arch/ogl/gr.c

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