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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 using namespace Game;
49
50 static bool load_image(const char * fname, TGAImageRec & tex);
51 static bool load_png(const char * fname, TGAImageRec & tex);
52 static bool load_jpg(const char * fname, TGAImageRec & tex);
53 bool save_image(const char * fname);
54 static bool save_png(const char * fname);
55
56
57 #include "openal_wrapper.h"
58
59 extern float multiplier;
60 extern float sps;
61 extern float realmultiplier;
62 extern int slomo;
63 extern bool cellophane;
64 extern float texdetail;
65
66 extern bool osx;
67 extern bool freeze;
68 extern bool stillloading;
69 extern int mainmenu;
70 /*extern*/ bool gameFocused;
71
72 extern float slomospeed;
73 extern float slomofreq;
74
75
76
77 #include <math.h>
78 #include <stdio.h>
79 #include <string.h>
80 #include <fstream>
81 #include <iostream>
82 #include "gamegl.h"
83 #include "MacCompatibility.h"
84 #include "Settings.h"
85
86 #ifdef WIN32
87 #include <shellapi.h>
88 #include "win-res/resource.h"
89 #endif
90
91 using namespace std;
92
93 SDL_Rect **resolutions = NULL;
94 static SDL_Rect rect_1024_768 = { 0, 0, 1024, 768 };
95 static SDL_Rect rect_800_600  = { 0, 0, 800,  600 };
96 static SDL_Rect rect_640_480  = { 0, 0, 640,  480 };
97 static SDL_Rect *hardcoded_resolutions[] = {
98     &rect_1024_768,
99     &rect_800_600,
100     &rect_640_480,
101     NULL
102 };
103
104 Boolean SetUp ();
105 void DoUpdate ();
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 #ifndef __MINGW32__
167 static int _argc = 0;
168 static char **_argv = NULL;
169 #endif
170
171 bool cmdline(const char *cmd)
172 {
173     for (int i = 1; i < _argc; i++)
174     {
175         char *arg = _argv[i];
176         while (*arg == '-')
177             arg++;
178         if (strcasecmp(arg, cmd) == 0)
179             return true;
180     }
181
182     return false;
183 }
184
185 //-----------------------------------------------------------------------------------------------------------------------
186
187 // OpenGL Drawing
188
189 void initGL(){
190         glClear( GL_COLOR_BUFFER_BIT );
191         swap_gl_buffers();
192
193         // clear all states
194         glDisable( GL_ALPHA_TEST);
195         glDisable( GL_BLEND);
196         glDisable( GL_DEPTH_TEST);
197         //      glDisable( GL_DITHER);
198         glDisable( GL_FOG);
199         glDisable( GL_LIGHTING);
200         glDisable( GL_LOGIC_OP);
201         glDisable( GL_TEXTURE_1D);
202         glDisable( GL_TEXTURE_2D);
203         glPixelTransferi( GL_MAP_COLOR, GL_FALSE);
204         glPixelTransferi( GL_RED_SCALE, 1);
205         glPixelTransferi( GL_RED_BIAS, 0);
206         glPixelTransferi( GL_GREEN_SCALE, 1);
207         glPixelTransferi( GL_GREEN_BIAS, 0);
208         glPixelTransferi( GL_BLUE_SCALE, 1);
209         glPixelTransferi( GL_BLUE_BIAS, 0);
210         glPixelTransferi( GL_ALPHA_SCALE, 1);
211         glPixelTransferi( GL_ALPHA_BIAS, 0);
212
213         // set initial rendering states
214         glShadeModel( GL_SMOOTH);
215         glClearDepth( 1.0f);
216         glDepthFunc( GL_LEQUAL);
217         glDepthMask( GL_TRUE);
218         //      glDepthRange( FRONT_CLIP, BACK_CLIP);
219         glEnable( GL_DEPTH_TEST);
220         glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
221         glCullFace( GL_FRONT);
222         glEnable( GL_CULL_FACE);
223         glEnable( GL_LIGHTING);
224 //      glEnable( GL_LIGHT_MODEL_AMBIENT);
225         glEnable( GL_DITHER);
226         glEnable( GL_COLOR_MATERIAL);
