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45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
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#!/usr/bin/env python3
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import argparse
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from decimal import Clamped
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parser = argparse.ArgumentParser(
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"backlight.py", description="Adjust backlight levels for intel backlight."
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)
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# You can either set min or max, or change some amount. Not all.
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group = parser.add_mutually_exclusive_group(required=False)
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group.add_argument(
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"change",
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type=int,
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nargs="?",
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help="The mount, as a percentage, to change the brightness by. Negative numbers lower brightness.",
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)
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group.add_argument(
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"--max", action="store_true", help="Set the brightness to max possible."
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)
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group.add_argument("--off", action="store_true", help="Set the brightness to 0.")
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def backlight(file_name: str) -> str:
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return f"/sys/class/backlight/intel_backlight/{file_name}"
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args = parser.parse_args()
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with open(backlight("max_brightness"), "r") as max_f:
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max_brightness = int(max_f.read().strip())
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with open(backlight("brightness"), "w+") as current_f:
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current_brightness = int(current_f.read().strip())
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if args.max:
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current_f.write(str(max_brightness))
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elif args.off:
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current_f.write(str(0))
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elif args.change:
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percent = int(max_brightness / 100.0)
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to = current_brightness + percent * args.change
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# Make sure number is in bounds
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# Bounding min at 1 to avoid fully shutting down screen without the off option
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to = max(min(to, max_brightness), 1)
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current_f.write(str(to))
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else:
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print(int((current_brightness / float(max_brightness)) * 100))
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