Source/OpenGL_Windows.cpp

   1 /*
   2 Copyright (C) 2003, 2010 - Wolfire Games
   3
   4 This file is part of Lugaru.
   5
   6 Lugaru 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.
  14
  15 See the GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20 */
  21
  22
  23 #ifdef WIN32
  24 #define UINT8 WIN32API_UINT8
  25 #define UINT16 WIN32API_UINT16
  26 #define boolean WIN32API_boolean
  27 #include <windows.h>
  28 #undef UINT8
  29 #undef UINT16
  30 #undef boolean
  31 #endif
  32
  33
  34
  35 #include "Game.h"
  36 extern "C" {
  37         #include "zlib.h"
  38         #include "png.h"
  39    #ifdef WIN32
  40                 #define INT32 INT32_jpeg
  41                 #include "jpeglib.h"
  42                 #undef INT32
  43         #else
  44                 #include "jpeglib.h"
  45         #endif
  46 }
  47
  48 static bool load_image(const char * fname, TGAImageRec & tex);
  49 static bool load_png(const char * fname, TGAImageRec & tex);
  50 static bool load_jpg(const char * fname, TGAImageRec & tex);
  51 bool save_image(const char * fname);
  52 static bool save_png(const char * fname);
  53
  54
  55 #include "openal_wrapper.h"
  56
  57 // ADDED GWC
  58 #ifdef _MSC_VER
  59 #pragma comment(lib, "opengl32.lib")
  60 #pragma comment(lib, "glu32.lib")
  61 #pragma comment(lib, "glaux.lib")
  62 #endif
  63
  64 extern float multiplier;
  65 extern float sps;
  66 extern float realmultiplier;
  67 extern int slomo;
  68 extern bool cellophane;
  69 extern float terraindetail;
  70 extern float texdetail;
  71
  72 extern bool osx;
  73 extern int numplayers;
  74 extern bool freeze;
  75 extern Person player[maxplayers];
  76 extern bool stillloading;
  77 extern int mainmenu;
  78 /*extern*/ bool gameFocused;
  79
  80 extern float slomospeed;
  81 extern float slomofreq;
  82
  83
  84
  85 #include <math.h>
  86 #include <stdio.h>
  87 #include <string.h>
  88 #include <fstream>
  89 #include <iostream>
  90 #include "gamegl.h"
  91 #include "MacCompatibility.h"
  92 #include "Settings.h"
  93
  94 #ifdef WIN32
  95 #include <shellapi.h>
  96 #include "win-res/resource.h"
  97 #endif
  98
  99 using namespace std;
 100
 101 SDL_Rect **resolutions = NULL;
 102 static SDL_Rect rect_1024_768 = { 0, 0, 1024, 768 };
 103 static SDL_Rect rect_800_600  = { 0, 0, 800,  600 };
 104 static SDL_Rect rect_640_480  = { 0, 0, 640,  480 };
 105 static SDL_Rect *hardcoded_resolutions[] = {
 106     &rect_1024_768,
 107     &rect_800_600,
 108     &rect_640_480,
 109     NULL
 110 };
 111
 112 void DrawGL(Game & game);
 113
 114 Boolean SetUp (Game & game);
 115 void DoUpdate (Game & game);
 116
 117 void CleanUp (void);
 118
 119 // statics/globals (internal only) ------------------------------------------
 120
 121 #ifdef _MSC_VER
 122 #pragma warning(push)
 123 #pragma warning(disable: 4273)
 124 #endif
 125
 126 #define GL_FUNC(ret,fn,params,call,rt) \
 127     extern "C" { \
 128         static ret (GLAPIENTRY *p##fn) params = NULL; \
 129         ret GLAPIENTRY fn params { rt p##fn call; } \
 130     }
 131 #include "glstubs.h"
 132 #undef GL_FUNC
 133
 134 #ifdef _MSC_VER
 135 #pragma warning(pop)
 136 #endif
 137
 138 static bool lookup_glsym(const char *funcname, void **func)
 139 {
 140     *func = SDL_GL_GetProcAddress(funcname);
 141     if (*func == NULL)
 142     {
 143         fprintf(stderr, "Failed to find OpenGL symbol \"%s\"\n", funcname);
 144         return false;
 145     }
 146     return true;
 147 }
 148
 149 static bool lookup_all_glsyms(void)
 150 {
 151     bool retval = true;
 152     #define GL_FUNC(ret,fn,params,call,rt) \
 153         if (!lookup_glsym(#fn, (void **) &p##fn)) retval = false;
 154     #include "glstubs.h"
 155     #undef GL_FUNC
 156     return retval;
 157 }
 158
 159 static void GLAPIENTRY glDeleteTextures_doNothing(GLsizei n, const GLuint *textures)
 160 {
 161     // no-op.
