video/ogl_gr.c

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