ci: skip vello gpu tests on windows

.github/workflows/ci.yml

@@ -233,6 +233,16 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest, macos-latest, ubuntu-latest]
+        include:
+          - os: ubuntu-latest
+            gpu: 'yes'
+          - os: macos-latest
+            gpu: 'yes'
+          - os: windows-latest
+            # Windows hosted runners do not provide a reliable Vello GPU runtime.
+            gpu: 'no'
+    env:
+      IMAGING_CI_GPU_SUPPORT: ${{ matrix.gpu }}
     steps:
       - uses: actions/checkout@v6
 

imaging_vello/build.rs

@@ -0,0 +1,26 @@
+// Copyright 2026 the Imaging Authors
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+//! Build-script configuration for `imaging_vello` tests.
+
+use std::env;
+
+fn main() {
+    println!("cargo:rerun-if-env-changed=IMAGING_CI_GPU_SUPPORT");
+    println!("cargo:rustc-check-cfg=cfg(skip_gpu_tests)");
+
+    let Ok(mut value) = env::var("IMAGING_CI_GPU_SUPPORT") else {
+        return;
+    };
+    value.make_ascii_lowercase();
+
+    match value.as_str() {
+        "yes" | "y" => {}
+        "no" | "n" => {
+            println!("cargo:rustc-cfg=skip_gpu_tests");
+        }
+        _ => {
+            println!("cargo:warning=IMAGING_CI_GPU_SUPPORT should be set to yes/y or no/n");
+        }
+    }
+}

imaging_vello/src/lib.rs

@@ -605,6 +605,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn render_renders_encoded_scene() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;
@@ -628,6 +629,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn render_source_renders_scene() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;
@@ -678,6 +680,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn texture_view_render_smoke() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;
@@ -721,6 +724,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn render_source_to_texture_smoke() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;
@@ -767,6 +771,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn render_source_texture_returns_independent_texture() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;
@@ -791,6 +796,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn render_source_into_rejects_short_row_stride_as_target_error() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;
@@ -822,6 +828,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn render_source_into_rejects_short_buffer_as_target_error() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;
@@ -859,6 +866,7 @@ mod tests {
     }
 
     #[test]
+    #[cfg_attr(skip_gpu_tests, ignore)]
     fn app_owned_wgpu_renders() {
         let Ok((device, queue)) = try_init_device_and_queue() else {
             return;