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 static 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 // MODIFIED GWC
  70 //extern int terraindetail;
  71 //extern int texdetail;
  72 extern float terraindetail;
  73 extern float texdetail;
  74
  75 extern bool osx;
  76 extern int numplayers;
  77 extern bool freeze;
  78 extern Person player[maxplayers];
  79 extern bool stillloading;
  80 extern int mainmenu;
  81 /*extern*/ bool gameFocused;
  82
  83 extern float slomospeed;
  84 extern float slomofreq;
  85
  86
  87
  88 #include <math.h>
  89 #include <stdio.h>
  90 #include <string.h>
  91 #include <fstream>
  92 #include <iostream>
  93 #include "gamegl.h"
  94 #include "MacCompatibility.h"
  95 #include "Settings.h"
  96
  97 #ifdef WIN32
  98 #include <shellapi.h>
  99 #include "win-res/resource.h"
 100 #endif
 101
 102 using namespace std;
 103
 104
 105
 106 SDL_Rect **resolutions = NULL;
 107 static SDL_Rect rect_1024_768 = { 0, 0, 1024, 768 };
 108 static SDL_Rect rect_800_600  = { 0, 0, 800,  600 };
 109 static SDL_Rect rect_640_480  = { 0, 0, 640,  480 };
 110 static SDL_Rect *hardcoded_resolutions[] = {
 111     &rect_1024_768,
 112     &rect_800_600,
 113     &rect_640_480,
 114     NULL
 115 };
 116
 117
 118
 119 unsigned int resolutionDepths[8][2] = {0};
 120
 121 int closestResolution(int width, int height);
 122 int resolutionID(int width, int height);
 123
 124 void ReportError (char * strError);
 125
 126 void DrawGL(Game & game);
 127
 128 void CreateGLWindow (void);
 129 Boolean SetUp (Game & game);
 130 void DoUpdate (Game & game);
 131
 132 void DoEvent (void);
 133 void CleanUp (void);
 134
 135
 136 // statics/globals (internal only) ------------------------------------------
 137 #ifndef WIN32
 138 typedef struct tagPOINT {
 139   int x;
 140   int y;
 141 } POINT, *PPOINT;
 142 #endif
 143
 144
 145
 146 #ifdef _MSC_VER
 147 #pragma warning(push)
 148 #pragma warning(disable: 4273)
 149 #endif
 150
 151 #define GL_FUNC(ret,fn,params,call,rt) \
 152     extern "C" { \
 153         static ret (GLAPIENTRY *p##fn) params = NULL; \
 154         ret GLAPIENTRY fn params { rt p##fn call; } \
 155     }
 156 #include "glstubs.h"
 157 #undef GL_FUNC
 158
 159 #ifdef _MSC_VER
 160 #pragma warning(pop)
 161 #endif
 162
 163 static bool lookup_glsym(const char *funcname, void **func)
 164 {
 165     *func = SDL_GL_GetProcAddress(funcname);
 166     if (*func == NULL)
 167     {
 168         fprintf(stderr, "Failed to find OpenGL symbol \"%s\"\n", funcname);
 169         return false;
 170     }
 171     return true;
 172 }
 173
 174 static bool lookup_all_glsyms(void)
 175 {
 176     bool retval = true;
 177     #define GL_FUNC(ret,fn,params,call,rt) \
 178         if (!lookup_glsym(#fn, (void **) &p##fn)) retval = false;
 179     #include "glstubs.h"
 180     #undef GL_FUNC
 181     return retval;
 182 }
 183
 184 static void GLAPIENTRY glDeleteTextures_doNothing(GLsizei n, const GLuint *textures)
 185 {
 186     // no-op.
 187 }
 188
 189
 190
 191 void sdlGetCursorPos(POINT *pt)
 192 {
 193     SDL_GetMouseState(&(pt->x), &(pt->y));
 194 }
 195 #define GetCursorPos(x) sdlGetCursorPos(x)
 196 #define SetCursorPos(x, y) SDL_WarpMouse(x, y)
 197 #define ScreenToClient(x, pt)
 198 #define ClientToScreen(x, pt)
 199 #ifdef MessageBox
 200 #undef MessageBox
 201 #endif
 202 #define MessageBox(hwnd,text,title,flags) STUBBED("msgbox")
 203
 204
 205 Point delta;
 206
 207 static bool g_button, fullscreen = true;
 208
 209
 210 // Menu defs
 211 enum
 212 {
 213         kFileQuit = 1
 214 };
 215
 216 enum
 217 {
 218         kForegroundSleep = 10,
 219         kBackgroundSleep = 10000
 220 };
 221
 222
 223 int kContextWidth;
 224 int kContextHeight;
 225
 226 const RGBColor rgbBlack = { 0x0000, 0x0000, 0x0000 };
 227
 228 GLuint gFontList;
 229 char gcstrMode [256] = "";
 230
 231 UInt32 gSleepTime = kForegroundSleep;
 232 Boolean gDone = false, gfFrontProcess = true;
 233
 234 Game * pgame = 0;
 235
 236 #ifndef __MINGW32__
 237 static int _argc = 0;
 238 static char **_argv = NULL;
 239 #endif
 240
 241 bool cmdline(const char *cmd)
 242 {
 243     for (int i = 1; i < _argc; i++)
 244     {
 245         char *arg = _argv[i];
 246         while (*arg == '-')
 247             arg++;
 248         if (strcasecmp(arg, cmd) == 0)
 249             return true;
 250     }
 251
 252     return false;
 253 }
 254
 255
 256 // --------------------------------------------------------------------------
 257
 258 void ReportError (char * strError)
 259 {
 260 #ifdef _MSC_VER  // !!! FIXME.  --ryan.
