1 files changed, 55 insertions, 0 deletions
diff --git a/shared-module/vectorio/Circle.c b/shared-module/vectorio/Circle.c
new file mode 100644
index 000000000..73629b8ce
--- /dev/null
+++ b/shared-module/vectorio/Circle.c
@@ -0,0 +1,55 @@
+
+#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);
+    }
+}