Commit Graph

11 Commits

Author SHA1 Message Date
nmlgc 5bffab4f43 [Position independence] [th04/th05] Remaining references to PI slots
Part of P0060, funded by Touhou Patch Center.
2019-11-28 23:23:30 +01:00
nmlgc 3b7561a711 [Maintenance] Export all pascal functions with their proper uppercase names
Yup, that was one massive screw-up.

Part of P0030, funded by zorg.
2019-09-15 20:29:47 +02:00
nmlgc 062e775f41 [Reverse-engineering] [th04/th05] .BB file loading boilerplate
Yup, nothing interesting in here.
Except for maybe the confirmation that LS00.BB is used for the curved
bullets used by Shinki and EX-Alice?

Funded by -Tom-.
2019-03-01 16:17:52 +01:00
nmlgc 612beb815b [Maintenance] Clean up the confusion between "tiles" and .STD tile sections
Funded by -Tom-.
2018-12-30 02:30:16 +01:00
nmlgc 4fe4c8eed1 [Reverse-engineering] [th04/th05] Scrolling-related variables
Funded by -Tom-.
2018-12-29 18:34:51 +01:00
nmlgc 261d5037ed [Reverse-engineering] [th04/th05] .STD file loading
… because TH04's version of this takes the ASCII stage ID directly from
the resident structure.

So boss battles are simply triggered by setting the background tile
scroll speed to 0? That means…

Funded by zorg.
2018-12-26 17:59:03 +01:00
nmlgc 6d8ff6b72e Make previously reduced ZUN functions available to C 2015-02-21 14:12:22 +01:00
nmlgc a07e5fad42 [Reverse-engineering] Slot-based PI display
Also covering the two variations for blitting only every second row or
blitting only a 320x200 quarter, as seen in the endings.

So yeah, there's indeed nothing wrong with piread.cpp. TH03 just uses that
separate function that only blits every second row of an image, and indeed
always loads the entire image as it would appear in a PNG conversion. Here's
what happens if you display these images using the non-interlacing function:
https://www.dropbox.com/s/885krj09d9l0890/th03%20PI%20no%20interlace.png
2014-12-18 14:36:43 +01:00
nmlgc bead27b781 Use TASM calling convention syntax for previously identified ZUN functions
With TH03 changing the calling convention for most of the code from __cdecl to
__pascal, I've been getting more and more confused about this myself. So,
let's settle on the following consistent syntax for function calls:

* C where the calling convention is actually __cdecl and where TASM's emitted
  __cdecl code matches the original binary
* PASCAL where the calling convention is actually __pascal
* STDCALL where the calling convention is actually __cdecl, but where
  the caller either defers stack cleanup (summing up the stack size of
  multiple functions, then cleaning it all in a single "add sp" instruction)
  or where the stack is cleared in a different way (e.g. "pop cx").

Unfortunately though, when using the ARG directive to automatically generate
an appropriate RET instruction for the given calling convention, TASM always
emits ENTER and LEAVE instructions even when no local variables are declared,
which greatly limits the number of functions where we can use that syntax. -.-
2014-12-16 05:53:56 +01:00
nmlgc 510a3a5070 [Reverse-engineering] pi_slot_palette_apply 2014-11-22 09:29:09 +01:00
nmlgc f54b85577d [Reverse-engineering] Slot-based PI file loading and freeing 2014-11-18 17:56:13 +01:00