@nova-slides/pdf-to-img/dist/canvasFactory.js

📃📸 Converts PDFs to images in nodejs

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.NodeCanvasFactory = void 0;
const node_assert_1 = require("node:assert");
const canvas_1 = __importDefault(require("canvas"));
class NodeCanvasFactory {
    /* eslint-disable class-methods-use-this, no-param-reassign */
    create(width, height) {
        (0, node_assert_1.strict)(width > 0 && height > 0, "Invalid canvas size");
        const canvas = canvas_1.default.createCanvas(width, height);
        const context = canvas.getContext("2d");
        return {
            canvas,
            context,
        };
    }
    reset(canvasAndContext, width, height) {
        (0, node_assert_1.strict)(canvasAndContext.canvas, "Canvas is not specified");
        (0, node_assert_1.strict)(width > 0 && height > 0, "Invalid canvas size");
        canvasAndContext.canvas.width = width;
        canvasAndContext.canvas.height = height;
    }
    destroy(canvasAndContext) {
        (0, node_assert_1.strict)(canvasAndContext.canvas, "Canvas is not specified");
        // Zeroing the width and height cause Firefox to release graphics
        // resources immediately, which can greatly reduce memory consumption.
        canvasAndContext.canvas.width = 0;
        canvasAndContext.canvas.height = 0;
        canvasAndContext.canvas = null;
        canvasAndContext.context = null;
    }
}
exports.NodeCanvasFactory = NodeCanvasFactory;