Simplify pixelbuf set_pixels function

Author: dunkmann00

shared-bindings/_pixelbuf/PixelBuf.c

@@ -340,7 +340,7 @@ STATIC mp_obj_t pixelbuf_pixelbuf_subscr(mp_obj_t self_in, mp_obj_t index_in, mp
                                                    slice_len, num_items);
             }
 
-            common_hal__pixelbuf_pixelbuf_set_pixels(self_in, slice.start, slice.stop, slice.step, src_objs);
+            common_hal__pixelbuf_pixelbuf_set_pixels(self_in, slice.start, slice.step, slice_len, src_objs);
             return mp_const_none;
             #else
             return MP_OBJ_NULL; // op not supported

shared-bindings/_pixelbuf/PixelBuf.h

@@ -47,6 +47,6 @@ void common_hal__pixelbuf_pixelbuf_fill(mp_obj_t self, mp_obj_t item);
 void common_hal__pixelbuf_pixelbuf_show(mp_obj_t self);
 mp_obj_t common_hal__pixelbuf_pixelbuf_get_pixel(mp_obj_t self, size_t index);
 void common_hal__pixelbuf_pixelbuf_set_pixel(mp_obj_t self, size_t index, mp_obj_t item);
-void common_hal__pixelbuf_pixelbuf_set_pixels(mp_obj_t self_in, mp_int_t start, mp_int_t stop, mp_int_t step, mp_obj_t* values);
+void common_hal__pixelbuf_pixelbuf_set_pixels(mp_obj_t self_in, size_t start, mp_int_t step, size_t slice_len, mp_obj_t* values);
 
 #endif  // CP_SHARED_BINDINGS_PIXELBUF_PIXELBUF_H

shared-module/_pixelbuf/PixelBuf.c

@@ -216,19 +216,11 @@ void _pixelbuf_set_pixel(pixelbuf_pixelbuf_obj_t* self, size_t index, mp_obj_t v
     _pixelbuf_set_pixel_color(self, index, r, g, b, w);
 }
 
-void common_hal__pixelbuf_pixelbuf_set_pixels(mp_obj_t self_in, mp_int_t start, mp_int_t stop, mp_int_t step, mp_obj_t* values) {
+void common_hal__pixelbuf_pixelbuf_set_pixels(mp_obj_t self_in, size_t start, mp_int_t step, size_t slice_len, mp_obj_t* values) {
     pixelbuf_pixelbuf_obj_t* self = native_pixelbuf(self_in);
-    size_t source_i = 0;
-    if (step > 0) {
-        for (mp_int_t target_i = start; target_i < stop; target_i += step) {
-            _pixelbuf_set_pixel(self, target_i, values[source_i]);
-            source_i++;
-        }
-    } else {
-        for (mp_int_t target_i = start; target_i >= stop; target_i += step) {
-            _pixelbuf_set_pixel(self, target_i, values[source_i]);
-            source_i++;
-        }
+    for (size_t i = 0; i < slice_len; i++) {
+        _pixelbuf_set_pixel(self, start, values[i]);
+        start+=step;
     }
     if (self->auto_write) {
         common_hal__pixelbuf_pixelbuf_show(self_in);