report.go RawHistoryFolder

1package drm
2
3import (
4	"maps"
5
6	"github.com/bnema/neferwl/internal/ports"
7)
8
9// Reports to wayland: what the output shows and has read.
10
11// report queues what the output shows and has read, so replaced client
12// buffers can be released (see presented.Queue for merging).
13func (o *Output) report(flip *ports.FlipInfo, seen map[ports.WindowID]uint64) {
14	o.capped = false
15	var reads map[ports.WindowID]uint64
16	if o.capHidden != nil {
17		seen, reads, o.capped = o.capHidden(seen)
18	}
19	if o.reports.Push(ports.OutputPresented{Output: o.conn.name, Flip: flip, Shown: o.shown, Queued: o.queued, Seen: seen, ChildReads: reads}) {
20		o.log.Warn().Str("connector", o.conn.name).Msg("wayland is not reading output reports; flips merged")
21	}
22}
23
24// shownBy returns an immutable snapshot of the content Seq of drawn windows.
25// The scratch map is private to the output; a snapshot may still be read by
26// wayland after a subsequent flip, so never refill a previously sent map.
27func (o *Output) shownBy(s ports.Scene, seen map[ports.WindowID]uint64) map[ports.WindowID]uint64 {
28	if o.showsScratch == nil {
29		o.showsScratch = make(map[ports.WindowID]uint64)
30	}
31	clear(o.showsScratch)
32	for id, seq := range seen {
33		if s.Shows(id) {
34			o.showsScratch[id] = seq
35		}
36	}
37	if !maps.Equal(o.showsSnapshot, o.showsScratch) {
38		o.showsSnapshot = maps.Clone(o.showsScratch)
39	}
40	return o.showsSnapshot
41}
42
43func (o *Output) directShownBy(id ports.WindowID, seq uint64) map[ports.WindowID]uint64 {
44	if len(o.directShowsSnapshot) != 1 || o.directShowsSnapshot[id] != seq {
45		o.directShowsSnapshot = map[ports.WindowID]uint64{id: seq}
46	}
47	return o.directShowsSnapshot
48}