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#!/usr/bin/python3
import sys
import pykms
def ctm_to_blob(ctm, card):
len=9
arr = bytearray(len*8)
view = memoryview(arr).cast("I")
for x in range(len):
i, d = divmod(ctm[x], 1)
if i < 0:
i = -i
sign = 1 << 31
else:
sign = 0
view[x * 2 + 0] = int(d * ((2 ** 32) - 1))
view[x * 2 + 1] = int(i) | sign
#print("%f = %08x.%08x" % (ctm[x], view[x * 2 + 1], view[x * 2 + 0]))
return pykms.Blob(card, arr);
if len(sys.argv) > 1:
conn_name = sys.argv[1]
else:
conn_name = ""
card = pykms.Card()
res = pykms.ResourceManager(card)
conn = res.reserve_connector(conn_name)
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)
input("press enter to set normal ctm\n")
ctm = [ 1.0, 0.0, 0.0,
0.0, 1.0, 0.0,
0.0, 0.0, 1.0 ]
ctmb = ctm_to_blob(ctm, card)
crtc.set_prop("CTM", ctmb.id)
input("press enter to set new ctm\n")
ctm = [ 0.0, 1.0, 0.0,
0.0, 0.0, 1.0,
1.0, 0.0, 0.0 ]
ctmb = ctm_to_blob(ctm, card)
crtc.set_prop("CTM", ctmb.id)
print("r->b g->r b->g ctm active\n")
input("press enter to set new ctm\n")
ctm = [ 0.0, 0.0, 1.0,
1.0, 0.0, 0.0,
0.0, 1.0, 0.0 ]
ctmb = ctm_to_blob(ctm, card)
crtc.set_prop("CTM", ctmb.id)
input("r->g g->b b->r ctm active\n")
input("press enter to turn off the crtc\n")
crtc.disable_mode()
input("press enter to enable crtc again\n")
crtc.set_mode(conn, fb, mode)
input("press enter to remove ctm\n")
crtc.set_prop("CTM", 0)
input("press enter to exit\n")
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