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         osx = 0;
 234         cellophane=0;
 235         texdetail=4;
 236         terraindetail=2;
 237         slomospeed=0.25;
 238         slomofreq=8012;
 239         numplayers=1;
 240
 241         DefaultSettings(game);
 242
 243     if (!SDL_WasInit(SDL_INIT_VIDEO))
 244         if (SDL_Init(SDL_INIT_VIDEO) == -1)
 245         {
 246             fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError());
 247             return false;
 248         }
 249         if(!LoadSettings(game)) {
 250                 fprintf(stderr, "Failed to load config, creating default\n");
 251                 SaveSettings(game);
 252         }
 253         if(kBitsPerPixel!=32&&kBitsPerPixel!=16){
 254                 kBitsPerPixel=16;
 255         }
 256
 257         if (SDL_GL_LoadLibrary(NULL) == -1)
 258         {
 259                 fprintf(stderr, "SDL_GL_LoadLibrary() failed: %s\n", SDL_GetError());
 260                 SDL_Quit();
 261                 return false;
 262         }
 263
 264         SDL_Rect **res = SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_OPENGL);
 265         if ( (res == NULL) || (res == ((SDL_Rect **)-1)) || (res[0] == NULL) || (res[0]->w < 640) || (res[0]->h < 480) )
 266                 res = hardcoded_resolutions;
 267
 268         // reverse list (it was sorted biggest to smallest by SDL)...
 269         int count;
 270         for (count = 0; res[count]; count++)
 271         {
 272                 if ((res[count]->w < 640) || (res[count]->h < 480))
 273                         break;   // sane lower limit.
 274         }
 275
 276         static SDL_Rect *resolutions_block = NULL;
 277         resolutions_block = (SDL_Rect*) realloc(resolutions_block, sizeof (SDL_Rect) * count);
 278         resolutions = (SDL_Rect**) realloc(resolutions, sizeof (SDL_Rect *) * (count + 1));
 279         if ((resolutions_block == NULL) || (resolutions == NULL))
 280         {
 281                 SDL_Quit();
 282                 fprintf(stderr, "Out of memory!\n");
 283                 return false;
 284         }
 285
 286         resolutions[count--] = NULL;
 287         for (int i = 0; count >= 0; i++, count--)
 288         {
 289                 memcpy(&resolutions_block[count], res[i], sizeof (SDL_Rect));
 290                 resolutions[count] = &resolutions_block[count];
 291         }
 292
 293         if (cmdline("showresolutions"))
 294         {
 295                 printf("Resolutions we think are okay:\n");
 296                 for (int i = 0; resolutions[i]; i++)
 297                         printf("  %d x %d\n", (int) resolutions[i]->w, (int) resolutions[i]->h);
 298         }
 299
 300     Uint32 sdlflags = SDL_OPENGL;
 301     if (!cmdline("windowed"))
 302         sdlflags |= SDL_FULLSCREEN;
 303
 304     SDL_WM_SetCaption("Lugaru", "Lugaru");
 305
 306     SDL_ShowCursor(0);
 307
 308     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 309     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
 310
 311     if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 312     {
 313         fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 314         fprintf(stderr, "forcing 640x480...\n");
 315         kContextWidth = 640;
 316         kContextHeight = 480;
 317         if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 318         {
 319             fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 320             fprintf(stderr, "forcing 640x480 windowed mode...\n");
 321             sdlflags &= ~SDL_FULLSCREEN;
 322             if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 323             {
 324                 fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 325                 return false;
 326             }
 327         }
 328     }
 329
 330     int dblbuf = 0;
 331     if ((SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &dblbuf) == -1) || (!dblbuf))
 332     {
