Sylpheed/docs/re/ui-title-build-map.md

Which GP_TITLE build is which screen — measured against the running game

Status: ✅ CONFIRMED for the four screens the boot path actually shows (title art, PRESS Ⓐ BUTTON, main menu, EXTRAS); 🟡 PROBABLE for their Japanese twins; ❔ open for the two DELTASABER plates.

Answers MISSION Q2. The previous statement — "build 4 title, 5 main menu, 6/8/9 submenus" — is partly wrong and is withdrawn: build 8 is the Japanese main menu, not a submenu, and GP_TITLE holds exactly one submenu (EXTRAS), in two languages.

The archive is eight screens, each shipped twice

GP_TITLE.pak has 16 entries; sylpheed-cli screen list calls 12 of them composable builds. The 16 fall into eight pairs, and each pair's two members have near-identical sizes and name hashes that differ by a constant — one character of the name apart:

entry	hash	bytes	build idx	pair
0	01a2db9c	483 958	0	A
1	0ff0b8a8	483 958	1	A
2	285d8849	267 014	2	B
3	369773cb	267 014	3	B
4	a60fcb85	12 278 666	4	C
7	b483e6e6	13 363 328	7	C
5	a715f485	6 977 437	5	D
8	b58a0fe6	6 931 653	8	D
6	a81c1d85	6 549 126	6	E
9	b69038e6	6 548 438	9	E
10	cdba806e	426 473	—	F
13	db2ea1f8	423 333	—	F
11	cec0a96e	999 643	—	G
14	dc34caf8	999 643	—	G
12	cf2a8ccd	1 774 639	10	H
15	dd56d99b	1 774 639	11	H

For the three pairs whose members differ visibly — C, D, E — the difference is English versus Japanese: build 7 is the title art with the katakana subtitle プロジェクト シルフィード, build 8 the main menu reading 新規 / ロード / チュートリアル / オプション / エクストラ, build 9 the EXTRAS submenu as エクストラ. That is the whole of the language split we can see. In pairs A, B and H the two members render byte-identical PNGs — the archive still carries two copies, but the artwork does not change with the language.

Pairs F and G are the four entries screen list does not classify as builds by default. They are the developer splash, and they render — see below.

The map

Contact sheet of every render: captures/title-builds/title-build-contact-sheet.png.

build	what it is	confirmed how
0, 1	a DELTASABER / SYLPHEED A.I. plate low-left on black, no background	❔ not observed running. Never seen in the boot path, the main menu, EXTRAS or MISSION SELECT
2, 3	the PRESS Ⓐ BUTTON plate — an overlay build of its own, not a state of build 4	✅ seen composited over build 4 on the live title, at the same rect our render puts it
4	title art, English (PROJECT SYLPHEED, ™, (C)2006,2007 SQUARE ENIX)	✅ live-title-press-a.png
7	the same, Japanese	🟡 renders as the JP twin of build 4; the container runs an English locale, so it was not seen
5	main menu, English: NEW GAME / LOAD GAME / TUTORIAL / OPTIONS / EXTRAS, footer Ⓐ : OK	✅ live-main-menu.png — element for element
8	the same, Japanese	🟡 as above
6	the EXTRAS submenu, English: MISSION SELECT / MOVIE THEATER / BACK, footer Ⓐ : OK Ⓑ : Back	✅ live-extras.png
9	the same, Japanese	🟡 as above
10, 11	the same DELTASABER plate as build 0, over a dark circuit-line background	❔ not observed running

✅ The splash — the four "non-build" entries, rendered

screen list --all widens the enumeration to every composable bundle and shows all 16 entries. The four that the default listing drops are the two halves of the developer splash, each shipped twice:

entry	elements / sprites	what it is
10, 13	3 / 2	the white SQUARE ENIX publisher logo
11, 14	7 / 6	GAME ARTS / SETA / studio anima — the developer logos

splash-entries-rendered.png. Rendered with screen render --all --primitives --black. Entry 11's seven elements are the three logos, their three _eff glows and the palogo_eff0.prm black backdrop — exactly the composition structures/ui-paint-order-key.md measured for the splash.

