https://bugs.winehq.org/show_bug.cgi?id=41930
nate nathannichols454@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |nathannichols454@gmail.com
--- Comment #21 from nate nathannichols454@gmail.com --- (In reply to cyberbaud from comment #20)
Undoing the patch to gdi32.dll mentioned in the initial report fixes the issue.
patch can be seen at https://marc.info/?l=wine-cvs&m=142496389504205&w=2
Looking at the patch, it essentially adds a if statement
if (pixel_formats[context->format - 1].mesa == OSMESA_RGB_565) type = GL_UNSIGNED_SHORT_5_6_5; else type = GL_UNSIGNED_BYTE;I don't know what the original intend of that change was, but it is responsible for the black terrain issue in civ3.
A quick fix without re-compiling wine is to turn this if statement in wine's gdi32.dll.so into a no-op using a hex editor (hexedit):
search for the 3rd instance of 0x6383 in gdi32.dll and change it to 0x0114 and the black terrain issue is gone.
I think it's actually the 2nd instance