arch/ogl/gr.c

   1 /*
   2  * $Source: /cvs/cvsroot/d2x/arch/ogl/gr.c,v $
   3  * $Revision: 1.3 $
   4  * $Author: bradleyb $
   5  * $Date: 2001-11-04 09:00:25 $
   6  *
   7  * // OGL video functions. - Added 9/15/99 Matthew Mueller
   8  *
   9  * $Log: not supported by cvs2svn $
  10  * Revision 1.2  2001/10/31 07:35:47  bradleyb
  11  * Sync with d1x
  12  *
  13  * Revision 1.1  2001/10/25 08:25:34  bradleyb
  14  * Finished moving stuff to arch/blah.  I know, it's ugly, but It'll be easier to sync with d1x.
  15  *
  16  * Revision 1.7  2001/10/25 02:23:48  bradleyb
  17  * formatting fix
  18  *
  19  * Revision 1.6  2001/10/18 23:59:23  bradleyb
  20  * Changed __ENV_LINUX__ to __linux__
  21  *
  22  * Revision 1.5  2001/10/12 00:18:40  bradleyb
  23  * Switched from Cygwin to mingw32 on MS boxes.  Vastly improved compilability.
  24  *
  25  * Revision 1.4  2001/01/29 13:47:52  bradleyb
  26  * Fixed build, some minor cleanups.
  27  *
  28  */
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include <conf.h>
  32 #endif
  33
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37 #ifdef __WINDOWS__
  38 #include <windows.h>
  39 #endif
  40
  41 //#include <GL/gl.h>
  42 #include <unistd.h>
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45 #include <fcntl.h>
  46 #include <errno.h>
  47
  48 #include "hudmsg.h"
  49 #include "game.h"
  50 #include "text.h"
  51 #include "gr.h"
  52 #include "gamefont.h"
  53 #include "grdef.h"
  54 #include "palette.h"
  55 #include "u_mem.h"
  56 #include "error.h"
  57
  58 #include "inferno.h"
  59 #include "screens.h"
  60
  61 #include "strutil.h"
  62 #include "mono.h"
  63 #include "args.h"
  64 #include "key.h"
  65
  66 #define DECLARE_VARS
  67 #include "ogl_init.h"
  68 #include <GL/glu.h>
  69
  70 int ogl_voodoohack=0;
  71
  72 int gr_installed = 0;
  73
  74
  75 void gr_palette_clear(); // Function prototype for gr_init;
  76 int gl_initialized=0;
  77 int gl_reticle=1;
  78
  79 int ogl_fullscreen=0;
  80
  81 int gr_check_fullscreen(void){
  82         return ogl_fullscreen;
  83 }
  84
  85 void gr_do_fullscreen(int f){
  86         if (ogl_voodoohack)
  87                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  88         else
  89                 ogl_fullscreen=f;
  90         if (gl_initialized){
  91                 ogl_do_fullscreen_internal();
  92         }
  93 }
  94
  95 int gr_toggle_fullscreen(void){
  96         gr_do_fullscreen(!ogl_fullscreen);
  97         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  98         return ogl_fullscreen;
  99 }
 100
 101 int arch_toggle_fullscreen_menu(void){
 102         unsigned char *buf=NULL;
 103
 104         if (ogl_readpixels_ok){
 105                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 106                 glReadBuffer(GL_FRONT);
 107                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 108         }
 109
 110         gr_do_fullscreen(!ogl_fullscreen);
 111
 112         if (ogl_readpixels_ok){
 113 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 114                 glRasterPos2f(0,0);
 115                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 116                 free(buf);
 117         }
 118         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 119
 120         return ogl_fullscreen;
 121 }
 122
 123 void ogl_init_state(void){
 124         /* select clearing (background) color   */
 125         glClearColor(0.0, 0.0, 0.0, 0.0);
 126         glShadeModel(GL_SMOOTH);
 127
 128         /* initialize viewing values */
 129         glMatrixMode(GL_PROJECTION);
 130         glLoadIdentity();
 131         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 132         glScalef(1.0, -1.0, 1.0);
 133         glTranslatef(0.0, -1.0, 0.0);
 134         gr_palette_step_up(0,0,0);//in case its left over from in game
 135 }
 136
 137 int last_screen_mode=-1;
 138
 139 void ogl_set_screen_mode(void){
 140         if (last_screen_mode==Screen_mode)
 141                 return;
 142         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 143 //      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);
 144         if (Screen_mode==SCREEN_GAME){
 145                 glDrawBuffer(GL_BACK);
 146         }else{
 147                 glClearColor(0.0, 0.0, 0.0, 0.0);
 148                 glDrawBuffer(GL_FRONT);
 149                 glClear(GL_COLOR_BUFFER_BIT);
 150                 glMatrixMode(GL_PROJECTION);
 151                 glLoadIdentity();//clear matrix
 152                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 153                 glMatrixMode(GL_MODELVIEW);
 154                 glLoadIdentity();//clear matrix
 155                 glEnable(GL_BLEND);
 156                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 157         }
 158         last_screen_mode=Screen_mode;
 159 }
 160
 161 void gr_update()
 162 {
 163         if (gl_initialized){
 164
 165                 if(Screen_mode != SCREEN_GAME){
 166                         glFlush();
 167                 }