227         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
228         glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
229         glAlphaFunc( GL_GREATER, 0.5f);
230
231         if ( CanInitStereo(stereomode) ) {
232                 InitStereo(stereomode);
233         } else {
234                 fprintf(stderr, "Failed to initialize stereo, disabling.\n");
235                 stereomode = stereoNone;
236         }
237 }
238
239 static void toggleFullscreen(){
240         SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
241     //~ SDL_Surface* screen=SDL_GetVideoSurface();
242     //~ Uint32 flags=screen->flags;
243     //~ screen=SDL_SetVideoMode(0,0,0,flags^SDL_FULLSCREEN);
244     //~ if(!screen)
245         //~ screen=SDL_SetVideoMode(0,0,0,flags);
246     //~ if(!screen)
247         //~ exit(1);
248     //~ //reload opengl state
249     //~ initGL();
250     //~ for(std::vector<TextureInfo>::iterator it=Game::textures.begin(); it!=Game::textures.end(); it++) {
251         //~ it->load();
252     //~ }
253     //~ pgame->text.BuildFont();
254     //~ pgame->LoadScreenTexture();
255 }
256
257 static void sdlEventProc(const SDL_Event &e)
258 {
259     switch(e.type) {
260         case SDL_MOUSEMOTION:
261             deltah += e.motion.xrel;
262             deltav += e.motion.yrel;
263             break;
264
265         case SDL_KEYDOWN:
266             if ((e.key.keysym.sym == SDLK_g) &&
267                                 (e.key.keysym.mod & KMOD_CTRL) &&
268                                 !(SDL_GetVideoSurface()->flags & SDL_FULLSCREEN) ) {
269                                 SDL_WM_GrabInput( ((SDL_WM_GrabInput(SDL_GRAB_QUERY)==SDL_GRAB_ON) ? SDL_GRAB_OFF:SDL_GRAB_ON) );
270             } else if ( (e.key.keysym.sym == SDLK_RETURN) && (e.key.keysym.mod & KMOD_ALT) ) {
271                                 toggleFullscreen();
272             }
273             break;
274     }
275 }
276
277
278
279 // --------------------------------------------------------------------------
280
281 static Point gMidPoint;
282
283 Boolean SetUp ()
284 {
285         char string[10];
286
287         LOGFUNC;
288
289         osx = 0;
290         cellophane=0;
291         texdetail=4;
292         slomospeed=0.25;
293         slomofreq=8012;
294         numplayers=1;
295         
296         DefaultSettings();
297
298     if (!SDL_WasInit(SDL_INIT_VIDEO))
299         if (SDL_Init(SDL_INIT_VIDEO) == -1)
300         {
301             fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError());
302             return false;
303         }
304         if(!LoadSettings()) {
305                 fprintf(stderr, "Failed to load config, creating default\n");
306                 SaveSettings();
307         }
308         if(kBitsPerPixel!=32&&kBitsPerPixel!=16){
309                 kBitsPerPixel=16;
310         }
311
312         if (SDL_GL_LoadLibrary(NULL) == -1)
313         {
314                 fprintf(stderr, "SDL_GL_LoadLibrary() failed: %s\n", SDL_GetError());
315                 SDL_Quit();
316                 return false;
317         }
318
319         SDL_Rect **res = SDL_ListModes(NULL, SDL_FULLSCREEN|SDL_OPENGL);
320         if ( (res == NULL) || (res == ((SDL_Rect **)-1)) || (res[0] == NULL) || (res[0]->w < 640) || (res[0]->h < 480) )
321                 res = hardcoded_resolutions;
322
323         // reverse list (it was sorted biggest to smallest by SDL)...
324         int count;
325         for (count = 0; res[count]; count++)
326         {
327                 if ((res[count]->w < 640) || (res[count]->h < 480))
328                         break;   // sane lower limit.
