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