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 bool buttons[3];
  65 extern float multiplier;
  66 extern float sps;
  67 extern float realmultiplier;
  68 extern int slomo;
  69 extern bool cellophane;
  70 // MODIFIED GWC
  71 //extern int terraindetail;
  72 //extern int texdetail;
  73 extern float terraindetail;
  74 extern float texdetail;
  75
  76 extern bool osx;
  77 extern int numplayers;
  78 extern bool freeze;
  79 extern Person player[maxplayers];
  80 extern bool stillloading;
  81 extern int mainmenu;
  82 /*extern*/ bool gameFocused;
  83
  84 extern float slomospeed;
  85 extern float slomofreq;
  86
  87
  88
  89 #include <math.h>
  90 #include <stdio.h>
  91 #include <string.h>
  92 #include <fstream>
  93 #include <iostream>
  94 #include "gamegl.h"
  95 #include "MacCompatibility.h"
  96 #include "Settings.h"
  97
  98 #ifdef WIN32
  99 #include <shellapi.h>
 100 #include "win-res/resource.h"
 101 #endif
 102
 103 using namespace std;
 104
 105
 106
 107 SDL_Rect **resolutions = NULL;
 108 static SDL_Rect rect_1024_768 = { 0, 0, 1024, 768 };
 109 static SDL_Rect rect_800_600  = { 0, 0, 800,  600 };
 110 static SDL_Rect rect_640_480  = { 0, 0, 640,  480 };
 111 static SDL_Rect *hardcoded_resolutions[] = {
 112     &rect_1024_768,
 113     &rect_800_600,
 114     &rect_640_480,
 115     NULL
 116 };
 117
 118
 119
 120 unsigned int resolutionDepths[8][2] = {0};
 121
 122 int closestResolution(int width, int height);
 123 int resolutionID(int width, int height);
 124
 125 void ReportError (char * strError);
 126
 127 void DrawGL(Game & game);
 128
 129 void CreateGLWindow (void);
 130 Boolean SetUp (Game & game);
 131 void DoKey (SInt8 theKey, SInt8 theCode);
 132 void DoUpdate (Game & game);
 133
 134 void DoEvent (void);
 135 void CleanUp (void);
 136
 137
 138 // statics/globals (internal only) ------------------------------------------
 139 #ifndef WIN32
 140 typedef struct tagPOINT {
 141   int x;
 142   int y;
 143 } POINT, *PPOINT;
 144 #endif
 145
 146
 147
 148 #ifdef _MSC_VER
 149 #pragma warning(push)
 150 #pragma warning(disable: 4273)
 151 #endif
 152
 153 #define GL_FUNC(ret,fn,params,call,rt) \
 154     extern "C" { \
 155         static ret (GLAPIENTRY *p##fn) params = NULL; \
 156         ret GLAPIENTRY fn params { rt p##fn call; } \
 157     }
 158 #include "glstubs.h"
 159 #undef GL_FUNC
 160
 161 #ifdef _MSC_VER
 162 #pragma warning(pop)
 163 #endif
 164
 165 static bool lookup_glsym(const char *funcname, void **func)
 166 {
 167     *func = SDL_GL_GetProcAddress(funcname);
 168     if (*func == NULL)
 169     {
 170         fprintf(stderr, "Failed to find OpenGL symbol \"%s\"\n", funcname);
 171         return false;
 172     }
 173     return true;
 174 }
 175
 176 static bool lookup_all_glsyms(void)
 177 {
 178     bool retval = true;
 179     #define GL_FUNC(ret,fn,params,call,rt) \
 180         if (!lookup_glsym(#fn, (void **) &p##fn)) retval = false;
 181     #include "glstubs.h"
 182     #undef GL_FUNC
 183     return retval;
 184 }
 185
 186 static void GLAPIENTRY glDeleteTextures_doNothing(GLsizei n, const GLuint *textures)
 187 {
 188     // no-op.
 189 }
 190
 191
 192
 193 void sdlGetCursorPos(POINT *pt)
 194 {
 195     SDL_GetMouseState(&(pt->x), &(pt->y));
 196 }
 197 #define GetCursorPos(x) sdlGetCursorPos(x)
 198 #define SetCursorPos(x, y) SDL_WarpMouse(x, y)
 199 #define ScreenToClient(x, pt)
 200 #define ClientToScreen(x, pt)
 201 #ifdef MessageBox
 202 #undef MessageBox
 203 #endif
 204 #define MessageBox(hwnd,text,title,flags) STUBBED("msgbox")
 205
 206
 207 Point delta;
 208
 209 static bool g_button, fullscreen = true;
 210
 211
 212 // Menu defs
 213 enum
 214 {
 215         kFileQuit = 1
 216 };
 217
 218 enum
 219 {
 220         kForegroundSleep = 10,
 221         kBackgroundSleep = 10000
 222 };
 223
 224
 225 int kContextWidth;
 226 int kContextHeight;
 227
 228 const RGBColor rgbBlack = { 0x0000, 0x0000, 0x0000 };
 229
 230 GLuint gFontList;
 231 char gcstrMode [256] = "";
 232
 233 UInt32 gSleepTime = kForegroundSleep;
 234 Boolean gDone = false, gfFrontProcess = true;
 235
 236 Game * pgame = 0;
 237
 238 #ifndef __MINGW32__
 239 static int _argc = 0;
 240 static char **_argv = NULL;
 241 #endif
 242
 243 bool cmdline(const char *cmd)
 244 {
 245     for (int i = 1; i < _argc; i++)
 246     {
 247         char *arg = _argv[i];
 248         while (*arg == '-')
 249             arg++;
 250         if (strcasecmp(arg, cmd) == 0)
 251             return true;
 252     }
 253
 254     return false;
 255 }
 256
 257
 258 // --------------------------------------------------------------------------
 259
 260 void ReportError (char * strError)
 261 {
 262 #ifdef _MSC_VER  // !!! FIXME.  --ryan.
