video/ogl_gr.c

   1 /*
   2  * $Source: /cvs/cvsroot/d2x/video/ogl_gr.c,v $
   3  * $Revision: 1.7 $
   4  * $Author: bradleyb $
   5  * $Date: 2001-10-25 02:23:48 $
   6  *
   7  * // OGL video functions. - Added 9/15/99 Matthew Mueller
   8  *
   9  * $Log: not supported by cvs2svn $
  10  * Revision 1.6  2001/10/18 23:59:23  bradleyb
  11  * Changed __ENV_LINUX__ to __linux__
  12  *
  13  * Revision 1.5  2001/10/12 00:18:40  bradleyb
  14  * Switched from Cygwin to mingw32 on MS boxes.  Vastly improved compilability.
  15  *
  16  * Revision 1.4  2001/01/29 13:47:52  bradleyb
  17  * Fixed build, some minor cleanups.
  18  *
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <conf.h>
  23 #endif
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28 #ifdef __WINDOWS__
  29 #include <windows.h>
  30 #endif
  31
  32 //#include <GL/gl.h>
  33 #include <unistd.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <fcntl.h>
  37 #include <errno.h>
  38
  39 #include "game.h"
  40 #include "text.h"
  41 #include "gr.h"
  42 #include "gamefont.h"
  43 #include "grdef.h"
  44 #include "palette.h"
  45 #include "u_mem.h"
  46 #include "error.h"
  47
  48 #include "inferno.h"
  49 #include "screens.h"
  50
  51 #include "strutil.h"
  52 #include "mono.h"
  53 #include "args.h"
  54 #include "key.h"
  55
  56 #include "gamefont.h"
  57
  58 #define DECLARE_VARS
  59 #include "ogl_init.h"
  60 #include <GL/glu.h>
  61
  62 int ogl_voodoohack=0;
  63
  64 int gr_installed = 0;
  65
  66
  67 void gr_palette_clear(); // Function prototype for gr_init;
  68 int gl_initialized=0;
  69 int gl_reticle=1;
  70
  71 int ogl_fullscreen=0;
  72 int gr_check_fullscreen(void){
  73         return ogl_fullscreen;
  74 }
  75 void gr_do_fullscreen(int f){
  76         if (ogl_voodoohack)
  77                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  78         else
  79                 ogl_fullscreen=f;
  80         if (gl_initialized){
  81                 ogl_do_fullscreen_internal();
  82         }
  83 }
  84 int gr_toggle_fullscreen(void){
  85         gr_do_fullscreen(!ogl_fullscreen);
  86         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  87         return ogl_fullscreen;
  88 }
  89
  90
  91 void ogl_init_state(void){
  92         /* select clearing (background) color   */
  93         glClearColor(0.0, 0.0, 0.0, 0.0);
  94         glShadeModel(GL_SMOOTH);
  95
  96         /* initialize viewing values */
  97         glMatrixMode(GL_PROJECTION);
  98         glLoadIdentity();
  99         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 100         glScalef(1.0, -1.0, 1.0);
 101         glTranslatef(0.0, -1.0, 0.0);
 102         gr_palette_step_up(0,0,0);//in case its left over from in game
 103 }
 104
 105 int last_screen_mode=-1;
 106 void ogl_set_screen_mode(void){
 107         if (last_screen_mode==Screen_mode)
 108                 return;
 109         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 110 //      OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,grd_curcanv->cv_bitmap.bm_w,grd_curcanv->cv_bitmap.bm_h);
 111         if (Screen_mode==SCREEN_GAME){
 112                 glDrawBuffer(GL_BACK);
 113         }else{
 114                 glClearColor(0.0, 0.0, 0.0, 0.0);
 115                 glDrawBuffer(GL_FRONT);
 116                 glClear(GL_COLOR_BUFFER_BIT);
 117                 glMatrixMode(GL_PROJECTION);
 118                 glLoadIdentity();//clear matrix
 119                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 120                 glMatrixMode(GL_MODELVIEW);
 121                 glLoadIdentity();//clear matrix
 122                 glEnable(GL_BLEND);
 123                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 124         }
 125         last_screen_mode=Screen_mode;
 126 }
 127 void gr_update()
 128 {
 129         if (gl_initialized){
 130
 131                 if(Screen_mode != SCREEN_GAME){
 132                         glFlush();
 133                 }
 134         }
 135 }
 136
 137 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 138 void ogl_get_verinfo(void){
 139         int t;
 140         gl_vendor=glGetString(GL_VENDOR);
 141         gl_renderer=glGetString(GL_RENDERER);
 142         gl_version=glGetString(GL_VERSION);
 143         gl_extensions=glGetString(GL_EXTENSIONS);
 144
 145         printf("gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 146
 147         ogl_intensity4_ok=1;ogl_luminance4_alpha4_ok=1;ogl_rgba2_ok=1;
 148
 149         //add driver specific hacks here.  whee.
