1/* This file is part of OpenBubbles. 2 * 3 * OpenBubbles is an SDL clone of Bubbles. 4 * Copyright (C) 2004 Benny Sperisen 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 * 20 * main.cpp contains main(). 21 * 22 * Written by: 23 * Benny Sperisen 24 * lasindi@gmail.com 25 * www.freewebs.com/lasindi 26 *****************************************************************************/ 27 28#include "SDL.h" 29#include "SDL_gfxPrimitives.h" 30#include "SDL_image.h" 31#include <iostream> 32#include <string.h> 33#include <string> 34#include <fstream> 35using namespace std; 36 37#include "screen.h" 38#include "gameloop.h" 39#include "button.h" 40#include "highscores.h" 41#include "BFont.h" 42#include "audioplayer.h" 43 44#define BUTTONS_START 180 45#define BUTTONS_SPACING 45 46 47// Used for pulsing the cursor on the high score entry. 48#define CURSOR_PULSE_RATE 20 49#define UP 1 50#define DOWN 0 51 52// The rate at which the logo animation proceeds. 53#define ANIMATION_RATE 5 54 55#define ANIMATION_WIDTH 80 56#define ANIMATION_HEIGHT 80 57 58enum SCREENS {MENU,INSTRUCTIONS,GAME,HIGHSCORE}; 59enum ANIMATION_IMAGES {PI_ABUBBLE,ABUBBLE_VERSION,VERSION_ABUBBLE,ABUBBLE_PI}; 60 61/* The code in initButtons is called twice, so to save space, it's in a 62 * separate function. */ 63void initButtons(); 64 65// Transitions to screen 'to' (from the SCREENS enumeration). 66void transition(char to); 67 68SDL_Surface* boxChecked; 69SDL_Surface* boxUnchecked; 70 71int main() 72{ 73 SDL_Surface* icon; 74 SDL_Surface* logo; 75 SDL_Surface* visit; 76 SDL_Surface* copyright; 77 SDL_Surface* instructions; 78 SDL_Surface* enterback; 79 SDL_Surface* highbanner; 80 SDL_Surface* cursor; 81 SDL_Surface* abubble; 82 SDL_Surface* pi; 83 SDL_Surface* version; 84 SDL_Surface* labels; 85 SDL_Surface* from; 86 SDL_Surface* to; 87 SDL_Rect src,dest; 88 SDL_Event event; 89 BFont_Info* font; 90 char* result; 91 char* temp=new char[MAX_CHARACTERS+1]; 92 char cursor_direction,currentimage; 93 double score; 94 int time1,time2,diff_time,pause_time,cursor_pos,cursor_alpha,totalwidth, 95 from_alpha,to_alpha; 96 string datadir2,datadir3,name; 97 soundOn=fadingOn=true; 98 if(SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO)!=0) 99 { 100 cerr<<"ERROR: unable to initialize SDL: "<<SDL_GetError()<<endl; 101 return 1; 102 } 103 atexit(SDL_Quit); 104 atexit(SDL_CloseAudio); 105 atexit(saveEverything); 106 screen=SDL_SetVideoMode(SCREEN_WIDTH,SCREEN_HEIGHT,32,SDL_HWSURFACE); 107 if(screen==NULL) 108 { 109 cerr<<"ERROR: unable to set video mode: "<<SDL_GetError()<<endl; 110 return 1; 111 } 112 loadHighScores(); 113 audio=new audioPlayer; 114 // Load the sounds. 115 datadir=DATA_PREFIX; 116 datadir+="/bubble.wav"; 117 bubbleSound=audio->loadSound(datadir); 118 datadir=DATA_PREFIX; 119 datadir+="/fire.wav"; 120 missleSound=audio->loadSound(datadir); 121 datadir=DATA_PREFIX; 122 datadir+="/gameover.wav"; 123 gameoverSound=audio->loadSound(datadir); 124 datadir=DATA_PREFIX; 125 datadir+="/bounce.wav"; 126 bounceSound=audio->loadSound(datadir); 127 loadSettings(); // Load fadingOn and soundOn. 128 // Load all of the surfaces used in main(). 