From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sat, 7 Jul 2018 09:08:05 +0000 (+0200)
Subject: Fix the texel centers for motion search. Helps a whole lot.
X-Git-Tag: 1.8.0~76^2~233
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=64f4f922b0b268634578fcc2038a23de47c7995b;p=nageru

Fix the texel centers for motion search. Helps a whole lot.
---

diff --git a/motion_search.frag b/motion_search.frag
index 262dca5..927ecc5 100644
--- a/motion_search.frag
+++ b/motion_search.frag
@@ -49,7 +49,7 @@ void main()
 {
 	// Lock patch_bottom_left_texel to an integer, so that we never get
 	// any bilinear artifacts for the gradient.
-	vec2 base = round(patch_bottom_left_texel * image_size)
+	vec2 base = (round(patch_bottom_left_texel * image_size - vec2(0.5, 0.5)) + vec2(0.5, 0.5))
 		* inv_image_size;
 
 	// First, precompute the pseudo-Hessian for the template patch.