From 2a7470723ed0ba366af35be539fb794e41d43e7f Mon Sep 17 00:00:00 2001
From: Jeff <alpyne.dreams@gmail.com>
Date: Sun, 7 Jul 2024 11:47:18 +0100
Subject: [PATCH] [d3d8] Tidy up D3DDEVINFO_VCACHE handling

---
 src/d3d8/d3d8_device.cpp | 10 ++++++++--
 src/d3d8/d3d8_include.h  |  7 -------
 2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/src/d3d8/d3d8_device.cpp b/src/d3d8/d3d8_device.cpp
index 765cdfa24b4..bb4f12b4897 100644
--- a/src/d3d8/d3d8_device.cpp
+++ b/src/d3d8/d3d8_device.cpp
@@ -94,12 +94,18 @@ namespace dxvk {
         // on modern native AMD drivers and D3D8-era native ATI drivers.
         res = GetD3D9()->CreateQuery(d3d9::D3DQUERYTYPE_VCACHE, &pQuery);
 
+        struct D3DDEVINFO_VCACHE {
+          DWORD         Pattern;
+          DWORD         OptMethod;
+          DWORD         CacheSize;
+          DWORD         MagicNumber;
+        };
+
         if(FAILED(res)) {
           if (DevInfoStructSize != sizeof(D3DDEVINFO_VCACHE))
             return D3DERR_INVALIDCALL;
 
-          D3DDEVINFO_VCACHE vCacheDevInfo = {0};
-          memcpy(pDevInfoStruct, &vCacheDevInfo, DevInfoStructSize);
+          memset(pDevInfoStruct, 0, std::min(size_t(DevInfoStructSize), sizeof(D3DDEVINFO_VCACHE)));
           return S_FALSE;
         }
 
diff --git a/src/d3d8/d3d8_include.h b/src/d3d8/d3d8_include.h
index ab5e1d77c87..78d7dcd16d2 100644
--- a/src/d3d8/d3d8_include.h
+++ b/src/d3d8/d3d8_include.h
@@ -179,13 +179,6 @@ namespace d3d9 {
 #define D3DDEVINFOID_VCACHE            4
 #endif
 
-typedef struct D3DDEVINFO_VCACHE {
-  DWORD         Pattern;
-  DWORD         OptMethod;
-  DWORD         CacheSize;
-  DWORD         MagicNumber;
-} D3DDEVINFO_VCACHE;
-
 // MinGW headers are broken. Who'dve guessed?
 #ifndef _MSC_VER