 261         throw std::exception( strError);
 262 #endif
 263
 264         /*      char errMsgCStr [256];
 265         Str255 strErr;
 266
 267         sprintf (errMsgCStr, "%s", strError);
 268
 269         // out as debug string
 270         CToPStr (strErr, errMsgCStr);
 271         DebugStr (strErr);
 272         */
 273 }
 274
 275 //-----------------------------------------------------------------------------------------------------------------------
 276
 277 // OpenGL Drawing
 278
 279 void DrawGL (Game & game)
 280 {
 281         if ( stereomode == stereoNone ) {
 282                 game.DrawGLScene(stereoCenter);
 283         } else {
 284                 game.DrawGLScene(stereoLeft);
 285                 game.DrawGLScene(stereoRight);
 286         }
 287 }
 288
 289 static inline int clamp_sdl_mouse_button(Uint8 button)
 290 {
 291     if (button == 2)   // right mouse button is button 3 in SDL.
 292         button = 3;
 293     else if (button == 3)
 294         button = 2;
 295
 296     if ((button >= 1) && (button <= 3))
 297         return button - 1;
 298     return -1;
 299 }
 300
 301 static void sdlEventProc(const SDL_Event &e, Game &game)
 302 {
 303     int val;
 304     SDLMod mod;
 305
 306     switch(e.type)
 307         {
 308         case SDL_MOUSEMOTION:
 309             game.deltah += e.motion.xrel;
 310             game.deltav += e.motion.yrel;
 311             return;
 312
 313         case SDL_KEYDOWN:
 314             if ((e.key.keysym.sym == SDLK_g) &&
 315                                 (e.key.keysym.mod & KMOD_CTRL) &&
 316                                 !(SDL_GetVideoSurface()->flags & SDL_FULLSCREEN) ) {
 317                                 SDL_WM_GrabInput( ((SDL_WM_GrabInput(SDL_GRAB_QUERY)==SDL_GRAB_ON) ? SDL_GRAB_OFF:SDL_GRAB_ON) );
 318                         } else if ( (e.key.keysym.sym == SDLK_RETURN) && (e.key.keysym.mod & KMOD_ALT) ) {
 319                                 SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
 320             }
 321             return;
 322
 323         case SDL_KEYUP:
 324             return;
 325     }
 326 }
 327
 328
 329 // --------------------------------------------------------------------------
 330
 331 static Point gMidPoint;
 332
 333 Boolean SetUp (Game & game)
 334 {
 335         char string[10];
 336
 337         LOGFUNC;
 338
 339         randSeed = UpTime().lo;
 340
 341         osx = 0;
 342         cellophane=0;
 343         texdetail=4;
 344         terraindetail=2;
 345         slomospeed=0.25;
 346         slomofreq=8012;
 347         numplayers=1;
 348
 349         DefaultSettings(game);
 350
 351     if (!SDL_WasInit(SDL_INIT_VIDEO))
 352         if (SDL_Init(SDL_INIT_VIDEO) == -1)
 353         {
 354             fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError());
 355             return false;
 356         }
 357         if(!LoadSettings(game)) {
 358                 fprintf(stderr, "Failed to load config, creating default\n");
 359                 SaveSettings(game);
 360         }
 361         if(kBitsPerPixel!=32&&kBitsPerPixel!=16){
 362                 kBitsPerPixel=16;
 363         }
 364
 365         if (SDL_GL_LoadLibrary(NULL) == -1)
 366         {
 367                 fprintf(stderr, "SDL_GL_LoadLibrary() failed: %s\n", SDL_GetError());
 368                 SDL_Quit();
 369                 return false;
 370         }
 371
 372         SDL_Rect **res = SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_OPENGL);
 373         if ( (res == NULL) || (res == ((SDL_Rect **)-1)) || (res[0] == NULL) || (res[0]->w < 640) || (res[0]->h < 480) )
 374                 res = hardcoded_resolutions;
 375
 376         // reverse list (it was sorted biggest to smallest by SDL)...
