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List:       cairo
Subject:    [cairo] Font pixel height
From:       Andreas Falkenhahn <andreas () falkenhahn ! com>
Date:       2022-08-09 10:10:23
Message-ID: 1745228449.20220809121023 () falkenhahn ! com
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Hi,

strictly speaking this question is about Pango but since I didn't find a Pango \
mailing list and I use Cairo to render my Pango layouts I hope it's ok to ask this \
question here :)

I want to create a font that uses a specific pixel height, so I do something like \
this:

	fontmap = pango_cairo_font_map_new();
	fontdesc = pango_font_description_from_string("Liberation 144px");
	context = pango_font_map_create_context(fontmap);
	font = pango_font_map_load_font(fontmap, context, fontdesc);
	m = pango_font_get_metrics(font, NULL);
	
	height = pango_font_metrics_get_height(m) / PANGO_SCALE;

Surprisingly, "height" is now 167 even though I requested a font height of 144 \
pixels. Is there any way to create a font whose pixel height is exactly or at least \
closely what I requested? Currently, there seems to be a rather significant deviation \
from the requested pixel size and the actual pixel height, e.g. I'm getting a font \
whose height is 167 pixels when requesting a 144 pixel font. 

Thanks!

-- 
Best regards,
 Andreas Falkenhahn                          mailto:andreas@falkenhahn.com


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