/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2006 Miguel A. Arévalo * Color graphics from eboard * GNUChess v2 chess engine Copyright (c) 1988 John Stanback * * 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. * ****************************************************************************/ #include "plugin.h" #if (MEMORYSIZE > 8) /* Lowmem doesn't have playback in chessbox */ #define HAVE_PLAYBACK_CONTROL #endif #ifdef HAVE_PLAYBACK_CONTROL #include "lib/playback_control.h" #endif #include "gnuchess.h" #include "opening.h" #include "chessbox_pgn.h" /* type definitions */ struct cb_command { int type; char mv_s[5]; unsigned short mv; }; /* External bitmaps */ extern const fb_data chessbox_pieces[]; /* Tile size defined by the assigned bitmap */ #include "pluginbitmaps/chessbox_pieces.h" #define TILE_WIDTH BMPWIDTH_chessbox_pieces #define TILE_HEIGHT (BMPHEIGHT_chessbox_pieces/26) /* Calculate Offsets */ #define XOFS ((LCD_WIDTH-8*TILE_WIDTH)/2) #define YOFS ((LCD_HEIGHT-8*TILE_HEIGHT)/2) /* save files */ #define SAVE_FILE PLUGIN_GAMES_DATA_DIR "/chessbox.save" /* commands enum */ #define COMMAND_NOP 0 #define COMMAND_MOVE 1 #define COMMAND_PLAY 2 #define COMMAND_LEVEL 3 #define COMMAND_RESTART 4 #define COMMAND_QUIT 5 #define COMMAND_MENU 6 #define COMMAND_SAVE 7 #define COMMAND_RESTORE 8 #define COMMAND_RESUME 9 #define COMMAND_SELECT 10 #define COMMAND_NEXT 11 #define COMMAND_PREV 12 short plugin_mode; /* level+1's string */ const char *level_string[] = { "Level 1: 60 moves / 5 min" , "Level 2: 60 moves / 15 min" , "Level 3: 60 moves / 30 min" , "Level 4: 40 moves / 30 min" , "Level 5: 40 moves / 60 min" , "Level 6: 40 moves / 120 min" , "Level 7: 40 moves / 240 min" , "Level 8: 1 move / 15 min" , "Level 9: 1 move / 60 min" , "Level 10: 1 move / 600 min" }; /* "While thinking" command */ int wt_command = COMMAND_NOP; /* ---- Get the board column and row (e2 f.e.) for a physical x y ---- */ static void xy2cr ( short x, short y, short *c, short *r ) { if (computer == black ) { *c = x ; *r = y ; } else { *c = 7 - x ; *r = 7 - y ; } } /* ---- get physical x y for a board column and row (e2 f.e.) ---- */ static void cr2xy ( short c, short r, short *x, short *y ) { if ( computer == black ) { *x = c ; *y = r ; } else { *x = 7 - c ; *y = 7 - r ; } } /* ---- Draw a complete board ---- */ static void cb_drawboard (void) { short r , c , x , y ; short l , piece , p_color ; int b_color=1; rb->lcd_clear_display(); for (r = 0; r < 8; r++) { for (c = 0; c < 8; c++) { l = locn[r][c]; piece = board[l] ; p_color = color[l] ; cr2xy ( c , r , &x , &y ); if ( piece == no_piece ) { rb->lcd_bitmap_part ( chessbox_pieces , 0 , TILE_HEIGHT * b_color , STRIDE( SCREEN_MAIN, BMPWIDTH_chessbox_pieces, BMPHEIGHT_chessbox_pieces) , XOFS + x*TILE_WIDTH , YOFS + ( 7 - y )*TILE_HEIGHT , TILE_WIDTH , TILE_HEIGHT ); } else { rb->lcd_bitmap_part ( chessbox_pieces , 0 , 2 * TILE_HEIGHT + 4 * TILE_HEIGHT * ( piece - 1 ) + 2 * TILE_HEIGHT * p_color + TILE_HEIGHT * b_color , STRIDE( SCREEN_MAIN, BMPWIDTH_chessbox_pieces, BMPHEIGHT_chessbox_pieces) , XOFS + x*TILE_WIDTH , YOFS + (7 - y)*TILE_HEIGHT , TILE_WIDTH , TILE_HEIGHT ); } b_color = (b_color == 1) ? 0 : 1 ; } b_color = (b_color == 1) ? 