arch/ogl/gr.c

   1 /*
   2  * $Source: /cvs/cvsroot/d2x/arch/ogl/gr.c,v $
   3  * $Revision: 1.1 $
   4  * $Author: bradleyb $
   5  * $Date: 2001-10-25 08:25:34 $
   6  *
   7  * // OGL video functions. - Added 9/15/99 Matthew Mueller
   8  *
   9  * $Log: not supported by cvs2svn $
  10  * Revision 1.7  2001/10/25 02:23:48  bradleyb
  11  * formatting fix
  12  *
  13  * Revision 1.6  2001/10/18 23:59:23  bradleyb
  14  * Changed __ENV_LINUX__ to __linux__
  15  *
  16  * Revision 1.5  2001/10/12 00:18:40  bradleyb
  17  * Switched from Cygwin to mingw32 on MS boxes.  Vastly improved compilability.
  18  *
  19  * Revision 1.4  2001/01/29 13:47:52  bradleyb
  20  * Fixed build, some minor cleanups.
  21  *
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <conf.h>
  26 #endif
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #ifdef __WINDOWS__
  32 #include <windows.h>
  33 #endif
  34
  35 //#include <GL/gl.h>
  36 #include <unistd.h>
  37 #include <sys/types.h>
  38 #include <sys/stat.h>
  39 #include <fcntl.h>
  40 #include <errno.h>
  41
  42 #include "game.h"
  43 #include "text.h"
  44 #include "gr.h"
  45 #include "gamefont.h"
  46 #include "grdef.h"
  47 #include "palette.h"
  48 #include "u_mem.h"
  49 #include "error.h"
  50
  51 #include "inferno.h"
  52 #include "screens.h"
  53
  54 #include "strutil.h"
  55 #include "mono.h"
  56 #include "args.h"
  57 #include "key.h"
  58
  59 #include "gamefont.h"
  60
  61 #define DECLARE_VARS
  62 #include "ogl_init.h"
  63 #include <GL/glu.h>
  64
  65 int ogl_voodoohack=0;
  66
  67 int gr_installed = 0;
  68
  69
  70 void gr_palette_clear(); // Function prototype for gr_init;
  71 int gl_initialized=0;
  72 int gl_reticle=1;
  73
  74 int ogl_fullscreen=0;
  75 int gr_check_fullscreen(void){
  76         return ogl_fullscreen;
  77 }
  78 void gr_do_fullscreen(int f){
  79         if (ogl_voodoohack)
  80                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  81         else
  82                 ogl_fullscreen=f;
  83         if (gl_initialized){
  84                 ogl_do_fullscreen_internal();
  85         }
  86 }
  87 int gr_toggle_fullscreen(void){
  88         gr_do_fullscreen(!ogl_fullscreen);
  89         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  90         return ogl_fullscreen;
  91 }
  92
  93
  94 void ogl_init_state(void){
  95         /* select clearing (background) color   */
  96         glClearColor(0.0, 0.0, 0.0, 0.0);
  97         glShadeModel(GL_SMOOTH);
  98
  99         /* initialize viewing values */
 100         glMatrixMode(GL_PROJECTION);
 101         glLoadIdentity();
 102         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 103         glScalef(1.0, -1.0, 1.0);
 104         glTranslatef(0.0, -1.0, 0.0);
 105         gr_palette_step_up(0,0,0);//in case its left over from in game
 106 }
 107
 108 int last_screen_mode=-1;
 109 void ogl_set_screen_mode(void){
 110         if (last_screen_mode==Screen_mode)
 111                 return;
 112         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 113 //      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);
 114         if (Screen_mode==SCREEN_GAME){
 115                 glDrawBuffer(GL_BACK);
 116         }else{
 117                 glClearColor(0.0, 0.0, 0.0, 0.0);
 118                 glDrawBuffer(GL_FRONT);
 119                 glClear(GL_COLOR_BUFFER_BIT);
 120                 glMatrixMode(GL_PROJECTION);
 121                 glLoadIdentity();//clear matrix
 122                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 123                 glMatrixMode(GL_MODELVIEW);
 124                 glLoadIdentity();//clear matrix
 125                 glEnable(GL_BLEND);
 126                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 127         }
 128         last_screen_mode=Screen_mode;
 129 }
 130 void gr_update()
 131 {
 132         if (gl_initialized){
 133
 134                 if(Screen_mode != SCREEN_GAME){
 135                         glFlush();
 136                 }
 137         }
 138 }
 139
 140 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 141 void ogl_get_verinfo(void){
 142         int t;
 143         gl_vendor=glGetString(GL_VENDOR);
 144         gl_renderer=glGetString(GL_RENDERER);
 145         gl_version=glGetString(GL_VERSION);
 146         gl_extensions=glGetString(GL_EXTENSIONS);
 147
 148         printf("gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 149
 150         ogl_intensity4_ok=1;ogl_luminance4_alpha4_ok=1;ogl_rgba2_ok=1;
 151
 152         //add driver specific hacks here.  whee.
