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Added 'isImage' and 'isType' functions

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This commit is contained in:
n1474335 2018-12-26 18:40:27 +00:00
parent f355fe3447
commit f4f9b5c91c
6 changed files with 130 additions and 105 deletions
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89
src/core/operations/SplitColourChannels.mjs
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@ -7,7 +7,7 @@
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import Utils from "../Utils";
import Magic from "../lib/Magic";
import {isImage} from "../lib/FileType";
import jimp from "jimp";
@ -38,56 +38,53 @@ class SplitColourChannels extends Operation {
* @returns {List<File>}
*/
async run(input, args) {
const type = Magic.magicFileType(input);
// Make sure that the input is an image
if (type && type.mime.indexOf("image") === 0) {
const parsedImage = await jimp.read(Buffer.from(input));
if (!isImage(input)) throw new OperationError("Invalid file type.");
const red = new Promise(async (resolve, reject) => {
try {
const split = parsedImage
.clone()
.color([
{apply: "blue", params: [-255]},
{apply: "green", params: [-255]}
])
.getBufferAsync(jimp.MIME_PNG);
resolve(new File([new Uint8Array((await split).values())], "red.png", {type: "image/png"}));
} catch (err) {
reject(new OperationError(`Could not split red channel: ${err}`));
}
});
const parsedImage = await jimp.read(Buffer.from(input));
const green = new Promise(async (resolve, reject) => {
try {
const split = parsedImage.clone()
.color([
{apply: "red", params: [-255]},
{apply: "blue", params: [-255]},
]).getBufferAsync(jimp.MIME_PNG);
resolve(new File([new Uint8Array((await split).values())], "green.png", {type: "image/png"}));
} catch (err) {
reject(new OperationError(`Could not split green channel: ${err}`));
}
});
const red = new Promise(async (resolve, reject) => {
try {
const split = parsedImage
.clone()
.color([
{apply: "blue", params: [-255]},
{apply: "green", params: [-255]}
])
.getBufferAsync(jimp.MIME_PNG);
resolve(new File([new Uint8Array((await split).values())], "red.png", {type: "image/png"}));
} catch (err) {
reject(new OperationError(`Could not split red channel: ${err}`));
}
});
const blue = new Promise(async (resolve, reject) => {
try {
const split = parsedImage
.color([
{apply: "red", params: [-255]},
{apply: "green", params: [-255]},
]).getBufferAsync(jimp.MIME_PNG);
resolve(new File([new Uint8Array((await split).values())], "blue.png", {type: "image/png"}));
} catch (err) {
reject(new OperationError(`Could not split blue channel: ${err}`));
}
});
const green = new Promise(async (resolve, reject) => {
try {
const split = parsedImage.clone()
.color([
{apply: "red", params: [-255]},
{apply: "blue", params: [-255]},
]).getBufferAsync(jimp.MIME_PNG);
resolve(new File([new Uint8Array((await split).values())], "green.png", {type: "image/png"}));
} catch (err) {
reject(new OperationError(`Could not split green channel: ${err}`));
}
});
return await Promise.all([red, green, blue]);
} else {
throw new OperationError("Invalid file type.");
}
const blue = new Promise(async (resolve, reject) => {
try {
const split = parsedImage
.color([
{apply: "red", params: [-255]},
{apply: "green", params: [-255]},
]).getBufferAsync(jimp.MIME_PNG);
resolve(new File([new Uint8Array((await split).values())], "blue.png", {type: "image/png"}));
} catch (err) {
reject(new OperationError(`Could not split blue channel: ${err}`));
}
});
return await Promise.all([red, green, blue]);
}
/**