From b5e181c3f87201b95e6b6e6b96de2ac15ed35f35 Mon Sep 17 00:00:00 2001
From: Mike Pavone <pavone@retrodev.com>
Date: Sun, 27 Oct 2013 21:41:21 -0700
Subject: Support interlace mode with OpenGL backend

--HG--
branch : opengl
---
 default.f.glsl | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'default.f.glsl')

diff --git a/default.f.glsl b/default.f.glsl
index 55b6c52..f7bb89a 100644
--- a/default.f.glsl
+++ b/default.f.glsl
@@ -6,5 +6,9 @@ varying vec2 texcoord;
 
 void main()
 {
-	gl_FragColor = texture2D(textures[0], texcoord);
+	gl_FragColor = mix(
+		texture2D(textures[0], texcoord),
+		texture2D(textures[1], vec2(texcoord.x, texcoord.y - 1.0/512.0)),
+		sin((texcoord.y * 512.0 - 0.75) * 3.14159265359) / 2.0 + 0.5
+	);
 }
-- 
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