 162 }
 163
 164 #ifdef MessageBox
 165 #undef MessageBox
 166 #endif
 167 #define MessageBox(hwnd,text,title,flags) STUBBED("msgbox")
 168
 169 // Menu defs
 170
 171 int kContextWidth;
 172 int kContextHeight;
 173
 174 Boolean gDone = false;
 175
 176 Game * pgame = 0;
 177
 178 #ifndef __MINGW32__
 179 static int _argc = 0;
 180 static char **_argv = NULL;
 181 #endif
 182
 183 bool cmdline(const char *cmd)
 184 {
 185     for (int i = 1; i < _argc; i++)
 186     {
 187         char *arg = _argv[i];
 188         while (*arg == '-')
 189             arg++;
 190         if (strcasecmp(arg, cmd) == 0)
 191             return true;
 192     }
 193
 194     return false;
 195 }
 196
 197 //-----------------------------------------------------------------------------------------------------------------------
 198
 199 // OpenGL Drawing
 200
 201 static void sdlEventProc(const SDL_Event &e, Game &game)
 202 {
 203     switch(e.type)
 204         {
 205         case SDL_MOUSEMOTION:
 206             game.deltah += e.motion.xrel;
 207             game.deltav += e.motion.yrel;
 208             return;
 209
 210         case SDL_KEYDOWN:
 211             if ((e.key.keysym.sym == SDLK_g) &&
 212                                 (e.key.keysym.mod & KMOD_CTRL) &&
 213                                 !(SDL_GetVideoSurface()->flags & SDL_FULLSCREEN) ) {
 214                                 SDL_WM_GrabInput( ((SDL_WM_GrabInput(SDL_GRAB_QUERY)==SDL_GRAB_ON) ? SDL_GRAB_OFF:SDL_GRAB_ON) );
 215                         } else if ( (e.key.keysym.sym == SDLK_RETURN) && (e.key.keysym.mod & KMOD_ALT) ) {
 216                                 SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
 217             }
 218             return;
 219     }
 220 }
 221
 222
 223 // --------------------------------------------------------------------------
 224
 225 static Point gMidPoint;
 226
 227 Boolean SetUp (Game & game)
 228 {
 229         char string[10];
 230
 231         LOGFUNC;
 232
 233         randSeed = UpTime().lo;
 234
 235         osx = 0;
 236         cellophane=0;
 237         texdetail=4;
 238         terraindetail=2;
 239         slomospeed=0.25;
 240         slomofreq=8012;
 241         numplayers=1;
 242
 243         DefaultSettings(game);
 244
 245     if (!SDL_WasInit(SDL_INIT_VIDEO))
 246         if (SDL_Init(SDL_INIT_VIDEO) == -1)
 247         {
 248             fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError());
 249             return false;
 250         }
 251         if(!LoadSettings(game)) {
 252                 fprintf(stderr, "Failed to load config, creating default\n");
 253                 SaveSettings(game);
 254         }
 255         if(kBitsPerPixel!=32&&kBitsPerPixel!=16){
 256                 kBitsPerPixel=16;
 257         }
 258
 259         if (SDL_GL_LoadLibrary(NULL) == -1)
 260         {
 261                 fprintf(stderr, "SDL_GL_LoadLibrary() failed: %s\n", SDL_GetError());
 262                 SDL_Quit();
 263                 return false;
 264         }
 265
 266         SDL_Rect **res = SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_OPENGL);
 267         if ( (res == NULL) || (res == ((SDL_Rect **)-1)) || (res[0] == NULL) || (res[0]->w < 640) || (res[0]->h < 480) )
 268                 res = hardcoded_resolutions;
 269
 270         // reverse list (it was sorted biggest to smallest by SDL)...
 271         int count;
 272         for (count = 0; res[count]; count++)
 273         {
 274                 if ((res[count]->w < 640) || (res[count]->h < 480))
 275                         break;   // sane lower limit.
