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-rw-r--r--py/gamma.py13
1 files changed, 7 insertions, 6 deletions
diff --git a/py/gamma.py b/py/gamma.py
index 7ecd19d..6dfd935 100644
--- a/py/gamma.py
+++ b/py/gamma.py
@@ -19,15 +19,16 @@ pykms.draw_test_pattern(fb);
crtc.set_mode(conn, fb, mode)
-arr = bytearray(256*2*4)
+len=256
+arr = bytearray(len*2*4)
view = memoryview(arr).cast("H")
-for i in range(256):
- g = round(255 * pow(i / 255.0, 1 / 2.2))
+for i in range(len):
+ g = round(65535 * pow(i / float(len), 1 / 2.2))
- view[i * 4 + 0] = g << 8
- view[i * 4 + 1] = g << 8
- view[i * 4 + 2] = g << 8
+ 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);