UNPKG

sharp-cli

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/*! * The MIT License (MIT) * * Copyright (c) 2019 Mark van Seventer * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of * the Software, and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ // @see https://sharp.pixelplumbing.com/api-operation#threshold // Strict mode. 'use strict' // Local modules. const queue = require('../../lib/queue') // Configure. const positionals = { value: { desc: 'A value in the range 0-255 representing the level at which the threshold will be applied', defaultDescription: 128, type: 'number' } } const options = { greyscale: { alias: 'grayscale', desc: 'Convert to single channel greyscale', type: 'boolean' } } // Command builder. const builder = (yargs) => { const optionNames = Object.keys(options) return yargs .strict() .epilog('For more information on available options, please visit https://sharp.pixelplumbing.com/api-operation#threshold') .positional('value', positionals.value) .options(options) .group(optionNames, 'Command Options') } // Command handler. const handler = (args) => { return queue.push(['threshold', (sharp) => { return sharp.threshold(args.value, { greyscale: args.greyscale }) }]) } // Exports. module.exports = { command: 'threshold [value]', describe: 'Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0', builder, handler }