Commit Graph

356 Commits

Author SHA1 Message Date
nmlgc 6d977a9df7 [Decompilation] [th03/th04/th05] Cutscenes: Main script parsing loop
Part of P0225, funded by Enderwolf, Blue Bolt, 32th System, and Yanga.
2022-11-30 22:46:22 +01:00
nmlgc 8118e61c77 [Decompilation] [th03/th04/th05] Cutscenes: Script opcode interpreter
Even that part's the same in these three games… except for the 27 small
places where it isn't, 7 of which are purely coding style cosmetics.

Completes P0224, funded by Splashman and -Tom-.
2022-11-30 22:46:22 +01:00
nmlgc f01e46700d [Maintenance] [th04/th05] Cutscenes: Move box code to the main translation unit
With the script parsing and picture/box rendering functions being as
interleaved as they are, it makes little sense to keep the cutscene
code in more than one translation unit. How would those translation
units even be called? This time, having everything in one file should
beat the few hundred preprocessor-removed lines of code that we end up
adding to each one of the three affected games – and ultimately, you'd
want to merge those systems into one translation unit anyway.

Part of P0224, funded by Splashman and -Tom-.
2022-11-30 19:31:14 +01:00
nmlgc ac3fba3dce [Decompilation] [th03/th04/th05] Cutscenes: Line and box feeds
Part of P0224, funded by Splashman and -Tom-.
2022-11-30 19:26:55 +01:00
nmlgc 0d85265931 [Decompilation] [th03/th04/th05] Cutscenes: 3-digit number parsing
Used for all ASCII number parameters to script functions, as well as
for TH04's dialog script.

Part of P0224, funded by Splashman and -Tom-.
2022-11-30 19:22:48 +01:00
nmlgc 371292dab2 [Decompilation] [th03/th04] Cutscenes: Box background blitting and unblitting
Completes P0223, funded by Blue Bolt and rosenrose.
2022-11-30 19:16:47 +01:00
nmlgc 6f8b32ca4a [Decompilation] [th03/th04/th05] Cutscenes: Masked blitting of new pictures
Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 19:16:35 +01:00
nmlgc 684c149bef [Decompilation] [th03/th04] Cutscenes: Copying pictures from VRAM page 0→1
And another variation of an EGC-accelerated inter-page copy. At least
it's slightly more optimized compared to TH01's horribly slow one.
But wait, page *0* to page *1*? That seems kind of backwards…

Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 19:11:06 +01:00
nmlgc fb9f18e967 [Decompilation] [th03/th04/th05] Cutscenes: EGC initialization
That only leaves the TH02 versions of this function that really should
have been defined at one central location.

Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 19:08:52 +01:00
nmlgc 023cdacc36 [Decompilation] [th03/th04/th05] Cutscenes: Script loading and freeing
Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 19:08:28 +01:00
nmlgc 7cda9e28b2 [Decompilation] [th04/th05] Cutscenes: Text blending animation
Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 17:11:00 +01:00
nmlgc ee717c1d19 [Reverse-engineering] [th03/th04/th05] Cutscenes: State variables
You can fast-forward through cutscenes by holding Escape in these
games?! And the script interpreter adds automatic line breaks?!

Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 17:10:19 +01:00
nmlgc ccd5b70b9f [Maintenance] [th03/th04/th05] Cutscenes: Move into a separate subdirectory
Thanks to TH03 having text-below-picture cutscenes before stages 8 and
9, the `/end/` directory is the wrong place to keep this code. And as
we're soon going to see, this feature did evolve during these three
games.

Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 17:02:34 +01:00
nmlgc 2458172c98 [Maintenance] [th02/th03/th04/th05] Define a constant for a white VRAM color
Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 17:00:42 +01:00
nmlgc d3abb3b3ec [Maintenance] Correctly declare egc_start_copy_*()
Part of P0223, funded by Blue Bolt and rosenrose.
2022-11-30 16:40:12 +01:00
nmlgc a2358bef47 [Maintenance] Remove `extern "C"` from `x86real.h` and `decomp.hpp`
One of those per delivery now, eh?

Part of P0189, funded by Arandui and Lmocinemod.
2022-04-16 23:53:46 +02:00
nmlgc b95450b026 [Maintenance] Remove the .ALPHA segment ordering workaround
We could have just abused the _TEXT segment all this time?!

Part of P0172, funded by [Anonymous] and Blue Bolt.
2021-12-27 01:06:26 +01:00
nmlgc 5fac2006ff [Maintenance] Consistently use "score" instead of "points"
Or at least in addition.

Part of P0172, funded by [Anonymous] and Blue Bolt.
2021-12-27 00:50:39 +01:00
nmlgc f005eb023b [Maintenance] Remove all unused externs in ASM land
Part of P0158, funded by Yanga.
2021-09-28 18:05:24 +02:00
nmlgc 6333643222 [Decompilation] [th03/th04/th05] cfg_load_resident_ptr()
Including the pointless DOS I/O variation in TH05's MAIN.EXE.
I'm slowly running out of characters to remove from the first segment
name in that file, though…

Part of P0148, funded by [Anonymous].
2021-07-21 00:34:59 +02:00
nmlgc 06dbb6335c [Naming] [th03/th04/th05] Clarify that cfg_load_resident() only loads a pointer
It shouldn't need a comment to communicate that this function does in
fact not load all values from the .CFG file that are part of the
resident structure, but only loads and sets the global pointer to that
structure.