129 datadir=DATA_PREFIX; 130 datadir+="/icon.xpm"; 131 icon=IMG_Load(datadir.c_str()); 132 if(icon==NULL) 133 { 134 cerr<<"ERROR: unable to load icon.\n"; 135 exit(1); 136 } 137 SDL_WM_SetIcon(icon,NULL); 138 datadir=DATA_PREFIX; 139 datadir+="/logo.png"; 140 logo=IMG_Load(datadir.c_str()); 141 if(logo==NULL) 142 { 143 cerr<<"ERROR: unable to load logo.\n"; 144 exit(1); 145 } 146 datadir=DATA_PREFIX; 147 datadir+="/visit.png"; 148 visit=IMG_Load(datadir.c_str()); 149 if(visit==NULL) 150 { 151 cerr<<"ERROR: unable to load visit.\n"; 152 exit(1); 153 } 154 datadir=DATA_PREFIX; 155 datadir+="/copyright.png"; 156 copyright=IMG_Load(datadir.c_str()); 157 if(copyright==NULL) 158 { 159 cerr<<"ERROR: unable to load copyright.\n"; 160 exit(1); 161 } 162 datadir=DATA_PREFIX; 163 datadir+="/instructions.png"; 164 instructions=IMG_Load(datadir.c_str()); 165 if(instructions==NULL) 166 { 167 cerr<<"ERROR: unable to load instructions.\n"; 168 exit(1); 169 } 170 datadir=DATA_PREFIX; 171 datadir+="/enterback.png"; 172 enterback=IMG_Load(datadir.c_str()); 173 if(enterback==NULL) 174 { 175 cerr<<"ERROR: unable to load enterback.\n"; 176 exit(1); 177 } 178 datadir=DATA_PREFIX; 179 datadir+="/highbanner.png"; 180 highbanner=IMG_Load(datadir.c_str()); 181 if(highbanner==NULL) 182 { 183 cerr<<"ERROR: unable to load highbanner.\n"; 184 exit(1); 185 } 186 datadir=DATA_PREFIX; 187 datadir+="/cursor.png"; 188 cursor=IMG_Load(datadir.c_str()); 189 if(cursor==NULL) 190 { 191 cerr<<"ERROR: unable to load cursor.\n"; 192 exit(1); 193 } 194 datadir=DATA_PREFIX; 195 datadir+="/pi.png"; 196 pi=IMG_Load(datadir.c_str()); 197 if(pi==NULL) 198 { 199 cerr<<"ERROR: unable to load pi.\n"; 200 exit(1); 201 } 202 datadir=DATA_PREFIX; 203 datadir+="/version.png"; 204 version=IMG_Load(datadir.c_str()); 205 if(version==NULL) 206 { 207 cerr<<"ERROR: unable to load version.\n"; 208 exit(1); 209 } 210 datadir=DATA_PREFIX; 211 datadir+="/abubble.png"; 212 abubble=IMG_Load(datadir.c_str()); 213 if(abubble==NULL) 214 { 215 cerr<<"ERROR: unable to load abubble.\n"; 216 exit(1); 217 } 218 datadir=DATA_PREFIX; 219 datadir+="/labels.png"; 220 labels=IMG_Load(datadir.c_str()); 221 if(abubble==NULL) 222 { 223 cerr<<"ERROR: unable to load labels.png.\n"; 224 exit(1); 225 } 226 datadir=DATA_PREFIX; 227 datadir+="/checkshot.png"; 228 boxChecked=IMG_Load(datadir.c_str()); 229 if(boxChecked==NULL) 230 { 231 cerr<<"ERROR: unable to load checkshot.png.\n"; 232 exit(1); 233 } 234 datadir=DATA_PREFIX; 235 datadir+="/checkboxshot.png"; 236 boxUnchecked=IMG_Load(datadir.c_str()); 237 if(boxUnchecked==NULL) 238 { 239 cerr<<"ERROR: unable to load checkboxshot.png.\n"; 240 exit(1); 241 } 242 datadir=DATA_PREFIX; 243 datadir+="/font2.png"; 244 font=BFont_LoadFont(datadir.c_str()); 245 if(font==NULL) 246 { 247 cerr<<"ERROR: unable to load font2.