0 : 1 ; } /* draw board limits */ #if (LCD_WIDTH > TILE_WIDTH*8) && (LCD_HEIGHT > TILE_HEIGHT*8) rb->lcd_drawrect(XOFS - 1, YOFS - 1, TILE_WIDTH*8 + 2, TILE_HEIGHT*8 + 2); #elif LCD_WIDTH > TILE_WIDTH*8 rb->lcd_vline(XOFS - 1, 0, LCD_HEIGHT - 1); rb->lcd_vline(XOFS + 8*TILE_WIDTH, 0, LCD_HEIGHT - 1); #elif LCD_HEIGHT > TILE_HEIGHT*8 rb->lcd_hline(0, LCD_WIDTH - 1, YOFS - 1); rb->lcd_hline(0, LCD_WIDTH - 1, YOFS + TILE_HEIGHT*8); #endif rb->lcd_update(); } /* ---- Switch mark on board ---- */ static void cb_switch ( short x , short y ) { rb->lcd_set_drawmode ( DRMODE_COMPLEMENT ); rb->lcd_drawrect ( XOFS + x*TILE_WIDTH + 1 , YOFS + ( 7 - y )*TILE_HEIGHT +1 , TILE_WIDTH-2 , TILE_HEIGHT-2 ); rb->lcd_update(); rb->lcd_set_drawmode ( DRMODE_SOLID ); } /* ---- callback for capturing interaction while thinking ---- */ static void cb_wt_callback ( void ) { int button = BUTTON_NONE; wt_command = COMMAND_NOP; button = rb->button_get(false); switch (button) { #ifdef CB_RC_QUIT case CB_RC_QUIT: wt_command = COMMAND_QUIT; timeout = true; break; #endif case CB_MENU: wt_command = COMMAND_MENU; timeout = true; break; case CB_PLAY: wt_command = COMMAND_PLAY; timeout = true; break; } } /* ---- set playing parameters depending on level ---- */ static void cb_setlevel ( int lev ) { Level = (lev > 7) ? 7 : ( (lev < 1) ? 1 : lev ) ; switch (Level) { case 1 : TCmoves = 60; TCminutes = 5; break; case 2 : TCmoves = 60; TCminutes = 15; break; case 3 : TCmoves = 60; TCminutes = 30; break; case 4 : TCmoves = 40; TCminutes = 30; break; case 5 : TCmoves = 40; TCminutes = 60; break; case 6 : TCmoves = 40; TCminutes = 120; break; case 7 : TCmoves = 40; TCminutes = 240; break; case 8 : TCmoves = 1; TCminutes = 15; break; case 9 : TCmoves = 1; TCminutes = 60; break; case 10 : TCmoves = 1; TCminutes = 600; break; } TCflag = (TCmoves > 1); SetTimeControl(); } /* ---- increase playing level ---- */ static void cb_levelup ( void ) { if ( Level == 7 ) cb_setlevel ( 1 ); else cb_setlevel ( Level+1 ); rb->splash ( HZ/2 , level_string[Level-1] ); }; /* ---- Save current position ---- */ static void cb_saveposition ( void ) { int fd; short sq,i,c; unsigned short temp; rb->splash ( 0 , "Saving position" ); fd = rb->open(SAVE_FILE, O_WRONLY|O_CREAT, 0666); computer++; rb->write(fd, &(computer), sizeof(computer)); computer--; opponent++; rb->write(fd, &(opponent), sizeof(opponent)); opponent--; rb->write(fd, &(Game50), sizeof(Game50)); rb->write(fd, &(castld[white]), sizeof(castld[white])); rb->write(fd, &(castld[black]), sizeof(castld[black])); rb->write(fd, &(kingmoved[white]), sizeof(kingmoved[white])); rb->write(fd, &(kingmoved[black]), sizeof(kingmoved[black])); rb->write(fd, &(withbook), sizeof(withbook)); rb->write(fd, &(Level), sizeof(Level)); rb->write(fd, &(TCflag), sizeof(TCflag)); rb->write(fd, &(OperatorTime), sizeof(OperatorTime)); rb->write(fd, &(TimeControl.clock[white]), sizeof(TimeControl.clock[white]) ); rb->write(fd, &(TimeControl.clock[black]), sizeof(TimeControl.clock[black]) ); rb->write(fd, &(TimeControl.moves[white]), sizeof(TimeControl.moves[white]) ); rb->write(fd, &(TimeControl.moves[black]), sizeof(TimeControl.moves[black]) ); for (sq = 0; sq < 64; sq++) { if (color[sq] == neutral) c = 0; else c = color[sq]+1; temp = 256*board[sq] + c ; rb->write(fd, &(temp), sizeof(temp)); } for (i = 0; i <= GameCnt; i++) { if (GameList[i].color == neutral) c = 0; else c = GameList[i].color + 1; rb->write(fd, &(GameList[i].gmove), sizeof(GameList[i].gmove)); rb->write(fd, &(GameList[i].score), sizeof(GameList[i].score)); rb->write(fd, &(GameList[i].depth), sizeof(GameList[i].depth)); rb->write(fd, &(GameList[i].nodes), sizeof(GameList[i].nodes)); rb->write(fd, &(GameList[i].time), sizeof(GameList[i].time)); rb->write(fd, &(GameList[i].piece), sizeof(GameList[i].piece)); rb->write(fd, &(c), sizeof(c)); } rb->close(fd); } /* ---- Restore