Wayland: Ensure that glfw window content scale and kitty window content scale are in sync after the window is placed on a monitor

docs/changelog.rst

@@ -43,6 +43,9 @@ To update |kitty|, :doc:`follow the instructions <binary>`.
 - Fix a regression in 0.14.5 that caused rendering of private use glyphs
   with and without spaces to be identical (:iss:`2117`)
 
+- Wayland: Fix incorrect scale used when first creating an OS window
+  (:iss:`2133`)
+
 
 0.14.6 [2019-09-25]
 ---------------------

glfw/wl_platform.h

@@ -156,6 +156,7 @@ typedef struct _GLFWwindowWayland
     // We need to track the monitors the window spans on to calculate the
     // optimal scaling factor.
     int                         scale;
+    bool                        initial_scale_notified;
     _GLFWmonitor**              monitors;
     int                         monitorsCount;
     int                         monitorsSize;

glfw/wl_window.c

@@ -75,6 +75,10 @@ static bool checkScaleChange(_GLFWwindow* window)
         wl_surface_set_buffer_scale(window->wl.surface, scale);
         return true;
     }
+    if (window->wl.monitorsCount > 0 && !window->wl.initial_scale_notified) {
+        window->wl.initial_scale_notified = true;
+        return true;
+    }
     return false;
 }