From 27ed6e7c2bc55739f2b994c66fc4b32dffa508b1 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 26 Jul 2021 05:49:37 -0300
Subject: vk_buffer_cache: Add transform feedback usage to null buffer

Fixes bad API usages on Vulkan.
---
 src/video_core/renderer_vulkan/vk_buffer_cache.cpp | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/video_core/renderer_vulkan/vk_buffer_cache.cpp b/src/video_core/renderer_vulkan/vk_buffer_cache.cpp
index f4b3ee95c..8ac58bc2f 100644
--- a/src/video_core/renderer_vulkan/vk_buffer_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_buffer_cache.cpp
@@ -358,7 +358,7 @@ void BufferCacheRuntime::ReserveNullBuffer() {
     if (null_buffer) {
         return;
     }
-    null_buffer = device.GetLogical().CreateBuffer(VkBufferCreateInfo{
+    VkBufferCreateInfo create_info{
         .sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO,
         .pNext = nullptr,
         .flags = 0,
@@ -367,9 +367,13 @@ void BufferCacheRuntime::ReserveNullBuffer() {
         .sharingMode = VK_SHARING_MODE_EXCLUSIVE,
         .queueFamilyIndexCount = 0,
         .pQueueFamilyIndices = nullptr,
-    });
+    };
+    if (device.IsExtTransformFeedbackSupported()) {
+        create_info.usage |= VK_BUFFER_USAGE_TRANSFORM_FEEDBACK_BUFFER_BIT_EXT;
+    }
+    null_buffer = device.GetLogical().CreateBuffer(create_info);
     if (device.HasDebuggingToolAttached()) {
-        null_buffer.SetObjectNameEXT("Null index buffer");
+        null_buffer.SetObjectNameEXT("Null buffer");
     }
     null_buffer_commit = memory_allocator.Commit(null_buffer, MemoryUsage::DeviceLocal);
 
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