TS-DDRAW switch to GDI renderer when Windows XP compatibility mode on

[everything411]

when ts-ddraw switch to gdi, it might be the game is running in windows XP compatibility mode on windows 7/10 instead of running on an old computer.
The gdi renderer's fps is limited to 30, although the computer is fast enough for 60fps in GDI mode.
So if it is possible to distinguish these two situations and set different FPS, or just add some warning texts saying that the user should disable the compatibility mode for better performance?

ts-ddraw/src/render.c

Line 452 in 5c1394b

char *warningText = "-WARNING- Using slow software rendering, please update your graphics card driver";

ts-ddraw/src/render.c

Line 464 in 5c1394b

// Let's assume the worst here: this must be an old computer