/usr/share/javascript/three/examples/js/postprocessing/UnrealBloomPass.js is in libjs-three 80+dfsg2-1.
This file is owned by root:root, with mode 0o644.
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* @author spidersharma / http://eduperiment.com/
Inspired from Unreal Engine::
https://docs.unrealengine.com/latest/INT/Engine/Rendering/PostProcessEffects/Bloom/
*/
THREE.UnrealBloomPass = function ( resolution, strength, radius, threshold ) {
THREE.Pass.call( this );
this.strength = ( strength !== undefined ) ? strength : 1;
this.radius = radius;
this.threshold = threshold;
this.resolution = ( resolution !== undefined ) ? new THREE.Vector2(resolution.x, resolution.y) : new THREE.Vector2(256, 256);
// render targets
var pars = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBAFormat };
this.renderTargetsHorizontal = [];
this.renderTargetsVertical = [];
this.nMips = 5;
var resx = Math.round(this.resolution.x/2);
var resy = Math.round(this.resolution.y/2);
this.renderTargetBright = new THREE.WebGLRenderTarget( resx, resy, pars );
this.renderTargetBright.texture.generateMipmaps = false;
for( var i=0; i<this.nMips; i++) {
var renderTarget = new THREE.WebGLRenderTarget( resx, resy, pars );
renderTarget.texture.generateMipmaps = false;
this.renderTargetsHorizontal.push(renderTarget);
var renderTarget = new THREE.WebGLRenderTarget( resx, resy, pars );
renderTarget.texture.generateMipmaps = false;
this.renderTargetsVertical.push(renderTarget);
resx = Math.round(resx/2);
resy = Math.round(resy/2);
}
// luminosity high pass material
if ( THREE.LuminosityHighPassShader === undefined )
console.error( "THREE.UnrealBloomPass relies on THREE.LuminosityHighPassShader" );
var highPassShader = THREE.LuminosityHighPassShader;
this.highPassUniforms = THREE.UniformsUtils.clone( highPassShader.uniforms );
this.highPassUniforms[ "luminosityThreshold" ].value = threshold;
this.highPassUniforms[ "smoothWidth" ].value = 0.01;
this.materialHighPassFilter = new THREE.ShaderMaterial( {
uniforms: this.highPassUniforms,
vertexShader: highPassShader.vertexShader,
fragmentShader: highPassShader.fragmentShader,
defines: {}
} );
// Gaussian Blur Materials
this.separableBlurMaterials = [];
var kernelSizeArray = [3, 5, 7, 9, 11];
var resx = Math.round(this.resolution.x/2);
var resy = Math.round(this.resolution.y/2);
for( var i=0; i<this.nMips; i++) {
this.separableBlurMaterials.push(this.getSeperableBlurMaterial(kernelSizeArray[i]));
this.separableBlurMaterials[i].uniforms[ "texSize" ].value = new THREE.Vector2(resx, resy);
resx = Math.round(resx/2);
resy = Math.round(resy/2);
}
// Composite material
this.compositeMaterial = this.getCompositeMaterial(this.nMips);
this.compositeMaterial.uniforms["blurTexture1"].value = this.renderTargetsVertical[0].texture;
this.compositeMaterial.uniforms["blurTexture2"].value = this.renderTargetsVertical[1].texture;
this.compositeMaterial.uniforms["blurTexture3"].value = this.renderTargetsVertical[2].texture;
this.compositeMaterial.uniforms["blurTexture4"].value = this.renderTargetsVertical[3].texture;
this.compositeMaterial.uniforms["blurTexture5"].value = this.renderTargetsVertical[4].texture;
this.compositeMaterial.uniforms["bloomStrength"].value = strength;
this.compositeMaterial.uniforms["bloomRadius"].value = 0.1;
this.compositeMaterial.needsUpdate = true;
var bloomFactors = [1.0, 0.8, 0.6, 0.4, 0.2];
this.compositeMaterial.uniforms["bloomFactors"].value = bloomFactors;
this.bloomTintColors = [new THREE.Vector3(1,1,1), new THREE.Vector3(1,1,1), new THREE.Vector3(1,1,1)
