Terminal renders gaps in between some lines

[ocalvo]

Environment

Windows 10 19H1

Windows build number: 10.0.18362.175
Windows Terminal version (if applicable):

Any other software?
[ZtreeWin](http://www.ztree.com/html/ztreewin.htm)

Steps to reproduce

1 - Install ZtreeWin, or PowerShell PowerTab
2 - Make Terminal Window large
3 - Execute ztw or [TAB] in PowerShell with PowerTab enabled

Expected behavior

Actual behavior

There are multiple horizontal lines that should not be there.

[miniksa]

This is sort of like #404, but my psychic debugging says this is floating point measuring of lines going awry and it might be really smart to just wholesale move to GDI measuring like #1298 suggested.

[ocalvo]

I think there are 2 issues here, one that is dependent on DPI.

For example ZTW at 200 DPI shows like these:

• Notice the horizontal lines
• Notice the vertical lines are not continuous

For ZTW at 100 DPI:

• Notice that the horizontal lines are fixed.
• But the vertical lines are still not continuous.

Baseline:

[thomaslevesque]

I see the same thing with display scaling at 125% or 150%. Works fine at 100%.
Particularly annoying when using oh-my-posh, or anything that relies on fonts with Powerline glyphs

[wmcbrine]

Vertical gaps also sometimes occur. I am using 125% scaling.

[DHowett-MSFT]

/dup #3626

[ghost]

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!