Previously, before the game loop order got fixed, going to the in-game
settings would switch over to the new render function too early, causing
a deltaframe glitch that had to be fixed. But now, the render function
only gets switched when the current gamestate's function list gets
finished executing, so the game won't suddenly switch to titlerender()
in the middle of the ACTION press to the in-game settings screen.
As a consequence, titleupdatetextcol() no longer needs to be exported to
Input.cpp.
The previous location of this loop was placed there because it happened
just after the end of the render function. Now that the loop order is
fixed, the first thing that happens after the render function is the
start of gamelogic(), so this loop should go there now, else entity
positions won't be interpolated.
Also it now preincrements instead of postincrements because I like
preincrements.
Okay, so the reason why all render functions were moved to the end of
the frame in #220 is because it's simpler to call two fixed functions
and then a delta function instead of one fixed function, then a delta
function, and then another fixed function.
This is because fixed functions need special handling inside
deltaloop(), and you can't simply duplicate this handling after calling
a delta function. Oh, and to make matters worse, it's not always
fixed-delta-fixed, sometimes (like in MAPMODE and TELEPORTERMODE) it's
delta-fixed-fixed, so we'd need to handle that somehow too.
The solution here is to generalize the game loop and factor out each
function, instead of hardcoding it. Instead of having hardcoded
case-switches directly in the loop, I made a function that returns an
array of functions for a given gamestate, along with the number of
functions, then the game loop processes it accordingly. In fixedloop(),
it iterates over the array and executes each function until it reaches a
delta function, at which point it stops. And when it reaches the end of
the array, it goes back to the start of the array.
But anyway, if it gets to a delta function, it'll stop the loop and
finish fixedloop(). Then deltaloop() will call the delta function. And
then on the next frame, the function index will be incremented again, so
fixedloop() will call the fixed functions again.
Actually, the previous game loop was actually made up of one big loop,
with a gamestate function loop nested inside it, flanked with code that
ran at the start and end of the "big loop". This would be easy to handle
with one loop (just include the beginning and end functions with the
gamestate functions in the array), except that the gamestate functions
could suddenly be swapped out with unfocused functions (the ones that
run when you unfocus the window) at any time (well, on frame boundaries,
since key.isActive only got checked once, guarding the entire "inner
loop" - and I made sure that changing key.isActive wouldn't immediately
apply, just like the previous game loop order) - so I had to add yet
another layer of indirection, where the gamestate functions could
immediately be swapped out with the unfocused functions (while still
running the beginning and end code, because that was how the previous
loop order worked, after all).
This also fixes a regression that the game loop that #220 introduced
had, where if the fixed functions switched the gamestate, the game would
prematurely start rendering the gamestate function of the new gamestate
in the deltaframes, which was a source of some deltaframe glitches. But
fixing this is likely to just as well cause deltaframe glitches, so it'd
be better to fix this along with fixing the loop order, and only have
one round of QA to do in the end, instead of doing one round after each
change separately.
Fixes #464... but this isn't the end of the patchset. There are bugs
that need to be fixed, and kludges that need to be reverted.
Y-position 180 would be the position of the Level Complete and Game
Complete special text boxes in Flip Mode. However, since the y-position
of flipme text boxes actually no longer change (because we have to
accomodate changing Flip Mode on-the-fly), these text boxes will never
actually be y-position 180 - so we should remove these checks for
clarity.
A-ha! I've spotted an inconsistency! The normal trinket collection text
boxes (gamestate 1000-1003) is aware of Flip Mode, and will position
themselves accordingly to read the correct way in Flip Mode. However,
foundtrinket() doesn't do this.
Well, now it does.
This is why the text box attribute was named flipme, after all.
You may have noticed that the flipme command inverts textflipme instead
of simply setting it to true. Well, that's because it should be the same
as the previous behavior, which was essentially to invert it instead of
setting it to true - i.e. calling flipme twice would keep the original
text box position in Flip Mode, which means it would be upside-down
(this is a lot of flipping to keep track of...) - because flipme added
to texty in-place instead of simply assigning to it. (It did the
calculation incorrectly in 2.2 and previous, but I digress.)
Similarly, textflipme is not reset in hardreset(), because none of the
other script text box variables are reset either.
This ensures that if the player decides to toggle Flip Mode while one of
these text boxes is up, they won't be oriented improperly. Additionally,
it also de-duplicates a bunch of Flip Mode check code, which is also a
win.
createtextboxreal() is the same as createtextbox(), but with a flipme
parameter added to create text boxes that have their flipme attribute
set to true. createtextbox() just calls createtextboxreal() with flipme
set to false, and createtextboxflipme() just calls createtextboxreal()
with flipme set to true; this is because I do not want to use C++
function overloading.
Instead of calculating the y-position of the text box when it's created,
we will store a flag that says whether or not the text box should be
flipped in Flip Mode (and thus stay right-side-up), and when it comes
time to draw the text box, we will check Flip Mode and calculate the
position then.
Instead of duplicating the same variables over and over again,
Graphics::drawgui() can just make its own SDL_Rect. It's not that hard.
As far as I can tell, textrect was always being properly kept up to date
by the time Graphics::drawgui() got around to rendering
(textboxclass::resize() keeps being called a LOT), so this shouldn't be
a noticeable change from the user perspective.
The "Game Saved" text box, along with its associated telesave() call,
exists in both Game.cpp and Script.cpp, so one of them is the copy-paste
of the other. Unfortunately this copy-paste resulted in an inconsistency
where both of them don't check for the same things when deciding whether
or not the telesave should actually happen (this is why you don't
copy-paste, kids... it's scary!).
Either way, de-duplicating this now is less work for me later.
Every Level Complete sequence is the same copy-pasted thing, but with
minor changes. To make my work easier, I'm de-duplicating them so I have
less text boxes to change later, and less grind to grind.
These default arguments are never used anywhere. And if they were used
anywhere, it'd be better to explicitly say 255,255,255 than make readers
have to look at the header file to see what these default to. Also, this
creates four different overloads of createtextbox(), instead of only
two - but we ought to not be using function overloading anyway.
These commented-out code blocks just get in the way of clarity when I'm
refactoring flipped textboxes created in the gamestate system. So I'm
getting rid of them. If we need them back, we always have Git history.
Since the only difference is the y-positions, I've decided to remove the
copy-pasted code. A better solution would be to have a function that
draws multiline text and handles it accordingly in Flip Mode, but that
could be done later.
The only difference between Flip Mode and normal mode is the y-position
and sprite used to draw the crewmates. Everything else is the same, so
I've removed the copy-pasted portion.
The diff might look a bit ugly due to the unindentation.
Since the only difference in Flip Mode is the positiveness/negativeness
of the iterator variable, plus the starting y-offset, I've removed the
copy-pasted code and did this instead.
The diff might look a bit ugly due to the unindentation.
Like cutscene bars, I've added Graphics::setfade(), to ensure that no
deltaframe rendering glitches happen due to oldfadeamount not being
updated properly.
And indeed, this fixes a deltaframe rendering glitch that happens if you
return to the editor from playtesting on a faded-out screen, then fade
out again (by either re-entering playtesting and then cause a fadeout to
happen again, or by quitting from the editor afterwards). The same
glitch also happens outside of in-editor playtesting if you exit to the
menu while the screen is faded out.
To do this, I've added Graphics::setbars(), to make sure
oldcutscenebarspos always gets assigned when cutscenebarspos is. This
fixes potential deltaframe rendering issues if these two mismatch.
While working on #535, I noticed that editormenuactionpress() still
didn't do the explicit void declaration. Then I ran `rg 'void.*\(\)'`
and found three other functions that I somehow missed in #628. Whoops.
Well, now they no longer are missed.
This is a small quality-of-life tweak that makes it so if you're in the
middle of editing a level, you don't have to save the level, exit to the
menu, change whatever setting you wanted, re-enter the editor, and type
in the level name, just to change one setting. This is the same as
adding Graphic Options and Game Options to the in-game pause menu,
except for the editor, too.
To do this, I'm reusing Game::returntopausemenu() (because all of its
callers are the same callers for returning to editor settings) and
renamed it to returntoingame(), then added a variable named
ingame_editormode to Game. When we're in the options menus but still in
the editor, BOTH ingame_titlemode and ingame_editormode will be true.
This is a small quality-of-life thing that makes it so you don't have to
move your menu selection all the way over to the "return" button in
order to return to the previous menu. You can just press Escape instead
to return to the previous menu. The previous behavior of pressing Escape
was to bring up the 'confirm quit' menu, or if you were in an options
menu in-game, return to the pause menu.
If you're on the main menu (and thus don't have any previous menu) and
press Escape, the game will instead bring up the 'confirm quit' menu.
For consistency, the "quit game" option on the main menu will also bring
up the 'confirm quit' menu as well, instead of immediately closing the
game.
Pressing the controller button mapped to Escape will also work as well.
The only menus that don't have return buttons are the 'countdown' menus
- so the game will not let you press Escape if there's a menu countdown
happening.
Now that pressing Escape in the 'continue' menu will just bring you back
to the 'play' menu, there's no need to specifically put
map.nexttowercolour() first when canceling the 'confirm quit' menu.
As part of my work in #535, I've noticed that 2.3 currently with 2.2
loop order doesn't have interpolated cutscene bars. This is because
cutscene bars in 2.3 get updated at the start of the frame, which
interpolates them correctly until the render functions are put in their
proper place.
