Merge pull request #4 from adafruit/master

merge from adafruit

16 files changed, 756 insertions, 2 deletions

diff --git a/shared-module/board/__init__.c b/shared-module/board/__init__.c
index 789318a05..0fbf916cd 100644
--- a/shared-module/board/__init__.c
+++ b/shared-module/board/__init__.c
@@ -123,7 +123,7 @@ mp_obj_t common_hal_board_create_uart(void) {
 #endif
 
     common_hal_busio_uart_construct(self, tx, rx, rts, cts, rs485_dir, rs485_invert,
-                                    9600, 8, PARITY_NONE, 1, 1.0f, 64);
+                                    9600, 8, PARITY_NONE, 1, 1.0f, 64, NULL, false);
     MP_STATE_VM(shared_uart_bus) = MP_OBJ_FROM_PTR(self);
     return MP_STATE_VM(shared_uart_bus);
 }
diff --git a/shared-module/displayio/Group.c b/shared-module/displayio/Group.c
index d69e9f585..15cf5b8e4 100644
--- a/shared-module/displayio/Group.c
+++ b/shared-module/displayio/Group.c
@@ -29,6 +29,11 @@
 #include "py/runtime.h"
 #include "shared-bindings/displayio/TileGrid.h"
 
+#if CIRCUITPY_VECTORIO
+#include "shared-bindings/vectorio/VectorShape.h"
+#endif
+
+
 void common_hal_displayio_group_construct(displayio_group_t* self, uint32_t max_size, uint32_t scale, mp_int_t x, mp_int_t y) {
     displayio_group_child_t* children = m_new(displayio_group_child_t, max_size);
     displayio_group_construct(self, children, max_size, scale, x, y);
@@ -117,6 +122,12 @@ static void _update_child_transforms(displayio_group_t* self) {
     }
     for (size_t i = 0; i < self->size; i++) {
         mp_obj_t layer = self->children[i].native;
+#if CIRCUITPY_VECTORIO
+        if (MP_OBJ_IS_TYPE(layer, &vectorio_vector_shape_type)) {
+            vectorio_vector_shape_update_transform(layer, &self->absolute_transform);
+        }
+        else
+#endif
         if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
             displayio_tilegrid_update_transform(layer, &self->absolute_transform);
         } else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
@@ -200,7 +211,15 @@ void common_hal_displayio_group_set_y(displayio_group_t* self, mp_int_t y) {
 }
 
 static mp_obj_t _add_layer(displayio_group_t* self, mp_obj_t layer) {
-    mp_obj_t native_layer = mp_instance_cast_to_native_base(layer, &displayio_group_type);
+    mp_obj_t native_layer;
+#if CIRCUITPY_VECTORIO
+    native_layer = mp_instance_cast_to_native_base(layer, &vectorio_vector_shape_type);
+    if (native_layer != MP_OBJ_NULL) {
+        vectorio_vector_shape_update_transform(native_layer, &self->absolute_transform);
+        return native_layer;
+    }
+#endif
+    native_layer = mp_instance_cast_to_native_base(layer, &displayio_group_type);
     if (native_layer == MP_OBJ_NULL) {
         native_layer = mp_instance_cast_to_native_base(layer, &displayio_tilegrid_type);
         if (native_layer == MP_OBJ_NULL) {
@@ -229,6 +248,14 @@ static void _remove_layer(displayio_group_t* self, size_t index) {
     mp_obj_t layer = self->children[index].native;
     displayio_area_t layer_area;
     bool rendered_last_frame = false;
+#if CIRCUITPY_VECTORIO
+    if (MP_OBJ_IS_TYPE(layer, &vectorio_vector_shape_type)) {
+        bool has_dirty_area = vectorio_vector_shape_get_dirty_area(layer, &layer_area);
+        rendered_last_frame = has_dirty_area;
+        vectorio_vector_shape_update_transform(layer, NULL);
+    }
+    else
+#endif
     if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
         displayio_tilegrid_t* tilegrid = layer;
         rendered_last_frame = displayio_tilegrid_get_previous_area(tilegrid, &layer_area);
@@ -317,6 +344,15 @@ bool displayio_group_fill_area(displayio_group_t *self, const _displayio_colorsp
     bool full_coverage = false;
     for (int32_t i = self->size - 1; i >= 0 ; i--) {
         mp_obj_t layer = self->children[i].native;
+#if CIRCUITPY_VECTORIO
+        if (MP_OBJ_IS_TYPE(layer, &vectorio_vector_shape_type)) {
+            if (vectorio_vector_shape_fill_area(layer, colorspace, area, mask, buffer)) {
+                full_coverage = true;
+                break;
+            }
+        }
+        else
+#endif
         if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
             if (displayio_tilegrid_fill_area(layer, colorspace, area, mask, buffer)) {
                 full_coverage = true;
@@ -336,6 +372,12 @@ void displayio_group_finish_refresh(displayio_group_t *self) {
     self->item_removed = false;
     for (int32_t i = self->size - 1; i >= 0 ; i--) {
         mp_obj_t layer = self->children[i].native;
+#if CIRCUITPY_VECTORIO
+        if (MP_OBJ_IS_TYPE(layer, &vectorio_vector_shape_type)) {
+            vectorio_vector_shape_finish_refresh(layer);
+        }
+        else
+#endif
         if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
             displayio_tilegrid_finish_refresh(layer);
         } else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
@@ -352,6 +394,12 @@ displayio_area_t* displayio_group_get_refresh_areas(displayio_group_t *self, dis
 
     for (int32_t i = self->size - 1; i >= 0 ; i--) {
         mp_obj_t layer = self->children[i].native;
+#if CIRCUITPY_VECTORIO
+        if (MP_OBJ_IS_TYPE(layer, &vectorio_vector_shape_type)) {
+            tail = vectorio_vector_shape_get_refresh_areas(layer, tail);
+        }
+        else
+#endif
         if (MP_OBJ_IS_TYPE(layer, &displayio_tilegrid_type)) {
             tail = displayio_tilegrid_get_refresh_areas(layer, tail);
         } else if (MP_OBJ_IS_TYPE(layer, &displayio_group_type)) {
diff --git a/shared-module/displayio/display_core.c b/shared-module/displayio/display_core.c
index d01100f7f..43f2d1937 100644
--- a/shared-module/displayio/display_core.c
+++ b/shared-module/displayio/display_core.c
@@ -40,6 +40,9 @@
 #include <stdint.h>
 #include <string.h>
 
