fabric/dist/src/filters/Gamma.mjs.map

Object model for HTML5 canvas, and SVG-to-canvas parser. Backed by jsdom and node-canvas.

{"version":3,"file":"Gamma.mjs","sources":["../../../src/filters/Gamma.ts"],"sourcesContent":["import { BaseFilter } from './BaseFilter';\nimport { classRegistry } from '../ClassRegistry';\nimport { fragmentSource } from './shaders/gamma';\nimport type { T2DPipelineState, TWebGLUniformLocationMap } from './typedefs';\n\nconst GAMMA = 'Gamma' as const;\n\nexport type GammaInput = [number, number, number];\n\nexport type GammaOwnProps = {\n  gamma: GammaInput;\n};\n\nexport const gammaDefaultValues: GammaOwnProps = {\n  gamma: [1, 1, 1],\n};\n\n/**\n * Gamma filter class\n * @example\n * const filter = new Gamma({\n *   gamma: [1, 0.5, 2.1]\n * });\n * object.filters.push(filter);\n * object.applyFilters();\n */\nexport class Gamma extends BaseFilter<typeof GAMMA, GammaOwnProps> {\n  /**\n   * Gamma array value, from 0.01 to 2.2.\n   * @param {Array} gamma\n   * @default\n   */\n  declare gamma: GammaOwnProps['gamma'];\n  declare rgbValues?: {\n    r: Uint8Array;\n    g: Uint8Array;\n    b: Uint8Array;\n  };\n\n  static type = GAMMA;\n\n  static defaults = gammaDefaultValues;\n\n  static uniformLocations = ['uGamma'];\n\n  getFragmentSource() {\n    return fragmentSource;\n  }\n\n  constructor(options: { gamma?: GammaInput } = {}) {\n    super(options);\n    this.gamma =\n      options.gamma ||\n      ((\n        this.constructor as typeof Gamma\n      ).defaults.gamma.concat() as GammaInput);\n  }\n\n  /**\n   * Apply the Gamma operation to a Uint8Array representing the pixels of an image.\n   *\n   * @param {Object} options\n   * @param {ImageData} options.imageData The Uint8Array to be filtered.\n   */\n  applyTo2d({ imageData: { data } }: T2DPipelineState) {\n    const gamma = this.gamma,\n      rInv = 1 / gamma[0],\n      gInv = 1 / gamma[1],\n      bInv = 1 / gamma[2];\n\n    if (!this.rgbValues) {\n      this.rgbValues = {\n        r: new Uint8Array(256),\n        g: new Uint8Array(256),\n        b: new Uint8Array(256),\n      };\n    }\n\n    // This is an optimization - pre-compute a look-up table for each color channel\n    // instead of performing these pow calls for each pixel in the image.