There is, however, a somewhat bigger issue, outside the scope of #535,
where cutscene bars always get updated regardless of which gamemode you
are in. Previously in 2.2 and previous, cutscene bars only got updated
in GAMEMODE and TELEPORTERMODE; sometime during 2.3, the cutscene bars
timer got pulled out of all the individual game modes and moved to the
very start of the loop. (I was probably the one who did this change;
I've been caught in a trap of my own devising.)
Thus, going to MAPMODE during the cutscene bars animation doesn't keep
their position paused like it would in 2.2. This is also categorically a
more-than-visual change, since the untilbars() script command depends
on the cutscene bars timer. I see no reason for the cutscene bars to
behave differently in this way than 2.2; #535 would also end up doing
the same fix more-or-less anyway.
Since TELEPORTERMODE currently uses the same renderfixed function as
MAPMODE, I've had to add a teleporterrenderfixed() that just calls
maprenderfixed(), but also does the cutscene bars timer.
As a partial fix for #618, adding the SDL2 version number to the README
will clarify that you need a specific version of SDL2 in order to
compile (and run) the current version of the game (2.3 at the time of
writing); in the future, the SDL2 dependency will be upgraded with each
SDL release.
This is to avoid error messages that complain about missing symbols like
SDL_zeroa() (added in SDL 2.0.14) not being present at the time of
compilation.
Closes#626.
This moves the responsibility of toggling fullscreen when any of the
three toggle fullscreen keybinds are pressed (F11, Alt+Enter, Alt+F)
directly into key.Poll() itself, and not its caller (which is main() -
more specifically, fixedloop()). Furthermore, the fullscreen toggle
itself has been moved to a separate function that key.Poll() just calls,
to prevent cluttering key.Poll() with more business logic (the function
is already quite big enough as it is).
As part of my work in re-removing the 1-frame input delay in #535, I'm
moving the callsite of key.Poll() around, and I don't want to have to
lug this block of code around with it. I'd rather refactor it upfront
than touch any more lines than necessary in that PR.
This fixes a bug where the resumemusic() script command would always
play MMMMMM track 15 (or, if you're using PPPPPP, just not work). This
is because musicclass::haltdasmusik() assigns resumesong AFTER calling
Mix_HaltMusic(), but the songend() callback fires before the resumesong
assignment, meaning resumesong gets set to -1 instead of whatever
currentsong was previously.
To fix this, just move the assignment into the callback itself (I don't
know why this wasn't done before). I could have moved it to before the
Mix_HaltMusic() call, but moving it into the callback itself fixes it
for all cases of the music stopping (such as when the music fades out).
This avoids the room name awkwardly moving back up if the cursor is at
the bottom of the screen in a room with a room name, then the user
switches to a room without a room name, then moves the cursor away from
the bottom, then switches to a named room - even though the cursor was
already away from the bottom of the screen.
Conversely, if the user moves their cursor to the bottom of the screen
in an unnamed room, then switches into a named room, the room name will
already have been hidden and they won't need to wait for it to hide.
This fixes the drawer suddenly popping up only to disappear, if the user
leaves a Direct Mode room into a non-Direct Mode room when the drawer
hasn't closed all the way, and then re-enters a Direct Mode room.
Gravity line correction no longer happens on every deltaframe. This
means less CPU time is wasted. Although, there's probably no need to
correct gravity lines on every single frame... hm... well, that's an
optimization for later (there's plenty of other stuff to cache, like
minimap drawing or editor foreground drawing).
Since it only ever gets assigned from FILESYSTEM_getUserSaveDirectory(),
and that function returns a C string, and the variable is only ever read
from again, this doesn't need to be an std::string.
In #553, when Dav999 added error messages to settings menus if the game
was unable to successfully save the changed settings, he seemed to have
forgotten the PPPPPP/MMMMMM toggle option.
However, I can fully blame him for only that miss. The Flip Mode options
were using game.savemystats (which was removed in #591), so if he
searched for all instances of game.savestats()
(game.savestatsandsettings() was only added in #557), he would've missed
the game.savemystats.
Later, when I did #591, I didn't realize that I should've replaced the
ones in the Flip Mode options with game.savestatsandsettings_menu(), so
part of the blame does fall on me.
Anyways, this is fixed now.
If there was absolutely no music playing, and you went to the in-game
options to switch between MMMMMM and PPPPPP, the behavior would be a bit
glitchy.
If you started with PPPPPP, switching once to MMMMMM wouldn't play
anything, but then switching back to PPPPPP would play MMMMMM track 15.
Then switching back to MMMMMM wouldn't do anything, but then switching
back to PPPPPP again would play PPPPPP track 15 - and from there, the
behavior is stable.
If you started with MMMMMM, switching once to PPPPPP would play MMMMMM
track 15. Then switching back to MMMMMM wouldn't do anything, but then
switching back to PPPPPP would play PPPPPP track 15 - and as above, the
behavior is stable after that.
Anyways, the point is, -1 shouldn't be passed to musicclass::play()
unless you want glitchy things. And I'm not patching -1 out of
musicclass::play() itself, because passing negative numbers results in a
useful glitch (that's existed since 2.2) where you can play MMMMMM
tracks while having PPPPPP selected, effectively doubling the amount of
usable music tracks within a custom level; it also seems like the game
does -1 checks elsewhere, so I'm just being consistent with the rest of
the game (although, yes, I am technically single-case patching this).
I ran Include What You Use on the file, and a BUNCH of transitive
includes showed up.
colourTransform is used in the file, so GraphicsUtil.h needs to be
included. libc floor() is used in the file, so math.h needs to be
included (I'm removing this next...). NULL is used, so stddef.h. And
stdlib.h is used because we use rand() directly instead of going through
fRandom(). Speaking of which, we use fRandom(), so Maths.h needs to be
included, too.
So, 2.3 added recoloring one-way tiles to no longer make them be always
yellow. However, custom levels that retexture the one-way tiles might
not want them to be recolored. So, if there are ANY custom assets
mounted, then the one-ways will not be recolored. However, if the XML
has a <onewaycol_override>1</onewaycol_override> tag, then the one-way
will be recolored again anyways.
When I added one-way recoloring, I didn't intend for any custom asset to
disable the recoloring; I only did it because I couldn't find a way to
check if a specific file was customized by the custom level or not.
However, I have figured out how to do so, and so now tiles.png one-way
recolors will only be disabled if there's a custom tiles.png, and
tiles2.png one-way recolors will only be disabled if there's a custom
tiles2.png.
In order to make sure we're not calling PhysFS functions on every single
deltaframe, I've added caching variables, tiles1_mounted and
tiles2_mounted, to Graphics; these get assigned every time
reloadresources() is called.
This function will check if a specific file is a mounted per-level
custom asset, instead of being a variable that's true if ANY file is a
mounted asset.
Now you only have to call one function (and pass it a tile number) to
figure out if you should recolor a one-way tile or not, and you don't
have to copy-paste.
It's only used in FileSystemUtils and never anywhere else, especially
not Graphics. Why is this on Graphics again?
It's now a static variable inside FileSystemUtils. It has also been
renamed to assetDir for consistency with saveDir and levelDir. Also,
it's a C string now, and is no longer an STL string.
There's no need to create an std::string for every single element just
to see if it's a key name.
At least in libstdc++, there's an optimization where std::strings that
are 16 characters or less don't allocate on the heap, and instead use
the internal 16-char buffer directly in the control structure of the
std::string. However, it's not guaranteed that all the element names
we'll get will always be 16 chars or less, and in case the std::string
does end up allocating on the heap, we have no reason for it to allocate
on the heap; so we should just convert these string comparisons to C
strings instead.
This bug is technically NOT a regression - the code responsible for it
has been around since the source release.
However, it hasn't been a problem until Graphic Options and Game Options
were added to the pause screen. Since then, if you opened the pause menu
in Flip Mode, pressing up would move to the menu option below, and
pressing down would move to the menu option above. Notably, left and
right still remain the same.
This is because the map screen input code assumes that the menu options
will be flipped around - however, this has never been the case. What
happens instead is that the menu options get flipped around time when in
Flip Mode - flipping what's already flipped - so it ends up the same
again.
(Incidentally enough, the up/down reversing code is present on the title
screen, and is correct - if you happen to set graphics.flipmode to true
on the title screen, the title screen doesn't negate the flipped menu
options, so pressing up SHOULD be treated like pressing down, and vice
versa. However, in 2.3, it's not really possible to set
graphics.flipmode to true on the title screen without using GDB or
modifying the game. In 2.2 and previous, you can just complete the game
in Flip Mode, and the variable won't be reset; 2.3 cleaned up all exit
paths to the menu to make sure everything got reset.)
This isn't a problem when there's only two options, but since 2.3 adds
two more options to the pause screen, it's pretty noticeable.
Anyway, this is fixed by simply removing the branch of the
graphics.flipmode if-else in mapinput(). The 'else' branch is now the
code that gets executed unconditionally. Don't get confused by the diff;
I decided to unindent in the same commit because it's not that many
lines of code.
This fixes a "root cause" bug (that's existed since 2.2 and below) where
recreated surfaces wouldn't preserve the blend mode of their original
surface.
The surface-level (pun genuinely unintended) bug that this root bug
fixes is the one where there's no background to the room name during the
map menu animation in Flip Mode.
This is because the room name background relies on graphics.backBuffer
being filled with complete black. This is achieved by a call to
ClearSurface() - however, ClearSurface() actually fills it with
transparent black (this is not a regression; in 2.2 and previous, this
was an "inlined" FillRect(backBuffer, 0x00000000)). This would be okay,
and indeed the room name background renders fine in unflipped mode - but
it suddenly breaks in Flip Mode.