 377         int count;
 378         for (count = 0; res[count]; count++)
 379         {
 380                 if ((res[count]->w < 640) || (res[count]->h < 480))
 381                         break;   // sane lower limit.
 382         }
 383
 384         static SDL_Rect *resolutions_block = NULL;
 385         resolutions_block = (SDL_Rect*) realloc(resolutions_block, sizeof (SDL_Rect) * count);
 386         resolutions = (SDL_Rect**) realloc(resolutions, sizeof (SDL_Rect *) * (count + 1));
 387         if ((resolutions_block == NULL) || (resolutions == NULL))
 388         {
 389                 SDL_Quit();
 390                 fprintf(stderr, "Out of memory!\n");
 391                 return false;
 392         }
 393
 394         resolutions[count--] = NULL;
 395         for (int i = 0; count >= 0; i++, count--)
 396         {
 397                 memcpy(&resolutions_block[count], res[i], sizeof (SDL_Rect));
 398                 resolutions[count] = &resolutions_block[count];
 399         }
 400
 401         if (cmdline("showresolutions"))
 402         {
 403                 printf("Resolutions we think are okay:\n");
 404                 for (int i = 0; resolutions[i]; i++)
 405                         printf("  %d x %d\n", (int) resolutions[i]->w, (int) resolutions[i]->h);
 406         }
 407
 408     Uint32 sdlflags = SDL_OPENGL;
 409     if (!cmdline("windowed"))
 410         sdlflags |= SDL_FULLSCREEN;
 411
 412     SDL_WM_SetCaption("Lugaru", "Lugaru");
 413
 414     SDL_ShowCursor(0);
 415
 416     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 417     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
 418
 419     if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 420     {
 421         fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 422         fprintf(stderr, "forcing 640x480...\n");
 423         kContextWidth = 640;
 424         kContextHeight = 480;
 425         if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 426         {
 427             fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 428             fprintf(stderr, "forcing 640x480 windowed mode...\n");
 429             sdlflags &= ~SDL_FULLSCREEN;
 430             if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 431             {
 432                 fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 433                 return false;
 434             }
 435         }
 436     }
 437
 438     int dblbuf = 0;
 439     if ((SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &dblbuf) == -1) || (!dblbuf))
 440     {
 441         fprintf(stderr, "Failed to get double buffered GL context!\n");
 442         SDL_Quit();
 443         return false;
 444     }
 445
 446     if (!lookup_all_glsyms())
 447     {
 448         SDL_Quit();
 449         return false;
 450     }
 451
 452     if (!cmdline("nomousegrab"))
 453         SDL_WM_GrabInput(SDL_GRAB_ON);
 454
 455
 456         glClear( GL_COLOR_BUFFER_BIT );
 457         swap_gl_buffers();
 458
 459         // clear all states
 460         glDisable( GL_ALPHA_TEST);
 461         glDisable( GL_BLEND);
 462         glDisable( GL_DEPTH_TEST);
 463         //      glDisable( GL_DITHER);
 464         glDisable( GL_FOG);
 465         glDisable( GL_LIGHTING);
 466         glDisable( GL_LOGIC_OP);
 467         glDisable( GL_TEXTURE_1D);
 468         glDisable( GL_TEXTURE_2D);
 469         glPixelTransferi( GL_MAP_COLOR, GL_FALSE);
 470         glPixelTransferi( GL_RED_SCALE, 1);
 471         glPixelTransferi( GL_RED_BIAS, 0);
 472         glPixelTransferi( GL_GREEN_SCALE, 1);
 473         glPixelTransferi( GL_GREEN_BIAS, 0);
 474         glPixelTransferi( GL_BLUE_SCALE, 1);
 475         glPixelTransferi( GL_BLUE_BIAS, 0);
 476         glPixelTransferi( GL_ALPHA_SCALE, 1);
 477         glPixelTransferi( GL_ALPHA_BIAS, 0);
 478
 479         // set initial rendering states
 480         glShadeModel( GL_SMOOTH);
 481         glClearDepth( 1.0f);
 482         glDepthFunc( GL_LEQUAL);
 483         glDepthMask( GL_TRUE);
 484         //      glDepthRange( FRONT_CLIP, BACK_CLIP);
 485         glEnable( GL_DEPTH_TEST);
 486         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 487         glCullFace( GL_FRONT);
 488         glEnable( GL_CULL_FACE);
 489         glEnable( GL_LIGHTING);
 490 //      glEnable( GL_LIGHT_MODEL_AMBIENT);
 491         glEnable( GL_DITHER);
 492         glEnable( GL_COLOR_MATERIAL);
 493         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 494         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 495         glAlphaFunc( GL_GREATER, 0.5f);
 496
 497         GLint width = kContextWidth;
 498         GLint height = kContextHeight;
 499         gMidPoint.h = width / 2;
 500         gMidPoint.v = height / 2;
 501         screenwidth=width;
 502         screenheight=height;
 503
 504         game.newdetail=detail;
 505         game.newscreenwidth=screenwidth;
 506         game.newscreenheight=screenheight;
 507
 508         if ( CanInitStereo(stereomode) ) {
 509                 InitStereo(stereomode);
 510         } else {
 511                 fprintf(stderr, "Failed to initialize stereo, disabling.\n");