329         }
330
331         static SDL_Rect *resolutions_block = NULL;
332         resolutions_block = (SDL_Rect*) realloc(resolutions_block, sizeof (SDL_Rect) * count);
333         resolutions = (SDL_Rect**) realloc(resolutions, sizeof (SDL_Rect *) * (count + 1));
334         if ((resolutions_block == NULL) || (resolutions == NULL))
335         {
336                 SDL_Quit();
337                 fprintf(stderr, "Out of memory!\n");
338                 return false;
339         }
340
341         resolutions[count--] = NULL;
342         for (int i = 0; count >= 0; i++, count--)
343         {
344                 memcpy(&resolutions_block[count], res[i], sizeof (SDL_Rect));
345                 resolutions[count] = &resolutions_block[count];
346         }
347
348         if (cmdline("showresolutions"))
349         {
350                 printf("Resolutions we think are okay:\n");
351                 for (int i = 0; resolutions[i]; i++)
352                         printf("  %d x %d\n", (int) resolutions[i]->w, (int) resolutions[i]->h);
353         }
354
355     Uint32 sdlflags = SDL_OPENGL;
356     
357     if (!cmdline("windowed"))
358         sdlflags |= SDL_FULLSCREEN;
359
360     SDL_WM_SetCaption("Lugaru", "Lugaru");
361
362     SDL_ShowCursor(0);
363
364     SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
365     SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 1);
366 #if SDL_VERSION_ATLEAST(1, 2, 10)
367     SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, vblsync);
368 #endif
369     
370     if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
371     {
372         fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
373         fprintf(stderr, "forcing 640x480...\n");
374         kContextWidth = 640;
375         kContextHeight = 480;
376         if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
377         {
378             fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
379             fprintf(stderr, "forcing 640x480 windowed mode...\n");
380             sdlflags &= ~SDL_FULLSCREEN;
381             if (SDL_SetVideoMode(kContextWidth, kContextHeight, 0, sdlflags) == NULL)
382             {
383                 fprintf(stderr, "SDL_SetVideoMode() failed: %s\n", SDL_GetError());
384                 return false;
385             }
386         }
387     }
388
389     int dblbuf = 0;
390     if ((SDL_GL_GetAttribute(SDL_GL_DOUBLEBUFFER, &dblbuf) == -1) || (!dblbuf))
391     {
392         fprintf(stderr, "Failed to get double buffered GL context!\n");
393         SDL_Quit();
394         return false;
395     }
396
397     if (!lookup_all_glsyms())
398     {
399         SDL_Quit();
400         return false;
401     }
402
403     if (!cmdline("nomousegrab"))
404         SDL_WM_GrabInput(SDL_GRAB_ON);
405
406
407     initGL();
408
409         GLint width = kContextWidth;
410         GLint height = kContextHeight;
411         gMidPoint.h = width / 2;
412         gMidPoint.v = height / 2;
413         screenwidth=width;
414         screenheight=height;
415
416         newdetail=detail;
417         newscreenwidth=screenwidth;
418         newscreenheight=screenheight;
419
420         InitGame();
421
422         return true;
423 }
424
425
426 static void DoMouse()
427 {
428
429         if(mainmenu|| ( (abs(deltah)<10*realmultiplier*1000) && (abs(deltav)<10*realmultiplier*1000) ))
430         {
431                 deltah *= usermousesensitivity;
432                 deltav *= usermousesensitivity;
433                 mousecoordh += deltah;
434                 mousecoordv += deltav;
435         if (mousecoordh < 0)
436             mousecoordh = 0;
437         else if (mousecoordh >= kContextWidth)
438             mousecoordh = kContextWidth - 1;
439         if (mousecoordv < 0)
440             mousecoordv = 0;
441         else if (mousecoordv >= kContextHeight)
442             mousecoordv = kContextHeight - 1;
443         }
444
445 }
446
447 void DoFrameRate (int update)
448 {       
449         static long frames = 0;
450
451         static AbsoluteTime time = {0,0};
452         static AbsoluteTime frametime = {0,0};
453         AbsoluteTime currTime = UpTime ();
454         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, frametime);
