cut the GPU load of moving the mouse over the 3D viewport (#15674)

Co-authored-by: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>

src/libslic3r/AppConfig.cpp

@@ -283,6 +283,12 @@ void AppConfig::set_defaults()
         set(SETTING_OPENGL_FPS_CAP, std::to_string(fps_cap));
     }
 
+    if (get(SETTING_OPENGL_SCENE_CACHE).empty())
+        set_bool(SETTING_OPENGL_SCENE_CACHE, true);
+
+    if (get(SETTING_OPENGL_SKIP_IDENTICAL_FRAMES).empty())
+        set_bool(SETTING_OPENGL_SKIP_IDENTICAL_FRAMES, true);
+
     // The getter already defaults, parses and clamps; write back what it resolves to.
     set(SETTING_PLUGIN_PAGES_VISIBLE_COUNT, std::to_string(get_plugin_pages_visible_count()));
 

src/libslic3r/AppConfig.hpp

@@ -33,6 +33,8 @@ using namespace nlohmann;
 #define SETTING_OPENGL_AA_SAMPLES "opengl_antialiasing_samples"
 #define SETTING_OPENGL_FXAA_ENABLED "opengl_fxaa_enabled"
 #define SETTING_OPENGL_FPS_CAP "opengl_fps_cap"
+#define SETTING_OPENGL_SCENE_CACHE "opengl_scene_cache"
+#define SETTING_OPENGL_SKIP_IDENTICAL_FRAMES "opengl_skip_identical_frames"
 #define SETTING_OPENGL_SHOW_FPS_OVERLAY "opengl_show_fps_overlay"
 #define SETTING_OPENGL_REALISTIC_MODE "opengl_realistic_mode"
 #define SETTING_OPENGL_REALISTIC_PHONG "opengl_realistic_phong"