bug#11070: 24.0.94; Large stippled images not displayed consistently

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> How messy and how ugly?  Can you tell more?  (I have no access to a
> system where this feature is supported.)

Here's a small buffer before eval-ing the stipple form:

Then afterwards; everything looks, er nice:

Then I scrolled down and up, and you can see some glitches at the top:

And then I scrolled around some more and the glitches start to accumulate:

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