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{ PNG } from 'pngjs';\nimport { throwError, isNodePattern } from '@jimp/utils';\n\nconst MIME_TYPE = 'image/png';\n\n// PNG filter types\nconst PNG_FILTER_AUTO = -1;\nconst PNG_FILTER_NONE = 0;\nconst PNG_FILTER_SUB = 1;\nconst PNG_FILTER_UP = 2;\nconst PNG_FILTER_AVERAGE = 3;\nconst PNG_FILTER_PATH = 4;\n\nexport default () => ({\n  mime: { [MIME_TYPE]: ['png'] },\n\n  constants: {\n    MIME_PNG: MIME_TYPE,\n    PNG_FILTER_AUTO,\n    PNG_FILTER_NONE,\n    PNG_FILTER_SUB,\n    PNG_FILTER_UP,\n    PNG_FILTER_AVERAGE,\n    PNG_FILTER_PATH\n  },\n\n  hasAlpha: { [MIME_TYPE]: true },\n  decoders: { [MIME_TYPE]: PNG.sync.read },\n  encoders: {\n    [MIME_TYPE]: data => {\n      const png = new PNG({\n        width: data.bitmap.width,\n        height: data.bitmap.height\n      });\n\n      png.data = data.bitmap.data;\n\n      return PNG.sync.write(png, {\n        width: data.bitmap.width,\n        height: data.bitmap.height,\n        deflateLevel: data._deflateLevel,\n        deflateStrategy: data._deflateStrategy,\n        filterType: data._filterType,\n        colorType:\n          typeof data._colorType === 'number'\n            ? data._colorType\n            : data._rgba\n              ? 6\n              : 2,\n        inputHasAlpha: data._rgba\n      });\n    }\n  },\n\n  class: {\n    _deflateLevel: 9,\n    _deflateStrategy: 3,\n    _filterType: PNG_FILTER_AUTO,\n    _colorType: null,\n\n    /**\n     * Sets the deflate level used when saving as PNG format (default is 9)\n     * @param {number} l Deflate level to use 0-9. 0 is no compression. 9 (default) is maximum compression.\n     * @param {function(Error, Jimp)} cb (optional) a callback for when complete\n     * @returns {Jimp} this for chaining of methods\n     */\n    deflateLevel(l, cb) {\n      if (typeof l !== 'number') {\n        return throwError.call(this, 'l must be a number', cb);\n      }\n\n      if (l < 0 || l > 9) {\n        return throwError.call(this, 'l must be a number 0 - 9', cb);\n      }\n\n      this._deflateLevel = Math.round(l);\n\n      if (isNodePattern(cb)) {\n        cb.call(this, null, this);\n      }\n\n      return this;\n    },\n\n    /**\n     * Sets the deflate strategy used when saving as PNG format (default is 3)\n     * @param {number} s Deflate strategy to use 0-3.\n     * @param {function(Error, Jimp)} cb (optional) a callback for when complete\n     * @returns {Jimp} this for chaining of methods\n     */\n    deflateStrategy(s, cb) {\n      if (typeof s !== 'number') {\n        return throwError.call(this, 's must be a number', cb);\n      }\n\n      if (s < 0 || s > 3) {\n        return throwError.call(this, 's must be a number 0 - 3', cb);\n      }\n\n      this._deflateStrategy = Math.round(s);\n\n      if (isNodePattern(cb)) {\n        cb.call(this, null, this);\n      }\n\n      return this;\n    },\n\n    /**\n     * Sets the filter type used when saving as PNG format (default is automatic filters)\n     * @param {number} f The quality to use -1-4.\n     * @param {function(Error, Jimp)} cb (optional) a callback for when complete\n     * @returns {Jimp} this for chaining of methods\n     */\n    filterType(f, cb) {\n      if (typeof f !== 'number') {\n        return throwError.call(this, 'n must be a number', cb);\n      }\n\n      if (f < -1 || f > 4) {\n        return throwError.call(\n          this,\n          'n must be -1 (auto) or a number 0 - 4',\n          cb\n        );\n      }\n\n      this._filterType = Math.round(f);\n\n      if (isNodePattern(cb)) {\n        cb.call(this, null, this);\n      }\n\n      return this;\n    },\n    /**\n     * Sets the color type used when saving as PNG format\n     * @param {number} s color type to use 0, 2, 4, 6.\n     * @param {function(Error, Jimp)} cb (optional) a callback for when complete\n     * @returns {Jimp} this for chaining of methods\n     */ colorType(s, cb) {\n      if (typeof s !== 'number') {\n        return throwError.call(this, 's must be a number', cb);\n      }\n\n      if (s !== 0 && s !== 2 && s !== 4 && s !== 6) {\n        return throwError.call(this, 's must be a number 0, 2, 4, 6.', cb);\n      }\n\n      this._colorType = Math.round(s);\n\n      if (isNodePattern(cb)) {\n        cb.call(this, null, this);\n      }\n\n      return this;\n    }\n  }\n});\n"],"file":"index.js"}