pdf-to-png-converter-allow-yarn/out/node.canvas.factory.js

Node.js utility to convert PDF file/buffer pages to PNG files/buffers with no native dependencies.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.NodeCanvasFactory = void 0;
const canvas_1 = require("@napi-rs/canvas");
const node_assert_1 = require("node:assert");
class NodeCanvasFactory {
    /**
     * Creates a new canvas context with the specified width and height.
     * @param width The width of the canvas.
     * @param height The height of the canvas.
     * @returns A new canvas context with the specified width and height.
     * @throws An error if the width or height is less than or equal to zero.
     */
    create(width, height) {
        const canvas = new canvas_1.Canvas(width, height);
        return {
            canvas,
            context: canvas.getContext('2d'),
        };
    }
    /**
     * Resets the canvas to the specified width and height.
     * @param canvasAndContext - The canvas and its context.
     * @param width - The new width of the canvas.
     * @param height - The new height of the canvas.
     */
    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;
    }
    /**
     * Destroys the canvas and its context by setting the canvas width and height to 0 and
     * setting the canvas and context properties to undefined.
     * @param canvasAndContext - The canvas and its context to be destroyed.
     */
    destroy(canvasAndContext) {
        (0, node_assert_1.strict)(canvasAndContext.canvas, 'Canvas is not specified');
        canvasAndContext.canvas = undefined;
        canvasAndContext.context = undefined;
    }
}
exports.NodeCanvasFactory = NodeCanvasFactory;