Why? Because backBuffer gets fed through FlipSurfaceVerticle(), and
FlipSurfaceVerticle() creates a temporary surface with the same
dimensions and color masks as backBuffer - it, however, does NOT create
it with the same blend mode, and kind of sort of just forgets that the
original was SDL_BLENDMODE_NONE; the new surface is SDL_BLENDMODE_BLEND.
Thus, transparency applies on the new surface, and instead of the room
name being drawn against black, it gets drawn against transparency.
Here I'm using "surface recreation" to mean allocating a new surface
with almost the exact same properties as a given previous. As you can
see, GraphicsUtil likes to recreate surfaces all the time - copying the
masks and flags (unused lol) of an existing surface - and only varies it
by the dimensions of the new surface.
As you can see, this is a lot less wordy and a lot less repetitive than
copy-pasting it a bunch.
In normal mode, the room name is at the bottom of the screen. When you
bring up the map screen, it appears as if the room name is moving up
from the bottom of the screen, and the map screen is "pushing" it up.
The effect is pretty seamless, and when I first played the game (back in
2014), I thought it was pretty cool.
However, in Flip Mode, the room name is at the top of the screen. So one
would expect the menu animation to come from above the screen. Well, no,
it still goes from the bottom of screen; ruining the effect because it
seems like there are two room names on the screen, when there ought to
be only one.
To be fair, I only noticed this while fixing another bug now, but it's
one of those things you can't unsee (I have cursed you with knowledge!);
not to mention that I probably only didn't notice this because I don't
play in Flip Mode that often (and I'd wager almost no one does; Flip
Mode previous to 2.3 seems to have been really untested, like I said
in #165). It feels like a bit of an oversight that the direction of the
animation is the same direction as in unflipped mode. So I'm fixing
this.
If you stood in two activity zones at once, you'll automatically select
the one that got created first. And when you activated it, the activity
zone prompt would switch to fading out the prompt of the OTHER activity
zone, the one you didn't activate.
This wasn't a problem in 2.2 and previous, because the fading animation
was simply bugged and defaulted to being solid black. However, in 2.3,
the fading animation is fixed, so this is possible.
Also, this really only happens in the main game. Since there's only one
type of useful activity zone in custom levels - namely the terminal
activity zone - if two activity zones did happen to overlap, activating
one of them wouldn't result in visibly fading out a different activity
zone (because they both look the same); furthermore custom level makers
are careful to not overlap terminal activity zones, lest this result in
player confusion; furthermore the placed activity zones only cover a
small area, whereas in the main game, crewmates' activity zones are
pretty big.
(Technically, you CAN create main game activity zones in custom levels,
but those are hardcoded to call main game scripts, and basically nobody
uses them.)
So what's the solution? Simply adding game.hascontrol and script.running
checks to the updating of game.activity_last[prompt|r|g|b].
Why not add those checks to the assignment of game.activeactivity, just
above? Because that would introduce a frame ordering issue (that
would NOT be (automatically) fixed by #535) where the eligibility of
pressing Enter on an activity zone now checks if you were standing in an
activity zone LAST frame, and not THIS frame. (I tested this with
libTAS.) Better to fiddle with the rendering code than fiddle with the
actual physics code.
The specific spot I used to test this was standing in Violet's activity
zone and the activity zone of the ship radio terminals (the three
terminals on the ground in her room); the ship radio terminals are
first-placed, so if you're testing this (and you should!), make that the
prompt is of the ship radio activity zone before activation.
This probably should've been moved to RenderFixed a while ago, because
it's unnecessary to run this on every single deltaframe.
The only minor wrinkle here is that this means rendering of activity
zone fades will be delayed for 1 frame, but #535 will fix that.
Since you're now allowed to bring up the map screen during cutscenes,
you've also been able to activate activity zones and teleporter prompts
during cutscenes. This only really affects custom levels; nowhere in the
main game can you overlap with an activity zone while in a cutscene.
To fix this, I've just added a script.running check to Enter keybind
processing.
I was looking through all calls to game.returnmenu(), and I noticed that
the return option in the game pad screen didn't have a
map.nexttowercolour(). I tested it and, yep, returning from there
doesn't update the background color.
So that should be fixed now.
I'm... not sure why this was here? It's absolutely not needed.
I'm guessing maybe at one point during development, there might have
been wanted a special song to be played during the credits, or no song
at all (although the function being niceplay() instead of play() seems
to support the first possibility) - but there's no need for this to be
here.
Now that recreating the same menu keeps currentmenuoption, we can remove
all these superfluous assignments. This means repeating ourselves less;
in case the option numbers change in the future, we won't have to
remember to update these reassignments, too.
When recreating the same menu, there's basically no reason to reset the
currently-selected menu option. (Also, no need to worry about indexing
out of bounds or anything - the number gets checked while iterating over
all menu options; it's never used to actually index anything. At worst
there might be a 1-frame flicker as the bounds code in gameinput() kicks
in, but that shouldn't happen anyways.)
Zip files that have been successfully mounted in editorclass::loadZips()
will now be ignored when the game does its second pass over the levels
directory. Otherwise, this would produce a superfluous error message,
because the game would attempt to parse the zip file as a level file
(when it's not a level file and is in fact a binary file).
This returns if the file given is mounted or not. 2.3 added level zip
support, so whenever the game loads level metadata, it will mount any
zip files in the levels directory; this function can be used to check if
any of those files have been mounted, and ignore them if so.
Otherwise, this would produce a superfluous warning message in the
console. Directories are now ignored and never attempted to be opened;
so now any warning messages printed out are genuine file that something
has genuinely gone wrong with.
Well, there's still a warning message printed if there's a symlink to a
directory; this is rarer, but it's still a false positive.
This function will be used to differentiate files from directories.
Or at least that was the hope. Symlink support was added in 2.3, but it
doesn't seem like PHYSFS_stat() lets you follow the symlink to check if
what it points to is itself a file or directory. And there doesn't seem
to be any function to follow the symlink yourself...
So for now, this function considers symlinks to directories to be files.
PHYSFS_readBytes() returns a PHYSFS_sint64, but we forcefully shove it
into a 32-bit signed integer.
Fixing the type of this doesn't have any immediate consequences, but
it's good for the future in case we want to use the return value for
files bigger than 2 gigabytes; it doesn't harm us in any way, and it's
just better housekeeping.
PHYSFS_fileLength() returns -1 if the file size can't be determined. I'm
going to set it to 0 instead, because it seems like that's more
well-behaved with consumers.
Take lodepng_decode24() or lodepng_decode32(), for example - from a
quick glance at the source, it only takes in a size_t (an unsigned
integer) for the filesize, and one of the first things it does is malloc
with the given filesize. If the -1 turns into SIZE_MAX and LodePNG
attempts to allocate that many bytes... well, I don't know of any
systems that have 18 exabytes of memory. So that seems pretty bad.
The function returns a PHYSFS_sint64, but we forcefully shove it into a
PHYSFS_uint32. This means we throw away all the negative numbers, which
is bad because the function returns -1 if the size of the file can't be
determined; plus, we also throw away 32 bits of information, reducing
our range of supported file sizes from 9 exabytes to 4 gigabytes.
File size support is only as good as the weakeast link, and it looks
like one of the consumers of FILESYSTEM_loadFileToMemory(),
SDL_RWFromConstMem(), only takes in a signed 32-bit integer of size;
however, I would still like to do at least the bare minimum to support
as many file sizes as we can, and changing types around is one of those
bare minimums.
I had misread this line in #629 and thought that it was just clearing
the entire surface, when really it was filling the surface with opaque
black. ClearSurface() would instead make it transparent, which would
mean when it got drawn, it would get drawn against blue, and not black.
Whoops.
These float attributes are assigned to, and then never read again. The
coordinate systems of blocks are a bit of a mess - some use xp/yp, some
use xp/yp and rect.x/rect.y - but I can confidently say that these are
never used, because it compiles fine if I remove the attributes from the
class, plus remove all assignments to it.
Screen.cpp wasn't explicitly including SDL.h, instead relying on
Screen.h to include it.
It was also relying on SDL.h to include stdio.h on Linux, which breaks
because SDL.h doesn't include stdio.h on Windows. So stdio.h is now
explicitly included as well.
stdlib.h is not used in this file.
After reasoning about it for a bit, there's no reason for these checks
to be here. `zip_normal` will either be
/home/infoteddy/.local/share/VVVVVV/levels if the asset directory is a
directory, or levels/levelname.zip if the asset directory is inside the
same zip as the level is. I don't see how they could ever be data.zip.
My guess is because of the VCE bug where it messed up its search path,
and before that bug was fixed, it had to be worked around here by
explicitly blacklisting data.zip here. When the assets mounting stuff
was ported from VCE to vanilla, vanilla didn't have the problem, and so
this data.zip blacklisting stuff was unnecessary.
Either way, I see no reason for this, so I'm going to remove it.
There is no need to use heap-allocated strings here, so I've refactored
them out. I've also cleaned up both of the functions a bit, because the
line spacing of the previous version was completely non-existent, brace
style was same-line instead of next-line, and the variable names were a
bit misleading (in FILESYSTEM_mountassets(), there is a `zippath` AND a
`zip_path`, which are two completely different variables).
Also, FILESYSTEM_mount() now prints an error message and bails if
PHYSFS_getRealDir() returns NULL, whereas it didn't do that before.
The function is literally just an alias for PHYSFS_exists(), which does
not exclusively check for directories. Plus, the function is also used
to check if a non-directory file exists. Why is this function named
"directoryExists"?!
