camstreamerlib/esm/CamOverlayPainter/ResourceManager.js

Helper library for CamStreamer ACAP applications.

import * as fs from 'fs/promises';
export default class ResourceManager {
    co;
    imgFileNames = {};
    fontFileNames = {};
    images = {};
    fonts = {};
    constructor(co) {
        this.co = co;
    }
    registerImage(moniker, fileName) {
        this.imgFileNames[moniker] = process.env.INSTALL_PATH + '/images/' + fileName;
    }
    registerFont(moniker, fileName) {
        this.fontFileNames[moniker] = process.env.INSTALL_PATH + '/fonts/' + fileName;
    }
    async image(moniker) {
        if (this.images[moniker] !== undefined) {
            return this.images[moniker];
        }
        if (this.imgFileNames[moniker] !== undefined) {
            const imgData = await fs.readFile(this.imgFileNames[moniker]);
            this.images[moniker] = await this.co.uploadImageData(imgData);
            return this.images[moniker];
        }
        throw new Error('Error! Unknown image requested!');
    }
    async font(moniker) {
        if (this.fonts[moniker] !== undefined) {
            return this.fonts[moniker];
        }
        if (this.fontFileNames[moniker] !== undefined) {
            const fontData = await fs.readFile(this.fontFileNames[moniker]);
            this.fonts[moniker] = await this.co.uploadFontData(fontData);
            return this.fonts[moniker];
        }
        throw new Error('Error! Unknown font requested!');
    }
    clear() {
        this.images = {};
        this.fonts = {};
    }
}