A very simple image editor. It probably doesn't make sense to anyone but me, but here it is nonetheless.

Run it with LÖVE [https://love2d.org], pipe a PNG file in stdin and redirect stdout to where you want to save the resulting file.

• Draw lines by simply holding the left mouse button. Lines are automatically smoothed.
  • Hold shift before starting a line and it'll be straight instead.
  • Hold ctrl while drawing a straight line and it'll snap to 22.5°.
• Scroll your mouse wheel to change the size of the line you're drawing.
• Hold the right mouse button to activate the color wheel, release to choose a color.
• Hold the mouse wheel to highlight and pick a color from the image.
• Press return and type anything to add some text! Mouse wheel changes font size, return again adds the text wherever the pointer is.
• Press c to enter cropping mode:
  • Click and drag to select a rectangle to crop
  • Arrows move the rectangle around, alt+arrows resize it; shift accelerates both operations
  • return finalizes the crop and resizes the image.
• Escape cancels any ongoing operation (drawing a line, cropping, picking a color either way, writing text).
• Ctrl+Z undoes the last operation. The buffer is unending.
• Ctrl+Y redoes the last undone operation. The buffer is still unending. Note that doing anything after undoing will prevent you from redoing.
  • Honestly looking for feedback on that; it'd be trivial not to, but it feels counterintuitive.
• Holding space displays some additional information:
  • While drawing a line or not doing anything, it'll draw a horizontal and a vertical line spanning the screen centered on the mouse pointer for alignment purposes.
  • While cropping, it will show the new viewport size and current margins.
• I probably forgot something.

There is literally no UI to speak of. I don't think a screenshot would mean anything.

• Drawing rectangles
• Making a better color picker
• Open an issue if you, somehow, end up using this and would like to see a feature. Or even if you just end up using it.