Files
Sylpheed/docs/re/data/paint-order-tie-pixel-cost.txt
sylph-decoder ae42f7f850 re: the paint-order tie-break costs the port zero pixels, not 24 pairs
The census bounded WHERE a wrong tie-break could show and said outright that
nobody had measured how many of those pairs change a pixel. Measured.

`compose_with_order` renders a bundle in a caller-supplied order; the new
example renders each screen twice, once derived and once with one tied pair
swapped, and diffs. Same-key elements are contiguous under a stable sort on
(key, i), so a swap paints nothing else in between.

Controlled per entry: swapping an OVERLAPPING pair with DIFFERENT keys moves
36 305 to 771 479 px (max delta 254). Where no such pair is drawn the output
says so rather than reporting an uninterpretable zero.

* EXTRAS (entries 6/9) and the main menu (5/8): 0 px. The tied ptframe pairs
  ink ~3 600 px each and share NONE of them -- the 102x132 rect overlap was an
  artefact of approximating an element as pivot x 2. Blend-independent.
* Across all 31 drawable overlapping tied pairs in GP_TITLE, the largest change
  any of them makes to any channel is 3/255.
* Withdrawn: "a wrong tie-break can be wrong by a whole layer". That rested on
  ptlogo_back2eff5 geometrically containing two other glows. Rendered, the swap
  moves 6 390 px by max delta 2. Containment is not occlusion when the container
  is a near-transparent glow, and nobody had rendered it before asserting it.

Reach: this measures our compositor's sensitivity to order, not the game's. The
zero-shared-ink results hold under any per-pixel blend; the delta<=3 figures
assume ours.

13 disc-gated ui_paint_order_disc tests and 114 lib tests pass unchanged.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
2026-08-29 14:47:19 +00:00

126 lines
17 KiB
Plaintext

# tie-break pixel cost — /disc/dat/GP_TITLE.pak
entry 0 7 elements 1 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL UNAVAILABLE: no overlapping different-key pair is drawn
[default (what `screen render` draws)] [5] pgloading_eff01.t32 x [6] pgloading_eff02.t32 (key 49408): 1761 px differ (0.1911% of frame), max Δ 1 | ink 30864 / 21163 px, shared 3298 px
[everything on (focus+animated+primitives)] CONTROL ok: swapping [4] pgloading_loop4.rat x [6] pgloading_eff02.t32 moves 3654 px (max Δ 23)
[everything on (focus+animated+primitives)] [5] pgloading_eff01.t32 x [6] pgloading_eff02.t32 (key 49408): 1610 px differ (0.1747% of frame), max Δ 1 | ink 29173 / 21017 px, shared 3139 px
entry 1 7 elements 1 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL UNAVAILABLE: no overlapping different-key pair is drawn
[default (what `screen render` draws)] [5] pgloading_eff01.t32 x [6] pgloading_eff02.t32 (key 49408): 1761 px differ (0.1911% of frame), max Δ 1 | ink 30864 / 21163 px, shared 3298 px
[everything on (focus+animated+primitives)] CONTROL ok: swapping [4] pgloading_loop4.rat x [6] pgloading_eff02.t32 moves 3654 px (max Δ 23)
[everything on (focus+animated+primitives)] [5] pgloading_eff01.t32 x [6] pgloading_eff02.t32 (key 49408): 1610 px differ (0.1747% of frame), max Δ 1 | ink 29173 / 21017 px, shared 3139 px
entry 4 24 elements 13 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL ok: swapping [10] pteff04.t32 x [18] ptlogo_back2eff5.t32 moves 36305 px (max Δ 254)
[default (what `screen render` draws)] [2] ptlogo1.t32 x [4] ptlogo1.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [3] ptlogo2.t32 x [5] ptlogo2.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [11] ptloop01.rat x [12] ptloop02.rat (key 32784): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [14] ptlogo_back2eff1.t32 x [15] ptlogo_back2eff2.t32 (key 32899): 295 px differ (0.0320% of frame), max Δ 1 | ink 2483 / 6547 px, shared 2483 px
