From 6ce8450b12852d34f8db0adb33e9a772af473945 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Tue, 17 Sep 2019 17:25:09 +0200
Subject: [PATCH] [d3d11] Implement D3D11.2 MapOnDefaultBuffers feature

Basically just allocates the buffer on a host-visible memory
type, like DYNAMIC or STAGING buffers depending depending on
the CPU access flags.
---
 src/d3d11/d3d11_buffer.cpp | 7 ++++++-
 src/d3d11/d3d11_device.cpp | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/d3d11/d3d11_buffer.cpp b/src/d3d11/d3d11_buffer.cpp
index deac75996..f01199731 100644
--- a/src/d3d11/d3d11_buffer.cpp
+++ b/src/d3d11/d3d11_buffer.cpp
@@ -224,10 +224,15 @@ namespace dxvk {
       case D3D11_USAGE_DEFAULT:
         memoryFlags |= VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
 
-        if (m_desc.BindFlags & D3D11_BIND_CONSTANT_BUFFER) {
+        if ((m_desc.BindFlags & D3D11_BIND_CONSTANT_BUFFER) || m_desc.CPUAccessFlags) {
           memoryFlags |= VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
                       |  VK_MEMORY_PROPERTY_HOST_COHERENT_BIT;
         }
+
+        if (m_desc.CPUAccessFlags & D3D11_CPU_ACCESS_READ) {
+          memoryFlags |= VK_MEMORY_PROPERTY_HOST_CACHED_BIT;
+          memoryFlags &= ~VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
+        }
         break;
       
       case D3D11_USAGE_DYNAMIC:
diff --git a/src/d3d11/d3d11_device.cpp b/src/d3d11/d3d11_device.cpp
index cf765c336..5e0d3f049 100644
--- a/src/d3d11/d3d11_device.cpp
+++ b/src/d3d11/d3d11_device.cpp
@@ -1606,7 +1606,7 @@ namespace dxvk {
         info->TiledResourcesTier                    = D3D11_TILED_RESOURCES_NOT_SUPPORTED;
         info->MinMaxFiltering                       = FALSE;
         info->ClearViewAlsoSupportsDepthOnlyFormats = TRUE;
-        info->MapOnDefaultBuffers                   = FALSE;
+        info->MapOnDefaultBuffers                   = TRUE;
       } return S_OK;
 
       case D3D11_FEATURE_D3D9_SIMPLE_INSTANCING_SUPPORT: {