OK, this is the big one. We still keep using `#include` guards only
where we absolutely need to, but with each header now being valid in
isolation, this can now actually help *minimize* the length of each
translation unit's `#include` list. Turns out that after removing all
the duplicates, we only *actually* need to guard 29 headers across all
5 games.
Part of P0285, funded by [Anonymous] and iruleatgames.
Much more than usual, now that we've got a snappy build system! This
commit covers
• All .PI functions across all games
• TH02's High Score entry functions
• TH03's shots_update() and shots_render()
• All functions declared in `th04/op/op.hpp`
• TH04/TH05's bb_txt_put_8_raw(), bullet_template_clip(),
player_pos_update_and_clamp(), score_update_and_render(), and
slowdown_frame_delay()
• TH05's reimu_stars_update_and_render(), score_delta_commit(),
stage2_invalidate(), stage2_update(), and space_window_set()
Part of P0284, funded by [Anonymous] and Blue Bolt.
All but one of the writes to these globals follow the consistent scheme
of assigning hardcoded literals to first `w` and then `h`, so it makes
sense to encapsulate the conversion from display-space pixels to VRAM
words and heights in a method.
(On that note, we also need a new type to encode the notion of
VRAM-space heights as opposed to the display-space heights of
`pixel_t`.)
Part of P0280, funded by [Anonymous], Blue Bolt, and JonathKane.
Makes sense for this game as well, even if it can only serve
documentary purpose due to it not knowing which playfield it's on.
Part of P0182, funded by Lmocinemod and [Anonymous].
nmlgc