[Bug 39051] TabbedTextOut() incorrect output on tab character

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=39051

--- Comment #3 from Eric Mullins <wine at goabq.org> ---
Further experimentation reveals that it's not so much 1 at a time, as the text
containing ONLY tab chars.  ie: "\t\t\t " will work as expected in a single
TabbedTextOut() call because of the inclusion of a space.  But "\t\t\t" will
exhibit the problematic behavior because it only contains tabs.

Possibly this was an "optimization" in the original code, thinking that a call
that contains only tabs need not output anything, only update the delta x as if
it were a GetTabbedTextExtent() call.  That would explain the fact that the
errant output mimics the previoius line-- nothing gets output, so it's still in
the bitmap.

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