From 82e0e859ee51cd37a092122524f4a89d3708162f Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Fri, 8 Nov 2024 09:14:29 +0100
Subject: Fix X11: test/checkers drawing artifacts when window is scaled
 (#1109)

---
 src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/drivers/Wayland')

diff --git a/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx
index 290cb0873..912f9675c 100644
--- a/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Graphics_Driver.cxx
@@ -149,8 +149,8 @@ static void copy_region(struct wld_window *window, cairo_region_t *r) {
     cairo_region_get_rectangle(r, i, &rect);
     int left = rect.x * f;
     int top = rect.y * f;
-    int width = rect.width * f;
-    int height = rect.height * f;
+    int width = ceil((rect.x + rect.width)*f) - left;
+    int height = ceil((rect.y + rect.height)*f) - top;
     int offset = top * buffer->draw_buffer.stride + 4 * left;
     int W4 = 4 * width;
     for (int l = 0; l < height; l++) {
-- 
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