 276         }
 277
 278         static SDL_Rect *resolutions_block = NULL;
 279         resolutions_block = (SDL_Rect*) realloc(resolutions_block, sizeof (SDL_Rect) * count);
 280         resolutions = (SDL_Rect**) realloc(resolutions, sizeof (SDL_Rect *) * (count + 1));
 281         if ((resolutions_block == NULL) || (resolutions == NULL))
 282         {
 283                 SDL_Quit();
 284                 fprintf(stderr, "Out of memory!\n");
 285                 return false;
 286         }
 287
 288         resolutions[count--] = NULL;
 289         for (int i = 0; count >= 0; i++, count--)
 290         {
 291                 memcpy(&resolutions_block[count], res[i], sizeof (SDL_Rect));
 292                 resolutions[count] = &resolutions_block[count];
 293         }
 294
 295         if (cmdline("showresolutions"))
 296         {
 297                 printf("Resolutions we think are okay:\n");
 298                 for (int i = 0; resolutions[i]; i++)
 299                         printf("  %d x %d\n", (int) resolutions[i]->w, (int) resolutions[i]->h);
 300         }
 301
 302     Uint32 sdlflags = SDL_OPENGL;
 303     if (!cmdline("windowed"))
 304         sdlflags |= SDL_FULLSCREEN;
 305
 306     SDL_WM_SetCaption("Lugaru", "Lugaru");
 307
 308     SDL_ShowCursor(0);
 309
 310     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 311     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
 312
 313     if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 314     {
 315         fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 316         fprintf(stderr, "forcing 640x480...\n");
 317         kContextWidth = 640;
 318         kContextHeight = 480;
 319         if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 320         {
 321             fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 322             fprintf(stderr, "forcing 640x480 windowed mode...\n");
 323             sdlflags &= ~SDL_FULLSCREEN;
 324             if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 325             {
 326                 fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 327                 return false;
 328             }
 329         }
 330     }
 331
 332     int dblbuf = 0;
 333     if ((SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &dblbuf) == -1) || (!dblbuf))
 334     {
 335         fprintf(stderr, "Failed to get double buffered GL context!\n");
 336         SDL_Quit();
 337         return false;
 338     }
 339
 340     if (!lookup_all_glsyms())
 341     {
 342         SDL_Quit();
 343         return false;
 344     }
 345
 346     if (!cmdline("nomousegrab"))
 347         SDL_WM_GrabInput(SDL_GRAB_ON);
 348
 349
 350         glClear( GL_COLOR_BUFFER_BIT );
 351         swap_gl_buffers();
 352
 353         // clear all states
 354         glDisable( GL_ALPHA_TEST);
 355         glDisable( GL_BLEND);
 356         glDisable( GL_DEPTH_TEST);
 357         //      glDisable( GL_DITHER);
 358         glDisable( GL_FOG);
 359         glDisable( GL_LIGHTING);
 360         glDisable( GL_LOGIC_OP);
 361         glDisable( GL_TEXTURE_1D);
 362         glDisable( GL_TEXTURE_2D);
 363         glPixelTransferi( GL_MAP_COLOR, GL_FALSE);
 364         glPixelTransferi( GL_RED_SCALE, 1);
 365         glPixelTransferi( GL_RED_BIAS, 0);
 366         glPixelTransferi( GL_GREEN_SCALE, 1);
 367         glPixelTransferi( GL_GREEN_BIAS, 0);
 368         glPixelTransferi( GL_BLUE_SCALE, 1);
 369         glPixelTransferi( GL_BLUE_BIAS, 0);
 370         glPixelTransferi( GL_ALPHA_SCALE, 1);
 371         glPixelTransferi( GL_ALPHA_BIAS, 0);
 372
 373         // set initial rendering states
 374         glShadeModel( GL_SMOOTH);
 375         glClearDepth( 1.0f);
 376         glDepthFunc( GL_LEQUAL);
 377         glDepthMask( GL_TRUE);
 378         //      glDepthRange( FRONT_CLIP, BACK_CLIP);
 379         glEnable( GL_DEPTH_TEST);
 380         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 381         glCullFace( GL_FRONT);
 382         glEnable( GL_CULL_FACE);
 383         glEnable( GL_LIGHTING);
 384 //      glEnable( GL_LIGHT_MODEL_AMBIENT);
 385         glEnable( GL_DITHER);
 386         glEnable( GL_COLOR_MATERIAL);
 387         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 388         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 389         glAlphaFunc( GL_GREATER, 0.5f);
 390
 391         GLint width = kContextWidth;
 392         GLint height = kContextHeight;
 393         gMidPoint.h = width / 2;
 394         gMidPoint.v = height / 2;
 395         screenwidth=width;
 396         screenheight=height;
 397
 398         game.newdetail=detail;
 399         game.newscreenwidth=screenwidth;
 400         game.newscreenheight=screenheight;
 401
 402         if ( CanInitStereo(stereomode) ) {
 403                 InitStereo(stereomode);
 404         } else {
 405                 fprintf(stderr, "Failed to initialize stereo, disabling.\n");
 406                 stereomode = stereoNone;
 407         }
 408
 409         game.InitGame();
