Pimoroni has an example that grabs a jpg online and displays it on one of their Inky e-ink displays.
I am wondering if it is possible to do the same thing with an Adafruit MagTag using CircuitPython. In the latest version of CircuitPython, there are BitmapTools that seem like they may be able to convert a .jpg file into a .bmp that is dithered appropriately for an e-ink display. There just doesn't seem to be any example code that shows how to do this.
- Is it possible?
- Any examples of using bitmaptools.dither(dest_bitmap: displayio.Bitmap, source_bitmapp: displayio.Bitmap, source_colorspace: displayio.Colorspace, algorithm: DitherAlgorithm = DitherAlgorithm.Atkinson)→ None
The code would look a little like this ...
import board
import displayio
import adafruit_imageload
display = board.DISPLAY
bitmap, palette = adafruit_imageload.load("/purple.bmp",
bitmap=displayio.Bitmap,
palette=displayio.Palette)
# Create a TileGrid to hold the bitmap
tile_grid = displayio.TileGrid(bitmap, pixel_shader=palette)
# Create a Group to hold the TileGrid
group = displayio.Group()
# Add the TileGrid to the Group
group.append(tile_grid)
# Add the Group to the Display
display.show(group)
# Loop forever so you can enjoy your image
while True:
pass
... but we would pull in a .jpg and have to do a little work on it so that the greyscale image becomes a dithered .bmp.
Any ideas?
I can pull in a .jpg. I just can't process it and display.
I was also looking for an API or something that might be able to pre-process the image from https://placekitten.com so that it would already be a dithered bitmap file. Does that exist?