+#define DISPLAYIO_CORE_DEBUG(...) (void)0
+// #define DISPLAYIO_CORE_DEBUG(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
+
 void displayio_display_core_construct(displayio_display_core_t* self,
         mp_obj_t bus, uint16_t width, uint16_t height, uint16_t ram_width, uint16_t ram_height, int16_t colstart, int16_t rowstart, uint16_t rotation,
         uint16_t color_depth, bool grayscale, bool pixels_in_byte_share_row, uint8_t bytes_per_cell, bool reverse_pixels_in_byte, bool reverse_bytes_in_word) {
@@ -298,6 +301,7 @@ void displayio_display_core_start_refresh(displayio_display_core_t* self) {
 
 void displayio_display_core_finish_refresh(displayio_display_core_t* self) {
     if (self->current_group != NULL) {
+        DISPLAYIO_CORE_DEBUG("displayiocore group_finish_refresh\n");
         displayio_group_finish_refresh(self->current_group);
     }
     self->full_refresh = false;
diff --git a/shared-module/gamepad/GamePad.c b/shared-module/gamepad/GamePad.c
index fdce0caab..7b4108eb2 100644
--- a/shared-module/gamepad/GamePad.c
+++ b/shared-module/gamepad/GamePad.c
@@ -27,6 +27,7 @@
 #include "py/mpstate.h"
 #include "shared-bindings/digitalio/DigitalInOut.h"
 #include "shared-bindings/gamepad/GamePad.h"
+#include "supervisor/shared/tick.h"
 
 void common_hal_gamepad_gamepad_init(gamepad_obj_t *gamepad,
                   const mp_obj_t pins[], size_t n_pins) {
@@ -54,4 +55,5 @@ void common_hal_gamepad_gamepad_init(gamepad_obj_t *gamepad,
 
 void common_hal_gamepad_gamepad_deinit(gamepad_obj_t *self) {
     MP_STATE_VM(gamepad_singleton) = NULL;
+    supervisor_disable_tick();
 }
diff --git a/shared-module/gamepad/__init__.c b/shared-module/gamepad/__init__.c
index 3e17a0fb5..9874b2752 100644
--- a/shared-module/gamepad/__init__.c
+++ b/shared-module/gamepad/__init__.c
@@ -29,6 +29,7 @@
 #include "py/mpstate.h"
 #include "shared-bindings/gamepad/__init__.h"
 #include "shared-bindings/gamepad/GamePad.h"
+#include "supervisor/shared/tick.h"
 
 #include "shared-bindings/digitalio/DigitalInOut.h"
 
@@ -59,5 +60,8 @@ void gamepad_tick(void) {
 }
 
 void gamepad_reset(void) {
+    if (MP_STATE_VM(gamepad_singleton)) {
+        supervisor_disable_tick();
+    }
     MP_STATE_VM(gamepad_singleton) = NULL;
 }
diff --git a/shared-module/gamepadshift/GamePadShift.c b/shared-module/gamepadshift/GamePadShift.c
index b8fb4d3f4..51da61702 100644
--- a/shared-module/gamepadshift/GamePadShift.c
+++ b/shared-module/gamepadshift/GamePadShift.c
@@ -27,6 +27,7 @@
 #include "py/mpstate.h"
 #include "shared-bindings/digitalio/DigitalInOut.h"
 #include "shared-module/gamepadshift/GamePadShift.h"
+#include "supervisor/shared/tick.h"
 
 void common_hal_gamepadshift_gamepadshift_init(gamepadshift_obj_t *gamepadshift,
                                                 digitalio_digitalinout_obj_t *clock_pin,
@@ -46,4 +47,5 @@ void common_hal_gamepadshift_gamepadshift_init(gamepadshift_obj_t *gamepadshift,
 
