[cairo] Cairo's Arial font smaller than Arial in browsers
simon.sapin at exyr.org
Tue Mar 26 07:07:57 PDT 2013
Le 24/03/2013 15:11, Ken Resander a écrit :
> cairo_set_font_size(cr, 12); // <<<<< assume this is in pts
It’s not. It’s in cairo’s "user coordinates", which default to pixels
when drawing on screen without a scale or other transformation matrix.
> <p class="some_class" style="font-family:Arial;font-size:12pt;">This is
In CSS units, 12pt equals 16px
> The three browsers showed the text in exactly the same way. The height
> of the capital letter T was 12 pixels for the browsers and only 8 pixels
> for the Cairo output.
> Why is this?
The "font size" (both in cairo and in CSS) defines the height of the "em
box". It’s quite possible that a glyph such as T is a bit smaller than
its em box.
Try either using the px unit in CSS, or multiplying cairo font sizes by 4/3.
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