2b06c68412
The wrapper takes the xenia window's geometry from `xwininfo -root -children` and crops the game surface out of it. Two things are wrong with that here, and neither errors: * `-children` lists only DIRECT children of the root, and openbox reparents the game window — so the real one is not in that list at all; * the app owns more than one window of class "xenia_canary" — an off-screen 10x10 helper as well as the 1280x745 game window — so `head -1` picked the 10x10 one. Every grab came back a 10-pixel sliver, and nothing failed: `screen_id.py` happily classified the sliver, the movie-skip heuristic fired on its noise, and a whole session's worth of screen ids were meaningless. It also drove a stray tap into the title screen's save-data probe, which crashed the guest. Walk the full tree and take the largest xenia window by area, using its absolute geometry (a reparented window's own +X+Y is relative to its frame).
63 lines
3.0 KiB
Bash
Executable File
63 lines
3.0 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Grab the GAME's image, not the emulator window.
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#
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# Every pixel oracle in this toolkit (at_menu, at_title, wait_not_black, the
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# HUD readers) was measured against a bare 1280x720 game image. xenia's window
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# is a GTK window with a menu bar, so the game surface actually starts ~25 px
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# down — and when it does, all of those constants read the wrong pixels. That
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# is not a hypothetical: a run sat on a plainly visible MAIN MENU for 300 s
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# reporting "no main menu", and a later one missed the title screen entirely and
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# let the attract movie loop for ten minutes.
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#
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# The offset is not guessed: it is the xenia window's height minus 720. So this
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# works whether or not the menu bar is there, and needs no per-display constant.
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# Put this directory first on PATH and existing scripts keep working unchanged.
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set -u
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REAL=/usr/local/bin/screenshot
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OUT="${1:-}"
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if [ -z "$OUT" ]; then
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dir="${HOME:-/tmp}/shots"; mkdir -p "$dir"
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n_file="$dir/.counter"; n=$(( $(cat "$n_file" 2>/dev/null || echo 0) + 1 )); echo "$n" > "$n_file"
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OUT="$dir/shot-$(printf '%04d' "$n").png"
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fi
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RAW="$(mktemp /tmp/shot-raw-XXXXXX.png)"
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trap 'rm -f "$RAW"' EXIT
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"$REAL" "$RAW" >/dev/null || exit 1
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# "…": ("xenia_canary" "Xenia_canary") 1280x745+1+20 +1+45
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#
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# TWO traps here, both measured (2026-08-18):
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# * `-children` only lists DIRECT children of the root, and openbox reparents
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# the game window, so the real one is not there at all;
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# * this app owns more than one window with the class "xenia_canary" — an
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# off-screen 10x10 helper as well as the 1280x745 game window — so `head -1`
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# picked the 10x10 one and every grab came back a 10-pixel sliver. Nothing
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# errored: the pixel oracles simply classified the sliver, and a whole
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# session's screen ids were noise.
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# So walk the full tree and take the LARGEST xenia window, by area. Use the
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# trailing ABSOLUTE geometry (the second +X+Y), because a reparented window's
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# own +X+Y is relative to its frame.
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geo=$(xwininfo -root -tree 2>/dev/null \
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| grep '"xenia_canary"' \
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| grep -oE '[0-9]+x[0-9]+\+-?[0-9]+\+-?[0-9]+[[:space:]]+\+-?[0-9]+\+-?[0-9]+' \
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| awk '{ split($1, g, /[x+]/); a = g[1] * g[2];
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if (a > best) { best = a; split($2, p, /\+/);
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out = g[1] "x" g[2] "+" p[2] "+" p[3] } }
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END { if (best) print out }')
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if [ -z "$geo" ]; then # no window found — hand back the raw grab
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cp "$RAW" "$OUT"; echo "$OUT"; exit 0
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fi
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W=${geo%%x*}; rest=${geo#*x}; H=${rest%%+*}; rest=${rest#*+}; X=${rest%%+*}; Y=${rest#*+}
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OFF=$(( H - 720 )); [ "$OFF" -lt 0 ] && OFF=0
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TOP=$(( Y + OFF ))
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[ "$TOP" -lt 0 ] && TOP=0
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if [ "$OFF" -eq 0 ] && [ "$TOP" -eq 0 ] && [ "$X" -eq 0 ]; then
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cp "$RAW" "$OUT"; echo "$OUT"; exit 0
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fi
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# Height is whatever is still on screen: a 1280x745 window on a 720-high root
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# loses its last rows, and every oracle point in use sits well above them.
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convert "$RAW" -crop "${W}x720+${X}+${TOP}" +repage "$OUT" 2>/dev/null \
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|| cp "$RAW" "$OUT"
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echo "$OUT"
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