Re: xorpng

Stefan Claas <pollux@tilde.club> wrote:

Chris M. Thomasson wrote:

On 1/4/2025 2:10 PM, Stefan Claas wrote:

Chris M. Thomasson wrote:
 

Now, for some fun wrt floating point issues... Have you messed around
with storing data in the n-ary roots of complex numbers? they can
actually create interesting renderings using real user data.
 
https://groups.google.com/g/comp.lang.c++/c/bB1wA4wvoFc/m/ozDpUBlTAAAJ
 
When you get really bored! ;^)

 
Well, I no longer do Computer Graphics, with formulas, like for fractals
etc. , or 3D CGI and 3D printing. Not sure if I ever will return to that.
 
The only interests with graphics is, when it comes to encryption/decryption
images.
 

 
Keep in mind that you can turn any "bag of bytes" into an image.

 
Well, yes ... (see my file2png program) but it is IMHO tricky to do
image encryption/decryption of .png images, or not?

If the encryption/decryption program treats its input as just a byte
stream to be encrypted/decrypted, then it is trivial to encrypt/decrypt
any file format.

If instead you mean some kind of "special, PNG aware, encryptor that
only encrypted the bitmap data of a PNG", but left the file as
otherwise a proper PNG image structure, then that is slightly tricky
(and an algorithm that is only useful for PNG's alone).