From b4b1b8f95c9d14e98b9b813c53894ef4f80a8117 Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Tue, 22 Jan 2019 13:26:56 +1100
Subject: [PATCH] added tile effect

---
 effects/tile.frag | 27 +++++++++++++++++++++++++++
 effects/tile.xml  | 13 +++++++++++++
 2 files changed, 40 insertions(+)
 create mode 100644 effects/tile.frag
 create mode 100644 effects/tile.xml

diff --git a/effects/tile.frag b/effects/tile.frag
new file mode 100644
index 000000000..c1f48d767
--- /dev/null
+++ b/effects/tile.frag
@@ -0,0 +1,27 @@
+#version 110
+
+varying vec2 vTexCoord;
+uniform sampler2D tex0; // scene buffer
+
+uniform float tilecount;
+uniform bool mirrorx;
+uniform bool mirrory;
+
+void main(void) {
+	vec2 texCoord = vTexCoord;
+	
+	vec2 coord = vec2(
+		mod(vTexCoord.x*tilecount, 1.0),
+		mod(vTexCoord.y*tilecount, 1.0)
+	);
+	
+	if (mirrorx && mod(vTexCoord.x*tilecount, 2.0) > 1.0) {
+		coord.x = 1.0 - coord.x;
+	}
+	
+	if (mirrory && mod(vTexCoord.y*tilecount, 2.0) > 1.0) {
+		coord.y = 1.0 - coord.y;
+	}
+
+	gl_FragColor = vec4(texture2D(tex0, coord));	
+}
\ No newline at end of file
diff --git a/effects/tile.xml b/effects/tile.xml
new file mode 100644
index 000000000..d73a6e79e
--- /dev/null
+++ b/effects/tile.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<effect name="Tile" category="Distort">
+	<row name="Tile Count">
+		<field type="double" min="1" default="2" id="tilecount"/>
+	</row>
+	<row name="Mirror X">
+		<field type="bool" default="0" id="mirrorx"/>
+	</row>
+	<row name="Mirror Y">
+		<field type="bool" default="0" id="mirrory"/>
+	</row>
+	<shader vert="common.vert" frag="tile.frag"/>
+</effect>
\ No newline at end of file