 333         fprintf(stderr, "Failed to get double buffered GL context!\n");
 334         SDL_Quit();
 335         return false;
 336     }
 337
 338     if (!lookup_all_glsyms())
 339     {
 340         SDL_Quit();
 341         return false;
 342     }
 343
 344     if (!cmdline("nomousegrab"))
 345         SDL_WM_GrabInput(SDL_GRAB_ON);
 346
 347
 348         glClear( GL_COLOR_BUFFER_BIT );
 349         swap_gl_buffers();
 350
 351         // clear all states
 352         glDisable( GL_ALPHA_TEST);
 353         glDisable( GL_BLEND);
 354         glDisable( GL_DEPTH_TEST);
 355         //      glDisable( GL_DITHER);
 356         glDisable( GL_FOG);
 357         glDisable( GL_LIGHTING);
 358         glDisable( GL_LOGIC_OP);
 359         glDisable( GL_TEXTURE_1D);
 360         glDisable( GL_TEXTURE_2D);
 361         glPixelTransferi( GL_MAP_COLOR, GL_FALSE);
 362         glPixelTransferi( GL_RED_SCALE, 1);
 363         glPixelTransferi( GL_RED_BIAS, 0);
 364         glPixelTransferi( GL_GREEN_SCALE, 1);
 365         glPixelTransferi( GL_GREEN_BIAS, 0);
 366         glPixelTransferi( GL_BLUE_SCALE, 1);
 367         glPixelTransferi( GL_BLUE_BIAS, 0);
 368         glPixelTransferi( GL_ALPHA_SCALE, 1);
 369         glPixelTransferi( GL_ALPHA_BIAS, 0);
 370
 371         // set initial rendering states
 372         glShadeModel( GL_SMOOTH);
 373         glClearDepth( 1.0f);
 374         glDepthFunc( GL_LEQUAL);
 375         glDepthMask( GL_TRUE);
 376         //      glDepthRange( FRONT_CLIP, BACK_CLIP);
 377         glEnable( GL_DEPTH_TEST);
 378         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 379         glCullFace( GL_FRONT);
 380         glEnable( GL_CULL_FACE);
 381         glEnable( GL_LIGHTING);
 382 //      glEnable( GL_LIGHT_MODEL_AMBIENT);
 383         glEnable( GL_DITHER);
 384         glEnable( GL_COLOR_MATERIAL);
 385         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 386         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 387         glAlphaFunc( GL_GREATER, 0.5f);
 388
 389         GLint width = kContextWidth;
 390         GLint height = kContextHeight;
 391         gMidPoint.h = width / 2;
 392         gMidPoint.v = height / 2;
 393         screenwidth=width;
 394         screenheight=height;
 395
 396         game.newdetail=detail;
 397         game.newscreenwidth=screenwidth;
 398         game.newscreenheight=screenheight;
 399
 400         if ( CanInitStereo(stereomode) ) {
 401                 InitStereo(stereomode);
 402         } else {
 403                 fprintf(stderr, "Failed to initialize stereo, disabling.\n");
 404                 stereomode = stereoNone;
 405         }
 406
 407         game.InitGame();
 408
 409         return true;
 410 }
 411
 412
 413 static void DoMouse(Game & game)
 414 {
 415
 416         if(mainmenu|| ( (abs(game.deltah)<10*realmultiplier*1000) && (abs(game.deltav)<10*realmultiplier*1000) ))
 417         {
 418                 game.deltah *= usermousesensitivity;
 419                 game.deltav *= usermousesensitivity;
 420                 game.mousecoordh += game.deltah;
 421                 game.mousecoordv += game.deltav;
 422         if (game.mousecoordh < 0)
 423             game.mousecoordh = 0;
 424         else if (game.mousecoordh >= kContextWidth)
 425             game.mousecoordh = kContextWidth - 1;
 426         if (game.mousecoordv < 0)
 427             game.mousecoordv = 0;
 428         else if (game.mousecoordv >= kContextHeight)
 429             game.mousecoordv = kContextHeight - 1;
 430         }
 431
 432 }
 433
 434 void DoFrameRate (int update)
 435 {
 436         static long frames = 0;
 437
 438         static AbsoluteTime time = {0,0};
 439         static AbsoluteTime frametime = {0,0};
 440         AbsoluteTime currTime = UpTime ();
 441         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, frametime);
 442
 443         if (0 > deltaTime)      // if negative microseconds
 444                 deltaTime /= -1000000.0;
