fabric/dist/src/filters/Saturation.min.mjs.map

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

{"version":3,"file":"Saturation.min.mjs","names":[],"sources":["../../../src/filters/Saturation.ts"],"sourcesContent":["import { BaseFilter } from './BaseFilter';\nimport type { T2DPipelineState, TWebGLUniformLocationMap } from './typedefs';\nimport { classRegistry } from '../ClassRegistry';\nimport { fragmentSource } from './shaders/saturation';\n\nexport type SaturationOwnProps = {\n  saturation: number;\n};\n\nexport const saturationDefaultValues: SaturationOwnProps = {\n  saturation: 0,\n};\n\n/**\n * Saturate filter class\n * @example\n * const filter = new Saturation({\n *   saturation: 1\n * });\n * object.filters.push(filter);\n * object.applyFilters();\n */\nexport class Saturation extends BaseFilter<'Saturation', SaturationOwnProps> {\n  /**\n   * Saturation value, from -1 to 1.\n   * Increases/decreases the color saturation.\n   * A value of 0 has no effect.\n   *\n   * @param {Number} saturation\n   */\n  declare saturation: SaturationOwnProps['saturation'];\n\n  static type = 'Saturation';\n\n  static defaults = saturationDefaultValues;\n\n  static uniformLocations = ['uSaturation'];\n\n  getFragmentSource() {\n    return fragmentSource;\n  }\n\n  /**\n   * Apply the Saturation operation to a Uint8ClampedArray representing the pixels of an image.\n   *\n   * @param {Object} options\n   * @param {ImageData} options.imageData The Uint8ClampedArray to be filtered.\n   */\n  applyTo2d({ imageData: { data } }: T2DPipelineState) {\n    const adjust = -this.saturation;\n    for (let i = 0; i < data.length; i += 4) {\n      const r = data[i];\n      const g = data[i + 1];\n      const b = data[i + 2];\n      const max = Math.max(r, g, b);\n      data[i] += max !== r ? (max - r) * adjust : 0;\n      data[i + 1] += max !== g ? (max - g) * adjust : 0;\n      data[i + 2] += max !== b ? (max - b) * adjust : 0;\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.uniform1f(uniformLocations.uSaturation, -this.saturation);\n  }\n\n  isNeutralState() {\n    return this.saturation === 0;\n  }\n}\n\nclassRegistry.setClass(Saturation);\n"],"mappings":"uRAsBA,IAAa,EAAb,cAAgC,CAAA,CAgB9B,mBAAA,CACE,OAAO,EAST,UAAA,CAAY,UAAA,CAAW,KAAE,IAAA,CACvB,IAAM,EAAA,CAAU,KAAK,WACrB,IAAK,IAAI,EAAI,EAAG,EAAI,EAAK,OAAQ,GAAK,EAAG,CACvC,IAAM,EAAI,EAAK,GACT,EAAI,EAAK,EAAI,GACb,EAAI,EAAK,EAAI,GACb,EAAM,KAAK,IAAI,EAAG,EAAG,EAAA,CAC3B,EAAK,IAAM,IAAQ,EAAyB,GAApB,EAAM,GAAK,EACnC,EAAK,EAAI,IAAM,IAAQ,EAAyB,GAApB,EAAM,GAAK,EACvC,EAAK,EAAI,IAAM,IAAQ,EAAyB,GAApB,EAAM,GAAK,GAU3C,gBACE,EACA,EAAA,CAEA,EAAG,UAAU,EAAiB,YAAA,CAAc,KAAK,WAAA,CAGnD,gBAAA,CACE,OAAO,KAAK,aAAe,IAAf,EAAA,EA3CP,OAAO,aAAA,CAAA,EAAA,EAEP,WAzBkD,CACzD,WAAY,EAAA,CAAA,CAAA,EAAA,EA0BL,mBAAmB,CAAC,cAAA,CAAA,CA2C7B,EAAc,SAAS,EAAA,CAAA,OAAA,KAAA"}