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from fractions import Fraction
from typing import Callable, Tuple
from PIL import Image, ImageEnhance
from streamdeck_ui.display.filter import Filter
class KeypressFilter(Filter):
"""This filter is applied whenever a key is being pressed"""
def __init__(self):
super(KeypressFilter, self).__init__()
self.last_time: Fraction = Fraction()
self.brightness = 1
self.dim_brightness = 0.5
self.filter_hash = hash(self.__class__)
self.active = False
self.last_state = False
def initialize(self, size: Tuple[int, int]):
self.blank_image = Image.new("RGB", size)
self.size = size
pass
def transform(self, get_input: Callable[[], Image.Image], get_output: Callable[[int], Image.Image], input_changed: bool, time: Fraction) -> Tuple[Image.Image, int]:
frame_hash = hash((self.filter_hash, self.active))
if input_changed or self.active != self.last_state:
self.last_state = self.active
image = get_output(frame_hash)
if image:
return (image, frame_hash)
input = get_input()
if self.active:
input = get_input()
background = self.blank_image.copy()
input.thumbnail((self.size[0] - 10, self.size[1] - 10), Image.ANTIALIAS)
# Reduce the image by 10px
enhancer = ImageEnhance.Brightness(input)
input = enhancer.enhance(2)
# Light it up a bit
background.paste(input, (5, 5))
# Center the image
return (background, frame_hash)
else:
return (input, frame_hash)
return (None, frame_hash)
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