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c8537beac1
VVVVVV/desktop_version/src/main.cpp
Misa c8537beac1 Add deferred callbacks to game loop 
Sometimes, there needs to be code that gets ran at the end of the game
loop, otherwise rendering issues might occur. Currently, we do this by
special-casing each deferred routine (e.g. shouldreturntoeditor), but it
would be better if we could generalize this deference instead.

Deferred callbacks can be added using the DEFER_CALLBACK macro. It takes
in one argument, which is the name of a function, and that function must
be a void function that takes in no arguments. Also, due to annoying C++
quirks, void functions taking no arguments cannot be attributes of
objects (because they have an implicit `this` parameter), so it's
recommended to create each callback separately before using the
DEFER_CALLBACK macro.
2021-03-21 02:55:42 -04:00

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#include <SDL.h>
#include <stdio.h>
#include "DeferCallbacks.h"
#include "editor.h"
#include "Enums.h"
#include "Entity.h"
#include "Exit.h"
#include "FileSystemUtils.h"
#include "Game.h"
#include "Graphics.h"
#include "Input.h"
#include "KeyPoll.h"
#include "Logic.h"
#include "Map.h"
#include "Music.h"
#include "Network.h"
#include "preloader.h"
#include "Render.h"
#include "RenderFixed.h"
#include "Screen.h"
#include "Script.h"
#include "SoundSystem.h"
#include "UtilityClass.h"
scriptclass script;
#if !defined(NO_CUSTOM_LEVELS)
std::vector<edentities> edentity;
editorclass ed;
#endif
UtilityClass help;
Graphics graphics;
musicclass music;
Game game;
KeyPoll key;
mapclass map;
entityclass obj;
Screen gameScreen;
static bool startinplaytest = false;
static bool savefileplaytest = false;
static int savex = 0;
static int savey = 0;
static int saverx = 0;
static int savery = 0;
static int savegc = 0;
static int savemusic = 0;
static std::string playassets;
static std::string playtestname;
static volatile Uint32 time_ = 0;
static volatile Uint32 timePrev = 0;
static volatile Uint32 accumulator = 0;
static volatile Uint32 f_time = 0;
static volatile Uint32 f_timePrev = 0;
static inline Uint32 get_framerate(const int slowdown)
{
switch (slowdown)
{
case 30:
return 34;
case 24:
return 41;
case 18:
return 55;
case 12:
return 83;
}
return 34;
}
enum FuncType
{
Func_null,
Func_fixed,
Func_delta
};
struct ImplFunc
{
enum FuncType type;
void (*func)(void);
};
static void runscript(void)
{
script.run();
}
static void teleportermodeinput(void)
{
if (game.useteleporter)
{
teleporterinput();
}
else
{
script.run();
gameinput();
}
}
/* Only gets used in EDITORMODE. I assume the compiler will optimize this away
* if this is a NO_CUSTOM_LEVELS or NO_EDITOR build
*/
static void flipmodeoff(void)
{
graphics.flipmode = false;
}
static void focused_begin(void);
static void focused_end(void);
static const inline struct ImplFunc* get_gamestate_funcs(
const int gamestate,
int* num_implfuncs
) {
switch (gamestate)
{
#define FUNC_LIST_BEGIN(GAMESTATE) \
case GAMESTATE: \
{ \
static const struct ImplFunc implfuncs[] = { \
{Func_fixed, focused_begin},
#define FUNC_LIST_END \
{Func_fixed, focused_end} \
}; \
*num_implfuncs = SDL_arraysize(implfuncs); \
return implfuncs; \
}
FUNC_LIST_BEGIN(GAMEMODE)
{Func_fixed, runscript},
{Func_fixed, gameinput},
{Func_fixed, gamerenderfixed},
{Func_delta, gamerender},
{Func_fixed, gamelogic},