,new THREE.Vector3(1,1,1), new THREE.Vector3(1,1,1)];
this.compositeMaterial.uniforms["bloomTintColors"].value = this.bloomTintColors;
// copy material
if ( THREE.CopyShader === undefined )
console.error( "THREE.BloomPass relies on THREE.CopyShader" );
var copyShader = THREE.CopyShader;
this.copyUniforms = THREE.UniformsUtils.clone( copyShader.uniforms );
this.copyUniforms[ "opacity" ].value = 1.0;
this.materialCopy = new THREE.ShaderMaterial( {
uniforms: this.copyUniforms,
vertexShader: copyShader.vertexShader,
fragmentShader: copyShader.fragmentShader,
blending: THREE.AdditiveBlending,
depthTest: false,
depthWrite: false,
transparent: true
} );
this.enabled = true;
this.needsSwap = false;
this.oldClearColor = new THREE.Color();
this.oldClearAlpha = 1;
this.camera = new THREE.OrthographicCamera( - 1, 1, 1, - 1, 0, 1 );
this.scene = new THREE.Scene();
this.quad = new THREE.Mesh( new THREE.PlaneBufferGeometry( 2, 2 ), null );
this.scene.add( this.quad );
};
THREE.UnrealBloomPass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {
constructor: THREE.UnrealBloomPass,
dispose: function() {
for( var i=0; i< this.renderTargetsHorizontal.length(); i++) {
this.renderTargetsHorizontal[i].dispose();
}
for( var i=0; i< this.renderTargetsVertical.length(); i++) {
this.renderTargetsVertical[i].dispose();
}
this.renderTargetBright.dispose();
},
setSize: function ( width, height ) {
var resx = Math.round(width/2);
var resy = Math.round(height/2);
this.renderTargetBright.setSize(resx, resy);
for( var i=0; i<this.nMips; i++) {
this.renderTargetsHorizontal[i].setSize(resx, resy);
this.renderTargetsVertical[i].setSize(resx, resy);
this.separableBlurMaterials[i].uniforms[ "texSize" ].value = new THREE.Vector2(resx, resy);
resx = Math.round(resx/2);
resy = Math.round(resy/2);
}
},
render: function ( renderer, writeBuffer, readBuffer, delta, maskActive ) {
this.oldClearColor.copy( renderer.getClearColor() );
this.oldClearAlpha = renderer.getClearAlpha();
var oldAutoClear = renderer.autoClear;
renderer.autoClear = false;
renderer.setClearColor( new THREE.Color( 0, 0, 0 ), 0 );
if ( maskActive ) renderer.context.disable( renderer.context.STENCIL_TEST );
// 1. Extract Bright Areas
this.highPassUniforms[ "tDiffuse" ].value = readBuffer.texture;
this.highPassUniforms[ "luminosityThreshold" ].value = this.threshold;
this.quad.material = this.materialHighPassFilter;
renderer.render( this.scene, this.camera, this.renderTargetBright, true );
// 2. Blur All the mips progressively
var inputRenderTarget = this.renderTargetBright;
for(var i=0; i<this.nMips; i++) {
this.quad.material = this.separableBlurMaterials[i];
this.separableBlurMaterials[i].uniforms[ "colorTexture" ].value = inputRenderTarget.texture;
this.separableBlurMaterials[i].uniforms[ "direction" ].value = THREE.UnrealBloomPass.BlurDirectionX;
renderer.render( this.scene, this.camera, this.renderTargetsHorizontal[i], true );
this.separableBlurMaterials[i].uniforms[ "colorTexture" ].value = this.renderTargetsHorizontal[i].texture;
this.separableBlurMaterials[i].uniforms[ "direction" ].value = THREE.UnrealBloomPass.BlurDirectionY;
renderer.render( this.scene, this.camera, this.renderTargetsVertical[i], true );
inputRenderTarget = this.renderTargetsVertical[i];
}
// Composite All the mips
this.quad.material = this.compositeMaterial;
this.compositeMaterial.uniforms["bloomStrength"].value = this.strength;
this.compositeMaterial.uniforms["bloomRadius"].value = this.radius;
this.compositeMaterial.uniforms["bloomTintColors"].value = this.bloomTintColors;
renderer.render( this.scene, this.camera, this.renderTargetsHorizontal[0], true );