The info message when a .data.zip file is mounted is now differentiated
from the message when an actual directory is mounted (the .data.zip
message specifies ".data.zip").
The error message for an error occurring when loading or mounting a .zip
is now capitalized.
The "Custom asset directory does not exist" now uses puts(), because
there's no need to use printf() here.
I don't know why this is here; it's unused. I don't know why the
compiler doesn't warn about this being unused either - maybe it's
secretly being used? That also means I'm not sure if the compiler is
optimizing this away or not. Anyway, this is getting removed.
The STL here cannot be completely eliminated (because the custom entity
object uses std::string), but at least we can avoid unnecessarily making
std::strings until the very end.
There's not really any reason for this function to use heap-allocated
strings. So I've refactored it to not do that.
I would've used SDL_strrstr(), if it existed. It does not appear to
exist. But that's okay.
PhysFS by default just uses system malloc(), realloc(), and free(); it
provides a way to change them, with a struct named PHYSFS_Allocator and
a function named PHYSFS_setAllocator().
According to PhysFS docs, this function should be called before
PHYSFS_init(), which is why this allocator stuff is handled in
FileSystemUtils.cpp.
Also, I've had to make two "bridge" functions, because PHYSFS_Allocator
wants pointers to functions taking in `PHYSFS_uint64`s, not `size_t`s.
ClearSurface() is less verbose than doing it the old way, and also
conveys intent clearer. Plus, some of these FillRect()s had hardcoded
width and height values, whereas ClearSurface() doesn't - meaning this
change also has better future-proofing, in case the widths and heights
of the surfaces involved change in the future.
When you pass NULL in for the SDL_Rect* parameter to SDL_FillRect(), SDL
will automatically fill the entire surface with that color. There's no
need for us to create the SDL_Rect ourselves.
This is a function that does what it says - it clears the given surface.
This just means doing a FillRect(), but it's better to use this function
because it conveys intent better.
This is pretty old commented-out code from earlier versions of the game;
they are no longer useful, and are just distracting. If we need them, we
can always refer back to this commit (but I sincerely doubt that we'll
need them).
Apparently in C, if you have `void test();`, it's completely okay to do
`test(2);`. The function will take in the argument, but just discard it
and throw it away. It's like a trash can, and a rude one at that. If you
declare it like `void test(void);`, this is prevented.
This is not a problem in C++ - doing `void test();` and `test(2);` is
guaranteed to result in a compile error (this also means that right now,
at least in all `.cpp` files, nobody is ever calling a void parameter
function with arguments and having their arguments be thrown away).
However, we may not be using C++ in the future, so I just want to lay
down the precedent that if a function takes in no arguments, you must
explicitly declare it as such.
I would've added `-Wstrict-prototypes`, but it produces an annoying
warning message saying it doesn't work in C++ mode if you're compiling
in C++ mode. So it can be added later.
One of these days, I need to get around to running Include What You Use
on this codebase. Until then, while I was working on #624, I noticed
these; I'm removing them now.
The recently released SDL 2.0.14 adds a native function for opening URIs
from the host system, superseding the OS-specific implementations of
FILESYSTEM_openDirectory.
This fixes a regression where moving platforms had no collision. Because
their width and height would be maintained, but their type would be -1.
(Also because I didn't test enough.)
In #565, I decided to set blocks' types to -1 when disabling them, to be
a bit safer in case there was some code that used block types but not
their width and heights. However, this means that when blocks get
disabled and re-created in the platform update loops, their types get
set to -1, which effectively also disables their collision.
In the end, I'll just have to compromise and remove setting blocks to
type -1. Because in a better world, we shouldn't be destroying and
creating blocks constantly just to move some platforms - however, fixing
such a fundamental problem is beyond the scope of at least 2.3 (there's
also the fact that this problem also results in some bugs that are a
part of compatibility, whether we like it or not). So I'll just remove
the -1.
next_split_s() could potentially commit out-of-bounds indexing if the
amount of source data was bigger than the destination data.
This is because the size of the source data passed in includes the null
terminator, so if 1 byte is not subtracted from it, then after it passes
through the VVV_min(), it will index 1 past the end of the passed buffer
when null-terminating it.
In contrast, the other argument of the VVV_min() does not need 1
subtracted from it, because that length does not include a null
terminator (next_split() returns the length of the substring, after all;
not the length of the substring plus 1).
(The VVV_min() here also shortens the range of values to the size of an
int, but we'll probably make size_t versions anyway; plus who really
cares about supporting massively-sized buffers bigger than 2 billion
bytes in length? That just doesn't make sense.)
If PHYSFS_enumerate() isn't successful, we now print that it wasn't
successful, and print the PhysFS error message. (We should get that
logging thing going sometime...)
Note that level dir listing still uses plenty of STL (including the end
product - the `LevelMetaData` struct - which, for the purposes of 2.3,
is okay enough (2.4 should remove STL usage entirely)); it's just that
the initial act of iterating over the levels directory no longer takes
four or SIX(!!!) heap allocations (not counting reallocations and other
heap allocations this patch does not remove), and no longer does any
data marshalling.
Like text splitting, and binary blob extra indice grabbing, the current
approach that FILESYSTEM_getLevelDirFileNames() uses is a temporary
std::vector of std::strings as a middleman to store all the filenames,
and the game iterates over that std::vector to grab each level metadata.
Except, it's even worse in this case, because PHYSFS_enumerateFiles()
ALREADY does a heap allocation. Oh, and
FILESYSTEM_getLevelDirFileNames() gets called two or three times. Yeah,
let me explain:
1. FILESYSTEM_getLevelDirFileNames() calls PHYSFS_enumerateFiles().
2. PHYSFS_enumerateFiles() allocates an array of pointers to arrays of
chars on the heap. For each filename, it will:
a. Allocate an array of chars for the filename.
b. Reallocate the array of pointers to add the pointer to the above
char array.
(In this step, it also inserts the filename in alphabetically -
without any further allocations, as far as I know - but this is a
COMPLETELY unnecessary step, because we are going to sort the list
of levels by ourselves via the metadata title in the end anyways.)
3. FILESYSTEM_getLevelDirFileNames() iterates over the PhysFS list, and
allocates an std::vector on the heap to shove the list into. Then,
for each filename, it will:
a. Allocate an std::string, initialized to "levels/".
b. Append the filename to the std::string above. This will most
likely require a re-allocation.
c. Duplicate the std::string - which requires allocating more memory
again - to put it into the std::vector.
(Compared to the PhysFS list above, the std::vector does less
reallocations; it however will still end up reallocating a certain
amount of times in the end.)
4. FILESYSTEM_getLevelDirFileNames() will free the PhysFS list.
5. Then to get the std::vector<std::string> back to the caller, we end
up having to reallocate the std::vector again - reallocating every
single std::string inside it, too - to give it back to the caller.
And to top it all off, FILESYSTEM_getLevelDirFileNames() is guaranteed
to either be called two times, or three times. This is because
editorclass::getDirectoryData() will call editorclass::loadZips(), which
will unconditionally call FILESYSTEM_getLevelDirFileNames(), then call
it AGAIN if a zip was found. Then once the function returns,
getDirectoryData() will still unconditionally call
FILESYSTEM_getLevelDirFileNames(). This smells like someone bolting
something on without regard for the whole picture of the system, but
whatever; I can clean up their mess just fine.
So, what do I do about this? Well, just like I did with text splitting
and binary blob extras, make the final for-loop - the one that does the
actual metadata parsing - more immediate.
So how do I do that? Well, PhysFS has a function named
PHYSFS_enumerate(). PHYSFS_enumerateFiles(), in fact, uses this function
internally, and is basically just a wrapper with some allocation and
alphabetization.
PHYSFS_enumerate() takes in a pointer to a function, which it will call
for every single entry that it iterates over. It also lets you pass in
another arbitrary pointer that it leaves alone, which I use to pass
through a function pointer that is the actual callback.
So to clarify, there are two callbacks - one callback is passed through
into another callback that gets passed through to PHYSFS_enumerate().
The callback that gets passed to PHYSFS_enumerate() is always the same,
but the callback that gets passed through the callback can be different
(if you look at the calling code, you can see that one caller passes
through a normal level metadata callback; the other passes through a zip
file callback).
Furthermore, I've also cleaned it up so that if editorclass::loadZips()
finds a zip file, it won't iterate over all the files in the levels
directory a third time. Instead, the level directory only gets iterated
over twice - once to check for zips, and another to load every level
plus all zips; the second time is when all the heap allocations happen.
And with that, level list loading now uses less STL templated stuff and
much less heap allocations.
Also, ed.directoryList basically has no reason to exist other than being
a temporary std::vector, so I've removed it. This further decreases
memory usage, depending on how many levels you have in your levels
folder (I know that I usually have a lot and don't really ever clean it
up, lol).
Lastly, in the callback passed to PhysFS, `builtLocation` is actually no
longer hardcoded to just the `levels` directory, since instead we now
use the `origdir` variable that PhysFS passes us. So that's good, too.
If PHYSFS_mountHandle() failed to mount a zip file, we would print
PhysFS's error message straight, without any surrounding context. This
seems a little weird, and doesn't maximize understanding for readers;
I've made it so now the error message is "Could not mount <zip file>:
<PhysFS error>".
When Ethan added PhysFS to the game, he put in a hardcoded check (marked
with a FIXME) that explicitly removed all filenames that were "data"
returned by PHYSFS_enumerateFiles(). Apparently this was due to a weird
bug with the function putting in "data" strings in its output in PhysFS
2.0.3; however, the game now uses PhysFS 3.0.2, and I could not
reproduce this bug on my system. (I also tested, and this also
straight-up ignores legitimate level filenames that just happen to be
"data" (without the .vvvvvv extension).)
