1 files changed, 41 insertions, 0 deletions
diff --git a/py/tests/gamma.py b/py/tests/gamma.py
new file mode 100755
index 0000000..a6b68cc
--- /dev/null
+++ b/py/tests/gamma.py
@@ -0,0 +1,41 @@
+#!/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()
+res = pykms.ResourceManager(card)
+conn = res.reserve_connector()
+crtc = res.reserve_crtc(conn)
+mode = conn.get_default_mode()
+
+fb = pykms.DumbFramebuffer(card, mode.hdisplay, mode.vdisplay, "XR24");
+pykms.draw_test_pattern(fb);
+
+crtc.set_mode(conn, fb, mode)
+
+len=256
+arr = bytearray(len*2*4)
+view = memoryview(arr).cast("H")
+
+for i in range(len):
+    g = round(65535 * pow(i / float(len), 1 / 2.2))
+
+    view[i * 4 + 0] = g
+    view[i * 4 + 1] = g
+    view[i * 4 + 2] = g
+    view[i * 4 + 3] = 0
+
+gamma = pykms.Blob(card, arr);
+
+set_prop(crtc, "GAMMA_LUT", gamma.id)
+
+input("press enter to remove gamma\n")
+
+set_prop(crtc, "GAMMA_LUT", 0)
+
+input("press enter to exit\n")