From eb21fc3e31790cee094d5c11811b55a57625340a Mon Sep 17 00:00:00 2001 From: Scott Shawcroft Date: Thu, 6 Jun 2019 15:11:02 -0700 Subject: Add partial display update support. Different operations to the display tree have different costs. Be aware of these costs when optimizing your code. * Changing tiles indices in a TileGrid will update an area covering them all. * Changing a palette will refresh every object that references it. * Moving a TileGrid will update both where it was and where it moved to. * Adding something to a Group will refresh each individual area it covers. * Removing things from a Group will refresh one area that covers all previous locations. (Not separate areas like add.) * Setting a new top level Group will refresh the entire display. Only TileGrid moves are optimized for overlap. All other overlaps cause sending of duplicate pixels. This also adds flip_x, flip_y and transpose_xy to TileGrid. They change the direction of the pixels but not the location. Fixes #1169. Fixes #1705. Fixes #1923. --- shared-module/displayio/area.h | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) (limited to 'shared-module/displayio/area.h') diff --git a/shared-module/displayio/area.h b/shared-module/displayio/area.h index 9db57e13f..ec7c389b4 100644 --- a/shared-module/displayio/area.h +++ b/shared-module/displayio/area.h @@ -28,23 +28,35 @@ #define MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_AREA_H // Implementations are in __init__.c +typedef struct _displayio_area_t displayio_area_t; -typedef struct { +struct _displayio_area_t { int16_t x1; int16_t y1; int16_t x2; // Second point is exclusive. int16_t y2; -} displayio_area_t; + const displayio_area_t* next; // Next area in the linked list. +}; typedef struct { + uint16_t x; + uint16_t y; + int8_t dx; + int8_t dy; + uint8_t scale; uint16_t width; uint16_t height; - uint8_t scale; bool mirror_x; bool mirror_y; bool transpose_xy; } displayio_buffer_transform_t; +void displayio_area_union(const displayio_area_t* a, + const displayio_area_t* b, + displayio_area_t* u); +void displayio_area_expand(displayio_area_t* original, const displayio_area_t* addition); +void displayio_area_copy(const displayio_area_t* src, displayio_area_t* dst); +void displayio_area_scale(displayio_area_t* area, uint16_t scale); void displayio_area_shift(displayio_area_t* area, int16_t dx, int16_t dy); bool displayio_area_compute_overlap(const displayio_area_t* a, const displayio_area_t* b, @@ -53,5 +65,9 @@ uint16_t displayio_area_width(const displayio_area_t* area); uint16_t displayio_area_height(const displayio_area_t* area); uint32_t displayio_area_size(const displayio_area_t* area); bool displayio_area_equal(const displayio_area_t* a, const displayio_area_t* b); +void displayio_area_transform_within(bool mirror_x, bool mirror_y, bool transpose_xy, + const displayio_area_t* original, + const displayio_area_t* whole, + displayio_area_t* transformed); #endif // MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_AREA_H -- cgit v1.2.3