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