\n"; 248 exit(1); 249 } 250 audio->clearSounds(); 251 SDL_PauseAudio(0); 252 for(;;) 253 { 254 initButtons(); 255 SDL_WM_SetCaption("OpenBubbles","OpenBubbles"); 256 currentimage=PI_ABUBBLE; 257 from_alpha=255; 258 to_alpha=0; 259 from=pi; 260 to=abubble; 261 for(;;) 262 { 263 time1=clock()/CLOCKS_PER_SEC; //get time at start of loop 264 result=handleButtons(); 265 fadingOn=isChecked("fading"); 266 soundOn=isChecked("sound"); 267 audio->mute(!soundOn); 268 while(SDL_PollEvent(&event)) 269 { 270 if(event.type==SDL_QUIT) 271 goto leave; 272 else if((event.type==SDL_KEYUP)&&(event.key.keysym.sym==SDLK_RETURN)) 273 result="start"; 274 } 275 boxRGBA(screen,0,0,SCREEN_WIDTH-1,SCREEN_HEIGHT-1,0,0,0,255); 276 // Animation code. 277 switch(currentimage) 278 { 279 case PI_ABUBBLE: 280 from=pi; 281 to=abubble; 282 break; 283 case ABUBBLE_VERSION: 284 from=abubble; 285 to=version; 286 break; 287 case VERSION_ABUBBLE: 288 from=version; 289 to=abubble; 290 break; 291 case ABUBBLE_PI: 292 from=abubble; 293 to=pi; 294 } 295 to_alpha+=ANIMATION_RATE; 296 if(to_alpha>=255) 297 { 298 SDL_SetAlpha(to,SDL_SRCALPHA,255); 299 // Rotate the images. 300 if(currentimage==ABUBBLE_PI) 301 currentimage=PI_ABUBBLE; 302 else 303 currentimage++; 304 to_alpha=0; 305 } 306 else 307 { 308 SDL_SetAlpha(from,SDL_SRCALPHA,from_alpha); 309 SDL_SetAlpha(to,SDL_SRCALPHA,to_alpha); 310 } 311 // Logo blitting. 312 src.x=0; 313 src.y=0; 314 src.w=logo->w; 315 src.h=logo->h; 316 dest.x=SCREEN_WIDTH/2-src.w/2; 317 dest.y=10; 318 dest.w=src.w; 319 dest.h=src.h; 320 SDL_BlitSurface(logo,&src,screen,&dest); 321 // Animation blitting. 322 src.w=ANIMATION_WIDTH; 323 src.h=ANIMATION_HEIGHT; 324 dest.x=SCREEN_WIDTH/2+105; 325 dest.y=115; 326 dest.w=src.w; 327 dest.h=src.h; 328 SDL_BlitSurface(from,&src,screen,&dest); 329 SDL_BlitSurface(to,&src,screen,&dest); 330 // "Visit ..." blitting. 331 src.w=visit->w; 332 src.h=visit->h; 333 dest.x=SCREEN_WIDTH/2-src.w/2; 334 dest.y=360; 335 dest.w=src.w; 336 dest.h=src.h; 337 SDL_BlitSurface(visit,&src,screen,&dest); 338 // Copyright notice blitting. 339 src.w=copyright->w; 340 src.h=copyright->h; 341 dest.x=SCREEN_WIDTH/2-src.w/2; 342 dest.y=380; 343 dest.w=src.w; 344 dest.h=src.h; 345 SDL_BlitSurface(copyright,&src,screen,&dest); 346 // Checkbox label blitting. 347 src.w=labels->w; 348 src.h=labels->h; 349 dest.x=SCREEN_WIDTH/2+120; 350 dest.y=232; 351 dest.w=src.w; 352 dest.h=src.h; 353 SDL_BlitSurface(labels,&src,screen,&dest); 354 drawButtons(); 355 SDL_UpdateRect(screen,0,0,screen->w,screen->h); 356 if(strcmp(result,"start")==0) 357 { 358 if(fadingOn) 359 transition(GAME); 360 break; 361 } 362 // Load the instructions. 363 else if(strcmp(result,"instructions")==0) 364 { 365 for(list<button*>::iterator i=buttons.begin();i!=buttons.end();i++) 366 (*i)->freeSurfaces(); 367 buttons.clear(); 368 checkboxes.clear(); 369 buttons.push_back(new button(SCREEN_WIDTH/2-140,420,"return.png", 370 "return","return_hilight.png", 371 "return_pressed.png")); 372 if(fadingOn) 373 transition(INSTRUCTIONS); 374 for(;;) 375 { 376 time1=clock()/CLOCKS_PER_SEC; //get time at start of loop 377 while(SDL_PollEvent(&event)) 378 if(event.type==SDL_QUIT) 379 goto leave; 380 boxRGBA(screen,0,0,SCREEN_WIDTH-1,SCREEN_HEIGHT-1,0,0,0,255); 381 src.x=0; 382 src.y=0; 383 src.w=instructions->w; 384 src.h=instructions->h; 385 dest.x=SCREEN_WIDTH/2-src.w/2; 386 dest.y=10; 387 dest.w=src.w; 388 dest.h=src.h; 389 SDL_BlitSurface(instructions,&src,screen,&dest); 390 drawButtons(); 391 SDL_UpdateRect(screen,0,0,screen->w,screen->h); 392 if(strcmp(handleButtons(),"return")==0) 393 break; 394 else if(strcmp(handleButtons(),"quit")==0) 395 goto leave; 396 time2=clock()/CLOCKS_PER_SEC; //get time at end of loop 397 diff_time=time2-time1; //compare... 