 150         if (stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.0\n")==0 && stricmp(gl_version,"1.2 Mesa 3.0")==0){
 151                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 152                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 153         }
 154
 155         //allow overriding of stuff.
 156         if ((t=FindArg("-gl_intensity4_ok"))){
 157                 ogl_intensity4_ok=atoi(Args[t+1]);
 158         }
 159         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 160                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 161         }
 162         if ((t=FindArg("-gl_rgba2_ok"))){
 163                 ogl_rgba2_ok=atoi(Args[t+1]);
 164         }
 165         if ((t=FindArg("-gl_readpixels_ok"))){
 166                 ogl_readpixels_ok=atoi(Args[t+1]);
 167         }
 168
 169         printf("gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i\n",ogl_intensity4_ok,ogl_luminance4_alpha4_ok,ogl_rgba2_ok,ogl_readpixels_ok);
 170 }
 171
 172 int gr_set_mode(u_int32_t mode)
 173 {
 174         unsigned int w,h;
 175
 176 #ifdef NOGRAPH
 177 return 0;
 178 #endif
 179 //      mode=0;
 180         if (mode<=0)
 181                 return 0;
 182
 183         w=SM_W(mode);
 184         h=SM_H(mode);
 185
 186         //if (screen != NULL) gr_palette_clear();
 187
 188 //      ogl_init_state();
 189
 190         memset( grd_curscreen, 0, sizeof(grs_screen));
 191         grd_curscreen->sc_mode = mode;
 192         grd_curscreen->sc_w = w;
 193         grd_curscreen->sc_h = h;
 194         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 195         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 196         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 197         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 198         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 199         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 200         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 201         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 202         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 203         grd_curscreen->sc_canvas.cv_bitmap.bm_data = realloc(grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h);
 204         gr_set_current_canvas(NULL);
 205         //gr_enable_default_palette_loading();
 206
 207         ogl_init_window(w,h);//platform specific code
 208
 209         ogl_get_verinfo();
 210
 211         OGL_VIEWPORT(0,0,w,h);
 212
 213         ogl_set_screen_mode();
 214
 215         //gamefont_choose_game_font(w,h);
 216
 217         return 0;
 218 }
 219
 220 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 221 int ogl_atotexfilti(char *a,int min){
 222         GLstrcmptestr(a,NEAREST);
 223         GLstrcmptestr(a,LINEAR);
 224         if (min){//mipmaps are valid only for the min filter
 225                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 226                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 227                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 228                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 229         }
 230         Error("unknown/invalid texture filter %s\n",a);
 231 //      return GL_NEAREST;
 232 }
 233 int ogl_testneedmipmaps(int i){
 234         switch (i){
 235                 case GL_NEAREST:
 236                 case GL_LINEAR:
 237                         return 0;
 238                 case GL_NEAREST_MIPMAP_NEAREST:
 239                 case GL_NEAREST_MIPMAP_LINEAR:
 240                 case GL_LINEAR_MIPMAP_NEAREST:
 241                 case GL_LINEAR_MIPMAP_LINEAR:
 242                         return 1;
 243         }