 410
 411         return true;
 412 }
 413
 414
 415 static void DoMouse(Game & game)
 416 {
 417
 418         if(mainmenu||(abs(game.deltah)<10*realmultiplier*1000&&abs(game.deltav)<10*realmultiplier*1000))
 419         {
 420                 game.deltah *= usermousesensitivity;
 421                 game.deltav *= usermousesensitivity;
 422                 game.mousecoordh += game.deltah;
 423                 game.mousecoordv += game.deltav;
 424         if (game.mousecoordh < 0)
 425             game.mousecoordh = 0;
 426         else if (game.mousecoordh >= kContextWidth)
 427             game.mousecoordh = kContextWidth - 1;
 428         if (game.mousecoordv < 0)
 429             game.mousecoordv = 0;
 430         else if (game.mousecoordv >= kContextHeight)
 431             game.mousecoordv = kContextHeight - 1;
 432         }
 433
 434 }
 435
 436 void DoFrameRate (int update)
 437 {
 438         static long frames = 0;
 439
 440         static AbsoluteTime time = {0,0};
 441         static AbsoluteTime frametime = {0,0};
 442         AbsoluteTime currTime = UpTime ();
 443         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, frametime);
 444
 445         if (0 > deltaTime)      // if negative microseconds
 446                 deltaTime /= -1000000.0;
 447         else                            // else milliseconds
 448                 deltaTime /= 1000.0;
 449
 450         multiplier=deltaTime;
 451         if(multiplier<.001) multiplier=.001;
 452         if(multiplier>10) multiplier=10;
 453         if(update) frametime = currTime;        // reset for next time interval
 454
 455         deltaTime = (float) AbsoluteDeltaToDuration (currTime, time);
 456
 457         if (0 > deltaTime)      // if negative microseconds
 458                 deltaTime /= -1000000.0;
 459         else                            // else milliseconds
 460                 deltaTime /= 1000.0;
 461         frames++;
 462         if (0.001 <= deltaTime) // has update interval passed
 463         {
 464                 if(update){
 465                         time = currTime;        // reset for next time interval
 466                         frames = 0;
 467                 }
 468         }
 469 }
 470
 471
 472 void DoUpdate (Game & game)
 473 {
 474         static float sps=200;
 475         static int count;
 476         static float oldmult;
 477
 478         DoFrameRate(1);
 479         if(multiplier>.6)multiplier=.6;
 480
 481         game.fps=1/multiplier;
 482
 483         count = multiplier*sps;
 484         if(count<2)count=2;
 485         //if(count>10)count=10;
 486
 487         realmultiplier=multiplier;
 488         multiplier*=gamespeed;
 489         if(difficulty==1)multiplier*=.9;
 490         if(difficulty==0)multiplier*=.8;
 491
 492         if(game.loading==4)multiplier*=.00001;
 493         //multiplier*.9;
 494         if(slomo&&!mainmenu)multiplier*=slomospeed;
 495         //if(freeze)multiplier*=0.00001;
 496         oldmult=multiplier;
 497         multiplier/=(float)count;
 498
 499         DoMouse(game);
 500
 501         game.TickOnce();
 502
 503         for(int i=0;i<count;i++)
 504         {
 505                 game.Tick();
 506         }
 507         multiplier=oldmult;
 508
 509         game.TickOnceAfter();
 510 /* - Debug code to test how many channels were active on average per frame
 511         static long frames = 0;
 512
 513         static AbsoluteTime start = {0,0};
 514         AbsoluteTime currTime = UpTime ();
 515         static int num_channels = 0;
 516
 517         num_channels += OPENAL_GetChannelsPlaying();
 518         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, start);
 519
 520         if (0 > deltaTime)      // if negative microseconds
 521                 deltaTime /= -1000000.0;
 522         else                            // else milliseconds
 523                 deltaTime /= 1000.0;
 524
 525         ++frames;
 526
 527         if (deltaTime >= 1)
 528         {
 529                 start = currTime;
 530                 float avg_channels = (float)num_channels / (float)frames;
 531
 532                 ofstream opstream("log.txt",ios::app);
 533                 opstream << "Average frame count: ";
 534                 opstream << frames;
 535                 opstream << " frames - ";
 536                 opstream << avg_channels;
 537                 opstream << " per frame.\n";
 538                 opstream.close();
 539
 540                 frames = 0;
 541                 num_channels = 0;
 542         }
 543 */
 544         game.DrawGL();
 545 }
 546
 547 // --------------------------------------------------------------------------
 548
 549
 550 void CleanUp (void)
 551 {
 552         LOGFUNC;
 553
 554     SDL_Quit();
 555     #define GL_FUNC(ret,fn,params,call,rt) p##fn = NULL;
 556     #include "glstubs.h"
 557     #undef GL_FUNC
 558     // cheat here...static destructors are calling glDeleteTexture() after
 559     //  the context is destroyed and libGL unloaded by SDL_Quit().