FUNC_LIST_END
FUNC_LIST_BEGIN(TITLEMODE)
{Func_fixed, titleinput},
{Func_fixed, titlerenderfixed},
{Func_delta, titlerender},
{Func_fixed, titlelogic},
FUNC_LIST_END
FUNC_LIST_BEGIN(MAPMODE)
{Func_fixed, maprenderfixed},
{Func_delta, maprender},
{Func_fixed, mapinput},
{Func_fixed, maplogic},
FUNC_LIST_END
FUNC_LIST_BEGIN(TELEPORTERMODE)
{Func_fixed, maprenderfixed},
{Func_delta, teleporterrender},
{Func_fixed, teleportermodeinput},
{Func_fixed, maplogic},
FUNC_LIST_END
FUNC_LIST_BEGIN(GAMECOMPLETE)
{Func_fixed, gamecompleterenderfixed},
{Func_delta, gamecompleterender},
{Func_fixed, gamecompleteinput},
{Func_fixed, gamecompletelogic},
FUNC_LIST_END
FUNC_LIST_BEGIN(GAMECOMPLETE2)
{Func_delta, gamecompleterender2},
{Func_fixed, gamecompleteinput2},
{Func_fixed, gamecompletelogic2},
FUNC_LIST_END
#if !defined(NO_CUSTOM_LEVELS) && !defined(NO_EDITOR)
FUNC_LIST_BEGIN(EDITORMODE)
{Func_fixed, flipmodeoff},
{Func_fixed, editorinput},
{Func_fixed, editorrenderfixed},
{Func_delta, editorrender},
{Func_fixed, editorlogic},
FUNC_LIST_END
#endif
FUNC_LIST_BEGIN(PRELOADER)
{Func_fixed, preloaderinput},
{Func_fixed, preloaderrenderfixed},
{Func_delta, preloaderrender},
FUNC_LIST_END
#undef FUNC_LIST_END
#undef FUNC_LIST_BEGIN
}
SDL_assert(0 && "Invalid gamestate!");
return NULL;
}
enum IndexCode
{
Index_none,
Index_end
};
static const struct ImplFunc* gamestate_funcs = NULL;
static int num_gamestate_funcs = 0;
static int gamestate_func_index = -1;
static enum IndexCode increment_gamestate_func_index(void)
{
gamestate_func_index++;
if (gamestate_func_index == num_gamestate_funcs)
{
/* Reached the end of current gamestate order.
* Re-fetch for new order if gamestate changed.
*/
gamestate_funcs = get_gamestate_funcs(
game.gamestate,
&num_gamestate_funcs
);
/* Also run callbacks that were deferred to end of func sequence. */
DEFER_execute_callbacks();
gamestate_func_index = 0;
return Index_end;
}
return Index_none;
}
static void unfocused_run(void);
static const struct ImplFunc unfocused_func_list[] = {
Func_fixed,
unfocused_run
};
static const struct ImplFunc* unfocused_funcs = unfocused_func_list;
static int num_unfocused_funcs = SDL_arraysize(unfocused_func_list);
static int unfocused_func_index = -1;
static enum IndexCode increment_unfocused_func_index(void)
{
unfocused_func_index++;
if (unfocused_func_index == num_unfocused_funcs)
{
unfocused_func_index = 0;
return Index_end;
}
return Index_none;
}
static const struct ImplFunc** active_funcs = NULL;
static int* num_active_funcs = NULL;
static int* active_func_index = NULL;
static enum IndexCode (*increment_func_index)(void) = NULL;
enum LoopCode
{
Loop_continue,
Loop_stop
};
static enum LoopCode loop_assign_active_funcs(void)
{
if (key.isActive)
{
active_funcs = &gamestate_funcs;
num_active_funcs = &num_gamestate_funcs;
active_func_index = &gamestate_func_index;
increment_func_index = &increment_gamestate_func_index;
}
else
{
active_funcs = &unfocused_funcs;
num_active_funcs = &num_unfocused_funcs;
active_func_index = &unfocused_func_index;
increment_func_index = &increment_unfocused_func_index;
}
return Loop_continue;
}
static enum LoopCode loop_run_active_funcs(void)
{
while ((*active_funcs)[*active_func_index].type != Func_delta)
{
const struct ImplFunc* implfunc = &(*active_funcs)[*active_func_index];
enum IndexCode index_code;
if (implfunc->type != Func_null && implfunc->func != NULL)
