From fc9aa5c1840421f5b7d1e17fb1509d7c9cb10810 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Fri, 30 Aug 2024 19:50:00 +0200
Subject: [PATCH] Fix texture streaming reallocation task to ignore
 not-resident mips

#2559
---
 Source/Engine/Graphics/Textures/StreamingTexture.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Source/Engine/Graphics/Textures/StreamingTexture.cpp b/Source/Engine/Graphics/Textures/StreamingTexture.cpp
index 14874abf1..ecd9bbd55 100644
--- a/Source/Engine/Graphics/Textures/StreamingTexture.cpp
+++ b/Source/Engine/Graphics/Textures/StreamingTexture.cpp
@@ -213,13 +213,13 @@ protected:
         const int32 dstMips = dstTexture->MipLevels();
         GPUTexture* srcTexture = _streamingTexture->GetTexture();
         const int32 srcMips = srcTexture->MipLevels();
+        const int32 srcMissingMips = srcMips - srcTexture->ResidentMipLevels();;
         const int32 mipCount = Math::Min(dstMips, srcMips);
-        ASSERT(mipCount > 0);
-        for (int32 mipIndex = 0; mipIndex < mipCount; mipIndex++)
+        for (int32 mipIndex = srcMissingMips; mipIndex < mipCount; mipIndex++)
         {
             context->GPU->CopySubresource(dstTexture, dstMips - mipIndex - 1, srcTexture, srcMips - mipIndex - 1);
         }
-        _uploadedMipCount = mipCount;
+        _uploadedMipCount = mipCount - srcMissingMips;
 
         return Result::Ok;
     }