 244         Error("unknown texture filter %x\n",i);
 245 //      return -1;
 246 }
 247 #ifdef OGL_RUNTIME_LOAD
 248 #if defined(__WINDOWS__) || defined(__MINGW32__)
 249 char *OglLibPath="opengl32.dll";
 250 #else
 251 char *OglLibPath="libGL.so";
 252 #endif
 253
 254 int ogl_rt_loaded=0;
 255 int ogl_init_load_library(void)
 256 {
 257         int retcode=0;
 258         if (!ogl_rt_loaded){
 259                 int t;
 260                 if ((t=FindArg("-gl_library")))
 261                         OglLibPath=Args[t+1];
 262
 263                 retcode = OpenGL_LoadLibrary(true);
 264                 if(retcode)
 265                 {
 266                         mprintf((0,"Opengl loaded ok\n"));
 267
 268                         if(!glEnd)
 269                         {
 270                                 Error("Opengl: Functions not imported\n");
 271                         }
 272                 }else{
 273                         Error("Opengl: error loading %s\n",OglLibPath);
 274                 }
 275                 ogl_rt_loaded=1;
 276         }
 277         return retcode;
 278 }
 279 #endif
 280
 281 int gr_init()
 282 {
 283  int mode = SM(640,480);
 284  int retcode,t,glt=0;
 285         // Only do this function once!
 286         if (gr_installed==1)
 287                 return -1;
 288
 289
 290 #ifdef OGL_RUNTIME_LOAD
 291         ogl_init_load_library();
 292 #endif
 293
 294 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 295         if (FindArg("-gl_voodoo")){
 296                 ogl_voodoohack=1;
 297                 gr_toggle_fullscreen();
 298         }
 299         if (FindArg("-fullscreen"))
 300                 gr_toggle_fullscreen();
 301 #endif
 302         if ((glt=FindArg("-gl_alttexmerge")))
 303                 ogl_alttexmerge=1;
 304         if ((t=FindArg("-gl_stdtexmerge")))
 305                 if (t>=glt)//allow overriding of earlier args
 306                         ogl_alttexmerge=0;
 307
 308         if ((glt=FindArg("-gl_16bittextures")))
 309                 ogl_rgba_format=GL_RGB5_A1;
 310
 311         if ((glt=FindArg("-gl_mipmap"))){
 312                 GL_texmagfilt=GL_LINEAR;
 313                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 314         }
 315         if ((t=FindArg("-gl_simple"))){
 316                 if (t>=glt){//allow overriding of earlier args
 317                         glt=t;
 318                         GL_texmagfilt=GL_NEAREST;
 319                         GL_texminfilt=GL_NEAREST;
 320                 }
 321         }
 322         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 323                 if (t>=glt)//allow overriding of earlier args
 324                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 325         }
 326         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 327                 if (t>=glt)//allow overriding of earlier args
 328                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 329         }
 330         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 331         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
 332
 333         if ((t=FindArg("-gl_vidmem"))){
 334                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 335         }
 336         if ((t=FindArg("-gl_reticle"))){
 337                 gl_reticle=atoi(Args[t+1]);
 338         }
 339         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 340
 341         ogl_init();//platform specific initialization
 342
 343         ogl_init_texture_list_internal();
 344
 345         MALLOC( grd_curscreen,grs_screen,1 );
 346         memset( grd_curscreen, 0, sizeof(grs_screen));
 347         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 348
 349         // Set the mode.