 168         }
 169 }
 170
 171 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 172
 173 void ogl_get_verinfo(void){
 174         int t;
 175         gl_vendor=glGetString(GL_VENDOR);
 176         gl_renderer=glGetString(GL_RENDERER);
 177         gl_version=glGetString(GL_VERSION);
 178         gl_extensions=glGetString(GL_EXTENSIONS);
 179
 180         printf("gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 181
 182         ogl_intensity4_ok=1;ogl_luminance4_alpha4_ok=1;ogl_rgba2_ok=1;ogl_gettexlevelparam_ok=1;
 183
 184 #ifdef __WINDOWS__
 185         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 186         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 187         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 188         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 189 #endif
 190
 191         //multitexturing doesn't work yet.
 192 #ifdef GL_ARB_multitexture
 193         ogl_arb_multitexture_ok=0;//(strstr(gl_extensions,"GL_ARB_multitexture")!=0 && glActiveTextureARB!=0 && 0);
 194         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 195 #endif
 196 #ifdef GL_SGIS_multitexture
 197         ogl_sgis_multitexture_ok=0;//(strstr(gl_extensions,"GL_SGIS_multitexture")!=0 && glSelectTextureSGIS!=0 && 0);
 198         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 199 #endif
 200
 201         //add driver specific hacks here.  whee.
 202         if ((stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.0\n")==0 || stricmp(gl_renderer,"Mesa NVIDIA RIVA 1.2\n")==0) && stricmp(gl_version,"1.2 Mesa 3.0")==0){
 203                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 204                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 205                 ogl_gettexlevelparam_ok=0;//returns random data..
 206         }
 207         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 208                 //displays garbage. reported by
 209                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 210                 //  orulz (Matrox G200)
 211                 ogl_intensity4_ok=0;
 212         }
 213
 214         //allow overriding of stuff.
 215 #ifdef GL_ARB_multitexture
 216         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 217                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 218         }
 219 #endif
 220 #ifdef GL_SGIS_multitexture
 221         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 222                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 223         }
 224 #endif
 225         if ((t=FindArg("-gl_intensity4_ok"))){
 226                 ogl_intensity4_ok=atoi(Args[t+1]);
 227         }
 228         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 229                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 230         }
 231         if ((t=FindArg("-gl_rgba2_ok"))){
 232                 ogl_rgba2_ok=atoi(Args[t+1]);
 233         }
 234         if ((t=FindArg("-gl_readpixels_ok"))){
 235                 ogl_readpixels_ok=atoi(Args[t+1]);
 236         }
 237         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 238                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 239         }
 240
 241         printf("gl_arb_multitexture:%i gl_sgis_multitexture:%i\n",ogl_arb_multitexture_ok,ogl_sgis_multitexture_ok);
 242         printf("gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i\n",ogl_intensity4_ok,ogl_luminance4_alpha4_ok,ogl_rgba2_ok,ogl_readpixels_ok,ogl_gettexlevelparam_ok);
 243 }
 244
 245 int gr_set_mode(u_int32_t mode)
 246 {
 247         unsigned int w,h;
 248         char *gr_bm_data;
 249
 250 #ifdef NOGRAPH
 251 return 0;
 252 #endif
 253 //      mode=0;
 254         if (mode<=0)
 255                 return 0;
 256
 257         w=SM_W(mode);
 258         h=SM_H(mode);
 259
 260         //if (screen != NULL) gr_palette_clear();
 261
 262 //      ogl_init_state();
 263
 264         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 265         memset( grd_curscreen, 0, sizeof(grs_screen));
 266         grd_curscreen->sc_mode = mode;
 267         grd_curscreen->sc_w = w;
 268         grd_curscreen->sc_h = h;
 269         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 270         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 271         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 272         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 273         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 274         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 275         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 276         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 277         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 278 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 279         grd_curscreen->sc_canvas.cv_bitmap.bm_data = realloc(gr_bm_data,w*h);
 280         gr_set_current_canvas(NULL);
 281         //gr_enable_default_palette_loading();
 282
 283         ogl_init_window(w,h);//platform specific code
 284
