Re: PNG vs. sub-pixel rendering PARTIAL SOLUTION!

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On Thu, 9 Jul 2026 at 21:34, Jim Diamond via ntg-context <[email protected]>
wrote:

> Hi Hans and other interested parties,
>
> On Thu, Jul  9, 2026 at 09:31 (+0200), Hans Hagen via ntg-context wrote:
>
> > On 7/9/2026 3:05 AM, Jim Diamond via ntg-context wrote:
>
> >> One day I was wondering why a typeface looked so bad (when reading on my
> >> laptop screen using Adobe reader), and I realized that sub-pixel
> rendering
> >> was not working.  At first I thought it was the typeface itself.
>


> Bingo!  (PARTIAL SOLUTION!) For whatever reason that PNG has an alpha
> channel.  I used imagemagick to write out a new PNG, and when I use that
> instead the SPR problem goes away.
>

I have tried your pdf with Adobe Reader on my  Android smartphone, they
look ok .

--
luigi

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote g=
mail_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, 9 Jul 2=
026 at 21:34, Jim Diamond via ntg-context &lt;<a href=3D"mailto:ntg-context=
@ntg.nl">[email protected]</a>&gt; wrote:<br></div><blockquote class=3D"gm=
ail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,=
204,204);padding-left:1ex">Hi Hans and other interested parties,<br>
<br>
On Thu, Jul=C2=A0 9, 2026 at 09:31 (+0200), Hans Hagen via ntg-context wrot=
e:<br>
<br>
&gt; On 7/9/2026 3:05 AM, Jim Diamond via ntg-context wrote:<br>
<br>
&gt;&gt; One day I was wondering why a typeface looked so bad (when reading=
 on my<br>
&gt;&gt; laptop screen using Adobe reader), and I realized that sub-pixel r=
endering<br>
&gt;&gt; was not working.=C2=A0 At first I thought it was the typeface itse=
lf.<br></blockquote><div>=C2=A0</div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex">Bingo!=C2=A0 (PARTIAL SOLUTION!) For whatever reason that PNG h=
as an alpha<br>
channel.=C2=A0 I used imagemagick to write out a new PNG, and when I use th=
at<br>
instead the SPR problem goes away.<br></blockquote><div><br></div><div>I ha=
ve tried your pdf with Adobe Reader on my=C2=A0 Android smartphone, they lo=
ok=C2=A0ok .</div><div><br></div><div>--</div><div>luigi</div></div></div>

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