 560     pglDeleteTextures = glDeleteTextures_doNothing;
 561
 562 }
 563
 564 // --------------------------------------------------------------------------
 565
 566 static bool IsFocused()
 567 {
 568     return ((SDL_GetAppState() & SDL_APPINPUTFOCUS) != 0);
 569 }
 570
 571
 572 static void launch_web_browser(const char *url)
 573 {
 574 #ifdef WIN32
 575     ShellExecute(NULL, "open", url, NULL, NULL, SW_SHOWNORMAL);
 576
 577 #elif (defined(__APPLE__) && defined(__MACH__))
 578     const char *fmt = "open '%s'";
 579     const size_t len = strlen(fmt) + strlen(url) + 16;
 580     char *buf = new char[len];
 581     snprintf(buf, len, fmt, url);
 582     system(buf);
 583     delete[] buf;
 584
 585 #elif PLATFORM_LINUX
 586     const char *fmt = "PATH=$PATH:. xdg-open '%s'";
 587     const size_t len = strlen(fmt) + strlen(url) + 16;
 588     char *buf = new char[len];
 589     snprintf(buf, len, fmt, url);
 590     system(buf);
 591     delete[] buf;
 592 #endif
 593 }
 594
 595
 596 #ifndef WIN32
 597 // (code lifted from physfs: http://icculus.org/physfs/ ... zlib license.)
 598 static char *findBinaryInPath(const char *bin, char *envr)
 599 {
 600     size_t alloc_size = 0;
 601     char *exe = NULL;
 602     char *start = envr;
 603     char *ptr;
 604
 605     do
 606     {
 607         size_t size;
 608         ptr = strchr(start, ':');  /* find next $PATH separator. */
 609         if (ptr)
 610             *ptr = '\0';
 611
 612         size = strlen(start) + strlen(bin) + 2;
 613         if (size > alloc_size)
 614         {
 615             char *x = (char *) realloc(exe, size);
 616             if (x == NULL)
 617             {
 618                 if (exe != NULL)
 619                     free(exe);
 620                 return(NULL);
 621             } /* if */
 622
 623             alloc_size = size;
 624             exe = x;
 625         } /* if */
 626
 627         /* build full binary path... */
 628         strcpy(exe, start);
 629         if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
 630             strcat(exe, "/");
 631         strcat(exe, bin);
 632
 633         if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
 634         {
 635             strcpy(exe, start);  /* i'm lazy. piss off. */
 636             return(exe);
 637         } /* if */
 638
 639         start = ptr + 1;  /* start points to beginning of next element. */
 640     } while (ptr != NULL);
 641
 642     if (exe != NULL)
 643         free(exe);
 644
 645     return(NULL);  /* doesn't exist in path. */
 646 } /* findBinaryInPath */
 647
 648
 649 char *calcBaseDir(const char *argv0)
 650 {
 651     /* If there isn't a path on argv0, then look through the $PATH for it. */
 652     char *retval;
 653     char *envr;
 654
 655     const char *ptr = strrchr((char *)argv0, '/');
 656     if (strchr(argv0, '/'))
 657     {
 658         retval = strdup(argv0);
 659         if (retval)
 660             *((char *) strrchr(retval, '/')) = '\0';
 661         return(retval);
 662     }
 663
 664     envr = getenv("PATH");
 665     if (!envr) return NULL;
 666     envr = strdup(envr);
 667     if (!envr) return NULL;
 668     retval = findBinaryInPath(argv0, envr);
 669     free(envr);
 670     return(retval);
 671 }
 672
 673 static inline void chdirToAppPath(const char *argv0)
 674 {
 675     char *dir = calcBaseDir(argv0);
 676     if (dir)
 677     {
 678         #if (defined(__APPLE__) && defined(__MACH__))
 679         // Chop off /Contents/MacOS if it's at the end of the string, so we
 680         //  land in the base of the app bundle.
 681         const size_t len = strlen(dir);
 682         const char *bundledirs = "/Contents/MacOS";
 683         const size_t bundledirslen = strlen(bundledirs);
 684         if (len > bundledirslen)
 685         {
 686             char *ptr = (dir + len) - bundledirslen;
 687             if (strcasecmp(ptr, bundledirs) == 0)
 688                 *ptr = '\0';
 689         }
 690         #endif
 691         chdir(dir);
 692         free(dir);
 693     }
 694 }
 695 #endif
 696
 697
 698 int main(int argc, char **argv)
 699 {
 700 #ifndef __MINGW32__
 701     _argc = argc;
 702     _argv = argv;
 703 #endif
 704
 705     // !!! FIXME: we could use a Win32 API for this.  --ryan.
