toyz/glitch

A port of sug0/go-glitch

Glitch

This is a simple port of https://github.com/sug0/go-glitch to rust.

What is the deal with the expressions?

You can think of the image as a functor that you map an expression to, for each pixel's component colors, returning a new one. The allowed operators are:

Custom operators

• t a pixel made up of a random color component from the neighboring 16 pixels
• g a pixel made up of a random color component from random locations in the image
• r{Num} a pixel made up of a random color component from the neighboring Num pixels
• R{Num} the red color component defined by Num (i.e. R255 is the same as R)
• G{Num} the green color component defined by Num (i.e. G255 is the same as G)
• B{Num} the blue color component defined by Num (i.e. B255 is the same as B)

Ported from go-glitch

• + plus
• - minus
• * multiplication
• / division
• % modulo
• # power of operator
• & bit and
• | bit or
• : bit and not
• ^ bit xor
• < bit left shift
• > bit right shift
• ? returns 255 if left side is greater otherwise 0
• @ attributes a weight in the range [0, 255] to the value on the left

The expressions are made up of operators, numbers, parenthesis, and a set of parameters:

• c the current value of each pixel component color
• b the blurred version of c
• h the horizontally flipped version of c
• v the vertically flipped version of c
• d the diagonally flipped version of c
• Y the luminosity, or grayscale component of each pixel
• N a noise pixel (i.e. a pixel where each component is a random value)
• R the red color (i.e. rgb(255, 0, 0))
• G the green color (i.e. rgb(0, 255, 0))
• B the blue color (i.e. rgb(0, 0, 255))
• s the value of each pixel's last saved evaluated expression
• r a pixel made up of a random color component from the neighboring 8 pixels
• e the difference of all pixels in a box, creating an edge-like effect
• x the current x coordinate being evaluated normalized in the range [0, 255]
• y the current y coordinate being evaluated normalized in the range [0, 255]
• H the highest valued color component in the neighboring 8 pixels
• L the lowest valued color component in the neighboring 8 pixels

Examples

• 128 & (c - ((c - 150 + s) > 5 < s))
• (c & (c ^ 55)) + 25
• 128 & (c + 255) : (s ^ (c ^ 255)) + 25

glitch's Issues

Add examples

README needs a few good examples. I feel like you have some really good ones already done. But maybe show the before:after with the expression/command that produced it?

feat: Display image in the terminal if available

Kitty + wezterm + wayst all support this, I'm working on a rust library to implement kitty's Terminal Graphics Protocol, so ideally we can use that and render images directly in the terminal. We can fall back on opening the image with the default OS application

feat: loading bar/spinner for GIF output

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