arch/ogl/gr.c

   1 /*
   2  * $Source: /cvs/cvsroot/d2x/arch/ogl/gr.c,v $
   3  * $Revision: 1.5 $
   4  * $Author: bradleyb $
   5  * $Date: 2001-11-09 06:53:37 $
   6  *
   7  * // OGL video functions. - Added 9/15/99 Matthew Mueller
   8  *
   9  * $Log: not supported by cvs2svn $
  10  * Revision 1.4  2001/11/08 10:19:52  bradleyb
  11  * use new d_realloc function, so mem manager doesn't die
  12  *
  13  * Revision 1.3  2001/11/04 09:00:25  bradleyb
  14  * Enable d1x-style hud_message
  15  *
  16  * Revision 1.2  2001/10/31 07:35:47  bradleyb
  17  * Sync with d1x
  18  *
  19  * Revision 1.1  2001/10/25 08:25:34  bradleyb
  20  * Finished moving stuff to arch/blah.  I know, it's ugly, but It'll be easier to sync with d1x.
  21  *
  22  * Revision 1.7  2001/10/25 02:23:48  bradleyb
  23  * formatting fix
  24  *
  25  * Revision 1.6  2001/10/18 23:59:23  bradleyb
  26  * Changed __ENV_LINUX__ to __linux__
  27  *
  28  * Revision 1.5  2001/10/12 00:18:40  bradleyb
  29  * Switched from Cygwin to mingw32 on MS boxes.  Vastly improved compilability.
  30  *
  31  * Revision 1.4  2001/01/29 13:47:52  bradleyb
  32  * Fixed build, some minor cleanups.
  33  *
  34  */
  35
  36 #ifdef HAVE_CONFIG_H
  37 #include <conf.h>
  38 #endif
  39
  40 #include <stdlib.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43 #ifdef __WINDOWS__
  44 #include <windows.h>
  45 #endif
  46
  47 //#include <GL/gl.h>
  48 #include <unistd.h>
  49 #include <sys/types.h>
  50 #include <sys/stat.h>
  51 #include <fcntl.h>
  52 #include <errno.h>
  53
  54 #include "hudmsg.h"
  55 #include "game.h"
  56 #include "text.h"
  57 #include "gr.h"
  58 #include "gamefont.h"
  59 #include "grdef.h"
  60 #include "palette.h"
  61 #include "u_mem.h"
  62 #include "error.h"
  63
  64 #include "inferno.h"
  65 #include "screens.h"
  66
  67 #include "strutil.h"
  68 #include "mono.h"
  69 #include "args.h"
  70 #include "key.h"
  71
  72 #define DECLARE_VARS
  73 #include "ogl_init.h"
  74 #include <GL/glu.h>
  75
  76 int ogl_voodoohack=0;
  77
  78 int gr_installed = 0;
  79
  80
  81 void gr_palette_clear(); // Function prototype for gr_init;
  82 int gl_initialized=0;
  83 int gl_reticle=1;
  84
  85 int ogl_fullscreen=0;
  86
  87 int gr_check_fullscreen(void){
  88         return ogl_fullscreen;
  89 }
  90
  91 void gr_do_fullscreen(int f){
  92         if (ogl_voodoohack)
  93                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  94         else
  95                 ogl_fullscreen=f;
  96         if (gl_initialized){
  97                 ogl_do_fullscreen_internal();
  98         }
  99 }
 100
 101 int gr_toggle_fullscreen(void){
 102         gr_do_fullscreen(!ogl_fullscreen);
 103         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 104         return ogl_fullscreen;
 105 }
 106
 107 int arch_toggle_fullscreen_menu(void){
 108         unsigned char *buf=NULL;
 109
 110         if (ogl_readpixels_ok){
 111                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 112                 glReadBuffer(GL_FRONT);
 113                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 114         }
 115
 116         gr_do_fullscreen(!ogl_fullscreen);
 117
 118         if (ogl_readpixels_ok){
 119 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 120                 glRasterPos2f(0,0);
 121                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 122                 free(buf);
 123         }
 124         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 125
 126         return ogl_fullscreen;
 127 }
 128
 129 void ogl_init_state(void){
 130         /* select clearing (background) color   */
 131         glClearColor(0.0, 0.0, 0.0, 0.0);
 132         glShadeModel(GL_SMOOTH);
 133
 134         /* initialize viewing values */
 135         glMatrixMode(GL_PROJECTION);
 136         glLoadIdentity();
 137         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 138         glScalef(1.0, -1.0, 1.0);
 139         glTranslatef(0.0, -1.0, 0.0);
 140         gr_palette_step_up(0,0,0);//in case its left over from in game
 141 }
 142
 143 int last_screen_mode=-1;
 144
 145 void ogl_set_screen_mode(void){
 146         if (last_screen_mode==Screen_mode)
 147                 return;
 148         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 149 //      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);
