Load a custom ttf font about prawn-rails HOT 10 CLOSED

Oh well. I may consider tightening up Prawn's public API to not allow that but as of right now you should make sure you're providing proper data to Prawn.

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This code only updates a hash. It doesn't load fonts or do anything else. This operation is not expensive and won't save you much CPU time to move it into initializer. Do it wherever you instantiate a document.

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In fact I want to load custom fonts globally

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Make it a constant if you want to keep only one instance of the list:

MY_FONTS = {
  "Helvetica": {
    normal: Rails.root.join("app/assets/fonts/Helvetica.ttf"),
    italic: Rails.root.join("app/assets/fonts/Helvetica-Oblique.ttf"),
    bold: Rails.root.join("app/assets/fonts/app/assets/fonts/Helvetica-Bold.ttf"),
    bold_italic: Rails.root.join("app/assets/fonts/Helvetica-BoldOblique.ttf"),
  }
}

Elsewhere:

pdf.font_families.update(MY_FONTS)

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I think I mis-express myself

When I execute rspec, `prawn| is loaded with some afm fonts, and I need to load ttf fonts

I have an error when executing my spec

/usr/share/gems/gems/prawn-2.2.2/lib/prawn/font/afm.rb:105:in `normalize_encoding'

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AFM is not a font. It's a font metric. It basically contains only character sizes and advances (how far cursor should move after a specific character). Those are only present for so called PDF built-in fonts. Those are 14 actual Adobe fonts that should be distributed with any PDF renderer (software that reads PDF files and produces some sort of image, either for displaying on a screen, or printing, or saving to a file, etc.). The AFM files used in Prawn for laying out the text but no actual fonts ever included in the PDFs. That is when you us any of those default fonts. The code is not used when you use a TTF font.

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As I understand, ttf fonts SHOULD be included on the software which read pdf ?

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These 14 default fonts — yes. Any other font has to be embedded into PDF file. Thats's what happens when you use your own TTF fonts with Prawn.

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Thanks for explaination 😛

It appears that my problem was about a nil that was sent in https://github.com/prawnpdf/prawn/blob/master/lib/prawn/font/afm.rb#L108 (because of a nilable field in database)

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I've found a way to do this 😛 but up to you to choose between allowing nil or documenting this

I can also provide any PR, if you want 😜

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