 350         if ((retcode=gr_set_mode(mode)))
 351         {
 352                 return retcode;
 353         }
 354         grd_curscreen->sc_canvas.cv_color = 0;
 355         grd_curscreen->sc_canvas.cv_drawmode = 0;
 356         grd_curscreen->sc_canvas.cv_font = NULL;
 357         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 358         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 359         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 360
 361         gr_installed = 1;
 362
 363         atexit(gr_close);
 364
 365         return 0;
 366 }
 367
 368 void gr_close()
 369 {
 370 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 371
 372         ogl_close();//platform specific code
 373         if (grd_curscreen){
 374                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 375                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 376                 d_free(grd_curscreen);
 377         }
 378 #ifdef OGL_RUNTIME_LOAD
 379         if (ogl_rt_loaded)
 380                 OpenGL_LoadLibrary(false);
 381 #endif
 382 }
 383 extern int r_upixelc;
 384 void ogl_upixelc(int x, int y, int c){
 385         r_upixelc++;
 386 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 387 //      if(Function_mode != FMODE_GAME){
 388 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 389 //      }else{
 390                 OGL_DISABLE(TEXTURE_2D);
 391                 glPointSize(1.0);
 392                 glBegin(GL_POINTS);
 393 //              glBegin(GL_LINES);
 394 //      ogl_pal=gr_current_pal;
 395                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 396 //      ogl_pal=gr_palette;
 397                 glVertex2f((x+grd_curcanv->cv_bitmap.bm_x)/(float)last_width,1.0-(y+grd_curcanv->cv_bitmap.bm_y)/(float)last_height);
 398 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 399                 glEnd();
 400 //      }
 401 }
 402 void ogl_urect(int left,int top,int right,int bot){
 403         GLfloat xo,yo,xf,yf;
 404         int c=COLOR;
 405
 406         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 407         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 408         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 409         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 410
 411         OGL_DISABLE(TEXTURE_2D);
 412         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 413         glBegin(GL_QUADS);
 414         glVertex2f(xo,yo);
 415         glVertex2f(xo,yf);
 416         glVertex2f(xf,yf);
 417         glVertex2f(xf,yo);
 418         glEnd();
 419 }
 420 void ogl_ulinec(int left,int top,int right,int bot,int c){
 421         GLfloat xo,yo,xf,yf;
 422
 423         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 424         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 425         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 426         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 427
 428         OGL_DISABLE(TEXTURE_2D);
 429         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 430         glBegin(GL_LINES);
 431         glVertex2f(xo,yo);
 432         glVertex2f(xf,yf);
 433         glEnd();
 434 }
 435
 436
 437 GLfloat last_r=0, last_g=0, last_b=0;
 438 int do_pal_step=0;
 439 void ogl_do_palfx(void){
 440 //      GLfloat r,g,b,a;
 441         OGL_DISABLE(TEXTURE_2D);
 442         if (gr_palette_faded_out){
 443 /*              glEnable(GL_BLEND);
 444                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 445                 glColor3f(0,0,0);
 446 //              r=g=b=0.0;a=1.0;
 447         }else{
 448                 if (do_pal_step){
 449                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 450                         glEnable(GL_BLEND);
 451                         glBlendFunc(GL_ONE,GL_ONE);
 452                         glColor3f(last_r,last_g,last_b);
 453 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 454                 }else
 455                         return;
 456         }
 457
 458
 459         glBegin(GL_QUADS);
 460         glVertex2f(0,0);
 461         glVertex2f(0,1);
 462         glVertex2f(1,1);
 463         glVertex2f(1,0);
 464         glEnd();
 465
 466         glEnable(GL_BLEND);
 467         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 468 }
 469
 470 void gr_palette_clear()
 471 {
 472         gr_palette_faded_out=1;
 473 }
 474
 475
 476 void gr_palette_step_up( int r, int g, int b )
 477 {
 478         if (gr_palette_faded_out) return;
 479
 480 //      if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
 481
 482 /*      last_r = r/63.0;
 483         last_g = g/63.0;
 484         last_b = b/63.0;
 485         do_pal_step=(r || g || b);*/
 486
 487         last_r = (r+gr_palette_gamma)/63.0;
 488         last_g = (g+gr_palette_gamma)/63.0;
 489         last_b = (b+gr_palette_gamma)/63.0;
 490
 491         do_pal_step=(r || g || b || gr_palette_gamma);
 492
 493 }
 494
 495 //added on 980913 by adb to fix palette problems
 496 // need a min without side effects...
