1 files changed, 39 insertions, 0 deletions
diff --git a/py/gamma.py b/py/gamma.py
new file mode 100644
index 0000000..69722ce
--- /dev/null
+++ b/py/gamma.py
@@ -0,0 +1,39 @@
+#!/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")