[cairo] rotated characters does not keep baseline
behdad at behdad.org
Wed Apr 4 11:18:46 PDT 2007
On Wed, 2007-04-04 at 12:47 -0400, Jan Slupski wrote:
> Hi list,
> Since 1.4 rush seems to slow down, I would like to bring back
> a few issues reported before 1.4.0.
> 2. I'm trying to force metrics hinting to be OFF for rotated text
> (correct me, but I think that should be default?), but it seems
> that some kind of hinting is still applied (or maybe that's some
> cache effect?)
This bug was fixed in 1.4.2
> On attached picture you can see that letters are not layed out
> on the same baseline.
> Also, looking closely (zoom x8) I noticed that shapes of all
> same letters looks identically (although they are not necessairly
> on the same basline - compare 'l' in "display" and 'l' in "angle").
> The same string with the same font at the same angle look way better
> at bare FreeType.
> ftstring -m "Hello this is long text to be display at some angle" 10 times.ttf
> and rotate with right cursor until 45 degrees.
> My configuration:
> Cairo version: 1.3.14
> Tested with cairo 1.4.2
> Use test string "iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii" to easily see the problem.
> During some (unrelated directly) discussions on the list I have learned that
> the effect can be due to glyph cache, that stores only single image of a letter
> that is later reused. This seems to be wrong in any (metrics-)unhinted mode
> (rotated or not).
True. We don't have a plan to fix it right now. Any ideas?
> _ _ _ _ _____________________________________________
> | |_| |\ | S L U P S K I jslupski at juljas.net
> |_| | | | \| http://juljas.net/
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