 153         if (stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.0\n")==0 && stricmp(gl_version,"1.2 Mesa 3.0")==0){
 154                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 155                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 156         }
 157
 158         //allow overriding of stuff.
 159         if ((t=FindArg("-gl_intensity4_ok"))){
 160                 ogl_intensity4_ok=atoi(Args[t+1]);
 161         }
 162         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 163                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 164         }
 165         if ((t=FindArg("-gl_rgba2_ok"))){
 166                 ogl_rgba2_ok=atoi(Args[t+1]);
 167         }
 168         if ((t=FindArg("-gl_readpixels_ok"))){
 169                 ogl_readpixels_ok=atoi(Args[t+1]);
 170         }
 171
 172         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);
 173 }
 174
 175 int gr_set_mode(u_int32_t mode)
 176 {
 177         unsigned int w,h;
 178
 179 #ifdef NOGRAPH
 180 return 0;
 181 #endif
 182 //      mode=0;
 183         if (mode<=0)
 184                 return 0;
 185
 186         w=SM_W(mode);
 187         h=SM_H(mode);
 188
 189         //if (screen != NULL) gr_palette_clear();
 190
 191 //      ogl_init_state();
 192
 193         memset( grd_curscreen, 0, sizeof(grs_screen));
 194         grd_curscreen->sc_mode = mode;
 195         grd_curscreen->sc_w = w;
 196         grd_curscreen->sc_h = h;
 197         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 198         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 199         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 200         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 201         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 202         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 203         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 204         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 205         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 206         grd_curscreen->sc_canvas.cv_bitmap.bm_data = realloc(grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h);
 207         gr_set_current_canvas(NULL);
 208         //gr_enable_default_palette_loading();
 209
 210         ogl_init_window(w,h);//platform specific code
 211
 212         ogl_get_verinfo();
 213
 214         OGL_VIEWPORT(0,0,w,h);
 215
 216         ogl_set_screen_mode();
 217
 218         //gamefont_choose_game_font(w,h);
 219
 220         return 0;
 221 }
 222
 223 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 224 int ogl_atotexfilti(char *a,int min){
 225         GLstrcmptestr(a,NEAREST);
 226         GLstrcmptestr(a,LINEAR);
 227         if (min){//mipmaps are valid only for the min filter
 228                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 229                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 230                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 231                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 232         }
 233         Error("unknown/invalid texture filter %s\n",a);
 234 //      return GL_NEAREST;
 235 }
 236 int ogl_testneedmipmaps(int i){
 237         switch (i){
 238                 case GL_NEAREST:
 239                 case GL_LINEAR:
 240                         return 0;
 241                 case GL_NEAREST_MIPMAP_NEAREST:
 242                 case GL_NEAREST_MIPMAP_LINEAR:
 243                 case GL_LINEAR_MIPMAP_NEAREST:
 244                 case GL_LINEAR_MIPMAP_LINEAR:
 245                         return 1;
 246         }
 247         Error("unknown texture filter %x\n",i);