 263         throw std::exception( strError);
 264 #endif
 265
 266         /*      char errMsgCStr [256];
 267         Str255 strErr;
 268
 269         sprintf (errMsgCStr, "%s", strError);
 270
 271         // out as debug string
 272         CToPStr (strErr, errMsgCStr);
 273         DebugStr (strErr);
 274         */
 275 }
 276
 277 //-----------------------------------------------------------------------------------------------------------------------
 278
 279 // OpenGL Drawing
 280
 281 void DrawGL (Game & game)
 282 {
 283         if ( stereomode == stereoNone ) {
 284                 game.DrawGLScene(stereoCenter);
 285         } else {
 286                 game.DrawGLScene(stereoLeft);
 287                 game.DrawGLScene(stereoRight);
 288         }
 289 }
 290
 291
 292 static KeyMap g_theKeys;
 293
 294 void SetKey( int key)
 295 {
 296     g_theKeys[ key >> 3] |= (1 << (key & 7));
 297 }
 298
 299 void ClearKey( int key)
 300 {
 301     g_theKeys[ key >> 3] &= (0xff ^ (1 << (key & 7)));
 302 }
 303
 304 void GetKeys(  unsigned char theKeys[16])
 305 {
 306     memcpy( theKeys, &g_theKeys, 16);
 307 }
 308
 309 Boolean Button()
 310 {
 311     return g_button;
 312 }
 313
 314
 315 #define MAX_SDLKEYS SDLK_LAST
 316 static unsigned short KeyTable[MAX_SDLKEYS];
 317
 318 static void initSDLKeyTable(void)
 319 {
 320     memset(KeyTable, 0xFF, sizeof (KeyTable));
 321     KeyTable[SDLK_BACKSPACE] = MAC_DELETE_KEY;
 322     KeyTable[SDLK_TAB] = MAC_TAB_KEY;
 323     KeyTable[SDLK_RETURN] = MAC_RETURN_KEY;
 324     KeyTable[SDLK_ESCAPE] = MAC_ESCAPE_KEY;
 325     KeyTable[SDLK_SPACE] = MAC_SPACE_KEY;
 326     KeyTable[SDLK_PAGEUP] = MAC_PAGE_UP_KEY;
 327     KeyTable[SDLK_PAGEDOWN] = MAC_PAGE_DOWN_KEY;
 328     KeyTable[SDLK_END] = MAC_END_KEY;
 329     KeyTable[SDLK_HOME] = MAC_HOME_KEY;
 330     KeyTable[SDLK_LEFT] = MAC_ARROW_LEFT_KEY;
 331     KeyTable[SDLK_UP] = MAC_ARROW_UP_KEY;
 332     KeyTable[SDLK_RIGHT] = MAC_ARROW_RIGHT_KEY;
 333     KeyTable[SDLK_DOWN] = MAC_ARROW_DOWN_KEY;
 334     KeyTable[SDLK_INSERT] = MAC_INSERT_KEY;
 335     KeyTable[SDLK_DELETE] = MAC_DEL_KEY;
 336     KeyTable[SDLK_0] = MAC_0_KEY;
 337     KeyTable[SDLK_1] = MAC_1_KEY;
 338     KeyTable[SDLK_2] = MAC_2_KEY;
 339     KeyTable[SDLK_3] = MAC_3_KEY;
 340     KeyTable[SDLK_4] = MAC_4_KEY;
 341     KeyTable[SDLK_5] = MAC_5_KEY;
 342     KeyTable[SDLK_6] = MAC_6_KEY;
 343     KeyTable[SDLK_7] = MAC_7_KEY;
 344     KeyTable[SDLK_8] = MAC_8_KEY;
 345     KeyTable[SDLK_9] = MAC_9_KEY;
 346     KeyTable[SDLK_a] = MAC_A_KEY;
 347     KeyTable[SDLK_b] = MAC_B_KEY;
 348     KeyTable[SDLK_c] = MAC_C_KEY;
 349     KeyTable[SDLK_d] = MAC_D_KEY;
 350     KeyTable[SDLK_e] = MAC_E_KEY;
 351     KeyTable[SDLK_f] = MAC_F_KEY;
 352     KeyTable[SDLK_g] = MAC_G_KEY;
 353     KeyTable[SDLK_h] = MAC_H_KEY;
 354     KeyTable[SDLK_i] = MAC_I_KEY;
 355     KeyTable[SDLK_j] = MAC_J_KEY;
 356     KeyTable[SDLK_k] = MAC_K_KEY;
 357     KeyTable[SDLK_l] = MAC_L_KEY;
 358     KeyTable[SDLK_m] = MAC_M_KEY;
 359     KeyTable[SDLK_n] = MAC_N_KEY;
 360     KeyTable[SDLK_o] = MAC_O_KEY;
 361     KeyTable[SDLK_p] = MAC_P_KEY;
 362     KeyTable[SDLK_q] = MAC_Q_KEY;
 363     KeyTable[SDLK_r] = MAC_R_KEY;
 364     KeyTable[SDLK_s] = MAC_S_KEY;
 365     KeyTable[SDLK_t] = MAC_T_KEY;
 366     KeyTable[SDLK_u] = MAC_U_KEY;
 367     KeyTable[SDLK_v] = MAC_V_KEY;
 368     KeyTable[SDLK_w] = MAC_W_KEY;
 369     KeyTable[SDLK_x] = MAC_X_KEY;
 370     KeyTable[SDLK_y] = MAC_Y_KEY;
 371     KeyTable[SDLK_z] = MAC_Z_KEY;
 372     KeyTable[SDLK_KP0] = MAC_NUMPAD_0_KEY;
 373     KeyTable[SDLK_KP1] = MAC_NUMPAD_1_KEY;
 374     KeyTable[SDLK_KP2] = MAC_NUMPAD_2_KEY;
 375     KeyTable[SDLK_KP3] = MAC_NUMPAD_3_KEY;
 376     KeyTable[SDLK_KP4] = MAC_NUMPAD_4_KEY;
 377     KeyTable[SDLK_KP5] = MAC_NUMPAD_5_KEY;
 378     KeyTable[SDLK_KP6] = MAC_NUMPAD_6_KEY;
 379     KeyTable[SDLK_KP7] = MAC_NUMPAD_7_KEY;
 380     KeyTable[SDLK_KP8] = MAC_NUMPAD_8_KEY;
 381     KeyTable[SDLK_KP9] = MAC_NUMPAD_9_KEY;
 382     KeyTable[SDLK_KP_MULTIPLY] = MAC_NUMPAD_ASTERISK_KEY;
 383     KeyTable[SDLK_KP_PLUS] = MAC_NUMPAD_PLUS_KEY;
 384     KeyTable[SDLK_KP_ENTER] = MAC_NUMPAD_ENTER_KEY;
 385     KeyTable[SDLK_KP_MINUS] = MAC_NUMPAD_MINUS_KEY;
 386     KeyTable[SDLK_KP_PERIOD] = MAC_NUMPAD_PERIOD_KEY;
 387     KeyTable[SDLK_KP_DIVIDE] = MAC_NUMPAD_SLASH_KEY;
 388     KeyTable[SDLK_F1] = MAC_F1_KEY;
 389     KeyTable[SDLK_F2] = MAC_F2_KEY;
 390     KeyTable[SDLK_F3] = MAC_F3_KEY;
 391     KeyTable[SDLK_F4] = MAC_F4_KEY;
 392     KeyTable[SDLK_F5] = MAC_F5_KEY;
 393     KeyTable[SDLK_F6] = MAC_F6_KEY;
 394     KeyTable[SDLK_F7] = MAC_F7_KEY;
 395     KeyTable[SDLK_F8] = MAC_F8_KEY;
 396     KeyTable[SDLK_F9] = MAC_F9_KEY;
 397     KeyTable[SDLK_F10] = MAC_F10_KEY;
 398     KeyTable[SDLK_F11] = MAC_F11_KEY;
 399     KeyTable[SDLK_F12] = MAC_F12_KEY;
 400     KeyTable[SDLK_SEMICOLON] = MAC_SEMICOLON_KEY;
 401     KeyTable[SDLK_PLUS] = MAC_PLUS_KEY;
 402     KeyTable[SDLK_COMMA] = MAC_COMMA_KEY;
 403     KeyTable[SDLK_MINUS] = MAC_MINUS_KEY;
 404     KeyTable[SDLK_PERIOD] = MAC_PERIOD_KEY;
 405     KeyTable[SDLK_SLASH] = MAC_SLASH_KEY;
 406     KeyTable[SDLK_BACKQUOTE] = MAC_TILDE_KEY;
 407     KeyTable[SDLK_LEFTBRACKET] = MAC_LEFTBRACKET_KEY;
 408     KeyTable[SDLK_BACKSLASH] = MAC_BACKSLASH_KEY;
 409     KeyTable[SDLK_RIGHTBRACKET] = MAC_RIGHTBRACKET_KEY;
 410     KeyTable[SDLK_QUOTE] = MAC_APOSTROPHE_KEY;
 411 }
 412