455
456         if (0 > deltaTime)      // if negative microseconds
457                 deltaTime /= -1000000.0;
458         else                            // else milliseconds
459                 deltaTime /= 1000.0;
460
461         multiplier=deltaTime;
462         if(multiplier<.001) multiplier=.001;
463         if(multiplier>10) multiplier=10;
464         if(update) frametime = currTime;        // reset for next time interval
465
466         deltaTime = (float) AbsoluteDeltaToDuration (currTime, time);
467
468         if (0 > deltaTime)      // if negative microseconds
469                 deltaTime /= -1000000.0;
470         else                            // else milliseconds
471                 deltaTime /= 1000.0;
472         frames++;
473         if (0.001 <= deltaTime) // has update interval passed
474         {
475                 if(update){
476                         time = currTime;        // reset for next time interval
477                         frames = 0;
478                 }
479         }
480 }
481
482
483 void DoUpdate ()
484 {
485         static float sps=200;
486         static int count;
487         static float oldmult;
488
489         DoFrameRate(1);
490         if(multiplier>.6)multiplier=.6;
491
492         fps=1/multiplier;
493
494         count = multiplier*sps;
495         if(count<2)count=2;
496
497         realmultiplier=multiplier;
498         multiplier*=gamespeed;
499         if(difficulty==1)multiplier*=.9;
500         if(difficulty==0)multiplier*=.8;
501
502         if(loading==4)multiplier*=.00001;
503         if(slomo&&!mainmenu)multiplier*=slomospeed;
504         oldmult=multiplier;
505         multiplier/=(float)count;
506
507         DoMouse();
508
509         TickOnce();
510
511         for(int i=0;i<count;i++)
512         {
513                 Tick();
514         }
515         multiplier=oldmult;
516
517         TickOnceAfter();
518 /* - Debug code to test how many channels were active on average per frame
519         static long frames = 0;
520
521         static AbsoluteTime start = {0,0};
522         AbsoluteTime currTime = UpTime ();
523         static int num_channels = 0;
524         
525         num_channels += OPENAL_GetChannelsPlaying();
526         double deltaTime = (float) AbsoluteDeltaToDuration (currTime, start);
527
528         if (0 > deltaTime)      // if negative microseconds
529                 deltaTime /= -1000000.0;
530         else                            // else milliseconds
531                 deltaTime /= 1000.0;
532
533         ++frames;
534
535         if (deltaTime >= 1)
536         {
537                 start = currTime;
538                 float avg_channels = (float)num_channels / (float)frames;
539
540                 ofstream opstream("log.txt",ios::app); 
541                 opstream << "Average frame count: ";
542                 opstream << frames;
543                 opstream << " frames - ";
544                 opstream << avg_channels;
545                 opstream << " per frame.\n";
546                 opstream.close();
547
548                 frames = 0;
549                 num_channels = 0;
550         }
551 */
552         if ( stereomode == stereoNone ) {
553                 DrawGLScene(stereoCenter);
554         } else {
555                 DrawGLScene(stereoLeft);
556                 DrawGLScene(stereoRight);
557         }
558 }
559
560 // --------------------------------------------------------------------------
561
562
563 void CleanUp (void)
564 {
565         LOGFUNC;
566
567     SDL_Quit();
568     #define GL_FUNC(ret,fn,params,call,rt) p##fn = NULL;
569     #include "glstubs.h"
570     #undef GL_FUNC
571     // cheat here...static destructors are calling glDeleteTexture() after
572     //  the context is destroyed and libGL unloaded by SDL_Quit().
573     pglDeleteTextures = glDeleteTextures_doNothing;
574
575 }
576
577 // --------------------------------------------------------------------------
578
579 static bool IsFocused()
580 {
581     return ((SDL_GetAppState() & SDL_APPINPUTFOCUS) != 0);
582 }
583
584
585
586 #ifndef WIN32
587 // (code lifted from physfs: http://icculus.org/physfs/ ... zlib license.)
