https://github.com/WWBN/AVideo/issues/8713

node_modules/three/examples/js/shaders/LuminosityHighPassShader.js

@@ -0,0 +1,62 @@
+/**
+ * Luminosity
+ * http://en.wikipedia.org/wiki/Luminosity
+ */
+
+THREE.LuminosityHighPassShader = {
+
+	shaderID: 'luminosityHighPass',
+
+	uniforms: {
+
+		'tDiffuse': { value: null },
+		'luminosityThreshold': { value: 1.0 },
+		'smoothWidth': { value: 1.0 },
+		'defaultColor': { value: new THREE.Color( 0x000000 ) },
+		'defaultOpacity': { value: 0.0 }
+
+	},
+
+	vertexShader: [
+
+		'varying vec2 vUv;',
+
+		'void main() {',
+
+		'	vUv = uv;',
+
+		'	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
+
+		'}'
+
+	].join( '\n' ),
+
+	fragmentShader: [
+
+		'uniform sampler2D tDiffuse;',
+		'uniform vec3 defaultColor;',
+		'uniform float defaultOpacity;',
+		'uniform float luminosityThreshold;',
+		'uniform float smoothWidth;',
+
+		'varying vec2 vUv;',
+
+		'void main() {',
+
+		'	vec4 texel = texture2D( tDiffuse, vUv );',
+
+		'	vec3 luma = vec3( 0.299, 0.587, 0.114 );',
+
+		'	float v = dot( texel.xyz, luma );',
+
+		'	vec4 outputColor = vec4( defaultColor.rgb, defaultOpacity );',
+
+		'	float alpha = smoothstep( luminosityThreshold, luminosityThreshold + smoothWidth, v );',
+
+		'	gl_FragColor = mix( outputColor, texel, alpha );',
+
+		'}'
+
+	].join( '\n' )
+
+};