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mcmain.c
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#include "mc_sdl_compat.h"
#include <math.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <time.h>
#include <stdbool.h>
#include "celeste.h"
extern void print(int);
static void ErrLog(const char* fmt, ...) {
va_list ap;
va_start(ap, fmt);
vprintf(fmt, ap);
va_end(ap);
}
SDL_Surface* gfx = NULL;
SDL_Surface* font = NULL;
#define PICO8_W 128
#define PICO8_H 128
static const int scale = 1;
/*
#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 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:
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;
}
for (int i = 0; i < /*surf->w * surf->h*/ 256; ++i) {
unsigned char *data = bmp->pixels;
//if (data[i] != 0) {
printf("%x, ", (int)data[i]);
//}
}
printf("\n");
*s = bmp;
}
#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();
}
#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 _Bool enable_screenshake = 1;
static _Bool paused = 0;
static _Bool running = 1;
static void* initial_game_state = NULL;
static void* game_state = 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);
SDL_InitSubSystem(SDL_INIT_GAMECONTROLLER);
ResetPalette();
if (argc > 1) {
TAS = fopen(argv[1], "r");
if (!TAS) {
printf("couldn't open TAS file '%s': %s\n", argv[1], strerror(errno));
}
}
print(1);
size_t state_size = Celeste_P8_get_state_size()/1024;
print(state_size);
printf("game state size %lukb\n", state_size);
print(2);
printf("now loading...\n");
print(3);
/*{
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:*/
mc_sleep();
print(4);
LoadData();
print(5);
mc_sleep();
print(6);
int pico8emu(CELESTE_P8_CALLBACK_TYPE call, ...);
Celeste_P8_set_call_func(pico8emu);
print(7);
mc_sleep();
print(8);
//for reset
//initial_game_state = SDL_malloc(Celeste_P8_get_state_size());
//if (initial_game_state) Celeste_P8_save_state(initial_game_state);
print(9);
mc_sleep();
print(10);
Celeste_P8_set_rndseed(8);
print(11);
Celeste_P8_init();
print(12);
mc_sleep();
printf("ready\n");
while (running) mainLoop();
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) {
print(13);
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(8);
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:
paused = !paused;
break;
} else if (ev.key.keysym.sym == SDLK_DELETE) { //exit
press_exit:
running = 0;
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");
Celeste_P8_load_state(game_state);
}
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();
mc_present();
mc_sleep();
mc_sleep();
/*
#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);
void _blitter(
uint8_t *srcpix, int srcx, int srcy, int srcpitch,
SDL_Rect *dstrect, int dst_w,
int w, int h,
int xflip
) {
if (dstrect->x + w > 128) {
w -= (dstrect->x + w - 128);
}
if (dstrect->y + h > 128) {
h -= (dstrect->y + h - 128);
}
for (int y = 0; y < h; y++) {
int dsty = dstrect->y + y;
turtle_y(128 - dsty);
for (int x = 0; x < w; x++) {
int dstx = dstrect->x + x;
turtle_x(128 - dstx);
int xoff = xflip ? (w-x-1) : (x);
int srcx_p = srcx + xoff;
int srcy_p = srcy + y;
unsigned char p = srcpix[srcx_p+(srcy_p)*srcpitch];
if (p) {
turtle_set(palette_colors[p % 16]);
}
}
}
}
void _blitter_masked(
uint8_t *srcpix, int srcx, int srcy, int srcpitch,
SDL_Rect *dstrect, int dst_w,
int w, int h,
int dp, int xflip
) {
if (dstrect->x + w > 128) {
w -= (dstrect->x + w - 128);
}
if (dstrect->y + h > 128) {
h -= (dstrect->y + h - 128);
}
if (w == 0 || h == 0) {
return;
}
// TODO: If x or y are outside the screen, this won't work
SDL_SetPixel_screen_palette(dstrect->x, dstrect->y, dp);