 413 static inline int clamp_sdl_mouse_button(Uint8 button)
 414 {
 415     if (button == 2)   // right mouse button is button 3 in SDL.
 416         button = 3;
 417     else if (button == 3)
 418         button = 2;
 419
 420     if ((button >= 1) && (button <= 3))
 421         return button - 1;
 422     return -1;
 423 }
 424
 425 static void sdlEventProc(const SDL_Event &e, Game &game)
 426 {
 427     int val;
 428     bool skipkey = false;
 429     SDLMod mod;
 430
 431     switch(e.type)
 432         {
 433         case SDL_MOUSEMOTION:
 434             game.deltah += e.motion.xrel;
 435             game.deltav += e.motion.yrel;
 436             return;
 437
 438                 case SDL_MOUSEBUTTONDOWN:
 439                         {
 440                 val = clamp_sdl_mouse_button(e.button.button);
 441                 if ((val >= 0) && (val <= 2))
 442                 {
 443                     if (val == 0)
 444                                     g_button = true;
 445                                 buttons[val] = true;
 446                 }
 447                         }
 448                         return;
 449
 450                 case SDL_MOUSEBUTTONUP:
 451                         {
 452                 val = clamp_sdl_mouse_button(e.button.button);
 453                 if ((val >= 0) && (val <= 2))
 454                 {
 455                     if (val == 0)
 456                                     g_button = false;
 457                                 buttons[val] = false;
 458                 }
 459                         }
 460             return;
 461
 462         case SDL_KEYDOWN:
 463             if (e.key.keysym.sym == SDLK_g)
 464             {
 465                 if (e.key.keysym.mod & KMOD_CTRL)
 466                 {
 467                     skipkey = true;
 468                     SDL_GrabMode mode = SDL_GRAB_ON;
 469                     if ((SDL_GetVideoSurface()->flags & SDL_FULLSCREEN) == 0)
 470                     {
 471                         mode = SDL_WM_GrabInput(SDL_GRAB_QUERY);
 472                         mode = (mode==SDL_GRAB_ON) ? SDL_GRAB_OFF:SDL_GRAB_ON;
 473                     }
 474                     SDL_WM_GrabInput(mode);
 475                 }
 476             }
 477
 478             else if (e.key.keysym.sym == SDLK_RETURN)
 479             {
 480                 if (e.key.keysym.mod & KMOD_ALT)
 481                 {
 482                     skipkey = true;
 483                     SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
 484                 }
 485             }
 486
 487             if ((!skipkey) && (e.key.keysym.sym < SDLK_LAST))
 488             {
 489                 if (KeyTable[e.key.keysym.sym] != 0xffff)
 490                     SetKey(KeyTable[e.key.keysym.sym]);
 491             }
 492
 493             mod = SDL_GetModState();
 494             if (mod & KMOD_CTRL)
 495                 SetKey(MAC_CONTROL_KEY);
 496             if (mod & KMOD_ALT)
 497                 SetKey(MAC_OPTION_KEY);
 498             if (mod & KMOD_META)
 499                 SetKey(MAC_COMMAND_KEY);
 500             if (mod & KMOD_SHIFT)
 501                 SetKey(MAC_SHIFT_KEY);
 502             if (mod & KMOD_CAPS)
 503                 SetKey(MAC_CAPS_LOCK_KEY);
 504
 505             return;
 506
 507         case SDL_KEYUP:
 508             if (e.key.keysym.sym < SDLK_LAST)
 509             {
 510                 if (KeyTable[e.key.keysym.sym] != 0xffff)
 511                     ClearKey(KeyTable[e.key.keysym.sym]);
 512             }
 513
 514             mod = SDL_GetModState();
 515             if ((mod & KMOD_CTRL) == 0)
 516                 ClearKey(MAC_CONTROL_KEY);
 517             if ((mod & KMOD_ALT) == 0)
 518                 ClearKey(MAC_OPTION_KEY);
 519             if ((mod & KMOD_META) == 0)
 520                 ClearKey(MAC_COMMAND_KEY);
 521             if ((mod & KMOD_SHIFT) == 0)
 522                 ClearKey(MAC_SHIFT_KEY);
 523             if ((mod & KMOD_CAPS) == 0)
 524                 ClearKey(MAC_CAPS_LOCK_KEY);
 525             return;
 526     }
 527 }
 528
 529
 530 // --------------------------------------------------------------------------
 531
 532 static Point gMidPoint;
 533
 534 Boolean SetUp (Game & game)
 535 {
 536         char string[10];
 537
 538         LOGFUNC;
 539
 540         randSeed = UpTime().lo;
 541
 542         osx = 0;
 543         cellophane=0;
 544         texdetail=4;
 545         terraindetail=2;
 546         slomospeed=0.25;
 547         slomofreq=8012;
 548         numplayers=1;
 549
 550         DefaultSettings(game);
 551
 552     if (!SDL_WasInit(SDL_INIT_VIDEO))
 553         if (SDL_Init(SDL_INIT_VIDEO) == -1)
 554         {
 555             fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError());
 556             return false;
 557         }
 558         if(!LoadSettings(game)) {
 559                 fprintf(stderr, "Failed to load config, creating default\n");
 560                 SaveSettings(game);
 561         }
 562         if(kBitsPerPixel!=32&&kBitsPerPixel!=16){
 563                 kBitsPerPixel=16;
 564         }
 565
 566         if (SDL_GL_LoadLibrary(NULL) == -1)
 567         {
 568                 fprintf(stderr, "SDL_GL_LoadLibrary() failed: %s\n", SDL_GetError());
 569                 SDL_Quit();
 570                 return false;
 571         }
 572
 573         SDL_Rect **res = SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_OPENGL);
