File 0011-wayland-Flip-the-damage-rectangles-in-wl_surface_dam.patch of Package libnvidia-egl-wayland2

From 4b95dc9879a812a812f1e77d31f63220e378b5a7 Mon Sep 17 00:00:00 2001
From: Kyle Brenneman <kbrenneman@nvidia.com>
Date: Fri, 7 Nov 2025 11:47:29 -0700
Subject: [PATCH 11/18] wayland: Flip the damage rectangles in
 wl_surface_damage_buffer

Flip the Y coordinate for the damage rectangles.

eglSwapBuffersWithDamage takes the bottom-left coordiante for each
rectangle, but wl_surface::damage_buffer takes the top-left coordinate.
---
 src/wayland/wayland-surface.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/wayland/wayland-surface.c b/src/wayland/wayland-surface.c
index 97185e2..d854f45 100644
--- a/src/wayland/wayland-surface.c
+++ b/src/wayland/wayland-surface.c
@@ -1357,8 +1357,11 @@ EGLBoolean eplWlSwapBuffers(EplPlatformData *plat, EplDisplay *pdpy,
         for (i=0; i<n_rects; i++)
         {
             const EGLint *rect = rects + (i * 4);
+            // Coordinate systems are flipped between eglSwapBuffersWithDamage
+            // and wl_surface_damage_buffer, so invert Y values.
+            int inv_y = psurf->priv->current.swapchain->height - (rect[1] + rect[3]);
             wl_surface_damage_buffer(psurf->priv->current.wsurf,
-                    rect[0], rect[1], rect[2], rect[3]);
+                    rect[0], inv_y, rect[2], rect[3]);
         }
     }
     else
-- 
2.51.0