I can see this effect on my MacBook Pro with non-retina display. Comparing the
same PDF file in Preview and Skim, Preview renders a smoother output.
One more thing that I have noticed is the difference in "Actual Size" zoom
setting between Preview and Skim. Whereas Preview opens a page with the size of
actual document, pressing cmd-0 generates a page that is smaller than the
actual size of paper. Could it be related to retina vs non-retina displays?
Hooman
—
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On Tue, Oct 21, 2014 at 11:19 AM, Ivan Werning <iwern...@gmail.com> wrote:
> PS: a final appendum to my point 2b Perhaps a detail:
> I just noticed that if you have View set to Automatically Resize and you
> open a PDF file, then it first renders as in "Larger". If you then
> "jiggle" the window size, ever so slightly, it immediately switches to a
> rendering as in "Smaller". In other words, its first rendering is still as
> in the case where the window is larger than the displayed PDF.
> Please let me know if my screen shots are good enough to appreciate these
> things. I took a shot of the window, rather than a box or the screen.
> Perhaps I should have taken the entire screen to keep the shot the same
> size when I changed the window size.
> -Ivan
> On Tue, Oct 21, 2014 at 11:08 AM, Ivan Werning <iwern...@gmail.com> wrote:
>>
>>>
>>> Follow the Hidden Preferences link, then go to Image Smoothing
>>> (SKImageInterpolation).
>>>
>>> Christiaan
>>>
>>
>> I poked around. I have two things to report.
>>
>> 1. Playing around with that hidden option did not improve things. I tried
>> options 0 1 2 3 and noticed no improvement: it always rendered sub
>> optimally.
>>
>> 2. I have noticed something interesting. The rendering depends crucially
>> not just on the zoom level, but also, for a given zoom level, on whether
>> the window is sized large enough to get the background color in the window,
>> outside the PDF page I mean. that is, the grey region in Skim. In
>> particular,
>>
>> a. for a given zoom level if I resize my window the rendering suddenly
>> shifts when I go to a width that is larger than the page to one that is
>> smaller.
>> Larger:
>>
>> https://www.dropbox.com/s/a5458jwhwtn1ngu/Screenshot%202014-10-21%2010.57.39.png?dl=0
>> Smaller:
>>
>> https://www.dropbox.com/s/8hsk3xpohdx5iqi/Screenshot%202014-10-21%2010.58.07.png?dl=0
>> as you can see all I did was use my cursor to reduce the width from the
>> right side of the window. The PDF displayed page did not move nor was it
>> resized. But the rendering did change significantly.
>>
>> To be honest, both seem off to me, but the one where the window is smaller
>> than the page looks better---perhaps even how it should/used to be, I am
>> not sure really (still different than Preview). But the one where the
>> window is larger than the PDF looks really blurry (as in low contrast) and
>> blocky. Regardless, there is definitely a discrete change in the way things
>> are rendering as one moves the window size as described.
>>
>> b. The same change happens if I click on "Automatically Resize". If I know
>> change the size of the window I always get a rendering that I believe is
>> identical (or at least very similar) to the "Smaller" above.
>>
>> I hope this clue might help find where the issue is.
>>
>> -Ivan
>>
>>
>>
>>
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