diff --git a/src/core/config/Categories.json b/src/core/config/Categories.json index 0ab9b1e5..411f980f 100755 --- a/src/core/config/Categories.json +++ b/src/core/config/Categories.json @@ -366,7 +366,8 @@ "Dither Image", "Invert Image", "Flip Image", - "Crop Image" + "Crop Image", + "Image Brightness / Contrast" ] }, { diff --git a/src/core/operations/ImageBrightnessContrast.mjs b/src/core/operations/ImageBrightnessContrast.mjs new file mode 100644 index 00000000..51c61c70 --- /dev/null +++ b/src/core/operations/ImageBrightnessContrast.mjs @@ -0,0 +1,91 @@ +/** + * @author j433866 [j433866@gmail.com] + * @copyright Crown Copyright 2019 + * @license Apache-2.0 + */ + +import Operation from "../Operation"; +import OperationError from "../errors/OperationError"; +import Magic from "../lib/Magic"; +import { toBase64 } from "../lib/Base64.mjs"; +import jimp from "jimp"; + +/** + * Image Brightness / Contrast operation + */ +class ImageBrightnessContrast extends Operation { + + /** + * ImageBrightnessContrast constructor + */ + constructor() { + super(); + + this.name = "Image Brightness / Contrast"; + this.module = "Image"; + this.description = "Adjust the brightness and contrast of an image."; + this.infoURL = ""; + this.inputType = "byteArray"; + this.outputType = "byteArray"; + this.presentType = "html"; + this.args = [ + { + name: "Brightness", + type: "number", + value: 0, + min: -100, + max: 100 + }, + { + name: "Contrast", + type: "number", + value: 0, + min: -100, + max: 100 + } + ]; + } + + /** + * @param {byteArray} input + * @param {Object[]} args + * @returns {byteArray} + */ + async run(input, args) { + const [brightness, contrast] = args; + const type = Magic.magicFileType(input); + if (!type || type.mime.indexOf("image") !== 0){ + throw new OperationError("Invalid file type."); + } + + const image = await jimp.read(Buffer.from(input)); + image.brightness(brightness / 100); + image.contrast(contrast / 100); + + const imageBuffer = await image.getBufferAsync(jimp.AUTO); + return [...imageBuffer]; + } + + /** + * Displays the image using HTML for web apps + * @param {byteArray} data + * @returns {html} + */ + present(data) { + if (!data.length) return ""; + + let dataURI = "data:"; + const type = Magic.magicFileType(data); + if (type && type.mime.indexOf("image") === 0){ + dataURI += type.mime + ";"; + } else { + throw new OperationError("Invalid file type"); + } + dataURI += "base64," + toBase64(data); + + return ""; + } + +} + +export default ImageBrightnessContrast;