Part of P0148, funded by [Anonymous].
2021-07-20 23:35:50 +02:00
nmlgc 241b61e808 [Maintenance] Distinguish between Shift-JIS and gaiji strings
The main point of the previous strings/ subdirectory was to bundle all
hardcoded strings for translators. And sure, *technically*, gaiji
strings are *both* strings *and* something you might want to translate.
But mainly, they're sprites with an attached enum, and their own
directory. Changes to the enum quickly tend to involve changes to the
strings that use these values, so it makes sense to keep both in the
same directory.

Especially since 82% of the previous strings/ directories consisted of
such gaiji strings.

That leaves the strings/ directory rather empty and nondescript though.
Recently though, I've been wanting to generally move all Shift-JIS text
to this directory. While that wouldn't *solve* the typical "text editor
accidentally a file upon save, due to wrongly detected encoding" issue,
it's at least a mitigation: If all Shift-JIS strings are in files that
contain nothing *but* Shift-JIS strings, a wrongly detected encoding
becomes immediately noticeable.

For that job, strings/ can have a more descriptive name though. Hence,
shiftjis/.

Part of P0141, funded by [Anonymous] and rosenrose.
2021-05-27 19:10:26 +02:00
nmlgc d9858113d8 [Decompilation] [th04] snd_load()
Last one! Done with the SHARED segment for the forseeable future! 🎉

Sure, not the best C++ code either, but still by far the sanest
implementation of this function in any of the 4 games.

Completes P0139, funded by [Anonymous].
2021-05-12 14:31:03 +02:00
nmlgc ca4bf5002a [Separate translation units] [th04] cdg_put_plane() (undecompilable)
Reason: Self-modifying. -.-

Part of P0139, funded by [Anonymous].
2021-05-11 18:48:00 +02:00
nmlgc 62e0167e20 [Translation unit catch-up] [th03/th04/th05] snd_delay_until_measure(), game_exit_to_dos()
Segment alignment issues once again… but that completes the SHARED
segments of all TH03 and TH05 binaries, for now!

Part of P0139, funded by [Anonymous].
2021-05-11 18:48:00 +02:00
nmlgc 78df46af1f [Decompilation] [th04/th05] snd_determine_modes()
ZUN apparently had no trust in the sanity of Turbo C++'s code
generation?

Part of P0139, funded by [Anonymous].
2021-05-11 18:47:59 +02:00
nmlgc 7761f4e804 [Decompilation] [th04] snd_kaja_interrupt()
4 games, 4 different versions of this function. Interestingly,
moving the game-specific differences to inline functions makes it
obvious that this function was only intended for BGM, not sound
effects.

Part of P0139, funded by [Anonymous].
2021-05-11 18:47:57 +02:00
nmlgc 4c0e76ab89 [Decompilation] [th04/th05] snd_mmd_resident()
Part of P0139, funded by [Anonymous].
2021-05-11 18:47:57 +02:00
nmlgc 4c8a3cb353 [Decompilation] [th04/th05] snd_pmd_resident()
Part of P0139, funded by [Anonymous].
2021-05-11 18:47:56 +02:00
nmlgc 8e16481e27 [Translation unit catch-up] [th04] vector1_at(), vector2_at()
Part of P0139, funded by [Anonymous].
2021-05-11 18:47:54 +02:00
nmlgc aaa37c7081 [Decompilation] [th04] input_wait_for_change(), .MPN: Freeing / palette setting
Another three functions in one commit, forced by segment alignment…

Part of P0138, funded by [Anonymous] and Blue Bolt.
2021-04-22 19:27:08 +02:00
nmlgc 04038449c1 [Translation unit catch-up] [th04] frame_delay() / .PI display and loading
Segment alignment forces us to do all of those at once… but now, we've
not only caught up with the segment split point in TH04's OP.EXE and
MAINE.EXE, but also decompiled all instances of DEFCONV functions!

Part of P0138, funded by [Anonymous] and Blue Bolt.
2021-04-21 17:44:15 +02:00
nmlgc c2f6abd091 [Translation unit catch-up] [th04] cdg_put_8()
Part of P0138, funded by [Anonymous] and Blue Bolt.
2021-04-21 16:24:18 +02:00
nmlgc 6264ca743c [Translation unit catch-up] [th03/th04] game_exit()
Part of P0137, funded by [Anonymous].
2021-04-03 22:29:12 +02:00
nmlgc 8bcf5d7b84 [Regression] Explicitly request 16-bit default segments when using .MODEL
Whoops, turns out that the build has been broken on TASM32 version 5.3
(the one in the DevKit) ever since 7897bf1. In contrast to version 5.0
(which I use for my development), 5.3 actually defines 32-bit segments
if you specify a .386 CPU before using .MODEL.