 445         else                            // else milliseconds
 446                 deltaTime /= 1000.0;
 447
 448         multiplier=deltaTime;
 449         if(multiplier<.001) multiplier=.001;
 450         if(multiplier>10) multiplier=10;
 451         if(update) frametime = currTime;        // reset for next time interval
 452
 453         deltaTime = (float) AbsoluteDeltaToDuration (currTime, time);
 454
 455         if (0 > deltaTime)      // if negative microseconds
 456                 deltaTime /= -1000000.0;
 457         else                            // else milliseconds
 458                 deltaTime /= 1000.0;
 459         frames++;
 460         if (0.001 <= deltaTime) // has update interval passed
 461         {
 462                 if(update){
 463                         time = currTime;        // reset for next time interval
 464                         frames = 0;
 465                 }
 466         }
 467 }
 468
 469
 470 void DoUpdate (Game & game)
 471 {
 472         static float sps=200;
 473         static int count;
 474         static float oldmult;
 475
 476         DoFrameRate(1);
 477         if(multiplier>.6)multiplier=.6;
 478
 479         game.fps=1/multiplier;
 480
 481         count = multiplier*sps;
 482         if(count<2)count=2;
 483
 484         realmultiplier=multiplier;
 485         multiplier*=gamespeed;
 486         if(difficulty==1)multiplier*=.9;
 487         if(difficulty==0)multiplier*=.8;
 488
 489         if(game.loading==4)multiplier*=.00001;
 490         if(slomo&&!mainmenu)multiplier*=slomospeed;
 491         oldmult=multiplier;
 492         multiplier/=(float)count;
 493
 494         DoMouse(game);
 495
 496         game.TickOnce();
 497
 498         for(int i=0;i<count;i++)
 499         {
 500                 game.Tick();
 501         }
 502         multiplier=oldmult;
 503
 504         game.TickOnceAfter();
 505 /* - Debug code to test how many channels were active on average per frame
 506         static long frames = 0;
 507
 508         static AbsoluteTime start = {0,0};
 509         AbsoluteTime currTime = UpTime ();
 510         static int num_channels = 0;
 511
 512         num_channels += OPENAL_GetChannelsPlaying();
 513         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, start);
 514
 515         if (0 > deltaTime)      // if negative microseconds
 516                 deltaTime /= -1000000.0;
 517         else                            // else milliseconds
 518                 deltaTime /= 1000.0;
 519
 520         ++frames;
 521
 522         if (deltaTime >= 1)
 523         {
 524                 start = currTime;
 525                 float avg_channels = (float)num_channels / (float)frames;
 526
 527                 ofstream opstream("log.txt",ios::app);
 528                 opstream << "Average frame count: ";
 529                 opstream << frames;
 530                 opstream << " frames - ";
 531                 opstream << avg_channels;
 532                 opstream << " per frame.\n";
 533                 opstream.close();
 534
 535                 frames = 0;
 536                 num_channels = 0;
 537         }
 538 */
 539         game.DrawGL();
 540 }
 541
 542 // --------------------------------------------------------------------------
 543
 544
 545 void CleanUp (void)
 546 {
 547         LOGFUNC;
 548
 549     SDL_Quit();
 550     #define GL_FUNC(ret,fn,params,call,rt) p##fn = NULL;
 551     #include "glstubs.h"
 552     #undef GL_FUNC
 553     // cheat here...static destructors are calling glDeleteTexture() after
 554     //  the context is destroyed and libGL unloaded by SDL_Quit().
 555     pglDeleteTextures = glDeleteTextures_doNothing;
 556
 557 }
 558
 559 // --------------------------------------------------------------------------
 560
 561 static bool IsFocused()
 562 {
 563     return ((SDL_GetAppState() & SDL_APPINPUTFOCUS) != 0);
 564 }
 565
 566
 567
 568 #ifndef WIN32
 569 // (code lifted from physfs: http://icculus.org/physfs/ ... zlib license.)
