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Re: Accessing rendered image data

From: Eli Zaretskii
Subject: Re: Accessing rendered image data
Date: Tue, 28 Jun 2016 19:36:19 +0300

> From: Lars Magne Ingebrigtsen <address@hidden>
> Date: Tue, 28 Jun 2016 17:37:23 +0200
> Lars Magne Ingebrigtsen <address@hidden> writes:
> > If I have an image in a buffer, is there a way to access the displayed
> > image glyph data from Emacs Lisp?
> >
> > The glyph is presumably a ... block of bytes with a width/height
> > number...  or something.
> The reason I'm asking is because I'm trying to asses the width of
> rendered text in an SVG image, but perhaps I can just render the text
> normally in Emacs.

I don't understand what that means.  You can obtain the size of an SVG
image by using image-size.  Text that is part of an image is not
accessible to Emacs, AFAIK, so what exactly did you have in mind?

> However, I can't make head or tails or the "advanced" face/font stuff in
> the manual.

Why font is relevant to the size of the text?  Does
window-text-pixel-size do what you want?

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