voluptasquisquam/src/image/transform/__tests__/rgba8.js

Image processing and manipulation in JavaScript

import {Image} from 'test/common';
import 'should';

describe('check the rgba8 transform', function () {
    it('check the right result for GREY image 8 bit', function () {
        let image = new Image(2, 1,
            [
                10, 20
            ],
            {kind: 'GREY'}
        );

        let newImage = image.rgba8();

        Array.from(newImage.data).should.eql(
            [10, 10, 10, 255, 20, 20, 20, 255]
        );
    });

    it('check the right result for GREY A image 8 bit', function () {
        let image = new Image(2, 1,
            [
                10, 127, 20, 255
            ],
            {kind: 'GREYA'}
        );

        let newImage = image.rgba8();

        Array.from(newImage.data).should.eql(
            [10, 10, 10, 127, 20, 20, 20, 255]
        );
    });

    it('check the right result for RGB A image 8 bit', function () {
        let image = new Image(2, 1,
            [
                10, 20, 30, 40, 50, 60
            ],
            {kind: 'RGB'}
        );

        let newImage = image.rgba8();

        Array.from(newImage.data).should.eql(
            [10, 20, 30, 255, 40, 50, 60, 255]
        );
    });

    it('check the right result for RGB A image 16 bit', function () {
        let image = new Image(2, 1,
            [
                10 << 8, 20 << 8, 30 << 8, 40 << 8, 50 << 8, 60 << 8
            ],
            {kind: 'RGB', bitDepth: 16}
        );

        let newImage = image.rgba8();

        Array.from(newImage.data).should.eql(
            [10, 20, 30, 255, 40, 50, 60, 255]
        );
    });

});