While I am sure William is not terribly interested in competing projects, I thought I would login to provide this useful information to people who would rather wrap to modern Direct3D instead of OpenGL. For William's purposes, its documentation makes interesting reading.
dgVoodoo, by Dege, is traditionally a closed-source 3dfx Glide wrapper for Windows.
dgVoodoo 1.x wrapped 3dfx Glide 2.1x and Glide 2.4x to Direct3D 7, later adding the option of wrapping to Direct3D 9.
dgVoodoo 1.x also included a VESA simulator of some kind.
http://dege.freeweb.hu/
Dege stopped development around September 2010 with no new releases since June 2007. However, last year he made it go open source under LGPL 2.1.
http://www.vogonsdrivers.com/getfile.php?fileid=496
Since January 2013 Dege has been working on dgVoodoo 2.x (still closed-source), which wraps 3dfx Glide 2.1x, Glide 2.4x and Glide 3.x to Direct3D 11 (requiring Direct3D 10.1 hardware)
http://dege.freeweb.hu/
Well, the relevant news is: First version of DirectX 5, 6 and 7 support is added. So it now also wraps DirectDraw and Direct3D 5/6/7 to Direct3D 11, with plans for even more version support.
dgVoodoo v2.4 (released: 11.23.2014)
http://dege.freeweb.hu/
The included documentation in ReadmeDirextX.txt is rather interesting.
We have a discussion topic for it going here at VOGONS:
http://www.vogons.org/viewtopic.php?f=9&t=34931
and one mentioning the new feature here:
http://www.vogons.org/viewtopic.php?f=24&t=41544
And one here for DXGL at VOGONS:
http://www.vogons.org/viewtopic.php?f=24&t=33134
Sorry for the off-topic communication, William!