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DeeJanuzandClaude Opus 5.5
d8c2ed0c58
ft-screens gave KWin a frame callback for every committed screen on each tick, and the tick was an 11 ms timer set again after each run, so it slid through the display's frame and came about 85 times a second at 90 Hz: the desktop repeated a frame several times a second (judder in scrolling and video), and KWin drew every screen in one burst at a random point of vrcompositor's frame. Hidden screens got the same 90 Hz unless Frametop was paused for a game. - Ticks run on a timerfd at absolute times, once per display frame, 1 ms after the vsync (IVRSystem::GetTimeSinceLastVsync and the HMD's display frequency, read once a second), so KWin gets its callbacks early in the frame. Measured with --no-vr: 91 wakeups a second instead of about 85. On the Frame the vsync times SteamVR reports lie on a 90 Hz grid. - Each screen's callbacks come at a rate for how much of it you see (vr.cpp, UpdateAttention): every frame while focused (within 12 degrees of where your head points, a laser or the mouse on it in the last 1.5 s, carried, or typed on), 15 a second for the rest of what you see (within 60 degrees), and 1 a second when hidden, behind you, or paused. Levels rise at once and fall after 1.5 s (focused) or 0.5 s (in view). KWin draws a screen only after its callback and its apps wait for theirs, so this throttles the apps too. A screen where nothing changes costs nothing at any rate, as before. - A video in view keeps every frame: 8 commits in a row that each redraw 6% or more of the screen, at 10 a second or more, count as one (from the surface's buffer damage). - "rates F V H" / --rates set the three rates (default 0 15 1, 0 = every frame), "rates?" shows them and each screen's level, "watch S" gives everything full rate for S seconds for a remote viewer (vnc-bridge.sh renews it), and "phase MS" moves the ticks for tuning. - ft-screens' main thread runs at nice -5 after the session starts: SteamOS allows down to -8 once the soft RLIMIT_NICE is raised, and KWin waits on these ticks. It had spent nearly 3 times as long waiting to run as running. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
29 lines
2.1 KiB
Bash
Executable File
29 lines
2.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Build ft-screens in the dev container on the Frame (screens/build/ft-screens), and
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# ft-handtest, which tries the hand cutouts (handcut.cpp) on a test panel of its own.
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# compositor.c is the wlroots side (C; wlroots headers aren't C++), vr.cpp the OpenVR side.
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# vr.cpp needs OpenVR's IVRIPCResourceManagerClient (ImportDmabuf), which the header
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# shipped with SteamVR on the Frame predates, so the build uses the public header from
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# Valve's openvr repo (pinned; the Frame's runtime supports its interface versions).
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# keyboard.cpp draws its key labels with stb_truetype (public domain, one header, pinned).
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set -euo pipefail
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root=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
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"$root/scripts/sync.sh" >/dev/null
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exec "$root/scripts/frame.sh" -C screens 'set -e; mkdir -p build/include
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openvr=v2.15.6
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[ -f build/include/openvr-$openvr ] || { curl -fsSL "https://raw.githubusercontent.com/ValveSoftware/openvr/$openvr/headers/openvr.h" -o build/include/openvr.h && touch build/include/openvr-$openvr; }
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stb=2c980bb59875b0d32144a71867fbdebb2f77cd20
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[ -f build/include/stb-$stb ] || { curl -fsSL "https://raw.githubusercontent.com/nothings/stb/$stb/stb_truetype.h" -o build/include/stb_truetype.h && touch build/include/stb-$stb; }
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gcc -std=c11 -O2 -Wall -Wno-unused-parameter -c -o build/compositor.o compositor.c \
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$(pkg-config --cflags wlroots-0.20 wayland-server xkbcommon libdrm pixman-1)
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cxx="g++ -std=c++17 -O2 -Wall -Wno-missing-field-initializers -Ibuild/include $(pkg-config --cflags egl glesv2 gbm libdrm)"
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$cxx -c -o build/vr.o vr.cpp
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$cxx -c -o build/keyboard.o keyboard.cpp
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$cxx -c -o build/handcut.o handcut.cpp
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$cxx -c -o build/handtest.o handtest.cpp
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vrlibs="$(pkg-config --libs egl glesv2 gbm) -L/opt/steamvr/bin/linuxarm64 -lopenvr_api -Wl,-rpath,/opt/steamvr/bin/linuxarm64"
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g++ -o build/ft-screens build/compositor.o build/vr.o build/keyboard.o build/handcut.o \
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$(pkg-config --libs wlroots-0.20 wayland-server xkbcommon pixman-1) $vrlibs
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g++ -o build/ft-handtest build/handtest.o build/handcut.o $vrlibs
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echo "built build/ft-screens build/ft-handtest"'
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