[cairo] null stream pdf surface
behdad at behdad.org
Thu Aug 26 08:36:17 PDT 2010
On 08/26/10 03:11, Dov Grobgeld wrote:
> Just to make sure, are you refering to the internal cairo text
> rendering? I guess if it was pango, then you would have said so.
Both. Any user of cairo_show_glyphs() api.
> I'm curious what is there to fix? As far as I understand the only proper
> way of doing text scaling for hinted fonts is to do it iteratively until
> you satisfy some criteria. Even then you might get stuck in the problem
> that when you increase the font size by ε your rendered text is to large
> and when you decrease the font by the same ε, then text is too small.
Correct. I'm talking about the case of metrics-hinting off though. With no
metrics hinting, you expect text to be fully linearly scalable. It currently
is not. Part of it is coming from rounding error in FreeType.
> On Thu, Aug 26, 2010 at 00:57, Behdad Esfahbod <behdad at behdad.org
> <mailto:behdad at behdad.org>> wrote:
> On 08/25/10 17:49, Arjen Nienhuis wrote:
> > You shouldn't do that. You should measure it at a nominal size,
> > scale, and
> > draw to the target. If you do that, you still find that your text
> > doesn't
> > quite fit in. That's because (unfortunately) cairo doesn't do
> > linearly
> > scalable text yet :(. What I suggest you do is to get the
> path for
> > the text
> > at the nominal size, scale, append path, fill.
> > If you draw text like that it looks a lot better. Especially if
> the text
> > is slightly rotated or skewed.
> > Why is there no setting to draw all text like that?
> Fixing the cairo text implementation to do that internally has been
> on my
> plate for way too long. Would appreciate if someone takes it over.
> > Groeten, Arjen
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