From 3cbbe7be2cced7aec9c79e81d6259adaa9772208 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Tue, 7 Feb 2023 15:26:46 +0100
Subject: Remove XOR-based code that was unused and incomplete (#673)

---
 src/fl_overlay.cxx | 40 +---------------------------------------
 1 file changed, 1 insertion(+), 39 deletions(-)

diff --git a/src/fl_overlay.cxx b/src/fl_overlay.cxx
index a4bacb493..2d770d8d0 100644
--- a/src/fl_overlay.cxx
+++ b/src/fl_overlay.cxx
@@ -1,7 +1,7 @@
 //
 // Overlay support for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 1998-2021 by Bill Spitzak and others.
+// Copyright 1998-2023 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
@@ -23,45 +23,16 @@
 #include <FL/platform.H>
 #include <FL/fl_draw.H>
 
-//#define USE_XOR
-// unless USE_XOR is defined, this source file is cross-platform
-
-#ifdef USE_XOR
-#include <config.h>
-#endif
-
 static int px,py,pw,ph;
 
-#ifndef USE_XOR
 #include <stdlib.h>
 #include "Fl_Screen_Driver.H"
 #include <FL/Fl_RGB_Image.H>
 static Fl_RGB_Image *s_bgN = 0, *s_bgS = 0, *s_bgE = 0, *s_bgW = 0;
 
 static int bgx, bgy, bgw, bgh;
-#endif
 
 static void draw_current_rect() {
-#ifdef USE_XOR
-# if defined(FLTK_USE_X11)
-  GC gc = (GC)fl_graphics_driver->gc();
-  XSetFunction(fl_display, gc, GXxor);
-  XSetForeground(fl_display, gc, 0xffffffff);
-  XDrawRectangle(fl_display, fl_window, gc, px, py, pw, ph);
-  XSetFunction(fl_display, gc, GXcopy);
-# elif defined(_WIN32)
-  int old = SetROP2(fl_graphics_driver->gc(), R2_NOT);
-  fl_rect(px, py, pw, ph);
-  SetROP2(fl_graphics_driver->gc(), old);
-# elif defined(__APPLE__)
-  // warning: Quartz does not support xor drawing
-  // Use the Fl_Overlay_Window instead.
-  fl_color(FL_WHITE);
-  fl_rect(px, py, pw, ph);
-# else
-#  error unsupported platform
-# endif
-#else
   if (s_bgN) { delete s_bgN; s_bgN = 0; }
   if (s_bgS) { delete s_bgS; s_bgS = 0; }
   if (s_bgE) { delete s_bgE; s_bgE = 0; }
@@ -94,22 +65,13 @@ static void draw_current_rect() {
   fl_line_style(FL_DOT);
   fl_graphics_driver->overlay_rect(px, py, pw, ph);
   fl_line_style(FL_SOLID);
-#endif // USE_XOR
 }
 
 static void erase_current_rect() {
-#ifdef USE_XOR
-# ifdef __APPLE__ // PORTME: Fl_Window_Driver - platform overlay
-  fl_rect(px, py, pw, ph);
-# else
-  draw_current_rect();
-# endif
-#else
   if (s_bgN) s_bgN->draw(bgx, bgy);
   if (s_bgS) s_bgS->draw(bgx, (bgy+bgh-1));
   if (s_bgW) s_bgW->draw(bgx, bgy);
   if (s_bgE) s_bgE->draw((bgx+bgw-1), bgy);
-#endif
 }
 
 /**
-- 
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