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sdl12main.c
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#include <SDL.h>
#include <SDL_mixer.h>
#if SDL_MAJOR_VERSION >= 2
#include "sdl20compat.inc.c"
#endif
#include <math.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <time.h>
#ifdef _3DS
#include <3ds.h>
#endif
#include "celeste.h"
static void ErrLog(char* fmt, ...) {
#ifdef _3DS
/*FILE* f = fopen("sdmc:/ccleste.txt", "a");
if (!f) return;
fprintf(f, "%li \t", (long int)time(NULL));*/
FILE* f = stdout; //bottom screen console
#else
FILE* f = stderr;
#endif
va_list ap;
va_start(ap, fmt);
vfprintf(f, fmt, ap);
va_end(ap);
if (f != stderr && f != stdout) fclose(f);
}
SDL_Surface* screen = NULL;
SDL_Surface* gfx = NULL;
SDL_Surface* font = NULL;
Mix_Chunk* snd[64] = {NULL};
Mix_Music* mus[6] = {NULL};
#define PICO8_W 128
#define PICO8_H 128
#ifdef _3DS
static const int scale = 2;
#else
static int scale = 4;
#endif
static const SDL_Color base_palette[16] = {
{0x00, 0x00, 0x00},
{0x1d, 0x2b, 0x53},
{0x7e, 0x25, 0x53},
{0x00, 0x87, 0x51},
{0xab, 0x52, 0x36},
{0x5f, 0x57, 0x4f},
{0xc2, 0xc3, 0xc7},
{0xff, 0xf1, 0xe8},
{0xff, 0x00, 0x4d},
{0xff, 0xa3, 0x00},
{0xff, 0xec, 0x27},
{0x00, 0xe4, 0x36},
{0x29, 0xad, 0xff},
{0x83, 0x76, 0x9c},
{0xff, 0x77, 0xa8},
{0xff, 0xcc, 0xaa}
};
static SDL_Color palette[16];
static inline Uint32 getcolor(char idx) {
SDL_Color c = palette[idx%16];
return SDL_MapRGB(screen->format, c.r,c.g,c.b);
}
static void ResetPalette(void) {
//SDL_SetPalette(surf, SDL_PHYSPAL|SDL_LOGPAL, (SDL_Color*)base_palette, 0, 16);
//memcpy(screen->format->palette->colors, base_palette, 16*sizeof(SDL_Color));
memcpy(palette, base_palette, sizeof palette);
}
static char* GetDataPath(char* path, int n, const char* fname) {
#ifdef _3DS
snprintf(path, n, "romfs:/%s", fname);
#else
#ifdef _WIN32
char pathsep = '\\';
#else
char pathsep = '/';
#endif //_WIN32
snprintf(path, n, "data%c%s", pathsep, fname);
#endif //_3DS
return path;
}
static Uint32 getpixel(SDL_Surface *surface, int x, int y) {
int bpp = surface->format->BytesPerPixel;
/* Here p is the address to the pixel we want to retrieve */
Uint8 *p = (Uint8 *)surface->pixels + y * surface->pitch + x * bpp;
switch(bpp) {
case 1:
return *p;
case 2:
return *(Uint16 *)p;
case 3:
if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
return p[0] << 16 | p[1] << 8 | p[2];
else
return p[0] | p[1] << 8 | p[2] << 16;
case 4:
return *(Uint32 *)p;
}
return 0;
}
static void loadbmpscale(char* filename, SDL_Surface** s) {
SDL_Surface* surf = *s;
if (surf) SDL_FreeSurface(surf), surf = *s = NULL;
char tmpath[4096];
SDL_Surface* bmp = SDL_LoadBMP(GetDataPath(tmpath, sizeof tmpath, filename));
if (!bmp) {
ErrLog("error loading bmp '%s': %s\n", filename, SDL_GetError());
return;
}
int w = bmp->w, h = bmp->h;
surf = SDL_CreateRGBSurface(SDL_SWSURFACE, w*scale, h*scale, 8, 0,0,0,0);
assert(surf != NULL);
unsigned char* data = surf->pixels;
