Added Gamma Correction Shader

examples/js/shaders/GammaCorrectionShader.js

@@ -0,0 +1,50 @@
+/**
+ * @author WestLangley / http://github.com/WestLangley
+ *
+ * Gamma Correction Shader
+ * http://en.wikipedia.org/wiki/gamma_correction
+ */
+
+THREE.GammaCorrectionShader = {
+
+	uniforms: {
+
+		"tDiffuse": { type: "t", value: null },
+
+	},
+
+	vertexShader: [
+
+		"varying vec2 vUv;",
+
+		"void main() {",
+
+			"vUv = uv;",
+			"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+		"}"
+
+	].join("\n"),
+
+	fragmentShader: [
+
+		"#define GAMMA_OUTPUT",
+		"#define GAMMA_FACTOR 2",
+
+		"uniform sampler2D tDiffuse;",
+
+		"varying vec2 vUv;",
+
+		THREE.ShaderChunk[ "common" ],
+
+		"void main() {",
+
+			"vec4 tex = texture2D( tDiffuse, vec2( vUv.x, vUv.y ) );",
+
+			"gl_FragColor = vec4( linearToOutput( tex.rgb ), tex.a );",
+
+		"}"
+
+	].join("\n")
+
+};