 248 //      return -1;
 249 }
 250 #ifdef OGL_RUNTIME_LOAD
 251 #if defined(__WINDOWS__) || defined(__MINGW32__)
 252 char *OglLibPath="opengl32.dll";
 253 #else
 254 char *OglLibPath="libGL.so";
 255 #endif
 256
 257 int ogl_rt_loaded=0;
 258 int ogl_init_load_library(void)
 259 {
 260         int retcode=0;
 261         if (!ogl_rt_loaded){
 262                 int t;
 263                 if ((t=FindArg("-gl_library")))
 264                         OglLibPath=Args[t+1];
 265
 266                 retcode = OpenGL_LoadLibrary(true);
 267                 if(retcode)
 268                 {
 269                         mprintf((0,"Opengl loaded ok\n"));
 270
 271                         if(!glEnd)
 272                         {
 273                                 Error("Opengl: Functions not imported\n");
 274                         }
 275                 }else{
 276                         Error("Opengl: error loading %s\n",OglLibPath);
 277                 }
 278                 ogl_rt_loaded=1;
 279         }
 280         return retcode;
 281 }
 282 #endif
 283
 284 int gr_init()
 285 {
 286  int mode = SM(640,480);
 287  int retcode,t,glt=0;
 288         // Only do this function once!
 289         if (gr_installed==1)
 290                 return -1;
 291
 292
 293 #ifdef OGL_RUNTIME_LOAD
 294         ogl_init_load_library();
 295 #endif
 296
 297 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 298         if (FindArg("-gl_voodoo")){
 299                 ogl_voodoohack=1;
 300                 gr_toggle_fullscreen();
 301         }
 302         if (FindArg("-fullscreen"))
 303                 gr_toggle_fullscreen();
 304 #endif
 305         if ((glt=FindArg("-gl_alttexmerge")))
 306                 ogl_alttexmerge=1;
 307         if ((t=FindArg("-gl_stdtexmerge")))
 308                 if (t>=glt)//allow overriding of earlier args
 309                         ogl_alttexmerge=0;
 310
 311         if ((glt=FindArg("-gl_16bittextures")))
 312                 ogl_rgba_format=GL_RGB5_A1;
 313
 314         if ((glt=FindArg("-gl_mipmap"))){
 315                 GL_texmagfilt=GL_LINEAR;
 316                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 317         }
 318         if ((t=FindArg("-gl_simple"))){
 319                 if (t>=glt){//allow overriding of earlier args
 320                         glt=t;
 321                         GL_texmagfilt=GL_NEAREST;
 322                         GL_texminfilt=GL_NEAREST;
 323                 }
 324         }
 325         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 326                 if (t>=glt)//allow overriding of earlier args
 327                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 328         }
 329         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 330                 if (t>=glt)//allow overriding of earlier args
 331                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 332         }
 333         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 334         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
 335
 336         if ((t=FindArg("-gl_vidmem"))){
 337                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 338         }
 339         if ((t=FindArg("-gl_reticle"))){
 340                 gl_reticle=atoi(Args[t+1]);
 341         }
 342         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 343
 344         ogl_init();//platform specific initialization
 345
 346         ogl_init_texture_list_internal();
 347
 348         MALLOC( grd_curscreen,grs_screen,1 );
 349         memset( grd_curscreen, 0, sizeof(grs_screen));
 350         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 351
 352         // Set the mode.
