Problem with refresh PDFKit full screen

I do a lot of presentations in PDF format (they are usually created with LaTeX, but I as explained below, this detail has nothing to do with the problem).

Very often a slide appears in increments - think of several chips which are revealed one by one.

What is really happening, is that each step is a separate page, but the user should not notice it.

So if you have a bulleted list

•A

•B

•THIS

There are really three separate pages (one that contains just A, an and B and a with A, B, C).

When you advance to the next overlay, it seems that a and B has been added to the screen, and then a C (even if every time an entire page is replaced by the next).

In the Sierra this screen refresh is not smooth and the public can clearly see the screen "shaking."

I tested it on two machines. I did a test of the Keynote presentation, which looks great; and then did the same with the PDF version and it is fragile. It was regardless of what program I used to view (Preview, Skim, TeXShop), which indicates that the problem is in the common framework, they use all - PDFKit.

I already submitted comments to Apple, but I'd like to hear if people also see this; just to make sure that it is not something weird on my machines.

Yes, I confirm this. It seems that PDFKit "re-focuces" fonts whenever we turn the page. While this might be great for static pages (best font anti-aliasing) is certainly a problem for presentations: you can clearly see the fonts from blurry to sharp in the slides with incremental changes. That's all just awful. On the other hand, PDFKit is not smooth images embedded in pdf files in the Sierra at all: those with straight lines will look on-screen civet. Once again, all just awful. Bad bad, Apple!

Tags: Mac OS & System Software

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