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Re: Pixel-based display functions

From: Eli Zaretskii
Subject: Re: Pixel-based display functions
Date: Wed, 28 Jan 2015 17:27:13 +0200

> From: Lars Ingebrigtsen <address@hidden>
> Date: Wed, 28 Jan 2015 14:27:17 +1100
> shr needs three functions to be kind-of fast to work:
> 1) A pixel equivalent of `current-column'

You already have it:

  (car (nth 2 (posn-at-point)))

> 2) A pixel equivalent of `move-to-column' (which will be imprecise, of
> course, but that's OK)

You already have it (albeit not necessarily where you'd look ;-):

  (vertical-motion (cons (/ PIXELS (frame-char-width)) 0))

> 3) A pixel equivalent of `string-width'

Didn't we just go through using font-get-glyphs for that?

Or just insert the string into the current buffer and use
posn-at-point to see how many pixels it took.

Do the above fix your problems?

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