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Sylpheed/crates/sylpheed-formats
sylph-decoder a1adb17d35 re: 125 percent is not the only odd scale, and ptlogo_eff2 is a pop not a steady state
Refutes a DECISIONS claim and decodes the element the port withheld on my say-so.

The claim that title_jp s ptlogo_eff2 at 125 percent is the single drawn element
in the whole export at a scale that is not a whole multiple of 100 percent rested
on a census of PARENTS only. Opening the 45 leaves as well finds thirteen
distinct non-whole-multiple scales -- 75, 96, 99, 101, 103, 112, 125, 150, 204x208,
210x220, 250, and the 75x100 / 96x100 / 99x100 pairs -- with 125 among the rarest
at two occurrences. ptlogo1 and ptlogo2 carry 101/103/112 on the ENGLISH title
too, so it is not a Japanese-build peculiarity. The claim s real content was "the
only one the port draws", which is about the export s element set rather than the
disc.

And ptlogo_eff2 is decoded. The 125 percent lasts 57 units, about 0.95 s -- a
scale-0 to 125 to scale-0 flash between t=50 and t=107, a transient rather than a
steady state, which is why it looked anomalous in a census of resting poses. The
leaf draws at 100 percent as two superimposed copies of the same sprite at alpha
160 and 80, each rotating a full 360 degrees over 960 units: a slow double-layered
spin, 16 s per revolution.

This is exactly the case the ptloop rule could not separate. There the parent had
expired so leaf-wins and parent-ignored were indistinguishable; here the parent
carries real geometry including a scale that reaches zero twice. If parent scale
gates the leaf the spin is a 0.95 s flash; if the leaf runs on its own timeline it
spins for 16 s. Nothing on the disc chooses between them, and title_jp has no
oracle capture, so it is undecodable in this container -- the port is right to
withhold it, and the Japanese-locale capture MISSION has parked would settle it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
2026-08-29 18:16:20 +00:00
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