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This unifies the various factory-options, since it's consistent with `CMapReaderFactory`/`StandardFontDataFactory`, and ensures that any needed parameters will always be consistently provided when creating `CanvasFactory`/`FilterFactory`-instances. As shown in the modified example this may simplify some custom implementations, since we now provide the ability to access the `CanvasFactory`-instance used with a particular `getDocument`-invocation.
Overview
Example to demonstrate converting a PDF file to a PNG image using the PDF.js library.
Getting started
Install the dependencies and build the PDF.js library:
$ npm install
$ gulp dist-install
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
$ node pdf2png.js