 706 #ifndef WIN32
 707     chdirToAppPath(argv[0]);
 708 #endif
 709
 710         LOGFUNC;
 711
 712         try
 713         {
 714                 bool regnow = false;
 715                 {
 716                         Game game;
 717                         pgame = &game;
 718
 719                         //ofstream os("error.txt");
 720                         //os.close();
 721                         //ofstream os("log.txt");
 722                         //os.close();
 723
 724                         if (!SetUp (game))
 725                 return 42;
 726
 727                         while (!gDone&&!game.quit&&(!game.tryquit))
 728                         {
 729                                 if (IsFocused())
 730                                 {
 731                                         gameFocused = true;
 732
 733                                         // check windows messages
 734
 735                                         game.deltah = 0;
 736                                         game.deltav = 0;
 737                                         SDL_Event e;
 738                                         if(!game.isWaiting()) {
 739                                                 // message pump
 740                                                 while( SDL_PollEvent( &e ) )
 741                                                 {
 742                                                         if( e.type == SDL_QUIT )
 743                                                         {
 744                                                                 gDone=true;
 745                                                                 break;
 746                                                         }
 747                                                         sdlEventProc(e, game);
 748                                                 }
 749                                         }
 750
 751                                         // game
 752                                         DoUpdate(game);
 753                                 }
 754                                 else
 755                                 {
 756                                         if (gameFocused)
 757                                         {
 758                                                 // allow game chance to pause
 759                                                 gameFocused = false;
 760                                                 DoUpdate(game);
 761                                         }
 762
 763                                         // game is not in focus, give CPU time to other apps by waiting for messages instead of 'peeking'
 764                                         SDL_ActiveEvent evt;
 765                                         SDL_WaitEvent((SDL_Event*)&evt);
 766                                         if (evt.type == SDL_ACTIVEEVENT && evt.gain == 1)
 767                                                 gameFocused = true;
 768                                         else if (evt.type == SDL_QUIT)
 769                                                 gDone = true;
 770                                 }
 771                         }
 772
 773                         regnow = game.registernow;
 774                 }
 775                 pgame = 0;
 776
 777                 CleanUp ();
 778
 779                 return 0;
 780         }
 781         catch (const std::exception& error)
 782         {
 783                 CleanUp();
 784
 785                 std::string e = "Caught exception: ";
 786                 e += error.what();
 787
 788                 LOG(e);
 789
 790                 MessageBox(g_windowHandle, error.what(), "ERROR", MB_OK | MB_ICONEXCLAMATION);
 791         }
 792
 793         CleanUp();
 794
 795         return -1;
 796 }
 797
 798
 799
 800 // --------------------------------------------------------------------------
 801
 802 extern int channels[100];
 803 extern OPENAL_SAMPLE * samp[100];
 804 extern OPENAL_STREAM * strm[20];
 805
 806 extern "C" void PlaySoundEx(int chan, OPENAL_SAMPLE *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
 807 {
 808         const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
 809         if (currSample && currSample == samp[chan])
 810         {
 811                 if (OPENAL_GetPaused(channels[chan]))
 812                 {
 813                         OPENAL_StopSound(channels[chan]);
 814                         channels[chan] = OPENAL_FREE;
 815                 }
 816                 else if (OPENAL_IsPlaying(channels[chan]))
 817                 {
 818                         int loop_mode = OPENAL_GetLoopMode(channels[chan]);
 819                         if (loop_mode & OPENAL_LOOP_OFF)
 820                         {
 821                                 channels[chan] = OPENAL_FREE;
 822                         }
 823                 }
 824         }
 825         else
 826         {
 827                 channels[chan] = OPENAL_FREE;
 828         }
 829
 830         channels[chan] = OPENAL_PlaySoundEx(channels[chan], sptr, dsp, startpaused);
