From ba2675541bc5d6cdea7beb1efa7118142d7b7b23 Mon Sep 17 00:00:00 2001
From: John Tsiombikas <nuclear@member.fsf.org>
Date: Sun, 19 Dec 2021 09:43:34 +0200
Subject: [PATCH] foo

---
 src/vk.c |   25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

diff --git a/src/vk.c b/src/vk.c
index 1fcba58..edc3bf1 100644
--- a/src/vk.c
+++ b/src/vk.c
@@ -20,7 +20,7 @@ static uint32_t inst_ext_count, dev_ext_count, inst_layers_count;
 static VkPhysicalDevice *pdev_list;
 static uint32_t num_pdev;
 
-static int have_debug_report;
+static int have_raytrace, have_debug_report;
 
 #define ARRSZ(arr)	(sizeof arr / sizeof *arr)
 static const char *known_layer_list[] = {
@@ -103,6 +103,8 @@ static int create_instance(void)
 	for(i=0; i<inst_ext_count; i++) {
 		printf(" - %s\n", inst_ext[i].extensionName);
 	}
+
+	have_raytrace = have_inst_ext("VK_KHR_ray_tracing_pipeline");
 	have_debug_report = have_inst_ext("VK_KHR_debug_report");
 
 	for(i=0; i<ARRSZ(known_layer_list); i++) {
@@ -139,6 +141,7 @@ static int create_device(void)
 {
 	int i;
 	VkPhysicalDeviceProperties2 pdevprop2;
+	VkPhysicalDeviceRayTracingPipelinePropertiesKHR raypipe_prop;
 	VkPhysicalDeviceAccelerationStructurePropertiesKHR rayacc_prop;
 
 	vkEnumeratePhysicalDevices(vk, &num_pdev, 0);
@@ -147,15 +150,29 @@ static int create_device(void)
 
 	printf("Found %d physical devices\n", num_pdev);
 	for(i=0; i<num_pdev; i++) {
-		memset(&rayacc_prop, 0, sizeof rayacc_prop);
-		rayacc_prop.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_PROPERTIES_KHR;
+		if(have_raytrace) {
+			memset(&rayacc_prop, 0, sizeof rayacc_prop);
+			rayacc_prop.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_PROPERTIES_KHR;
+
+			memset(&raypipe_prop, 0, sizeof raypipe_prop);
+			raypipe_prop.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PIPELINE_PROPERTIES_KHR;
+			raypipe_prop.pNext = &rayacc_prop;
+		}
 
 		memset(&pdevprop2, 0, sizeof pdevprop2);
 		pdevprop2.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2;
-		pdevprop2.pNext = &rayacc_prop;
+		pdevprop2.pNext = have_raytrace ? &raypipe_prop : 0;
 
 		vkGetPhysicalDeviceProperties2(pdev_list[i], &pdevprop2);
 		printf(" %d: %s\n", i, pdevprop2.properties.deviceName);
+		if(have_raytrace) {
+			printf("  Raytracing properties:\n");
+			printf("    max ray recursion: %u\n", raypipe_prop.maxRayRecursionDepth);
+			printf("    max ray dispatch: %u\n", raypipe_prop.maxRayDispatchInvocationCount);
+			printf("    max leaf geometry: %llu\n", (unsigned long long)rayacc_prop.maxGeometryCount);
+			printf("    max leaf primitves: %llu\n", (unsigned long long)rayacc_prop.maxPrimitiveCount);
+			printf("    max instances: %llu\n", (unsigned long long)rayacc_prop.maxInstanceCount);
+		}
 	}
 
 	return 0;
-- 
1.7.10.4