 574         if ( (res == NULL) || (res == ((SDL_Rect **)-1)) || (res[0] == NULL) || (res[0]->w < 640) || (res[0]->h < 480) )
 575                 res = hardcoded_resolutions;
 576
 577         // reverse list (it was sorted biggest to smallest by SDL)...
 578         int count;
 579         for (count = 0; res[count]; count++)
 580         {
 581                 if ((res[count]->w < 640) || (res[count]->h < 480))
 582                         break;   // sane lower limit.
 583         }
 584
 585         static SDL_Rect *resolutions_block = NULL;
 586         resolutions_block = (SDL_Rect*) realloc(resolutions_block, sizeof (SDL_Rect) * count);
 587         resolutions = (SDL_Rect**) realloc(resolutions, sizeof (SDL_Rect *) * (count + 1));
 588         if ((resolutions_block == NULL) || (resolutions == NULL))
 589         {
 590                 SDL_Quit();
 591                 fprintf(stderr, "Out of memory!\n");
 592                 return false;
 593         }
 594
 595         resolutions[count--] = NULL;
 596         for (int i = 0; count >= 0; i++, count--)
 597         {
 598                 memcpy(&resolutions_block[count], res[i], sizeof (SDL_Rect));
 599                 resolutions[count] = &resolutions_block[count];
 600         }
 601
 602         if (cmdline("showresolutions"))
 603         {
 604                 printf("Resolutions we think are okay:\n");
 605                 for (int i = 0; resolutions[i]; i++)
 606                         printf("  %d x %d\n", (int) resolutions[i]->w, (int) resolutions[i]->h);
 607         }
 608
 609     Uint32 sdlflags = SDL_OPENGL;
 610     if (!cmdline("windowed"))
 611         sdlflags |= SDL_FULLSCREEN;
 612
 613     SDL_WM_SetCaption("Lugaru", "Lugaru");
 614
 615     SDL_ShowCursor(0);
 616
 617     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 618     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
 619
 620     if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 621     {
 622         fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 623         fprintf(stderr, "forcing 640x480...\n");
 624         kContextWidth = 640;
 625         kContextHeight = 480;
 626         if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 627         {
 628             fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 629             fprintf(stderr, "forcing 640x480 windowed mode...\n");
 630             sdlflags &= ~SDL_FULLSCREEN;
 631             if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
 632             {
 633                 fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
 634                 return false;
 635             }
 636         }
 637     }
 638
 639     int dblbuf = 0;
 640     if ((SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &dblbuf) == -1) || (!dblbuf))
 641     {
 642         fprintf(stderr, "Failed to get double buffered GL context!\n");
 643         SDL_Quit();
 644         return false;
 645     }
 646
 647     if (!lookup_all_glsyms())
 648     {
 649         SDL_Quit();
 650         return false;
 651     }
 652
 653     if (!cmdline("nomousegrab"))
 654         SDL_WM_GrabInput(SDL_GRAB_ON);
 655
 656
 657         glClear( GL_COLOR_BUFFER_BIT );
 658         swap_gl_buffers();
 659
 660         // clear all states
 661         glDisable( GL_ALPHA_TEST);
 662         glDisable( GL_BLEND);
 663         glDisable( GL_DEPTH_TEST);
 664         //      glDisable( GL_DITHER);
 665         glDisable( GL_FOG);
 666         glDisable( GL_LIGHTING);
 667         glDisable( GL_LOGIC_OP);
 668         glDisable( GL_TEXTURE_1D);
 669         glDisable( GL_TEXTURE_2D);
 670         glPixelTransferi( GL_MAP_COLOR, GL_FALSE);
 671         glPixelTransferi( GL_RED_SCALE, 1);
 672         glPixelTransferi( GL_RED_BIAS, 0);
 673         glPixelTransferi( GL_GREEN_SCALE, 1);
 674         glPixelTransferi( GL_GREEN_BIAS, 0);
 675         glPixelTransferi( GL_BLUE_SCALE, 1);
 676         glPixelTransferi( GL_BLUE_BIAS, 0);
 677         glPixelTransferi( GL_ALPHA_SCALE, 1);
 678         glPixelTransferi( GL_ALPHA_BIAS, 0);
 679
 680         // set initial rendering states
 681         glShadeModel( GL_SMOOTH);
 682         glClearDepth( 1.0f);
 683         glDepthFunc( GL_LEQUAL);
 684         glDepthMask( GL_TRUE);
 685         //      glDepthRange( FRONT_CLIP, BACK_CLIP);
 686         glEnable( GL_DEPTH_TEST);
 687         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
 688         glCullFace( GL_FRONT);
 689         glEnable( GL_CULL_FACE);
 690         glEnable( GL_LIGHTING);
 691 //      glEnable( GL_LIGHT_MODEL_AMBIENT);
 692         glEnable( GL_DITHER);
 693         glEnable( GL_COLOR_MATERIAL);
 694         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 695         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
 696         glAlphaFunc( GL_GREATER, 0.5f);
 697
 698         GLint width = kContextWidth;
 699         GLint height = kContextHeight;
 700         gMidPoint.h = width / 2;
 701         gMidPoint.v = height / 2;
 702         screenwidth=width;
 703         screenheight=height;
 704
 705         game.newdetail=detail;
 706         game.newscreenwidth=screenwidth;
 707         game.newscreenheight=screenheight;
 708
 709         if ( CanInitStereo(stereomode) ) {
 710                 InitStereo(stereomode);
 711         } else {
 712                 fprintf(stderr, "Failed to initialize stereo, disabling.\n");
