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euske/setgamma.py

Created November 2, 2019 00:16
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Change an image gamma with Pygame
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setgamma.py
import pygame
def set_gamma(img, gamma):
buf = img.get_buffer()
gmap = bytes( min(255, int(255*pow(i/255, gamma))) for i in range(256) )
buf.write(buf.raw.translate(gmap), 0)
return
img = pygame.image.load("in.jpg")
set_gamma(img, 0.5)
pygame.image.save(img, "out.jpg")
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