✅ Confirmed against the running game — 2026-08-28

The 🟡 above ("no framebuffer capture to diff against") is closed. Recording the boot from the moment the window appears, at 2 fps, catches the splash before the movie: live-splash-publisher.png, live-splash-developer.png.

Edge-correlated against the renders, with the other half as a negative control:

capture	vs entry 10	vs entry 11
publisher frame (t ≈ 2.0 s)	0.9146 @ (0,0)	0.027 ✗
developer frame (t ≈ 6.0 s)	−0.033 ✗	0.9792 @ (0,0)

Both halves match their own render at zero shift and are firmly rejected by the other. The 13/14 twins score 0.876 / 0.966 — near-identical artwork, so this test cannot tell a pair apart, only a screen from a different screen.

✅ The splash's timing is DECODED, and the capture confirms it

Re-recorded at 10 fps (the 2 fps pass below was ±0.5 s and could not see ramps at all). The splash fades, both ways — it does not cut — and the bundle's own keyframes say so:

$ sylpheed-cli screen info --all --build 10 GP_TITLE.pak
1  palogo_sqex.t32       7 kf  [15  30  235 239 251 255  -]
2  palogo_sqex_eff.t32   4 kf  [15  30  45  -]              (the glow, child of 1)

$ ... --build 11
1  palogo_gamearts.t32   7 kf  [15  30  190 194 206 210  -]   (seta, anima identical)
2  palogo_gamearts_eff   4 kf  [15  30  45  -]

Under Q1's 1 unit = 1/60 s:

	declared	measured at 10 fps
SQUARE ENIX ramp in	15 → 30 = 0.25 s	rise 0.4 → 0.8 s
SQUARE ENIX hold	30 → 235 = 3.42 s	≈ 3.5 s (0.8 → 4.3 s)
SQUARE ENIX fade out	235 → 255 = 0.33 s	≈ 0.3 s (4.4 → 4.7 s)
developer hold	30 → 190 = 2.67 s	≈ 2.4 s (5.6 → 8.0 s)
developer fade out	190 → 210 = 0.33 s	≈ 0.3 s (8.1 → 8.4 s)

The offset between declared and measured start is ≈ 0.35 s, which is simply that the recording's t = 0 is when the window appears, not when the guest starts drawing. Everything downstream of that lines up.

The overshoot is the glow. The measured rise peaks (6.21) at 0.8 s and settles back (5.39) by 1.1 s, which looks like a bloom. It is the _eff child element: its keyframes are 15 → 30 → 45, so it ramps in after the logo and then back down, while the logo itself holds. Decoded, not a rendering artifact.

So the port can read the splash's timing off the disc rather than author it — the first screen's animation is not a measurement it has to trust.

The wall-clock sequence, for orientation

SQUARE ENIX on screen	≈ 0.5 → 4.0 s after the window appears
black	≈ 4.5 s
GAME ARTS / SETA / studio anima	≈ 5.0 → 7.5 s
black	≈ 9.0 s
ADV.wmv begins	≈ 9.5 s

⚠️ The frames at ≈ 9.5–12.5 s show SQUARE ENIX again in cyan. That is not a third splash — it is the intro movie's own opening, which the milestone-2 notes describe as "white SQUARE ENIX + cyan glow + red diamonds". A capture-only reading would have recorded a third logo screen that does not exist.

So the first of the five screens now has a reference composite, a framebuffer capture, and its on-screen durations.

Reach of the two negatives. Builds 0/1 and 10/11 were looked for in: the whole boot sequence (a 5 s-cadence filmstrip from launch to the title, ~190 s), the title, the main menu, the EXTRAS submenu, the LOAD GAME slot list, the transition into MISSION SELECT (a 40-frame burst), and the attract cycle. They appear in none of them. The obvious remaining candidate is a long load — a mission launch — which is out of this objective's scope; they are most likely a loading/AI-chatter plate. That is a hypothesis, not a result.

Three things the captures settle beyond the map

The live title is two builds composited. Build 4 draws the art; build 2 draws PRESS Ⓐ BUTTON on top, and it fades in a beat later — a screenshot taken 2.5 s after arriving at the title has the art and no plate, one taken ~1 s later has both. The port must treat the plate as its own timed element.

