[Bug 51743] GSView has the wrong color for some hovered menu items

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51743

--- Comment #3 from Fabian Maurer <dark.shadow4 at web.de> ---
Created attachment 70628
  --> https://bugs.winehq.org/attachment.cgi?id=70628
Test program with screenshots

Further analysis yields that the problem is due to 1bpp bitmaps. Windows
handles those different from Wine.

In short, Windows renders black in the highlight color, and white as white
(instead of transparent).
GSView additionally has some ownerdraw, where wine for some reason renders the
inverted highlight color as background. Could be multiple issues here...

Attaching a test program to easily reproduce the issue without ownerdraw. Might
take a look after I solved the 1bpp cursor issue(s)...

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