/*memcpy((_S)->format->palette->colors, base_palette, 16*sizeof(SDL_Color));*/
for (int y = 0; y < h; y++) for (int x = 0; x < w; x++) {
unsigned char pix = getpixel(bmp, x, y);
for (int i = 0; i < scale; i++) for (int j = 0; j < scale; j++) {
data[x*scale+i + (y*scale+j)*w*scale] = pix;
}
}
SDL_FreeSurface(bmp);
SDL_SetPalette(surf, SDL_PHYSPAL | SDL_LOGPAL, (SDL_Color*)base_palette, 0, 16);
SDL_SetColorKey(surf, SDL_SRCCOLORKEY, 0);
*s = surf;
}
#define LOGLOAD(w) printf("loading %s...", w)
#define LOGDONE() printf("done\n")
static void LoadData(void) {
LOGLOAD("gfx.bmp");
loadbmpscale("gfx.bmp", &gfx);
LOGDONE();
LOGLOAD("font.bmp");
loadbmpscale("font.bmp", &font);
LOGDONE();
static const char sndids[] = {0,1,2,3,4,5,6,7,8,9,13,14,15,16,23,35,37,38,40,50,51,54,55};
for (int iid = 0; iid < sizeof sndids; iid++) {
int id = sndids[iid];
char fname[20];
sprintf(fname, "snd%i.wav", id);
char path[4096];
LOGLOAD(fname);
GetDataPath(path, sizeof path, fname);
snd[id] = Mix_LoadWAV(path);
if (!snd[id]) {
ErrLog("snd%i: Mix_LoadWAV: %s\n", id, Mix_GetError());
}
LOGDONE();
}
static const char musids[] = {0,10,20,30,40};
for (int iid = 0; iid < sizeof musids; iid++) {
int id = musids[iid];
char fname[20];
sprintf(fname, "mus%i.ogg", id);
LOGLOAD(fname);
char path[4096];
GetDataPath(path, sizeof path, fname);
mus[id/10] = Mix_LoadMUS(path);
if (!mus[id/10]) {
ErrLog("mus%i: Mix_LoadMUS: %s\n", id, Mix_GetError());
}
LOGDONE();
}
}
#include "tilemap.h"
static Uint16 buttons_state = 0;
#define SDL_CHECK(r) do { \
if (!(r)) { \
ErrLog("%s:%i, fatal error: `%s` -> %s\n", \
__FILE__, __LINE__, #r, SDL_GetError()); \
exit(2); \
} \
} while(0)
static void p8_rectfill(int x0, int y0, int x1, int y1, int col);
static void p8_print(const char* str, int x, int y, int col);
//on-screen display (for info, such as loading a state, toggling screenshake, toggling fullscreen, etc)
static char osd_text[200] = "";
static int osd_timer = 0;
static void OSDset(const char* fmt, ...) {
va_list ap;
va_start(ap, fmt);
vsnprintf(osd_text, sizeof osd_text, fmt, ap);
osd_text[sizeof osd_text - 1] = '\0'; //make sure to add NUL terminator in case of truncation
printf("%s\n", osd_text);
osd_timer = 30;
va_end(ap);
}
static void OSDdraw(void) {
if (osd_timer > 0) {
--osd_timer;
const int x = 4;
const int y = 120 + (osd_timer < 10 ? 10-osd_timer : 0); //disappear by going below the screen
p8_rectfill(x-2, y-2, x+4*strlen(osd_text), y+6, 6); //outline
p8_rectfill(x-1, y-1, x+4*strlen(osd_text)-1, y+5, 0);
p8_print(osd_text, x, y, 7);
}
}
static Mix_Music* current_music = NULL;
static _Bool enable_screenshake = 1;
static _Bool paused = 0;
static _Bool running = 1;
static void* initial_game_state = NULL;
static void* game_state = NULL;
static Mix_Music* game_state_music = NULL;
static void mainLoop(void);
static FILE* TAS = NULL;
#ifdef _3DS
// hack: newer SDL versions remove SDL_N3DSKeyBind, but I'm too lazy to change the
// code to properly use SDL_Joystick inputs on 3DS so work around it ...
