Displaying Images with Transparency

Comments

• sebastiaan

  November 2021

  Hi @joelsolo99 ,

  Yes, that's possible. If the transparency is already in the images (i.e. there's an alpha layer), than it's just a matter of showing the images on a sketchpad .

  If you want to vary the transparency programmatically, then you can do that too, at least in Python (for the desktop). Let's say that you have an image file called einstein.png in the file pool. You can then set the transparency to 50% and save the resulting image as einstein-with-transparency.png like so:

  import os
  from PIL import Image
  
  src = pool['einstein.png']
  dst = os.path.join(pool.folder(), 'einstein-with-transparency.png')
  transparency = .5  # 0 = fully transparent
  
  im = Image.open(src)
  im.putalpha(int(255 * transparency))
  im.save(dst)
  

  Once you've done that, you can simply show einstein-with-transparency.png using a sketchpad . Do make sure that the image is created before the sketchpad is prepared!

  I'm not sure how to do this in JavaScript right now. It's probably possible, but will involve a bit of hacking.

  — Sebastiaan

  
  
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