From 568f34d83809401182889866e3e2ff0db167aa1d Mon Sep 17 00:00:00 2001
From: castano <castano@95f4ed2b-212e-0410-8b90-d31948207fce>
Date: Mon, 21 Sep 2009 18:46:48 +0000
Subject: [PATCH] Fix color weighted compression for single color blocks. Fixes
 issue 96.

---
 src/nvtt/cuda/CompressKernel.cu | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/nvtt/cuda/CompressKernel.cu b/src/nvtt/cuda/CompressKernel.cu
index 5d748cb..e829a7c 100644
--- a/src/nvtt/cuda/CompressKernel.cu
+++ b/src/nvtt/cuda/CompressKernel.cu
@@ -470,6 +470,9 @@ __device__ void loadColorBlock(const uint * image, float3 colors[16], float3 sum
 
 		*sameColor = (axis == make_float3(0, 0, 0));
 
+		// Single color compressor needs unweighted colors.
+		if (*sameColor) colors[idx] = rawColors[idx];
+
 		dps[idx] = dot(rawColors[idx], axis);
 		
 		__debugsync();