From 24e63456c6cd41b50fd5187ec1570ed0d38facca Mon Sep 17 00:00:00 2001
From: Lectem <lectem@gmail.com>
Date: Wed, 19 Oct 2016 17:47:00 +0200
Subject: [PATCH] Fix compression for non multiple of 4 texture size

If the width or the height was not a multiple of 4, we would read data outside of the bitmap array
---
 src/nvtt/BlockCompressor.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/nvtt/BlockCompressor.cpp b/src/nvtt/BlockCompressor.cpp
index 6b39636..89e15fb 100644
--- a/src/nvtt/BlockCompressor.cpp
+++ b/src/nvtt/BlockCompressor.cpp
@@ -262,8 +262,8 @@ void FloatColorCompressorTask(void * data, int i)
     Vector4 colors[16];
     float weights[16];
 
-    const uint block_w = min(d->w, 4U);
-    const uint block_h = min(d->h, 4U);
+    const uint block_w = min(d->w - block_x * 4U, 4U);
+    const uint block_h = min(d->h - block_y * 4U, 4U);
 
     uint x, y;
     for (y = 0; y < block_h; y++) {