looking into how null show works

Author: FoamyGuy

shared-module/displayio/Display.c

@@ -136,11 +136,28 @@ void common_hal_displayio_display_construct(displayio_display_obj_t *self,
 
     // Set the group after initialization otherwise we may send pixels while we delay in
     // initialization.
+    mp_printf(&mp_plat_print, "Inside display make_new\n");
+    is_null(&circuitpython_splash);
+    //is_null(0);
+//    if(circuitpython_splash == mp_const_none) {
+//        mp_printf(&mp_plat_print, "Splash is NULL \n");
+//    }
+//    mp_printf(&mp_plat_print,  *circuitpython_splash);
+//    mp_printf(&mp_plat_print,  "\n");
     common_hal_displayio_display_show(self, &circuitpython_splash);
     common_hal_displayio_display_set_auto_refresh(self, auto_refresh);
 }
 
+void is_null(displayio_group_t *root_group){
+    if (root_group == NULL){
+        mp_printf(&mp_plat_print,  "root_group is null\n");
+    }
+}
+
 bool common_hal_displayio_display_show(displayio_display_obj_t *self, displayio_group_t *root_group) {
+    if(root_group == NULL){
+        mp_printf(&mp_plat_print,  "Its NULL fer flucks snakes\n");
+    }
     return displayio_display_core_set_root_group(&self->core, root_group);
 }
 

shared-module/displayio/Display.h

@@ -64,7 +64,7 @@ typedef struct {
 void displayio_display_background(displayio_display_obj_t *self);
 void release_display(displayio_display_obj_t *self);
 void reset_display(displayio_display_obj_t *self);
-
+void is_null(displayio_group_t *root_group);
 void displayio_display_collect_ptrs(displayio_display_obj_t *self);
 
 #endif // MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_DISPLAY_H

shared-module/displayio/display_core.c

@@ -169,7 +169,7 @@ bool displayio_display_core_set_root_group(displayio_display_core_t *self, displ
         // force the circuit_python_splash out of any group (Note: could cause problems with the parent group)
         circuitpython_splash.x = 0; // reset position in case someone moved it.
         circuitpython_splash.y = 0;
-
+        mp_printf(&mp_plat_print, "Inside set root group NULL\n");
         supervisor_start_terminal(self->width, self->height);
 
         root_group = &circuitpython_splash;