I have been working on a project that can display images that have been encoded from this site in the SPIFFY (Scratch Pen Image Format For You) Format. I thought that I would post this in the Advanced Topics so I could try to explain how the format works and get feedback on it.

How it works

A SPIFFY code is a base 36 (I'll explain why later) encoded string that contains pairs of base six numbers formatted in the following way.

• 2 base six pairs denoting image width and height (this is why images are capped to 36x36).
  
• 4 digit base six number that denote the number of colors in the image.
  
• Sets of 10 digit base six numbers that denote "Set pen color to " values
  
• List of 1-4 (based on number of colors) digit base six number that denotes the index in the color list to use for the current pixel.
  

Any tips, feedback, suggestions?

Can you remove the letters c, s, and 8 from the encoding? If you don't, the strings could contain swears or forbidden 1800s. (F has a c, S has an s, A has two ss, and C has a c.)

CatIsFluffy wrote:

Can you remove the letters c, s, and 8 from the encoding? If you don't, the strings could contain swears or forbidden 1800s. (F has a c, S has an s, A has two ss, and C has a c.)

Unfortunately, this is easier said than done. If you want this, you can try to remix the Scratch project and fork the Codepen to make the change yourself.

So you can't make a program to convert c into !, s into #, and 8 into %?

Why don't you like 1,800?

CatIsFluffy wrote:

So you can't make a program to convert c into !, s into #, and 8 into %?

You'd have to do OCR on the image, but the strings are too long to put in the comments anyway.

Scratch's filters dislike 1800 (last time I checked). Also, OCR on the image? I was talking about changing the alphabet of SPIFFY.

CatIsFluffy wrote:

Also, OCR on the image? I was talking about changing the alphabet of SPIFFY.

Oh! xD That makes more sense.