Try to render fonts on canvas correctly about pdf-extractor HOT 4 OPEN

@Hikariii Yep, we're running with disableFontFace=true but unfortunately a lot of PDFs fail to render for us, and we can't skip those.. We're hitting this issue: mozilla/pdf.js#4244

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Do you have any plans to implement this or can give any directions where to begin to look? Or how did you generally plan to make this work?

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If you could take a look at mozilla/pdf.js#7929 (comment) (and comments below) I would appreciate it.

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@swftvsn Not sure how to approach this. This issue is not (yet) a priority for us, because we are fine with rendering fonts as images. It is not a priority for us right now, but to point you in a direction: I'm pretty sure you need the fonts installed on the machine running nodejs.

Looking at your Pango warning that may not be the case in your setup (just a guess):

(process:36223): Pango-WARNING **: 15:46:36.286: couldn't load font 
"ABBVIT+Impact,monospace Condensed Not-Rotated 16px", modified 
variant/weight/stretch as fallback, expect ugly output.

It's something I missed the last time trying.

Still, if you render the node-canvas as image (png/jpg) it may be enough to set disableFontFace=true and skip rendering fonts all together.

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