That might have been the reason for the .286 workaround all along?
Turns out there's the USE16 modifier, which makes this much more
explicit than switching CPUs.
2021-03-29 22:39:11 +02:00
nmlgc 0d82f113e9 [Translation unit catch-up] [th04] game_init_op(), game_init_main()
Padding byte-induced undecompilability of cdg_put_noalpha_8() avoided 👌

Part of P0136, funded by [Anonymous].
2021-03-20 02:36:41 +01:00
nmlgc a2e515534c [Translation unit catch-up] [th04] Low-level input
Part of P0136, funded by [Anonymous].
2021-03-20 02:36:38 +01:00
nmlgc 16899204df [Decompilation] [th04/th05] Sound effect playback
At least it's decompilable in these games, and quite nicely so!

Part of P0136, funded by [Anonymous].
2021-03-20 02:36:38 +01:00
nmlgc 8164c71d22 [Decompilation] [th04/th05] bgimage_snap(), bgimage_put(), bgimage_free()
Eh, REP MOVSD is used too inconsistently across the games to justify
replacing these macros with an `inline` function. Still can use a
custom one here to make the register usage a bit more explicit, though.

Part of P0136, funded by [Anonymous].
2021-03-20 02:36:36 +01:00
nmlgc f35b051edd [Separate translation units] [th04/th05] bgimage_put_rect() (undecompilable)
Reason: Self-modifying. -.-

Part of P0135, funded by [Anonymous].
2021-03-19 23:19:48 +01:00
nmlgc 88c019eb91 [Maintenance] Move the bgimage_*() functions to the hardware/ directory
Not that it really fits there either, but I've been trying to keep the
th0?/ directories free from any actual code. They should only contain
the distinct translation units within the original three .EXE binaries,
`#include`ing files from subdirectories, along with maybe game-specific
`#pragma`s, but contain no code on their own. Port authors would simply
ignore those, and link everything from the subdirectories into one
binary. That approach has seemed to make the most sense for all of this
so far.

Part of P0135, funded by [Anonymous].
2021-03-19 20:06:54 +01:00
nmlgc e4eed85c44 [Separate translation units] [th04/th05] Low-level input (undecompilable)
Reason: Manual "tail call optimization" of input_reset_sense(), with
execution falling through to input_sense() immediately below.

Part of P0133, funded by [Anonymous].
2021-01-30 19:11:01 +01:00
nmlgc 3bf078b68c [Separate translation units] [th02/th03/th04] pi_load()
Part of P0132, funded by [Anonymous].
2021-01-05 20:01:44 +01:00
nmlgc 39aa257a5d [Decompilation] [th03/th04] pi_put_quarter_8()
Part of P0132, funded by [Anonymous].
2021-01-05 19:47:12 +01:00
nmlgc 6d69ea8152 [Maintenance] Decide on `_masked` instead of `_mask` for blitting functions
Because there are only three functions that didn't already follow this
naming scheme.

(Maintenance mode commit)
2020-12-02 00:10:48 +01:00
nmlgc 7897bf166f [Separate translation units] [th04/th05] .CDG: Loading and freeing
Undecompilable again. The loading functions have these *_noalpha()
variants that simply set a global variable and fall through to the
regular functions, while cdg_free() has its first `PUSH DI` instruction
after the first expression we'd be decompiling. cdg_free_all() *could*
be decompiled… but would also require _FLAGS trickery, and it's simply
not worth starting a translation unit for one such small function.

Part of P0127, funded by [Anonymous].
2020-11-16 20:01:35 +01:00
nmlgc 4850d6d457 [Maintenance] Rename "seg2" to "SHARED"
There's the better name, in ALLCAPS for improved grepping. TH01 is also
going to need a pseudo-binary to bundle translation units that appear
in more than one .EXE, and since "segment 2" would be wrong for that
game, it makes more sense to have one consistent name for these
pseudo-binaries in all games.

(Maintenance mode commit)
2020-11-03 17:01:26 +01:00
nmlgc f1c63ab3a1 [Reverse-engineering] Assign names to all graph_putsa_fx() effects
And get rid of the constraining FX() macro, with its spacing parameter
that we haven't even seen used so far.

Part of P0124, funded by [Anonymous] and Blue Bolt.
2020-11-02 22:33:50 +01:00
nmlgc 30462cc64f [Maintenance] Indicate byte alignment for all .PI blitting functions
Part of P0124, funded by [Anonymous] and Blue Bolt.
2020-11-02 22:19:12 +01:00
nmlgc 8c1d4bf41b [Maintenance] Locate the BSS segment of master.lib's `clip.asm`
By now, it's become obvious where it has to be. Apparently, the order
of translation units inside ZUN's modified master.lib did somehow
change with TH02?

(Maintenance mode commit)
2020-09-29 07:03:06 +02:00