\n    const rgb = this.rgbValues;\n    for (let i = 0; i < 256; i++) {\n      rgb.r[i] = Math.pow(i / 255, rInv) * 255;\n      rgb.g[i] = Math.pow(i / 255, gInv) * 255;\n      rgb.b[i] = Math.pow(i / 255, bInv) * 255;\n    }\n    for (let i = 0; i < data.length; i += 4) {\n      data[i] = rgb.r[data[i]];\n      data[i + 1] = rgb.g[data[i + 1]];\n      data[i + 2] = rgb.b[data[i + 2]];\n    }\n  }\n\n  /**\n   * Send data from this filter to its shader program's uniforms.\n   *\n   * @param {WebGLRenderingContext} gl The GL canvas context used to compile this filter's shader.\n   * @param {Object} uniformLocations A map of string uniform names to WebGLUniformLocation objects\n   */\n  sendUniformData(\n    gl: WebGLRenderingContext,\n    uniformLocations: TWebGLUniformLocationMap,\n  ) {\n    gl.uniform3fv(uniformLocations.uGamma, this.gamma);\n  }\n\n  isNeutralState() {\n    const { gamma } = this;\n    return gamma[0] === 1 && gamma[1] === 1 && gamma[2] === 1;\n  }\n\n  toObject(): { type: typeof GAMMA; gamma: GammaInput } {\n    return {\n      type: GAMMA,\n      gamma: this.gamma.concat() as GammaInput,\n    };\n  }\n}\n\nclassRegistry.setClass(Gamma);\n"],"names":["GAMMA","gammaDefaultValues","gamma","Gamma","BaseFilter","getFragmentSource","fragmentSource","constructor","options","arguments","length","undefined","defaults","concat","applyTo2d","_ref","imageData","data","rInv","gInv","bInv","rgbValues","r","Uint8Array","g","b","rgb","i","Math","pow","sendUniformData","gl","uniformLocations","uniform3fv","uGamma","isNeutralState","toObject","type","_defineProperty","classRegistry","setClass"],"mappings":";;;;;AAKA,MAAMA,KAAK,GAAG,OAAgB,CAAA;AAQvB,MAAMC,kBAAiC,GAAG;AAC/CC,EAAAA,KAAK,EAAE,CAAC,CAAC,EAAE,CAAC,EAAE,CAAC,CAAA;AACjB,EAAC;;AAED;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACO,MAAMC,KAAK,SAASC,UAAU,CAA8B;AAmBjEC,EAAAA,iBAAiBA,GAAG;AAClB,IAAA,OAAOC,cAAc,CAAA;AACvB,GAAA;AAEAC,EAAAA,WAAWA,GAAuC;AAAA,IAAA,IAAtCC,OAA+B,GAAAC,SAAA,CAAAC,MAAA,GAAA,CAAA,IAAAD,SAAA,CAAA,CAAA,CAAA,KAAAE,SAAA,GAAAF,SAAA,CAAA,CAAA,CAAA,GAAG,EAAE,CAAA;IAC9C,KAAK,CAACD,OAAO,CAAC,CAAA;AACd,IAAA,IAAI,CAACN,KAAK,GACRM,OAAO,CAACN,KAAK,IAEX,IAAI,CAACK,WAAW,CAChBK,QAAQ,CAACV,KAAK,CAACW,MAAM,EAAiB,CAAA;AAC5C,GAAA;;AAEA;AACF;AACA;AACA;AACA;AACA;EACEC,SAASA,CAAAC,IAAA,EAA4C;IAAA,IAA3C;AAAEC,MAAAA,SAAS,EAAE;AAAEC,QAAAA,IAAAA;AAAK,OAAA;AAAoB,KAAC,GAAAF,IAAA,CAAA;AACjD,IAAA,MAAMb,KAAK,GAAG,IAAI,CAACA,KAAK;AACtBgB,MAAAA,IAAI,GAAG,CAAC,GAAGhB,KAAK,CAAC,CAAC,CAAC;AACnBiB,MAAAA,IAAI,GAAG,CAAC,GAAGjB,KAAK,CAAC,CAAC,CAAC;AACnBkB,MAAAA,IAAI,GAAG,CAAC,GAAGlB,KAAK,CAAC,CAAC,CAAC,CAAA;AAErB,IAAA,IAAI,CAAC,IAAI,CAACmB,SAAS,EAAE;MACnB,IAAI,CAACA,SAAS,GAAG;AACfC,QAAAA,CAAC,EAAE,IAAIC,UAAU,CAAC,GAAG,CAAC;AACtBC,QAAAA,CAAC,EAAE,IAAID,UAAU,CAAC,GAAG,CAAC;AACtBE,QAAAA,CAAC,EAAE,IAAIF,UAAU,CAAC,GAAG,CAAA;OACtB,CAAA;AACH,KAAA;;AAEA;AACA;AACA,IAAA,MAAMG,GAAG,GAAG,IAAI,CAACL,SAAS,CAAA;IAC1B,KAAK,IAAIM,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAG,GAAG,EAAEA,CAAC,EAAE,EAAE;AAC5BD,MAAAA,GAAG,CAACJ,CAAC,CAACK,CAAC,CAAC,GAAGC,IAAI,CAACC,GAAG,CAACF,CAAC,GAAG,GAAG,EAAET,IAAI,CAAC,GAAG,GAAG,CAAA;AACxCQ,MAAAA,GAAG,CAACF,CAAC,CAACG,CAAC,CAAC,GAAGC,IAAI,CAACC,GAAG,CAACF,CAAC,GAAG,GAAG,EAAER,IAAI,CAAC,GAAG,GAAG,CAAA;AACxCO,MAAAA,GAAG,CAACD,CAAC,CAACE,CAAC,CAAC,GAAGC,IAAI,CAACC,GAAG,CAACF,CAAC,GAAG,GAAG,EAAEP,IAAI,CAAC,GAAG,GAAG,CAAA;AAC1C,KAAA;AACA,IAAA,KAAK,IAAIO,CAAC,GAAG,CAAC,EAAEA,CAAC,GAAGV,IAAI,CAACP,MAAM,EAAEiB,CAAC,IAAI,CAAC,EAAE;AACvCV,MAAAA,IAAI,CAACU,CAAC,CAAC,GAAGD,GAAG,CAACJ,CAAC,CAACL,IAAI,CAACU,CAAC,CAAC,CAAC,CAAA;AACxBV,MAAAA,IAAI,CAACU,CAAC,GAAG,CAAC,CAAC,GAAGD,GAAG,CAACF,CAAC,CAACP,IAAI,CAACU,CAAC,GAAG,CAAC,CAAC,CAAC,CAAA;AAChCV,MAAAA,IAAI,CAACU,CAAC,GAAG,CAAC,CAAC,GAAGD,GAAG,CAACD,CAAC,CAACR,IAAI,CAACU,CAAC,GAAG,CAAC,CAAC,CAAC,CAAA;AAClC,KAAA;AACF,GAAA;;AAEA;AACF;AACA;AACA;AACA;AACA;AACEG,EAAAA,eAAeA,CACbC,EAAyB,EACzBC,gBAA0C,EAC1C;IACAD,EAAE,CAACE,UAAU,CAACD,gBAAgB,CAACE,MAAM,EAAE,IAAI,CAAChC,KAAK,CAAC,CAAA;AACpD,GAAA;AAEAiC,EAAAA,cAAcA,GAAG;IACf,MAAM;AAAEjC,MAAAA,KAAAA;AAAM,KAAC,GAAG,IAAI,CAAA;AACtB,IAAA,OAAOA,KAAK,CAAC,CAAC,CAAC,KAAK,CAAC,IAAIA,KAAK,CAAC,CAAC,CAAC,KAAK,CAAC,IAAIA,KAAK,CAAC,CAAC,CAAC,KAAK,CAAC,CAAA;AAC3D,GAAA;AAEAkC,EAAAA,QAAQA,GAA8C;IACpD,OAAO;AACLC,MAAAA,IAAI,EAAErC,KAAK;AACXE,MAAAA,KAAK,EAAE,IAAI,CAACA,KAAK,CAACW,MAAM,EAAC;KAC1B,CAAA;AACH,GAAA;AACF,CAAA;AA1FE;AACF;AACA;AACA;AACA;AAJEyB,eAAA,CADWnC,KAAK,EAAA,MAAA,EAaFH,KAAK,CAAA,CAAA;AAAAsC,eAAA,CAbRnC,KAAK,EAAA,UAAA,EAeEF,kBAAkB,CAAA,CAAA;AAAAqC,eAAA,CAfzBnC,KAAK,EAiBU,kBAAA,EAAA,CAAC,QAAQ,CAAC,CAAA,CAAA;AA4EtCoC,aAAa,CAACC,QAAQ,CAACrC,KAAK,CAAC;;;;"}