 570 static char *findBinaryInPath(const char *bin, char *envr)
 571 {
 572     size_t alloc_size = 0;
 573     char *exe = NULL;
 574     char *start = envr;
 575     char *ptr;
 576
 577     do
 578     {
 579         size_t size;
 580         ptr = strchr(start, ':');  /* find next $PATH separator. */
 581         if (ptr)
 582             *ptr = '\0';
 583
 584         size = strlen(start) + strlen(bin) + 2;
 585         if (size > alloc_size)
 586         {
 587             char *x = (char *) realloc(exe, size);
 588             if (x == NULL)
 589             {
 590                 if (exe != NULL)
 591                     free(exe);
 592                 return(NULL);
 593             } /* if */
 594
 595             alloc_size = size;
 596             exe = x;
 597         } /* if */
 598
 599         /* build full binary path... */
 600         strcpy(exe, start);
 601         if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
 602             strcat(exe, "/");
 603         strcat(exe, bin);
 604
 605         if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
 606         {
 607             strcpy(exe, start);  /* i'm lazy. piss off. */
 608             return(exe);
 609         } /* if */
 610
 611         start = ptr + 1;  /* start points to beginning of next element. */
 612     } while (ptr != NULL);
 613
 614     if (exe != NULL)
 615         free(exe);
 616
 617     return(NULL);  /* doesn't exist in path. */
 618 } /* findBinaryInPath */
 619
 620
 621 char *calcBaseDir(const char *argv0)
 622 {
 623     /* If there isn't a path on argv0, then look through the $PATH for it. */
 624     char *retval;
 625     char *envr;
 626
 627     const char *ptr = strrchr((char *)argv0, '/');
 628     if (strchr(argv0, '/'))
 629     {
 630         retval = strdup(argv0);
 631         if (retval)
 632             *((char *) strrchr(retval, '/')) = '\0';
 633         return(retval);
 634     }
 635
 636     envr = getenv("PATH");
 637     if (!envr) return NULL;
 638     envr = strdup(envr);
 639     if (!envr) return NULL;
 640     retval = findBinaryInPath(argv0, envr);
 641     free(envr);
 642     return(retval);
 643 }
 644
 645 static inline void chdirToAppPath(const char *argv0)
 646 {
 647     char *dir = calcBaseDir(argv0);
 648     if (dir)
 649     {
 650         #if (defined(__APPLE__) && defined(__MACH__))
 651         // Chop off /Contents/MacOS if it's at the end of the string, so we
 652         //  land in the base of the app bundle.
 653         const size_t len = strlen(dir);
 654         const char *bundledirs = "/Contents/MacOS";
 655         const size_t bundledirslen = strlen(bundledirs);
 656         if (len > bundledirslen)
 657         {
 658             char *ptr = (dir + len) - bundledirslen;
 659             if (strcasecmp(ptr, bundledirs) == 0)
 660                 *ptr = '\0';
 661         }
 662         #endif
 663         chdir(dir);
 664         free(dir);
 665     }
 666 }
 667 #endif
 668
 669
 670 int main(int argc, char **argv)
 671 {
 672 #ifndef __MINGW32__
 673     _argc = argc;
 674     _argv = argv;
 675 #endif
 676
 677     // !!! FIXME: we could use a Win32 API for this.  --ryan.
 678 #ifndef WIN32
 679     chdirToAppPath(argv[0]);
 680 #endif
 681
 682         LOGFUNC;
 683
 684         try
 685         {
 686                 bool regnow = false;
 687                 {
 688                         Game game;
 689                         pgame = &game;
 690
 691                         //ofstream os("error.txt");
 692                         //os.close();
 693                         //ofstream os("log.txt");
 694                         //os.close();
 695
 696                         if (!SetUp (game))
 697                 return 42;
 698
 699                         while (!gDone&&!game.quit&&(!game.tryquit))
 700                         {
 701                                 if (IsFocused())
 702                                 {
 703                                         gameFocused = true;
 704
 705                                         // check windows messages
 706
 707                                         game.deltah = 0;
 708                                         game.deltav = 0;
 709                                         SDL_Event e;
 710                                         if(!game.isWaiting()) {
 711                                                 // message pump
 712                                                 while( SDL_PollEvent( &e ) )
 713                                                 {
