4e12906061
- Over time the number and size of these factories have increased, especially the `DOMFilterFactory` class, and this split should thus aid readability/maintainability of the code. - By introducing a couple of new import maps we can avoid bundling the `DOMCMapReaderFactory`/`DOMStandardFontDataFactory` classes in the Firefox PDF Viewer, since they are dead code there given that worker-thread fetching is always being used. - This patch has been successfully tested, by running `$ ./mach test toolkit/components/pdfjs/`, in a local Firefox artifact-build. *Note:* This patch reduces the size of the `gulp mozcentral` output by `1.3` kilo-bytes, which isn't a lot but still cannot hurt.
93 lines
2.5 KiB
JavaScript
93 lines
2.5 KiB
JavaScript
/* Copyright 2015 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { unreachable } from "../shared/util.js";
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class BaseCanvasFactory {
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#enableHWA = false;
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constructor({ enableHWA = false }) {
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if (
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(typeof PDFJSDev === "undefined" || PDFJSDev.test("TESTING")) &&
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this.constructor === BaseCanvasFactory
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) {
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unreachable("Cannot initialize BaseCanvasFactory.");
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}
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this.#enableHWA = enableHWA;
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}
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create(width, height) {
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if (width <= 0 || height <= 0) {
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throw new Error("Invalid canvas size");
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}
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const canvas = this._createCanvas(width, height);
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return {
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canvas,
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context: canvas.getContext("2d", {
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willReadFrequently: !this.#enableHWA,
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}),
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};
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}
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reset(canvasAndContext, width, height) {
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if (!canvasAndContext.canvas) {
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throw new Error("Canvas is not specified");
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}
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if (width <= 0 || height <= 0) {
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throw new Error("Invalid canvas size");
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}
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canvasAndContext.canvas.width = width;
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canvasAndContext.canvas.height = height;
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}
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destroy(canvasAndContext) {
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if (!canvasAndContext.canvas) {
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throw new Error("Canvas is not specified");
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}
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// Zeroing the width and height cause Firefox to release graphics
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// resources immediately, which can greatly reduce memory consumption.
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canvasAndContext.canvas.width = 0;
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canvasAndContext.canvas.height = 0;
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canvasAndContext.canvas = null;
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canvasAndContext.context = null;
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}
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/**
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* @ignore
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*/
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_createCanvas(width, height) {
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unreachable("Abstract method `_createCanvas` called.");
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}
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}
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class DOMCanvasFactory extends BaseCanvasFactory {
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constructor({ ownerDocument = globalThis.document, enableHWA = false }) {
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super({ enableHWA });
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this._document = ownerDocument;
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}
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/**
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* @ignore
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*/
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_createCanvas(width, height) {
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const canvas = this._document.createElement("canvas");
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canvas.width = width;
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canvas.height = height;
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return canvas;
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}
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}
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export { BaseCanvasFactory, DOMCanvasFactory };
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