I imagine the TMS34010 could have handled all of that, to beyond the standards of an ‘80s GUI; it is a combination CPU and GPU for the mainstream consumer market first released in 1986.

It and its descendants are known for powering pioneering arcade games such as Hard Drivin’ and Mortal Kombat, but it was also available as a putative video card standard for PCs as the TIGA; in that form it was used as a CAD and Windows accelerator, though Window of the era offloaded only the GDI functions, i.e. the pixel manipulations and plotting but not the total layout and window-level logic.

I imagine the TMS34010 could have handled all of that, to beyond the standards of an ‘80s GUI; it is a combination CPU and GPU for the mainstream consumer market first released in 1986.

It and its descendants are known for powering pioneering arcade games such as Hard Drivin’ and Mortal Kombat, but it was also available as a putative video card standard for PCs as the TIGA; in that form, it was used as a CAD and Windows accelerator, though Windows versions of the era offloaded only the GDI functions (i.e., the pixel manipulations and plotting, but not the total layout and window-level logic).