 713                 stereomode = stereoNone;
 714         }
 715
 716         game.InitGame();
 717
 718         return true;
 719 }
 720
 721
 722 static void DoMouse(Game & game)
 723 {
 724
 725         if(mainmenu||(abs(game.deltah)<10*realmultiplier*1000&&abs(game.deltav)<10*realmultiplier*1000))
 726         {
 727                 game.deltah *= usermousesensitivity;
 728                 game.deltav *= usermousesensitivity;
 729                 game.mousecoordh += game.deltah;
 730                 game.mousecoordv += game.deltav;
 731         if (game.mousecoordh < 0)
 732             game.mousecoordh = 0;
 733         else if (game.mousecoordh >= kContextWidth)
 734             game.mousecoordh = kContextWidth - 1;
 735         if (game.mousecoordv < 0)
 736             game.mousecoordv = 0;
 737         else if (game.mousecoordv >= kContextHeight)
 738             game.mousecoordv = kContextHeight - 1;
 739         }
 740
 741 }
 742
 743
 744
 745 // --------------------------------------------------------------------------
 746
 747 void DoKey (SInt8 theKey, SInt8 theCode)
 748 {
 749         // do nothing
 750 }
 751
 752 // --------------------------------------------------------------------------
 753
 754
 755
 756 void DoFrameRate (int update)
 757 {
 758         static long frames = 0;
 759
 760         static AbsoluteTime time = {0,0};
 761         static AbsoluteTime frametime = {0,0};
 762         AbsoluteTime currTime = UpTime ();
 763         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, frametime);
 764
 765         if (0 > deltaTime)      // if negative microseconds
 766                 deltaTime /= -1000000.0;
 767         else                            // else milliseconds
 768                 deltaTime /= 1000.0;
 769
 770         multiplier=deltaTime;
 771         if(multiplier<.001) multiplier=.001;
 772         if(multiplier>10) multiplier=10;
 773         if(update) frametime = currTime;        // reset for next time interval
 774
 775         deltaTime = (float) AbsoluteDeltaToDuration (currTime, time);
 776
 777         if (0 > deltaTime)      // if negative microseconds
 778                 deltaTime /= -1000000.0;
 779         else                            // else milliseconds
 780                 deltaTime /= 1000.0;
 781         frames++;
 782         if (0.001 <= deltaTime) // has update interval passed
 783         {
 784                 if(update){
 785                         time = currTime;        // reset for next time interval
 786                         frames = 0;
 787                 }
 788         }
 789 }
 790
 791
 792 void DoUpdate (Game & game)
 793 {
 794         static float sps=200;
 795         static int count;
 796         static float oldmult;
 797
 798         DoFrameRate(1);
 799         if(multiplier>.6)multiplier=.6;
 800
 801         game.fps=1/multiplier;
 802
 803         count = multiplier*sps;
 804         if(count<2)count=2;
 805         //if(count>10)count=10;
 806
 807         realmultiplier=multiplier;
 808         multiplier*=gamespeed;
 809         if(difficulty==1)multiplier*=.9;
 810         if(difficulty==0)multiplier*=.8;
 811
 812         if(game.loading==4)multiplier*=.00001;
 813         //multiplier*.9;
 814         if(slomo&&!mainmenu)multiplier*=slomospeed;
 815         //if(freeze)multiplier*=0.00001;
 816         oldmult=multiplier;
 817         multiplier/=(float)count;
 818
 819         DoMouse(game);
 820
 821         game.TickOnce();
 822
 823         for(int i=0;i<count;i++)
 824         {
 825                 game.Tick();
 826         }
 827         multiplier=oldmult;
 828
 829         game.TickOnceAfter();
 830 /* - Debug code to test how many channels were active on average per frame
 831         static long frames = 0;
 832
 833         static AbsoluteTime start = {0,0};
 834         AbsoluteTime currTime = UpTime ();
 835         static int num_channels = 0;
 836
 837         num_channels += OPENAL_GetChannelsPlaying();
 838         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, start);
 839
 840         if (0 > deltaTime)      // if negative microseconds
 841                 deltaTime /= -1000000.0;
 842         else                            // else milliseconds
 843                 deltaTime /= 1000.0;
 844
 845         ++frames;
 846
 847         if (deltaTime >= 1)
 848         {
 849                 start = currTime;
 850                 float avg_channels = (float)num_channels / (float)frames;
 851
 852                 ofstream opstream("log.txt",ios::app);
 853                 opstream << "Average frame count: ";
 854                 opstream << frames;
 855                 opstream << " frames - ";
 856                 opstream << avg_channels;
 857                 opstream << " per frame.\n";
 858                 opstream.close();
 859
 860                 frames = 0;
 861                 num_channels = 0;
 862         }
 863 */
 864         DrawGL (game);
 865 }
 866
 867 // --------------------------------------------------------------------------
 868
 869
 870 void CleanUp (void)
 871 {
 872         LOGFUNC;
 873
 874 //      game.Dispose();
 875
 876
 877
 878
 879     SDL_Quit();
 880     #define GL_FUNC(ret,fn,params,call,rt) p##fn = NULL;
 881     #include "glstubs.h"
 882     #undef GL_FUNC
 883     // cheat here...static destructors are calling glDeleteTexture() after
 884     //  the context is destroyed and libGL unloaded by SDL_Quit().