 285         ogl_get_verinfo();
 286
 287         OGL_VIEWPORT(0,0,w,h);
 288
 289         ogl_set_screen_mode();
 290
 291 //      gamefont_choose_game_font(w,h);
 292
 293         return 0;
 294 }
 295
 296 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 297 int ogl_atotexfilti(char *a,int min){
 298         GLstrcmptestr(a,NEAREST);
 299         GLstrcmptestr(a,LINEAR);
 300         if (min){//mipmaps are valid only for the min filter
 301                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 302                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 303                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 304                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 305         }
 306         Error("unknown/invalid texture filter %s\n",a);
 307 //      return GL_NEAREST;
 308 }
 309 int ogl_testneedmipmaps(int i){
 310         switch (i){
 311                 case GL_NEAREST:
 312                 case GL_LINEAR:
 313                         return 0;
 314                 case GL_NEAREST_MIPMAP_NEAREST:
 315                 case GL_NEAREST_MIPMAP_LINEAR:
 316                 case GL_LINEAR_MIPMAP_NEAREST:
 317                 case GL_LINEAR_MIPMAP_LINEAR:
 318                         return 1;
 319         }
 320         Error("unknown texture filter %x\n",i);
 321 //      return -1;
 322 }
 323 #ifdef OGL_RUNTIME_LOAD
 324 #if defined(__WINDOWS__) || defined(__MINGW32__)
 325 char *OglLibPath="opengl32.dll";
 326 #endif
 327 #ifdef __linux__
 328 char *OglLibPath="libGL.so";
 329 #endif
 330
 331 int ogl_rt_loaded=0;
 332 int ogl_init_load_library(void)
 333 {
 334         int retcode=0;
 335         if (!ogl_rt_loaded){
 336                 int t;
 337                 if ((t=FindArg("-gl_library")))
 338                         OglLibPath=Args[t+1];
 339
 340                 retcode = OpenGL_LoadLibrary(true);
 341                 if(retcode)
 342                 {
 343                         mprintf((0,"Opengl loaded ok\n"));
 344
 345                         if(!glEnd)
 346                         {
 347                                 Error("Opengl: Functions not imported\n");
 348                         }
 349                 }else{
 350                         Error("Opengl: error loading %s\n",OglLibPath);
 351                 }
 352                 ogl_rt_loaded=1;
 353         }
 354         return retcode;
 355 }
 356 #endif
 357
 358 int gr_init()
 359 {
 360  int mode = SM(640,480);
 361  int retcode,t,glt=0;
 362         // Only do this function once!
 363         if (gr_installed==1)
 364                 return -1;
 365
 366
 367 #ifdef OGL_RUNTIME_LOAD
 368         ogl_init_load_library();
 369 #endif
 370
 371 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 372         if (FindArg("-gl_voodoo")){
 373                 ogl_voodoohack=1;
 374                 gr_toggle_fullscreen();
 375         }
 376         if (FindArg("-fullscreen"))
 377                 gr_toggle_fullscreen();
 378 #endif
 379         if ((glt=FindArg("-gl_alttexmerge")))
 380                 ogl_alttexmerge=1;
 381         if ((t=FindArg("-gl_stdtexmerge")))
 382                 if (t>=glt)//allow overriding of earlier args
 383                         ogl_alttexmerge=0;
 384
 385         if ((glt=FindArg("-gl_16bittextures")))
 386                 ogl_rgba_format=GL_RGB5_A1;
 387
 388         if ((glt=FindArg("-gl_mipmap"))){
 389                 GL_texmagfilt=GL_LINEAR;
 390                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 391         }
 392         if ((t=FindArg("-gl_simple"))){
 393                 if (t>=glt){//allow overriding of earlier args
 394                         glt=t;
 395                         GL_texmagfilt=GL_NEAREST;
 396                         GL_texminfilt=GL_NEAREST;
 397                 }
 398         }
 399         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 400                 if (t>=glt)//allow overriding of earlier args
 401                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 402         }
 403         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 404                 if (t>=glt)//allow overriding of earlier args
 405                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 406         }
 407         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 408         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
 409
 410         if ((t=FindArg("-gl_vidmem"))){
 411                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 412         }
 413         if ((t=FindArg("-gl_reticle"))){
 414                 gl_reticle=atoi(Args[t+1]);
 415         }
 416         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 417
 418         ogl_init();//platform specific initialization
 419
 420         ogl_init_texture_list_internal();
 421
 422         MALLOC( grd_curscreen,grs_screen,1 );
 423         memset( grd_curscreen, 0, sizeof(grs_screen));
 424         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 425
 426         // Set the mode.
