adding VK_KHR_get_physical_device_properties2 and bug fixes

src/soft/SoftInstance.zig

@@ -12,13 +12,26 @@ pub const Interface = base.Instance;
 
 interface: Interface,
 
+fn castExtension(comptime ext: vk.ApiInfo) vk.ExtensionProperties {
+    var props: vk.ExtensionProperties = .{
+        .extension_name = undefined,
+        .spec_version = @bitCast(ext.version),
+    };
+    @memcpy(props.extension_name[0..ext.name.len], ext.name);
+    return props;
+}
+
+pub const EXTENSIONS = [_]vk.ExtensionProperties{
+    castExtension(vk.extensions.khr_get_physical_device_properties_2),
+};
+
 pub fn create(allocator: std.mem.Allocator, infos: *const vk.InstanceCreateInfo) VkError!*Interface {
     const self = allocator.create(Self) catch return VkError.OutOfHostMemory;
     errdefer allocator.destroy(self);
 
     self.interface = try base.Instance.init(allocator, infos);
     self.interface.dispatch_table = &.{
-        .destroyInstance = destroyInstance,
+        .destroy = destroy,
     };
     self.interface.vtable = &.{
         .requestPhysicalDevices = requestPhysicalDevices,
@@ -27,6 +40,11 @@ pub fn create(allocator: std.mem.Allocator, infos: *const vk.InstanceCreateInfo)
     return &self.interface;
 }
 
+fn destroy(interface: *Interface, allocator: std.mem.Allocator) VkError!void {
+    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
+    allocator.destroy(self);
+}
+
 fn requestPhysicalDevices(interface: *Interface, allocator: std.mem.Allocator) VkError!void {
     // Software driver has only one physical device (the CPU)
     const physical_device = try SoftPhysicalDevice.create(allocator, interface);
@@ -42,8 +60,3 @@ fn releasePhysicalDevices(interface: *Interface, allocator: std.mem.Allocator) V
     interface.physical_devices.deinit(allocator);
     interface.physical_devices = .empty;
 }
-
-fn destroyInstance(interface: *Interface, allocator: std.mem.Allocator) VkError!void {
-    const self: *Self = @alignCast(@fieldParentPtr("interface", interface));
-    allocator.destroy(self);
-}