 497 #undef min
 498 static inline int min(int x, int y) { return x < y ? x : y; }
 499 //end changes by adb
 500
 501 void gr_palette_load( ubyte *pal )
 502 {
 503  int i;//, j;
 504
 505  for (i=0; i<768; i++ ) {
 506      gr_current_pal[i] = pal[i];
 507      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 508  }
 509  //palette = screen->format->palette;
 510
 511  gr_palette_faded_out=0;
 512
 513  init_computed_colors();
 514 }
 515
 516
 517
 518 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 519 {
 520         gr_palette_faded_out=1;
 521         return 0;
 522 }
 523
 524
 525
 526 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 527 {
 528         gr_palette_faded_out=0;
 529         return 0;
 530 }
 531
 532
 533
 534 void gr_palette_read(ubyte * pal)
 535 {
 536         int i;
 537         for (i=0; i<768; i++ ) {
 538                 pal[i]=gr_current_pal[i];
 539                 if (pal[i] > 63) pal[i] = 63;
 540         }
 541 }
 542
 543 //writes out an uncompressed RGB .tga file
 544 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 545 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 546         int f;
 547 #if defined(__WINDOWS__) || defined(__MINGW32__)
 548         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR);
 549 #else
 550         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 551 #endif
 552         if (f>=0){
 553                 GLubyte    targaMagic[12] = { 0, //no identification field
 554                          0,//no colormap
 555                          2,//RGB image (well, BGR, actually)
 556                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 557                 GLubyte blah;
 558                 int r;
 559                 GLubyte *s;
 560                 int x,y;
 561
 562                 //write .TGA header.
 563                 write (f,targaMagic,sizeof(targaMagic));
 564                 blah=w%256;write (f,&blah,1);//w, low
 565                 blah=w/256;write (f,&blah,1);//w, high
 566                 blah=h%256;write (f,&blah,1);//h, low
 567                 blah=h/256;write (f,&blah,1);//h, high
 568                 blah=24;write (f,&blah,1);//24 bpp
 569                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 570
 571                 s=buf;
 572                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 573                         for (x=0;x<w;x++){
 574                                 blah=s[0];
 575                                 s[0]=s[2];
 576                                 s[2]=blah;
 577                                 s+=3;
 578                         }
 579                 }
 580                 x=0;y=w*h*3;
 581                 while (x<y){
 582                         r=write(f,buf+x,y);
 583                         if (r<=0){
 584                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 585                                 break;
 586                         }
 587                         x+=r;y-=r;
 588                 }
 589                 close(f);
 590         }else{
 591                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 592         }
 593 }
 594 void save_screen_shot(int automap_flag)
 595 {
 596 //      fix t1;
 597         char message[100];
 598         static int savenum=0;
 599         char savename[13];
 600         unsigned char *buf;
 601
 602         if (!ogl_readpixels_ok){
 603                 if (!automap_flag)
 604 //                      hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 605                 return;
 606         }
 607
 608         stop_time();
 609
 610 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 611         if ( savenum == 9999 ) savenum = 0;
 612         sprintf(savename,"scrn%04d.tga",savenum++);
 613
 614         while(!access(savename,0))
 615         {
 616                 if ( savenum == 9999 ) savenum = 0;
 617                 sprintf(savename,"scrn%04d.tga",savenum++);
 618         }
 619         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 620 //end this section addition/change - Victor Rachels
 621
 622         if (automap_flag) {
 623 //      save_font = grd_curcanv->cv_font;
 624 //      gr_set_curfont(GAME_FONT);
 625 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 626 //      gr_get_string_size(message,&w,&h,&aw);
 627 //              modex_print_message(32, 2, message);
 628         } else {
 629 //              hud_message(MSGC_GAME_FEEDBACK,message);
 630         }
 631
 632         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 633         glReadBuffer(GL_FRONT);
 634         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 635         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 636         d_free(buf);
 637
 638         key_flush();
 639         start_time();
 640 }