happens if Intel iGPU is used - There's no such error if Nvidia dGPU is used, but the text is not rendered at all - Most probably the cause is upgrading to latest `rust-skia` and `unstable-wgpu-29`, before upgrading `unstable-wgpu-28` was used and there was no problem ### Reproducible Code (if applicable) ```slint slint::slint! { import { Button, VerticalBox } from "std-widgets.slint"; export component MainWindow inherits Window { in-out property <int> counter: 0; title: "Slint (upstream) · Skia · WGPU (Intel)"; preferred-width: 360px; preferred-height: 220px; VerticalBox { alignment: center; spacing: 12px; Text { text: "Counter"; font-size: 14px; horizontal-alignment: center; } Text { // A number assigned to `text` is converted to a string by Slint. text: root.counter; font-size: 32px; horizontal-alignment: center; } Button { text: "Increment"; clicked => { root.counter += 1; } } } } } ``` ```rust use slint::wgpu_29::{WGPUConfiguration, wgpu}; const INTEL_VENDOR_ID: u32 = 0x8086; fn pick_intel_adapter(instance: &wgpu::Instance) -> wgpu::Adapter { let adapters = async_io::block_on(instance.enumerate_adapters(wgpu::Backends::VULKAN)); let intel = adapters .iter() .position(|a| a.get_info().vendor == INTEL_VENDOR_ID); let adapter = match intel { Some(i) => adapters.into_iter().nth(i).expect("index from position()"), None => adapters .into_iter() .next() .expect("no Vulkan adapter available"), }; eprintln!("[skia-counter] adapter: {}", adapter.get_info().name); adapter } fn main() -> Result<(), Box<dyn std::error::Error>> { // 1. Standard wgpu init, preferring the Intel GPU. let instance = wgpu::Instance::new(wgpu::InstanceDescriptor { backends: wgpu::Backends::VULKAN, ..wgpu::InstanceDescriptor::new_without_display_handle() }); let adapter = pick_intel_adapter(&instance); let (device, queue) = async_io::block_on(adapter.request_device(&wgpu::DeviceDescriptor { label: Some("skia-counter"), ..Default::default() }))?; // 2. Hand the same instance/adapter/device/queue to Slint and force the Skia // renderer. slint::BackendSelector::new() .renderer_name("skia".into()) .require_wgpu_29(WGPUConfiguration::Manual { instance, adapter, device, queue, }) .select()?; // 3. Run the counter UI. MainWindow::new()?.run()?; Ok(()) } ``` ### Environment Details - Slint Version: 1.17.0 789e670c - Platform/OS: Linux - Programming Language: Rust - Backend/Renderer: renderer-skia, unstable-wgpu-29 Cargo.toml ```toml slint = { git = "https://github.com/slint-ui/slint", default-features = false, features = [ "compat-1-2", "std", "backend-winit", "renderer-skia", "unstable-wgpu-29", ] } ``` ### Product Impact _No response_