From e1914a9c87523d46f255c226c7d6e2e4027c2446 Mon Sep 17 00:00:00 2001
From: Steven Robertson <steven@strobe.cc>
Date: Fri, 20 Jan 2012 09:23:46 -0500
Subject: [PATCH] Clamp min to 0 in colorclip (for wavelet et al)

---
 cuburn/code/filtering.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cuburn/code/filtering.py b/cuburn/code/filtering.py
index c9f7082..32ab149 100644
--- a/cuburn/code/filtering.py
+++ b/cuburn/code/filtering.py
@@ -25,6 +25,10 @@ void colorclip(float4 *pixbuf, float gamma, float vibrance, float highpow,
         return;
     }
 
+    pix.x = fmaxf(0.0f, pix.x);
+    pix.y = fmaxf(0.0f, pix.y);
+    pix.z = fmaxf(0.0f, pix.z);
+
     float4 opix = pix;
 
     float alpha = powf(pix.w, gamma);