From 96f5641a7ea1ac661bfb26f166a3725cb21ce28d Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Wed, 30 Jun 2021 03:01:34 +0200
Subject: [PATCH] [d3d9] Ensure that the bound UP vertex buffer region is large
 enough

If the buffer size is less than (vertexCount * stride), the last vertex
may be considered out-of-bounds, even if all attributes are included in
the vertex.

Fixes #2131.
---
 src/d3d9/d3d9_device.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/d3d9/d3d9_device.h b/src/d3d9/d3d9_device.h
index 0a318a2a0..719721134 100644
--- a/src/d3d9/d3d9_device.h
+++ b/src/d3d9/d3d9_device.h
@@ -1090,7 +1090,7 @@ namespace dxvk {
     }
 
     inline uint32_t GetUPBufferSize(uint32_t vertexCount, uint32_t stride) {
-      return (vertexCount - 1) * stride + m_state.vertexDecl->GetSize();
+      return (vertexCount - 1) * stride + std::max(m_state.vertexDecl->GetSize(), stride);
     }
 
     inline void FillUPVertexBuffer(void* buffer, const void* userData, uint32_t dataSize, uint32_t bufferSize) {