| #!/usr/bin/python3 |
| |
| import pykms |
| |
| # 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); |
| |
| crtc.set_prop("GAMMA_LUT", gamma.id) |
| |
| input("press enter to remove gamma\n") |
| |
| crtc.set_prop("GAMMA_LUT", 0) |
| |
| input("press enter to exit\n") |
