add eyedropper example

[HerbFargus]

This is just a quick example to create a real-time eyedropper where the LEDs on the blinkt reflect the rgb value at the mouse cursor. I'm sure it could be optimised but thought I'd put it out there for anyone interested.

quick video in action:

Dependencies:

• pillow > 7.1 (I used pip3 install --user pillow==8.1.0)
• pyautogui

pillow and pyautogui depend on x to work, so won't work directly on the framebuffer eg doesn't work on retropie.

Tested and working on my Raspberry Pi 4 on the latest Buster Desktop Raspberry Pi OS (2021-01-11)

[druck-pexip]

Nice. If you could separate the blinkt LEDs and evenly space them around the back of the screen, you could do a DIY Philips ambilight™

[HerbFargus]

Nice. If you could separate the blinkt LEDs and evenly space them around the back of the screen, you could do a DIY Philips ambilight™

This is actually a derivative result of my attempts to do just that, but since as far as I can tell the blinkt module isn't directly supported with hyperion, I cobbled together something like this but the code isn't really up to snuff for inclusion in this repo.

[Gadgetoid]

Aaaagh lured into thinking that GitHub's "Update Branch" feature would actually do something sensible. Grumble.

Hopefully the tests should actually run now. This example looks ace- cool trick!

[coveralls]

Pull Request Test Coverage Report for Build 799118883

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 74.026%

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Totals
Change from base Build 799118446:	0.0%
Covered Lines:	57
Relevant Lines:	77

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💛 - Coveralls

[Gadgetoid]

Thank you- I can't actually locate a Blinkt! to try this out with, but it runs-

May be worth noting somewhere that a very up-to-date version of PIL/Pillow is required. I had to python3 -m pip install pillow --upgrade to replace the python3-pip apt version.