From 85215b10d6fa76491c7a496b067d4b55dfaf0d73 Mon Sep 17 00:00:00 2001
From: Robin Kertels <robin.kertels@gmail.com>
Date: Wed, 6 Mar 2024 18:11:29 +0100
Subject: [PATCH] [d3d9] Respect vertex buffer offset when dynamically
 uploading geometry

---
 src/d3d9/d3d9_device.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/d3d9/d3d9_device.cpp b/src/d3d9/d3d9_device.cpp
index 7e44661b..cc424259 100644
--- a/src/d3d9/d3d9_device.cpp
+++ b/src/d3d9/d3d9_device.cpp
@@ -5246,7 +5246,7 @@ namespace dxvk {
         auto* vbo = GetCommonBuffer(m_state.vertexBuffers[i].vertexBuffer);
 
         const uint32_t vertexStride = m_state.vertexDecl->GetSize(i);
-        uint32_t offset = (BaseVertexIndex + FirstVertexIndex) * vertexStride;
+        uint32_t offset = (BaseVertexIndex + FirstVertexIndex) * vertexStride + m_state.vertexBuffers[i].offset;
 
         uint8_t* data = reinterpret_cast<uint8_t*>(upSlice.mapPtr) + vboUPBufferOffsets[i];
         uint8_t* src = reinterpret_cast<uint8_t*>(vbo->GetMappedSlice().mapPtr) + offset;