398 pause_time=30-diff_time; 399 SDL_Delay(pause_time); //and pause for required amount of time 400 } 401 for(list<button*>::iterator i=buttons.begin();i!=buttons.end();i++) 402 (*i)->freeSurfaces(); 403 buttons.clear(); 404 checkboxes.clear(); 405 while(SDL_PollEvent(&event)); // Flush events. 406 initButtons(); 407 currentimage=PI_ABUBBLE; 408 from_alpha=255; 409 to_alpha=0; 410 from=pi; 411 to=abubble; 412 if(fadingOn) 413 transition(MENU); 414 } 415 else if(strcmp(result,"highscores")==0) 416 { 417 displayHighScores(fadingOn); 418 buttons.clear(); 419 while(SDL_PollEvent(&event)); // Flush events. 420 initButtons(); 421 } 422 else if(strcmp(result,"quit")==0) 423 goto leave; 424 time2=clock()/CLOCKS_PER_SEC; //get time at end of loop 425 diff_time=time2-time1; //compare... 426 pause_time=30-diff_time; 427 SDL_Delay(pause_time); //and pause for required amount of time 428 } 429 score=gameloop(); 430 // Check to see if the player got a high score. 431 for(vector<highscore>::iterator i=high_scores.begin();i!=high_scores.end(); 432 i++) 433 if(score>(*i).score()) // They got one. 434 { 435 for(list<button*>::iterator j=buttons.begin();j!=buttons.end();j++) 436 (*j)->freeSurfaces(); 437 buttons.clear(); 438 checkboxes.clear(); 439 buttons.push_back(new button(SCREEN_WIDTH/2-70, 440 SCREEN_HEIGHT/2-enterback->h/2+62, 441 "ok.png","ok","ok_hilight.png", 442 "ok_pressed.png")); 443 buttons.push_back(new button(SCREEN_WIDTH/2+3, 444 SCREEN_HEIGHT/2-enterback->h/2+62, 445 "cancel.png","cancel", 446 "cancel_hilight.png", 447 "cancel_pressed.png")); 448 src.x=src.y=0; 449 cursor_pos=0; 450 name=""; 451 SDL_EnableKeyRepeat(300,30); 452 cursor_alpha=0; 453 cursor_direction=UP; 454 if(fadingOn) 455 transition(HIGHSCORE); 456 for(;;) 457 { 458 time1=clock()/CLOCKS_PER_SEC; //get time at start of loop 459 result=handleButtons(); 460 while(SDL_PollEvent(&event)) 461 { 462 if(event.type==SDL_QUIT) 463 goto leave; 464 else if((event.type==SDL_KEYUP)&& 465 (event.key.keysym.sym==SDLK_RETURN)) 466 result="ok"; 467 else 468 typestr(event,name,cursor_pos,font); 469 } 470 if(cursor_direction==UP) 471 { 472 cursor_alpha+=CURSOR_PULSE_RATE; 473 if(cursor_alpha>=255) 474 { 475 cursor_alpha=255; 476 cursor_direction=DOWN; 477 } 478 } 479 else 480 { 481 cursor_alpha-=CURSOR_PULSE_RATE; 482 if(cursor_alpha<=0) 483 { 484 cursor_alpha=0; 485 cursor_direction=UP; 486 } 487 } 488 SDL_SetAlpha(cursor,SDL_SRCALPHA,cursor_alpha); 489 boxRGBA(screen,0,0,SCREEN_WIDTH-1,SCREEN_HEIGHT-1,0,0,0,255); 490 src.w=highbanner->w; 491 src.h=highbanner->h; 492 dest.x=SCREEN_WIDTH/2-src.w/2; 493 dest.y=SCREEN_HEIGHT/4-src.h/2; 494 dest.w=src.w; 495 dest.h=src.h; 496 SDL_BlitSurface(highbanner,&src,screen,&dest); 497 src.w=enterback->w; 498 src.h=enterback->h; 499 dest.x=SCREEN_WIDTH/2-src.w/2; 500 