From a5e8fbcca05aa938264779a18424210939844b20 Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Tue, 24 Oct 2023 23:09:09 +0200
Subject:  Fix "Wayland: Overlay windows look blurred" (#808)

---
 src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
index e844dbb90..da73319d8 100644
--- a/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Window_Driver.cxx
@@ -194,7 +194,11 @@ void Fl_Wayland_Window_Driver::flush_overlay()
   }
   if (erase_overlay) fl_clip_region(0);
   if (other_xid) {
-    fl_copy_offscreen(0, 0, oWindow->w(), oWindow->h(), other_xid->offscreen(), 0, 0);
+    struct Fl_Wayland_Graphics_Driver::draw_buffer *buffer =
+      Fl_Wayland_Graphics_Driver::offscreen_buffer(other_xid->offscreen());
+    struct wld_window *xid = fl_wl_xid(pWindow);
+    struct Fl_Wayland_Graphics_Driver::wld_buffer *wbuffer = xid->buffer;
+    memcpy(wbuffer->draw_buffer.buffer, buffer->buffer, wbuffer->draw_buffer.data_size);
   }
   if (overlay() == oWindow) oWindow->draw_overlay();
 }
-- 
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