static short n3ds_key_map[32];
static void SDL_N3DSKeyBind(int n3dskey, int kbkey) {
for (int i = 0; i < 32; i++)
if (n3dskey & (1u << i))
n3ds_key_map[i] = kbkey;
}
#define SDL_GetKeyState n3ds_get_fake_key_state
static Uint8 *n3ds_get_fake_key_state(int *numkeys) {
static Uint8 st[SDLK_LAST];
if (numkeys) *numkeys = SDLK_LAST;
memset(st, 0, sizeof st);
hidScanInput();
Uint32 down = hidKeysDown();
Uint32 held = hidKeysHeld();
for (int i = 0; i < 32; i++) {
st[n3ds_key_map[i]] |= (held & (1u << i)) != 0;
if (down & (1u << i)) {
SDL_Event ev;
ev.type = SDL_KEYDOWN;
ev.key.keysym.sym = n3ds_key_map[i];
SDL_PushEvent(&ev);
}
}
return st;
}
#endif
int main(int argc, char** argv) {
SDL_CHECK(SDL_Init(SDL_INIT_AUDIO | SDL_INIT_VIDEO) == 0);
#if SDL_MAJOR_VERSION >= 2
SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER);
SDL_GameControllerAddMappingsFromRW(SDL_RWFromFile("gamecontrollerdb.txt", "rb"), 1);
#endif
int videoflag = SDL_SWSURFACE | SDL_HWPALETTE;
#ifdef _3DS
fsInit();
romfsInit();
videoflag = SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_CONSOLEBOTTOM | SDL_TOPSCR;
SDL_N3DSKeyBind(KEY_A, SDLK_z);
SDL_N3DSKeyBind(KEY_X|KEY_B, SDLK_x);
SDL_N3DSKeyBind(KEY_CPAD_UP|KEY_CSTICK_UP|KEY_DUP, SDLK_UP);
SDL_N3DSKeyBind(KEY_CPAD_DOWN|KEY_CSTICK_DOWN|KEY_DDOWN, SDLK_DOWN);
SDL_N3DSKeyBind(KEY_CPAD_LEFT|KEY_CSTICK_LEFT|KEY_DLEFT, SDLK_LEFT);
SDL_N3DSKeyBind(KEY_CPAD_RIGHT|KEY_CSTICK_RIGHT|KEY_DRIGHT, SDLK_RIGHT);
SDL_N3DSKeyBind(KEY_SELECT, SDLK_F11); //to switch full screen
SDL_N3DSKeyBind(KEY_START, SDLK_ESCAPE); //to pause
SDL_N3DSKeyBind(KEY_Y, SDLK_LSHIFT); //hold to reset / load/save state
SDL_N3DSKeyBind(KEY_L, SDLK_d); //load state
SDL_N3DSKeyBind(KEY_R, SDLK_s); //save state
#endif
SDL_CHECK(screen = SDL_SetVideoMode(PICO8_W*scale, PICO8_H*scale, 32, videoflag));
SDL_WM_SetCaption("Celeste", NULL);
int mixflag = MIX_INIT_OGG;
if (Mix_Init(mixflag) != mixflag) {
ErrLog("Mix_Init: %s\n", Mix_GetError());
}
if (Mix_OpenAudio(22050, AUDIO_S16SYS, 1, 1024) < 0) {
ErrLog("Mix_Init: %s\n", Mix_GetError());
}
ResetPalette();
SDL_ShowCursor(0);
if (argc > 1) {
TAS = fopen(argv[1], "r");
if (!TAS) {
printf("couldn't open TAS file '%s': %s\n", argv[1], strerror(errno));
}
}
printf("game state size %gkb\n", Celeste_P8_get_state_size()/1024.);
printf("now loading...\n");
{
const unsigned char loading_bmp[] = {
0x42,0x4d,0xca,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x82,0x00,
0x00,0x00,0x6c,0x00,0x00,0x00,0x24,0x00,0x00,0x00,0x09,0x00,
0x00,0x00,0x01,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x48,0x00,
0x00,0x00,0x23,0x2e,0x00,0x00,0x23,0x2e,0x00,0x00,0x02,0x00,
0x00,0x00,0x02,0x00,0x00,0x00,0x42,0x47,0x52,0x73,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0x00,0x00,0x00,
0x00,0x00,0xe0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x00,
0x00,0x00,0x66,0x3e,0xf1,0x24,0xf0,0x00,0x00,0x00,0x49,0x44,
0x92,0x24,0x90,0x00,0x00,0x00,0x49,0x3c,0x92,0x24,0x90,0x00,
0x00,0x00,0x49,0x04,0x92,0x24,0x90,0x00,0x00,0x00,0x46,0x38,
0xf0,0x3c,0xf0,0x00,0x00,0x00,0x40,0x00,0x12,0x00,0x00,0x00,
0x00,0x00,0xc0,0x00,0x10,0x00,0x00,0x00,0x00,0x00
};
SDL_RWops* rw = SDL_RWFromConstMem(loading_bmp, sizeof loading_bmp);
SDL_Surface* loading = SDL_LoadBMP_RW(rw, 1);
if (!loading) goto skip_load;
SDL_Rect rc = {60, 60};
SDL_BlitSurface(loading,NULL,screen,&rc);
SDL_Flip(screen);
SDL_FreeSurface(loading);
} skip_load:
LoadData();
int pico8emu(CELESTE_P8_CALLBACK_TYPE call, ...);