 512                 stereomode = stereoNone;
 513         }
 514
 515         game.InitGame();
 516
 517         return true;
 518 }
 519
 520
 521 static void DoMouse(Game & game)
 522 {
 523
 524         if(mainmenu||(abs(game.deltah)<10*realmultiplier*1000&&abs(game.deltav)<10*realmultiplier*1000))
 525         {
 526                 game.deltah *= usermousesensitivity;
 527                 game.deltav *= usermousesensitivity;
 528                 game.mousecoordh += game.deltah;
 529                 game.mousecoordv += game.deltav;
 530         if (game.mousecoordh < 0)
 531             game.mousecoordh = 0;
 532         else if (game.mousecoordh >= kContextWidth)
 533             game.mousecoordh = kContextWidth - 1;
 534         if (game.mousecoordv < 0)
 535             game.mousecoordv = 0;
 536         else if (game.mousecoordv >= kContextHeight)
 537             game.mousecoordv = kContextHeight - 1;
 538         }
 539
 540 }
 541
 542 void DoFrameRate (int update)
 543 {
 544         static long frames = 0;
 545
 546         static AbsoluteTime time = {0,0};
 547         static AbsoluteTime frametime = {0,0};
 548         AbsoluteTime currTime = UpTime ();
 549         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, frametime);
 550
 551         if (0 > deltaTime)      // if negative microseconds
 552                 deltaTime /= -1000000.0;
 553         else                            // else milliseconds
 554                 deltaTime /= 1000.0;
 555
 556         multiplier=deltaTime;
 557         if(multiplier<.001) multiplier=.001;
 558         if(multiplier>10) multiplier=10;
 559         if(update) frametime = currTime;        // reset for next time interval
 560
 561         deltaTime = (float) AbsoluteDeltaToDuration (currTime, time);
 562
 563         if (0 > deltaTime)      // if negative microseconds
 564                 deltaTime /= -1000000.0;
 565         else                            // else milliseconds
 566                 deltaTime /= 1000.0;
 567         frames++;
 568         if (0.001 <= deltaTime) // has update interval passed
 569         {
 570                 if(update){
 571                         time = currTime;        // reset for next time interval
 572                         frames = 0;
 573                 }
 574         }
 575 }
 576
 577
 578 void DoUpdate (Game & game)
 579 {
 580         static float sps=200;
 581         static int count;
 582         static float oldmult;
 583
 584         DoFrameRate(1);
 585         if(multiplier>.6)multiplier=.6;
 586
 587         game.fps=1/multiplier;
 588
 589         count = multiplier*sps;
 590         if(count<2)count=2;
 591         //if(count>10)count=10;
 592
 593         realmultiplier=multiplier;
 594         multiplier*=gamespeed;
 595         if(difficulty==1)multiplier*=.9;
 596         if(difficulty==0)multiplier*=.8;
 597
 598         if(game.loading==4)multiplier*=.00001;
 599         //multiplier*.9;
 600         if(slomo&&!mainmenu)multiplier*=slomospeed;
 601         //if(freeze)multiplier*=0.00001;
 602         oldmult=multiplier;
 603         multiplier/=(float)count;
 604
 605         DoMouse(game);
 606
 607         game.TickOnce();
 608
 609         for(int i=0;i<count;i++)
 610         {
 611                 game.Tick();
 612         }
 613         multiplier=oldmult;
 614
 615         game.TickOnceAfter();
 616 /* - Debug code to test how many channels were active on average per frame
 617         static long frames = 0;
 618
 619         static AbsoluteTime start = {0,0};
 620         AbsoluteTime currTime = UpTime ();
 621         static int num_channels = 0;
 622
 623         num_channels += OPENAL_GetChannelsPlaying();
 624         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, start);
 625
 626         if (0 > deltaTime)      // if negative microseconds
 627                 deltaTime /= -1000000.0;
 628         else                            // else milliseconds
 629                 deltaTime /= 1000.0;
 630
 631         ++frames;
 632
 633         if (deltaTime >= 1)
 634         {
 635                 start = currTime;
 636                 float avg_channels = (float)num_channels / (float)frames;
 637
 638                 ofstream opstream("log.txt",ios::app);
 639                 opstream << "Average frame count: ";
 640                 opstream << frames;
 641                 opstream << " frames - ";
 642                 opstream << avg_channels;
 643                 opstream << " per frame.\n";
 644                 opstream.close();
 645
 646                 frames = 0;
 647                 num_channels = 0;
 648         }
 649 */
 650         DrawGL (game);
 651 }
 652
 653 // --------------------------------------------------------------------------
 654
 655
 656 void CleanUp (void)
 657 {
 658         LOGFUNC;
 659
 660 //      game.Dispose();
 661
 662
 663
 664
 665     SDL_Quit();
 666     #define GL_FUNC(ret,fn,params,call,rt) p##fn = NULL;
 667     #include "glstubs.h"
 668     #undef GL_FUNC
 669     // cheat here...static destructors are calling glDeleteTexture() after
 670     //  the context is destroyed and libGL unloaded by SDL_Quit().