 353         if ((retcode=gr_set_mode(mode)))
 354         {
 355                 return retcode;
 356         }
 357         grd_curscreen->sc_canvas.cv_color = 0;
 358         grd_curscreen->sc_canvas.cv_drawmode = 0;
 359         grd_curscreen->sc_canvas.cv_font = NULL;
 360         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 361         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 362         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 363
 364         gr_installed = 1;
 365
 366         atexit(gr_close);
 367
 368         return 0;
 369 }
 370
 371 void gr_close()
 372 {
 373 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 374
 375         ogl_close();//platform specific code
 376         if (grd_curscreen){
 377                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 378                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 379                 d_free(grd_curscreen);
 380         }
 381 #ifdef OGL_RUNTIME_LOAD
 382         if (ogl_rt_loaded)
 383                 OpenGL_LoadLibrary(false);
 384 #endif
 385 }
 386 extern int r_upixelc;
 387 void ogl_upixelc(int x, int y, int c){
 388         r_upixelc++;
 389 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 390 //      if(Function_mode != FMODE_GAME){
 391 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 392 //      }else{
 393                 OGL_DISABLE(TEXTURE_2D);
 394                 glPointSize(1.0);
 395                 glBegin(GL_POINTS);
 396 //              glBegin(GL_LINES);
 397 //      ogl_pal=gr_current_pal;
 398                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 399 //      ogl_pal=gr_palette;
 400                 glVertex2f((x+grd_curcanv->cv_bitmap.bm_x)/(float)last_width,1.0-(y+grd_curcanv->cv_bitmap.bm_y)/(float)last_height);
 401 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 402                 glEnd();
 403 //      }
 404 }
 405 void ogl_urect(int left,int top,int right,int bot){
 406         GLfloat xo,yo,xf,yf;
 407         int c=COLOR;
 408
 409         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 410         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 411         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 412         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 413
 414         OGL_DISABLE(TEXTURE_2D);
 415         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 416         glBegin(GL_QUADS);
 417         glVertex2f(xo,yo);
 418         glVertex2f(xo,yf);
 419         glVertex2f(xf,yf);
 420         glVertex2f(xf,yo);
 421         glEnd();
 422 }
 423 void ogl_ulinec(int left,int top,int right,int bot,int c){
 424         GLfloat xo,yo,xf,yf;
 425
 426         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 427         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 428         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 429         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 430
 431         OGL_DISABLE(TEXTURE_2D);
 432         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 433         glBegin(GL_LINES);
 434         glVertex2f(xo,yo);
 435         glVertex2f(xf,yf);
 436         glEnd();
 437 }
 438
 439
 440 GLfloat last_r=0, last_g=0, last_b=0;
 441 int do_pal_step=0;
 442 void ogl_do_palfx(void){
 443 //      GLfloat r,g,b,a;
 444         OGL_DISABLE(TEXTURE_2D);
 445         if (gr_palette_faded_out){
 446 /*              glEnable(GL_BLEND);
 447                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 448                 glColor3f(0,0,0);
 449 //              r=g=b=0.0;a=1.0;
 450         }else{
 451                 if (do_pal_step){
 452                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 453                         glEnable(GL_BLEND);
 454                         glBlendFunc(GL_ONE,GL_ONE);
 455                         glColor3f(last_r,last_g,last_b);
 456 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 457                 }else
 458                         return;
 459         }
 460
 461
 462         glBegin(GL_QUADS);
 463         glVertex2f(0,0);
 464         glVertex2f(0,1);
 465         glVertex2f(1,1);
 466         glVertex2f(1,0);
 467         glEnd();
 468
 469         glEnable(GL_BLEND);
 470         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 471 }
 472
 473 void gr_palette_clear()
 474 {
 475         gr_palette_faded_out=1;
 476 }
 477
 478
 479 void gr_palette_step_up( int r, int g, int b )
 480 {
 481         if (gr_palette_faded_out) return;
 482
 483 //      if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
 484
 485 /*      last_r = r/63.0;
 486         last_g = g/63.0;
 487         last_b = b/63.0;
 488         do_pal_step=(r || g || b);*/
 489
 490         last_r = (r+gr_palette_gamma)/63.0;
 491         last_g = (g+gr_palette_gamma)/63.0;
 492         last_b = (b+gr_palette_gamma)/63.0;
 493
 494         do_pal_step=(r || g || b || gr_palette_gamma);
 495
 496 }
 497
 498 //added on 980913 by adb to fix palette problems
 499 // need a min without side effects...
