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#!/usr/bin/python3
import pykms
from helpers import *
# This hack makes drm initialize the fbcon, setting up the default connector
card = pykms.Card()
card = 0
card = pykms.Card()
conn = card.get_first_connected_connector()
mode = conn.get_default_mode()
crtc = conn.get_current_crtc()
arr = bytearray(256*2*4)
view = memoryview(arr).cast("H")
for i in range(256):
g = round(255 * pow(i / 255.0, 1 / 2.2))
view[i * 4 + 0] = g << 8
view[i * 4 + 1] = g << 8
view[i * 4 + 2] = g << 8
view[i * 4 + 3] = 0
gamma = pykms.Blob(card, arr);
set_props(crtc, {
"GAMMA_LUT": gamma.id,
})
input("press enter to remove gamma\n")
set_props(crtc, {
"GAMMA_LUT": 0,
})
input("press enter to exit\n")
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