[default (what `screen render` draws)] [14] ptlogo_back2eff1.t32 x [16] ptlogo_back2eff3.t32 (key 32899): 861 px differ (0.0934% of frame), max Δ 2 | ink 2483 / 9698 px, shared 2483 px
[default (what `screen render` draws)] [14] ptlogo_back2eff1.t32 x [17] ptlogo_back2eff4.t32 (key 32899): 1555 px differ (0.1687% of frame), max Δ 2 | ink 2483 / 13926 px, shared 2483 px
[default (what `screen render` draws)] [14] ptlogo_back2eff1.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 6645 px differ (0.7210% of frame), max Δ 3 | ink 2483 / 22834 px, shared 2398 px
[default (what `screen render` draws)] [15] ptlogo_back2eff2.t32 x [16] ptlogo_back2eff3.t32 (key 32899): 420 px differ (0.0456% of frame), max Δ 1 | ink 6547 / 9698 px, shared 6547 px
[default (what `screen render` draws)] [15] ptlogo_back2eff2.t32 x [17] ptlogo_back2eff4.t32 (key 32899): 1209 px differ (0.1312% of frame), max Δ 2 | ink 6547 / 13926 px, shared 6547 px
[default (what `screen render` draws)] [15] ptlogo_back2eff2.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 6641 px differ (0.7206% of frame), max Δ 2 | ink 6547 / 22834 px, shared 6360 px
[default (what `screen render` draws)] [16] ptlogo_back2eff3.t32 x [17] ptlogo_back2eff4.t32 (key 32899): 584 px differ (0.0634% of frame), max Δ 1 | ink 9698 / 13926 px, shared 9698 px
[default (what `screen render` draws)] [16] ptlogo_back2eff3.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 6390 px differ (0.6934% of frame), max Δ 2 | ink 9698 / 22834 px, shared 9462 px
[default (what `screen render` draws)] [17] ptlogo_back2eff4.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 5516 px differ (0.5985% of frame), max Δ 1 | ink 13926 / 22834 px, shared 13480 px
[everything on (focus+animated+primitives)] CONTROL ok: swapping [10] pteff04.t32 x [18] ptlogo_back2eff5.t32 moves 860461 px (max Δ 254)
[everything on (focus+animated+primitives)] [2] ptlogo1.t32 x [4] ptlogo1.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[everything on (focus+animated+primitives)] [3] ptlogo2.t32 x [5] ptlogo2.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[everything on (focus+animated+primitives)] [11] ptloop01.rat x [12] ptloop02.rat (key 32784): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
[everything on (focus+animated+primitives)] [14] ptlogo_back2eff1.t32 x [15] ptlogo_back2eff2.t32 (key 32899): 280 px differ (0.0304% of frame), max Δ 1 | ink 2516 / 6589 px, shared 2516 px
[everything on (focus+animated+primitives)] [14] ptlogo_back2eff1.t32 x [16] ptlogo_back2eff3.t32 (key 32899): 811 px differ (0.0880% of frame), max Δ 2 | ink 2516 / 9754 px, shared 2516 px
[everything on (focus+animated+primitives)] [14] ptlogo_back2eff1.t32 x [17] ptlogo_back2eff4.t32 (key 32899): 1527 px differ (0.1657% of frame), max Δ 2 | ink 2516 / 14072 px, shared 2516 px
[everything on (focus+animated+primitives)] [14] ptlogo_back2eff1.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 6586 px differ (0.7146% of frame), max Δ 3 | ink 2516 / 22970 px, shared 2419 px
[everything on (focus+animated+primitives)] [15] ptlogo_back2eff2.t32 x [16] ptlogo_back2eff3.t32 (key 32899): 395 px differ (0.0429% of frame), max Δ 1 | ink 6589 / 9754 px, shared 6589 px
[everything on (focus+animated+primitives)] [15] ptlogo_back2eff2.t32 x [17] ptlogo_back2eff4.t32 (key 32899): 1204 px differ (0.1306% of frame), max Δ 2 | ink 6589 / 14072 px, shared 6589 px
[everything on (focus+animated+primitives)] [15] ptlogo_back2eff2.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 6567 px differ (0.7126% of frame), max Δ 2 | ink 6589 / 22970 px, shared 6397 px