The attract-loop title carries the plate too. After ~8–10 s idle the title fades to black, a full-motion video plays for ~85 s, and the title comes back — with PRESS Ⓐ BUTTON (live-attract-title-press-a-band.png). This is consistent with, and adds nothing to, the draw-quad comparison in canary-scripted-input-traps.md: the plate is not the tell that distinguishes the boot title from the attract title.

EXTRAS is the only main-menu destination inside GP_TITLE. Ⓐ on EXTRAS opens build 6 — measured. The other four destinations leave the archive: Ⓐ on LOAD GAME opened a LOAD GAME slot list, and Ⓐ on MISSION SELECT inside EXTRAS opened a MISSION SELECT screen, neither of which is a GP_TITLE build. dat/ carries GP_SAVE_LOAD.pak, GP_TUTORIAL.pak, GP_OPTIONS.pak, GP_MISSION_SELECT.pak and GP_MOVIE_THEATER.pak; that those are the archives behind the other four buttons is an inference from the names, not a measurement.

How to reproduce

sylpheed-cli screen list  "$SYLPHEED_DISC/dat/GP_TITLE.pak"
sylpheed-cli screen render --build 6 "$SYLPHEED_DISC/dat/GP_TITLE.pak" /tmp/b6.png
tools/re-capture/boot_menu.sh q2      # boots to the main menu, cursor on NEW GAME
tools/re-capture/pad.py dpad down 0.35 # x4 -> EXTRAS
tools/re-capture/pad.py tap A 0.30

Mind the d-pad hold — see METHOD.md.

✅ The title is not a still image — it loops, ≈ 2.2 s

Recording the title at 10 fps for 22 s shows the screen never settles. After the build-in it oscillates by about ±0.5 in mean luminance, continuously:

peaks at   5.6  7.8  10.0  12.7  15.2  17.1  19.2  21.3 s
intervals  2.2  2.2   2.7   2.5   1.9   2.1   2.1
                                       mean 2.24 s

measured, n = 7 intervals, spread 1.9–2.7 s — peak-picking a low-amplitude signal is coarse, so read it as ≈ 2.2 s ± 0.4, not a precise period.

The mechanism is already decoded: build 4 declares ptloop01.rat / ptloop02.rat, and loop*.rat is a looping sprite animation rather than a composition (INDEX.md, UI screen layout row). So the title carries a looping element by construction; what is new is that it runs at ≈ 2.2 s and never stops.

✅ The loop records ARE decoded — and they are not what I measured

ptloop01.rat is an opt -linked leaf record: in build 4 the chunk opt (size 0x0c) carries the name, immediately followed by a RATC blob at 0xbb5966 (ptloop02.rat the same at 0xbb5a82). Its pivot fields read 200/90, matching screen info's pivot (200,90) — the right blob.

The keyframes use the ordinary 40-byte block layout, starting at +0x68:

	ptloop01 → pteff03.t32	ptloop02 → pteff03a.t32
kf0	t=150 x=−639 α=ff	t=150 x=1721 α=00
kf1	t=540 x=−39 α=80	t=630 x=1111 α=80
kf2	t=600 x=1521 α=ff	t=720 x=−839 α=ff
scale	100 × 600	100 × 800
span	150 → 600 = 450 units = 7.5 s	150 → 720 = 570 units = 9.5 s

Y is constant at 270 and X runs off one edge to the other, so these are horizontal light sweeps — loop01 left → right, loop02 right → left.

🔴 Two things I wrote last iteration are wrong

1. "A leaf record's keyframes are not in the build's 40-byte layout." Withdrawn — they are, exactly. The scan that "found nothing" demanded 29 strictly-increasing times because I read the word at +0x004 (0x001e0000) as a keyframe count. These records hold three keyframes. A filter that hard-codes the expected count rejects the right structure; whatever the 30 is, it is not the number of keyframes here.