 885     pglDeleteTextures = glDeleteTextures_doNothing;
 886
 887 }
 888
 889 // --------------------------------------------------------------------------
 890
 891 static bool IsFocused()
 892 {
 893     return ((SDL_GetAppState() & SDL_APPINPUTFOCUS) != 0);
 894 }
 895
 896
 897 static void launch_web_browser(const char *url)
 898 {
 899 #ifdef WIN32
 900     ShellExecute(NULL, "open", url, NULL, NULL, SW_SHOWNORMAL);
 901
 902 #elif (defined(__APPLE__) && defined(__MACH__))
 903     const char *fmt = "open '%s'";
 904     const size_t len = strlen(fmt) + strlen(url) + 16;
 905     char *buf = new char[len];
 906     snprintf(buf, len, fmt, url);
 907     system(buf);
 908     delete[] buf;
 909
 910 #elif PLATFORM_LINUX
 911     const char *fmt = "PATH=$PATH:. xdg-open '%s'";
 912     const size_t len = strlen(fmt) + strlen(url) + 16;
 913     char *buf = new char[len];
 914     snprintf(buf, len, fmt, url);
 915     system(buf);
 916     delete[] buf;
 917 #endif
 918 }
 919
 920
 921 #ifndef WIN32
 922 // (code lifted from physfs: http://icculus.org/physfs/ ... zlib license.)
 923 static char *findBinaryInPath(const char *bin, char *envr)
 924 {
 925     size_t alloc_size = 0;
 926     char *exe = NULL;
 927     char *start = envr;
 928     char *ptr;
 929
 930     do
 931     {
 932         size_t size;
 933         ptr = strchr(start, ':');  /* find next $PATH separator. */
 934         if (ptr)
 935             *ptr = '\0';
 936
 937         size = strlen(start) + strlen(bin) + 2;
 938         if (size > alloc_size)
 939         {
 940             char *x = (char *) realloc(exe, size);
 941             if (x == NULL)
 942             {
 943                 if (exe != NULL)
 944                     free(exe);
 945                 return(NULL);
 946             } /* if */
 947
 948             alloc_size = size;
 949             exe = x;
 950         } /* if */
 951
 952         /* build full binary path... */
 953         strcpy(exe, start);
 954         if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
 955             strcat(exe, "/");
 956         strcat(exe, bin);
 957
 958         if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
 959         {
 960             strcpy(exe, start);  /* i'm lazy. piss off. */
 961             return(exe);
 962         } /* if */
 963
 964         start = ptr + 1;  /* start points to beginning of next element. */
 965     } while (ptr != NULL);
 966
 967     if (exe != NULL)
 968         free(exe);
 969
 970     return(NULL);  /* doesn't exist in path. */
 971 } /* findBinaryInPath */
 972
 973
 974 char *calcBaseDir(const char *argv0)
 975 {
 976     /* If there isn't a path on argv0, then look through the $PATH for it. */
 977     char *retval;
 978     char *envr;
 979
 980     const char *ptr = strrchr((char *)argv0, '/');
 981     if (strchr(argv0, '/'))
 982     {
 983         retval = strdup(argv0);
 984         if (retval)
 985             *((char *) strrchr(retval, '/')) = '\0';
 986         return(retval);
 987     }
 988
 989     envr = getenv("PATH");
 990     if (!envr) return NULL;
 991     envr = strdup(envr);
 992     if (!envr) return NULL;
 993     retval = findBinaryInPath(argv0, envr);
 994     free(envr);
 995     return(retval);
 996 }
 997
 998 static inline void chdirToAppPath(const char *argv0)
 999 {
1000     char *dir = calcBaseDir(argv0);
1001     if (dir)
1002     {
1003         #if (defined(__APPLE__) && defined(__MACH__))
1004         // Chop off /Contents/MacOS if it's at the end of the string, so we
1005         //  land in the base of the app bundle.
1006         const size_t len = strlen(dir);
1007         const char *bundledirs = "/Contents/MacOS";
1008         const size_t bundledirslen = strlen(bundledirs);
1009         if (len > bundledirslen)
1010         {
1011             char *ptr = (dir + len) - bundledirslen;
1012             if (strcasecmp(ptr, bundledirs) == 0)
1013                 *ptr = '\0';
1014         }
1015         #endif
1016         chdir(dir);
1017         free(dir);
1018     }
1019 }
1020 #endif
1021
1022
1023 int main(int argc, char **argv)
1024 {
1025 #ifndef __MINGW32__
1026     _argc = argc;
1027     _argv = argv;
1028 #endif
1029
1030     // !!! FIXME: we could use a Win32 API for this.  --ryan.
