├── README.md
└── light_changer.py


/README.md:
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 1 | ## Introduction:
 2 | This is a simple python program that changes the color of my Lifx A19 bulb to the 
 3 | color on my screen.
 4 | 
 5 | ## Usage:
 6 | Currently this program only works for lifx bulbs and linux. However, if your lightbulb 
 7 | has an api, it shouldn't be too hard to configure it. I'm using pyscreenshot to take 
 8 | a screenshot of a single pixel to find its color, but on other OSes other python modules 
 9 | can be used. Finally, if the one pixel sample is too small, experimenting with ColorThief
10 | can make it easier to grab the dominant color from an image. Use Ctrl+C to stop the program.
11 | 
12 | ## Demo:
13 | ![GeometryDash](https://user-images.githubusercontent.com/37674516/82279834-6f80b100-995b-11ea-9344-ab22306bae63.gif)
14 | 


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/light_changer.py:
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 1 | """
 2 | A simple python program to allow for setting color of a WiFi connected light to the current color on screen.
 3 | 
 4 | Author: David Chen
 5 | """
 6 | 
 7 | 
 8 | import requests
 9 | import pyscreenshot as ImageGrab
10 | 
11 | # Configs
12 | # smaller screenshot region -> faster screenshot and faster dominant color determination
13 | SCREENSHOT_REGION = (940, 520, 980, 560)  # coordinates of top left and bottom right of rectangle: (x1, y1, x2, y2)
14 | # enabling USE_COLORTHIEF will provide better results but will run slightly slower
15 | USE_COLORTHIEF = True  # if True, uses ColorThief to grab dominant color, otherwise just use top left pixel color
16 | 
17 | 
18 | def get_color(region, colorthief=True):
19 |     """ Screenshot a portion of the screen and return the rgb tuple of the most dominant color """
20 |     im = ImageGrab.grab(bbox=SCREENSHOT_REGION, backend='mss', childprocess=False)
21 |     if colorthief:  # use ColorThief module to grab dominant color from screenshot region
22 |         from colorthief import ColorThief
23 |         im.save('screenshot.png')
24 |         color_thief = ColorThief('screenshot.png')
25 |         color = color_thief.get_color(quality=1)  # dominant color
26 | 
27 |     else:
28 |         color = im.getpixel((0, 0))  # return color of top left pixel of region
29 |     
30 |     return color
31 | 
32 | 
33 | def set_light_color(color):
34 |     """ Set lifx light color to provided rgb tuple """
35 |     if sum(color) <= 30:  # color is very dark, basically black
36 |         color = (0, 0, 100)  # set color to blue since this is the closest to darkness
37 | 
38 |     rgb = 'rgb:' + ','.join(map(str, color))  # convert (r, g, b) -> rgb:r,g,b
39 | 
40 |     token = "API TOKEN HERE"
41 | 
42 |     headers = {
43 |         "Authorization": "Bearer %s" % token,
44 |     }
45 | 
46 |     # brightness can be set to any value from 0.0 to 1.0, or the line can be removed
47 |     # not always setting max brightness gives greater color accuracy; however, some colors can be pretty dim
48 |     payload = {
49 |         "color": rgb,
50 |         "duration": 0.4,
51 |         "brightness": 1.0,
52 |     }
53 | 
54 |     response = requests.put('https://api.lifx.com/v1/lights/all/state', data=payload, headers=headers)
55 |     return response
56 | 
57 | 
58 | if __name__ == '__main__':
59 |     prev_color = (0, 0, 0)
60 |     while True:
61 |         try:
62 |             color = get_color(SCREENSHOT_REGION, colorthief=USE_COLORTHIEF)
63 |             if color != prev_color:
64 |                 set_light_color(color)
65 |                 prev_color = color
66 |         except KeyboardInterrupt:
67 |             set_light_color((255, 255, 255))  # reset light to max brightness after stopping program
68 |             break
69 | 


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