fix(hal/vulkan): Use queue family index modified by device open callback (#9965)

Author: andyleiserson

wgpu-hal/src/vulkan/adapter.rs

@@ -3011,11 +3011,10 @@ impl super::Adapter {
         let mut enabled_extensions = self.required_device_extensions(features);
         let mut enabled_phd_features = self.physical_device_features(&enabled_extensions, features);
 
-        let family_index = 0; //TODO
-        let family_info = vk::DeviceQueueCreateInfo::default()
-            .queue_family_index(family_index)
-            .queue_priorities(&[1.0]);
-        let mut family_infos = Vec::from([family_info]);
+        let default_family_index = 0;
+        let mut family_infos = vec![vk::DeviceQueueCreateInfo::default()
+            .queue_family_index(default_family_index)
+            .queue_priorities(&[1.0])];
 
         let mut pre_info = vk::DeviceCreateInfo::default();
 
@@ -3069,7 +3068,7 @@ impl super::Adapter {
                 features,
                 limits,
                 memory_hints,
-                family_info.queue_family_index,
+                family_infos[0].queue_family_index,
                 0,
             )
         }

wgpu-hal/src/vulkan/mod.rs

@@ -1710,7 +1710,10 @@ where
     pub extensions: &'arg mut Vec<&'static CStr>,
     /// The physical device features to enable. You may enable features, but must not disable any.
     pub device_features: &'arg mut PhysicalDeviceFeatures,
-    /// The queue create infos for the device. You may add or modify queue create infos as needed.
+    /// The queue create infos for the device. You may substitute a different queue, but:
+    /// 1. Any queue you provide must be compatible with `wgpu`'s usage,
+    /// 2. You must not leave the vector empty,
+    /// 3. `wgpu` currently only uses the first entry.
     pub queue_create_infos: &'arg mut Vec<vk::DeviceQueueCreateInfo<'pnext>>,
     /// The create info for the device. You may add or modify things in the pnext chain, but
     /// do not turn features off. Additionally, do not add things to the list of extensions,