1031 #ifndef WIN32
1032     chdirToAppPath(argv[0]);
1033 #endif
1034
1035         LOGFUNC;
1036
1037         memset( &g_theKeys, 0, sizeof( KeyMap));
1038
1039     initSDLKeyTable();
1040
1041         try
1042         {
1043                 bool regnow = false;
1044                 {
1045                         Game game;
1046                         pgame = &game;
1047
1048                         //ofstream os("error.txt");
1049                         //os.close();
1050                         //ofstream os("log.txt");
1051                         //os.close();
1052
1053                         if (!SetUp (game))
1054                 return 42;
1055
1056                         while (!gDone&&!game.quit&&(!game.tryquit))
1057                         {
1058                                 if (IsFocused())
1059                                 {
1060                                         gameFocused = true;
1061
1062                                         // check windows messages
1063
1064                                         game.deltah = 0;
1065                                         game.deltav = 0;
1066                                         SDL_Event e;
1067                                         // message pump
1068                                         while( SDL_PollEvent( &e ) )
1069                                         {
1070                                                 if( e.type == SDL_QUIT )
1071                                                 {
1072                                                         gDone=true;
1073                                                         break;
1074                                                 }
1075                                                 sdlEventProc(e, game);
1076                                         }
1077
1078
1079                                         // game
1080                                         DoUpdate(game);
1081                                 }
1082                                 else
1083                                 {
1084                                         if (gameFocused)
1085                                         {
1086                                                 // allow game chance to pause
1087                                                 gameFocused = false;
1088                                                 DoUpdate(game);
1089                                         }
1090
1091                                         // game is not in focus, give CPU time to other apps by waiting for messages instead of 'peeking'
1092                                         SDL_ActiveEvent evt;
1093                                         SDL_WaitEvent((SDL_Event*)&evt);
1094                                         if (evt.type == SDL_ACTIVEEVENT && evt.gain == 1)
1095                                                 gameFocused = true;
1096                                         else if (evt.type == SDL_QUIT)
1097                                                 gDone = true;
1098                                 }
1099                         }
1100
1101                         regnow = game.registernow;
1102                 }
1103                 pgame = 0;
1104
1105                 CleanUp ();
1106
1107                 return 0;
1108         }
1109         catch (const std::exception& error)
1110         {
1111                 CleanUp();
1112
1113                 std::string e = "Caught exception: ";
1114                 e += error.what();
1115
1116                 LOG(e);
1117
1118                 MessageBox(g_windowHandle, error.what(), "ERROR", MB_OK | MB_ICONEXCLAMATION);
1119         }
1120
1121         CleanUp();
1122
1123         return -1;
1124 }
1125
1126
1127
1128         // --------------------------------------------------------------------------
1129
1130         extern int channels[100];
1131         extern OPENAL_SAMPLE * samp[100];
1132         extern OPENAL_STREAM * strm[20];
1133
1134         extern "C" void PlaySoundEx(int chan, OPENAL_SAMPLE *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
1135         {
1136                 const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
1137                 if (currSample && currSample == samp[chan])
1138                 {
1139                         if (OPENAL_GetPaused(channels[chan]))
1140                         {
1141                                 OPENAL_StopSound(channels[chan]);
1142                                 channels[chan] = OPENAL_FREE;
1143                         }
1144                         else if (OPENAL_IsPlaying(channels[chan]))
1145                         {
1146                                 int loop_mode = OPENAL_GetLoopMode(channels[chan]);
1147                                 if (loop_mode & OPENAL_LOOP_OFF)
1148                                 {
1149                                         channels[chan] = OPENAL_FREE;
1150                                 }
1151                         }
1152                 }
1153                 else
1154                 {
1155                         channels[chan] = OPENAL_FREE;
1156                 }
1157
1158                 channels[chan] = OPENAL_PlaySoundEx(channels[chan], sptr, dsp, startpaused);
1159                 if (channels[chan] < 0)
1160                 {
1161                         channels[chan] = OPENAL_PlaySoundEx(OPENAL_FREE, sptr, dsp, startpaused);
1162                 }
1163         }
1164
1165         extern "C" void PlayStreamEx(int chan, OPENAL_STREAM *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
1166         {
1167                 const OPENAL_SAMPLE * currSample = OPENAL_GetCurrentSample(channels[chan]);
1168                 if (currSample && currSample == OPENAL_Stream_GetSample(sptr))
1169                 {
1170                                 OPENAL_StopSound(channels[chan]);
1171                                 OPENAL_Stream_Stop(sptr);
1172                 }
1173                 else
1174                 {
1175                         OPENAL_Stream_Stop(sptr);
1176                         channels[chan] = OPENAL_FREE;
1177                 }
1178
1179                 channels[chan] = OPENAL_Stream_PlayEx(channels[chan], sptr, dsp, startpaused);
1180                 if (channels[chan] < 0)
1181                 {
1182                         channels[chan] = OPENAL_Stream_PlayEx(OPENAL_FREE, sptr, dsp, startpaused);
1183                 }
1184         }
1185
1186
1187         bool LoadImage(const char * fname, TGAImageRec & tex)
1188         {
1189                 if ( tex.data == NULL )
1190                         return false;
1191                 else
1192                         return load_image(fname, tex);
1193         }
1194
1195         void ScreenShot(const char * fname)
1196         {
1197         save_image(fname);
1198         }
1199
1200
1201
1202 static bool load_image(const char *file_name, TGAImageRec &tex)
1203 {
1204     const char *ptr = strrchr((char *)file_name, '.');
1205     if (ptr)
1206     {
1207         if (strcasecmp(ptr+1, "png") == 0)
1208             return load_png(file_name, tex);
1209         else if (strcasecmp(ptr+1, "jpg") == 0)
1210             return load_jpg(file_name, tex);
1211     }
1212
1213     STUBBED("Unsupported image type");
1214     return false;
1215 }
