This Python script utilizes the Python Imaging Library (PIL) to create a multi-size icon file (icon.ico) from a source image (icon.png).

from_png_to_multiple_ico.py

from PIL import Image

# Define dimensions for various icon images
sizes = [(16, 16), (32, 32), (48, 48), (256, 256)]

try:
    # Open the source image (replace 'icon.png' with the path to your image file)
    source_image = Image.open("icon.png")

    # Check if the source image size is at least 256x256
    if source_image.size[0] < 256 or source_image.size[1] < 256:
        raise ValueError("Error: Minimum 'icon.png' size should be 256x256.")
except FileNotFoundError:
    print("Error: 'icon.png' file not found.")
    # You can add additional handling or exit the script if needed.
    exit()
except ValueError as e:
    print(e)
    # You can add additional handling or exit the script if needed.
    exit()

# Create a new icon file
icon = Image.new("RGBA", (sizes[-1][0], sizes[-1][1]))

# Resize and paste the source image into the icon file for each size
for size in sizes:
    resized_image = source_image.resize(size, Image.LANCZOS)
    offset = ((sizes[-1][0] - size[0]) // 2, (sizes[-1][1] - size[1]) // 2)
    icon.paste(resized_image, offset)

# Save the icon file
icon.save("icon.ico", format="ICO")

# Print a message if saving is successful
print("Icon file 'icon.ico' saved successfully.")