Celeste_P8_set_call_func(pico8emu);
//for reset
initial_game_state = SDL_malloc(Celeste_P8_get_state_size());
if (initial_game_state) Celeste_P8_save_state(initial_game_state);
if (TAS) {
// a consistent seed for tas playback
Celeste_P8_set_rndseed(8);
} else {
Celeste_P8_set_rndseed((unsigned)(time(NULL) + SDL_GetTicks()));
}
Celeste_P8_init();
printf("ready\n");
{
FILE* start_fullscreen_f = fopen("ccleste-start-fullscreen.txt", "r");
const char* start_fullscreen_v = getenv("CCLESTE_START_FULLSCREEN");
if (start_fullscreen_f || (start_fullscreen_v && *start_fullscreen_v)) {
SDL_WM_ToggleFullScreen(screen);
}
if (start_fullscreen_f) fclose(start_fullscreen_f);
}
#ifdef _3DS
while (aptMainLoop()) mainLoop();
#elif !defined(EMSCRIPTEN)
while (running) mainLoop();
#else
#include <emscripten.h>
//FIXME: this assumes that the display refreshes at 60Hz
emscripten_set_main_loop(mainLoop, 0, 0);
emscripten_set_main_loop_timing(EM_TIMING_RAF, 2);
return 0;
#endif
if (game_state) SDL_free(game_state);
if (initial_game_state) SDL_free(initial_game_state);
SDL_FreeSurface(gfx);
SDL_FreeSurface(font);
for (int i = 0; i < (sizeof snd)/(sizeof *snd); i++) {
if (snd[i]) Mix_FreeChunk(snd[i]);
}
for (int i = 0; i < (sizeof mus)/(sizeof *mus); i++) {
if (mus[i]) Mix_FreeMusic(mus[i]);
}
Mix_CloseAudio();
Mix_Quit();
SDL_Quit();
return 0;
}
#if SDL_MAJOR_VERSION >= 2
/* These inputs aren't sent to the game. */
enum {
PSEUDO_BTN_SAVE_STATE = 6,
PSEUDO_BTN_LOAD_STATE = 7,
PSEUDO_BTN_EXIT = 8,
PSEUDO_BTN_PAUSE = 9,
};
static void ReadGamepadInput(Uint16* out_buttons);
#endif
static void mainLoop(void) {
const Uint8* kbstate = SDL_GetKeyState(NULL);
static int reset_input_timer = 0;
//hold F9 (select+start+y) to reset
if (initial_game_state != NULL
#ifdef _3DS
&& kbstate[SDLK_LSHIFT] && kbstate[SDLK_ESCAPE] && kbstate[SDLK_F11]
#else
&& kbstate[SDLK_F9]
#endif
) {
reset_input_timer++;
if (reset_input_timer >= 30) {
reset_input_timer=0;
//reset
OSDset("reset");
paused = 0;
Celeste_P8_load_state(initial_game_state);
Celeste_P8_set_rndseed((unsigned)(time(NULL) + SDL_GetTicks()));
Mix_HaltChannel(-1);
Mix_HaltMusic();
Celeste_P8_init();
}
} else reset_input_timer = 0;
Uint16 prev_buttons_state = buttons_state;
buttons_state = 0;
#if SDL_MAJOR_VERSION >= 2
SDL_GameControllerUpdate();
ReadGamepadInput(&buttons_state);
if (!((prev_buttons_state >> PSEUDO_BTN_PAUSE) & 1)
&& (buttons_state >> PSEUDO_BTN_PAUSE) & 1) {
goto toggle_pause;
}
if (!((prev_buttons_state >> PSEUDO_BTN_EXIT) & 1)
&& (buttons_state >> PSEUDO_BTN_EXIT) & 1) {
goto press_exit;
}
if (!((prev_buttons_state >> PSEUDO_BTN_SAVE_STATE) & 1)
&& (buttons_state >> PSEUDO_BTN_SAVE_STATE) & 1) {
goto save_state;
}
if (!((prev_buttons_state >> PSEUDO_BTN_LOAD_STATE) & 1)
&& (buttons_state >> PSEUDO_BTN_LOAD_STATE) & 1) {
goto load_state;
}
#endif
SDL_Event ev;
while (SDL_PollEvent(&ev)) switch (ev.type) {
case SDL_QUIT: running = 0; break;
case SDL_KEYDOWN: {
#if SDL_MAJOR_VERSION >= 2
if (ev.key.repeat) break; //no key repeat
#endif
if (ev.key.keysym.sym == SDLK_ESCAPE) { //do pause
toggle_pause:
if (paused) Mix_Resume(-1), Mix_ResumeMusic(); else Mix_Pause(-1), Mix_PauseMusic();
paused = !paused;
break;
} else if (ev.key.keysym.sym == SDLK_DELETE) { //exit
press_exit:
running = 0;
break;
} else if (ev.key.keysym.sym == SDLK_F11 && !(kbstate[SDLK_LSHIFT] || kbstate[SDLK_ESCAPE])) {
if (SDL_WM_ToggleFullScreen(screen)) { //this doesn't work on windows..