saved position ---- */ static void cb_restoreposition ( void ) { int fd; short sq; unsigned short m; if ( (fd = rb->open(SAVE_FILE, O_RDONLY)) >= 0 ) { rb->splash ( 0 , "Loading position" ); rb->read(fd, &(computer), sizeof(computer)); rb->read(fd, &(opponent), sizeof(opponent)); rb->read(fd, &(Game50), sizeof(Game50)); rb->read(fd, &(castld[white]), sizeof(castld[white])); rb->read(fd, &(castld[black]), sizeof(castld[black])); rb->read(fd, &(kingmoved[white]), sizeof(kingmoved[white])); rb->read(fd, &(kingmoved[black]), sizeof(kingmoved[black])); rb->read(fd, &(withbook), sizeof(withbook)); rb->read(fd, &(Level), sizeof(Level)); rb->read(fd, &(TCflag), sizeof(TCflag)); rb->read(fd, &(OperatorTime), sizeof(OperatorTime)); rb->read(fd, &(TimeControl.clock[white]), sizeof(TimeControl.clock[white])); rb->read(fd, &(TimeControl.clock[black]), sizeof(TimeControl.clock[black])); rb->read(fd, &(TimeControl.moves[white]), sizeof(TimeControl.moves[white])); rb->read(fd, &(TimeControl.moves[black]), sizeof(TimeControl.moves[black])); for (sq = 0; sq < 64; sq++) { rb->read(fd, &(m), sizeof(m)); board[sq] = (m >> 8); color[sq] = (m & 0xFF); if (color[sq] == 0) color[sq] = neutral; else --color[sq]; } GameCnt = -1; while (rb->read(fd, &(GameList[++GameCnt].gmove), sizeof(GameList[GameCnt].gmove)) > 0) { rb->read(fd, &(GameList[GameCnt].score), sizeof(GameList[GameCnt].score)); rb->read(fd, &(GameList[GameCnt].depth), sizeof(GameList[GameCnt].depth)); rb->read(fd, &(GameList[GameCnt].nodes), sizeof(GameList[GameCnt].nodes)); rb->read(fd, &(GameList[GameCnt].time), sizeof(GameList[GameCnt].time)); rb->read(fd, &(GameList[GameCnt].piece), sizeof(GameList[GameCnt].piece)); rb->read(fd, &(GameList[GameCnt].color), sizeof(GameList[GameCnt].color)); if (GameList[GameCnt].color == 0) GameList[GameCnt].color = neutral; else --GameList[GameCnt].color; } GameCnt--; if (TimeControl.clock[white] > 0) TCflag = true; computer--; opponent--; } rb->close(fd); cb_setlevel(Level); InitializeStats(); Sdepth = 0; } /* ---- show menu in viewer mode---- */ static int cb_menu_viewer(void) { int selection; int result = 0; bool menu_quit = false; MENUITEM_STRINGLIST(menu,"Chessbox Menu",NULL,"Restart Game", "Select Other Game", "Quit"); while(!menu_quit) { switch(rb->do_menu(&menu, &selection, NULL, false)) { case 0: menu_quit = true; result = COMMAND_RESTART; break; case 1: result = COMMAND_SELECT; menu_quit = true; break; case 2: result = COMMAND_QUIT; menu_quit = true; break; } } return result; } /* ---- get a command in game mode ---- */ static struct cb_command cb_get_viewer_command (void) { int button; struct cb_command result = { 0, {0,0,0,0,0}, 0 }; /* main loop */ while ( true ) { button = rb->button_get(true); switch (button) { #ifdef CB_RC_QUIT case CB_RC_QUIT: result.type = COMMAND_QUIT; return result; #endif case CB_MENU: result.type = cb_menu_viewer(); return result; case CB_LEFT: result.type = COMMAND_PREV; return result; case CB_RIGHT: result.type = COMMAND_NEXT; return result; } } } /* ---- viewer main loop ---- */ static void cb_start_viewer(char* filename){ struct pgn_game_node *first_game, *selected_game; struct pgn_ply_node *curr_ply; bool exit_game = false; bool exit_viewer = false; struct cb_command command; first_game = pgn_list_games(filename); if (first_game == NULL){ rb->splash ( HZ*2 , "No games found !" ); return; } do { selected_game = pgn_show_game_list(first_game); if (selected_game == NULL){ break; } pgn_parse_game(filename, selected_game); if (selected_game->first_ply != NULL) { /* init board */ GNUChess_Initialize(); /* draw the board */ cb_drawboard(); curr_ply = selected_game->first_ply; exit_game = false; do { command = cb_get_viewer_command (); switch (command.type) { case COMMAND_PREV: /* unapply the previous ply */ if (curr_ply->prev_node != NULL){ curr_ply = curr_ply->prev_node; } else { rb->splash ( HZ*2 , "At the begining of the game" ); break; } board[locn[curr_ply->row_from][curr_ply->column_from]] = board[locn[curr_ply->row_to][curr_ply->column_to]]; color[locn[curr_ply->row_from][curr_ply->column_from]] = color[locn[curr_ply->row_to][curr_ply->column_to]]; board[locn[curr_ply->row_to][curr_ply->column_to]] = no_piece; color[locn[curr_ply->row_to][curr_ply->column_to]] = neutral; if (curr_ply->taken_piece != no_piece && !curr_ply->enpassant){ board[locn[curr_ply->row_to][curr_ply->column_to]] = curr_ply->taken_piece; color[locn[curr_ply->row_to][curr_ply->column_to]] = ((curr_ply->player==white)?black:white); } if (curr_ply->castle){ if (curr_ply->column_to == 6){ /* castling kingside */ board[locn[curr_ply->row_to][7]] = rook; color[locn[curr_ply->row_to][7]] = curr_ply->player; board[locn[curr_ply->row_to][5]] = no_piece; color[locn[curr_ply->row_to][5]] = neutral; } else { /* castling queenside */ board[locn[curr_ply->row_to][0]] = rook; color[locn[curr_ply->row_to][0]] = curr_ply->player; board[locn[curr_ply->row_to][3]] = no_piece; color[locn[curr_ply->row_to][3]] = neutral; } } if (curr_ply->enpassant){ board[locn[curr_ply->row_from][curr_ply->column_to]] = pawn; color[locn[curr_ply->row_from][curr_ply->column_to]] = ((curr_ply->player==white)?black:white); } if (curr_ply->promotion){ board[locn[curr_ply->row_from][curr_ply->column_from]] = pawn; color[locn[curr_ply->row_from][curr_ply->column_from]] = curr_ply->player; } cb_drawboard(); break; case COMMAND_NEXT: /* apply the current move */ if (curr_ply->player == neutral){ rb->splash ( HZ*2 , "At the end of the game" ); break; } board[locn[curr_ply->row_to][curr_ply->column_to]] = board[locn[curr_ply->row_from][curr_ply->column_from]]; color[locn[curr_ply->row_to][curr_ply->column_to]] = color[locn[curr_ply->row_from][curr_ply->column_from]]; board[locn[curr_ply->row_from][curr_ply->column_from]] = no_piece; color[locn[curr_ply->row_from][curr_ply->column_from]] = neutral; if (curr_ply->castle){ if (curr_ply->column_to == 6){ /* castling kingside */ board[locn[curr_ply->row_to][5]] = rook; color[locn[curr_ply->row_to][5]] = curr_ply->player; board[locn[curr_ply->row_to][7]] = no_piece; color[locn[curr_ply->row_to][7]] = neutral; } else { /* castling queenside */ board[locn[curr_ply->row_to][3]] = rook; color[locn[curr_ply->row_to][3]] = curr_ply->player; board[locn[curr_ply->row_to][0]] = no_piece; color[locn[curr_ply->row_to][0]] = neutral; } } if (curr_ply->enpassant){ board[locn[curr_ply->row_from][curr_ply->column_to]] = no_piece; color[locn[curr_ply->row_from][curr_ply->column_to]] = neutral; } if (curr_ply->promotion){ board[locn[curr_ply->row_to][curr_ply->column_to]] = curr_ply->promotion_piece; color[locn[curr_ply->row_to][curr_ply->column_to]] = curr_ply->player; } if (curr_ply->next_node != NULL){ curr_ply = curr_ply->next_node; } cb_drawboard(); break; case COMMAND_RESTART: GNUChess_Initialize(); cb_drawboard(); curr_ply = selected_game->first_ply; case COMMAND_SELECT: exit_game = true; break; case