[everything on (focus+animated+primitives)] [16] ptlogo_back2eff3.t32 x [17] ptlogo_back2eff4.t32 (key 32899): 599 px differ (0.0650% of frame), max Δ 1 | ink 9754 / 14072 px, shared 9754 px
[everything on (focus+animated+primitives)] [16] ptlogo_back2eff3.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 6333 px differ (0.6872% of frame), max Δ 2 | ink 9754 / 22970 px, shared 9512 px
[everything on (focus+animated+primitives)] [17] ptlogo_back2eff4.t32 x [18] ptlogo_back2eff5.t32 (key 32899): 5427 px differ (0.5889% of frame), max Δ 1 | ink 14072 / 22970 px, shared 13620 px
entry 5 16 elements 2 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL ok: swapping [1] ptbase.t32 x [2] pteff05.t32 moves 764030 px (max Δ 67)
[default (what `screen render` draws)] [3] ptloop01.rat x [4] ptloop02.rat (key 32784): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [6] ptframe1.t32 x [7] ptframe2.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 4783 / 5297 px, shared 0 px
[everything on (focus+animated+primitives)] CONTROL ok: swapping [1] ptbase.t32 x [2] pteff05.t32 moves 725164 px (max Δ 50)
[everything on (focus+animated+primitives)] [3] ptloop01.rat x [4] ptloop02.rat (key 32784): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
[everything on (focus+animated+primitives)] [6] ptframe1.t32 x [7] ptframe2.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 4781 / 5305 px, shared 0 px
entry 6 18 elements 2 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL ok: swapping [11] ptbase.t32 x [12] pteff05.t32 moves 761600 px (max Δ 67)
[default (what `screen render` draws)] [0] ptframe3.t32 x [1] ptframe4.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 3646 / 3584 px, shared 0 px
[default (what `screen render` draws)] [14] ptloop01.rat x [15] ptloop02.rat (key 32784): NOT BOTH DRAWN — unreachable here
[everything on (focus+animated+primitives)] CONTROL ok: swapping [11] ptbase.t32 x [12] pteff05.t32 moves 721144 px (max Δ 50)
[everything on (focus+animated+primitives)] [0] ptframe3.t32 x [1] ptframe4.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 3646 / 3584 px, shared 0 px
[everything on (focus+animated+primitives)] [14] ptloop01.rat x [15] ptloop02.rat (key 32784): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
entry 7 30 elements 16 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL ok: swapping [8] ptlogo_eff3.t32 x [14] pteff04.t32 moves 240308 px (max Δ 225)
[default (what `screen render` draws)] [1] ptlogo2.t32 x [11] ptlogo_tm.t32 (key 32928): 1 px differ (0.0001% of frame), max Δ 1 | ink 58790 / 1062 px, shared 5 px
[default (what `screen render` draws)] [2] ptlogo1.t32 x [4] ptlogo1.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [3] ptlogo2.t32 x [5] ptlogo2.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [7] ptlogo_eff2.rat x [23] ptlogo_back2.t32 (key 32898): 67 px differ (0.0073% of frame), max Δ 1 | ink 74167 / 723 px, shared 8 px
[default (what `screen render` draws)] [8] ptlogo_eff3.t32 x [24] ptlogo_back2eff.t32 (key 32897): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 14507 px, shared 0 px
[default (what `screen render` draws)] [15] ptloop01.rat x [16] ptloop02.rat (key 32784): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [18] ptlogo_back2eff1.t32 x [19] ptlogo_back2eff2.t32 (key 32899): 211 px differ (0.0229% of frame), max Δ 1 | ink 2124 / 4909 px, shared 2124 px
[default (what `screen render` draws)] [18] ptlogo_back2eff1.t32 x [20] ptlogo_back2eff3.t32 (key 32899): 538 px differ (0.0584% of frame), max Δ 2 | ink 2124 / 7538 px, shared 2124 px
[default (what `screen render` draws)] [18] ptlogo_back2eff1.t32 x [21] ptlogo_back2eff4.t32 (key 32899): 941 px differ (0.1021% of frame), max Δ 2 | ink 2124 / 9413 px, shared 2124 px