OSDset("toggle fullscreen");
}
screen = SDL_GetVideoSurface();
break;
} else if (0 && ev.key.keysym.sym == SDLK_5) {
Celeste_P8__DEBUG();
break;
} else if (ev.key.keysym.sym == SDLK_s && kbstate[SDLK_LSHIFT]) { //save state
save_state:
game_state = game_state ? game_state : SDL_malloc(Celeste_P8_get_state_size());
if (game_state) {
OSDset("save state");
Celeste_P8_save_state(game_state);
game_state_music = current_music;
}
break;
} else if (ev.key.keysym.sym == SDLK_d && kbstate[SDLK_LSHIFT]) { //load state
load_state:
if (game_state) {
OSDset("load state");
if (paused) paused = 0, Mix_Resume(-1), Mix_ResumeMusic();
Celeste_P8_load_state(game_state);
if (current_music != game_state_music) {
Mix_HaltMusic();
current_music = game_state_music;
if (game_state_music) Mix_PlayMusic(game_state_music, -1);
}
}
break;
} else if ( //toggle screenshake (e / L+R)
#ifdef _3DS
(ev.key.keysym.sym == SDLK_d && kbstate[SDLK_s]) || (ev.key.keysym.sym == SDLK_s && kbstate[SDLK_d])
#else
ev.key.keysym.sym == SDLK_e
#endif
) {
enable_screenshake = !enable_screenshake;
OSDset("screenshake: %s", enable_screenshake ? "on" : "off");
} break;
}
}
if (!TAS) {
if (kbstate[SDLK_LEFT]) buttons_state |= (1<<0);
if (kbstate[SDLK_RIGHT]) buttons_state |= (1<<1);
if (kbstate[SDLK_UP]) buttons_state |= (1<<2);
if (kbstate[SDLK_DOWN]) buttons_state |= (1<<3);
if (kbstate[SDLK_z] || kbstate[SDLK_c] || kbstate[SDLK_n]) buttons_state |= (1<<4);
if (kbstate[SDLK_x] || kbstate[SDLK_v] || kbstate[SDLK_m]) buttons_state |= (1<<5);
} else if (TAS && !paused) {
static int t = 0;
t++;
if (t==1) buttons_state = 1<<4;
else if (t > 80) {
int btn;
fscanf(TAS, "%d,", &btn);
buttons_state = btn;
} else buttons_state = 0;
}
if (paused) {
const int x0 = PICO8_W/2-3*4, y0 = 8;
p8_rectfill(x0-1,y0-1, 6*4+x0+1,6+y0+1, 6);
p8_rectfill(x0,y0, 6*4+x0,6+y0, 0);
p8_print("paused", x0+1, y0+1, 7);
} else {
Celeste_P8_update();
Celeste_P8_draw();
}
OSDdraw();
SDL_Flip(screen);
#ifdef EMSCRIPTEN //emscripten_set_main_loop already sets the fps
SDL_Delay(1);
#elif defined(_3DS)
gspWaitForVBlank(), gspWaitForVBlank();
#else
static int t = 0;
static unsigned frame_start = 0;
unsigned frame_end = SDL_GetTicks();
unsigned frame_time = frame_end-frame_start;
unsigned target_millis;
// frame timing for 30fps is 33.333... ms, but we only have integer granularity
// so alternate between 33 and 34 ms, like [33,33,34,33,33,34,...] which averages out to 33.333...