 831         if (channels[chan] < 0)
 832         {
 833                 channels[chan] = OPENAL_PlaySoundEx(OPENAL_FREE, sptr, dsp, startpaused);
 834         }
 835 }
 836
 837 extern "C" void PlayStreamEx(int chan, OPENAL_STREAM *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
 838 {
 839         const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
 840         if (currSample && currSample == OPENAL_Stream_GetSample(sptr))
 841         {
 842                         OPENAL_StopSound(channels[chan]);
 843                         OPENAL_Stream_Stop(sptr);
 844         }
 845         else
 846         {
 847                 OPENAL_Stream_Stop(sptr);
 848                 channels[chan] = OPENAL_FREE;
 849         }
 850
 851         channels[chan] = OPENAL_Stream_PlayEx(channels[chan], sptr, dsp, startpaused);
 852         if (channels[chan] < 0)
 853         {
 854                 channels[chan] = OPENAL_Stream_PlayEx(OPENAL_FREE, sptr, dsp, startpaused);
 855         }
 856 }
 857
 858
 859 bool LoadImage(const char * fname, TGAImageRec & tex)
 860 {
 861         if ( tex.data == NULL )
 862                 return false;
 863         else
 864                 return load_image(fname, tex);
 865 }
 866
 867 void ScreenShot(const char * fname)
 868 {
 869
 870 }
 871
 872
 873
 874 static bool load_image(const char *file_name, TGAImageRec &tex)
 875 {
 876     const char *ptr = strrchr((char *)file_name, '.');
 877     if (ptr)
 878     {
 879         if (strcasecmp(ptr+1, "png") == 0)
 880             return load_png(file_name, tex);
 881         else if (strcasecmp(ptr+1, "jpg") == 0)
 882             return load_jpg(file_name, tex);
 883     }
 884
 885     STUBBED("Unsupported image type");
 886     return false;
 887 }
 888
 889
 890 struct my_error_mgr {
 891   struct jpeg_error_mgr pub;    /* "public" fields */
 892   jmp_buf setjmp_buffer;        /* for return to caller */
 893 };
 894 typedef struct my_error_mgr * my_error_ptr;
 895
 896
 897 static void my_error_exit(j_common_ptr cinfo)
 898 {
 899         struct my_error_mgr *err = (struct my_error_mgr *)cinfo->err;
 900         longjmp(err->setjmp_buffer, 1);
 901 }
 902
 903 /* stolen from public domain example.c code in libjpg distribution. */
 904 static bool load_jpg(const char *file_name, TGAImageRec &tex)
 905 {
 906     struct jpeg_decompress_struct cinfo;
 907     struct my_error_mgr jerr;
 908     JSAMPROW buffer[1];         /* Output row buffer */
 909     int row_stride;             /* physical row width in output buffer */
 910     FILE *infile = fopen(file_name, "rb");
 911
 912     if (infile == NULL)
 913         return false;
 914
 915     cinfo.err = jpeg_std_error(&jerr.pub);
 916     jerr.pub.error_exit = my_error_exit;
 917     if (setjmp(jerr.setjmp_buffer)) {
 918         jpeg_destroy_decompress(&cinfo);
 919         fclose(infile);
 920         return false;
 921     }
 922
 923     jpeg_create_decompress(&cinfo);
 924     jpeg_stdio_src(&cinfo, infile);
 925     (void) jpeg_read_header(&cinfo, TRUE);
 926
 927     cinfo.out_color_space = JCS_RGB;
 928     cinfo.quantize_colors = 0;
 929     (void) jpeg_calc_output_dimensions(&cinfo);
 930     (void) jpeg_start_decompress(&cinfo);
 931
 932     row_stride = cinfo.output_width * cinfo.output_components;
 933     tex.sizeX = cinfo.output_width;
 934     tex.sizeY = cinfo.output_height;
 935     tex.bpp = 24;
 936
 937     while (cinfo.output_scanline < cinfo.output_height) {
 938         buffer[0] = (JSAMPROW)(char *)tex.data +
 939                         ((cinfo.output_height-1) - cinfo.output_scanline) * row_stride;
 940         (void) jpeg_read_scanlines(&cinfo, buffer, 1);
 941     }
 942
 943     (void) jpeg_finish_decompress(&cinfo);
 944     jpeg_destroy_decompress(&cinfo);
 945     fclose(infile);
 946
 947     return true;
 948 }
 949
 950
 951 /* stolen from public domain example.c code in libpng distribution. */
 952 static bool load_png(const char *file_name, TGAImageRec &tex)
 953 {
 954     bool hasalpha = false;
 955     png_structp png_ptr = NULL;
 956     png_infop info_ptr = NULL;
 957     png_uint_32 width, height;
 958     int bit_depth, color_type, interlace_type;
 959     png_byte **rows = NULL;
 960     bool retval = false;
 961     png_byte **row_pointers = NULL;
 962     FILE *fp = fopen(file_name, "rb");
 963
 964     if (fp == NULL)
 965         return(NULL);
 966
 967     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
 968     if (png_ptr == NULL)
 969         goto png_done;
 970
 971     info_ptr = png_create_info_struct(png_ptr);
 972     if (info_ptr == NULL)
 973         goto png_done;
 974
 975     if (setjmp(png_jmpbuf(png_ptr)))
 976         goto png_done;
 977
 978     png_init_io(png_ptr, fp);
 979     png_read_png(png_ptr, info_ptr,
 980                  PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING,
 981                  NULL);
 982     png_get_IHDR(png_ptr, info_ptr, &width, &height,
 983                  &bit_depth, &color_type, &interlace_type, NULL, NULL);
 984
 985     if (bit_depth != 8)  // transform SHOULD handle this...