 void common_hal_gamepadshift_gamepadshift_deinit(gamepadshift_obj_t *gamepadshift) {
     MP_STATE_VM(gamepad_singleton) = NULL;
+    supervisor_disable_tick();
 }
diff --git a/shared-module/vectorio/Circle.c b/shared-module/vectorio/Circle.c
new file mode 100644
index 000000000..999d62512
--- /dev/null
+++ b/shared-module/vectorio/Circle.c
@@ -0,0 +1,56 @@
+
+#include "shared-bindings/vectorio/Circle.h"
+#include "shared-module/vectorio/__init__.h"
+#include "shared-module/displayio/area.h"
+
+#include "py/runtime.h"
+#include "stdlib.h"
+
+
+void common_hal_vectorio_circle_construct(vectorio_circle_t *self, uint16_t radius) {
+    self->radius = radius;
+    self->on_dirty.obj = NULL;
+}
+
+void common_hal_vectorio_circle_set_on_dirty(vectorio_circle_t *self, vectorio_event_t on_dirty) {
+    if (self->on_dirty.obj != NULL) {
+        mp_raise_TypeError(translate("circle can only be registered in one parent"));
+    }
+    self->on_dirty = on_dirty;
+}
+
+
+uint32_t common_hal_vectorio_circle_get_pixel(void *obj, int16_t x, int16_t y) {
+    vectorio_circle_t *self = obj;
+    int16_t radius = abs(self->radius);
+    x = abs(x);
+    y = abs(y);
+    if (x+y <= radius) return 1;
+    if (x > radius) return 0;
+    if (y > radius) return 0;
+    const bool pythagorasSmallerThanRadius = (int32_t)x*x + (int32_t)y*y <= (int32_t)radius*radius;
+    return pythagorasSmallerThanRadius ? 1 : 0;
+}
+
+
+void common_hal_vectorio_circle_get_area(void *circle, displayio_area_t *out_area) {
+    vectorio_circle_t *self = circle;
+    out_area->x1 = -1 * self->radius - 1;
+    out_area->y1 = -1 * self->radius - 1;
+    out_area->x2 = self->radius + 1;
+    out_area->y2 = self->radius + 1;
+}
+
+int16_t common_hal_vectorio_circle_get_radius(void *obj) {
+    vectorio_circle_t *self = obj;
+    return self->radius;
+}
+
+void common_hal_vectorio_circle_set_radius(void *obj, int16_t radius) {
+    vectorio_circle_t *self = obj;
+    self->radius = abs(radius);
+    if (self->on_dirty.obj != NULL) {
+        self->on_dirty.event(self->on_dirty.obj);
+    }
+}
+
diff --git a/shared-module/vectorio/Circle.h b/shared-module/vectorio/Circle.h
new file mode 100644
index 000000000..4b43d767e
--- /dev/null
+++ b/shared-module/vectorio/Circle.h
@@ -0,0 +1,17 @@
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_CIRCLE_H
+#define MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_CIRCLE_H
+
+#include <stdint.h>
+
+#include "py/obj.h"
+
+#include "shared-module/vectorio/__init__.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint16_t radius;
+    vectorio_event_t on_dirty;
+} vectorio_circle_t;
+
+#endif // MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_CIRCLE_H
+
diff --git a/shared-module/vectorio/Polygon.c b/shared-module/vectorio/Polygon.c
new file mode 100644
index 000000000..aadf47911
--- /dev/null
+++ b/shared-module/vectorio/Polygon.c
@@ -0,0 +1,147 @@
+
+#include "shared-module/vectorio/__init__.h"
+#include "shared-bindings/vectorio/Polygon.h"
+#include "shared-module/displayio/area.h"
+
+#include "py/runtime.h"
+#include "py/gc.h"
+
+#include "stdlib.h"
+#include <stdio.h>
+
+
+#define VECTORIO_POLYGON_DEBUG(...) (void)0
+// #define VECTORIO_POLYGON_DEBUG(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
+
+
+// Converts a list of points tuples to a flat list of ints for speedier internal use.
+// Also validates the points.
+static void _clobber_points_list(vectorio_polygon_t *self, mp_obj_t points_tuple_list) {
+    size_t len = 0;
+    mp_obj_t *items;
+    mp_obj_list_get(points_tuple_list, &len, &items);
+    VECTORIO_POLYGON_DEBUG("polygon_points_list len: %d\n", len);
+
+    if ( len < 3 ) {
+        mp_raise_TypeError_varg(translate("Polygon needs at least 3 points"));
+    }
+
+    if ( self->len < 2*len ) {
+        if ( self->points_list != NULL ) {
+            gc_free( self->points_list );
+        }
+        self->points_list = gc_alloc( 2 * len * sizeof(int), false, false );
+    }
+    self->len = 2*len;
+
+    for ( size_t i = 0; i < len; ++i) {
+        size_t tuple_len = 0;
+        mp_obj_t *tuple_items;
+        mp_obj_tuple_get(items[i], &tuple_len, &tuple_items);
+
+        if (tuple_len != 2) {
+            mp_raise_ValueError_varg(translate("%q must be a tuple of length 2"), MP_QSTR_point);
+        }
+        if (   !mp_obj_get_int_maybe(tuple_items[ 0 ], &self->points_list[2*i    ])
+            || !mp_obj_get_int_maybe(tuple_items[ 1 ], &self->points_list[2*i + 1])
+        ) {
+            self->len = 0;
+            gc_free( self->points_list );
+            self->points_list = NULL;
+            mp_raise_ValueError_varg(translate("unsupported %q type"), MP_QSTR_point);
+        }
+    }
+}
+
+
+
+void common_hal_vectorio_polygon_construct(vectorio_polygon_t *self, mp_obj_t points_list) {
+    VECTORIO_POLYGON_DEBUG("%p polygon_construct\n", self);
+    self->points_list = NULL;
+    self->len = 0;
+    self->on_dirty.obj = NULL;
+    _clobber_points_list( self, points_list );
+}
+
+
+mp_obj_t common_hal_vectorio_polygon_get_points(vectorio_polygon_t *self) {
+    return self->points_list;