if (t < 2) target_millis = 33;
else target_millis = 34;
if (++t == 3) t = 0;
if (frame_time < target_millis) {
SDL_Delay(target_millis - frame_time);
}
frame_start = SDL_GetTicks();
#endif
}
static int gettileflag(int, int);
static void p8_line(int,int,int,int,unsigned char);
//lots of code from https://github.com/SDL-mirror/SDL/blob/bc59d0d4a2c814900a506d097a381077b9310509/src/video/SDL_surface.c#L625
//coordinates should be scaled already
static inline void Xblit(SDL_Surface* src, SDL_Rect* srcrect, SDL_Surface* dst, SDL_Rect* dstrect, int color, int flipx, int flipy) {
assert(src && dst && !src->locked && !dst->locked);
assert(dst->format->BitsPerPixel == 32 && src->format->BitsPerPixel == 8);
SDL_Rect fulldst;
/* If the destination rectangle is NULL, use the entire dest surface */
if (!dstrect)
dstrect = (fulldst = (SDL_Rect){0,0,dst->w,dst->h}, &fulldst);
int srcx, srcy, w, h;
/* clip the source rectangle to the source surface */
if (srcrect) {
int maxw, maxh;
srcx = srcrect->x;
w = srcrect->w;
if (srcx < 0) {
w += srcx;
dstrect->x -= srcx;
srcx = 0;
}
maxw = src->w - srcx;
if (maxw < w)
w = maxw;
srcy = srcrect->y;
h = srcrect->h;
if (srcy < 0) {
h += srcy;
dstrect->y -= srcy;
srcy = 0;
}
maxh = src->h - srcy;
if (maxh < h)
h = maxh;
} else {
srcx = srcy = 0;
w = src->w;
h = src->h;
}
/* clip the destination rectangle against the clip rectangle */
{
SDL_Rect *clip = &dst->clip_rect;
int dx, dy;
dx = clip->x - dstrect->x;
if (dx > 0) {
w -= dx;
dstrect->x += dx;
srcx += dx;
}
dx = dstrect->x + w - clip->x - clip->w;
if (dx > 0)
w -= dx;
dy = clip->y - dstrect->y;
if (dy > 0) {
h -= dy;
dstrect->y += dy;
srcy += dy;
}
dy = dstrect->y + h - clip->y - clip->h;
if (dy > 0)
h -= dy;
}
if (w && h) {
unsigned char* srcpix = src->pixels;
int srcpitch = src->pitch;
Uint32* dstpix = dst->pixels;
#define _blitter(dp, xflip) do \
for (int y = 0; y < h; y++) for (int x = 0; x < w; x++) { \
unsigned char p = srcpix[!xflip ? srcx+x+(srcy+y)*srcpitch : srcx+(w-x-1)+(srcy+y)*srcpitch]; \
if (p) dstpix[dstrect->x+x + (dstrect->y+y)*dst->w] = getcolor(dp); \
} while(0)
if (color && flipx) _blitter(color, 1);
else if (!color && flipx) _blitter(p, 1);
else if (color && !flipx) _blitter(color, 0);
else if (!color && !flipx) _blitter(p, 0);
#undef _blitter
}
}
static void p8_rectfill(int x0, int y0, int x1, int y1, int col) {
int w = (x1 - x0 + 1)*scale;
int h = (y1 - y0 + 1)*scale;
if (w > 0 && h > 0) {
SDL_Rect rc = {x0*scale,y0*scale, w,h};
SDL_FillRect(screen, &rc, getcolor(col));
}
}
static void p8_print(const char* str, int x, int y, int col) {
for (char c = *str; c; c = *(++str)) {
c &= 0x7F;
SDL_Rect srcrc = {8*(c%16), 8*(c/16)};
srcrc.x *= scale;
srcrc.y *= scale;
srcrc.w = srcrc.h = 8*scale;
SDL_Rect dstrc = {x*scale, y*scale, scale, scale};
Xblit(font, &srcrc, screen, &dstrc, col, 0,0);
x += 4;
}
}
int pico8emu(CELESTE_P8_CALLBACK_TYPE call, ...) {
static int camera_x = 0, camera_y = 0;
if (!enable_screenshake) {
camera_x = camera_y = 0;
}
va_list args;
int ret = 0;
va_start(args, call);
#define INT_ARG() va_arg(args, int)
#define BOOL_ARG() (Celeste_P8_bool_t)va_arg(args, int)
#define RET_INT(_i) do {ret = (_i); goto end;} while (0)
#define RET_BOOL(_b) RET_INT(!!(_b))
switch (call) {
case CELESTE_P8_MUSIC: { //music(idx,fade,mask)
int index = INT_ARG();
int fade = INT_ARG();
int mask = INT_ARG();
(void)mask; //we do not care about this since sdl mixer keeps sounds and music separate
