From cff1cd36aa64b0713c068d82380bd6554984fa67 Mon Sep 17 00:00:00 2001
From: Tony Barbour <tony@LunarG.com>
Date: Mon, 16 May 2016 15:47:56 -0600
Subject: demos: Make sure shaderClipDistance is available before requesting

Change-Id: Id0b58d54a553fce4914ddc1097f1e1c8ac3c337f
---
 demos/tri.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/demos/tri.c b/demos/tri.c
index 1c80a22b..789ec2bd 100644
--- a/demos/tri.c
+++ b/demos/tri.c
@@ -199,6 +199,7 @@ struct demo {
     VkDevice device;
     VkQueue queue;
     VkPhysicalDeviceProperties gpu_props;
+    VkPhysicalDeviceFeatures gpu_features;
     VkQueueFamilyProperties *queue_props;
     uint32_t graphics_queue_node_index;
 
@@ -2161,8 +2162,7 @@ static void demo_init_vk(struct demo *demo) {
                                              demo->queue_props);
     assert(demo->queue_count >= 1);
 
-    VkPhysicalDeviceFeatures features;
-    vkGetPhysicalDeviceFeatures(demo->gpu, &features);
+    vkGetPhysicalDeviceFeatures(demo->gpu, &demo->gpu_features);
 
     // Graphics queue and MemMgr queue can be separate.
     // TODO: Add support for separate queues, including synchronization,
@@ -2180,9 +2180,12 @@ static void demo_init_device(struct demo *demo) {
         .queueCount = 1,
         .pQueuePriorities = queue_priorities};
 
-    VkPhysicalDeviceFeatures features = {
-        .shaderClipDistance = VK_TRUE,
-    };
+
+    VkPhysicalDeviceFeatures features;
+    memset(&features, 0, sizeof(features));
+    if (demo->gpu_features.shaderClipDistance) {
+        features.shaderClipDistance = VK_TRUE;
+    }
 
     VkDeviceCreateInfo device = {
         .sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
-- 
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