 986         goto png_done;
 987
 988     if (color_type & PNG_COLOR_MASK_PALETTE)  // !!! FIXME?
 989         goto png_done;
 990
 991     if ((color_type & PNG_COLOR_MASK_COLOR) == 0)  // !!! FIXME?
 992         goto png_done;
 993
 994     hasalpha = ((color_type & PNG_COLOR_MASK_ALPHA) != 0);
 995     row_pointers = png_get_rows(png_ptr, info_ptr);
 996     if (!row_pointers)
 997         goto png_done;
 998
 999     if (!hasalpha)
1000     {
1001         png_byte *dst = tex.data;
1002         for (int i = height-1; i >= 0; i--)
1003         {
1004             png_byte *src = row_pointers[i];
1005             for (int j = 0; j < width; j++)
1006             {
1007                 dst[0] = src[0];
1008                 dst[1] = src[1];
1009                 dst[2] = src[2];
1010                 dst[3] = 0xFF;
1011                 src += 3;
1012                 dst += 4;
1013             }
1014         }
1015     }
1016
1017     else
1018     {
1019         png_byte *dst = tex.data;
1020         int pitch = width * 4;
1021         for (int i = height-1; i >= 0; i--, dst += pitch)
1022             memcpy(dst, row_pointers[i], pitch);
1023     }
1024
1025     tex.sizeX = width;
1026     tex.sizeY = height;
1027     tex.bpp = 32;
1028     retval = true;
1029
1030 png_done:
1031     png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
1032     if (fp)
1033         fclose(fp);
1034     return (retval);
1035 }
1036
1037
1038 bool save_image(const char *file_name)
1039 {
1040     const char *ptr = strrchr((char *)file_name, '.');
1041     if (ptr)
1042     {
1043         if (strcasecmp(ptr+1, "png") == 0)
1044             return save_png(file_name);
1045     }
1046
1047     STUBBED("Unsupported image type");
1048     return false;
1049 }
1050
1051
1052 static bool save_png(const char *file_name)
1053 {
1054     FILE *fp = NULL;
1055     png_structp png_ptr = NULL;
1056     png_infop info_ptr = NULL;
1057     bool retval = false;
1058
1059     fp = fopen(file_name, "wb");
1060     if (fp == NULL)
1061         return false;
1062
1063     png_bytep *row_pointers = new png_bytep[kContextHeight];
1064     png_bytep screenshot = new png_byte[kContextWidth * kContextHeight * 3];
1065     if ((!screenshot) || (!row_pointers))
1066         goto save_png_done;
1067
1068     glGetError();
1069     glReadPixels(0, 0, kContextWidth, kContextHeight,
1070                  GL_RGB, GL_UNSIGNED_BYTE, screenshot);
1071     if (glGetError() != GL_NO_ERROR)
1072         goto save_png_done;
1073
1074     for (int i = 0; i < kContextHeight; i++)
1075         row_pointers[i] = screenshot + ((kContextWidth * ((kContextHeight-1) - i)) * 3);
1076
1077     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1078     if (png_ptr == NULL)
1079         goto save_png_done;
1080
1081     info_ptr = png_create_info_struct(png_ptr);
1082     if (info_ptr == NULL)
1083         goto save_png_done;
1084
1085     if (setjmp(png_jmpbuf(png_ptr)))
1086         goto save_png_done;
1087
1088     png_init_io(png_ptr, fp);
1089
1090     if (setjmp(png_jmpbuf(png_ptr)))
1091         goto save_png_done;
1092
1093     png_set_IHDR(png_ptr, info_ptr, kContextWidth, kContextHeight,
1094                  8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
1095                  PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
1096
1097     png_write_info(png_ptr, info_ptr);
1098
1099     if (setjmp(png_jmpbuf(png_ptr)))
1100         goto save_png_done;
1101
1102         png_write_image(png_ptr, row_pointers);
1103
1104         if (setjmp(png_jmpbuf(png_ptr)))
1105         goto save_png_done;
1106
1107     png_write_end(png_ptr, NULL);
1108     retval = true;
1109
1110 save_png_done:
1111     png_destroy_write_struct(&png_ptr, &info_ptr);
1112     delete[] screenshot;
1113     delete[] row_pointers;
1114     if (fp)
1115         fclose(fp);
1116     if (!retval)
1117         unlink(ConvertFileName(file_name));
1118     return retval;
1119 }
1120
1121
1122