if (index == -1) { //stop playing
Mix_FadeOutMusic(fade);
current_music = NULL;
} else if (mus[index/10]) {
Mix_Music* musi = mus[index/10];
current_music = musi;
Mix_FadeInMusic(musi, -1, fade);
}
} break;
case CELESTE_P8_SPR: { //spr(sprite,x,y,cols,rows,flipx,flipy)
int sprite = INT_ARG();
int x = INT_ARG();
int y = INT_ARG();
int cols = INT_ARG();
int rows = INT_ARG();
int flipx = BOOL_ARG();
int flipy = BOOL_ARG();
(void)cols;
(void)rows;
assert(rows == 1 && cols == 1);
if (sprite >= 0) {
SDL_Rect srcrc = {
8*(sprite % 16),
8*(sprite / 16)
};
srcrc.x *= scale;
srcrc.y *= scale;
srcrc.w = srcrc.h = scale*8;
SDL_Rect dstrc = {
(x - camera_x)*scale, (y - camera_y)*scale,
scale, scale
};
Xblit(gfx, &srcrc, screen, &dstrc, 0,flipx,flipy);
}
} break;
case CELESTE_P8_BTN: { //btn(b)
int b = INT_ARG();
assert(b >= 0 && b <= 5);
RET_BOOL(buttons_state & (1 << b));
} break;
case CELESTE_P8_SFX: { //sfx(id)
int id = INT_ARG();
if (id < (sizeof snd) / (sizeof*snd) && snd[id])
Mix_PlayChannel(-1, snd[id], 0);
} break;
case CELESTE_P8_PAL: { //pal(a,b)
int a = INT_ARG();
int b = INT_ARG();
if (a >= 0 && a < 16 && b >= 0 && b < 16) {
//swap palette colors
palette[a] = base_palette[b];
}
} break;
case CELESTE_P8_PAL_RESET: { //pal()
ResetPalette();
} break;
case CELESTE_P8_CIRCFILL: { //circfill(x,y,r,col)
int cx = INT_ARG() - camera_x;
int cy = INT_ARG() - camera_y;
int r = INT_ARG();
int col = INT_ARG();
int realcolor = getcolor(col);
if (r <= 1) {
SDL_FillRect(screen, &(SDL_Rect){scale*(cx-1), scale*cy, scale*3, scale}, realcolor);
SDL_FillRect(screen, &(SDL_Rect){scale*cx, scale*(cy-1), scale, scale*3}, realcolor);
} else if (r <= 2) {
SDL_FillRect(screen, &(SDL_Rect){scale*(cx-2), scale*(cy-1), scale*5, scale*3}, realcolor);
SDL_FillRect(screen, &(SDL_Rect){scale*(cx-1), scale*(cy-2), scale*3, scale*5}, realcolor);
} else if (r <= 3) {
SDL_FillRect(screen, &(SDL_Rect){scale*(cx-3), scale*(cy-1), scale*7, scale*3}, realcolor);
SDL_FillRect(screen, &(SDL_Rect){scale*(cx-1), scale*(cy-3), scale*3, scale*7}, realcolor);
SDL_FillRect(screen, &(SDL_Rect){scale*(cx-2), scale*(cy-2), scale*5, scale*5}, realcolor);
} else { //i dont think the game uses this
int f = 1 - r; //used to track the progress of the drawn circle (since its semi-recursive)
int ddFx = 1; //step x
int ddFy = -2 * r; //step y
int x = 0;
int y = r;
//this algorithm doesn't account for the diameters
//so we have to set them manually
p8_line(cx,cy-y, cx,cy+r, col);
p8_line(cx+r,cy, cx-r,cy, col);
while (x < y) {
if (f >= 0) {
y--;
ddFy += 2;
f += ddFy;
}
x++;
ddFx += 2;
f += ddFx;
//build our current arc
p8_line(cx+x,cy+y, cx-x,cy+y, col);
p8_line(cx+x,cy-y, cx-x,cy-y, col);
p8_line(cx+y,cy+x, cx-y,cy+x, col);
p8_line(cx+y,cy-x, cx-y,cy-x, col);
}
}
} break;
case CELESTE_P8_PRINT: { //print(str,x,y,col)
const char* str = va_arg(args, const char*);
int x = INT_ARG() - camera_x;
int y = INT_ARG() - camera_y;
int col = INT_ARG() % 16;
#ifdef _3DS
if (!strcmp(str, "x+c")) {
//this is confusing, as 3DS uses a+b button, so use this hack to make it more appropiate
str = "a+b";
}
#endif
p8_print(str,x,y,col);
} break;
case CELESTE_P8_RECTFILL: { //rectfill(x0,y0,x1,y1,col)
int x0 = INT_ARG() - camera_x;
int y0 = INT_ARG() - camera_y;
int x1 = INT_ARG() - camera_x;
int y1 = INT_ARG() - camera_y;
int col = INT_ARG();
p8_rectfill(x0,y0,x1,y1,col);
} break;
case CELESTE_P8_LINE: { //line(x0,y0,x1,y1,col)
