[python/kandinsky] Color can now be passed as a tuple

The values are expected to be integers between 0 and 255

python/port/mod/kandinsky/modkandinsky.cpp

@@ -1,38 +1,61 @@
 extern "C" {
 #include "modkandinsky.h"
+#include <py/objtuple.h>
+#include <py/runtime.h>
 }
 #include <kandinsky.h>
 #include "port.h"
 
+static KDColor ColorForTuple(mp_obj_t tuple) {
+    size_t len;
+    mp_obj_t * elem;
+
+    mp_obj_get_array(tuple, &len, &elem);
+    if (len != 3) {
+      mp_raise_TypeError("color needs 3 components");
+    }
+
+    return KDColor::RGB888(
+      mp_obj_get_int(elem[0]),
+      mp_obj_get_int(elem[1]),
+      mp_obj_get_int(elem[2])
+    );
+}
+
+static mp_obj_t TupleForRGB(uint8_t r, uint8_t g, uint8_t b) {
+  mp_obj_tuple_t * t = static_cast<mp_obj_tuple_t *>(MP_OBJ_TO_PTR(mp_obj_new_tuple(3, NULL)));
+  t->items[0] = MP_OBJ_NEW_SMALL_INT(r);
+  t->items[1] = MP_OBJ_NEW_SMALL_INT(g);
+  t->items[2] = MP_OBJ_NEW_SMALL_INT(b);
+  return MP_OBJ_FROM_PTR(t);
+}
+
 /* KDIonContext::sharedContext needs to be set to the wanted Rect before
  * calling kandinsky_get_pixel, kandinsky_set_pixel and kandinsky_draw_string.
  * We do this here with displaySandbox(), which pushes the SandboxController on
  * the stackViewController and forces the window to redraw itself.
  * KDIonContext::sharedContext is set to the frame of the last object drawn. */
 
 mp_obj_t modkandinsky_color(mp_obj_t red, mp_obj_t green, mp_obj_t blue) {
-  return
-    MP_OBJ_NEW_SMALL_INT(
-      KDColor::RGB888(
-        mp_obj_get_int(red),
-        mp_obj_get_int(green),
-        mp_obj_get_int(blue)
-      )
-    );
+  return TupleForRGB(
+    mp_obj_get_int(red),
+    mp_obj_get_int(green),
+    mp_obj_get_int(blue)
+  );
 }
 
 mp_obj_t modkandinsky_get_pixel(mp_obj_t x, mp_obj_t y) {
   KDColor c = KDIonContext::sharedContext()->getPixel(
     KDPoint(mp_obj_get_int(x), mp_obj_get_int(y))
   );
-  return MP_OBJ_NEW_SMALL_INT(c);
+  return TupleForRGB(c.red(), c.green(), c.blue());
 }
 
 mp_obj_t modkandinsky_set_pixel(mp_obj_t x, mp_obj_t y, mp_obj_t color) {
   MicroPython::ExecutionEnvironment::currentExecutionEnvironment()->displaySandbox();
   KDIonContext::sharedContext()->setPixel(
     KDPoint(mp_obj_get_int(x), mp_obj_get_int(y)),
-    KDColor::RGB16(mp_obj_get_int(color))
+    ColorForTuple(color)
   );
   return mp_const_none;
 }