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Implement numeric HUD rendering

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gamer147
2026-07-21 15:54:13 -04:00
parent e2973f66b1
commit 89cc099ba3
6 changed files with 273 additions and 12 deletions
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docs/engine-re.md
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@@ -2488,16 +2488,20 @@ the port:
them for the field HUD's turn/control/mana/level/HP/SP/FS values.
This path creates ordinary retained graphics objects, so the existing atlas decode and compositor are
already the correct backend. The missing engine model is the 11 style records plus the two VM dispatches;
it is not an immediate `GodotAdvHost.DrawTexture` raster operation.
the correct backend; it is not an immediate `GodotAdvHost.DrawTexture` raster operation. The port now
models all 11 EngineCtx style records in `GfxState` and implements both dispatches. Each `0x23b` call erases
its full destination-handle capacity and then uses the ordinary
`BindDraw` path for every displayed digit, preserving surface replacement, z-order, and compositor effects.
The absent unit and weapon names are a separate layout-compute gap. `DRAWCHP.BIN` does populate both
strings and calls `draw-string` at `0x9c6`/`0x9f5`, but first centers each one with opcode `0x1a6`.
`op_0x1a6_half_byte_strlen@0x427020` resolves the NUL-terminated engine byte string and writes
`strlen(bytes) >> 1`. The script multiplies that result by 21 and subtracts it from x=257 on a 263-pixel
scratch surface. With the opcode skipped, x remains 257 and Godot correctly clips nearly all of the text.
An implementation must preserve the original encoded byte count (or reproduce it with CP932 encoding),
not use the .NET UTF-16 character count.
The port reproduces the encoded byte count rather than using the .NET UTF-16 character count. The VM's
native-string code page is configurable for other container frontends and defaults to SYS4's CP932; the
calculation also stops at an embedded NUL before shifting. Focused tests cover CP932 mixed-width strings,
all three numeric layout flags, zero padding, retained-object replacement, and invalid/unregistered styles.
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