[cairo] Font pixel height

[Andreas Falkenhahn]

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 at falkenhahn.com