+}
+void common_hal_vectorio_polygon_set_points(vectorio_polygon_t *self, mp_obj_t points_list) {
+    _clobber_points_list( self, points_list );
+    if (self->on_dirty.obj != NULL) {
+        self->on_dirty.event(self->on_dirty.obj);
+    }
+}
+
+void common_hal_vectorio_polygon_set_on_dirty(vectorio_polygon_t *self, vectorio_event_t notification) {
+    if ( self->on_dirty.obj != NULL ) {
+        mp_raise_TypeError(translate("polygon can only be registered in one parent"));
+    }
+    self->on_dirty = notification;
+}
+
+
+void common_hal_vectorio_polygon_get_area(void *polygon, displayio_area_t *area) {
+    vectorio_polygon_t *self = polygon;
+
+    area->x1 = SHRT_MAX;
+    area->y1 = SHRT_MAX;
+    area->x2 = SHRT_MIN;
+    area->y2 = SHRT_MIN;
+    for (size_t i=0; i < self->len; ++i) {
+        int x = self->points_list[i];
+        ++i;
+        int y = self->points_list[i];
+        if (x <= area->x1) area->x1 = x-1;
+        if (y <= area->y1) area->y1 = y-1;
+        if (x >= area->x2) area->x2 = x+1;
+        if (y >= area->y2) area->y2 = y+1;
+    }
+}
+
+
+// <0 if the point is to the left of the line vector
+//  0 if the point is on the line
+// >0 if the point is to the right of the line vector
+__attribute__((always_inline)) static inline int line_side( mp_int_t x1, mp_int_t y1, mp_int_t x2, mp_int_t y2, int16_t px, int16_t py ) {
+    return (px - x1) * (y2 - y1)
+         - (py - y1) * (x2 - x1);
+}
+
+
+uint32_t common_hal_vectorio_polygon_get_pixel(void *obj, int16_t x, int16_t y) {
+    VECTORIO_POLYGON_DEBUG("%p polygon get_pixel %d, %d\n", obj, x, y);
+    vectorio_polygon_t *self = obj;
+
+    if (self->len == 0) {
+        return 0;
+    }
+
+    int winding_number = 0;
+    int x1 = self->points_list[0];
+    int y1 = self->points_list[1];
+    for (size_t i=2; i <= self->len + 1; ++i) {
+        VECTORIO_POLYGON_DEBUG("  {(%3d, %3d),", x1, y1);
+        int x2 = self->points_list[i % self->len];
+        ++i;
+        int y2 = self->points_list[i % self->len];
+        VECTORIO_POLYGON_DEBUG(" (%3d, %3d)}\n", x2, y2);
+        if ( y1 <= y ) {
+            if ( y2 > y && line_side(x1, y1, x2, y2, x, y) > 0 ) {
+                // Wind up, point is to the right of the edge vector
+                ++winding_number;
+                VECTORIO_POLYGON_DEBUG("    wind:%2d winding_number:%2d\n", 1, winding_number);
+            }
+        } else if ( y2 <= y && line_side(x1, y1, x2, y2, x, y) < 0 ) {
+            // Wind down, point is to the left of the edge vector
+            --winding_number;
+            VECTORIO_POLYGON_DEBUG("    wind:%2d winding_number:%2d\n", -1, winding_number); 
+        }
+
+        x1 = x2;
+        y1 = y2;
+    }
+    return winding_number == 0 ? 0 : 1;
+}
+
diff --git a/shared-module/vectorio/Polygon.h b/shared-module/vectorio/Polygon.h
new file mode 100644
index 000000000..70de9036d
--- /dev/null
+++ b/shared-module/vectorio/Polygon.h
@@ -0,0 +1,17 @@
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_POLYGON_H
+#define MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_POLYGON_H
+
+#include <stdint.h>
+
+#include "py/obj.h"
+#include "shared-module/vectorio/__init__.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    // An int array[ x, y, ... ]
+    int *points_list;
+    size_t len;
+    vectorio_event_t on_dirty;
+} vectorio_polygon_t;
+
+#endif // MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_POLYGON_H
diff --git a/shared-module/vectorio/Rectangle.c b/shared-module/vectorio/Rectangle.c
new file mode 100644
index 000000000..7fabe6ff9
--- /dev/null
+++ b/shared-module/vectorio/Rectangle.c
@@ -0,0 +1,35 @@
+#include "shared-bindings/vectorio/Rectangle.h"
+#include "shared-module/displayio/area.h"
+
+#include "py/runtime.h"
+
+
+void common_hal_vectorio_rectangle_construct(vectorio_rectangle_t *self, uint32_t width, uint32_t height) {
+    self->width = width;
+    self->height = height;
+}
+
+
+uint32_t common_hal_vectorio_rectangle_get_pixel(void *obj, int16_t x, int16_t y) {
+    vectorio_rectangle_t *self = obj;
+    if (x < 0 || x > self->width || y > self->height || y < 0) {
+        return 0;
+    }
+    return 1;
+}
+
+
+void common_hal_vectorio_rectangle_get_area(void *rectangle, displayio_area_t *out_area) {
+    vectorio_rectangle_t *self = rectangle;
+    out_area->x1 = -1;
+    out_area->y1 = -1;
+    out_area->x2 = self->width;
+    out_area->y2 = self->height;
+}
+
+
+uint32_t common_hal_vectorio_rectangle_get_height(void *rectangle) {
+    vectorio_rectangle_t *self = rectangle;
+    return self->height;
+}
+
diff --git a/shared-module/vectorio/Rectangle.h b/shared-module/vectorio/Rectangle.h
new file mode 100644
index 000000000..c1f2a7a64
--- /dev/null
+++ b/shared-module/vectorio/Rectangle.h
@@ -0,0 +1,15 @@
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_RECTANGLE_H
+#define MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_RECTANGLE_H
+
+#include <stdint.h>
+
+#include "py/obj.h"
+
+typedef struct {
+    mp_obj_base_t base;
+    uint16_t width;
+    uint16_t height;
+} vectorio_rectangle_t;
+
