From c22dcdbaa3de0e2da250c800eb48e8c31bfa44b1 Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Thu, 11 Nov 2021 23:52:35 +0000
Subject: [PATCH] [d3d9] Clamp LOD in calls to SetLOD

MSDN says this is clamped and returns the clamped value.

Closes: #1869
---
 src/d3d9/d3d9_texture.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/d3d9/d3d9_texture.h b/src/d3d9/d3d9_texture.h
index cfe6ecc2..c484c015 100644
--- a/src/d3d9/d3d9_texture.h
+++ b/src/d3d9/d3d9_texture.h
@@ -56,11 +56,13 @@ namespace dxvk {
 
     DWORD STDMETHODCALLTYPE SetLOD(DWORD LODNew) final {
       DWORD oldLod = m_lod;
-      m_lod = LODNew;
+      m_lod = std::min<DWORD>(LODNew, m_texture.Desc()->MipLevels - 1);
 
-      m_texture.CreateSampleView(LODNew);
-      if (this->GetPrivateRefCount() > 0)
-        this->m_parent->MarkTextureBindingDirty(this);
+      if (m_lod != oldLod) {
+        m_texture.CreateSampleView(LODNew);
+        if (this->GetPrivateRefCount() > 0)
+          this->m_parent->MarkTextureBindingDirty(this);
+      }
 
       return oldLod;
     }