After talking with Ethan in Discord DMs, I asked if we could remove this
check, and he said that we could. So I'm doing it now.
Just like I refactored text splitting to no longer use std::vectors,
std::strings, or temporary heap allocations, decreasing memory usage and
improving performance; there's no reason to use a temporary
heap-allocated std::vector to grab all extra binary blob indices, when
instead the iteration can just be more immediate.
Instead, what I've done is replaced binaryBlob::getExtra() with
binaryBlob::nextExtra(), which takes in a pointer to an index variable,
and will increment the index variable until it reaches an extra track.
After the caller processes the extra track, it is the caller's
responsibility to increment the variable again before passing it back to
getExtra().
This avoids all heap allocations and brings down the memory usage of
processing extra tracks.
If you configure the build with -DBUNDLE_DEPENDENCIES=OFF, then VVVVVV
will dynamically link with TinyXML-2 and PhysicsFS instead of using the
bundled source code in third_party/ and statically linking with them.
Unfortunately, it doesn't seem like distros package LodePNG, and LodePNG
isn't intended to be packaged, so we can't dynamically link with it, nor
can we use some system LodePNG header files somewhere else because those
don't exist.
UTF8-CPP is a special case, because no matter what, it's going to be
statically linked with the binary (it doesn't come as a shared object
file in any way). So with -DBUNDLE_DEPENDENCIES=OFF, we will use the
system UTF8-CPP header files instead of the bundled ones, but it will
still be statically linked in with the binary.
The main motivation for doing this is so if VVVVVV ever gets packaged in
distros, distro maintainers would be more likely to accept it if there
was an option to compile the game without bundled dependencies. Also, it
discourages modifying the third-party dependencies we have, because it's
always possible for someone to compile those dependencies without our
changes, with this CMake option.
This patch restores some 2.2 behavior, fixing a regression caused by the
refactor of properly using std::vectors.
In 2.2, the game allocated 200 items in obj.entities, but used a system
where each entity had an `active` attribute to signify if the entity
actually existed or not. When dealing with entities, you would have to
check this `active` flag, or else you'd be dealing with an entity that
didn't actually exist. (By the way, what I'm saying applies to blocks
and obj.blocks as well, except for some small differing details like the
game allocating 500 block slots versus obj.entities's 200.)
As a consequence, the game had to use a separate tracking variable,
obj.nentity, because obj.entities.size() would just report 200, instead
of the actual amount of entities. Needless to say, having to check for
`active` and use `obj.nentity` is a bit error-prone, and it's messier
than simply using the std::vector the way it was intended. Also, this
resulted in a hard limit of 200 entities, which custom level makers ran
into surprisingly quite often.
2.3 comes along, and removes the whole system. Now, std::vectors are
properly being used, and obj.entities.size() reports the actual number
of entities in the vector; you no longer have to check for `active` when
dealing with entities of any sort.
But there was one previous behavior of 2.2 that this system kind of
forgets about - namely, the ability to have holes in between entities.
You see, when an entity got disabled in 2.2 (which just meant turning
its `active` off), the indices of all other entities stayed the same;
the indice of the entity that got disabled stays there as a hole in the
array. But when an entity gets removed in 2.3 (previous to this patch),
the indices of every entity afterwards in the array get shifted down by
one. std::vector isn't really meant to be able to contain holes.
Do the indices of entities and blocks matter? Yes; they determine the
order in which entities and blocks get evaluated (the highest indice
gets evaluated first), and I had to fix some block evaluation order
stuff in previous PRs.
And in the case of entities, they matter hugely when using the
recently-discovered Arbitrary Entity Manipulation glitch (where crewmate
script commands are used on arbitrary entities by setting the `i`
attribute of `scriptclass` and passing invalid crewmate identifiers to
the commands). If you use Arbitrary Entity Manipulation after destroying
some entities, there is a chance that your script won't work between 2.2
and 2.3.
The indices also still determine the rendering order of entities
(highest indice gets drawn first, which means lowest indice gets drawn
in front of other entities). As an example: let's say we have the player
at 0, a gravity line at 1, and a checkpoint at 2; then we destroy the
gravity line and create a crewmate (let's do Violet).
If we're able to have holes, then after removing the gravity line, none
of the other indices shift. Then Violet will be created at indice 1, and
will be drawn in front of the checkpoint.
But if we can't have holes, then removing the gravity line results in
the indice of the checkpoint shifting down to indice 1. Then Violet is
created at indice 2, and gets drawn behind the checkpoint! This is a
clear illustration of changing the behavior that existed in 2.2.
However, I also don't want to go back to the `active` system of having
to check an attribute before operating on an entity. So... what do we
do to restore the holes?
Well, we don't need to have an `active` attribute, or modify any
existing code that operates on entities. Instead, we can just set the
attributes of the entities so that they naturally get ignored by
everything that comes into contact with it. For entities, we set their
invis to true, and their size, type, and rule to -1 (the game never uses
a size, type, or rule of -1 anywhere); for blocks, we set their type to
-1, and their width and height to 0.
obj.entities.size() will no longer necessarily equal the amount of
entities in the room; rather, it will be the amount of entity SLOTS that
have been allocated. But nothing that uses obj.entities.size() needs to
actually know the amount of entities; it's mostly used for iterating
over every entity in the vector.
Excess entity slots get cleaned up upon every call of
mapclass::gotoroom(), which will now deallocate entity slots starting
from the end until it hits a player, at which point it will switch to
disabling entity slots instead of removing them entirely.
The entclass::clear() and blockclass::clear() functions have been
restored because we need to call their initialization functions when
reusing a block/entity slot; it's possible to create an entity with an
invalid type number (it creates a glitchy Viridian), and without calling
the initialization function again, it would simply not create anything.
After this patch is applied, entity and block indices will be restored
to how they behaved in 2.2.
Just like is_positive_num(), an empty string is not a number.
I've also decided to unroll iteration 0 of the loop here so readability
is improved; this happens to also knock out the whole "accepting empty
string" thing, too.
To account for empty strings, we simply have to special-case them.
Simple as that.
This was also a problem with the previous std::string implementation of
this function; regardless, this is fixed now.
The current way "arrays" from XML files are loaded (before this commit
is applied) goes something like this:
1. Read the buffer of the contents of the tag using TinyXML-2.
2. Allocate a buffer on the heap of the same size, and copy the
existing buffer to it. (This is what the statement `std::string
TextString = pText;` does.)
3. For each delimiter in the heap-allocated buffer...
a. Allocate another buffer on the heap, and copy the characters from
the previous delimiter to the delimiter you just hit.
b. Then allocate the buffer AGAIN, to copy it into an std::vector.
4. Then re-allocate every single buffer YET AGAIN, because you need to
make a copy of the std::vector in split() to return it to the caller.
As you can see, the existing way uses a lot of memory allocations and
data marshalling, just to split some text.
The problem here is mostly making a temporary std::vector of split text,
before doing any actual useful work (most likely, putting it into an
array or ANOTHER std::vector - if the latter, then that's yet another
memory allocation on top of the memory allocation you already did; this
memory allocation is unavoidable, unlike the ones mentioned earlier,
which should be removed).
So I noticed that since we're iterating over the entire string once
(just to shove its contents into a temporary std::vector), and then
basically iterating over it again - why can't the whole thing just be
more immediate, and just be iterated over once?
So that's what I've done here. I've axed the split() function (both of
them, actually), and made next_split() and next_split_s().
next_split() will take an existing string and a starting index, and it
will find the next occurrence of the given delimiter in the string. Once
it does so, it will return the length from the previous starting index,
and modify your starting index as well. The price for immediateness is
that you're supposed to handle keeping the index of the previous
starting index around in order to be able to use the function; updating
it after each iteration is also your responsibility.
(By the way, next_split() doesn't use SDL_strchr(), because we can't get
the length of the substring for the last substring. We could handle this
special case specifically, but it'd be uglier; it also introduces
iterating over the last substring twice, when we only need to do it
once.)
next_split_s() does the same thing as next_split(), except it will copy
the resulting substring into a buffer that you provide (along with its
size). Useful if you don't particularly care about the length of the
substring.
All callers have been updated accordingly. This new system does not make
ANY heap allocations at all; at worst, it allocates a temporary buffer
on the stack, but that's only if you use next_split_s(); plus, it'd be a
fixed-size buffer, and stack allocations are negligible anyway.
This improves performance when loading any sort of XML file, especially
loading custom levels - which, on my system at least, I can noticeably
tell (there's less of a freeze when I load in to a custom level with
lots of scripts). It also decreases memory usage, because the heap isn't
being used just to iterate over some delimiters when XML files are
loaded.
These comments were probably remnants of some late-night coding session
or something. Anyway, they're not needed; there's nothing to do with SDL
here, and the "Init" is obvious because the function is a constructor.
Contents and scripts should be reset in editorclass::reset(); there's no
reason to reset them again right before you load them from an XML file
in editorclass::load().
Additionally, the resets now consistently use SDL_zeroa() (for contents)
and scriptclass::clearcustom() (for scripts).
I'm partial to slash-asterisk-style comments, so I'll use those here.
Also, having a space after the start of comments is good. I've also
removed the "Add the script if we have a preceding header" comments
since it can be inferred by reading the surrounding code.
Instead of checking the length() of an std::string, just check if
pText[0] is equal to '\0'.