{
implfunc->func();
}
index_code = increment_func_index();
if (index_code == Index_end)
{
return Loop_continue;
}
}
return Loop_stop;
}
static enum LoopCode loop_begin(void);
static enum LoopCode loop_end(void);
static enum LoopCode (*const meta_funcs[])(void) = {
loop_begin,
loop_assign_active_funcs,
loop_run_active_funcs,
loop_end
};
static int meta_func_index = 0;
static void inline fixedloop(void)
{
while (true)
{
enum LoopCode loop_code = meta_funcs[meta_func_index]();
if (loop_code == Loop_stop)
{
break;
}
meta_func_index = (meta_func_index + 1) % SDL_arraysize(meta_funcs);
}
}
static void inline deltaloop(void);
static void cleanup(void);
int main(int argc, char *argv[])
{
char* baseDir = NULL;
char* assetsPath = NULL;
for (int i = 1; i < argc; ++i)
{
#define ARG(name) (SDL_strcmp(argv[i], name) == 0)
#define ARG_INNER(code) \
if (i + 1 < argc) \
{ \
code \
} \
else \
{ \
printf("%s option requires one argument.\n", argv[i]); \
VVV_exit(1); \
}
if (ARG("-renderer"))
{
ARG_INNER({
i++;
SDL_SetHintWithPriority(SDL_HINT_RENDER_DRIVER, argv[i], SDL_HINT_OVERRIDE);
})
}
else if (ARG("-basedir"))
{
ARG_INNER({
i++;
baseDir = argv[i];
})
}
else if (ARG("-assets"))
{
ARG_INNER({
i++;
assetsPath = argv[i];
})
}
else if (ARG("-playing") || ARG("-p"))
{
ARG_INNER({
i++;
startinplaytest = true;
playtestname = std::string("levels/");
playtestname.append(argv[i]);
playtestname.append(std::string(".vvvvvv"));
})
}
else if (ARG("-playx") || ARG("-playy") ||
ARG("-playrx") || ARG("-playry") ||
ARG("-playgc") || ARG("-playmusic"))
{
ARG_INNER({
savefileplaytest = true;
int v = help.Int(argv[i+1]);
if (ARG("-playx")) savex = v;
else if (ARG("-playy")) savey = v;
else if (ARG("-playrx")) saverx = v;
else if (ARG("-playry")) savery = v;
else if (ARG("-playgc")) savegc = v;
else if (ARG("-playmusic")) savemusic = v;
i++;
})
}
else if (ARG("-playassets"))
{
ARG_INNER({
i++;
// Even if this is a directory, FILESYSTEM_mountassets() expects '.vvvvvv' on the end
playassets = "levels/" + std::string(argv[i]) + ".vvvvvv";
})
}
#undef ARG_INNER
#undef ARG
else
{
printf("Error: invalid option: %s\n", argv[i]);
VVV_exit(1);
}
}
if(!FILESYSTEM_init(argv[0], baseDir, assetsPath))
{
puts("Unable to initialize filesystem!");
VVV_exit(1);
}
SDL_Init(
SDL_INIT_VIDEO |
SDL_INIT_AUDIO |
SDL_INIT_JOYSTICK |
SDL_INIT_GAMECONTROLLER
);
if (SDL_IsTextInputActive() == SDL_TRUE)
{
SDL_StopTextInput();
}
NETWORK_init();
printf("\t\t\n");
printf("\t\t\n");
printf("\t\t VVVVVV\n");
printf("\t\t\n");
printf("\t\t\n");
printf("\t\t 8888888888888888 \n");
printf("\t\t88888888888888888888\n");
printf("\t\t888888 8888 88\n");
printf("\t\t888888 8888 88\n");
printf("\t\t88888888888888888888\n");
printf("\t\t88888888888888888888\n");
printf("\t\t888888 88\n");
printf("\t\t88888888 8888\n");
printf("\t\t 8888888888888888 \n");
printf("\t\t 88888888 \n");
printf("\t\t 8888888888888888 \n");
printf("\t\t88888888888888888888\n");
printf("\t\t88888888888888888888\n");
printf("\t\t88888888888888888888\n");
printf("\t\t8888 88888888 8888\n");
printf("\t\t8888 88888888 8888\n");
printf("\t\t 888888888888 \n");
printf("\t\t 8888 8888 \n");
printf("\t\t 888888 888888 \n");
printf("\t\t 888888 888888 \n");
printf("\t\t 888888 888888 \n");
printf("\t\t\n");
printf("\t\t\n");
//Set up screen
// Load Ini
graphics.init();
game.init();
// This loads music too...