[default (what `screen render` draws)] [18] ptlogo_back2eff1.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 1061 px differ (0.1151% of frame), max Δ 2 | ink 2124 / 16198 px, shared 2124 px
[default (what `screen render` draws)] [19] ptlogo_back2eff2.t32 x [20] ptlogo_back2eff3.t32 (key 32899): 216 px differ (0.0234% of frame), max Δ 1 | ink 4909 / 7538 px, shared 4909 px
[default (what `screen render` draws)] [19] ptlogo_back2eff2.t32 x [21] ptlogo_back2eff4.t32 (key 32899): 663 px differ (0.0719% of frame), max Δ 2 | ink 4909 / 9413 px, shared 4909 px
[default (what `screen render` draws)] [19] ptlogo_back2eff2.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 847 px differ (0.0919% of frame), max Δ 2 | ink 4909 / 16198 px, shared 4909 px
[default (what `screen render` draws)] [20] ptlogo_back2eff3.t32 x [21] ptlogo_back2eff4.t32 (key 32899): 330 px differ (0.0358% of frame), max Δ 1 | ink 7538 / 9413 px, shared 7538 px
[default (what `screen render` draws)] [20] ptlogo_back2eff3.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 526 px differ (0.0571% of frame), max Δ 2 | ink 7538 / 16198 px, shared 7538 px
[default (what `screen render` draws)] [21] ptlogo_back2eff4.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 9 px differ (0.0010% of frame), max Δ 1 | ink 9413 / 16198 px, shared 9413 px
[everything on (focus+animated+primitives)] CONTROL ok: swapping [8] ptlogo_eff3.t32 x [14] pteff04.t32 moves 825048 px (max Δ 225)
[everything on (focus+animated+primitives)] [1] ptlogo2.t32 x [11] ptlogo_tm.t32 (key 32928): 3 px differ (0.0003% of frame), max Δ 1 | ink 58742 / 1062 px, shared 5 px
[everything on (focus+animated+primitives)] [2] ptlogo1.t32 x [4] ptlogo1.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[everything on (focus+animated+primitives)] [3] ptlogo2.t32 x [5] ptlogo2.t32 (key 32928): NOT BOTH DRAWN — unreachable here
[everything on (focus+animated+primitives)] [7] ptlogo_eff2.rat x [23] ptlogo_back2.t32 (key 32898): 67 px differ (0.0073% of frame), max Δ 1 | ink 73690 / 729 px, shared 7 px
[everything on (focus+animated+primitives)] [8] ptlogo_eff3.t32 x [24] ptlogo_back2eff.t32 (key 32897): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 14531 px, shared 0 px
[everything on (focus+animated+primitives)] [15] ptloop01.rat x [16] ptloop02.rat (key 32784): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
[everything on (focus+animated+primitives)] [18] ptlogo_back2eff1.t32 x [19] ptlogo_back2eff2.t32 (key 32899): 193 px differ (0.0209% of frame), max Δ 1 | ink 2137 / 4917 px, shared 2137 px
[everything on (focus+animated+primitives)] [18] ptlogo_back2eff1.t32 x [20] ptlogo_back2eff3.t32 (key 32899): 511 px differ (0.0554% of frame), max Δ 2 | ink 2137 / 7552 px, shared 2137 px
[everything on (focus+animated+primitives)] [18] ptlogo_back2eff1.t32 x [21] ptlogo_back2eff4.t32 (key 32899): 931 px differ (0.1010% of frame), max Δ 2 | ink 2137 / 9422 px, shared 2137 px
[everything on (focus+animated+primitives)] [18] ptlogo_back2eff1.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 1034 px differ (0.1122% of frame), max Δ 3 | ink 2137 / 16223 px, shared 2137 px
[everything on (focus+animated+primitives)] [19] ptlogo_back2eff2.t32 x [20] ptlogo_back2eff3.t32 (key 32899): 233 px differ (0.0253% of frame), max Δ 1 | ink 4917 / 7552 px, shared 4917 px
[everything on (focus+animated+primitives)] [19] ptlogo_back2eff2.t32 x [21] ptlogo_back2eff4.t32 (key 32899): 668 px differ (0.0725% of frame), max Δ 2 | ink 4917 / 9422 px, shared 4917 px
[everything on (focus+animated+primitives)] [19] ptlogo_back2eff2.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 841 px differ (0.0913% of frame), max Δ 2 | ink 4917 / 16223 px, shared 4917 px