 671     pglDeleteTextures = glDeleteTextures_doNothing;
 672
 673 }
 674
 675 // --------------------------------------------------------------------------
 676
 677 static bool IsFocused()
 678 {
 679     return ((SDL_GetAppState() & SDL_APPINPUTFOCUS) != 0);
 680 }
 681
 682
 683 static void launch_web_browser(const char *url)
 684 {
 685 #ifdef WIN32
 686     ShellExecute(NULL, "open", url, NULL, NULL, SW_SHOWNORMAL);
 687
 688 #elif (defined(__APPLE__) && defined(__MACH__))
 689     const char *fmt = "open '%s'";
 690     const size_t len = strlen(fmt) + strlen(url) + 16;
 691     char *buf = new char[len];
 692     snprintf(buf, len, fmt, url);
 693     system(buf);
 694     delete[] buf;
 695
 696 #elif PLATFORM_LINUX
 697     const char *fmt = "PATH=$PATH:. xdg-open '%s'";
 698     const size_t len = strlen(fmt) + strlen(url) + 16;
 699     char *buf = new char[len];
 700     snprintf(buf, len, fmt, url);
 701     system(buf);
 702     delete[] buf;
 703 #endif
 704 }
 705
 706
 707 #ifndef WIN32
 708 // (code lifted from physfs: http://icculus.org/physfs/ ... zlib license.)
 709 static char *findBinaryInPath(const char *bin, char *envr)
 710 {
 711     size_t alloc_size = 0;
 712     char *exe = NULL;
 713     char *start = envr;
 714     char *ptr;
 715
 716     do
 717     {
 718         size_t size;
 719         ptr = strchr(start, ':');  /* find next $PATH separator. */
 720         if (ptr)
 721             *ptr = '\0';
 722
 723         size = strlen(start) + strlen(bin) + 2;
 724         if (size > alloc_size)
 725         {
 726             char *x = (char *) realloc(exe, size);
 727             if (x == NULL)
 728             {
 729                 if (exe != NULL)
 730                     free(exe);
 731                 return(NULL);
 732             } /* if */
 733
 734             alloc_size = size;
 735             exe = x;
 736         } /* if */
 737
 738         /* build full binary path... */
 739         strcpy(exe, start);
 740         if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
 741             strcat(exe, "/");
 742         strcat(exe, bin);
 743
 744         if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
 745         {
 746             strcpy(exe, start);  /* i'm lazy. piss off. */
 747             return(exe);
 748         } /* if */
 749
 750         start = ptr + 1;  /* start points to beginning of next element. */
 751     } while (ptr != NULL);
 752
 753     if (exe != NULL)
 754         free(exe);
 755
 756     return(NULL);  /* doesn't exist in path. */
 757 } /* findBinaryInPath */
 758
 759
 760 char *calcBaseDir(const char *argv0)
 761 {
 762     /* If there isn't a path on argv0, then look through the $PATH for it. */
 763     char *retval;
 764     char *envr;
 765
 766     const char *ptr = strrchr((char *)argv0, '/');
 767     if (strchr(argv0, '/'))
 768     {
 769         retval = strdup(argv0);
 770         if (retval)
 771             *((char *) strrchr(retval, '/')) = '\0';
 772         return(retval);
 773     }
 774
 775     envr = getenv("PATH");
 776     if (!envr) return NULL;
 777     envr = strdup(envr);
 778     if (!envr) return NULL;
 779     retval = findBinaryInPath(argv0, envr);
 780     free(envr);
 781     return(retval);
 782 }
 783
 784 static inline void chdirToAppPath(const char *argv0)
 785 {
 786     char *dir = calcBaseDir(argv0);
 787     if (dir)
 788     {
 789         #if (defined(__APPLE__) && defined(__MACH__))
 790         // Chop off /Contents/MacOS if it's at the end of the string, so we
 791         //  land in the base of the app bundle.
