Merge pull request #8050 from FoamyGuy/hidden_refresh_areas

don't consider refresh areas for hidden groups or tilegrids

Author: tannewt

shared-module/displayio/Group.c

@@ -456,7 +456,9 @@ displayio_area_t *displayio_group_get_refresh_areas(displayio_group_t *self, dis
         layer = mp_obj_cast_to_native_base(
             self->members->items[i], &displayio_tilegrid_type);
         if (layer != MP_OBJ_NULL) {
-            tail = displayio_tilegrid_get_refresh_areas(layer, tail);
+            if (!displayio_tilegrid_get_rendered_hidden(layer)) {
+                tail = displayio_tilegrid_get_refresh_areas(layer, tail);
+            }
             continue;
         }
         layer = mp_obj_cast_to_native_base(

shared-module/displayio/TileGrid.c

@@ -82,15 +82,21 @@ bool common_hal_displayio_tilegrid_get_hidden(displayio_tilegrid_t *self) {
     return self->hidden;
 }
 
+bool displayio_tilegrid_get_rendered_hidden(displayio_tilegrid_t *self) {
+    return self->rendered_hidden;
+}
+
 void common_hal_displayio_tilegrid_set_hidden(displayio_tilegrid_t *self, bool hidden) {
     self->hidden = hidden;
+    self->rendered_hidden = false;
     if (!hidden) {
         self->full_change = true;
     }
 }
 
 void displayio_tilegrid_set_hidden_by_parent(displayio_tilegrid_t *self, bool hidden) {
     self->hidden_by_parent = hidden;
+    self->rendered_hidden = false;
     if (!hidden) {
         self->full_change = true;
     }
@@ -582,6 +588,7 @@ displayio_area_t *displayio_tilegrid_get_refresh_areas(displayio_tilegrid_t *sel
     bool hidden = self->hidden || self->hidden_by_parent;
     // Check hidden first because it trumps all other changes.
     if (hidden) {
+        self->rendered_hidden = true;
         if (!first_draw) {
             self->previous_area.next = tail;
             return &self->previous_area;

shared-module/displayio/TileGrid.h

@@ -66,6 +66,7 @@ typedef struct {
     bool transpose_xy  : 1;
     bool hidden : 1;
     bool hidden_by_parent : 1;
+    bool rendered_hidden : 1;
     uint8_t padding : 6;
 } displayio_tilegrid_t;
 
@@ -86,4 +87,6 @@ void displayio_tilegrid_update_transform(displayio_tilegrid_t *group, const disp
 bool displayio_tilegrid_get_previous_area(displayio_tilegrid_t *self, displayio_area_t *area);
 void displayio_tilegrid_finish_refresh(displayio_tilegrid_t *self);
 
+bool displayio_tilegrid_get_rendered_hidden(displayio_tilegrid_t *self);
+
 #endif // MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_TILEGRID_H