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rockbox/apps/plugins/2048.c
Franklin Wei b61553c2b1 Added 2048 game 
Change-Id: I4012dca4f93ca0db386a454635534f648ba906e9
Reviewed-on: http://gerrit.rockbox.org/888
Reviewed-by: Michael Giacomelli <giac2000@hotmail.com>
Tested: Michael Giacomelli <giac2000@hotmail.com>
2014-08-12 00:01:24 +02:00

916 lines
26 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2014 Franklin Wei
*
* Clone of 2048 by Gabriele Cirulli
*
* Thanks to [Saint], saratoga, and gevaerts for answering all my n00b
* questions :)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* TODO
* Sounds!
* Better animations!
*/
/* includes */
#include <plugin.h>
#include "lib/display_text.h"
#include "lib/helper.h"
#include "lib/highscore.h"
#include "lib/playback_control.h"
#include "lib/pluginlib_actions.h"
#include "lib/pluginlib_exit.h"
#ifdef HAVE_LCD_BITMAP
#include "pluginbitmaps/_2048_background.h"
#include "pluginbitmaps/_2048_tiles.h"
#endif
/* defines */
#define ANIM_SLEEPTIME (HZ/20)
#define GRID_SIZE 4
#define HISCORES_FILE PLUGIN_GAMES_DATA_DIR "/2048.score"
#define NUM_SCORES 5
#define NUM_STARTING_TILES 2
#define RESUME_FILE PLUGIN_GAMES_DATA_DIR "/2048.save"
#define WHAT_FONT FONT_UI
#define SPACES (GRID_SIZE*GRID_SIZE)
#define MIN_SPACE (BMPHEIGHT__2048_tiles*0.134) /* space between tiles */
#define MAX_UNDOS 64
#define VERT_SPACING 4
#define WINNING_TILE 2048
/* screen-specific configuration */
#if LCD_WIDTH<LCD_HEIGHT
/* tall screens */
#define TITLE_X 0
#define TITLE_Y 0
#define BASE_Y (BMPHEIGHT__2048_tiles*1.5)
#define BASE_X (BMPHEIGHT__2048_tiles*.5-MIN_SPACE)
#define SCORE_X 0
#define SCORE_Y (max_numeral_height)
#define BEST_SCORE_X 0
#define BEST_SCORE_Y (2*max_numeral_height)
#else
/* wide screens or square screens*/
#define TITLE_X 0
#define TITLE_Y 0
#define BASE_X (LCD_WIDTH-(GRID_SIZE*BMPHEIGHT__2048_tiles)-(((GRID_SIZE+1)*MIN_SPACE)))
#define BASE_Y (BMPHEIGHT__2048_tiles*.5-MIN_SPACE)
#define SCORE_X 0
#define SCORE_Y (max_numeral_height)
#define BEST_SCORE_X 0
#define BEST_SCORE_Y (2*max_numeral_height)
#endif
#define BACKGROUND_X (BASE_X-MIN_SPACE)
#define BACKGROUND_Y (BASE_Y-MIN_SPACE)
/* key mappings */
#define KEY_UP PLA_UP
#define KEY_DOWN PLA_DOWN
#define KEY_LEFT PLA_LEFT
#define KEY_RIGHT PLA_RIGHT
#define KEY_EXIT PLA_CANCEL
#define KEY_UNDO PLA_SELECT
/* colors */
#define BACKGROUND (LCD_RGBPACK(0xfa, 0xf8, 0xef))
#define BOARD_BACKGROUND (LCD_RGBPACK(0xbb, 0xad, 0xa0))
#define TEXT_COLOR (LCD_RGBPACK(0x77, 0x6e, 0x65))
static const struct button_mapping *plugin_contexts[] = { pla_main_ctx };
/* game data */
struct game_ctx_t {
int grid[GRID_SIZE][GRID_SIZE];
int score;
int cksum; /* sum of grid, XORed by score */
bool already_won;
};
static struct game_ctx_t ctx_data;
/* use a pointer to make save/load easier */
static struct game_ctx_t *ctx=&ctx_data;
/* temporary data */
static bool merged_grid[GRID_SIZE][GRID_SIZE];
static int old_grid[GRID_SIZE][GRID_SIZE];
static int max_numeral_height=-1;
static bool loaded=false;
/* first init_game will set this, when it is exceeded, it will be updated in the slide functions */
static int best_score;
static bool abnormal_exit=true;
static struct highscore highscores[NUM_SCORES];
/* returns a random int between min and max */
static inline int rand_range(int min, int max)