588 static char *findBinaryInPath(const char *bin, char *envr)
589 {
590     size_t alloc_size = 0;
591     char *exe = NULL;
592     char *start = envr;
593     char *ptr;
594
595     do
596     {
597         size_t size;
598         ptr = strchr(start, ':');  /* find next $PATH separator. */
599         if (ptr)
600             *ptr = '\0';
601
602         size = strlen(start) + strlen(bin) + 2;
603         if (size > alloc_size)
604         {
605             char *x = (char *) realloc(exe, size);
606             if (x == NULL)
607             {
608                 if (exe != NULL)
609                     free(exe);
610                 return(NULL);
611             } /* if */
612
613             alloc_size = size;
614             exe = x;
615         } /* if */
616
617         /* build full binary path... */
618         strcpy(exe, start);
619         if ((exe[0] == '\0') || (exe[strlen(exe) - 1] != '/'))
620             strcat(exe, "/");
621         strcat(exe, bin);
622
623         if (access(exe, X_OK) == 0)  /* Exists as executable? We're done. */
624         {
625             strcpy(exe, start);  /* i'm lazy. piss off. */
626             return(exe);
627         } /* if */
628
629         start = ptr + 1;  /* start points to beginning of next element. */
630     } while (ptr != NULL);
631
632     if (exe != NULL)
633         free(exe);
634
635     return(NULL);  /* doesn't exist in path. */
636 } /* findBinaryInPath */
637
638
639 char *calcBaseDir(const char *argv0)
640 {
641     /* If there isn't a path on argv0, then look through the $PATH for it. */
642     char *retval;
643     char *envr;
644
645     const char *ptr = strrchr((char *)argv0, '/');
646     if (strchr(argv0, '/'))
647     {
648         retval = strdup(argv0);
649         if (retval)
650             *((char *) strrchr(retval, '/')) = '\0';
651         return(retval);
652     }
653
654     envr = getenv("PATH");
655     if (!envr) return NULL;
656     envr = strdup(envr);
657     if (!envr) return NULL;
658     retval = findBinaryInPath(argv0, envr);
659     free(envr);
660     return(retval);
661 }
662
663 static inline void chdirToAppPath(const char *argv0)
664 {
665     char *dir = calcBaseDir(argv0);
666     if (dir)
667     {
668         #if (defined(__APPLE__) && defined(__MACH__))
669         // Chop off /Contents/MacOS if it's at the end of the string, so we
670         //  land in the base of the app bundle.
671         const size_t len = strlen(dir);
672         const char *bundledirs = "/Contents/MacOS";
673         const size_t bundledirslen = strlen(bundledirs);
674         if (len > bundledirslen)
675         {
676             char *ptr = (dir + len) - bundledirslen;
677             if (strcasecmp(ptr, bundledirs) == 0)
678                 *ptr = '\0';
679         }
680         #endif
681         chdir(dir);
682         free(dir);
683     }
684 }
685 #endif
686
687
688 int main(int argc, char **argv)
689 {
690 #ifndef __MINGW32__
691     _argc = argc;
692     _argv = argv;
693 #endif
694
695     // !!! FIXME: we could use a Win32 API for this.  --ryan.
696 #ifndef WIN32
697     chdirToAppPath(argv[0]);
698 #endif
699
700         LOGFUNC;
701
702         try
703         {
704                 {
705                         newGame();
706
707                         //ofstream os("error.txt");
708                         //os.close();
709                         //ofstream os("log.txt");
710                         //os.close();
711
712                         if (!SetUp ())
713                 return 42;
714
715                         while (!gDone&&!tryquit)
716                         {
717                                         if (IsFocused())
718                                         {
719                                                         gameFocused = true;
720
721                                                         // check windows messages
722                         
723                                                         deltah = 0;
724                                                         deltav = 0;
725                                                         SDL_Event e;
726                                                         if(!waiting) {
727                                                                         // message pump
728                                                                         while( SDL_PollEvent( &e ) )
729                                                                         {
730                                                                                         if( e.type == SDL_QUIT )
731                                                                                         {
732                                                                                                         gDone=true;
733                                                                                                         break;
734                                                                                         }
735                                                                                         sdlEventProc(e);
736                                                                         }
737                                                         }
738
739                                                         // game
740                                                         DoUpdate();
741                                         }
742                                         else
743                                         {
744                                                         if (gameFocused)
745                                                         {