+#endif // MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_RECTANGLE_H
+
diff --git a/shared-module/vectorio/VectorShape.c b/shared-module/vectorio/VectorShape.c
new file mode 100644
index 000000000..4fb353aae
--- /dev/null
+++ b/shared-module/vectorio/VectorShape.c
@@ -0,0 +1,336 @@
+
+#include "stdlib.h"
+
+#include "shared-module/vectorio/__init__.h"
+#include "shared-bindings/vectorio/VectorShape.h"
+
+#include "py/runtime.h"
+#include "shared-bindings/time/__init__.h"
+#include "shared-bindings/displayio/ColorConverter.h"
+#include "shared-bindings/displayio/Palette.h"
+
+#include "shared-bindings/vectorio/Circle.h"
+#include "shared-bindings/vectorio/Polygon.h"
+#include "shared-bindings/vectorio/Rectangle.h"
+
+// Lifecycle actions.
+#define VECTORIO_SHAPE_DEBUG(...) (void)0
+// #define VECTORIO_SHAPE_DEBUG(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
+
+
+// Used in both logging and ifdefs, for extra variables
+// #define VECTORIO_PERF(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
+
+
+// Really verbose.
+#define VECTORIO_SHAPE_PIXEL_DEBUG(...) (void)0
+// #define VECTORIO_SHAPE_PIXEL_DEBUG(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
+
+
+inline __attribute__((always_inline))
+static int32_t max(int32_t a, int32_t b) {
+    return a > b ? a : b;
+}
+
+
+inline __attribute__((always_inline))
+static void _get_screen_area(vectorio_vector_shape_t *self, displayio_area_t *out_area) {
+    VECTORIO_SHAPE_DEBUG("%p get_screen_area tform:{x:%d y:%d dx:%d dy:%d scl:%d w:%d h:%d mx:%d my:%d tr:%d}", self,
+        self->absolute_transform->x, self->absolute_transform->y, self->absolute_transform->dx, self->absolute_transform->dy, self->absolute_transform->scale,
+        self->absolute_transform->width, self->absolute_transform->height, self->absolute_transform->mirror_x, self->absolute_transform->mirror_y, self->absolute_transform->transpose_xy
+    );
+    self->ishape.get_area(self->ishape.shape, out_area);
+    VECTORIO_SHAPE_DEBUG(" in:{(%5d,%5d), (%5d,%5d)}", out_area->x1, out_area->y1, out_area->x2, out_area->y2);
+    if (self->absolute_transform->transpose_xy) {
+        int16_t swap = out_area->x1;
+        out_area->x1 = (out_area->y1 + self->y) * self->absolute_transform->dx + self->absolute_transform->x;
+        out_area->y1 = (swap         + self->x) * self->absolute_transform->dy + self->absolute_transform->y;
+        swap = out_area->x2;
+        out_area->x2 = (out_area->y2 + self->y) * self->absolute_transform->dx + self->absolute_transform->x;
+        out_area->y2 = (swap +         self->x) * self->absolute_transform->dy + self->absolute_transform->y;
+    } else {
+        out_area->x1 = (out_area->x1 + self->x) * self->absolute_transform->dx + self->absolute_transform->x;
+        out_area->y1 = (out_area->y1 + self->y) * self->absolute_transform->dy + self->absolute_transform->y;
+        out_area->x2 = (out_area->x2 + self->x) * self->absolute_transform->dx + self->absolute_transform->x;
+        out_area->y2 = (out_area->y2 + self->y) * self->absolute_transform->dy + self->absolute_transform->y;
+    }
+    // We might have mirrored due to dx
+    if (out_area->x2 < out_area->x1) {
+        int16_t swap = out_area->x1;
+        out_area->x1 = out_area->x2;
+        out_area->x2 = swap;
+    }
+    if (out_area->y2 < out_area->y1) {
+        int16_t swap = out_area->y1;
+        out_area->y1 = out_area->y2;
+        out_area->y2 = swap;
+    }
+    VECTORIO_SHAPE_DEBUG(" out:{(%5d,%5d), (%5d,%5d)}\n", out_area->x1, out_area->y1, out_area->x2, out_area->y2);
+}
+
+
+// For use by Group to know where it needs to redraw on layer removal.
+bool vectorio_vector_shape_get_dirty_area(vectorio_vector_shape_t *self, displayio_area_t *out_area) {
+    displayio_area_copy(&self->ephemeral_dirty_area, out_area);
+    return true; // For now just always redraw.
+}
+
+
+// This must be invoked each time a shape changes its position or its shape in any way.
+void common_hal_vectorio_vector_shape_set_dirty(void *vector_shape) {
+    vectorio_vector_shape_t *self = vector_shape;
+    // In screen space.  Need to offset the shape space.
+    displayio_area_t current_area;
+    _get_screen_area(self, &current_area);
+    VECTORIO_SHAPE_DEBUG("%p shape_dirty current:{(%3d,%3d), (%3d,%3d)} dirty:{(%3d,%3d), (%3d,%3d)}",
+        self,
+        current_area.x1, current_area.y1, current_area.x2, current_area.y2,
+        self->ephemeral_dirty_area.x1, self->ephemeral_dirty_area.y1, self->ephemeral_dirty_area.x2, self->ephemeral_dirty_area.y2);
+    self->dirty = true;
+    // Dirty area tracks the shape's footprint between draws.  It's reset on refresh finish,
+    displayio_area_expand(&self->ephemeral_dirty_area, &current_area);
+    VECTORIO_SHAPE_DEBUG(" -> expanded:{(%3d,%3d), (%3d,%3d)}\n", self->ephemeral_dirty_area.x1, self->ephemeral_dirty_area.y1, self->ephemeral_dirty_area.x2, self->ephemeral_dirty_area.y2);
+}
+
+
+static displayio_buffer_transform_t null_transform = {
+    .x = 0,
+    .y = 0,
+    .dx = 1,
+    .dy = 1,
+    .scale = 1,
+    .width = 0,
+    .height = 0,
+    .mirror_x = false,