{
return rb->rand()%(max-min+1)+min;
}
/* prepares to exit */
static void cleanup(void)
{
backlight_use_settings();
}
/* returns 2 or 4 */
static inline int rand_2_or_4(void)
{
/* 1 in 10 chance of a four */
if(rb->rand()%10==0)
return 4;
else
return 2;
}
/* display the help text */
static bool do_help(void)
{
#ifdef HAVE_LCD_COLOR
rb->lcd_set_foreground(LCD_WHITE);
rb->lcd_set_background(LCD_BLACK);
#endif
rb->lcd_setfont(FONT_UI);
char* help_text[]= {"2048", "", "Aim",
"", "Join", "the", "numbers", "to", "get", "to", "the", "2048", "tile!", "", "",
"How", "to", "Play", "",
"", "Use", "the", "directional", "keys", "to", "move", "the", "tiles.", "When",
"two", "tiles", "with", "the", "same", "number", "touch,", "they", "merge", "into", "one!"};
struct style_text style[]={
{0, TEXT_CENTER|TEXT_UNDERLINE},
{2, C_RED},
{15, C_RED}, {16, C_RED}, {17,C_RED},
LAST_STYLE_ITEM
};
return display_text(ARRAYLEN(help_text), help_text, style,NULL,true);
}
/*** the logic for sliding ***/
/* this is the helper function that does the actual tile moving */
static inline void slide_internal(int startx, int starty,
int stopx, int stopy,
int dx, int dy,
int lookx, int looky)
{
int best_score_before=best_score;
for(int y=starty;y!=stopy;y+=dy)
{
for(int x=startx;x!=stopx;x+=dx)
{
if(ctx->grid[x+lookx][y+looky]==ctx->grid[x][y] && ctx->grid[x][y] && !merged_grid[x+lookx][y+looky] && !merged_grid[x][y]) /* Slide into */
{
/* Each merged tile cannot be merged again */
merged_grid[x+lookx][y+looky]=true;
ctx->grid[x+lookx][y+looky]=2*ctx->grid[x][y];
ctx->score+=ctx->grid[x+lookx][y+looky];
ctx->grid[x][y]=0;
}
else if(ctx->grid[x+lookx][y+looky]==0) /* Empty! */
{
ctx->grid[x+lookx][y+looky]=ctx->grid[x][y];
ctx->grid[x][y]=0;
}
}
}
if(ctx->score>best_score_before)
best_score=ctx->score;
}
/* these functions move each tile 1 space in the direction specified via calls to slide_internal */
/* Up
0
1 ^ ^ ^ ^
2 ^ ^ ^ ^
3 ^ ^ ^ ^
0 1 2 3
*/
static void up(void)
{
slide_internal(0, 1, /* start values */
GRID_SIZE, GRID_SIZE, /* stop values */
1, 1, /* delta values */
0, -1); /* lookahead values */
}
/* Down
0 v v v v
1 v v v v
2 v v v v
3
0 1 2 3
*/
static void down(void)
{
slide_internal(0, GRID_SIZE-2,
GRID_SIZE, -1,
1, -1,
0, 1);
}
/* Left
0 < < <
1 < < <
2 < < <
3 < < <
0 1 2 3
*/
static void left(void)
{
slide_internal(1, 0,
GRID_SIZE, GRID_SIZE,
1, 1,
-1, 0);
}
/* Right
0 > > >
1 > > >
2 > > >
3 > > >
0 1 2 3
*/
static void right(void)
{
slide_internal(GRID_SIZE-2, 0, /* start */
-1, GRID_SIZE, /* stop */
-1, 1, /* delta */
1, 0); /* lookahead */
}
/* slightly modified version of base 2 log, returns 1 when given zero, and log2(n)+1 for anything else */
static inline int ilog2(int n)
{
if(n==0)
return 1;
int log=0;
while(n>1)
{
n>>=1;
++log;
}
return log+1;
}
static void draw(void)
{
#ifdef HAVE_LCD_COLOR
rb->lcd_set_background(BACKGROUND);
#endif
rb->lcd_clear_display();
/* draw the background */
rb->lcd_bitmap(_2048_background, BACKGROUND_X, BACKGROUND_Y, BMPWIDTH__2048_background, BMPWIDTH__2048_background);
/*
grey_gray_bitmap(_2048_background, BACKGROUND_X, BACKGROUND_Y, BMPWIDTH__2048_background, BMPHEIGHT__2048_background);
*/
/* draw the grid */
for(int y=0;y<GRID_SIZE;++y)
{
for(int x=0;x<GRID_SIZE;++x)
{
rb->lcd_bitmap_part(_2048_tiles, /* source */