dest.y=SCREEN_HEIGHT/2-src.h/2; 501 dest.w=src.w; 502 dest.h=src.h; 503 SDL_BlitSurface(enterback,&src,screen,&dest); 504 for(unsigned int j=0;j<name.length();j++) 505 temp[j]=name[j]; 506 temp[name.length()]='\0'; 507 BFont_PutStringFont(screen,font,dest.x+33,dest.y+40,temp); 508 totalwidth=0; 509 for(int j=0;j<cursor_pos;j++) 510 totalwidth+=BFont_CharWidth(font,name[j]); 511 src.w=cursor->w; 512 src.h=cursor->h; 513 dest.x+=33+totalwidth; 514 dest.y+=40; 515 dest.w=src.w; 516 dest.h=src.h; 517 SDL_BlitSurface(cursor,&src,screen,&dest); 518 drawButtons(); 519 SDL_UpdateRect(screen,0,0,screen->w,screen->h); 520 if(strcmp(result,"ok")==0) 521 { 522 high_scores.insert(i,highscore(name,(int)score)); 523 high_scores.pop_back(); 524 saveEverything(); 525 break; 526 } 527 else if(strcmp(result,"cancel")==0) 528 break; 529 time2=clock()/CLOCKS_PER_SEC; //get time at end of loop 530 diff_time=time2-time1; //compare... 531 pause_time=30-diff_time; 532 SDL_Delay(pause_time); //and pause for required amount of time 533 } 534 SDL_EnableKeyRepeat(0,0); 535 for(list<button*>::iterator i=buttons.begin();i!=buttons.end();i++) 536 (*i)->freeSurfaces(); 537 buttons.clear(); 538 checkboxes.clear(); 539 while(SDL_PollEvent(&event)); // Flush events. 540 initButtons(); 541 break; 542 } 543 if(fadingOn) 544 transition(MENU); 545 for(list<bubble*>::iterator i=bubs.begin();i!=bubs.end();i++) 546 (*i)->freeSurfaces(); 547 bubs.clear(); 548 crumbs.clear(); 549 missles.clear(); 550 for(list<button*>::iterator i=buttons.begin();i!=buttons.end();i++) 551 (*i)->freeSurfaces(); 552 buttons.clear(); 553 checkboxes.clear(); 554 } 555leave: 556 bubs.clear(); 557 crumbs.clear(); 558 for(list<button*>::iterator i=buttons.begin();i!=buttons.end();i++) 559 (*i)->freeSurfaces(); 560 buttons.clear(); 561 checkboxes.clear(); 562 SDL_FreeSurface(labels); 563 SDL_FreeSurface(boxChecked); 564 SDL_FreeSurface(boxUnchecked); 565 SDL_FreeSurface(pi); 566 SDL_FreeSurface(version); 567 SDL_FreeSurface(abubble); 568 SDL_FreeSurface(enterback); 569 SDL_FreeSurface(highbanner); 570 SDL_FreeSurface(screen); 571 SDL_FreeSurface(icon); 572 SDL_FreeSurface(logo); 573 SDL_FreeSurface(instructions); 574 SDL_FreeSurface(visit); 575 SDL_FreeSurface(copyright); 576 SDL_FreeSurface(cursor); 577 BFont_FreeFont(font); 578 delete[] temp; 579 delete audio; 580 return 0; 581} 582 583void initButtons() 584{ 585 checkbox* fadingbox=new checkbox(SCREEN_WIDTH/2+128,246,"fading",fadingOn); 586 checkbox* soundbox=new checkbox(SCREEN_WIDTH/2+128,269,"sound",soundOn); 587 buttons.push_back(new button(SCREEN_WIDTH/2-101,BUTTONS_START,"start.png", 588 "start","start_hilight.png", 589 "start_pressed.png")); 590 buttons.push_back(new button(SCREEN_WIDTH/2-101, 591 BUTTONS_START+BUTTONS_SPACING, 592 "instructions_button.png","instructions", 593 "instructions_hilight.png", 594 "instructions_pressed.png")); 595 buttons.push_back(new button(SCREEN_WIDTH/2-101, 596 BUTTONS_START+2*BUTTONS_SPACING, 597 "highscores.png", 598 "highscores","highscores_hilight.png", 599 "highscores_pressed.png")); 600 buttons.push_back(new button(SCREEN_WIDTH/2-101, 601 BUTTONS_START+3*BUTTONS_SPACING,"quit.png", 