| Age | Commit message (Collapse) | Author |
|---|
|
Closes out Phase 0 with the measurement that explains the ~30fps: a per-frame
budget breakdown and a non-blocking GPU timer query.
- GlBridge: load EXT_disjoint_timer_query (glGenQueriesEXT/Begin/End/
GetQueryObject*), gated by the GL extension string; report gpu_timer in the
bring-up line. Absent -> graceful 'n/a'.
- PresentTarget::render(ctx, RenderTimings*): time clear/update/render-submit/
present (CPU wall-clock) and bracket ctx->Render() with a 2-deep timer-query
ring read back a frame late, so the REAL GPU fill time is measured without a
glFinish stall. delete_queries in teardown.
- composite_frame: time the import+layout loop; accumulate all phases; emit a
[perf-split] line (per-rendered-frame averages) alongside [perf].
Result (headless 1080p, Haswell+crocus == CF-AX3 GPU class): CPU work ~2ms
(import 0.7 / update 0.7 / render-submit 0.8), GPU fill (ctx->Render) ~10-15ms,
present dominated by the blocking fence wait. -> fill-bound; the whole-output
composite is the wall. Damage limiting is the lever, to be built properly in
the Phase 1 compositor (not hacked into this throwaway). --verify ALL PASS,
kernel suite green.
|
|
Iterated the Phase-0 spike from "self-verified headless" to "works on the
CF-AX3": a live, 3D-tilted client window you can type into, with a visible
cursor and pointer/touch routed through the transform. Real-seat confirmed.
Safety / escape (a black-screen lockout had forced reboots):
- session escape hatch on --run (mirrors src/input.cpp): Esc + Ctrl+Alt+Backspace
quit, Ctrl+Alt+F1..F12 VT-switch, SIGINT/SIGTERM clean-terminate.
- 15s DEAD-MAN auto-exit, reset by pressing P (also a keyboard-liveness probe);
UNBOX_SPIKE_TIMEOUT overrides. Guarantees the spike can never lock the machine.
- persistent crash-survivable log at $HOME/rml-spike.log (UNBOX_SPIKE_LOG),
fflush+fsync per line (was on tmpfs /tmp -> lost on reboot); loud diagnostics
for backend/modeset/client-connect/map/import.
Black screen / no window fixes:
- present path works on real DRM+gles2 (blue bg + marker confirmed on panel);
dark-blue clear + marker rect make "empty vs not-presenting" diagnosable.
- xdg wired from new_toplevel/new_popup (was new_surface -> no role -> no
configure -> client never mapped); foot now maps as a live surface element.
- WAYLAND_DISPLAY exported so spawned clients connect.
Interactivity:
- keyboard focus enter + key forward to the focused client (was never sent
without a pre-existing keyboard device); typing reaches foot.
- visible wlr-plane cursor (xcursor theme load + set; never drawn into RmlUi).
- pointer + touch hit-tested via RmlUi pick through the 3D transform, mapped to
surface-local, forwarded via wl_seat (criterion-3 pointer confirmed at edges).
Live update loop (was frozen on frame #1):
- send wlr_surface_send_frame_done to all mapped surfaces+subsurfaces each frame
(client lives as an imported texture, not a wlr_scene node).
- re-import the surface's CURRENT buffer per commit, gated on the surface commit
SEQUENCE not the buffer pointer (foot recycles a buffer pool -> same pointer,
new contents); double-buffered wlr_buffer lock/release so the client is never
starved. reimports now track commits ~1:1 (was capped 3:1).
--verify ALL PASS (criteria 1-7), kernel suite green, build + build-asan clean.
Spike target stays build_by_default:false, out of the shipped binary.
|
|
Throwaway, self-contained spike target `packages/kernel/rml-compositing-spike`
(build_by_default:false, not in kernel_dep) proving RMLUi can composite live
client windows. `--verify` reads back the framebuffer headlessly and asserts all
7 criteria; `--run` brings up a real/nested-seat compositor for the user's
real-seat run. All 7 = ALL PASS on this dev box (an Intel Haswell-ULT iGPU on
Mesa crocus — the CF-AX3's GPU class):
1 zero-copy live dmabuf→EGLImage→GL texture sampled by RmlUi, cached (0 reimport
when buffer unchanged); 2 RCSS perspective+rotateY on the live pixels (verified
by readback); 3 screen→surface-local inversion through the 3D transform,
round-trip 0.000000 px (pure core doctested in the kernel suite); 4 surface
tree (toplevel+subsurface+popup) composited correctly → recommend
PER-SUBSURFACE elements (RTT escape-hatch for tree-spanning effects in Phase 1);
5 wallpaper (layer surface) via the identical import path; 6 idle dirty-gate =
0 renders over 120 idle turns, exactly 1 render per commit; 7 present path
FBO→dmabuf swapchain→wlr_scene_buffer with an EGL fence (no glFinish).
Crocus gotchas documented (linear modifiers, AR24 swizzle, cross-context fence,
FBO Y-flip, re-import only on new buffer). Real-seat GO/NO-GO (3D/touch feel,
frame-time @4 windows+video, idle power) is the user's call — runbook in
reports/rml-compositing-spike.md §5.
Also: GLOSSARY rows for "RML compositing" + "surface element" (user-confirmed);
tasks.md slice 13 updated to spike-complete/GO pending real-seat.
kernel suite green; full build clean; spike --verify ALL PASS.
|