 792         const size_t len = strlen(dir);
 793         const char *bundledirs = "/Contents/MacOS";
 794         const size_t bundledirslen = strlen(bundledirs);
 795         if (len > bundledirslen)
 796         {
 797             char *ptr = (dir + len) - bundledirslen;
 798             if (strcasecmp(ptr, bundledirs) == 0)
 799                 *ptr = '\0';
 800         }
 801         #endif
 802         chdir(dir);
 803         free(dir);
 804     }
 805 }
 806 #endif
 807
 808
 809 int main(int argc, char **argv)
 810 {
 811 #ifndef __MINGW32__
 812     _argc = argc;
 813     _argv = argv;
 814 #endif
 815
 816     // !!! FIXME: we could use a Win32 API for this.  --ryan.
 817 #ifndef WIN32
 818     chdirToAppPath(argv[0]);
 819 #endif
 820
 821         LOGFUNC;
 822
 823         //memset( &g_theKeys, 0, sizeof( KeyMap));
 824
 825     //initSDLKeyTable();
 826
 827         try
 828         {
 829                 bool regnow = false;
 830                 {
 831                         Game game;
 832                         pgame = &game;
 833
 834                         //ofstream os("error.txt");
 835                         //os.close();
 836                         //ofstream os("log.txt");
 837                         //os.close();
 838
 839                         if (!SetUp (game))
 840                 return 42;
 841
 842                         while (!gDone&&!game.quit&&(!game.tryquit))
 843                         {
 844                                 if (IsFocused())
 845                                 {
 846                                         gameFocused = true;
 847
 848                                         // check windows messages
 849
 850                                         game.deltah = 0;
 851                                         game.deltav = 0;
 852                                         SDL_Event e;
 853                                         if(!game.isWaiting()) {
 854                                                 // message pump
 855                                                 while( SDL_PollEvent( &e ) )
 856                                                 {
 857                                                         if( e.type == SDL_QUIT )
 858                                                         {
 859                                                                 gDone=true;
 860                                                                 break;
 861                                                         }
 862                                                         sdlEventProc(e, game);
 863                                                 }
 864                                         }
 865
 866                                         // game
 867                                         DoUpdate(game);
 868                                 }
 869                                 else
 870                                 {
 871                                         if (gameFocused)
 872                                         {
 873                                                 // allow game chance to pause
 874                                                 gameFocused = false;
 875                                                 DoUpdate(game);
 876                                         }
 877
 878                                         // game is not in focus, give CPU time to other apps by waiting for messages instead of 'peeking'
 879                                         SDL_ActiveEvent evt;
 880                                         SDL_WaitEvent((SDL_Event*)&evt);
 881                                         if (evt.type == SDL_ACTIVEEVENT && evt.gain == 1)
 882                                                 gameFocused = true;
 883                                         else if (evt.type == SDL_QUIT)
 884                                                 gDone = true;
 885                                 }
 886                         }
 887
 888                         regnow = game.registernow;
 889                 }
 890                 pgame = 0;
 891
 892                 CleanUp ();
 893
 894                 return 0;
 895         }
 896         catch (const std::exception& error)
 897         {
 898                 CleanUp();
 899
 900                 std::string e = "Caught exception: ";
 901                 e += error.what();
 902
 903                 LOG(e);
 904
 905                 MessageBox(g_windowHandle, error.what(), "ERROR", MB_OK | MB_ICONEXCLAMATION);
 906         }
 907
 908         CleanUp();
 909
 910         return -1;
 911 }
 912
 913
 914
 915         // --------------------------------------------------------------------------
 916
 917         extern int channels[100];
 918         extern OPENAL_SAMPLE * samp[100];
 919         extern OPENAL_STREAM * strm[20];
 920
 921         extern "C" void PlaySoundEx(int chan, OPENAL_SAMPLE *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
 922         {
 923                 const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
 924                 if (currSample && currSample == samp[chan])
 925                 {
 926                         if (OPENAL_GetPaused(channels[chan]))
 927                         {
 928                                 OPENAL_StopSound(channels[chan]);
 929                                 channels[chan] = OPENAL_FREE;
 930                         }
 931                         else if (OPENAL_IsPlaying(channels[chan]))
 932                         {
 933                                 int loop_mode = OPENAL_GetLoopMode(channels[chan]);
 934                                 if (loop_mode & OPENAL_LOOP_OFF)
 935                                 {
 936                                         channels[chan] = OPENAL_FREE;
