Use LED strip for load progress

Author: PaintYourDragon

CLUE_Light_Painter/bmp2led.py

@@ -216,6 +216,7 @@ def process(self, input_filename, output_filename, rows,
         # Operation performed later requires a list, not a bytearray.
         # Make a copy, keeping the same values.
 #        dotstar_list = list(dotstar_buffer)
+        #reorder = [0] * dotstar_row_size
 
         # Output rows are held in RAM and periodically written,
         # marginally faster than writing each row separately.
@@ -250,6 +251,7 @@ def process(self, input_filename, output_filename, rows,
                 # Constrain bytes-to-read to pixel strip length
                 clipped_width = min(self.bmp_specs.width, self.num_pixels)
                 row_bytes = 3 * clipped_width
+                # Compute reorder list here (needs row bytes to work)
 
                 # Each output row is interpolated from two BMP rows,
                 # we'll call them 'a' and 'b' here.
@@ -263,6 +265,7 @@ def process(self, input_filename, output_filename, rows,
                     # I'm sure there's better ways but have a headache.
                     # This is ONLY needed if using the first of two
                     # benchmarked methods later (or something similar to it).
+# There's really only six possible orders, I could make a list
 #                    if self.blue_index is 0:      # BXX DotStar
 #                        offset_0 = 0     # DotStar byte 0 is BMP byte 0 (B)
 #                        if self.green_index is 1: # BGR
@@ -424,6 +427,17 @@ def process(self, input_filename, output_filename, rows,
                         # has a negative effect on ulab performance, maybe
                         # memory-management related?
 
+                        # And a third, using a reordering table...
+                        # This doesn't actually work yet because the
+                        # reorder table hasn't been computed.
+                        # Two extra items (0 and 255) are appended for
+                        # use by headers/footers/etc. Can't directly append
+                        # to ndarray, so we bytearray-ify it first.
+                        #got = bytearray(got) + bytearray([0, 255])
+                        #output_buffer[output_position:output_position +
+                        #              dotstar_row_size] = bytearray(
+                        #                  got[i] for i in reorder)
+
                         time3 += (monotonic() - row_start_time)
 
                         # Add converted data to output buffer.

CLUE_Light_Painter/code.py

@@ -174,7 +174,14 @@ def load_progress(self, amount):
         Arguments:
             amount (float) : Current 'amount loaded' coefficient; 0.0 to 1.0
         """
-        self.rect.x = int(board.DISPLAY.width * (amount - 1.0))
+        #self.rect.x = int(board.DISPLAY.width * (amount - 1.0))
+        num_on = int(amount * self.bmp2led.num_pixels + 0.5)
+        num_off = self.bmp2led.num_pixels - num_on
+        on_pixel = [255, 0, 0, 0]
+        on_pixel[1 + self.bmp2led.green_index] = 10
+        self.spi.write(bytearray([0] * 4 + on_pixel * num_on +
+                                 [255, 0, 0, 0] * num_off + [255] *
+                                 ((self.bmp2led.num_pixels + 15) // 16)))
 
 
     def load_image(self):
@@ -185,10 +192,10 @@ def load_image(self):
         """
         # Minimal progress display while image is loaded.
         group = displayio.Group()
-        group.append(centered_label('LOADING...', 30, 3))
-        self.rect = Rect(-board.DISPLAY.width, 120,
-                         board.DISPLAY.width, 40, fill=0x00B000)
-        group.append(self.rect)
+        group.append(centered_label('LOADING...', 40, 3))
+        #self.rect = Rect(-board.DISPLAY.width, 120,
+        #                 board.DISPLAY.width, 40, fill=0x00B000)
+        #group.append(self.rect)
         board.DISPLAY.show(group)
 
         # pylint: disable=eval-used
@@ -213,6 +220,7 @@ def load_image(self):
             sleep(4)
 
         board.DISPLAY.show(displayio.Group()) # Clear display
+        self.clear_strip() # LEDs off
 
 
     def paint(self):