From 906f9fae17f5ddeb10037cc5e9a406f643339878 Mon Sep 17 00:00:00 2001
From: Jonas Kulla <Nyocurio@gmail.com>
Date: Tue, 22 Oct 2013 06:40:24 +0200
Subject: [PATCH] BitmapBlitShader: Try a bit harder

It's not really perfect yet, but it looks a lot closer
to what was there before.
---
 shader/bitmapBlit.frag | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/shader/bitmapBlit.frag b/shader/bitmapBlit.frag
index 2e75e65..1510e7e 100644
--- a/shader/bitmapBlit.frag
+++ b/shader/bitmapBlit.frag
@@ -27,8 +27,7 @@ void main()
 	float at = ab*as;
 	resFrag.a = at + ad - ad*at;
 
-	resFrag.rgb = mix(dstFrag.rgb, srcFrag.rgb, ab*as);
-	resFrag.rgb = mix(srcFrag.rgb, resFrag.rgb, ad*resFrag.a);
+	resFrag.rgb = as*srcFrag.rgb + (1-at) * ad * dstFrag.rgb;
 
 	gl_FragColor = resFrag;
 }