746                                                                         // allow game chance to pause
747                                                                         gameFocused = false;
748                                                                         DoUpdate();
749                                                         }
750
751                                                         // game is not in focus, give CPU time to other apps by waiting for messages instead of 'peeking'
752                                                         SDL_ActiveEvent evt;
753                                                         SDL_WaitEvent((SDL_Event*)&evt);
754                                                         if (evt.type == SDL_ACTIVEEVENT && evt.gain == 1)
755                                                                         gameFocused = true;
756                                                         else if (evt.type == SDL_QUIT)
757                                                                         gDone = true;
758                                         }
759                         }
760
761             deleteGame();
762                 }
763
764                 CleanUp ();
765
766                 return 0;
767         }
768         catch (const std::exception& error)
769         {
770                 CleanUp();
771
772                 std::string e = "Caught exception: ";
773                 e += error.what();
774
775                 LOG(e);
776
777                 MessageBox(g_windowHandle, error.what(), "ERROR", MB_OK | MB_ICONEXCLAMATION);
778         }
779
780         CleanUp();
781
782         return -1;
783 }
784
785
786
787 // --------------------------------------------------------------------------
788
789
790 bool LoadImage(const char * fname, TGAImageRec & tex)
791 {
792         if ( tex.data == NULL )
793                 return false;
794         else
795                 return load_image(fname, tex);
796 }
797
798 void ScreenShot(const char * fname)
799 {
800         
801 }
802
803
804
805 static bool load_image(const char *file_name, TGAImageRec &tex)
806 {
807     const char *ptr = strrchr((char *)file_name, '.');
808     if (ptr)
809     {
810         if (strcasecmp(ptr+1, "png") == 0)
811             return load_png(file_name, tex);
812         else if (strcasecmp(ptr+1, "jpg") == 0)
813             return load_jpg(file_name, tex);
814     }
815
816     STUBBED("Unsupported image type");
817     return false;
818 }
819
820
821 struct my_error_mgr {
822   struct jpeg_error_mgr pub;    /* "public" fields */
823   jmp_buf setjmp_buffer;        /* for return to caller */
824 };
825 typedef struct my_error_mgr * my_error_ptr;
826
827
828 static void my_error_exit(j_common_ptr cinfo)
829 {
830         struct my_error_mgr *err = (struct my_error_mgr *)cinfo->err;
831         longjmp(err->setjmp_buffer, 1);
832 }
833
834 /* stolen from public domain example.c code in libjpg distribution. */
835 static bool load_jpg(const char *file_name, TGAImageRec &tex)
836 {
837     struct jpeg_decompress_struct cinfo;
838     struct my_error_mgr jerr;
839     JSAMPROW buffer[1];         /* Output row buffer */
840     int row_stride;             /* physical row width in output buffer */
841     FILE *infile = fopen(file_name, "rb");
842
843     if (infile == NULL)
844         return false;
845
846     cinfo.err = jpeg_std_error(&jerr.pub);
847     jerr.pub.error_exit = my_error_exit;
848     if (setjmp(jerr.setjmp_buffer)) {
849         jpeg_destroy_decompress(&cinfo);
850         fclose(infile);
851         return false;
852     }
853
854     jpeg_create_decompress(&cinfo);
855     jpeg_stdio_src(&cinfo, infile);
856     (void) jpeg_read_header(&cinfo, TRUE);
857
858     cinfo.out_color_space = JCS_RGB;
859     cinfo.quantize_colors = 0;
860     (void) jpeg_calc_output_dimensions(&cinfo);
861     (void) jpeg_start_decompress(&cinfo);
862
863     row_stride = cinfo.output_width * cinfo.output_components;
864     tex.sizeX = cinfo.output_width;
865     tex.sizeY = cinfo.output_height;
866     tex.bpp = 24;
867
868     while (cinfo.output_scanline < cinfo.output_height) {
869         buffer[0] = (JSAMPROW)(char *)tex.data +
870                         ((cinfo.output_height-1) - cinfo.output_scanline) * row_stride;
871         (void) jpeg_read_scanlines(&cinfo, buffer, 1);
872     }
873
874     (void) jpeg_finish_decompress(&cinfo);
875     jpeg_destroy_decompress(&cinfo);
876     fclose(infile);
877
878     return true;
879 }
880
881
882 /* stolen from public domain example.c code in libpng distribution. */
883 static bool load_png(const char *file_name, TGAImageRec &tex)
884 {
885     bool hasalpha = false;
886     png_structp png_ptr = NULL;
887     png_infop info_ptr = NULL;
888     png_uint_32 width, height;
889     int bit_depth, color_type, interlace_type;
890     png_byte **rows = NULL;
891     bool retval = false;
892     png_byte **row_pointers = NULL;
893     FILE *fp = fopen(file_name, "rb");
894
895     if (fp == NULL)
896         return(NULL);
897
898     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
899     if (png_ptr == NULL)
900         goto png_done;
901
902     info_ptr = png_create_info_struct(png_ptr);
903     if (info_ptr == NULL)
904         goto png_done;
905
906     if (setjmp(png_jmpbuf(png_ptr)))
907         goto png_done;
908
909     png_init_io(png_ptr, fp);
910     png_read_png(png_ptr, info_ptr,
911                  PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING,
912                  NULL);
913     png_get_IHDR(png_ptr, info_ptr, &width, &height,
914                  &bit_depth, &color_type, &interlace_type, NULL, NULL);
915
916     if (bit_depth != 8)  // transform SHOULD handle this...