 427         if ((retcode=gr_set_mode(mode)))
 428         {
 429                 return retcode;
 430         }
 431         grd_curscreen->sc_canvas.cv_color = 0;
 432         grd_curscreen->sc_canvas.cv_drawmode = 0;
 433         grd_curscreen->sc_canvas.cv_font = NULL;
 434         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 435         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 436         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 437
 438         gr_installed = 1;
 439
 440         atexit(gr_close);
 441
 442         return 0;
 443 }
 444
 445 void gr_close()
 446 {
 447 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 448
 449         ogl_close();//platform specific code
 450         if (grd_curscreen){
 451                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 452                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 453                 d_free(grd_curscreen);
 454         }
 455 #ifdef OGL_RUNTIME_LOAD
 456         if (ogl_rt_loaded)
 457                 OpenGL_LoadLibrary(false);
 458 #endif
 459 }
 460 extern int r_upixelc;
 461 void ogl_upixelc(int x, int y, int c){
 462         r_upixelc++;
 463 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 464 //      if(Function_mode != FMODE_GAME){
 465 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 466 //      }else{
 467                 OGL_DISABLE(TEXTURE_2D);
 468                 glPointSize(1.0);
 469                 glBegin(GL_POINTS);
 470 //              glBegin(GL_LINES);
 471 //      ogl_pal=gr_current_pal;
 472                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 473 //      ogl_pal=gr_palette;
 474                 glVertex2f((x+grd_curcanv->cv_bitmap.bm_x)/(float)last_width,1.0-(y+grd_curcanv->cv_bitmap.bm_y)/(float)last_height);
 475 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 476                 glEnd();
 477 //      }
 478 }
 479 void ogl_urect(int left,int top,int right,int bot){
 480         GLfloat xo,yo,xf,yf;
 481         int c=COLOR;
 482
 483         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 484         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 485         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 486         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 487
 488         OGL_DISABLE(TEXTURE_2D);
 489         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 490         glBegin(GL_QUADS);
 491         glVertex2f(xo,yo);
 492         glVertex2f(xo,yf);
 493         glVertex2f(xf,yf);
 494         glVertex2f(xf,yo);
 495         glEnd();
 496 }
 497 void ogl_ulinec(int left,int top,int right,int bot,int c){
 498         GLfloat xo,yo,xf,yf;
 499
 500         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 501         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 502         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 503         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 504
 505         OGL_DISABLE(TEXTURE_2D);
 506         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 507         glBegin(GL_LINES);
 508         glVertex2f(xo,yo);
 509         glVertex2f(xf,yf);
 510         glEnd();
 511 }
 512
 513
 514 GLfloat last_r=0, last_g=0, last_b=0;
 515 int do_pal_step=0;
 516 void ogl_do_palfx(void){
 517 //      GLfloat r,g,b,a;
 518         OGL_DISABLE(TEXTURE_2D);
 519         if (gr_palette_faded_out){
 520 /*              glEnable(GL_BLEND);
 521                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 522                 glColor3f(0,0,0);
 523 //              r=g=b=0.0;a=1.0;
 524         }else{
 525                 if (do_pal_step){
 526                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 527                         glEnable(GL_BLEND);
 528                         glBlendFunc(GL_ONE,GL_ONE);
 529                         glColor3f(last_r,last_g,last_b);
 530 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 531                 }else
 532                         return;
 533         }
 534
 535
 536         glBegin(GL_QUADS);
 537         glVertex2f(0,0);
 538         glVertex2f(0,1);
 539         glVertex2f(1,1);
 540         glVertex2f(1,0);
 541         glEnd();
 542
 543         glEnable(GL_BLEND);
 544         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 545 }
 546
 547 void gr_palette_clear()
 548 {
 549         gr_palette_faded_out=1;
 550 }
 551
 552
 553 void gr_palette_step_up( int r, int g, int b )
 554 {
 555         if (gr_palette_faded_out) return;
 556
 557 //      if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
 558
 559 /*      last_r = r/63.0;
 560         last_g = g/63.0;
 561         last_b = b/63.0;
 562         do_pal_step=(r || g || b);*/
 563
 564         last_r = (r+gr_palette_gamma)/63.0;
 565         last_g = (g+gr_palette_gamma)/63.0;
 566         last_b = (b+gr_palette_gamma)/63.0;
 567
 568         do_pal_step=(r || g || b || gr_palette_gamma);
 569
 570 }
 571
 572 //added on 980913 by adb to fix palette problems
 573 // need a min without side effects...