+    .mirror_y = false,
+    .transpose_xy = false
+};
+
+
+void common_hal_vectorio_vector_shape_construct(vectorio_vector_shape_t *self,
+        vectorio_ishape_t ishape,
+        mp_obj_t pixel_shader, uint16_t x, uint16_t y) {
+    VECTORIO_SHAPE_DEBUG("%p vector_shape_construct x:%3d, y:%3d\n", self, x, y);
+    self->x = x;
+    self->y = y;
+    self->pixel_shader = pixel_shader;
+    self->ishape = ishape;
+    self->dirty = true;
+    self->absolute_transform = &null_transform; // Critical to have a valid transform before getting screen area.
+    _get_screen_area(self, &self->ephemeral_dirty_area);
+    self->ephemeral_dirty_area.next = NULL;
+}
+
+
+mp_int_t common_hal_vectorio_vector_shape_get_x(vectorio_vector_shape_t *self) {
+    VECTORIO_SHAPE_DEBUG("%p get_x\n", self);
+    return self->x;
+}
+
+
+void common_hal_vectorio_vector_shape_set_x(vectorio_vector_shape_t *self, mp_int_t x) {
+    VECTORIO_SHAPE_DEBUG("%p set_x %d\n", self, x);
+    if (self->x == x) {
+        return;
+    }
+    self->x = x;
+    common_hal_vectorio_vector_shape_set_dirty(self);
+}
+
+
+mp_int_t common_hal_vectorio_vector_shape_get_y(vectorio_vector_shape_t *self) {
+    VECTORIO_SHAPE_DEBUG("%p get_y\n", self);
+    return self->y;
+}
+
+
+void common_hal_vectorio_vector_shape_set_y(vectorio_vector_shape_t *self, mp_int_t y) {
+    VECTORIO_SHAPE_DEBUG("%p set_y %d\n", self, y);
+    if (self->y == y) {
+        return;
+    }
+    self->y = y;
+    common_hal_vectorio_vector_shape_set_dirty(self);
+}
+
+
+mp_obj_t common_hal_vectorio_vector_shape_get_pixel_shader(vectorio_vector_shape_t *self) {
+    VECTORIO_SHAPE_DEBUG("%p get_pixel_shader\n", self);
+    return self->pixel_shader;
+}
+
+void common_hal_vectorio_vector_shape_set_pixel_shader(vectorio_vector_shape_t *self, mp_obj_t pixel_shader) {
+    VECTORIO_SHAPE_DEBUG("%p set_pixel_shader\n", self);
+    self->pixel_shader = pixel_shader;
+    common_hal_vectorio_vector_shape_set_dirty(self);
+}
+
+
+bool vectorio_vector_shape_fill_area(vectorio_vector_shape_t *self, const _displayio_colorspace_t* colorspace, const displayio_area_t* area, uint32_t* mask, uint32_t *buffer) {
+    // Shape areas are relative to 0,0.  This will allow rotation about a known axis.
+    //   The consequence is that the area reported by the shape itself is _relative_ to 0,0.
+    //   To make it relative to the VectorShape position, we must shift it.
+    // Pixels are drawn on the screen_area (shifted) coordinate space, while pixels are _determined_ from
+    //   the shape_area (unshifted) space.
+#ifdef VECTORIO_PERF
+    uint64_t start = common_hal_time_monotonic_ns();
+    uint64_t pixel_time = 0;
+#endif
+    displayio_area_t overlap;
+    VECTORIO_SHAPE_DEBUG("%p fill_area dirty:%d fill: {(%5d,%5d), (%5d,%5d)} dirty: {(%5d,%5d), (%5d,%5d)}",
+        self, self->dirty,
+        area->x1, area->y1, area->x2, area->y2,
+        self->ephemeral_dirty_area.x1, self->ephemeral_dirty_area.y1, self->ephemeral_dirty_area.x2, self->ephemeral_dirty_area.y2
+    );
+    if (!displayio_area_compute_overlap(area, &self->ephemeral_dirty_area, &overlap)) {
+        VECTORIO_SHAPE_DEBUG(" no overlap\n");
+        return false;
+    }
+    VECTORIO_SHAPE_DEBUG(", overlap: {(%3d,%3d), (%3d,%3d)}", overlap.x1, overlap.y1, overlap.x2, overlap.y2);
+
+    bool full_coverage = displayio_area_equal(area, &overlap);
+
+    uint8_t pixels_per_byte = 8 / colorspace->depth;
+    
+    uint32_t linestride_px = displayio_area_width(area);
+    uint32_t line_dirty_offset_px = (overlap.y1 - area->y1) * linestride_px;
+    uint32_t column_dirty_offset_px = overlap.x1 - area->x1;
+    VECTORIO_SHAPE_DEBUG(", linestride:%3d line_offset:%3d col_offset:%3d depth:%2d ppb:%2d shape:%s",
+        linestride_px, line_dirty_offset_px, column_dirty_offset_px, colorspace->depth, pixels_per_byte, mp_obj_get_type_str(self->ishape.shape));
+
+    displayio_input_pixel_t input_pixel;
+    displayio_output_pixel_t output_pixel;
+
+    uint32_t mask_start_px = line_dirty_offset_px;
+    for (input_pixel.y = overlap.y1; input_pixel.y < overlap.y2; ++input_pixel.y) {
+        mask_start_px += column_dirty_offset_px;
+        for (input_pixel.x = overlap.x1; input_pixel.x < overlap.x2; ++input_pixel.x) {
+            // Check the mask first to see if the pixel has already been set.
+            uint32_t pixel_index = mask_start_px + (input_pixel.x - overlap.x1);
+            uint32_t *mask_doubleword = &(mask[pixel_index / 32]);
+            uint8_t mask_bit          =        pixel_index % 32;
+            VECTORIO_SHAPE_PIXEL_DEBUG("%p pixel_index: %5u mask_bit: %2u", self, pixel_index, mask_bit);
+            if ((*mask_doubleword & (1u << mask_bit)) != 0) {
+                VECTORIO_SHAPE_PIXEL_DEBUG(" masked\n");
+                continue;
+            }
+            output_pixel.pixel = 0;
+
+            // Get the target pixel based on the shape's coordinate space
+            int16_t pixel_to_get_x;
+            int16_t pixel_to_get_y;
+            if (self->absolute_transform->transpose_xy) {
