@arcgis/core/layers/raster/functions/GrayscaleFunction.js

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

/* COPYRIGHT Esri - https://js.arcgis.com/5.0.8/LICENSE.txt */
import{__decorate as t}from"tslib";import{property as e,subclass as s}from"../../../core/accessorSupport/decorators.js";import r from"./BaseRasterFunction.js";import{grayscale as o}from"./conversionUtils.js";import n from"./GrayscaleFunctionArguments.js";let i=class extends r{constructor(){super(...arguments),this.functionName="Grayscale",this.functionArguments=null,this.rasterArgumentNames=["raster"]}get _normalizedWeights(){const{conversionParameters:t}=this.functionArguments,e=t.reduce((t,e)=>t+e);return t.map(t=>t/e)}_bindSourceRasters(){const{conversionParameters:t}=this.functionArguments;if(!t?.length)return{success:!1,supportsGPU:!1,error:"missing valid conversion parameters."};const e=this.sourceRasterInfos[0].clone();this.outputPixelType=this._getOutputPixelType(e.pixelType),e.pixelType=this.outputPixelType;const s=3===t.length||3===e.bandCount&&t.length>3;return e.bandCount=1,this._removeStatsHistColormapVAT(e),this.rasterInfo=e,{success:!0,supportsGPU:s}}_processPixels(t){const e=t.pixelBlocks?.[0];return null==e?null:o(e,this._normalizedWeights,this.outputPixelType)}_getWebGLParameters(){return{weights:this._normalizedWeights}}};t([e({json:{write:!0,name:"rasterFunction"}})],i.prototype,"functionName",void 0),t([e({type:n,json:{write:!0,name:"rasterFunctionArguments"}})],i.prototype,"functionArguments",void 0),t([e()],i.prototype,"rasterArgumentNames",void 0),t([e()],i.prototype,"_normalizedWeights",null),i=t([s("esri.layers.raster.functions.GrayscaleFunction")],i);const u=i;export{u as default};