int x0 = INT_ARG() - camera_x;
int y0 = INT_ARG() - camera_y;
int x1 = INT_ARG() - camera_x;
int y1 = INT_ARG() - camera_y;
int col = INT_ARG();
p8_line(x0,y0,x1,y1,col);
} break;
case CELESTE_P8_MGET: { //mget(tx,ty)
int tx = INT_ARG();
int ty = INT_ARG();
RET_INT(tilemap_data[tx+ty*128]);
} break;
case CELESTE_P8_CAMERA: { //camera(x,y)
if (enable_screenshake) {
camera_x = INT_ARG();
camera_y = INT_ARG();
}
} break;
case CELESTE_P8_FGET: { //fget(tile,flag)
int tile = INT_ARG();
int flag = INT_ARG();
RET_INT(gettileflag(tile, flag));
} break;
case CELESTE_P8_MAP: { //map(mx,my,tx,ty,mw,mh,mask)
int mx = INT_ARG(), my = INT_ARG();
int tx = INT_ARG(), ty = INT_ARG();
int mw = INT_ARG(), mh = INT_ARG();
int mask = INT_ARG();
for (int x = 0; x < mw; x++) {
for (int y = 0; y < mh; y++) {
int tile = tilemap_data[x + mx + (y + my)*128];
//hack
if (mask == 0 || (mask == 4 && tile_flags[tile] == 4) || gettileflag(tile, mask != 4 ? mask-1 : mask)) {
SDL_Rect srcrc = {
8*(tile % 16),
8*(tile / 16)
};
srcrc.x *= scale;
srcrc.y *= scale;
srcrc.w = srcrc.h = scale*8;
SDL_Rect dstrc = {
(tx+x*8 - camera_x)*scale, (ty+y*8 - camera_y)*scale,
scale*8, scale*8
};
if (0) {
srcrc.x = srcrc.y = 0;
srcrc.w = srcrc.h = 8;
dstrc.x = x*8, dstrc.y = y*8;
dstrc.w = dstrc.h = 8;
}
Xblit(gfx, &srcrc, screen, &dstrc, 0, 0, 0);
}
}
}
} break;
}
end:
va_end(args);
return ret;
}
static int gettileflag(int tile, int flag) {
return tile < sizeof(tile_flags)/sizeof(*tile_flags) && (tile_flags[tile] & (1 << flag)) != 0;
}
//coordinates should NOT be scaled before calling this
static void p8_line(int x0, int y0, int x1, int y1, unsigned char color) {
#define CLAMP(v,min,max) v = v < min ? min : v >= max ? max-1 : v;
CLAMP(x0,0,screen->w);
CLAMP(y0,0,screen->h);
CLAMP(x1,0,screen->w);
CLAMP(y1,0,screen->h);
Uint32 realcolor = getcolor(color);
#undef CLAMP
#define PLOT(x,y) do { \
SDL_FillRect(screen, &(SDL_Rect){x*scale,y*scale,scale,scale}, realcolor); \
} while (0)
int sx, sy, dx, dy, err, e2;
dx = abs(x1 - x0);
dy = abs(y1 - y0);
if (!dx && !dy) return;
if (x0 < x1) sx = 1; else sx = -1;
if (y0 < y1) sy = 1; else sy = -1;
err = dx - dy;
if (!dy && !dx) return;
else if (!dx) { //vertical line
for (int y = y0; y != y1; y += sy) PLOT(x0,y);
} else if (!dy) { //horizontal line
for (int x = x0; x != x1; x += sx) PLOT(x,y0);
} while (x0 != x1 || y0 != y1) {
PLOT(x0, y0);
e2 = 2 * err;
if (e2 > -dy) {
err -= dy;
x0 += sx;
}
if (e2 < dx) {
err += dx;
y0 += sy;
}
}
#undef PLOT
}
#if SDL_MAJOR_VERSION >= 2
//SDL2: read input from connected gamepad
struct mapping {
SDL_GameControllerButton sdl_btn;
Uint16 pico8_btn;
};
static const char* pico8_btn_names[] = {
"left", "right", "up", "down", "jump", "dash", "save", "load", "exit", "pause"
};
// initialized with default mapping
static struct mapping controller_mappings[30] = {
{SDL_CONTROLLER_BUTTON_DPAD_LEFT, 0}, //left
{SDL_CONTROLLER_BUTTON_DPAD_RIGHT, 1}, //right
{SDL_CONTROLLER_BUTTON_DPAD_UP, 2}, //up
{SDL_CONTROLLER_BUTTON_DPAD_DOWN, 3}, //down
{SDL_CONTROLLER_BUTTON_A, 4}, //jump
{SDL_CONTROLLER_BUTTON_B, 5}, //dash
{SDL_CONTROLLER_BUTTON_LEFTSHOULDER, PSEUDO_BTN_SAVE_STATE}, //save
{SDL_CONTROLLER_BUTTON_RIGHTSHOULDER, PSEUDO_BTN_LOAD_STATE}, //load
{SDL_CONTROLLER_BUTTON_GUIDE, PSEUDO_BTN_EXIT}, //exit
{SDL_CONTROLLER_BUTTON_START, PSEUDO_BTN_PAUSE}, //pause
{0xff, 0xff}
};
static const Uint16 stick_deadzone = 32767 / 2; //about half