+                pixel_to_get_x = (input_pixel.y - self->absolute_transform->dy * self->x - self->absolute_transform->y) / self->absolute_transform->dy;
+                pixel_to_get_y = (input_pixel.x - self->absolute_transform->dx * self->y - self->absolute_transform->x) / self->absolute_transform->dx;
+            } else {
+                pixel_to_get_x = (input_pixel.x - self->absolute_transform->dx * self->x) / self->absolute_transform->dx;
+                pixel_to_get_y = (input_pixel.y - self->absolute_transform->dy * self->y) / self->absolute_transform->dy;
+            }
+            VECTORIO_SHAPE_PIXEL_DEBUG(" get_pixel %p (%3d, %3d) -> ( %3d, %3d )", self->ishape.shape, input_pixel.x, input_pixel.y, pixel_to_get_x, pixel_to_get_y);
+#ifdef VECTORIO_PERF
+            uint64_t pre_pixel = common_hal_time_monotonic_ns();
+#endif
+            input_pixel.pixel = self->ishape.get_pixel(self->ishape.shape, pixel_to_get_x, pixel_to_get_y);
+#ifdef VECTORIO_PERF
+            uint64_t post_pixel = common_hal_time_monotonic_ns();
+            pixel_time += post_pixel - pre_pixel;
+#endif
+            VECTORIO_SHAPE_PIXEL_DEBUG(" -> %d", input_pixel.pixel);
+
+            output_pixel.opaque = true;
+            if (self->pixel_shader == mp_const_none) {
+                output_pixel.pixel = input_pixel.pixel;
+            } else if (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_palette_type)) {
+                output_pixel.opaque = displayio_palette_get_color(self->pixel_shader, colorspace, input_pixel.pixel, &output_pixel.pixel);
+            } else if (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_colorconverter_type)) {
+                displayio_colorconverter_convert(self->pixel_shader, colorspace, &input_pixel, &output_pixel);
+            }
+            if (!output_pixel.opaque) {
+                VECTORIO_SHAPE_PIXEL_DEBUG(" (encountered transparent pixel; input area is not fully covered)\n");
+                full_coverage = false;
+            } else {
+                *mask_doubleword |= 1u << mask_bit;
+                if (colorspace->depth == 16) {
+                    VECTORIO_SHAPE_PIXEL_DEBUG(" buffer = %04x 16\n", output_pixel.pixel);
+                    *(((uint16_t*) buffer) + pixel_index) = output_pixel.pixel;
+                } else if (colorspace->depth == 8) {
+                    VECTORIO_SHAPE_PIXEL_DEBUG(" buffer = %02x 8\n", output_pixel.pixel);
+                    *(((uint8_t*) buffer) + pixel_index) = output_pixel.pixel;
+                } else if (colorspace->depth < 8) {
+                    // Reorder the offsets to pack multiple rows into a byte (meaning they share a column).
+                    if (!colorspace->pixels_in_byte_share_row) {
+                        uint16_t width = linestride_px;
+                        uint16_t row = pixel_index / width;
+                        uint16_t col = pixel_index % width;
+                        pixel_index = col * pixels_per_byte + (row / pixels_per_byte) * pixels_per_byte * width + row % pixels_per_byte;
+                    }
+                    uint8_t shift = (pixel_index % pixels_per_byte) * colorspace->depth;
+                    if (colorspace->reverse_pixels_in_byte) {
+                        // Reverse the shift by subtracting it from the leftmost shift.
+                        shift = (pixels_per_byte - 1) * colorspace->depth - shift;
+                    }
+                    VECTORIO_SHAPE_PIXEL_DEBUG(" buffer = %2d %d\n", output_pixel.pixel, colorspace->depth);
+                    ((uint8_t*)buffer)[pixel_index / pixels_per_byte] |= output_pixel.pixel << shift;
+                }
+            }
+        }
+        mask_start_px += linestride_px - column_dirty_offset_px;
+    }
+#ifdef VECTORIO_PERF
+    uint64_t end = common_hal_time_monotonic_ns();
+    uint32_t pixels = (overlap.x2 - overlap.x1) * (overlap.y2 - overlap.y1);
+    VECTORIO_PERF("draw %16s -> shape:{%4dpx, %4.1fms,%9.1fpps fill}  shape_pixels:{%6.1fus total, %4.1fus/px}\n",
+        mp_obj_get_type_str(self->ishape.shape),
+        (overlap.x2 - overlap.x1) * (overlap.y2 - overlap.y1),
+        (double)((end - start) / 1000000.0),
+        (double)(max(1, pixels * (1000000000.0 / (end - start)))),
+        (double)(pixel_time / 1000.0),
+        (double)(pixel_time / 1000.0 / pixels)
+    );
+#endif
+    VECTORIO_SHAPE_DEBUG(" -> pixels:%4d\n");
+    return full_coverage;
+}
+
+
+void vectorio_vector_shape_finish_refresh(vectorio_vector_shape_t *self) {
+    if ( !self->dirty ) {
+        return;
+    }
+    VECTORIO_SHAPE_DEBUG("%p finish_refresh was:{(%3d,%3d), (%3d,%3d)}\n", self, self->ephemeral_dirty_area.x1, self->ephemeral_dirty_area.y1, self->ephemeral_dirty_area.x2, self->ephemeral_dirty_area.y2);
+    self->dirty = false;
+    // Reset dirty area tracking to current footprint
+    _get_screen_area(self, &self->ephemeral_dirty_area);
+    self->ephemeral_dirty_area.next = NULL;
+    VECTORIO_SHAPE_DEBUG("%p finish_refresh now:{(%3d,%3d), (%3d,%3d)}\n", self, self->ephemeral_dirty_area.x1, self->ephemeral_dirty_area.y1, self->ephemeral_dirty_area.x2, self->ephemeral_dirty_area.y2);
+