BMPWIDTH__2048_tiles-BMPHEIGHT__2048_tiles*ilog2(ctx->grid[x][y]), 0, /* source upper left corner */
STRIDE(SCREEN_MAIN, BMPWIDTH__2048_tiles, BMPHEIGHT__2048_tiles), /* stride */
(BMPHEIGHT__2048_tiles+MIN_SPACE)*x+BASE_X, (BMPHEIGHT__2048_tiles+MIN_SPACE)*y+BASE_Y, /* dest upper-left corner */
BMPHEIGHT__2048_tiles, BMPHEIGHT__2048_tiles); /* size of the cut section */
}
}
/* draw the title */
char buf[32];
#ifdef HAVE_LCD_COLOR
rb->lcd_set_foreground(TEXT_COLOR);
#endif
rb->snprintf(buf, 31, "%d", WINNING_TILE);
/* check if the title will go into the grid */
int w, h;
rb->lcd_setfont(FONT_UI);
rb->font_getstringsize(buf, &w, &h, FONT_UI);
if(w+TITLE_X>=BACKGROUND_X && h+TITLE_Y>=BACKGROUND_Y)
{
/* if it goes into the grid, use the system font, which should be smaller */
rb->lcd_setfont(FONT_SYSFIXED);
}
rb->lcd_putsxy(TITLE_X, TITLE_Y, buf);
/* draw the score */
rb->snprintf(buf, 31, "Score: %d", ctx->score);
#ifdef HAVE_LCD_COLOR
rb->lcd_set_foreground(LCD_WHITE);
rb->lcd_set_background(BOARD_BACKGROUND);
#endif
rb->lcd_setfont(FONT_UI);
rb->font_getstringsize(buf, &w, &h, FONT_UI);
if(w+SCORE_X>=BACKGROUND_X && h+SCORE_Y>=BACKGROUND_Y)
{
/* score overflows */
/* first see if it fits with Score: and FONT_SYSFIXED */
rb->lcd_setfont(FONT_SYSFIXED);
rb->font_getstringsize(buf, &w, &h, FONT_SYSFIXED);
if(w+SCORE_X < BACKGROUND_X)
/* it fits, go and draw it */
goto draw_lbl;
/* now try with S: and FONT_UI */
rb->snprintf(buf, 31, "S: %d", ctx->score);
rb->font_getstringsize(buf, &w, &h, FONT_UI);
rb->lcd_setfont(FONT_UI);
if(w+SCORE_X<BACKGROUND_X)
goto draw_lbl;
/* now try with S: and FONT_SYSFIXED */
rb->snprintf(buf, 31, "S: %d", ctx->score);
rb->font_getstringsize(buf, &w, &h, FONT_SYSFIXED);
rb->lcd_setfont(FONT_SYSFIXED);
if(w+SCORE_X<BACKGROUND_X)
goto draw_lbl;
/* then try without Score: and FONT_UI */
rb->snprintf(buf, 31, "%d", ctx->score);
rb->font_getstringsize(buf, &w, &h, FONT_UI);
rb->lcd_setfont(FONT_UI);
if(w+SCORE_X<BACKGROUND_X)
goto draw_lbl;
/* as a last resort, don't use Score: and use the system font */
rb->snprintf(buf, 31, "%d", ctx->score);
rb->lcd_setfont(FONT_SYSFIXED);
}
draw_lbl:
rb->lcd_putsxy(SCORE_X, SCORE_Y, buf);
/* draw the best score */
rb->snprintf(buf, 31, "Best: %d", best_score);
#ifdef HAVE_LCD_COLOR
rb->lcd_set_foreground(LCD_WHITE);
rb->lcd_set_background(BOARD_BACKGROUND);
#endif
rb->lcd_setfont(FONT_UI);
rb->font_getstringsize(buf, &w, &h, FONT_UI);
if(w+BEST_SCORE_X>=BACKGROUND_X && h+BEST_SCORE_Y>=BACKGROUND_Y)
{
/* score overflows */
/* first see if it fits with Score: and FONT_SYSFIXED */
rb->lcd_setfont(FONT_SYSFIXED);
rb->font_getstringsize(buf, &w, &h, FONT_SYSFIXED);
if(w+BEST_SCORE_X < BACKGROUND_X)
/* it fits, go and draw it */
goto draw_best;
/* now try with S: and FONT_UI */
rb->snprintf(buf, 31, "B: %d", best_score);
rb->font_getstringsize(buf, &w, &h, FONT_UI);
rb->lcd_setfont(FONT_UI);
if(w+BEST_SCORE_X<BACKGROUND_X)
goto draw_best;
/* now try with S: and FONT_SYSFIXED */
rb->snprintf(buf, 31, "B: %d", best_score);
rb->font_getstringsize(buf, &w, &h, FONT_SYSFIXED);
rb->lcd_setfont(FONT_SYSFIXED);
if(w+BEST_SCORE_X<BACKGROUND_X)
goto draw_best;
/* then try without Score: and FONT_UI */
rb->snprintf(buf, 31, "%d", best_score);
rb->font_getstringsize(buf, &w, &h, FONT_UI);
rb->lcd_setfont(FONT_UI);
if(w+BEST_SCORE_X<BACKGROUND_X)