602 "quit","quit_hilight.png","quit_pressed.png")); 603 checkboxes.push_back(fadingbox); 604 checkboxes.push_back(soundbox); 605 buttons.push_back(fadingbox); 606 buttons.push_back(soundbox); 607} 608 609void transition(char to) 610{ 611 string datadir; 612 int time1,time2,diff_time,pause_time; // Time loop 613 SDL_Surface* from_surface; 614 SDL_Surface* to_surface; 615 SDL_Rect src,dest; 616 datadir=DATA_PREFIX; 617 datadir+="/menushot.png"; 618 from_surface=IMG_Load(datadir.c_str()); 619 if(from_surface==NULL) 620 { 621 cerr<<"ERROR: unable to load from_surface.\n"; 622 exit(1); 623 } 624 // Get the SDL_Rects ready. 625 src.x=src.y=dest.x=dest.y=0; 626 src.w=dest.w=SCREEN_WIDTH; 627 src.h=dest.h=SCREEN_HEIGHT; 628 SDL_BlitSurface(screen,&src,from_surface,&dest); 629 switch(to) 630 { 631 case MENU: 632 datadir=DATA_PREFIX; 633 datadir+="/menushot.png"; 634 to_surface=IMG_Load(datadir.c_str()); 635 if(to_surface==NULL) 636 { 637 cerr<<"ERROR: unable to load menushot.\n"; 638 exit(1); 639 } 640 src.x=src.y=0; 641 src.w=boxChecked->w; 642 src.h=boxChecked->h; 643 dest.x=448; 644 dest.y=246; 645 dest.w=src.w; 646 dest.h=src.h; 647 if(fadingOn) 648 SDL_BlitSurface(boxChecked,&src,to_surface,&dest); 649 else 650 SDL_BlitSurface(boxUnchecked,&src,to_surface,&dest); 651 dest.y=269; 652 if(soundOn) 653 SDL_BlitSurface(boxChecked,&src,to_surface,&dest); 654 else 655 SDL_BlitSurface(boxUnchecked,&src,to_surface,&dest); 656 boxRGBA(screen,0,0,SCREEN_WIDTH-1,SCREEN_HEIGHT-1,0,0,0,255); 657 // Reset the SDL_Rects. 658 src.x=src.y=dest.x=dest.y=0; 659 src.w=dest.w=SCREEN_WIDTH; 660 src.h=dest.h=SCREEN_HEIGHT; 661 break; 662 case INSTRUCTIONS: 663 datadir=DATA_PREFIX; 664 datadir+="/instructionsshot.png"; 665 to_surface=IMG_Load(datadir.c_str()); 666 if(to_surface==NULL) 667 { 668 cerr<<"ERROR: unable to load instructionsshot.\n"; 669 exit(1); 670 } 671 break; 672 case GAME: 673 datadir=DATA_PREFIX; 674 datadir+="/gameshot.png"; 675 to_surface=IMG_Load(datadir.c_str()); 676 if(to_surface==NULL) 677 { 678 cerr<<"ERROR: unable to load gameshot.\n"; 679 exit(1); 680 } 681 break; 682 case HIGHSCORE: 683 datadir=DATA_PREFIX; 684 datadir+="/highshot.png"; 685 to_surface=IMG_Load(datadir.c_str()); 686 if(to_surface==NULL) 687 { 688 cerr<<"ERROR: unable to load highshot.\n"; 689 exit(1); 690 } 691 break; 692 default: 693 cerr<<"ERROR: invalid argument passed to transition().\n"; 694 exit(1); 695 } 696 for(int i=0;i<256;i+=TRANSITION_SPEED) 697 { 698 time1=clock()/CLOCKS_PER_SEC; //get time at start of loop 699 boxRGBA(screen,0,0,SCREEN_WIDTH-1,SCREEN_HEIGHT-1,0,0,0,255); 700 SDL_SetAlpha(from_surface,SDL_SRCALPHA,255-i); 701 SDL_SetAlpha(to_surface,SDL_SRCALPHA,i); 702 SDL_BlitSurface(from_surface,&src,screen,&dest); 703 SDL_BlitSurface(to_surface,&src,screen,&dest); 704 SDL_UpdateRect(screen,0,0,screen->w,screen->h); 705 time2=clock()/CLOCKS_PER_SEC; //get time at end of loop 706 diff_time=time2-time1; //compare... 707 pause_time=25-diff_time; 708 SDL_Delay(pause_time); //and pause for required amount of time 709 } 710 SDL_FreeSurface(from_surface); 711 SDL_FreeSurface(to_surface); 712} 713