// Blend it additively over the input texture
this.quad.material = this.materialCopy;
this.copyUniforms[ "tDiffuse" ].value = this.renderTargetsHorizontal[0].texture;
if ( maskActive ) renderer.context.enable( renderer.context.STENCIL_TEST );
renderer.render( this.scene, this.camera, readBuffer, false );
renderer.setClearColor( this.oldClearColor, this.oldClearAlpha );
renderer.autoClear = oldAutoClear;
},
getSeperableBlurMaterial: function(kernelRadius) {
return new THREE.ShaderMaterial( {
defines: {
"KERNEL_RADIUS" : kernelRadius,
"SIGMA" : kernelRadius
},
uniforms: {
"colorTexture": { value: null },
"texSize": { value: new THREE.Vector2( 0.5, 0.5 ) },
"direction": { value: new THREE.Vector2( 0.5, 0.5 ) },
},
vertexShader:
"varying vec2 vUv;\n\
void main() {\n\
vUv = uv;\n\
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\
}",
fragmentShader:
"#include <common>\
varying vec2 vUv;\n\
uniform sampler2D colorTexture;\n\
uniform vec2 texSize;\
uniform vec2 direction;\
\
float gaussianPdf(in float x, in float sigma) {\
return 0.39894 * exp( -0.5 * x * x/( sigma * sigma))/sigma;\
}\
void main() {\n\
vec2 invSize = 1.0 / texSize;\
float fSigma = float(SIGMA);\
float weightSum = gaussianPdf(0.0, fSigma);\
vec3 diffuseSum = texture2D( colorTexture, vUv).rgb * weightSum;\
for( int i = 1; i < KERNEL_RADIUS; i ++ ) {\
float x = float(i);\
float w = gaussianPdf(x, fSigma);\
vec2 uvOffset = direction * invSize * x;\
vec3 sample1 = texture2D( colorTexture, vUv + uvOffset).rgb;\
vec3 sample2 = texture2D( colorTexture, vUv - uvOffset).rgb;\
diffuseSum += (sample1 + sample2) * w;\
weightSum += 2.0 * w;\
}\
gl_FragColor = vec4(diffuseSum/weightSum, 1.0);\n\
}"
} );
},
getCompositeMaterial: function(nMips) {
return new THREE.ShaderMaterial( {
defines:{
"NUM_MIPS" : nMips
},
uniforms: {
"blurTexture1": { value: null },
"blurTexture2": { value: null },
"blurTexture3": { value: null },
"blurTexture4": { value: null },
"blurTexture5": { value: null },
"dirtTexture": { value: null },
"bloomStrength" : { value: 1.0 },
"bloomFactors" : { value: null },
"bloomTintColors" : { value: null },
"bloomRadius" : { value: 0.0 }
},
vertexShader:
"varying vec2 vUv;\n\
void main() {\n\
vUv = uv;\n\
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\
}",
fragmentShader:
"varying vec2 vUv;\
uniform sampler2D blurTexture1;\
uniform sampler2D blurTexture2;\
uniform sampler2D blurTexture3;\
uniform sampler2D blurTexture4;\
uniform sampler2D blurTexture5;\
uniform sampler2D dirtTexture;\
uniform float bloomStrength;\
uniform float bloomRadius;\
uniform float bloomFactors[NUM_MIPS];\
uniform vec3 bloomTintColors[NUM_MIPS];\
\
float lerpBloomFactor(const in float factor) { \
float mirrorFactor = 1.2 - factor;\
return mix(factor, mirrorFactor, bloomRadius);\
}\
\
void main() {\
gl_FragColor = bloomStrength * ( lerpBloomFactor(bloomFactors[0]) * vec4(bloomTintColors[0], 1.0) * texture2D(blurTexture1, vUv) + \
lerpBloomFactor(bloomFactors[1]) * vec4(bloomTintColors[1], 1.0) * texture2D(blurTexture2, vUv) + \
lerpBloomFactor(bloomFactors[2]) * vec4(bloomTintColors[2], 1.0) * texture2D(blurTexture3, vUv) + \
lerpBloomFactor(bloomFactors[3]) * vec4(bloomTintColors[3], 1.0) * texture2D(blurTexture4, vUv) + \
lerpBloomFactor(bloomFactors[4]) * vec4(bloomTintColors[4], 1.0) * texture2D(blurTexture5, vUv) );\
}"
} );
}
} );
THREE.UnrealBloomPass.BlurDirectionX = new THREE.Vector2( 1.0, 0.0 );
THREE.UnrealBloomPass.BlurDirectionY = new THREE.Vector2( 0.0, 1.0 );
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