goto draw_best;
/* as a last resort, don't use Score: and use the system font */
rb->snprintf(buf, 31, "%d", best_score);
rb->lcd_setfont(FONT_SYSFIXED);
}
draw_best:
rb->lcd_putsxy(BEST_SCORE_X, BEST_SCORE_Y, buf);
rb->lcd_update();
/* revert the font back */
rb->lcd_setfont(WHAT_FONT);
}
/* place a 2 or 4 in a random empty space */
static void place_random(void)
{
int xpos[SPACES],ypos[SPACES];
int back=0;
/* get the indexes of empty spaces */
for(int y=0;y<GRID_SIZE;++y)
for(int x=0;x<GRID_SIZE;++x)
{
if(!ctx->grid[x][y])
{
xpos[back]=x;
ypos[back]=y;
++back;
}
}
if(!back)
/* no empty spaces */
return;
int idx=rand_range(0,back-1);
ctx->grid[xpos[idx]][ypos[idx]]=rand_2_or_4();
}
/* copies old_grid to ctx->grid */
static void restore_old_grid(void)
{
memcpy(&ctx->grid, &old_grid, sizeof(int)*SPACES);
}
/* checks for a win or loss */
static bool check_gameover(void)
{
int numempty=0;
for(int y=0;y<GRID_SIZE;++y)
{
for(int x=0;x<GRID_SIZE;++x)
{
if(ctx->grid[x][y]==0)
++numempty;
if(ctx->grid[x][y]==WINNING_TILE && !ctx->already_won)
{
/* Let the user see the tile in its full glory... */
draw();
ctx->already_won=true;
rb->splash(HZ*2,"You win!");
const struct text_message prompt={(const char*[]){"Keep going?"}, 1};
enum yesno_res keepgoing=rb->gui_syncyesno_run(&prompt, NULL, NULL);
if(keepgoing==YESNO_NO)
return true;
else
return false;
}
}
}
if(!numempty)
{
/* No empty spaces, check for valid moves */
/* Then, get the current score */
int oldscore=ctx->score;
memset(&merged_grid,0,SPACES*sizeof(bool));
up();
if(memcmp(&old_grid, &ctx->grid, sizeof(int)*SPACES))
{
restore_old_grid();
ctx->score=oldscore;
return false;
}
restore_old_grid();
memset(&merged_grid,0,SPACES*sizeof(bool));
down();
if(memcmp(&old_grid, &ctx->grid, sizeof(int)*SPACES))
{
restore_old_grid();
ctx->score=oldscore;
return false;
}
restore_old_grid();
memset(&merged_grid,0,SPACES*sizeof(bool));
left();
if(memcmp(&old_grid, &ctx->grid, sizeof(int)*SPACES))
{
restore_old_grid();
ctx->score=oldscore;
return false;
}
restore_old_grid();
memset(&merged_grid,0,SPACES*sizeof(bool));
right();
if(memcmp(&old_grid, &ctx->grid, sizeof(int)*SPACES))
{
restore_old_grid();
ctx->score=oldscore;
return false;
}
/* no more legal moves */
ctx->score=oldscore;
draw(); /* Shame the player :) */
rb->splash(HZ*2, "Game Over!");
return true;
}
return false;
}
/* loads highscores from disk */
/* creates an empty structure if the file does not exist */
static void load_hs(void)
{
if(rb->file_exists(HISCORES_FILE))
highscore_load(HISCORES_FILE, highscores, NUM_SCORES);
else
memset(highscores, 0, sizeof(struct highscore)*NUM_SCORES);
}
/* initialize the data structures */
static void init_game(bool newgame)
{
best_score=highscores[0].score;
if(newgame)
{
/* initialize the game context */
memset(ctx->grid, 0, sizeof(int)*SPACES);
for(int i=0;i<NUM_STARTING_TILES;++i)
{
place_random();
}
ctx->score=0;
ctx->already_won=false;
}
/* using the menu resets the font */
/* set it again here */
rb->lcd_setfont(WHAT_FONT);
/* Now calculate font sizes */
/* Now get the height of the font */
rb->font_getstringsize("0123456789", NULL, &max_numeral_height,WHAT_FONT);
max_numeral_height+=VERT_SPACING;
backlight_ignore_timeout();
rb->lcd_clear_display();
draw();
}
/* save the current game state */
static void save_game(void)
