three-stdlib/shaders/BrightnessContrastShader.js

stand-alone library of threejs examples

const BrightnessContrastShader = {
  uniforms: {
    tDiffuse: { value: null },
    brightness: { value: 0 },
    contrast: { value: 0 }
  },
  vertexShader: [
    "varying vec2 vUv;",
    "void main() {",
    "	vUv = uv;",
    "	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
    "}"
  ].join("\n"),
  fragmentShader: [
    "uniform sampler2D tDiffuse;",
    "uniform float brightness;",
    "uniform float contrast;",
    "varying vec2 vUv;",
    "void main() {",
    "	gl_FragColor = texture2D( tDiffuse, vUv );",
    "	gl_FragColor.rgb += brightness;",
    "	if (contrast > 0.0) {",
    "		gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) / (1.0 - contrast) + 0.5;",
    "	} else {",
    "		gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) * (1.0 + contrast) + 0.5;",
    "	}",
    "}"
  ].join("\n")
};
export {
  BrightnessContrastShader
};
//# sourceMappingURL=BrightnessContrastShader.js.map