support for base64

[aleDaniel00]

I have tried to pass as src parameter of the canvas-viewer a clean base64 string and does not render the file, I tried to convert it to Uint8Array and top recognizes the format, there is some way that the module can recognize base64 coming from an angular http service.

Cannot read property 'refresh' of null -> CanvasViewer.js:174:15
data:application/pdf;base64,[object ArrayBuffer] net::ERR_INVALID_URL -> FormatReader.js 307

Any help or track be very grateful.

[hunguyenv]

@aleDaniel00 For PDF and Tiff, Need to ensure that your src is a Blob
base64 strings are for simple image like png, jpg only.

var pdfSrc = new Blob([yourUinit8Array], {type: 'application/pdf'});