From 008d71f5b7c121335bc2de620cf7cddfaa0f8d70 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Mon, 26 Aug 2024 22:55:59 +0200
Subject: [PATCH] Fix for artefact in X11 1-pixel thick rect drawing with some
 drivers (#156, #1052)

---
 src/drivers/Xlib/Fl_Xlib_Graphics_Driver_rect.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_rect.cxx b/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_rect.cxx
index 689f0eccf..25cb6a285 100644
--- a/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_rect.cxx
+++ b/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_rect.cxx
@@ -228,7 +228,10 @@ void Fl_Xlib_Graphics_Driver::focus_rect(int x, int y, int w, int h) {
 }
 
 void Fl_Xlib_Graphics_Driver::rect_unscaled(int x, int y, int w, int h) {
+  void *old = NULL;
+  if (line_width_ == 0) old = change_pen_width(1); // #156, #1052
   XDrawRectangle(fl_display, fl_window, gc_, x, y, w, h);
+  if (old) reset_pen_width(old);
 }
 
 void Fl_Xlib_Graphics_Driver::rectf_unscaled(int x, int y, int w, int h) {