1216
1217
1218 struct my_error_mgr {
1219   struct jpeg_error_mgr pub;    /* "public" fields */
1220   jmp_buf setjmp_buffer;        /* for return to caller */
1221 };
1222 typedef struct my_error_mgr * my_error_ptr;
1223
1224
1225 static void my_error_exit(j_common_ptr cinfo)
1226 {
1227         struct my_error_mgr *err = (struct my_error_mgr *)cinfo->err;
1228         longjmp(err->setjmp_buffer, 1);
1229 }
1230
1231 /* stolen from public domain example.c code in libjpg distribution. */
1232 static bool load_jpg(const char *file_name, TGAImageRec &tex)
1233 {
1234     struct jpeg_decompress_struct cinfo;
1235     struct my_error_mgr jerr;
1236     JSAMPROW buffer[1];         /* Output row buffer */
1237     int row_stride;             /* physical row width in output buffer */
1238     FILE *infile = fopen(file_name, "rb");
1239
1240     if (infile == NULL)
1241         return false;
1242
1243     cinfo.err = jpeg_std_error(&jerr.pub);
1244     jerr.pub.error_exit = my_error_exit;
1245     if (setjmp(jerr.setjmp_buffer)) {
1246         jpeg_destroy_decompress(&cinfo);
1247         fclose(infile);
1248         return false;
1249     }
1250
1251     jpeg_create_decompress(&cinfo);
1252     jpeg_stdio_src(&cinfo, infile);
1253     (void) jpeg_read_header(&cinfo, TRUE);
1254
1255     cinfo.out_color_space = JCS_RGB;
1256     cinfo.quantize_colors = 0;
1257     (void) jpeg_calc_output_dimensions(&cinfo);
1258     (void) jpeg_start_decompress(&cinfo);
1259
1260     row_stride = cinfo.output_width * cinfo.output_components;
1261     tex.sizeX = cinfo.output_width;
1262     tex.sizeY = cinfo.output_height;
1263     tex.bpp = 24;
1264
1265     while (cinfo.output_scanline < cinfo.output_height) {
1266         buffer[0] = (JSAMPROW)(char *)tex.data +
1267                         ((cinfo.output_height-1) - cinfo.output_scanline) * row_stride;
1268         (void) jpeg_read_scanlines(&cinfo, buffer, 1);
1269     }
1270
1271     (void) jpeg_finish_decompress(&cinfo);
1272     jpeg_destroy_decompress(&cinfo);
1273     fclose(infile);
1274
1275     return true;
1276 }
1277
1278
1279 /* stolen from public domain example.c code in libpng distribution. */
1280 static bool load_png(const char *file_name, TGAImageRec &tex)
1281 {
1282     bool hasalpha = false;
1283     png_structp png_ptr = NULL;
1284     png_infop info_ptr = NULL;
1285     png_uint_32 width, height;
1286     int bit_depth, color_type, interlace_type;
1287     png_byte **rows = NULL;
1288     bool retval = false;
1289     png_byte **row_pointers = NULL;
1290     FILE *fp = fopen(file_name, "rb");
1291
1292     if (fp == NULL)
1293         return(NULL);
1294
1295     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1296     if (png_ptr == NULL)
1297         goto png_done;
1298
1299     info_ptr = png_create_info_struct(png_ptr);
1300     if (info_ptr == NULL)
1301         goto png_done;
1302
1303     if (setjmp(png_jmpbuf(png_ptr)))
1304         goto png_done;
1305
1306     png_init_io(png_ptr, fp);
1307     png_read_png(png_ptr, info_ptr,
1308                  PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING,
1309                  NULL);
1310     png_get_IHDR(png_ptr, info_ptr, &width, &height,
1311                  &bit_depth, &color_type, &interlace_type, NULL, NULL);
1312
1313     if (bit_depth != 8)  // transform SHOULD handle this...
1314         goto png_done;
1315
1316     if (color_type & PNG_COLOR_MASK_PALETTE)  // !!! FIXME?
1317         goto png_done;
1318
1319     if ((color_type & PNG_COLOR_MASK_COLOR) == 0)  // !!! FIXME?
1320         goto png_done;
1321
1322     hasalpha = ((color_type & PNG_COLOR_MASK_ALPHA) != 0);
1323     row_pointers = png_get_rows(png_ptr, info_ptr);
1324     if (!row_pointers)
1325         goto png_done;
1326
1327     if (!hasalpha)
1328     {
1329         png_byte *dst = tex.data;
1330         for (int i = height-1; i >= 0; i--)
1331         {
1332             png_byte *src = row_pointers[i];
1333             for (int j = 0; j < width; j++)
1334             {
1335                 dst[0] = src[0];
1336                 dst[1] = src[1];
1337                 dst[2] = src[2];
1338                 dst[3] = 0xFF;
1339                 src += 3;
1340                 dst += 4;
1341             }
1342         }
1343     }
1344
1345     else
1346     {
1347         png_byte *dst = tex.data;
1348         int pitch = width * 4;
1349         for (int i = height-1; i >= 0; i--, dst += pitch)
1350             memcpy(dst, row_pointers[i], pitch);
1351     }
1352
1353     tex.sizeX = width;
1354     tex.sizeY = height;
1355     tex.bpp = 32;
1356     retval = true;
1357
1358 png_done:
1359     png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
1360     if (fp)
1361         fclose(fp);
1362     return (retval);
1363 }
1364
1365
1366 static bool save_image(const char *file_name)
1367 {
1368     const char *ptr = strrchr((char *)file_name, '.');
1369     if (ptr)
1370     {
1371         if (strcasecmp(ptr+1, "png") == 0)
1372             return save_png(file_name);
1373     }
1374
1375     STUBBED("Unsupported image type");
1376     return false;
1377 }
1378
1379
1380 static bool save_png(const char *file_name)
1381 {
1382     FILE *fp = NULL;
1383     png_structp png_ptr = NULL;
1384     png_infop info_ptr = NULL;
1385     bool retval = false;
1386
1387     fp = fopen(file_name, "wb");
1388     if (fp == NULL)
1389         return false;
1390
1391     png_bytep *row_pointers = new png_bytep[kContextHeight];
1392     png_bytep screenshot = new png_byte[kContextWidth * kContextHeight * 3];
1393     if ((!screenshot) || (!row_pointers))
1394         goto save_png_done;
1395
1396     glGetError();
1397     glReadPixels(0, 0, kContextWidth, kContextHeight,
1398                  GL_RGB, GL_UNSIGNED_BYTE, screenshot);
1399     if (glGetError() != GL_NO_ERROR)
1400         goto save_png_done;
1401
1402     for (int i = 0; i < kContextHeight; i++)
1403         row_pointers[i] = screenshot + ((kContextWidth * ((kContextHeight-1) - i)) * 3);
1404
1405     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1406     if (png_ptr == NULL)
1407         goto save_png_done;
1408
1409     info_ptr = png_create_info_struct(png_ptr);
1410     if (info_ptr == NULL)
1411         goto save_png_done;
1412
1413     if (setjmp(png_jmpbuf(png_ptr)))
1414         goto save_png_done;
1415
1416     png_init_io(png_ptr, fp);
1417
1418     if (setjmp(png_jmpbuf(png_ptr)))
1419         goto save_png_done;
1420
1421     png_set_IHDR(png_ptr, info_ptr, kContextWidth, kContextHeight,
1422                  8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
1423                  PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
1424
1425     png_write_info(png_ptr, info_ptr);
1426
1427     if (setjmp(png_jmpbuf(png_ptr)))
1428         goto save_png_done;
1429
1430         png_write_image(png_ptr, row_pointers);
1431
1432         if (setjmp(png_jmpbuf(png_ptr)))
1433         goto save_png_done;
1434
1435     png_write_end(png_ptr, NULL);
1436     retval = true;
1437
1438 save_png_done:
1439     png_destroy_write_struct(&png_ptr, &info_ptr);
1440     delete[] screenshot;
1441     delete[] row_pointers;
1442     if (fp)
1443         fclose(fp);
1444     if (!retval)
1445         unlink(ConvertFileName(file_name));
1446     return retval;
1447 }
1448
1449
1450