Rework the pixel computation to use areas

This changes the displayio pixel computation from per-pixel to
per-area. This is precursor work to updating portions of the screen
(#1169). It should provide mild speedups because bounds checks are
done once per area rather than once per pixel. Filling by area also
allows TileGrid to maintain a row-associative fill pattern even when
the display's refresh is orthogonal to it.

1 files changed, 2 insertions, 1 deletions

diff --git a/shared-module/displayio/Group.h b/shared-module/displayio/Group.h
index 7826b9e66..f8fe9be04 100644
--- a/shared-module/displayio/Group.h
+++ b/shared-module/displayio/Group.h
@@ -31,6 +31,7 @@
 #include <stdint.h>
 
 #include "py/obj.h"
+#include "shared-module/displayio/area.h"
 
 typedef struct {
     mp_obj_t native;
@@ -49,7 +50,7 @@ typedef struct {
 } displayio_group_t;
 
 void displayio_group_construct(displayio_group_t* self, displayio_group_child_t* child_array, uint32_t max_size, uint32_t scale, mp_int_t x, mp_int_t y);
-bool displayio_group_get_pixel(displayio_group_t *group, int16_t x, int16_t y, uint16_t *pixel);
+bool displayio_group_get_area(displayio_group_t *group, displayio_buffer_transform_t* transform, displayio_area_t* area, uint32_t* mask, uint32_t *buffer);
 bool displayio_group_needs_refresh(displayio_group_t *self);
 void displayio_group_finish_refresh(displayio_group_t *self);