commit 8446db62f19416963e0b35f45c47684b61612eed
author Lenny Komow <lenny@lunarg.com> Thu Jul 30 18:05:12 2020 -0600
committer Lenny Komow <lenny@lunarg.com> Fri Aug 07 13:09:36 2020 -0600
tree ded7512b602db36a351a0c1a965537b8e2deeb21
parent 471a35d21d6463eedddbe9c57d9ba52e8349c651

Add a loader features interface

This is needed to tell a layer if the loader is sorting physical
devices, but it should be generalized so that other loader features
could be marked in the future.

include/vulkan/vk_layer.h

diff --git a/include/vulkan/vk_layer.h b/include/vulkan/vk_layer.h
index fa76520..0651870 100644
--- a/include/vulkan/vk_layer.h
+++ b/include/vulkan/vk_layer.h
@@ -83,7 +83,8 @@
 typedef enum VkLayerFunction_ {
     VK_LAYER_LINK_INFO = 0,
     VK_LOADER_DATA_CALLBACK = 1,
-    VK_LOADER_LAYER_CREATE_DEVICE_CALLBACK = 2
+    VK_LOADER_LAYER_CREATE_DEVICE_CALLBACK = 2,
+    VK_LOADER_FEATURES = 3,
 } VkLayerFunction;
 
 typedef struct VkLayerInstanceLink_ {
@@ -111,6 +112,12 @@
 typedef VkResult (VKAPI_PTR *PFN_vkLayerCreateDevice)(VkInstance instance, VkPhysicalDevice physicalDevice, const VkDeviceCreateInfo *pCreateInfo,
 						      const VkAllocationCallbacks *pAllocator, VkDevice *pDevice, PFN_vkGetInstanceProcAddr layerGIPA, PFN_vkGetDeviceProcAddr *nextGDPA);
 typedef void (VKAPI_PTR *PFN_vkLayerDestroyDevice)(VkDevice physicalDevice, const VkAllocationCallbacks *pAllocator, PFN_vkDestroyDevice destroyFunction);
+
+typedef enum VkLoaderFeastureFlagBits {
+    VK_LOADER_FEATURE_PHYSICAL_DEVICE_SORTING = 0x00000001,
+} VkLoaderFlagBits;
+typedef VkFlags VkLoaderFeatureFlags;
+
 typedef struct {
     VkStructureType sType; // VK_STRUCTURE_TYPE_LOADER_INSTANCE_CREATE_INFO
     const void *pNext;
@@ -119,9 +126,10 @@
         VkLayerInstanceLink *pLayerInfo;
         PFN_vkSetInstanceLoaderData pfnSetInstanceLoaderData;
         struct {
-	  PFN_vkLayerCreateDevice pfnLayerCreateDevice;
-	  PFN_vkLayerDestroyDevice pfnLayerDestroyDevice;
-	} layerDevice;
+	        PFN_vkLayerCreateDevice pfnLayerCreateDevice;
+	        PFN_vkLayerDestroyDevice pfnLayerDestroyDevice;
+	    } layerDevice;
+        VkLoaderFeatureFlags loaderFeatures;
     } u;
 } VkLayerInstanceCreateInfo;