py/db.py

   1 #!/usr/bin/python3
   2
   3 import sys
   4 import pykms
   5 import selectors
   6
   7 bar_width = 20
   8 bar_speed = 8
   9
  10 class FlipHandler(pykms.PageFlipHandlerBase):
  11     def __init__(self):
  12         super().__init__()
  13         self.bar_xpos = 0
  14         self.front_buf = 0
  15         self.fb1 = pykms.DumbFramebuffer(card, mode.hdisplay, mode.vdisplay, "XR24");
  16         self.fb2 = pykms.DumbFramebuffer(card, mode.hdisplay, mode.vdisplay, "XR24");
  17
  18     def handle_page_flip(self, frame, time):
  19         if self.front_buf == 0:
  20             fb = self.fb2
  21         else:
  22             fb = self.fb1
  23
  24         self.front_buf = self.front_buf ^ 1
  25
  26         current_xpos = self.bar_xpos;
  27         old_xpos = (current_xpos + (fb.width() - bar_width - bar_speed)) % (fb.width() - bar_width);
  28         new_xpos = (current_xpos + bar_speed) % (fb.width() - bar_width);
  29
  30         self.bar_xpos = new_xpos
  31
  32         pykms.draw_color_bar(fb, old_xpos, new_xpos, bar_width)
  33
  34         if card.has_atomic():
  35             ctx = pykms.AtomicReq(card)
  36             ctx.add(crtc, "FB_ID", fb.id())
  37             ctx.commit(self)
  38         else:
  39             crtc.page_flip(fb, self)
  40
  41
  42
  43 card = pykms.Card()
  44 conn = card.get_first_connected_connector()
  45 mode = conn.get_default_mode()
  46 crtc = conn.get_current_crtc()
  47
  48 fliphandler = FlipHandler()
  49
  50 crtc.set_mode(conn, fliphandler.fb1, mode)
  51
  52 fliphandler.handle_page_flip(0, 0)
  53
  54 def readdrm(conn, mask):
  55     #print("EVENT");
  56     card.call_page_flip_handlers()
  57
  58 def readkey(conn, mask):
  59     #print("KEY EVENT");
  60     sys.stdin.readline()
  61     exit(0)
  62
  63 sel = selectors.DefaultSelector()
  64 sel.register(card.fd(), selectors.EVENT_READ, readdrm)
  65 sel.register(sys.stdin, selectors.EVENT_READ, readkey)
  66
  67 while True:
  68     events = sel.select()
  69     for key, mask in events:
  70         callback = key.data
  71         callback(key.fileobj, mask)