feat: Pixels to Points

[wilsondealmeida]

Motivation

Convert pixels to points.
Useful when you are working with images.

Example:

1.px
=> 0.75 # points

800.px
=> 600.0 # points

[gettalong]

The number "72" comes from the PDF specification. Where does the number "96" come from?

As far as I'm aware the standard DPI seems to be 96 but DPI can be changed by the user.

[pointlessone]

Thank you for your contribution.

PDF has no concept of a sized pixel as such. So length can not be converted to pixels and vice versa. This conversion is completely a CSS thing (CSS Values and Units Module Level 3, Absolute Lengths). I understand when you might want this but this is outside of PDF so I'd rather keep it outside of Prawn.

I suggest you use a refinement in your application.

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I'm closing this for the reason above but feel free to continue discussion and suggest other improvements.