scandit-sdk

<!doctype html> <html lang="en"> <head> <title>Code coverage report for src/lib/scanSettings.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../../index.html">All files</a> / <a href="index.html">src/lib</a> scanSettings.ts </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 100% Statements 106/106 </div> <div class='fl pad1y space-right2'> 100% Branches 44/44 </div> <div class='fl pad1y space-right2'> 100% Functions 26/26 </div> <div class='fl pad1y space-right2'> 100% Lines 99/99 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. </div> <div class='status-line high'></div> <pre><table 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      14x 1x   1x           14x 2x                 14x 1x   1x           14x 286x                 14x 1x   1x               14x 5x                       14x 70x   70x               14x 3x                         14x 2x   2x           14x 3x                         14x 2x   2x                       14x 3x 2x     1x                         14x 2x   2x     14x 34x 32x 6x   26x     2x       14x       162x 34x 4x     158x 30x 20x   10x         14x 196x 162x   34x     190x   14x  </td><td class="text"><pre class="prettyprint lang-js">import { Barcode } from "./barcode"; import { SearchArea } from "./searchArea"; import { SymbologySettings } from "./symbologySettings";   /** * @hidden */ type SymbologyParameter = Barcode.Symbology | Barcode.Symbology[] | Set<Barcode.Symbology>;   /** * A configuration object for scanning options. * * Modified ScanSettings need to be applied to a scanner via * [[BarcodePicker.applyScanSettings]] or [[Scanner.applyScanSettings]] to take effect. */ export class ScanSettings { private readonly symbologySettings: Map<Barcode.Symbology, SymbologySettings>; private readonly properties: Map<string, number>;   private codeDuplicateFilter: number; private maxNumberOfCodesPerFrame: number; private baseSearchArea: SearchArea; private searchArea: SearchArea; private gpuAcceleration: boolean; private blurryRecognition: boolean;   /** * Create a ScanSettings instance. * * @param enabledSymbologies <div class="tsd-signature-symbol">Default =&nbsp;[]</div> * The single symbology or list/set of symbologies that should be initialized as enabled for recognition. * @param codeDuplicateFilter <div class="tsd-signature-symbol">Default =&nbsp;0</div> * The duplicate filter specifying how often a code can be scanned. * When the filter is set to -1, each unique code is only scanned once. When set to 0, * duplicate filtering is disabled. Otherwise the duplicate filter specifies an interval in milliseconds. * When the same code (data/symbology) is scanned within the specified interval it is filtered out as a duplicate. * @param maxNumberOfCodesPerFrame <div class="tsd-signature-symbol">Default =&nbsp;1</div> * The maximum number of barcodes to be recognized every frame. * @param searchArea <div class="tsd-signature-symbol">Default =&nbsp;{ x: 0, y: 0, width: 1.0, height: 1.0 }</div> * The area of the image in which barcodes are searched. * @param gpuAcceleration <div class="tsd-signature-symbol">Default =&nbsp;true</div> * Whether to enable/disable GPU support via WebGL, to provide faster and more accurate barcode localization. * The GPU can and will be used only if the browser also supports the needed technologies * ([WebGL](https://caniuse.com/#feat=webgl) and [OffscreenCanvas](https://caniuse.com/#feat=offscreencanvas)). * @param blurryRecognition <div class="tsd-signature-symbol">Default =&nbsp;true</div> * Whether to enable/disable blurry recognition, to allow accurate scanning capabilities for out-of-focus (1D) codes. * If enabled, more advanced algorithms are executed (and more resources/time is spent) every frame in order * to successfully decode/scan difficult codes. */ constructor({ enabledSymbologies = [], codeDuplicateFilter = 0, maxNumberOfCodesPerFrame = 1, searchArea = { x: 0, y: 0, width: 1.0, height: 1.0 }, gpuAcceleration = true, blurryRecognition = true }: { enabledSymbologies?: SymbologyParameter; codeDuplicateFilter?: number; maxNumberOfCodesPerFrame?: number; searchArea?: SearchArea; gpuAcceleration?: boolean; blurryRecognition?: boolean; } = {}) { this.symbologySettings = new Map<Barcode.Symbology, SymbologySettings>(); this.enableSymbologies(enabledSymbologies); this.codeDuplicateFilter = codeDuplicateFilter; this.maxNumberOfCodesPerFrame = maxNumberOfCodesPerFrame; this.baseSearchArea = { x: 0, y: 0, width: 1.0, height: 1.0 }; this.searchArea = searchArea; this.gpuAcceleration = gpuAcceleration; this.blurryRecognition = blurryRecognition; this.properties = new Map<string, number>(); }   /** * @returns The configuration object as a JSON string. */ public toJSONString(): string { const symbologies: { [jsonSymbologyName: string]: SymbologySettings } = {}; this.symbologySettings.forEach((symbologySettings, symbology) => { symbologies[Barcode.Symbology.toJSONName(symbology)] = symbologySettings; }); const properties: { [key: string]: number } = {}; this.properties.forEach((value, key) => { properties[key] = value; });   const combinedSearchArea: SearchArea = { x: Math.min(1, this.baseSearchArea.x + this.searchArea.x * this.baseSearchArea.width), y: Math.min(1, this.baseSearchArea.y + this.searchArea.y * this.baseSearchArea.height), width: Math.min(1, this.baseSearchArea.width * this.searchArea.width), height: Math.min(1, this.baseSearchArea.height * this.searchArea.height) };   const isFullSearchArea: boolean = Math.round(combinedSearchArea.x * 100) === 0 && Math.round(combinedSearchArea.y * 100) === 0 && Math.round(combinedSearchArea.width * 100) === 100 && Math.round(combinedSearchArea.height * 100) === 100;   return JSON.stringify({ symbologies, codeDuplicateFilter: this.codeDuplicateFilter, maxNumberOfCodesPerFrame: this.maxNumberOfCodesPerFrame, searchArea: combinedSearchArea, codeLocation1d: isFullSearchArea ? undefined : { area: { x: combinedSearchArea.x, y: combinedSearchArea.y + (combinedSearchArea.height * 0.75) / 2, width: combinedSearchArea.width, height: combinedSearchArea.height * 0.25 } }, codeLocation2d: isFullSearchArea ? undefined : { area: combinedSearchArea }, gpuAcceleration: this.gpuAcceleration, blurryRecognition: this.blurryRecognition, properties }); }   /** * Get the configuration object for a symbology (which can then be modified). * * @param symbology The symbology for which to retrieve the configuration. * @returns The symbology configuration object for the specified symbology. */ public getSymbologySettings(symbology: Barcode.Symbology): SymbologySettings { if (this.symbologySettings.has(symbology)) { return <SymbologySettings>this.symbologySettings.get(symbology); } else { if (symbology in Barcode.Symbology || Object.values(Barcode.Symbology).includes(symbology)) { this.symbologySettings.set(symbology, new SymbologySettings());   return <SymbologySettings>this.symbologySettings.get(symbology); } else { throw new TypeError(`Invalid symbology "${symbology}"`); } } }   /** * Get the recognition enabled status for a symbology. * * @param symbology The symbology for which to retrieve the recognition enabled status. * @returns Whether the symbology enabled for recognition. */ public isSymbologyEnabled(symbology: Barcode.Symbology): boolean { return this.getSymbologySettings(symbology).isEnabled(); }   /** * Enable recognition of a symbology or list/set of symbologies. * * @param symbology The single symbology or list/set of symbologies to enable. * @returns The updated [[ScanSettings]] object. */ public enableSymbologies(symbology: SymbologyParameter): ScanSettings { return this.setSymbologiesEnabled(symbology, true); }   /** * Disable recognition of a symbology or list/set of symbologies. * * @param symbology The single symbology or list/set of symbologies to disable. * @returns The updated [[ScanSettings]] object. */ public disableSymbologies(symbology: SymbologyParameter): ScanSettings { return this.setSymbologiesEnabled(symbology, false); }   /** * When the filter is set to -1, each unique code is only scanned once. When set to 0, * duplicate filtering is disabled. Otherwise the duplicate filter specifies an interval in milliseconds. * * @returns The code duplicate filter value. */ public getCodeDuplicateFilter(): number { return this.codeDuplicateFilter; }   /** * Set the code duplicate filter value. * * When the filter is set to -1, each unique code is only scanned once. When set to 0, * duplicate filtering is disabled. Otherwise the duplicate filter specifies an interval in milliseconds. * * @param durationMilliseconds The new value (-1, 0, or positive integer). * @returns The updated [[ScanSettings]] object. */ public setCodeDuplicateFilter(durationMilliseconds: number): ScanSettings { this.codeDuplicateFilter = durationMilliseconds;   return this; }   /** * @returns The maximum number of barcodes to be recognized every frame. */ public getMaxNumberOfCodesPerFrame(): number { return this.maxNumberOfCodesPerFrame; }   /** * Set the maximum number of barcodes to be recognized every frame. * * @param limit The new value (non-zero positive integer). * @returns The updated [[ScanSettings]] object. */ public setMaxNumberOfCodesPerFrame(limit: number): ScanSettings { this.maxNumberOfCodesPerFrame = limit;   return this; }   /** * @returns The area of the image in which barcodes are searched. */ public getSearchArea(): SearchArea { return this.searchArea; }   /** * Set the area of the image in which barcodes are searched. * * @param searchArea The new search area. * @returns The updated [[ScanSettings]] object. */ public setSearchArea(searchArea: SearchArea): ScanSettings { this.searchArea = searchArea;   return this; }   /** * @hidden * * @returns The base area of the image in which barcodes are searched. */ public getBaseSearchArea(): SearchArea { return this.baseSearchArea; }   /** * @hidden * * Set the base area of the image in which barcodes are searched, this is set automatically by a [[BarcodePicker]] * and is combined with the searchArea to obtain the final combined search area. * * @param baseSearchArea The new base search area. * @returns The updated [[ScanSettings]] object. */ public setBaseSearchArea(baseSearchArea: SearchArea): ScanSettings { this.baseSearchArea = baseSearchArea;   return this; }   /** * @returns Whether GPU acceleration is configured to be enabled ot not. * * Note that this refers to the settings: depending on browser capabilities the actual GPU usage might be prevented. */ public isGpuAccelerationEnabled(): boolean { return this.gpuAcceleration; }   /** * Enable or disable GPU acceleration. * * Provide faster and more accurate barcode localization. * The GPU can and will be used only if the browser also supports the needed technologies * ([WebGL](https://caniuse.com/#feat=webgl) and [OffscreenCanvas](https://caniuse.com/#feat=offscreencanvas)). * * @param enabled Whether to enable or disable GPU acceleration. * @returns The updated [[ScanSettings]] object. */ public setGpuAccelerationEnabled(enabled: boolean): ScanSettings { this.gpuAcceleration = enabled;   return this; }   /** * @returns Whether blurry recognition is configured to be enabled ot not. */ public isBlurryRecognitionEnabled(): boolean { return this.blurryRecognition; }   /** * Enable or disable blurry recognition. * * Allow accurate scanning capabilities for out-of-focus (1D) codes. * If enabled, more advanced algorithms are executed (and more resources/time is spent) every frame in order * to successfully decode/scan difficult codes. * * @param enabled Whether to enable or disable blurry recognition. * @returns The updated [[ScanSettings]] object. */ public setBlurryRecognitionEnabled(enabled: boolean): ScanSettings { this.blurryRecognition = enabled;   return this; }   /** * Get a Scandit Engine library property. * * This function is for internal use only and any functionality that can be accessed through it can and will vanish * without public notice from one version to the next. Do not call this function unless you specifically have to. * * @param key The property name. * @returns The property value. For properties not previously set, -1 is returned. */ public getProperty(key: string): number { if (this.properties.has(key)) { return <number>this.properties.get(key); }   return -1; }   /** * Set a Scandit Engine library property. *