[nanogui] XOR not working for strings in FLTK

[Martin Kajdas]

I updated my app (which used to work) to latest 0.92 nano-X (Nov. 2010)
from 2 year old 0.91+some updates and couple of problems came up, this
being one.

I am using FLTK 1.1.10, libnx 0.46 (Nov. 2010) on an embedded 16 bit
framebuffer PC based system.

The code:

    

    XSetFunction(fl_display, fl_gc, GXxor);

    XSetForeground(fl_display, fl_gc, 0xffffffff);

 

    // works

    fl_line(cur, cy, cur, cyh);

    

    // does not work

    fl_font(font, size);

    fl_draw(str, x, y);

    

    XSetFunction(fl_display, fl_gc, GXcopy);

 

The line drawing works (XORes) but string printing does not XOR, just
copies.

I updated drivers/fblin16.c with latest from Git as much as possible but
still no fix.

Which file should I look at now since something must have changed since
0.91+

Martin