2. "The ≈ 2.2 s oscillation is the ptloop elements." Withdrawn — I asserted the link because build 4 declares those elements, not because anything showed it. The decoded sweeps run 7.5 s and 9.5 s. A 22 s capture would show ~3 peaks from a 7.5 s cycle; it showed 8. So the loops are not what the oscillation measured.

✅ Identified: it is the PRESS Ⓐ BUTTON plate pulsing

A per-tile amplitude map over the capture (8 × 6 grid, 18 s after build-in) localises the 2.3 s period precisely:

region	sd	dominant lag
band x ≈ 318–954, y ≈ 560–672	7.65	2.3 s
wordmark centre	0.06	—
bottom-right corner	0.003	—

That band is the PRESS Ⓐ BUTTON plate's rest position (ptbtn00.rat, rest (383,550), pivot (256,25)). It is build 2, composited over the title — not build 4.

Decoding ptbtn00f.rat, the plate's highlight variant, gives the pulse directly:

kf	t	alpha
0	6	0x00
1	29	0x06
2	35	0x4a
3	50	0x50
4	58	0x50 (hold)
5	97	0x4a
6	105	0x06

A glow that fades in to 0x50 and back out — exactly a "press start" pulse.

There is an eighth keyframe: fade 0x00ffffff at the same position — the glow returns to fully transparent, so this is a closed cycle, not a one-shot ramp.

🟡 The cycle length is still not readable — and now that is an observation. The eighth block's time slot contains the four bytes end , the record's ASCII terminator: the record simply stops there and the value does not exist. So the corpus's "a group's last block has no time of its own" rule holds here in a second form — not the next group's index, but the chunk terminator.

Declared span is ≥ 105 units = 1.75 s; measured ≈ 2.3 s (≈ 138 units), which would need a final step of ≈ 33 units. That 33 is fitted to the measurement, not read from the file, and is recorded only so nobody re-derives it as if it were a decode.

❔ The word at +0x004 is not a keyframe count. It reads 0x003c0000 (60) here with 8 keyframes, and 0x001e0000 (30) in the loop records with 3. Whatever it is, it is not the count, and it is not decoded.

❔ The declared 4.08 s build-in was not tested

That was the intent of this recording and it did not work. The title was reached by skipping the movie with Ⓐ, which cuts to black and brings the title up on a path that may not be the normal one; and the visible rise (≈ 2.7 s, from t ≈ 0.8 to 3.5) is a luminance curve, which screen-transitions.md already establishes is not the fade quad's ramp. So ≈ 2.7 s neither confirms nor contradicts build 4's declared 16 → 261 (4.08 s); the two are not measuring the same thing.

Testing it properly needs the title reached without a skip, and a way to separate the quad from the elements — neither of which this recording had.

✅ For the port: build 4 alone, and groups HOLD rather than loop

Both answers the port agent asked for, in one recording.

The capture — the title with no PRESS Ⓐ plate over it

Ⓑ from the main menu returns to the title and the plate fades in a beat later, which opens a clean window. Recorded at 20 fps from the press:

title art appears	t ≈ 1.10 s
builds in	1.10 → 3.70 s (mean 41.8 → 63.2)
settled, still no plate	3.70 → 5.00 s
plate arrives	t ≈ 5.10 s (band jumps 282 → 3 755 bright px)

live-title-build4-no-plate.png is t = 4.0 s — build 4, settled, unobstructed. That is the reference for the washed-out cyan glow slab the port reports drawing and the game not having.

✅ A keyframe group HOLDS at its last keyframe — it does not loop

This follows from the decoded sweeps plus a measurement, and the two agree:

• ptloop01.rat's final keyframe puts pteff03.t32 at x = 1521 and ptloop02.rat's puts pteff03a.t32 at x = −839 — both off-screen on a 1280-wide design. A group that holds therefore parks both sweep sprites out of view and nothing moves after the build-in.
• Measured: over 18 s of settled title the centre tiles sit at sd ≤ 0.01 (per-tile map above). A looping group would recross the screen every 7.5 s and be unmissable.

So the name loop*.rat is misleading — in this build the records animate once during the build-in and then rest off-screen. 🟡 This is about these groups on this screen; nothing here says no group anywhere loops.