> So what is the difference between d3d and DirectDraw ?
D3D uses your GPU made after 2001 as a GPU made after 2001: triangles, shaders, GPU compute processing, all that good stuff. The degree to which MAME actually leverages all that stuff is pretty minimal unless you enable HLSL, but the possibilities are there.
DirectDraw is strictly a 2D affair, and has been deprecated for several years in favor of the more aptly-named Direct2D.
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