{"version":3,"file":"LUTPass.cjs","sources":["../../src/postprocessing/LUTPass.js"],"sourcesContent":["import { ShaderPass } from './ShaderPass'\n\nconst LUTShader = {\n  defines: {\n    USE_3DTEXTURE: 1,\n  },\n\n  uniforms: {\n    lut3d: { value: null },\n\n    lut: { value: null },\n    lutSize: { value: 0 },\n\n    tDiffuse: { value: null },\n    intensity: { value: 1.0 },\n  },\n\n  vertexShader: /* glsl */ `\n\n\t\tvarying vec2 vUv;\n\n\t\tvoid main() {\n\n\t\t\tvUv = uv;\n\t\t\tgl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n\n\t\t}\n\n\t`,\n\n  fragmentShader: /* glsl */ `\n\n\t\tuniform float lutSize;\n\t\t#if USE_3DTEXTURE\n\t\tprecision highp sampler3D;\n\t\tuniform sampler3D lut3d;\n\t\t#else\n\t\tuniform sampler2D lut;\n\n\t\tvec3 lutLookup( sampler2D tex, float size, vec3 rgb ) {\n\n\t\t\tfloat sliceHeight = 1.0 / size;\n\t\t\tfloat yPixelHeight = 1.0 / ( size * size );\n\n\t\t\t// Get the slices on either side of the sample\n\t\t\tfloat slice = rgb.b * size;\n\t\t\tfloat interp = fract( slice );\n\t\t\tfloat slice0 = slice - interp;\n\t\t\tfloat centeredInterp = interp - 0.5;\n\n\t\t\tfloat slice1 = slice0 + sign( centeredInterp );\n\n\t\t\t// Pull y sample in by half a pixel in each direction to avoid color\n\t\t\t// bleeding from adjacent slices.\n\t\t\tfloat greenOffset = clamp( rgb.g * sliceHeight, yPixelHeight * 0.5, sliceHeight - yPixelHeight * 0.5 );\n\n\t\t\tvec2 uv0 = vec2(\n\t\t\t\trgb.r,\n\t\t\t\tslice0 * sliceHeight + greenOffset\n\t\t\t);\n\t\t\tvec2 uv1 = vec2(\n\t\t\t\trgb.r,\n\t\t\t\tslice1 * sliceHeight + greenOffset\n\t\t\t);\n\n\t\t\tvec3 sample0 = texture2D( tex, uv0 ).rgb;\n\t\t\tvec3 sample1 = texture2D( tex, uv1 ).rgb;\n\n\t\t\treturn mix( sample0, sample1, abs( centeredInterp ) );\n\n\t\t}\n\t\t#endif\n\n\t\tvarying vec2 vUv;\n\t\tuniform float intensity;\n\t\tuniform sampler2D tDiffuse;\n\t\tvoid main() {\n\n\t\t\tvec4 val = texture2D( tDiffuse, vUv );\n\t\t\tvec4 lutVal;\n\n\t\t\t// pull the sample in by half a pixel so the sample begins\n\t\t\t// at the center of the edge pixels.\n\t\t\tfloat pixelWidth = 1.0 / lutSize;\n\t\t\tfloat halfPixelWidth = 0.5 / lutSize;\n\t\t\tvec3 uvw = vec3( halfPixelWidth ) + val.rgb * ( 1.0 - pixelWidth );\n\n\t\t\t#if USE_3DTEXTURE\n\n\t\t\tlutVal = vec4( texture( lut3d, uvw ).rgb, val.a );\n\n\t\t\t#else\n\n\t\t\tlutVal = vec4( lutLookup( lut, lutSize, uvw ), val.a );\n\n\t\t\t#endif\n\n\t\t\tgl_FragColor = vec4( mix( val, lutVal, intensity ) );\n\n\t\t}\n\n\t`,\n}\n\nclass LUTPass extends ShaderPass {\n  set lut(v) {\n    const material = this.material\n    if (v !