Added luma key effect

2019-01-23 08:25:18 -03:00
parent 9186eac9ca
commit 5b4d80edad
2 changed files with 31 additions and 0 deletions
@@ -0,0 +1,21 @@
+/* Luma key simple program
+Based on Edward Cannon's Simple Chroma Key (adaptation by Olive Team)
+Feel free to modify and use at will */
+
+uniform sampler2D tex;
+varying vec2 vTexCoord;
+
+uniform float loc;
+uniform float hic;
+
+void main(void) {
+	vec4 texture_color = texture2D(tex,vTexCoord);
+
+	float luma = max(max(texture_color.r,texture_color.g), texture_color.b) + min(min(texture_color.r,texture_color.g), texture_color.b);
+	
+	luma /= 2.0;
+
+	texture_color.a = (luma >= loc && luma <= hic) ? luma : 0.0;
+	
+	gl_FragColor = texture_color; 
+}
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<effect name="Luma Key" category="Keying">
+	<row name="Lower Limit">
+		<field type="double" min="0" default="0" max="1" id="loc"/>
+	</row>
+	<row name="Upper Limit">
+		<field type="double" min="0" default="1" max="1" id="hic"/>
+	</row>
+	<shader vert="common.vert" frag="lumakey.frag"/>
+</effect>