Support for switching platforms (from Wayland EGL to X11 GLX)

jme3-core/src/main/java/com/jme3/system/AppSettings.java

@@ -295,6 +295,7 @@ public final class AppSettings extends HashMap<String, Object> {
         defaults.put("UseRetinaFrameBuffer", false);
         defaults.put("WindowYPosition", 0);
         defaults.put("WindowXPosition", 0);
+        defaults.put("X11PlatformPreferred", false);
         //  defaults.put("Icons", null);
     }
 
@@ -1507,4 +1508,36 @@ public int getDisplay() {
     public void setDisplay(int mon) {
         putInteger("Display", mon);
     }
+
+    /**
+     * Sets the native platform to be used to create the GL context.
+     * 
+     * <p>
+     * This only affects Linux distributions or derivatives that use a Wayland session in conjunction 
+     * with X11 via the XWayland bridge, which enables or disables GLX for window positioning and/or 
+     * icon configuration.
+     * </p>
+     *
+     * <p>
+     * <strong>NOTE:</strong> Note that disabling this option uses GLX (native X11) instead of EGL (native WL).
+     * </p>
+     * 
+     * @param nplaf true if you want to enable GLX, otherwise false when using EGL (native)
+     */
+    public void setX11PlatformPreferred(boolean nplaf) {
+        put("X11PlatformPreferred", nplaf);
+    }
+
+    /**
+     * Gets what type of platform is being used.
+     * 
+     * <p>
+     * Only valid on Linux distributions or derivatives that support Wayland, where it indicates whether GLX or EGL is enabled.
+     * </p>
+     * 
+     * @return returns true if GLX is enabled, otherwise false if used in EGL (native)
+     */
+    public boolean isX11PlatformPreferred() {
+        return getBoolean("X11PlatformPreferred");
+    }
 }

jme3-lwjgl3/src/main/java/com/jme3/system/lwjgl/LwjglWindow.java

@@ -275,12 +275,20 @@ public void invoke(int error, long description) {
         );
 
         if (glfwPlatformSupported(GLFW_PLATFORM_WAYLAND)) {
-
+
+            /*
+             * Change the platform GLFW uses to enable GLX on Wayland as long as you 
+             * have XWayland (X11 compatibility)
+             */
+            if (settings.isX11PlatformPreferred() && glfwPlatformSupported(GLFW_PLATFORM_X11)) {
+                glfwInitHint(GLFW_PLATFORM, GLFW_PLATFORM_X11);
+            }
+
             // Disables the libdecor bar when creating a fullscreen context
             // https://www.glfw.org/docs/latest/intro_guide.html#init_hints_wayland
             glfwInitHint(GLFW_WAYLAND_LIBDECOR, settings.isFullscreen() ? GLFW_WAYLAND_DISABLE_LIBDECOR : GLFW_WAYLAND_PREFER_LIBDECOR);
         }
-        
+
         if (!glfwInit()) {
             throw new IllegalStateException("Unable to initialize GLFW");
         }