#1517 Increase the maximum zoom level when performing SCI_ZOOMIN

[Jiri Techet]

We have this open PR in Geany asking for increasing the maximum zoom level which may be useful for people streaming something online or performing presentations:

https://github.com/geany/geany/issues/2750

This seems to be quite a popular request judging from the thumbs up reactions. Would increasing the value in Scintilla be acceptable or are there some related problems?

[Neil Hodgson]

An increase in maximum would be OK. It shouldn't be unlimited as that could lead to unexpected failures of precision. There's another hard limit at the low end of 1.0 as asking for zero may fail.

The biggest problem with zoom is that people commonly want a magnification factor which would make sense now that font sizes are floating point but wasn't as useful under old integer-based text APIs. Since current calls should remain working, that would require supporting both.

[Jiri Techet]

How about 50-60 for the max. value? It seems "reasonably" big to me (not that I plan to use it myself).

[Neil Hodgson]

Committed with [19482b].

[Jiri Techet]

Great, thanks!