 937                                 }
 938                         }
 939                 }
 940                 else
 941                 {
 942                         channels[chan] = OPENAL_FREE;
 943                 }
 944
 945                 channels[chan] = OPENAL_PlaySoundEx(channels[chan], sptr, dsp, startpaused);
 946                 if (channels[chan] < 0)
 947                 {
 948                         channels[chan] = OPENAL_PlaySoundEx(OPENAL_FREE, sptr, dsp, startpaused);
 949                 }
 950         }
 951
 952         extern "C" void PlayStreamEx(int chan, OPENAL_STREAM *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
 953         {
 954                 const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
 955                 if (currSample && currSample == OPENAL_Stream_GetSample(sptr))
 956                 {
 957                                 OPENAL_StopSound(channels[chan]);
 958                                 OPENAL_Stream_Stop(sptr);
 959                 }
 960                 else
 961                 {
 962                         OPENAL_Stream_Stop(sptr);
 963                         channels[chan] = OPENAL_FREE;
 964                 }
 965
 966                 channels[chan] = OPENAL_Stream_PlayEx(channels[chan], sptr, dsp, startpaused);
 967                 if (channels[chan] < 0)
 968                 {
 969                         channels[chan] = OPENAL_Stream_PlayEx(OPENAL_FREE, sptr, dsp, startpaused);
 970                 }
 971         }
 972
 973
 974         bool LoadImage(const char * fname, TGAImageRec & tex)
 975         {
 976                 if ( tex.data == NULL )
 977                         return false;
 978                 else
 979                         return load_image(fname, tex);
 980         }
 981
 982         void ScreenShot(const char * fname)
 983         {
 984         save_image(fname);
 985         }
 986
 987
 988
 989 static bool load_image(const char *file_name, TGAImageRec &tex)
 990 {
 991     const char *ptr = strrchr((char *)file_name, '.');
 992     if (ptr)
 993     {
 994         if (strcasecmp(ptr+1, "png") == 0)
 995             return load_png(file_name, tex);
 996         else if (strcasecmp(ptr+1, "jpg") == 0)
 997             return load_jpg(file_name, tex);
 998     }
 999
1000     STUBBED("Unsupported image type");
1001     return false;
1002 }
1003
1004
1005 struct my_error_mgr {
1006   struct jpeg_error_mgr pub;    /* "public" fields */
1007   jmp_buf setjmp_buffer;        /* for return to caller */
1008 };
1009 typedef struct my_error_mgr * my_error_ptr;
1010
1011
1012 static void my_error_exit(j_common_ptr cinfo)
1013 {
1014         struct my_error_mgr *err = (struct my_error_mgr *)cinfo->err;
1015         longjmp(err->setjmp_buffer, 1);
1016 }
1017
1018 /* stolen from public domain example.c code in libjpg distribution. */
1019 static bool load_jpg(const char *file_name, TGAImageRec &tex)
1020 {
1021     struct jpeg_decompress_struct cinfo;
1022     struct my_error_mgr jerr;
1023     JSAMPROW buffer[1];         /* Output row buffer */
1024     int row_stride;             /* physical row width in output buffer */
1025     FILE *infile = fopen(file_name, "rb");
1026
1027     if (infile == NULL)
1028         return false;
1029
1030     cinfo.err = jpeg_std_error(&jerr.pub);
1031     jerr.pub.error_exit = my_error_exit;
1032     if (setjmp(jerr.setjmp_buffer)) {
1033         jpeg_destroy_decompress(&cinfo);
1034         fclose(infile);
1035         return false;
1036     }
1037
1038     jpeg_create_decompress(&cinfo);
1039     jpeg_stdio_src(&cinfo, infile);
1040     (void) jpeg_read_header(&cinfo, TRUE);
1041
1042     cinfo.out_color_space = JCS_RGB;
1043     cinfo.quantize_colors = 0;
1044     (void) jpeg_calc_output_dimensions(&cinfo);
1045     (void) jpeg_start_decompress(&cinfo);
1046
1047     row_stride = cinfo.output_width * cinfo.output_components;
1048     tex.sizeX = cinfo.output_width;
1049     tex.sizeY = cinfo.output_height;
1050     tex.bpp = 24;
1051
1052     while (cinfo.output_scanline < cinfo.output_height) {
1053         buffer[0] = (JSAMPROW)(char *)tex.data +
1054                         ((cinfo.output_height-1) - cinfo.output_scanline) * row_stride;
1055         (void) jpeg_read_scanlines(&cinfo, buffer, 1);
1056     }
1057
1058     (void) jpeg_finish_decompress(&cinfo);
1059     jpeg_destroy_decompress(&cinfo);
1060     fclose(infile);
1061
1062     return true;
1063 }
1064
1065
1066 /* stolen from public domain example.c code in libpng distribution. */
1067 static bool load_png(const char *file_name, TGAImageRec &tex)
1068 {
1069     bool hasalpha = false;
1070     png_structp png_ptr = NULL;
1071     png_infop info_ptr = NULL;
1072     png_uint_32 width, height;
1073     int bit_depth, color_type, interlace_type;
1074     png_byte **rows = NULL;
1075     bool retval = false;
1076     png_byte **row_pointers = NULL;
1077     FILE *fp = fopen(file_name, "rb");
1078
1079     if (fp == NULL)
1080         return(NULL);
1081
1082     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1083     if (png_ptr == NULL)
1084         goto png_done;
1085
1086     info_ptr = png_create_info_struct(png_ptr);
1087     if (info_ptr == NULL)
1088         goto png_done;
1089
1090     if (setjmp(png_jmpbuf(png_ptr)))
1091         goto png_done;
1092
1093     png_init_io(png_ptr, fp);
1094     png_read_png(png_ptr, info_ptr,
1095                  PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING,
1096                  NULL);
1097     png_get_IHDR(png_ptr, info_ptr, &width, &height,
1098                  &bit_depth, &color_type, &interlace_type, NULL, NULL);
1099
1100     if (bit_depth != 8)  // transform SHOULD handle this...
