Add ImFont helper methods to get ImVec2 values

imgui-binding/src/main/java/imgui/ImFont.java

@@ -97,6 +97,20 @@ public final class ImFont implements ImGuiDestroyableStruct {
         Jni::ImVec2Cpy(env, &IM_FONT->DisplayOffset, dstImVec2);
     */
 
+    /**
+     * Offset font rendering by xx pixels
+     */
+    public native float getDisplayOffsetX(); /*
+        return IM_FONT->DisplayOffset.x;
+    */
+
+    /**
+     * Offset font rendering by xx pixels
+     */
+    public native float getDisplayOffsetY(); /*
+        return IM_FONT->DisplayOffset.y;
+    */
+
     /**
      * Offset font rendering by xx pixels
      */