From bdc3b44e7d4100f9ea0cd1e5e1cb6d4e3e71f3cf Mon Sep 17 00:00:00 2001
From: Gary Sweet <gary.sweet@broadcom.com>
Date: Fri, 7 Feb 2020 09:15:13 +0000
Subject: [PATCH] Clamp miplevel size to avoid zero width or height

I was seeing a zero height in certain circumstances
for textures in scenerendering.
---
 base/VulkanTexture.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/base/VulkanTexture.hpp b/base/VulkanTexture.hpp
index c23c1fd2..69bd5df2 100644
--- a/base/VulkanTexture.hpp
+++ b/base/VulkanTexture.hpp
@@ -182,8 +182,8 @@ namespace vks
 					bufferCopyRegion.imageSubresource.mipLevel = i;
 					bufferCopyRegion.imageSubresource.baseArrayLayer = 0;
 					bufferCopyRegion.imageSubresource.layerCount = 1;
-					bufferCopyRegion.imageExtent.width = ktxTexture->baseWidth >> i;
-					bufferCopyRegion.imageExtent.height = ktxTexture->baseHeight >> i;
+					bufferCopyRegion.imageExtent.width = std::max(1u, ktxTexture->baseWidth >> i);
+					bufferCopyRegion.imageExtent.height = std::max(1u, ktxTexture->baseHeight >> i);
 					bufferCopyRegion.imageExtent.depth = 1;
 					bufferCopyRegion.bufferOffset = offset;