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1#!/usr/bin/python3
2
3import sys
4import pykms
5import selectors
6
7bar_width = 20
8bar_speed = 8
9
10class FlipHandler():
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        self.flips = 0
18        self.frames = 0
19        self.time = 0
20
21    def handle_page_flip(self, frame, time):
22        self.flips += 1
23        if self.time == 0:
24            self.frames = frame
25            self.time = time
26
27        time_delta = time - self.time
28        if time_delta >= 5:
29            frame_delta = frame - self.frames
30            print("Frame rate: %f (%u/%u frames in %f s)" %
31                  (frame_delta / time_delta, self.flips, frame_delta, time_delta))
32
33            self.flips = 0
34            self.frames = frame
35            self.time = time
36
37        if self.front_buf == 0:
38            fb = self.fb2
39        else:
40            fb = self.fb1
41
42        self.front_buf = self.front_buf ^ 1
43
44        current_xpos = self.bar_xpos;
45        old_xpos = (current_xpos + (fb.width - bar_width - bar_speed)) % (fb.width - bar_width);
46        new_xpos = (current_xpos + bar_speed) % (fb.width - bar_width);
47
48        self.bar_xpos = new_xpos
49
50        pykms.draw_color_bar(fb, old_xpos, new_xpos, bar_width)
51
52        if card.has_atomic:
53            ctx = pykms.AtomicReq(card)
54            ctx.add(crtc.primary_plane, "FB_ID", fb.id)
55            ctx.commit()
56        else:
57            crtc.page_flip(fb)
58
59if len(sys.argv) > 1:
60    conn_name = sys.argv[1]
61else:
62    conn_name = ''
63
64card = pykms.Card()
65res = pykms.ResourceManager(card)
66conn = res.reserve_connector(conn_name)
67crtc = res.reserve_crtc(conn)
68mode = conn.get_default_mode()
69
70fliphandler = FlipHandler()
71
72crtc.set_mode(conn, fliphandler.fb1, mode)
73
74fliphandler.handle_page_flip(0, 0)
75
76def readdrm(fileobj, mask):
77    #print("EVENT");
78    for ev in card.read_events():
79        if ev.type == pykms.DrmEventType.FLIP_COMPLETE:
80            fliphandler.handle_page_flip(ev.seq, ev.time)
81
82
83def readkey(fileobj, mask):
84    #print("KEY EVENT");
85    sys.stdin.readline()
86    exit(0)
87
88sel = selectors.DefaultSelector()
89sel.register(card.fd, selectors.EVENT_READ, readdrm)
90sel.register(sys.stdin, selectors.EVENT_READ, readkey)
91
92while True:
93    events = sel.select()
94    for key, mask in events:
95        callback = key.data
96        callback(key.fileobj, mask)
97