Wayland: Fix missing damage event on window show

By definition a hidden window on Wayland does not have valid framebuffer contents. This adds a window damage (refresh) event when a window is shown, to request an initial frame for the now visible window.
TheCherno · Dec 31, 2021 · 25c521c · 25c521c
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diff --git a/README.md b/README.md
@@ -284,6 +284,7 @@ information on what to include when reporting a bug.
  - [Wayland] Bugfix: Disable key repeat mechanism when window loses input focus
  - [Wayland] Bugfix: Window hiding and showing did not work (#1492,#1731)
  - [Wayland] Bugfix: A key being repeated was not released when window lost focus
+ - [Wayland] Bugfix: Showing a hidden window did not emit a window refresh event
  - [POSIX] Removed use of deprecated function `gettimeofday`
  - [POSIX] Bugfix: `CLOCK_MONOTONIC` was not correctly tested for or enabled
  - [WGL] Disabled the DWM swap interval hack for Windows 8 and later (#1072)

diff --git a/src/wl_window.c b/src/wl_window.c
@@ -1006,6 +1006,7 @@ void _glfwShowWindowWayland(_GLFWwindow* window)
             createXdgSurface(window);
 
         window->wl.visible = GLFW_TRUE;
+        _glfwInputWindowDamage(window);
     }
 }