== this.lut) {\n      material.uniforms.lut3d.value = null\n      material.uniforms.lut.value = null\n\n      if (v) {\n        const is3dTextureDefine = v.isData3DTexture ? 1 : 0\n        if (is3dTextureDefine !== material.defines.USE_3DTEXTURE) {\n          material.defines.USE_3DTEXTURE = is3dTextureDefine\n          material.needsUpdate = true\n        }\n\n        material.uniforms.lutSize.value = v.image.width\n        if (v.isData3DTexture) {\n          material.uniforms.lut3d.value = v\n        } else {\n          material.uniforms.lut.value = v\n        }\n      }\n    }\n  }\n\n  get lut() {\n    return this.material.uniforms.lut.value || this.material.uniforms.lut3d.value\n  }\n\n  set intensity(v) {\n    this.material.uniforms.intensity.value = v\n  }\n\n  get intensity() {\n    return this.material.uniforms.intensity.value\n  }\n\n  constructor(options = {}) {\n    super(LUTShader)\n    this.lut = options.lut || null\n    this.intensity = 'intensity' in options ? options.intensity : 1\n  }\n}\n\nexport { LUTPass }\n"],"names":["ShaderPass"],"mappings":";;;AAEA,MAAM,YAAY;AAAA,EAChB,SAAS;AAAA,IACP,eAAe;AAAA,EAChB;AAAA,EAED,UAAU;AAAA,IACR,OAAO,EAAE,OAAO,KAAM;AAAA,IAEtB,KAAK,EAAE,OAAO,KAAM;AAAA,IACpB,SAAS,EAAE,OAAO,EAAG;AAAA,IAErB,UAAU,EAAE,OAAO,KAAM;AAAA,IACzB,WAAW,EAAE,OAAO,EAAK;AAAA,EAC1B;AAAA,EAED;AAAA;AAAA,IAAyB;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA,EAazB;AAAA;AAAA,IAA2B;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAAA;AAwE7B;AAEA,MAAM,gBAAgBA,WAAAA,WAAW;AAAA,EAC/B,IAAI,IAAI,GAAG;AACT,UAAM,WAAW,KAAK;AACtB,QAAI,MAAM,KAAK,KAAK;AAClB,eAAS,SAAS,MAAM,QAAQ;AAChC,eAAS,SAAS,IAAI,QAAQ;AAE9B,UAAI,GAAG;AACL,cAAM,oBAAoB,EAAE,kBAAkB,IAAI;AAClD,YAAI,sBAAsB,SAAS,QAAQ,eAAe;AACxD,mBAAS,QAAQ,gBAAgB;AACjC,mBAAS,cAAc;AAAA,QACxB;AAED,iBAAS,SAAS,QAAQ,QAAQ,EAAE,MAAM;AAC1C,YAAI,EAAE,iBAAiB;AACrB,mBAAS,SAAS,MAAM,QAAQ;AAAA,QAC1C,OAAe;AACL,mBAAS,SAAS,IAAI,QAAQ;AAAA,QAC/B;AAAA,MACF;AAAA,IACF;AAAA,EACF;AAAA,EAED,IAAI,MAAM;AACR,WAAO,KAAK,SAAS,SAAS,IAAI,SAAS,KAAK,SAAS,SAAS,MAAM;AAAA,EACzE;AAAA,EAED,IAAI,UAAU,GAAG;AACf,SAAK,SAAS,SAAS,UAAU,QAAQ;AAAA,EAC1C;AAAA,EAED,IAAI,YAAY;AACd,WAAO,KAAK,SAAS,SAAS,UAAU;AAAA,EACzC;AAAA,EAED,YAAY,UAAU,IAAI;AACxB,UAAM,SAAS;AACf,SAAK,MAAM,QAAQ,OAAO;AAC1B,SAAK,YAAY,eAAe,UAAU,QAAQ,YAAY;AAAA,EAC/D;AACH;;"}