Do you want to just set a specific pixel to a specific color? Here's how. Most of the code is the setup of necessary parts - the TileGrid, Palette, and Group. But once everything is setup, you can access pixels with the simple syntax:
bitmap[x, y] = color_value
Remember that color_value is not an actual color, but a reference to the associated Palette.
Here's a full example:
Example assumes board with a built in display.
# SPDX-FileCopyrightText: 2019 Carter Nelson for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import board
import displayio
display = board.DISPLAY
# Create a bitmap with two colors
bitmap = displayio.Bitmap(display.width, display.height, 2)
# Create a two color palette
palette = displayio.Palette(2)
palette[0] = 0x000000
palette[1] = 0xffffff
# Create a TileGrid using the Bitmap and Palette
tile_grid = displayio.TileGrid(bitmap, pixel_shader=palette)
# Create a Group
group = displayio.Group()
# Add the TileGrid to the Group
group.append(tile_grid)
# Add the Group to the Display
display.root_group = group
# Draw a pixel
bitmap[80, 50] = 1
# Draw even more pixels
for x in range(150, 170):
for y in range(100, 110):
bitmap[x, y] = 1
# Loop forever so you can enjoy your image
while True:
pass
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