 500 #undef min
 501 static inline int min(int x, int y) { return x < y ? x : y; }
 502 //end changes by adb
 503
 504 void gr_palette_load( ubyte *pal )
 505 {
 506  int i;//, j;
 507
 508  for (i=0; i<768; i++ ) {
 509      gr_current_pal[i] = pal[i];
 510      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 511  }
 512  //palette = screen->format->palette;
 513
 514  gr_palette_faded_out=0;
 515
 516  init_computed_colors();
 517 }
 518
 519
 520
 521 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 522 {
 523         gr_palette_faded_out=1;
 524         return 0;
 525 }
 526
 527
 528
 529 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 530 {
 531         gr_palette_faded_out=0;
 532         return 0;
 533 }
 534
 535
 536
 537 void gr_palette_read(ubyte * pal)
 538 {
 539         int i;
 540         for (i=0; i<768; i++ ) {
 541                 pal[i]=gr_current_pal[i];
 542                 if (pal[i] > 63) pal[i] = 63;
 543         }
 544 }
 545
 546 //writes out an uncompressed RGB .tga file
 547 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 548 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 549         int f;
 550 #if defined(__WINDOWS__) || defined(__MINGW32__)
 551         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR);
 552 #else
 553         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 554 #endif
 555         if (f>=0){
 556                 GLubyte    targaMagic[12] = { 0, //no identification field
 557                          0,//no colormap
 558                          2,//RGB image (well, BGR, actually)
 559                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 560                 GLubyte blah;
 561                 int r;
 562                 GLubyte *s;
 563                 int x,y;
 564
 565                 //write .TGA header.
 566                 write (f,targaMagic,sizeof(targaMagic));
 567                 blah=w%256;write (f,&blah,1);//w, low
 568                 blah=w/256;write (f,&blah,1);//w, high
 569                 blah=h%256;write (f,&blah,1);//h, low
 570                 blah=h/256;write (f,&blah,1);//h, high
 571                 blah=24;write (f,&blah,1);//24 bpp
 572                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 573
 574                 s=buf;
 575                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 576                         for (x=0;x<w;x++){
 577                                 blah=s[0];
 578                                 s[0]=s[2];
 579                                 s[2]=blah;
 580                                 s+=3;
 581                         }
 582                 }
 583                 x=0;y=w*h*3;
 584                 while (x<y){
 585                         r=write(f,buf+x,y);
 586                         if (r<=0){
 587                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 588                                 break;
 589                         }
 590                         x+=r;y-=r;
 591                 }
 592                 close(f);
 593         }else{
 594                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 595         }
 596 }
 597 void save_screen_shot(int automap_flag)
 598 {
 599 //      fix t1;
 600         char message[100];
 601         static int savenum=0;
 602         char savename[13];
 603         unsigned char *buf;
 604
 605         if (!ogl_readpixels_ok){
 606                 if (!automap_flag)
 607 //                      hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 608                 return;
 609         }
 610
 611         stop_time();
 612
 613 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 614         if ( savenum == 9999 ) savenum = 0;
 615         sprintf(savename,"scrn%04d.tga",savenum++);
 616
 617         while(!access(savename,0))
 618         {
 619                 if ( savenum == 9999 ) savenum = 0;
 620                 sprintf(savename,"scrn%04d.tga",savenum++);
 621         }
 622         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 623 //end this section addition/change - Victor Rachels
 624
 625         if (automap_flag) {
 626 //      save_font = grd_curcanv->cv_font;
 627 //      gr_set_curfont(GAME_FONT);
 628 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 629 //      gr_get_string_size(message,&w,&h,&aw);
 630 //              modex_print_message(32, 2, message);
 631         } else {
 632 //              hud_message(MSGC_GAME_FEEDBACK,message);
 633         }
 634
 635         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 636         glReadBuffer(GL_FRONT);
 637         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 638         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 639         d_free(buf);
 640
 641         key_flush();
 642         start_time();
 643 }