917         goto png_done;
918
919     if (color_type & PNG_COLOR_MASK_PALETTE)  // !!! FIXME?
920         goto png_done;
921
922     if ((color_type & PNG_COLOR_MASK_COLOR) == 0)  // !!! FIXME?
923         goto png_done;
924
925     hasalpha = ((color_type & PNG_COLOR_MASK_ALPHA) != 0);
926     row_pointers = png_get_rows(png_ptr, info_ptr);
927     if (!row_pointers)
928         goto png_done;
929
930     if (!hasalpha)
931     {
932         png_byte *dst = tex.data;
933         for (int i = height-1; i >= 0; i--)
934         {
935             png_byte *src = row_pointers[i];
936             for (int j = 0; j < width; j++)
937             {
938                 dst[0] = src[0];
939                 dst[1] = src[1];
940                 dst[2] = src[2];
941                 dst[3] = 0xFF;
942                 src += 3;
943                 dst += 4;
944             }
945         }
946     }
947
948     else
949     {
950         png_byte *dst = tex.data;
951         int pitch = width * 4;
952         for (int i = height-1; i >= 0; i--, dst += pitch)
953             memcpy(dst, row_pointers[i], pitch);
954     }
955
956     tex.sizeX = width;
957     tex.sizeY = height;
958     tex.bpp = 32;
959     retval = true;
960
961 png_done:
962     png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
963     if (fp)
964         fclose(fp);
965     return (retval);
966 }
967
968
969 bool save_image(const char *file_name)
970 {
971     const char *ptr = strrchr((char *)file_name, '.');
972     if (ptr)
973     {
974         if (strcasecmp(ptr+1, "png") == 0)
975             return save_png(file_name);
976     }
977
978     STUBBED("Unsupported image type");
979     return false;
980 }
981
982
983 static bool save_png(const char *file_name)
984 {
985     FILE *fp = NULL;
986     png_structp png_ptr = NULL;
987     png_infop info_ptr = NULL;
988     bool retval = false;
989
990     fp = fopen(file_name, "wb");
991     if (fp == NULL)
992         return false;
993
994     png_bytep *row_pointers = new png_bytep[kContextHeight];
995     png_bytep screenshot = new png_byte[kContextWidth * kContextHeight * 3];
996     if ((!screenshot) || (!row_pointers))
997         goto save_png_done;
998
999     glGetError();
1000     glReadPixels(0, 0, kContextWidth, kContextHeight,
1001                  GL_RGB, GL_UNSIGNED_BYTE, screenshot);
1002     if (glGetError() != GL_NO_ERROR)
1003         goto save_png_done;
1004
1005     for (int i = 0; i < kContextHeight; i++)
1006         row_pointers[i] = screenshot + ((kContextWidth * ((kContextHeight-1) - i)) * 3);
1007
1008     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
1009     if (png_ptr == NULL)
1010         goto save_png_done;
1011
1012     info_ptr = png_create_info_struct(png_ptr);
1013     if (info_ptr == NULL)
1014         goto save_png_done;
1015
1016     if (setjmp(png_jmpbuf(png_ptr)))
1017         goto save_png_done;
1018
1019     png_init_io(png_ptr, fp);
1020
1021     if (setjmp(png_jmpbuf(png_ptr)))
1022         goto save_png_done;
1023
1024     png_set_IHDR(png_ptr, info_ptr, kContextWidth, kContextHeight,
1025                  8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
1026                  PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
1027
1028     png_write_info(png_ptr, info_ptr);
1029
1030     if (setjmp(png_jmpbuf(png_ptr)))
1031         goto save_png_done;
1032
1033         png_write_image(png_ptr, row_pointers);
1034
1035         if (setjmp(png_jmpbuf(png_ptr)))
1036         goto save_png_done;
1037
1038     png_write_end(png_ptr, NULL);
1039     retval = true;
1040
1041 save_png_done:
1042     png_destroy_write_struct(&png_ptr, &info_ptr);
1043     delete[] screenshot;
1044     delete[] row_pointers;
1045     if (fp)
1046         fclose(fp);
1047     if (!retval)
1048         unlink(ConvertFileName(file_name));
1049     return retval;
1050 }
1051
1052
1053