XSetFont

int XSetFont(Display *display, GC gc, Font font);

display

Specifies the connection to the X server.

font

Specifies the font.

gc

Specifies the GC.

The XSetFont function sets the current font in the specified GC.

XSetFont can generate BadAlloc, BadFont, and BadGC errors.

BadAlloc

The server failed to allocate the requested resource or server memory.

BadFont

A value for a Font or GContext argument does not name a defined Font.

BadGC

A value for a GContext argument does not name a defined GContext.

XCreateGC(3), XQueryBestSize(3), XSetArcMode(3), XSetClipOrigin(3), XSetFillStyle(3), XSetLineAttributes(3), XSetState(3), XSetTile(3)
Xlib - C Language X Interface