multi-automator/lib/utils/image.js

Multi terminal automation

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.extract = void 0;
/**
 * @desc: image operate
 * @author: john_chen
 * @date: 2025.03.15
 */
const sharp_1 = __importDefault(require("sharp"));
const config_1 = require("../config");
/**
 * 图像裁切
 *
 * @param {Buffer} imageBuffer
 * @param {Object} bounds
 * @return {Promise{Buffer}}
 */
async function extract(imageBuffer, bounds) {
    let { x, y, width, height } = bounds;
    // 进 1
    let ceilX = Math.ceil(x);
    let ceilY = Math.ceil(y);
    if (ceilX > x) {
        width = width - (ceilX - x);
    }
    if (ceilY > y) {
        height = height - (ceilY - y);
    }
    // 去掉小数部分
    let floorWidth = Math.floor(width);
    let floorHeight = Math.floor(height);
    if (floorWidth < 1 || floorHeight < 1) {
        throw new Error(`The height and width must be at least 1, received: height=${height} width=${width}`);
    }
    config_1.logger.info(`[image.extract] Bounds: ${JSON.stringify({ x: ceilX, y: ceilY, width: floorWidth, height: floorHeight })}`);
    let res = await (0, sharp_1.default)(imageBuffer).extract({
        left: ceilX,
        top: ceilY,
        width: floorWidth,
        height: floorHeight
    }).png().toBuffer();
    return res;
}
exports.extract = extract;
;