turtle_copy();
for (int y = 0; y < h; y++) {
int dsty = dstrect->y + y;
turtle_y(128 - dsty);
for (int x = 0; x < w; x++) {
int dstx = dstrect->x + x;
turtle_x(128 - dstx);
int xoff = xflip ? (w-x-1) : (x);
int srcx_p = srcx + xoff;
int srcy_p = srcy + y;
unsigned char p = srcpix[srcx_p+(srcy_p)*srcpitch];
if (p) {
SDL_SetPixel_screen_palette(dstx, dsty, dp);
//turtle_paste();
}
}
}
}
//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_Rect* dstrect, int color, int flipx, int flipy) {
mc_sleep();
int dst_w = PICO8_W;
int dst_h = PICO8_H;
assert(src && !src->locked);
assert(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 = (unsigned char*)src->pixels;
int srcpitch = src->pitch;
if (color) {
_blitter_masked(
srcpix, srcx, srcy, srcpitch,
dstrect, dst_w,
w, h,
color, flipx
);
} else {
_blitter(
srcpix, srcx, srcy, srcpitch,
dstrect, dst_w,
w, h,
flipx
);
}
}
}
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_palette(&rc, 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, &dstrc, col, 0,0);
x += 4;
}
}
void FillRectFixed(SDL_Rect rect, char rc) {
SDL_FillRect_screen_palette(&rect, rc);
}
int camera_x, camera_y = 0;
int pico8emu(CELESTE_P8_CALLBACK_TYPE call, ...) {
print(call);
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)index; (void)fade;
(void)mask; //we do not care about this since sdl mixer keeps sounds and music separate
} 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, &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();
} 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();
if (r <= 1) {
FillRectFixed((SDL_Rect){scale*(cx-1), scale*cy, scale*3, scale}, col);
FillRectFixed((SDL_Rect){scale*cx, scale*(cy-1), scale, scale*3}, col);
} else if (r <= 2) {
FillRectFixed((SDL_Rect){scale*(cx-2), scale*(cy-1), scale*5, scale*3}, col);
FillRectFixed((SDL_Rect){scale*(cx-1), scale*(cy-2), scale*3, scale*5}, col);
} else if (r <= 3) {
FillRectFixed((SDL_Rect){scale*(cx-3), scale*(cy-1), scale*7, scale*3}, col);
FillRectFixed((SDL_Rect){scale*(cx-1), scale*(cy-3), scale*3, scale*7}, col);
FillRectFixed((SDL_Rect){scale*(cx-2), scale*(cy-2), scale*5, scale*5}, col);
} 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++) {
mc_sleep();
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, &dstrc, 0, 0, 0);
}
}
}
} break;
}
end:
va_end(args);
return ret;
}
void P8music(int track, int fade, int mask) {
// No-op
}
void P8spr(int sprite, int x, int y, int cols, int rows, bool flipx, bool flipy) {
(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, &dstrc, 0,flipx,flipy);
}
}
bool P8btn(int b) {
assert(b >= 0 && b <= 5);
return buttons_state & (1 << b);
}
void P8sfx(int id) {
// No-op
}
void P8pal(int a, int b) {
if (a >= 0 && a < 16 && b >= 0 && b < 16) {
//swap palette colors
palette[a] = base_palette[b];
}
}
void P8pal_reset() {
ResetPalette();
}
void P8circfill(int x, int y, int r, int col) {
int cx = x - camera_x;
int cy = y - camera_y;
if (r <= 1) {
FillRectFixed((SDL_Rect){scale*(cx-1), scale*cy, scale*3, scale}, col);
FillRectFixed((SDL_Rect){scale*cx, scale*(cy-1), scale, scale*3}, col);
} else if (r <= 2) {
FillRectFixed((SDL_Rect){scale*(cx-2), scale*(cy-1), scale*5, scale*3}, col);
FillRectFixed((SDL_Rect){scale*(cx-1), scale*(cy-2), scale*3, scale*5}, col);
} else if (r <= 3) {
FillRectFixed((SDL_Rect){scale*(cx-3), scale*(cy-1), scale*7, scale*3}, col);
FillRectFixed((SDL_Rect){scale*(cx-1), scale*(cy-3), scale*3, scale*7}, col);
FillRectFixed((SDL_Rect){scale*(cx-2), scale*(cy-2), scale*5, scale*5}, col);
} else { //i dont think the game uses this