 574 #undef min
 575 static inline int min(int x, int y) { return x < y ? x : y; }
 576 //end changes by adb
 577
 578 void gr_palette_load( ubyte *pal )
 579 {
 580  int i;//, j;
 581
 582  for (i=0; i<768; i++ ) {
 583      gr_current_pal[i] = pal[i];
 584      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 585  }
 586  //palette = screen->format->palette;
 587
 588  gr_palette_faded_out=0;
 589
 590  init_computed_colors();
 591 }
 592
 593
 594
 595 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 596 {
 597         gr_palette_faded_out=1;
 598         return 0;
 599 }
 600
 601
 602
 603 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 604 {
 605         gr_palette_faded_out=0;
 606         return 0;
 607 }
 608
 609
 610
 611 void gr_palette_read(ubyte * pal)
 612 {
 613         int i;
 614         for (i=0; i<768; i++ ) {
 615                 pal[i]=gr_current_pal[i];
 616                 if (pal[i] > 63) pal[i] = 63;
 617         }
 618 }
 619
 620 //writes out an uncompressed RGB .tga file
 621 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 622 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 623         int f;
 624 #if defined(__WINDOWS__) || defined(__MINGW32__)
 625         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR);
 626 #else
 627         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 628 #endif
 629         if (f>=0){
 630                 GLubyte    targaMagic[12] = { 0, //no identification field
 631                          0,//no colormap
 632                          2,//RGB image (well, BGR, actually)
 633                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 634                 GLubyte blah;
 635                 int r;
 636                 GLubyte *s;
 637                 int x,y;
 638
 639                 //write .TGA header.
 640                 write (f,targaMagic,sizeof(targaMagic));
 641                 blah=w%256;write (f,&blah,1);//w, low
 642                 blah=w/256;write (f,&blah,1);//w, high
 643                 blah=h%256;write (f,&blah,1);//h, low
 644                 blah=h/256;write (f,&blah,1);//h, high
 645                 blah=24;write (f,&blah,1);//24 bpp
 646                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 647
 648                 s=buf;
 649                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 650                         for (x=0;x<w;x++){
 651                                 blah=s[0];
 652                                 s[0]=s[2];
 653                                 s[2]=blah;
 654                                 s+=3;
 655                         }
 656                 }
 657                 x=0;y=w*h*3;
 658                 while (x<y){
 659                         r=write(f,buf+x,y);
 660                         if (r<=0){
 661                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 662                                 break;
 663                         }
 664                         x+=r;y-=r;
 665                 }
 666                 close(f);
 667         }else{
 668                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 669         }
 670 }
 671 void save_screen_shot(int automap_flag)
 672 {
 673 //      fix t1;
 674         char message[100];
 675         static int savenum=0;
 676         char savename[13];
 677         unsigned char *buf;
 678
 679         if (!ogl_readpixels_ok){
 680                 if (!automap_flag)
 681                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 682                 return;
 683         }
 684
 685         stop_time();
 686
 687 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 688         if ( savenum == 9999 ) savenum = 0;
 689         sprintf(savename,"scrn%04d.tga",savenum++);
 690
 691         while(!access(savename,0))
 692         {
 693                 if ( savenum == 9999 ) savenum = 0;
 694                 sprintf(savename,"scrn%04d.tga",savenum++);
 695         }
 696         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 697 //end this section addition/change - Victor Rachels
 698
 699         if (automap_flag) {
 700 //      save_font = grd_curcanv->cv_font;
 701 //      gr_set_curfont(GAME_FONT);
 702 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 703 //      gr_get_string_size(message,&w,&h,&aw);
 704 //              modex_print_message(32, 2, message);
 705         } else {
 706                 hud_message(MSGC_GAME_FEEDBACK,message);
 707         }
 708
 709         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 710         glReadBuffer(GL_FRONT);
 711         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 712         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 713         d_free(buf);
 714
 715         key_flush();
 716         start_time();
 717 }