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fix error from board.DISPLAY not existing #12

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Merged
merged 1 commit into from
Aug 11, 2020
Merged

fix error from board.DISPLAY not existing #12

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7 changes: 6 additions & 1 deletion adafruit_bitmapsaver.py
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Original file line number Diff line number Diff line change
Expand Up @@ -121,7 +121,7 @@ def _write_pixels(output_file, pixel_source, palette):
# pylint:enable=too-many-locals


def save_pixels(file_or_filename, pixel_source=board.DISPLAY, palette=None):
def save_pixels(file_or_filename, pixel_source=None, palette=None):
"""Save pixels to a 24 bit per pixel BMP file.
If pixel_source if a displayio.Bitmap, save it's pixels through palette.
If it's a displayio.Display, a palette isn't required.
Expand All @@ -130,6 +130,11 @@ def save_pixels(file_or_filename, pixel_source=board.DISPLAY, palette=None):
:param pixel_source: the Bitmap or Display to save
:param palette: the Palette to use for looking up colors in the bitmap
"""
if not pixel_source:
if "DISPLAY" in dir(board):
pixel_source = board.DISPLAY
else:
raise ValueError("Second argument must be a Bitmap or Display")
if isinstance(pixel_source, Bitmap):
if not isinstance(palette, Palette):
raise ValueError("Third argument must be a Palette for a Bitmap save")
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