https://bugs.winehq.org/show_bug.cgi?id=45747
--- Comment #3 from Henri Verbeet hverbeet@gmail.com --- (In reply to Andrew Wesie from comment #2)
fbo_blitter_supported was returning FALSE because only the source texture has the depth and stencil flags. Both textures have format id WINED3DFMT_R24G8_TYPELESS.
Ah, makes sense.