This will have to be done anyway, because I'm going to get rid of the
std::string allocation here, and I noticed this inefficiency in the
indentation, so I'm going to remove it.
The actual unindent will be done in the next commit.
This now means every XML array loading is done with common,
re-duplicated code. The only exceptions to this are special cases other
than the the majority of cases; the majority being a simple matter of
reading an array of integers and putting it into another array.
Seems like the only reason I hadn't caught the <customlevelscore> tag
until now was because I was focused on de-duplicating all the array
loads in Game::loadstats() and below, forgetting about
Game::loadcustomlevelstats().
In order to be able to use the LOAD_ARRAY() and LOAD_ARRAY_RENAME()
macros in Game::loadcustomlevelstats(), they have to be moved to earlier
in the file.
Even if split() didn't use the STL, using this function here is a bit
unnecessary, because a simple SDL_strchr() suffices. Refactoring split()
to not use the STL will break this caller anyway, so I might as well
just refactor this to not use split() in the first place.
This refactor also properly checks if the inputs are valid integers. And
since split() is no longer used, it also rejects inputs ending with a
trailing comma as being invalid, too; this didn't happen previously.
It's intentional that I used is_number() here instead of
is_positive_num(), thus accepting negative numbers; in the future it
might be possible to have negative room coordinates.
Valgrind reported this.
The error here is that the buffer here is only guaranteed to be
initialized up until (and including) the null-terminator, by
SDL_snprintf(). Iterating over the entire allocated buffer is bad and I
should feel bad as the girl who wrote this code; doing that reads
uninitialized memory and passes it to SDL_tolower().
As a bonus, the iterator increment is now a preincrement instead of a
postincrement.
This fixes memory leaking every single time a file gets loaded(!) when
the list of custom levels gets loaded(!!!), which Valgrind reports. This
memory leak is completely my bad; 2.2 properly frees the loaded file,
and VCE uses an std::unique_ptr - which I decided to ignore and not
think about why it would be there.
It's safe to do this free after uMem gets copied into std::string;
although, in the future, I *am* thinking about refactoring this function
(and the tag finder function) to not use std::strings, and I'll have to
be careful to make sure that the memory management with the file is
correct when I do so.
This makes the freesrc argument of Mix_LoadMUS_RW() 1 instead of 0. If
the argument is nonzero, then the passed SDL_RWops will be automatically
freed when m_music is freed, too.
I don't know why this was 0 before. Setting it to 1 fixes a memory leak
that Valgrind reports (which turns into an actual leak every time custom
assets are mounted or unmounted).
This adds a check that the pointer passed to
FILESYSTEM_loadFileToMemory() isn't NULL, and if it is, just returns
early in the function, instead of continuing later and producing a
different, slightly-misleading error message.
Previously, it was guarded behind a check for the length, which is... I
guess still perfectly fine behavior, but there's no reason to have a
length check here; FILESYSTEM_freeMemory() uses SDL_free(), which does a
check that the pointer passed is non-NULL (the pointer that is passed
here, despite not being initialized upon declaration, is guaranteed to
be initialized by FILESYSTEM_loadFileToMemory() anyway, so).
Following Ethan's example of bailing (calling VVV_exit()) if
binaryBlob::unPackBinary() couldn't allocate memory, I've searched
through and found every SDL_malloc(), then made sure that if it returned
NULL, the caller would bail (because you can't do much when you're out
of memory).
There should probably be an error message printed when the process is
out of memory, but unPackBinary() doesn't print an error message for
being out of memory, so this can probably be added later. (Also we don't
really have a logging system, I'd like to have something like that added
in first before adding more messages.)
Also, this doesn't account for any allocators used by STL stuff, but
we're working on removing the STL, and allocation failure just results
in an abort anyway, so there's not really a problem there.
Wow, there are a lot of these. All of these exit paths now use
VVV_exit() instead, which attempts to save unlock.vvv and settings.vvv,
and also frees all resources so Valgrind is happy. This is a good thing,
because previously unlock.vvv/settings.vvv wouldn't be written to if we
decided to bail for a given reason.
It should be between the include of the corresponding header file for
the source file (Script.h) and the includes of other local header files
(the files that are specific to this codebase only); this is the
convention that includes in all other source files follow.
However, it seems like I misplaced this, so I'm fixing it now.
This is just a function that calls the cleanup() in main.cpp, as well as
calls exit().
I would have liked to use SDL_ExitProcess() here, because that function
has ifdefs for different runtime environments. But alas, it's an
internal function and isn't exported. Ah well; exit() seems to be fine
anyway.
If there's a resource that doesn't otherwise need to be cleaned up and
is still alive upon program shutdown, then it should go in cleanup().
This cleans up Screen, GraphicsResources, Graphics buffers, Graphics
tiles, and musicclass audio upon program shutdown.
Even we technically don't NEED to clean these resources up ourselves
(the kernel is going to get rid of all of it anyway, else it'd be a
security problem), I'm doing this because otherwise Valgrind will
complain about these, and then it'd be difficult to see which memory
leaks are real and which are just "well this isn't really a leak but you
haven't freed this thing when the process exited, and that's technically
what a memory leak is".
These are all resources whose cleanup functions can be safely called
even if they haven't initialized anything yet.
This isn't a memory leak (not even Valgrind complains), because it gets
properly cleaned up in GraphicsResources::destroy(). Still, it's memory
that is just laying around not being used, and in the name of
deallocating things as soon as you no longer need them, we should
deallocate the base tilesheet images after we split all of them into
tiles.
This reduces the memory cost of all tilesheet images by half, since we
were essentially keeping around duplicates for nothing; this doesn't
really have much of an impact with conventional tilesheet sizes, since
they're usually small enough, but since 2.3 allowed for tilesheet images
of any size, this is a pretty big deal for really big tilesheet images.
It's okay to do this, even though they also get freed in
GraphicsResources::destroy(), because SDL_FreeSurface() does a NULL
check on the pointer passed to it, and we set the pointer to NULL after
freeing the surfaces.
A quick glance at PhysFS source code will show that PhysFS will bail if
PHYSFS_deinit() is called if it's not initialized.
"Bail" here just means setting an error code and returning early, so
it's not that bad. Still, it's the principle of the thing, and I just
want to ensure that FILESYSTEM_deinit() can be safely called no matter
if the filesystem hasn't initialized yet; having an error set by PhysFS
kind of taints the whole safety thing, even if it does nothing wrong,
no?
(although, speaking of which, we should be handling all errors by
PhysFS, but that's for later...)
These FIXME comments are still correct about code duplication, but
they're incorrect about where exactly the original code is after the
original code got moved around. So I've fixed them to refer to the
correct locations.
We really should get around to de-duplicating the code mentioned in
these comments...
Since musicWriteBlob is a temporary object that gets destroyed at the
end of musicclass::init(), in order to make sure we don't leak memory
and lose all the pointers to the blocks we just allocated in
musicWriteBlob, we need to call its clear() method after writing
BinaryMusic.vvv.
musicReadBlob was used for both MMMMMM and PPPPPP soundtracks. This
causes a memory leak if you have mmmmmm.vvv installed, because the
pointers holding each allocated block of MMMMMM would be lost when
PPPPPP got loaded. Valgrind complains about this memory leak.
This is in contrast to 2.2 and previous behavior, where musicReadBlob
was only a temporary object instead of being held in musicclass.
However, this wasn't really a memory leak (moreso something that just
didn't get cleaned up when closing the game), but it did get turned into
a leak when per-level assets mounting and unmounting got introduced in
2.3 (loading a level with custom assets after starting the game with an
mmmmmm.vvv, or exiting out of a level that had an mmmmmm.vvv, would
cause the game to leak memory). Leo recognized this, and moved
musicReadBlob onto musicclass in a separate 2.3 PR, but either he didn't
think about what was happening here too closely, or he didn't use
Valgrind, because he forgot about the memory leak caused by re-using the
same binaryBlob for PPPPPP and MMMMMM.
So instead, just use two different binaryBlob objects for MMMMMM and
PPPPPP. That way, no memory leaks happen.
I'm going to introduce another binaryBlob object in to the mix, and I
want to be able to re-use an existing FOREACH_TRACK #define without
having to copy-paste it again. So, TRACK_NAMES now takes in a blob
parameter, which will be passed to the temporary FOREACH_TRACK #define.
This removes the music cleanup code from musicclass::init(), and
requires that we also call destroy() in Graphics::reloadresources().
This is because we'll need to re-use the musicclass cleanup code
elsewhere, and we don't want to copy-paste the cleanup code. Or at
least, I don't (but I'm not a game dev, game devs copy-paste all the
friggin' time).
It doesn't feel quite write leaving all the buffer creation code in
main(), even though it's perfectly okay to do so and it doesn't result
in any memory mismanagement that Valgrind can report; so I'm factoring
all of it out to a separate function, Graphics::create_buffers().
As a bonus, we no longer have to keep qualifying with `graphics.` in the
buffer creation code, which is nice.
These destroy all the buffers that are created on the Graphics class.
Since these buffers can't be created at the same time as the rest of
Graphics is (due to the fact that they require knowing the pixel format
of the game screen), they can't be destroyed at the same as the rest of
Graphics is, either.
This is a very complicated way of zeroing out grphx (instead of using
SDL_zero()), which itself is completely unnecessary because grphx.init()
gets called immediately afterwards anyway.
It should be next-line brace, not same-line brace. Even in a codebase
that uses same-line braces everywhere, I still prefer having next-line
braces inside functions (because they're at the top level, and you can't
next them). But regardless, this should still be next-line brace like
(most of) the rest of the codebase.