COMMAND_QUIT: exit_viewer = true; break; } } while (!exit_game && !exit_viewer); } else { rb->splash ( HZ*2 , "Error parsing game !"); } } while (!exit_viewer); } /* ---- show menu ---- */ static int cb_menu(void) { int selection; int result = 0; bool menu_quit = false; MENUITEM_STRINGLIST(menu,"Chessbox Menu",NULL,"New Game","Resume Game", "Save Game", "Restore Game", #ifdef HAVE_PLAYBACK_CONTROL "Playback Control", #endif "Quit"); while(!menu_quit) { switch(rb->do_menu(&menu, &selection, NULL, false)) { case 0: menu_quit = true; result = COMMAND_RESTART; break; case 1: result = COMMAND_RESUME; menu_quit = true; break; case 2: result = COMMAND_SAVE; menu_quit = true; break; case 3: result = COMMAND_RESTORE; menu_quit = true; break; case 4: #ifdef HAVE_PLAYBACK_CONTROL playback_control(NULL); break; case 5: #endif result = COMMAND_QUIT; menu_quit = true; break; } } return result; } /* ---- get a command in game mode ---- */ static struct cb_command cb_getcommand (void) { static short x = 4 , y = 3 ; short c , r , l; int button; #if defined(CB_PLAY_PRE) || defined(CB_SELECT_PRE) int lastbutton = BUTTON_NONE; #endif int marked = false , from_marked = false ; short marked_x = 0 , marked_y = 0 ; struct cb_command result = { 0, {0,0,0,0,0}, 0 }; cb_switch ( x , y ); /* main loop */ while ( true ) { button = rb->button_get(true); switch (button) { #ifdef CB_RC_QUIT case CB_RC_QUIT: result.type = COMMAND_QUIT; return result; #endif case CB_MENU: result.type = cb_menu(); return result; case CB_LEVEL: result.type = COMMAND_LEVEL; return result; case CB_PLAY: #ifdef CB_PLAY_PRE if (lastbutton != CB_PLAY_PRE) break; #endif result.type = COMMAND_PLAY; return result; case CB_UP: if ( !from_marked ) cb_switch ( x , y ); y++; if ( y == 8 ) { y = 0; x--; if ( x < 0 ) x = 7; } if ( marked && ( marked_x == x ) && ( marked_y == y ) ) { from_marked = true ; } else { from_marked = false ; cb_switch ( x , y ); } break; case CB_DOWN: if ( !from_marked ) cb_switch ( x , y ); y--; if ( y < 0 ) { y = 7; x++; if ( x == 8 ) x = 0; } if ( marked && ( marked_x == x ) && ( marked_y == y ) ) { from_marked = true ; } else { from_marked = false ; cb_switch ( x , y ); } break; case CB_LEFT: if ( !from_marked ) cb_switch ( x , y ); x--; if ( x < 0 ) { x = 7; y++; if ( y == 8 ) y = 0; } if ( marked && ( marked_x == x ) && ( marked_y == y ) ) { from_marked = true ; } else { from_marked = false ; cb_switch ( x , y ); } break; case CB_RIGHT: if ( !from_marked ) cb_switch ( x , y ); x++; if ( x == 8 ) { x = 0; y--; if ( y < 0 ) y = 7; } if ( marked && ( marked_x == x ) && ( marked_y == y ) ) { from_marked = true ; } else { from_marked = false ; cb_switch ( x , y ); } break; case CB_SELECT: #ifdef CB_SELECT_PRE if (lastbutton != CB_SELECT_PRE) break; #endif if ( !marked ) { xy2cr ( x , y , &c , &r ); l = locn[r][c]; if ( ( color[l]!=computer ) && ( board[l]!=no_piece ) ) { marked = true; from_marked = true ; marked_x = x; marked_y = y; } } else { if ( ( marked_x == x ) && ( marked_y == y ) ) { marked = false; from_marked = false; } else { xy2cr ( marked_x , marked_y , &c , &r ); result.mv_s[0] = 'a' + c; result.mv_s[1] = '1' + r; xy2cr ( x , y , &c , &r ); result.mv_s[2] = 'a' + c; result.mv_s[3] = '1' + r; result.mv_s[4] = '\00'; result.type = COMMAND_MOVE; return result; } } break; } #if defined(CB_PLAY_PRE) || defined(CB_SELECT_PRE) if (button != BUTTON_NONE) lastbutton = button; #endif } } /* ---- game main loop ---- */ static void cb_play_game(void) { struct