1101         goto png_done;
1102
1103     if (color_type & PNG_COLOR_MASK_PALETTE)  // !!! FIXME?
1104         goto png_done;
1105
1106     if ((color_type & PNG_COLOR_MASK_COLOR) == 0)  // !!! FIXME?
1107         goto png_done;
1108
1109     hasalpha = ((color_type & PNG_COLOR_MASK_ALPHA) != 0);
1110     row_pointers = png_get_rows(png_ptr, info_ptr);
1111     if (!row_pointers)
1112         goto png_done;
1113
1114     if (!hasalpha)
1115     {
1116         png_byte *dst = tex.data;
1117         for (int i = height-1; i >= 0; i--)
1118         {
1119             png_byte *src = row_pointers[i];
1120             for (int j = 0; j < width; j++)
1121             {
1122                 dst[0] = src[0];
1123                 dst[1] = src[1];
1124                 dst[2] = src[2];
1125                 dst[3] = 0xFF;
1126                 src += 3;
1127                 dst += 4;
1128             }
1129         }
1130     }
1131
1132     else
1133     {
1134         png_byte *dst = tex.data;
1135         int pitch = width * 4;
1136         for (int i = height-1; i >= 0; i--, dst += pitch)
1137             memcpy(dst, row_pointers[i], pitch);
1138     }
1139
1140     tex.sizeX = width;
1141     tex.sizeY = height;
1142     tex.bpp = 32;
1143     retval = true;
1144
1145 png_done:
1146     png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
1147     if (fp)
1148         fclose(fp);
1149     return (retval);
1150 }
1151
1152
1153 static bool save_image(const char *file_name)
1154 {
1155     const char *ptr = strrchr((char *)file_name, '.');
1156     if (ptr)
1157     {
1158         if (strcasecmp(ptr+1, "png") == 0)
1159             return save_png(file_name);
1160     }
1161
1162     STUBBED("Unsupported image type");
1163     return false;
1164 }
1165
1166
1167 static bool save_png(const char *file_name)
1168 {
1169     FILE *fp = NULL;
1170     png_structp png_ptr = NULL;
1171     png_infop info_ptr = NULL;
1172     bool retval = false;
1173
1174     fp = fopen(file_name, "wb");
1175     if (fp == NULL)
1176         return false;
1177
1178     png_bytep *row_pointers = new png_bytep[kContextHeight];
1179     png_bytep screenshot = new png_byte[kContextWidth * kContextHeight * 3];
1180     if ((!screenshot) || (!row_pointers))
1181         goto save_png_done;
1182
1183     glGetError();
1184     glReadPixels(0, 0, kContextWidth, kContextHeight,
1185                  GL_RGB, GL_UNSIGNED_BYTE, screenshot);
1186     if (glGetError() != GL_NO_ERROR)
1187         goto save_png_done;
1188
1189     for (int i = 0; i < kContextHeight; i++)
1190         row_pointers[i] = screenshot + ((kContextWidth * ((kContextHeight-1) - i)) * 3);
1191
1192     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1193     if (png_ptr == NULL)
1194         goto save_png_done;
1195
1196     info_ptr = png_create_info_struct(png_ptr);
1197     if (info_ptr == NULL)
1198         goto save_png_done;
1199
1200     if (setjmp(png_jmpbuf(png_ptr)))
1201         goto save_png_done;
1202
1203     png_init_io(png_ptr, fp);
1204
1205     if (setjmp(png_jmpbuf(png_ptr)))
1206         goto save_png_done;
1207
1208     png_set_IHDR(png_ptr, info_ptr, kContextWidth, kContextHeight,
1209                  8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
1210                  PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
1211
1212     png_write_info(png_ptr, info_ptr);
1213
1214     if (setjmp(png_jmpbuf(png_ptr)))
1215         goto save_png_done;
1216
1217         png_write_image(png_ptr, row_pointers);
1218
1219         if (setjmp(png_jmpbuf(png_ptr)))
1220         goto save_png_done;
1221
1222     png_write_end(png_ptr, NULL);
1223     retval = true;
1224
1225 save_png_done:
1226     png_destroy_write_struct(&png_ptr, &info_ptr);
1227     delete[] screenshot;
1228     delete[] row_pointers;
1229     if (fp)
1230         fclose(fp);
1231     if (!retval)
1232         unlink(ConvertFileName(file_name));
1233     return retval;
1234 }
1235
1236
1237