Merge pull request #25 from lesamouraipourpre/ondiskbitmap-changes

Update the pixel_shader usage of OnDiskBitmap

Author: FoamyGuy

adafruit_turtle.py

@@ -641,6 +641,9 @@ def stamp(self, bitmap=None, palette=None):
         turtle position. Return a stamp_id for that stamp, which can be used to
         delete it by calling clearstamp(stamp_id).
         """
+        # The restriction on max_size in displayio.Group has been removed.
+        # For now, leave this with a limit of 6 so as not to break any
+        # deployed code.
         if len(self._fg_addon_group) >= 6:
             print("Addon group full")
             return -1
@@ -657,7 +660,11 @@ def stamp(self, bitmap=None, palette=None):
             # odb bitmap
             new_stamp = displayio.TileGrid(
                 self._turtle_odb,
-                pixel_shader=displayio.ColorConverter(),
+                pixel_shader=getattr(
+                    self._turtle_odb, "pixel_shader", displayio.ColorConverter()
+                ),
+                # TODO: Once CP6 is no longer supported, replace the above line with below
+                # pixel_shader=self._turtle_odb.pixel_shader,
                 x=int(self._x - self._turtle_odb.width // 2),
                 y=int(self._y - self._turtle_odb.height // 2),
             )
@@ -970,7 +977,10 @@ def bgpic(self, picname=None):
             with open(picname, "rb") as self._bg_pic:
                 odb = displayio.OnDiskBitmap(self._bg_pic)
             self._odb_tilegrid = displayio.TileGrid(
-                odb, pixel_shader=displayio.ColorConverter()
+                odb,
+                pixel_shader=getattr(odb, "pixel_shader", displayio.ColorConverter()),
+                # TODO: Once CP6 is no longer supported, replace the above line with below
+                # pixel_shader=odb.pixel_shader,
             )
             self._bg_addon_group.append(self._odb_tilegrid)
             self._bg_pic_filename = picname
@@ -1092,7 +1102,12 @@ def changeturtle(self, source=None, dimensions=(12, 12)):
             self._turtle_odb_use += 1
             self._turtle_pic = True
             self._turtle_alt_sprite = displayio.TileGrid(
-                self._turtle_odb, pixel_shader=displayio.ColorConverter()
+                self._turtle_odb,
+                pixel_shader=getattr(
+                    self._turtle_odb, "pixel_shader", displayio.ColorConverter()
+                ),
+                # TODO: Once CP6 is no longer supported, replace the above line with below
+                # pixel_shader=self._turtle_odb.pixel_shader,
             )
 
             if self._turtle_group:

examples/icons/Play_48x48_small.bmp

@@ -0,0 +1,2 @@
+# SPDX-FileCopyrightText: 2021 Tim C for Adafruit Industries
+# SPDX-License-Identifier: MIT

examples/icons/Play_48x48_small.bmp.license

@@ -0,0 +1,37 @@
+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+import board
+from adafruit_turtle import Color, turtle
+
+turtle = turtle(board.DISPLAY)
+
+# The purpose of this test is to check that the OnDiskBitmap usage is
+# working correctly: bgpic(), changeturtle() & stamp()
+
+# Make sure that the following file is copied to the CircuitPython drive
+ICON = "/icons/Play_48x48_small.bmp"
+turtle.bgpic(ICON)
+turtle.changeturtle(ICON)
+
+starsize = min(board.DISPLAY.width, board.DISPLAY.height) * 0.9  # 90% of screensize
+
+print("Turtle time! Lets draw a star")
+
+turtle.pencolor(Color.BLUE)
+turtle.setheading(90)
+
+turtle.penup()
+turtle.goto(-starsize / 2, 0)
+turtle.pendown()
+
+start = turtle.pos()
+while True:
+    turtle.forward(starsize)
+    turtle.stamp()
+    turtle.left(170)
+    if abs(turtle.pos() - start) < 1:
+        break
+
+while True:
+    pass