graphics.reloadresources();
game.gamestate = PRELOADER;
game.menustart = false;
game.mainmenu = 0;
// Initialize title screen to cyan
graphics.titlebg.colstate = 10;
map.nexttowercolour();
map.ypos = (700-29) * 8;
graphics.towerbg.bypos = map.ypos / 2;
graphics.titlebg.bypos = map.ypos / 2;
{
// Prioritize unlock.vvv first (2.2 and below),
// but settings have been migrated to settings.vvv (2.3 and up)
ScreenSettings screen_settings;
game.loadstats(&screen_settings);
game.loadsettings(&screen_settings);
gameScreen.init(screen_settings);
}
graphics.screenbuffer = &gameScreen;
graphics.create_buffers(gameScreen.GetFormat());
if (game.skipfakeload)
game.gamestate = TITLEMODE;
if (game.slowdown == 0) game.slowdown = 30;
//Check to see if you've already unlocked some achievements here from before the update
if (game.swnbestrank > 0){
if(game.swnbestrank >= 1) game.unlockAchievement("vvvvvvsupgrav5");
if(game.swnbestrank >= 2) game.unlockAchievement("vvvvvvsupgrav10");
if(game.swnbestrank >= 3) game.unlockAchievement("vvvvvvsupgrav15");
if(game.swnbestrank >= 4) game.unlockAchievement("vvvvvvsupgrav20");
if(game.swnbestrank >= 5) game.unlockAchievement("vvvvvvsupgrav30");
if(game.swnbestrank >= 6) game.unlockAchievement("vvvvvvsupgrav60");
}
if(game.unlock[5]) game.unlockAchievement("vvvvvvgamecomplete");
if(game.unlock[19]) game.unlockAchievement("vvvvvvgamecompleteflip");
if(game.unlock[20]) game.unlockAchievement("vvvvvvmaster");
if (game.bestgamedeaths > -1) {
if (game.bestgamedeaths <= 500) {
game.unlockAchievement("vvvvvvcomplete500");
}
if (game.bestgamedeaths <= 250) {
game.unlockAchievement("vvvvvvcomplete250");
}
if (game.bestgamedeaths <= 100) {
game.unlockAchievement("vvvvvvcomplete100");
}
if (game.bestgamedeaths <= 50) {
game.unlockAchievement("vvvvvvcomplete50");
}
}
if(game.bestrank[0]>=3) game.unlockAchievement("vvvvvvtimetrial_station1_fixed");
if(game.bestrank[1]>=3) game.unlockAchievement("vvvvvvtimetrial_lab_fixed");
if(game.bestrank[2]>=3) game.unlockAchievement("vvvvvvtimetrial_tower_fixed");
if(game.bestrank[3]>=3) game.unlockAchievement("vvvvvvtimetrial_station2_fixed");
if(game.bestrank[4]>=3) game.unlockAchievement("vvvvvvtimetrial_warp_fixed");
if(game.bestrank[5]>=3) game.unlockAchievement("vvvvvvtimetrial_final_fixed");
obj.init();
#if !defined(NO_CUSTOM_LEVELS)
if (startinplaytest) {
game.levelpage = 0;
game.playcustomlevel = 0;
game.playassets = playassets;
game.menustart = true;
LevelMetaData meta;
if (ed.getLevelMetaData(playtestname, meta)) {
ed.ListOfMetaData.clear();
ed.ListOfMetaData.push_back(meta);
} else {
ed.loadZips();
if (ed.getLevelMetaData(playtestname, meta)) {
ed.ListOfMetaData.clear();
ed.ListOfMetaData.push_back(meta);
} else {
printf("Level not found\n");
VVV_exit(1);
}
}
game.loadcustomlevelstats();
game.customleveltitle=ed.ListOfMetaData[game.playcustomlevel].title;
game.customlevelfilename=ed.ListOfMetaData[game.playcustomlevel].filename;
if (savefileplaytest) {
game.playx = savex;
game.playy = savey;
game.playrx = saverx;
game.playry = savery;
game.playgc = savegc;
game.playmusic = savemusic;
game.cliplaytest = true;
script.startgamemode(23);
} else {
script.startgamemode(22);
}
graphics.fademode = 0;
}
#endif
key.isActive = true;
game.gametimer = 0;
gamestate_funcs = get_gamestate_funcs(game.gamestate, &num_gamestate_funcs);
loop_assign_active_funcs();
while(!key.quitProgram)
{
f_time = SDL_GetTicks();
const Uint32 f_timetaken = f_time - f_timePrev;
if (!game.over30mode && f_timetaken < 34)
{
const volatile Uint32 f_delay = 34 - f_timetaken;