+    if (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_palette_type)) {
+        displayio_palette_finish_refresh(self->pixel_shader);
+    } else if (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_colorconverter_type)) {
+        displayio_colorconverter_finish_refresh(self->pixel_shader);
+    }
+}
+
+
+// Assembles a singly linked list of dirty areas from all components on the display.
+displayio_area_t* vectorio_vector_shape_get_refresh_areas(vectorio_vector_shape_t *self, displayio_area_t* tail) {
+    if (self->dirty
+        || (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_palette_type) && displayio_palette_needs_refresh(self->pixel_shader))
+        || (MP_OBJ_IS_TYPE(self->pixel_shader, &displayio_colorconverter_type) && displayio_colorconverter_needs_refresh(self->pixel_shader))
+        ) {
+        VECTORIO_SHAPE_DEBUG("%p get_refresh_area dirty:%d {(%3d,%3d), (%3d,%3d)}", self, self->dirty, self->ephemeral_dirty_area.x1, self->ephemeral_dirty_area.y1, self->ephemeral_dirty_area.x2, self->ephemeral_dirty_area.y2);
+        common_hal_vectorio_vector_shape_set_dirty(self);
+        // vector.add_to_head
+        self->ephemeral_dirty_area.next = tail;
+        VECTORIO_SHAPE_DEBUG(" this_area: %p next: %p after: %p\n", &self->ephemeral_dirty_area, tail, tail == NULL ? NULL : tail->next);
+        return &self->ephemeral_dirty_area;
+    }
+    return tail;
+}
+
+void vectorio_vector_shape_update_transform(vectorio_vector_shape_t *self, displayio_buffer_transform_t *group_transform) {
+    self->absolute_transform = group_transform == NULL ? &null_transform : group_transform;
+    common_hal_vectorio_vector_shape_set_dirty(self);
+}
+
+
diff --git a/shared-module/vectorio/VectorShape.h b/shared-module/vectorio/VectorShape.h
new file mode 100644
index 000000000..56eb3d8a5
--- /dev/null
+++ b/shared-module/vectorio/VectorShape.h
@@ -0,0 +1,53 @@
+
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_SHAPE_H
+#define MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_SHAPE_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "py/obj.h"
+#include "shared-module/displayio/area.h"
+#include "shared-module/displayio/Palette.h"
+
+typedef void get_area_function(mp_obj_t shape, displayio_area_t *out_area);
+typedef uint32_t get_pixel_function(mp_obj_t shape, int16_t x, int16_t y);
+
+// This struct binds a shape's common Shape support functions (its vector shape interface)
+//   to its instance pointer.  We only check at construction time what the type of the
+//   associated shape is and link the correct functions up.
+// Later when using the shape for drawing logic these functions may be invoked
+//   unconditionally.  This simplifies the addition of new types and restricts the
+//   respective responsibilities of VectorShape and actual shape implementations.
+typedef struct {
+    mp_obj_t shape;
+    get_area_function *get_area;
+    get_pixel_function *get_pixel;
+} vectorio_ishape_t;
+
+typedef struct {
+    mp_obj_base_t base;
+    vectorio_ishape_t ishape;
+    mp_obj_t pixel_shader;
+    int16_t x;
+    int16_t y;
+    displayio_buffer_transform_t *absolute_transform;
+    bool dirty;  // True if we need to draw
+    // Tracks current shape footprint and expands outward as the shape dirties and changes.
+    // This is suboptimal if you move your shape far.  Could add more state to only redraw
+    //   exactly what we left behind.
+    displayio_area_t ephemeral_dirty_area;
+} vectorio_vector_shape_t;
+
+displayio_area_t* vectorio_vector_shape_get_refresh_areas(vectorio_vector_shape_t *self, displayio_area_t *tail);
+
+bool vectorio_vector_shape_get_dirty_area(vectorio_vector_shape_t *self, displayio_area_t *current_dirty_area);
+
+// Area is always in absolute screen coordinates.
+bool vectorio_vector_shape_fill_area(vectorio_vector_shape_t *self, const _displayio_colorspace_t *colorspace, const displayio_area_t *area, uint32_t *mask, uint32_t *buffer);
+
+// Fills in out_area with the maximum bounds of all related pixels in the last rendered frame. Returns
+// false if the vector shape wasn't rendered in the last frame.
+bool vectorio_vector_shape_get_previous_area(vectorio_vector_shape_t *self, displayio_area_t *out_area);
+void vectorio_vector_shape_finish_refresh(vectorio_vector_shape_t *self);
+
+#endif // MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_SHAPE_H
diff --git a/shared-module/vectorio/__init__.c b/shared-module/vectorio/__init__.c
new file mode 100644
index 000000000..473c509c3
--- /dev/null
+++ b/shared-module/vectorio/__init__.c
@@ -0,0 +1,3 @@
+
+// Don't need anything in here yet
+
diff --git a/shared-module/vectorio/__init__.h b/shared-module/vectorio/__init__.h
new file mode 100644
index 000000000..6ae381f06
--- /dev/null
+++ b/shared-module/vectorio/__init__.h
@@ -0,0 +1,15 @@
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_INIT_H
+#define MICROPY_INCLUDED_SHARED_MODULE_VECTORIO_INIT_H
+
+#include "py/obj.h"
+
+typedef void event_function(mp_obj_t obj);
+
+typedef struct {
+    mp_obj_t obj;
+    event_function *event;
+} vectorio_event_t;
+
+
+#endif
+