From 9522ef742de9afa939b75baeb418d6e7aedc123d Mon Sep 17 00:00:00 2001
From: Winter Snowfall <WinterSnowfall@users.noreply.github.com>
Date: Fri, 8 Mar 2024 00:52:48 +0200
Subject: [PATCH] [d3d8] Validate depth stencil format use with CopyRects

---
 src/d3d8/d3d8_device.cpp |  7 +++++++
 src/d3d8/d3d8_format.h   | 10 ++++++++++
 2 files changed, 17 insertions(+)

diff --git a/src/d3d8/d3d8_device.cpp b/src/d3d8/d3d8_device.cpp
index c3ad1396558..7d259b6b784 100644
--- a/src/d3d8/d3d8_device.cpp
+++ b/src/d3d8/d3d8_device.cpp
@@ -573,6 +573,13 @@ namespace dxvk {
     src->GetD3D9()->GetDesc(&srcDesc);
     dst->GetD3D9()->GetDesc(&dstDesc);
 
+    // This method cannot be applied to surfaces whose formats
+    // are classified as depth stencil formats.
+    if (unlikely(isDepthStencilFormat(D3DFORMAT(srcDesc.Format)) ||
+                 isDepthStencilFormat(D3DFORMAT(dstDesc.Format)))) {
+      return D3DERR_INVALIDCALL;
+    }
+
     StateChange();
 
     // If pSourceRectsArray is NULL, then the entire surface is copied
diff --git a/src/d3d8/d3d8_format.h b/src/d3d8/d3d8_format.h
index 6bc2c8b487a..5d17e2713b5 100644
--- a/src/d3d8/d3d8_format.h
+++ b/src/d3d8/d3d8_format.h
@@ -26,6 +26,16 @@ namespace dxvk {
         || fmt == D3DFMT_D24X8;
   }
 
+  inline constexpr bool isDepthStencilFormat(D3DFORMAT fmt) {
+    return fmt == D3DFMT_D16_LOCKABLE
+        || fmt == D3DFMT_D16
+        || fmt == D3DFMT_D32
+        || fmt == D3DFMT_D15S1
+        || fmt == D3DFMT_D24X4S4
+        || fmt == D3DFMT_D24S8
+        || fmt == D3DFMT_D24X8;
+  }
+
   // Get bytes per pixel (or 4x4 block for DXT)
   inline constexpr UINT getFormatStride(D3DFORMAT fmt) {
     switch (fmt) {