SDL_Delay(f_delay);
f_time = SDL_GetTicks();
}
f_timePrev = f_time;
timePrev = time_;
time_ = SDL_GetTicks();
deltaloop();
}
cleanup();
return 0;
}
static void cleanup(void)
{
/* Order matters! */
game.savestatsandsettings();
gameScreen.destroy();
graphics.grphx.destroy();
graphics.destroy_buffers();
graphics.destroy();
music.destroy();
NETWORK_shutdown();
SDL_Quit();
FILESYSTEM_deinit();
}
void VVV_exit(const int exit_code)
{
cleanup();
exit(exit_code);
}
static void inline deltaloop(void)
{
//timestep limit to 30
const float rawdeltatime = static_cast<float>(time_ - timePrev);
accumulator += rawdeltatime;
Uint32 timesteplimit;
if (game.gamestate == EDITORMODE)
{
timesteplimit = 24;
}
else if (game.gamestate == GAMEMODE)
{
timesteplimit = get_framerate(game.slowdown);
}
else
{
timesteplimit = 34;
}
while (accumulator >= timesteplimit)
{
increment_func_index();
accumulator = SDL_fmodf(accumulator, timesteplimit);
fixedloop();
}
const float alpha = game.over30mode ? static_cast<float>(accumulator) / timesteplimit : 1.0f;
graphics.alpha = alpha;
if (active_func_index == NULL
|| *active_func_index == -1
|| active_funcs == NULL)
{
/* Somehow the first deltatime has been too small and things haven't
* initialized. We'll just no-op for now.
*/
}
else
{
const struct ImplFunc* implfunc = &(*active_funcs)[*active_func_index];
if (implfunc->type == Func_delta && implfunc->func != NULL)
{
implfunc->func();
gameScreen.FlipScreen();
}
}
}
static enum LoopCode loop_begin(void)
{
// Update network per frame.
NETWORK_update();
key.Poll();
return Loop_continue;
}
static void unfocused_run(void)
{
Mix_Pause(-1);
Mix_PauseMusic();
if (!game.blackout)
{
ClearSurface(graphics.backBuffer);
graphics.bprint(5, 110, "Game paused", 196 - help.glow, 255 - help.glow, 196 - help.glow, true);
graphics.bprint(5, 120, "[click to resume]", 196 - help.glow, 255 - help.glow, 196 - help.glow, true);
graphics.bprint(5, 220, "Press M to mute in game", 164 - help.glow, 196 - help.glow, 164 - help.glow, true);
graphics.bprint(5, 230, "Press N to mute music only", 164 - help.glow, 196 - help.glow, 164 - help.glow, true);
}
graphics.render();
gameScreen.FlipScreen();
//We are minimised, so lets put a bit of a delay to save CPU
SDL_Delay(100);
}
static void focused_begin(void)
{
Mix_Resume(-1);
Mix_ResumeMusic();
game.gametimer++;
}
static void focused_end(void)
{
//Screen effects timers
if (game.flashlight > 0)
{
game.flashlight--;
}
if (game.screenshake > 0)
{
game.screenshake--;
graphics.updatescreenshake();
}
}
static enum LoopCode loop_end(void)
{
if (graphics.screenbuffer->badSignalEffect)
{
UpdateFilter();
}
//We did editorinput, now it's safe to turn this off
key.linealreadyemptykludge = false;
//Mute button
if (key.isDown(KEYBOARD_m) && game.mutebutton<=0 && !key.textentry())
{
game.mutebutton = 8;
if (game.muted)
{
game.muted = false;
}
else
{
game.muted = true;
}
}
if(game.mutebutton>0)
{
game.mutebutton--;
}
if (key.isDown(KEYBOARD_n) && game.musicmutebutton <= 0 && !key.textentry())
{
game.musicmutebutton = 8;
game.musicmuted = !game.musicmuted;
}
if (game.musicmutebutton > 0)
{
game.musicmutebutton--;
}
if (game.muted)
{
Mix_VolumeMusic(0) ;
Mix_Volume(-1,0);
}
else
{
Mix_Volume(-1,MIX_MAX_VOLUME);
if (game.musicmuted)
{
Mix_VolumeMusic(0);
}
else
{
Mix_VolumeMusic(music.musicVolume);
}
}
if (key.resetWindow)
{
key.resetWindow = false;
gameScreen.ResizeScreen(-1, -1);
}
music.processmusic();
graphics.processfade();
game.gameclock();
return Loop_continue;
}
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