The function previously conditionally freed a m_memblocks pointer if its
corresponding m_headers was valid. This makes me slightly worried about
the possibility that memory would be allocated, but the header would
still be marked as invalid.
I don't see how that could happen, but it's better to be safe than
sorry. SDL_free() does a guaranteed NULL pointer check (like most SDL
functions), so it's okay to pass NULL pointers to it.
Just to be sure, I'm also zeroing m_memblocks and m_headers after
freeing everything in the function.
MSVC complains about these, doesn't seem like GCC does. These can be
safely removed because they're unreachable, and they always follow a
case-switch or similar that has a default case which this code is a
duplicate of anyway. (Unless it isn't, in which case all the better to
remove it, becausee otherwise it looks misleading or confusing to casual
glances at the code.)
find_tag() would commit out-of-bounds indexing if someone made a level
file with malformed XML entity encodings in the metadata tags.
This would happen if the end of the string followed immediately after an
ampersand and hash, or if there wasn't a semicolon ending an XML entity.
Valgrind complains about these, so I've fixed it.
This fixes a bug where "12" gets properly evaluated as 12, but "148"
gets evaluated as 1408. It's because `place` gets multiplied by `radix`
again, so `retval` gets multipled by 100 instead of 10.
There's no reason to have a `place` variable, so I've removed it
entirely. This simplifies the function a little bit.
The previous person who wrote this (a girl named Misa) clearly didn't
understand the reason why you couldn't compare line[line.length()-1]
directly to a string literal. It's because the former is a char, and the
latter is a pointer to a char. Both are ints, so it compiles fine, but
it doesn't do what you want it to.
Why not just make the latter a char instead of a string literal? Well,
because you can, but also I clearly didn't think this through earlier,
so that's why I didn't do it in the first place.
But this is fixed now.
This avoids an unnecessary copy of the input std::vector, since we don't
need to modify it for anything. This cuts down on unnecessary memory
operations.
Apart from the std::string, this function no longer uses the STL.
ss_toi() is a simple function - it converts the input into an int,
taking as many digits as possible until it reaches a non-digit
character, at which point it stops. It's trivial to implement this
without the STL.
I could've used Int() here, but that would've required copying the
string to a temporary buffer to insert a null-terminator (we can't just
use a pointer-and-length data type either, the string functions don't
operate like that - one disadvantage of C strings!). Instead, I decided
to implement my own conversion to int here, because I don't think the
way we humans write our Arabic numerals is going to change anytime soon.
Also, the std::string input is now passed by const reference, instead of
making a copy - cutting down on unnecessary memory operations.
I personally like putting the asterisk with the type, because despite
the language parsing the asterisk as a part of the name, the pointer
part is clearly a part of the return type of the function. Also,
put constness here, to indicate that the input won't be modified inside
the function.
This comment indicates that the function is used by
UtilityClass::GCString(). Which is unnecessary, because the reader can
trivially search for usages of GCChar in the file itself (the 'static'
preceding the function should be a good enough hint) - and if there
aren't any, then the reader will know the function is unused, whereas if
they read the comment, they would have been under the assumption that it
wasn't used. (There might also a compiler warning about it being unused,
which would be more confusing if the comment was still there.)
Point is, comments can get outdated, so removing the comment here makes
the code more self-documenting.
This is a re-do of 942217f871 (#509), but
with a more conservative fix that only resets the player's newxp and
newyp when they respawn from a checkpoint or spawn in to the map.
Unlike the previous patch, if the player were to suddenly collide with a
conveyor or horizontally-moving platform during gameplay, their
y-position would revert back to the intended next y-position of the
previous frame. But this is the same behavior as before, I haven't ever
seen such a contrived situation come up, and this behavior is probably
more preferable for gameplay than actually going to the conveyor, so
it's fine.
I also decided to reset newxp here, and not just newyp, because while
resetting newyp seems to be enough, it's safer to also reset newxp (and
so future readers won't question why only newyp is reset but not newxp).
I tested this and it once again fixes the death loop issue from earlier,
while also still allowing for that Trench Warfare trick to be possible
(I tested it with the libTAS movie I mentioned in #606; it syncs fine).
There are no other known regressions resulting from this fix
(hopefully).
This reverts commit 942217f871.
This fix (of a regression of a fix) has a regression where immediately
flipping off of horizontally-moving platforms or conveyors will no
longer provide you with a "boost" given certain vertical pixel
alignments.
The regression that this fix fixed will be fixed another way.
Fixes#606.
This works on macOS, Wayland, and a few more esoteric platforms. X11
doesn't have a concept of DPI-awareness. Note that with this flag
SDL_GetWindowSize() isn't guaranteed to return the actual window size.
Retextured checkpoints have always been in the game, but clicking on
them in the editor would lead to them losing their retextured-ness. So,
checkpoints should be left alone if their p1 isn't either 0 or 1. Also,
they don't show up properly in the editor, so that's fixed, too.
Retextured and flipped terminals were added in 2.3, and show up properly
in-game, but don't properly show up in the editor, either. So now they
show up in the editor. Additionally, clicking on them will flip the
terminal as well, but only if its p1 is 0 or 1, just like checkpoints
now do.
This call to Makebfont() always existed, but ever since 2.3's per-level
custom assets were added, graphics.reloadresources() also calls
graphics.Makebfont(), meaning this call is unnecessary. Calling it twice
results in graphics.bfont and graphics.flipbfont having twice the number
of elements, until custom assets get mounted (or unmounted, technically).
This does the same thing as the last commit, but for No Death Mode
instead of Time Trials. Whenever you die in No Death Mode, or complete
it, all the relevant variables get copied to variables prefixed with
'ndmresult' that never get reset by script.hardreset(), and these
variables are what titlerender() use, instead of the "live" ones.
This makes it so when a Time Trial gets completed, all the relevant
variables get copied onto variables prefixed with 'timetrialresult',
which never get reset by script.hardreset(). Then titlerender() will use
those variables accordingly.
There are multiple different exit paths to the main menu. In 2.2, they
all had a bunch of copy-pasted code. In 2.3 currently, most of them use
game.quittomenu(), but there are some stragglers that still use
hand-copied code.
This is a bit of a problem, because all exit paths should consistently
have FILESYSTEM_unmountassets(), as part of the 2.3 feature of per-level
custom assets. Furthermore, most (but not all) of the paths call
script.hardreset() too, and some of the stragglers don't. So there could
be something persisting through to the title screen (like a really long
flash/shake timer) that could only persist if exiting to the title
screen through those paths.
But, actually, it seems like there's a good reason for some of those to
not call script.hardreset() - namely, dying or completing No Death Mode
and completing a Time Trial presents some information onscreen that
would get reset by script.hardreset(), so I'll fix that in a later
commit.
So what I've done for this commit is found every exit path that didn't
already use game.quittomenu(), and made them use game.quittomenu(). As
well, some of them had special handling that existed on top of them
already having a corresponding entry in game.quittomenu() (but the path
would take the special handling because it never did game.quittomenu()),
so I removed that special handling as well (e.g. exiting from a custom
level used returntomenu(Menu::levellist) when quittomenu() already had
that same returntomenu()).
The menu that exiting from the level editor returns to is now handled in
game.quittomenu() as well, where the map.custommode branch now also
checks for map.custommodeforreal. Unfortunately, it seems like entering
the level editor doesn't properly initialize map.custommode, so entering
the level editor now initializes map.custommode, too.
I've also taken the music.play(6) out of game.quittomenu(), because not
all exit paths immediately play Presenting VVVVVV, so all exit paths
that DO immediately play Presenting VVVVVV now have music.play(6)
special-cased for them, which is fine enough for me.
Here is the list of all exit paths to the menu:
- Exiting through the pause menu (without glitchrunner mode)
- Exiting through the pause menu (with glitchrunner mode)
- Completing a custom level
- Completing a Time Trial
- Dying in No Death Mode
- Completing No Death Mode
- Completing an Intermission replay
- Exiting from the level editor
- Completing the main game
Comments in general don't get verified by the compiler, but
commented-out code is even worse. Especially since this looks to be
outdated code.
As always, if we need some of this code, then we can just look back in
the Git history.
This fixes a segfault, because we would then pass compressed image data
to SDL_ConvertSurfaceFormat() in LoadImage(). I didn't test my previous
PR. Whoops.
Implicit conversion warnings happen all over the codebase, but there's
no reason to warn on all of them, and adding casts everywhere is
annoying to read and patently unnecessary.
MSVC is the only compiler that has this warning (GCC even on -Wall
-Wextra doesn't warn about implicit conversions), so disable it for
MSVC.
While compiling in release mode, GCC warns about these two potentially
being used uninitialized further down. The only way this could happen is
if the case-switches below didn't match up with a case, which would
require the game to be in an invalid state (and have invalid values for
rcol and spcol), but it's better to be safe than sorry.
The only thing we need LodePNG for is to decode a PNG that we've already
loaded into memory. We handle the filesystem part ourselves, so we don't
need LodePNG's filesystem functions; we don't encode images, and we
don't use the zlib functions. So disable all of those.
During 2.3 development, there's been a gradual shift to using SDL stdlib
functions instead of libc functions, but there are still some libc
functions (or the same libc function but from the STL) in the code.
Well, this patch replaces all the rest of them in one fell swoop.
SDL's stdlib can replace most of these, but its SDL_min() and SDL_max()
are inadequate - they aren't really functions, they're more like macros
with a nasty penchant for double-evaluation. So I just made my own
VVV_min() and VVV_max() functions and placed them in Maths.h instead,
then replaced all the previous usages of min(), max(), std::min(),
std::max(), SDL_min(), and SDL_max() with VVV_min() and VVV_max().
