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Improve the instructions and code for the pdf2png example #9618

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Apr 1, 2018
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Improve the instructions and code for the pdf2png example #9618

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7 changes: 4 additions & 3 deletions examples/node/pdf2png/README.md
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Expand Up @@ -4,12 +4,13 @@ Example to demonstrate converting a PDF file to a PNG image using the PDF.js lib

## Getting started

Install the dependencies and build the project:
Install the dependencies and build the PDF.js library:

$ npm install
$ gulp dist
$ gulp dist-install

Install the Node canvas library to convert the first page of a PDF file to a PNG image:
Install the Node canvas library and run the example to convert the first page of a
PDF file to a PNG image:

$ npm install canvas
$ cd examples/node/pdf2png
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12 changes: 9 additions & 3 deletions examples/node/pdf2png/pdf2png.js
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Expand Up @@ -51,13 +51,19 @@ NodeCanvasFactory.prototype = {
var pdfjsLib = require('pdfjs-dist');

// Relative path of the PDF file.
var pdfURL = '../../helloworld/helloworld.pdf';
var pdfURL = '../../../web/compressed.tracemonkey-pldi-09.pdf';

// Read the PDF file into a typed array so PDF.js can load it.
var rawData = new Uint8Array(fs.readFileSync(pdfURL));

// Load the PDF file.
pdfjsLib.getDocument(rawData).then(function (pdfDocument) {
// Load the PDF file. The `disableFontFace` and `nativeImageDecoderSupport`
// options must be passed because Node.js has no native `@font-face` and
// `Image` support.
pdfjsLib.getDocument({
data: rawData,
disableFontFace: true,
nativeImageDecoderSupport: 'none',
}).then(function (pdfDocument) {
console.log('# PDF document loaded.');

// Get the first page.
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