 714                                                         if( e.type == SDL_QUIT )
 715                                                         {
 716                                                                 gDone=true;
 717                                                                 break;
 718                                                         }
 719                                                         sdlEventProc(e, game);
 720                                                 }
 721                                         }
 722
 723                                         // game
 724                                         DoUpdate(game);
 725                                 }
 726                                 else
 727                                 {
 728                                         if (gameFocused)
 729                                         {
 730                                                 // allow game chance to pause
 731                                                 gameFocused = false;
 732                                                 DoUpdate(game);
 733                                         }
 734
 735                                         // game is not in focus, give CPU time to other apps by waiting for messages instead of 'peeking'
 736                                         SDL_ActiveEvent evt;
 737                                         SDL_WaitEvent((SDL_Event*)&evt);
 738                                         if (evt.type == SDL_ACTIVEEVENT && evt.gain == 1)
 739                                                 gameFocused = true;
 740                                         else if (evt.type == SDL_QUIT)
 741                                                 gDone = true;
 742                                 }
 743                         }
 744
 745                         regnow = game.registernow;
 746                 }
 747                 pgame = 0;
 748
 749                 CleanUp ();
 750
 751                 return 0;
 752         }
 753         catch (const std::exception& error)
 754         {
 755                 CleanUp();
 756
 757                 std::string e = "Caught exception: ";
 758                 e += error.what();
 759
 760                 LOG(e);
 761
 762                 MessageBox(g_windowHandle, error.what(), "ERROR", MB_OK | MB_ICONEXCLAMATION);
 763         }
 764
 765         CleanUp();
 766
 767         return -1;
 768 }
 769
 770
 771
 772 // --------------------------------------------------------------------------
 773
 774 extern int channels[100];
 775 extern OPENAL_STREAM * strm[20];
 776
 777 extern "C" void PlaySoundEx(int chan, OPENAL_SAMPLE *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
 778 {
 779         const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
 780         if (currSample && currSample == samp[chan])
 781         {
 782                 if (OPENAL_GetPaused(channels[chan]))
 783                 {
 784                         OPENAL_StopSound(channels[chan]);
 785                         channels[chan] = OPENAL_FREE;
 786                 }
 787                 else if (OPENAL_IsPlaying(channels[chan]))
 788                 {
 789                         int loop_mode = OPENAL_GetLoopMode(channels[chan]);
 790                         if (loop_mode & OPENAL_LOOP_OFF)
 791                         {
 792                                 channels[chan] = OPENAL_FREE;
 793                         }
 794                 }
 795         }
 796         else
 797         {
 798                 channels[chan] = OPENAL_FREE;
 799         }
 800
 801         channels[chan] = OPENAL_PlaySoundEx(channels[chan], sptr, dsp, startpaused);
 802         if (channels[chan] < 0)
 803         {
 804                 channels[chan] = OPENAL_PlaySoundEx(OPENAL_FREE, sptr, dsp, startpaused);
 805         }
 806 }
 807
 808 extern "C" void PlayStreamEx(int chan, OPENAL_STREAM *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
 809 {
 810         const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
 811         if (currSample && currSample == OPENAL_Stream_GetSample(sptr))
 812         {
 813                         OPENAL_StopSound(channels[chan]);
 814                         OPENAL_Stream_Stop(sptr);
 815         }
 816         else
 817         {
 818                 OPENAL_Stream_Stop(sptr);
 819                 channels[chan] = OPENAL_FREE;
 820         }
 821