Additionally, there's no SDL_isxdigit(), so I just implemented my own
VVV_isxdigit().
SDL has SDL_malloc() and SDL_free(), but they have some refcounting
built in to them, so in order to use them with LodePNG, I have to
replace the malloc() and free() that LodePNG uses. Which isn't too hard,
I did it in a new file called ThirdPartyDeps.c, and LodePNG is now
compiled with the LODEPNG_NO_COMPILE_ALLOCATORS definition.
Lastly, I also refactored the awful strcpy() and strcat() usages in
PLATFORM_migrateSaveData() to use SDL_snprintf() instead. I know save
migration is getting axed in 2.4, but it still bothers me to have
something like that in the codebase otherwise.
Without further ado, here is the full list of functions that the
codebase now uses:
- SDL_strlcpy() instead of strcpy()
- SDL_strlcat() instead of strcat()
- SDL_snprintf() instead of sprintf(), strcpy(), or strcat() (see above)
- VVV_min() instead of min(), std::min(), or SDL_min()
- VVV_max() instead of max(), std::max(), or SDL_max()
- VVV_isxdigit() instead of isxdigit()
- SDL_strcmp() instead of strcmp()
- SDL_strcasecmp() instead of strcasecmp() or Win32 strcmpi()
- SDL_strstr() instead of strstr()
- SDL_strlen() instead of strlen()
- SDL_sscanf() instead of sscanf()
- SDL_getenv() instead of getenv()
- SDL_malloc() instead of malloc() (replacing in LodePNG as well)
- SDL_free() instead of free() (replacing in LodePNG as well)
This patch de-duplicates the tool drawing code a bit in the menu that
gets brought up when you press Space in the level editor, as well as
fixes several bugs related to the fact that the original author(s) of
the code decided to copy-paste everything. (It was most likely Terry,
judging by the distinct lack of whitespace between tokens in the code.)
There are two "pages" of tools that get shown when you open the tool
menu, according to your currently-selected tool.
1. On the first page, your currently-selected tool gets a brighter
outline. However, on the second page, the code to draw the outline over
your currently-selected tool is missing. So I've fixed that.
2. On the first page, the glyph indicator next to the tool icon also
gets brighter when you have that tool selected. However, on the
second page, the code that drew the brighter-colored indicator got
ran before the code that drew the normal-colored indicator, so this
was never shown. This is also fixed.
3. The glyph indicator of the gravity line tool didn't get brighter when
you had it selected, due to its special-cased copy-pasted code
drawing its brighter color before drawing its normal color. This has
also been fixed.
4. Lastly, the tool menu no longer draws the brighter-colored glyphs on
top of the normal-colored glyphs. Instead, the menu will simply draw
the brighter-colored glyphs and will not draw the normal-colored
glyphs in the first place. This is because double-drawing text like
this will look bad if the user has a custom font.png that has
translucent pixels, like I do.
All of these bugs have been fixed by paying off the technical debt of
copy-pasting code.
This variable seems to have been intended to make sure
game.savestatsandsettings() was called at the end of the frame, or make
sure that it didn't get called more than once per frame. I don't see any
frame ordering-related reason why it needs to be called specifically at
the end of the frame (the function doesn't modify any state), so it's
more plausible that it was added to make sure it didn't get called more
than one per frame.
However, upon further analysis, none of the code paths where
game.savemystats is used ever calls or sets game.savemystats more than
once, and a majority of the code directly calls
game.savestatsandsettings() anyway, so there's no reason for this
variable to exist. If we ever need to make sure it doesn't get called
more than once, and there's no way to change the code paths around to
prevent it otherwise, we can use the defer callbacks system that I added
to #535, when it gets merged.
These variables basically serve no purpose. map.customx and map.customy
are clearly never used. map.finalx and map.finaly, on the other hand,
are basically always game.roomx and game.roomy respectively if
map.finalmode is on, and if it's off, then they don't matter.
Also, there are some weird and redundant variable assignments going on
with these; most notably in map.gotoroom(), where rx/ry (local
variables) get assigned to finalx/finaly, then finalx/finaly get
assigned to game.roomx/game.roomy, then finalx/finaly get assigned to
rx/ry. If finalx/finaly made a difference, then there'd be no need to
assign finalx/finaly back to rx/ry. So it makes the code clearer to
remove these weird bits of code.
2.3's per-level assets feature also added a hotkey to reload the custom
assets of the level you're currently editing in the editor, so you
wouldn't have to re-load the level yourself. This hotkey is F9, but
however, it hasn't been documented in the hotkey list brought up by
pressing Shift, until now.
This patch cleans up unnecessary exports from header files (there were
only a few), as well as adds the static keyword to all symbols that
aren't exported and are specific to a file. This helps the linker out in
not doing any unnecessary work, speeding it up and avoiding silent
symbol conflicts (otherwise two symbols with the same name (and
type/signature in C++) would quietly resolve as okay by the linker).
Line clipping and second-frame edge-flipping have been broken since #539
was merged (d910c5118d). The cause of this
is moving the onground/onroof code around.
A proper loop order fix is going to come once #535 gets finalized and
merged, so this is a stopgap measure just to make sure people don't
report that line clipping or second-frame edge-flipping are broken in
current builds of 2.3.
There is a certain ordering of which corners you click on to place enemy
and platform boundaries, and script boxes. You must first click on the
top-left corner, then click on the bottom-right corner. The visual box
that is drawn after you've first clicked on the top-left corner clearly
shows this intended way of doing things.
However, it seems like despite the visuals, the game didn't properly
prevent you from clicking on the corners in the wrong way. If you placed
it from top-right to bottom-left, or bottom-left to top-right, then the
game would place the boxes accordingly, and they would have a weird
shape where two of its opposite sides would just be missing. But,
placing them from bottom-right to top-left is prevented accordingly.
The bug comes down to a simple use of "or", instead of the correct
"and". This isn't the first time the wrong conjunction was used in a
conditional... (8260bb2696, #136)
Since the code block that the if-statement guards is the code that will
execute if the corners placed were correct, the if-statement thus should
be written in the positive case and use a more restrictive "and",
instead of the negative case, which would use a more looser "or". There
are less cases that are correct than cases which are incorrect - in this
case, there is only 1 correct way of doing things (top-left to
bottom-right), compared to 3 incorrect ways of doing things (top-right
to bottom-left, bottom-left to top-right, bottom-right to top-left) - so
when thinking of positive cases, you should be using "and".
Or, you can always just test it. This bug has been in the game since
2.0, so it seems like no one just tested that incorrect input actually
didn't work.
Ever since 2.0, the colors of some of the Time Trial trophies in the
Secret Lab don't correspond to the crewmate of the given level. The
trophy for the Tower uses Victoria's color, and the Lab trophy uses
Vermilion's color. The Space Station 2 trophy uses Viridian's color, and
the Final Level trophy uses Vitellary's color.
This doesn't appear to be intentional, and it would be odd if it was,
since this game matches the colors everywhere else (each zone on the map
is colored with their respective crewmate in mind, for instance). Also,
the Lab trophy has the sad expression, which is Victoria's trait - it
would be weird if this was intended for Vermilion instead.
But the biggest piece of evidence that this was unintentional is the
corresponding comment for each color in Graphics::setcol(). It mislabels
yellow as cyan, cyan as yellow, blue as red, and red as blue.
To fix this, I simply have to set the correct color for each trophy in
case 25 of entityclass::createentity(). I could fix it in
Graphics::setcol() itself, but custom levels might depend on those
certain colors being the way they are, so it's a safer bet to just fix
it in the trophy creation case itself.
The diff of this might look weird. Even though all I'm doing is changing
some value assignments around, it looks like the "patience" algorithm
thinks I'm moving a whole case of the trophy switch-case around.
So... it looks like being able to switch through tilesets backwards has
been in 2.3 for a while, guess no one just uses 2.3 or the level editor
that much. It seems like it's always been broken, too.
If you were on the Space Station tileset (tileset 0), pressing Shift+F1
would keep you on the Space Station tileset instead of switching to the
Ship (tileset 4).
It looks like the problem here was mixing size_t and int together - so
the modulus operation promoted the left-hand side to size_t, which is
unsigned, so the -1 turned into SIZE_MAX, which is 18446744073709551615
on my system. You'll note that that ends in a 5, so the number is
divisible by 5, meaning taking it modulo 5 leads to 0. So the tileset
would be kept at 0.
At least unsigned integer underflow/overflow is properly defined, so
there's no UB here. Just careless type mixing going on.
The solution is to make the modulus an int instead of a size_t. This
introduces an implicit conversion, but I don't care because my compiler
doesn't warn about it, and implicit conversion warnings ought to be
disabled on MSVC anyway.
This fixes a bug where if you entered a tower before watching the
credits sequence, the credits sequence would have mismatched text and
background colors.
This bug happened because entering a tower modified the r/g/b attributes
of mapclass, and updated graphics.towerbg, without updating
graphics.titlebg too. Then gamecompleterender() uses the r/g/b
attributes of mapclass.
The solution is to put the r/g/b attributes on TowerBG instead. That
way, entering a tower will only modify the r/g/b attributes used to
render towers, and won't affect the r/g/b attributes used to render the
credits sequence.
Additionally, I also de-duplicated the case-switch that updated the
r/g/b attributes based off of the current colstate, because it got
copy-pasted twice, leading to three instances of one piece of code.
