image-js/lib/draw/drawLineOnImage.js

Image processing and manipulation in JavaScript

import { line } from 'bresenham-zingl';
import { getDefaultColor } from '../utils/getDefaultColor.js';
import { getOutputImage } from '../utils/getOutputImage.js';
import { setBlendedVisiblePixel } from '../utils/setBlendedVisiblePixel.js';
import checkProcessable from '../utils/validators/checkProcessable.js';
import { validateColor } from '../utils/validators/validators.js';
/**
 * Draw a line defined by two points onto an image.
 * @param image - Image to process.
 * @param from - Line starting point.
 * @param to - Line ending point.
 * @param options - Draw Line options.
 * @returns The mask with the line drawing.
 */
export function drawLineOnImage(image, from, to, options = {}) {
    const newImage = getOutputImage(image, options, { clone: true });
    const { strokeColor = getDefaultColor(newImage), origin = { column: 0, row: 0 }, } = options;
    validateColor(strokeColor, newImage);
    checkProcessable(newImage, {
        bitDepth: [8, 16],
    });
    line(Math.round(origin.column + from.column), Math.round(origin.row + from.row), Math.round(origin.column + to.column), Math.round(origin.row + to.row), (column, row) => {
        setBlendedVisiblePixel(newImage, column, row, strokeColor);
    });
    return newImage;
}
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