 822         channels[chan] = OPENAL_Stream_PlayEx(channels[chan], sptr, dsp, startpaused);
 823         if (channels[chan] < 0)
 824         {
 825                 channels[chan] = OPENAL_Stream_PlayEx(OPENAL_FREE, sptr, dsp, startpaused);
 826         }
 827 }
 828
 829
 830 bool LoadImage(const char * fname, TGAImageRec & tex)
 831 {
 832         if ( tex.data == NULL )
 833                 return false;
 834         else
 835                 return load_image(fname, tex);
 836 }
 837
 838 void ScreenShot(const char * fname)
 839 {
 840
 841 }
 842
 843
 844
 845 static bool load_image(const char *file_name, TGAImageRec &tex)
 846 {
 847     const char *ptr = strrchr((char *)file_name, '.');
 848     if (ptr)
 849     {
 850         if (strcasecmp(ptr+1, "png") == 0)
 851             return load_png(file_name, tex);
 852         else if (strcasecmp(ptr+1, "jpg") == 0)
 853             return load_jpg(file_name, tex);
 854     }
 855
 856     STUBBED("Unsupported image type");
 857     return false;
 858 }
 859
 860
 861 struct my_error_mgr {
 862   struct jpeg_error_mgr pub;    /* "public" fields */
 863   jmp_buf setjmp_buffer;        /* for return to caller */
 864 };
 865 typedef struct my_error_mgr * my_error_ptr;
 866
 867
 868 static void my_error_exit(j_common_ptr cinfo)
 869 {
 870         struct my_error_mgr *err = (struct my_error_mgr *)cinfo->err;
 871         longjmp(err->setjmp_buffer, 1);
 872 }
 873
 874 /* stolen from public domain example.c code in libjpg distribution. */
 875 static bool load_jpg(const char *file_name, TGAImageRec &tex)
 876 {
 877     struct jpeg_decompress_struct cinfo;
 878     struct my_error_mgr jerr;
 879     JSAMPROW buffer[1];         /* Output row buffer */
 880     int row_stride;             /* physical row width in output buffer */
 881     FILE *infile = fopen(file_name, "rb");
 882
 883     if (infile == NULL)
 884         return false;
 885
 886     cinfo.err = jpeg_std_error(&jerr.pub);
 887     jerr.pub.error_exit = my_error_exit;
 888     if (setjmp(jerr.setjmp_buffer)) {
 889         jpeg_destroy_decompress(&cinfo);
 890         fclose(infile);
 891         return false;
 892     }
 893
 894     jpeg_create_decompress(&cinfo);
 895     jpeg_stdio_src(&cinfo, infile);
 896     (void) jpeg_read_header(&cinfo, TRUE);
 897
 898     cinfo.out_color_space = JCS_RGB;
 899     cinfo.quantize_colors = 0;
 900     (void) jpeg_calc_output_dimensions(&cinfo);
 901     (void) jpeg_start_decompress(&cinfo);
 902
 903     row_stride = cinfo.output_width * cinfo.output_components;
 904     tex.sizeX = cinfo.output_width;
 905     tex.sizeY = cinfo.output_height;
 906     tex.bpp = 24;
 907
 908     while (cinfo.output_scanline < cinfo.output_height) {
 909         buffer[0] = (JSAMPROW)(char *)tex.data +
 910                         ((cinfo.output_height-1) - cinfo.output_scanline) * row_stride;
 911         (void) jpeg_read_scanlines(&cinfo, buffer, 1);
 912     }
 913
 914     (void) jpeg_finish_decompress(&cinfo);
 915     jpeg_destroy_decompress(&cinfo);
 916     fclose(infile);
 917
 918     return true;
 919 }
 920
 921
 922 /* stolen from public domain example.c code in libpng distribution. */
 923 static bool load_png(const char *file_name, TGAImageRec &tex)
 924 {
 925     bool hasalpha = false;
 926     png_structp png_ptr = NULL;
 927     png_infop info_ptr = NULL;
 928     png_uint_32 width, height;
 929     int bit_depth, color_type, interlace_type;
 930     png_byte **rows = NULL;
 931     bool retval = false;
 932     png_byte **row_pointers = NULL;
 933     FILE *fp = fopen(file_name, "rb");
 934
 935     if (fp == NULL)
 936         return(NULL);
 937
 938     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
 939     if (png_ptr == NULL)
 940         goto png_done;
 941
 942     info_ptr = png_create_info_struct(png_ptr);
 943     if (info_ptr == NULL)
 944         goto png_done;
 945
 946     if (setjmp(png_jmpbuf(png_ptr)))
 947         goto png_done;
 948
 949     png_init_io(png_ptr, fp);
 950     png_read_png(png_ptr, info_ptr,
 951                  PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING,
 952                  NULL);
 953     png_get_IHDR(png_ptr, info_ptr, &width, &height,
 954                  &bit_depth, &color_type, &interlace_type, NULL, NULL);
 955
 956     if (bit_depth != 8)  // transform SHOULD handle this...
 957         goto png_done;
 958
 959     if (color_type & PNG_COLOR_MASK_PALETTE)  // !!! FIXME?
 960         goto png_done;
 961
 962     if ((color_type & PNG_COLOR_MASK_COLOR) == 0)  // !!! FIXME?