[everything on (focus+animated+primitives)] [20] ptlogo_back2eff3.t32 x [21] ptlogo_back2eff4.t32 (key 32899): 319 px differ (0.0346% of frame), max Δ 1 | ink 7552 / 9422 px, shared 7552 px
[everything on (focus+animated+primitives)] [20] ptlogo_back2eff3.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 539 px differ (0.0585% of frame), max Δ 2 | ink 7552 / 16223 px, shared 7552 px
[everything on (focus+animated+primitives)] [21] ptlogo_back2eff4.t32 x [22] ptlogo_back2eff5.t32 (key 32899): 6 px differ (0.0007% of frame), max Δ 1 | ink 9422 / 16223 px, shared 9422 px
entry 8 16 elements 2 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL ok: swapping [1] ptbase.t32 x [2] pteff05.t32 moves 771479 px (max Δ 66)
[default (what `screen render` draws)] [3] ptloop01.rat x [4] ptloop02.rat (key 32784): NOT BOTH DRAWN — unreachable here
[default (what `screen render` draws)] [6] ptframe1.t32 x [7] ptframe2.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 4778 / 5302 px, shared 0 px
[everything on (focus+animated+primitives)] CONTROL ok: swapping [1] ptbase.t32 x [2] pteff05.t32 moves 733320 px (max Δ 50)
[everything on (focus+animated+primitives)] [3] ptloop01.rat x [4] ptloop02.rat (key 32784): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
[everything on (focus+animated+primitives)] [6] ptframe1.t32 x [7] ptframe2.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 4782 / 5309 px, shared 0 px
entry 9 18 elements 2 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL ok: swapping [11] ptbase.t32 x [12] pteff05.t32 moves 768159 px (max Δ 66)
[default (what `screen render` draws)] [0] ptframe3.t32 x [1] ptframe4.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 3646 / 3584 px, shared 0 px
[default (what `screen render` draws)] [14] ptloop01.rat x [15] ptloop02.rat (key 32784): NOT BOTH DRAWN — unreachable here
[everything on (focus+animated+primitives)] CONTROL ok: swapping [11] ptbase.t32 x [12] pteff05.t32 moves 729480 px (max Δ 50)
[everything on (focus+animated+primitives)] [0] ptframe3.t32 x [1] ptframe4.t32 (key 32848): 0 px differ (0.0000% of frame), max Δ 0 | ink 3646 / 3584 px, shared 0 px
[everything on (focus+animated+primitives)] [14] ptloop01.rat x [15] ptloop02.rat (key 32784): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
entry 12 10 elements 1 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL UNAVAILABLE: no overlapping different-key pair is drawn
[default (what `screen render` draws)] [8] pgloading_eff01.t32 x [9] pgloading_eff02.t32 (key 49408): 1761 px differ (0.1911% of frame), max Δ 1 | ink 30864 / 21163 px, shared 3298 px
[everything on (focus+animated+primitives)] CONTROL DEAD: swapping [6] pgloading_loop5.rat x [7] pgloading_baseeff.t32 changes NOTHING — zeros below are uninterpretable
[everything on (focus+animated+primitives)] [8] pgloading_eff01.t32 x [9] pgloading_eff02.t32 (key 49408): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
entry 15 10 elements 1 overlapping tied pair(s)
[default (what `screen render` draws)] CONTROL UNAVAILABLE: no overlapping different-key pair is drawn
[default (what `screen render` draws)] [8] pgloading_eff01.t32 x [9] pgloading_eff02.t32 (key 49408): 1761 px differ (0.1911% of frame), max Δ 1 | ink 30864 / 21163 px, shared 3298 px
[everything on (focus+animated+primitives)] CONTROL DEAD: swapping [6] pgloading_loop5.rat x [7] pgloading_baseeff.t32 changes NOTHING — zeros below are uninterpretable
[everything on (focus+animated+primitives)] [8] pgloading_eff01.t32 x [9] pgloading_eff02.t32 (key 49408): 0 px differ (0.0000% of frame), max Δ 0 | ink 0 / 0 px, shared 0 px
default-options summary: 26 of 31 overlapping tied pairs change at least one pixel; 6 dead/unavailable controls