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Set bitmap and palette to have default values #37

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Merged
merged 4 commits into from
Aug 20, 2020
Merged

Set bitmap and palette to have default values #37

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9aa60f5
Set bitmap and palette to have default values
evaherrada Aug 6, 2020
1c27079
Formatting
evaherrada Aug 6, 2020
83bb738
Only import displayio if needed
evaherrada Aug 6, 2020
e6ab054
add try/except and update example
caternuson Aug 17, 2020
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13 changes: 13 additions & 0 deletions adafruit_imageload/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,19 @@ def load(filename, *, bitmap=None, palette=None):
palette is the desired pallete type. The constructor should take the number of colors and
support assignment to indices via [].
"""
if not bitmap or not palette:
try:
# use displayio if available
import displayio

if not bitmap:
bitmap = displayio.Bitmap
if not palette:
palette = displayio.Palette
except ModuleNotFoundError:
# meh, we tried
pass

with open(filename, "rb") as file:
header = file.read(3)
file.seek(0)
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5 changes: 2 additions & 3 deletions examples/imageload_simpletest.py
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Expand Up @@ -2,9 +2,8 @@
import displayio
import adafruit_imageload

image, palette = adafruit_imageload.load(
"images/4bit.bmp", bitmap=displayio.Bitmap, palette=displayio.Palette
)
image, palette = adafruit_imageload.load("images/4bit.bmp")

tile_grid = displayio.TileGrid(image, pixel_shader=palette)

group = displayio.Group()
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