{
rb->splash(0, "Saving...");
int fd=rb->open(RESUME_FILE,O_WRONLY|O_CREAT, 0666);
if(fd<0)
{
return;
}
ctx->cksum=0;
for(int x=0;x<GRID_SIZE;++x)
for(int y=0;y<GRID_SIZE;++y)
ctx->cksum+=ctx->grid[x][y];
ctx->cksum^=ctx->score;
rb->write(fd, ctx,sizeof(struct game_ctx_t));
rb->close(fd);
rb->lcd_update();
}
/* loads a saved game, returns true on success */
static bool load_game(void)
{
int success=0;
int fd=rb->open(RESUME_FILE, O_RDONLY);
if(fd<0)
{
rb->remove(RESUME_FILE);
return false;
}
int numread=rb->read(fd, ctx, sizeof(struct game_ctx_t));
int calc=0;
for(int x=0;x<GRID_SIZE;++x)
for(int y=0;y<GRID_SIZE;++y)
calc+=ctx->grid[x][y];
calc^=ctx->score;
if(numread==sizeof(struct game_ctx_t) && calc==ctx->cksum)
++success;
rb->close(fd);
rb->remove(RESUME_FILE);
return (success==1);
}
/* update the highscores with ctx->score */
static void hs_check_update(bool noshow)
{
/* first, find the biggest tile to show as the level */
int biggest=0;
for(int x=0;x<GRID_SIZE;++x)
{
for(int y=0;y<GRID_SIZE;++y)
{
if(ctx->grid[x][y]>biggest)
biggest=ctx->grid[x][y];
}
}
int hs_idx=highscore_update(ctx->score,biggest, "", highscores,NUM_SCORES);
if(!noshow)
{
/* show the scores if there is a new high score */
if(hs_idx>=0)
{
rb->splashf(HZ*2,"New High Score: %d", ctx->score);
rb->lcd_clear_display();
highscore_show(hs_idx,highscores,NUM_SCORES,true);
}
}
highscore_save(HISCORES_FILE,highscores,NUM_SCORES);
}
/* asks the user if they wish to quit */
static bool confirm_quit(void)
{
const struct text_message prompt={(const char*[]){"Are you sure?", "This will clear your current game."}, 2};
enum yesno_res response=rb->gui_syncyesno_run(&prompt, NULL, NULL);
if(response==YESNO_NO)
return false;
else
return true;
}
/* show the pause menu */
static int do_2048_pause_menu(void)
{
int sel=0;
MENUITEM_STRINGLIST(menu,"2048 Menu", NULL,
"Resume Game",
"Start New Game",
"High Scores",
"Playback Control",
"Help",
"Quit without Saving",
"Quit");
bool quit=false;
while(!quit)
{
switch(rb->do_menu(&menu, &sel, NULL, false))
{
case 0:
draw();
return 0;
case 1:
{
if(!confirm_quit())
break;
else
{
hs_check_update(false);
return 1;
}
}
case 2:
highscore_show(-1,highscores, NUM_SCORES, true);
break;
case 3:
playback_control(NULL);
break;
case 4:
do_help();
break;
case 5: /* quit w/o saving */
{
if(!confirm_quit())
break;
else
{
return 2;
}
}
case 6:
return 3;
}
}
return 0;
}
static void exit_handler(void)
{
cleanup();
if(abnormal_exit)
save_game();
return;
}
static bool check_hs;
/* main game loop */
static enum plugin_status do_game(bool newgame)
{
init_game(newgame);
rb_atexit(&exit_handler);
int made_move=0;
while(1)
{
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(false); /* Save battery when idling */
#endif
/* Wait for a button press */
int button=pluginlib_getaction(-1, plugin_contexts, ARRAYLEN(plugin_contexts));
made_move=0;
memset(&merged_grid,0,SPACES*sizeof(bool));
memcpy(&old_grid, &ctx->grid, sizeof(int)*SPACES);
int grid_before_anim_step[GRID_SIZE][GRID_SIZE];
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(true); /* doing work now... */
#endif
switch(button)
{
case KEY_UP:
for(int i=0;i<GRID_SIZE-1;++i)
{
memcpy(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES);
up();
if(memcmp(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES))
{
rb->sleep(ANIM_SLEEPTIME);