cb_command command; struct pgn_game_node *game; char move_buffer[20]; /* init status */ bool exit = false; /* load opening book, soon */ /* init board */ GNUChess_Initialize(); /* init PGN history data structures */ game = pgn_init_game(); /* restore saved position, if saved */ cb_restoreposition(); /* TODO: save/restore the PGN history of unfinished games */ /* draw the board */ /* I don't like configscreens, start game inmediatly */ cb_drawboard(); while (!exit) { if ( mate ) { rb->splash ( HZ*3 , "Checkmate!" ); rb->button_get(true); pgn_store_game(game); GNUChess_Initialize(); game = pgn_init_game(); cb_drawboard(); } command = cb_getcommand (); switch (command.type) { case COMMAND_MOVE: if ( ! VerifyMove (opponent, command.mv_s , 0 , &command.mv, move_buffer ) ) { rb->splash ( HZ/2 , "Illegal move!" ); cb_drawboard(); } else { cb_drawboard(); /* Add the ply to the PGN history (in algebraic notation) */ pgn_append_ply(game, opponent, move_buffer, mate); rb->splash ( 0 , "Thinking..." ); #ifdef HAVE_ADJUSTABLE_CPU_FREQ rb->cpu_boost ( true ); #endif SelectMove ( computer , 0 , cb_wt_callback, move_buffer); #ifdef HAVE_ADJUSTABLE_CPU_FREQ rb->cpu_boost ( false ); #endif /* Add the ply to the PGN history (in algebraic notation) and check * for the result of the game which is only calculated in SelectMove */ if (move_buffer[0] != '\0'){ pgn_append_ply(game, computer, move_buffer, mate); } else { pgn_set_result(game, mate); } if ( wt_command == COMMAND_QUIT ) { exit = true; break; } cb_drawboard(); } break; #ifdef COMMAND_RESTART case COMMAND_RESTART: GNUChess_Initialize(); game = pgn_init_game(); cb_drawboard(); break; #endif case COMMAND_RESUME: cb_drawboard(); break; case COMMAND_SAVE: cb_saveposition(); cb_drawboard(); break; case COMMAND_RESTORE: /* watch out, it will reset the game if no previous game was saved! */ /* init board */ GNUChess_Initialize(); /* init PGN history data structures */ game = pgn_init_game(); /* restore saved position, if saved */ cb_restoreposition(); cb_drawboard(); break; case COMMAND_PLAY: if (opponent == white) { opponent = black; computer = white; } else { opponent = white; computer = black; } rb->splash ( 0 , "Thinking..." ); ElapsedTime(1); #ifdef HAVE_ADJUSTABLE_CPU_FREQ rb->cpu_boost ( true ); #endif SelectMove ( computer , 0 , cb_wt_callback , move_buffer ); #ifdef HAVE_ADJUSTABLE_CPU_FREQ rb->cpu_boost ( false ); #endif /* Add the ply to the PGN history (in algebraic notation) and check * for the result of the game which is only calculated in SelectMove */ if (move_buffer[0] != '\0'){ pgn_append_ply(game, computer, move_buffer, mate); } else { pgn_set_result(game, mate); } if ( wt_command == COMMAND_QUIT ) { exit = true; break; } cb_drawboard(); break; case COMMAND_LEVEL: cb_levelup ( ); cb_drawboard(); break; case COMMAND_QUIT: exit = true; break; } } cb_saveposition(); /* TODO: save/restore the PGN history of unfinished games */ rb->lcd_setfont(FONT_UI); } /***************************************************************************** * plugin entry point. ******************************************************************************/ enum plugin_status plugin_start(const void* parameter) { /* plugin init */ #if LCD_DEPTH > 1 rb->lcd_set_backdrop(NULL); #endif /* end of plugin init */ /* if the plugin was invoked as a viewer, parse the file and show the game list * else, start playing a game */ if (parameter != NULL) { cb_start_viewer((char *)parameter); } else { cb_play_game(); } return PLUGIN_OK; }