three-shaders/shaders/GammaCorrectionShader.js

three-shaders - a library of shaders included with Three.js library

/**
 * @author WestLangley / http://github.com/WestLangley
 *
 * Gamma Correction Shader
 * http://en.wikipedia.org/wiki/gamma_correction
 */

function GammaCorrectionShader() {

	return {

	uniforms: {

		tDiffuse: { value: null }

	},

	vertexShader: `

		varying vec2 vUv;

		void main() {

			vUv = uv;
			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );

		}

	`,

	fragmentShader: `

		uniform sampler2D tDiffuse;

		varying vec2 vUv;

		void main() {

			vec4 tex = texture2D( tDiffuse, vec2( vUv.x, vUv.y ) );

			gl_FragColor = LinearToGamma( tex, float( GAMMA_FACTOR ) );

		}

	`
	}

};

module.exports = GammaCorrectionShader;