draw();
}
}
made_move=1;
break;
case KEY_DOWN:
for(int i=0;i<GRID_SIZE-1;++i)
{
memcpy(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES);
down();
if(memcmp(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES))
{
rb->sleep(ANIM_SLEEPTIME);
draw();
}
}
made_move=1;
break;
case KEY_LEFT:
for(int i=0;i<GRID_SIZE-1;++i)
{
memcpy(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES);
left();
if(memcmp(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES))
{
rb->sleep(ANIM_SLEEPTIME);
draw();
}
}
made_move=1;
break;
case KEY_RIGHT:
for(int i=0;i<GRID_SIZE-1;++i)
{
memcpy(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES);
right();
if(memcmp(grid_before_anim_step, ctx->grid, sizeof(int)*SPACES))
{
rb->sleep(ANIM_SLEEPTIME);
draw();
}
}
made_move=1;
break;
case KEY_EXIT:
switch(do_2048_pause_menu())
{
case 0: /* resume */
break;
case 1: /* new game */
init_game(true);
made_move=1;
continue;
break;
case 2: /* quit without saving */
check_hs=true;
rb->remove(RESUME_FILE);
return PLUGIN_ERROR;
case 3: /* save and quit */
check_hs=false;
save_game();
return PLUGIN_ERROR;
}
break;
default:
{
exit_on_usb(button); /* handles poweroff and USB events */
break;
}
}
if(made_move)
{
/* Check if we actually moved, then add random */
if(memcmp(&old_grid, ctx->grid, sizeof(int)*SPACES))
{
place_random();
}
memcpy(&old_grid, ctx->grid, sizeof(int)*SPACES);
if(check_gameover())
return PLUGIN_OK;
draw();
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(false); /* back to idle */
#endif
rb->yield();
}
}
/* decide if this_item should be shown in the main menu */
/* used to hide resume option when there is no save */
static int mainmenu_cb(int action, const struct menu_item_ex *this_item)
{
int idx=((intptr_t)this_item);
if(action==ACTION_REQUEST_MENUITEM && !loaded && (idx==0 || idx==5))
return ACTION_EXIT_MENUITEM;
return action;
}
/* show the main menu */
static enum plugin_status do_2048_menu(void)
{
int sel=0;
loaded=load_game();
MENUITEM_STRINGLIST(menu,"2048 Menu", mainmenu_cb, "Resume Game", "Start New Game","High Scores","Playback Control", "Help", "Quit without Saving", "Quit");
bool quit=false;
while(!quit)
{
int item;
switch(item=rb->do_menu(&menu,&sel,NULL,false))
{
case 0: /* Start new game or resume a game */
case 1:
{
if(item==1 && loaded)
{
if(!confirm_quit())
break;
}
enum plugin_status ret=do_game(item==1);
switch(ret)
{
case PLUGIN_OK:
{
loaded=false;
rb->remove(RESUME_FILE);
hs_check_update(false);
break;
}
case PLUGIN_USB_CONNECTED:
save_game();
/* Don't bother showing the high scores... */
return ret;
case PLUGIN_ERROR: /* exit without menu */
if(check_hs)
hs_check_update(false);
return PLUGIN_OK;
default:
break;
}
break;
}
case 2:
highscore_show(-1,highscores, NUM_SCORES, true);
break;
case 3:
playback_control(NULL);
break;
case 4:
do_help();
break;
case 5:
if(confirm_quit())
return PLUGIN_OK;
case 6:
if(loaded)
save_game();
return PLUGIN_OK;
default:
break;
}
}
return PLUGIN_OK;
}
enum plugin_status plugin_start(const void* param)
{
(void)param;
rb->srand(*rb->current_tick);
load_hs();
rb->lcd_setfont(WHAT_FONT);
/* now start the game menu */
enum plugin_status ret=do_2048_menu();
highscore_save(HISCORES_FILE,highscores,NUM_SCORES);
cleanup();
abnormal_exit=false;
return ret;
}
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