 963         goto png_done;
 964
 965     hasalpha = ((color_type & PNG_COLOR_MASK_ALPHA) != 0);
 966     row_pointers = png_get_rows(png_ptr, info_ptr);
 967     if (!row_pointers)
 968         goto png_done;
 969
 970     if (!hasalpha)
 971     {
 972         png_byte *dst = tex.data;
 973         for (int i = height-1; i >= 0; i--)
 974         {
 975             png_byte *src = row_pointers[i];
 976             for (int j = 0; j < width; j++)
 977             {
 978                 dst[0] = src[0];
 979                 dst[1] = src[1];
 980                 dst[2] = src[2];
 981                 dst[3] = 0xFF;
 982                 src += 3;
 983                 dst += 4;
 984             }
 985         }
 986     }
 987
 988     else
 989     {
 990         png_byte *dst = tex.data;
 991         int pitch = width * 4;
 992         for (int i = height-1; i >= 0; i--, dst += pitch)
 993             memcpy(dst, row_pointers[i], pitch);
 994     }
 995
 996     tex.sizeX = width;
 997     tex.sizeY = height;
 998     tex.bpp = 32;
 999     retval = true;
1000
1001 png_done:
1002     png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
1003     if (fp)
1004         fclose(fp);
1005     return (retval);
1006 }
1007
1008
1009 bool save_image(const char *file_name)
1010 {
1011     const char *ptr = strrchr((char *)file_name, '.');
1012     if (ptr)
1013     {
1014         if (strcasecmp(ptr+1, "png") == 0)
1015             return save_png(file_name);
1016     }
1017
1018     STUBBED("Unsupported image type");
1019     return false;
1020 }
1021
1022
1023 static bool save_png(const char *file_name)
1024 {
1025     FILE *fp = NULL;
1026     png_structp png_ptr = NULL;
1027     png_infop info_ptr = NULL;
1028     bool retval = false;
1029
1030     fp = fopen(file_name, "wb");
1031     if (fp == NULL)
1032         return false;
1033
1034     png_bytep *row_pointers = new png_bytep[kContextHeight];
1035     png_bytep screenshot = new png_byte[kContextWidth * kContextHeight * 3];
1036     if ((!screenshot) || (!row_pointers))
1037         goto save_png_done;
1038
1039     glGetError();
1040     glReadPixels(0, 0, kContextWidth, kContextHeight,
1041                  GL_RGB, GL_UNSIGNED_BYTE, screenshot);
1042     if (glGetError() != GL_NO_ERROR)
1043         goto save_png_done;
1044
1045     for (int i = 0; i < kContextHeight; i++)
1046         row_pointers[i] = screenshot + ((kContextWidth * ((kContextHeight-1) - i)) * 3);
1047
1048     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1049     if (png_ptr == NULL)
1050         goto save_png_done;
1051
1052     info_ptr = png_create_info_struct(png_ptr);
1053     if (info_ptr == NULL)
1054         goto save_png_done;
1055
1056     if (setjmp(png_jmpbuf(png_ptr)))
1057         goto save_png_done;
1058
1059     png_init_io(png_ptr, fp);
1060
1061     if (setjmp(png_jmpbuf(png_ptr)))
1062         goto save_png_done;
1063
1064     png_set_IHDR(png_ptr, info_ptr, kContextWidth, kContextHeight,
1065                  8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
1066                  PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
1067
1068     png_write_info(png_ptr, info_ptr);
1069
1070     if (setjmp(png_jmpbuf(png_ptr)))
1071         goto save_png_done;
1072
1073         png_write_image(png_ptr, row_pointers);
1074
1075         if (setjmp(png_jmpbuf(png_ptr)))
1076         goto save_png_done;
1077
1078     png_write_end(png_ptr, NULL);
1079     retval = true;
1080
1081 save_png_done:
1082     png_destroy_write_struct(&png_ptr, &info_ptr);
1083     delete[] screenshot;
1084     delete[] row_pointers;
1085     if (fp)
1086         fclose(fp);
1087     if (!retval)
1088         unlink(ConvertFileName(file_name));
1089     return retval;
1090 }
1091
1092
1093