From a39b9cb131f453d34f8498090413157565377931 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Tue, 22 May 2018 21:10:39 +0200
Subject: [PATCH] [d3d11] Pre-clear buffers with D3D11_USAGE_DEFAULT

Some games may expect buffers, like images, to be pre-initialized.
---
 src/d3d11/d3d11_device.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/d3d11/d3d11_device.cpp b/src/d3d11/d3d11_device.cpp
index 9eb1ecae8..f58cc02cb 100644
--- a/src/d3d11/d3d11_device.cpp
+++ b/src/d3d11/d3d11_device.cpp
@@ -1851,6 +1851,9 @@ namespace dxvk {
     const D3D11_SUBRESOURCE_DATA*     pInitialData) {
     const DxvkBufferSlice bufferSlice = pBuffer->GetBufferSlice();
     
+    D3D11_BUFFER_DESC desc;
+    pBuffer->GetDesc(&desc);
+    
     if (pInitialData != nullptr && pInitialData->pSysMem != nullptr) {
       LockResourceInitContext();
       
@@ -1860,6 +1863,16 @@ namespace dxvk {
         bufferSlice.length(),
         pInitialData->pSysMem);
       
+      UnlockResourceInitContext(1);
+    } else if (desc.Usage == D3D11_USAGE_DEFAULT) {
+      LockResourceInitContext();
+      
+      m_resourceInitContext->clearBuffer(
+        bufferSlice.buffer(),
+        bufferSlice.offset(),
+        bufferSlice.length(),
+        0u);
+      
       UnlockResourceInitContext(1);
     }
   }