 150         if (Screen_mode==SCREEN_GAME){
 151                 glDrawBuffer(GL_BACK);
 152         }else{
 153                 glClearColor(0.0, 0.0, 0.0, 0.0);
 154                 glDrawBuffer(GL_FRONT);
 155                 glClear(GL_COLOR_BUFFER_BIT);
 156                 glMatrixMode(GL_PROJECTION);
 157                 glLoadIdentity();//clear matrix
 158                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 159                 glMatrixMode(GL_MODELVIEW);
 160                 glLoadIdentity();//clear matrix
 161                 glEnable(GL_BLEND);
 162                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 163         }
 164         last_screen_mode=Screen_mode;
 165 }
 166
 167 void gr_update()
 168 {
 169         if (gl_initialized){
 170
 171                 if(Screen_mode != SCREEN_GAME){
 172                         glFlush();
 173                 }
 174         }
 175 }
 176
 177 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 178
 179 void ogl_get_verinfo(void){
 180         int t;
 181         gl_vendor=glGetString(GL_VENDOR);
 182         gl_renderer=glGetString(GL_RENDERER);
 183         gl_version=glGetString(GL_VERSION);
 184         gl_extensions=glGetString(GL_EXTENSIONS);
 185
 186         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 187
 188         ogl_intensity4_ok=1;ogl_luminance4_alpha4_ok=1;ogl_rgba2_ok=1;ogl_gettexlevelparam_ok=1;
 189
 190 #ifdef __WINDOWS__
 191         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 192         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 193         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 194         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 195 #endif
 196
 197         //multitexturing doesn't work yet.
 198 #ifdef GL_ARB_multitexture
 199         ogl_arb_multitexture_ok=0;//(strstr(gl_extensions,"GL_ARB_multitexture")!=0 && glActiveTextureARB!=0 && 0);
 200         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 201 #endif
 202 #ifdef GL_SGIS_multitexture
 203         ogl_sgis_multitexture_ok=0;//(strstr(gl_extensions,"GL_SGIS_multitexture")!=0 && glSelectTextureSGIS!=0 && 0);
 204         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 205 #endif
 206
 207         //add driver specific hacks here.  whee.
 208         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){
 209                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 210                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 211                 ogl_gettexlevelparam_ok=0;//returns random data..
 212         }
 213         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 214                 //displays garbage. reported by
 215                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 216                 //  orulz (Matrox G200)
 217                 ogl_intensity4_ok=0;
 218         }
 219
 220         //allow overriding of stuff.
 221 #ifdef GL_ARB_multitexture
 222         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 223                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 224         }
 225 #endif
 226 #ifdef GL_SGIS_multitexture
 227         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 228                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 229         }
 230 #endif
 231         if ((t=FindArg("-gl_intensity4_ok"))){
 232                 ogl_intensity4_ok=atoi(Args[t+1]);
 233         }
 234         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 235                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 236         }
 237         if ((t=FindArg("-gl_rgba2_ok"))){
 238                 ogl_rgba2_ok=atoi(Args[t+1]);
 239         }
 240         if ((t=FindArg("-gl_readpixels_ok"))){
 241                 ogl_readpixels_ok=atoi(Args[t+1]);
 242         }
 243         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 244                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 245         }
 246
 247         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i gl_sgis_multitexture:%i\n",ogl_arb_multitexture_ok,ogl_sgis_multitexture_ok);
 248         con_printf(CON_VERBOSE, "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);
 249 }
 250
 251 int gr_set_mode(u_int32_t mode)
 252 {
 253         unsigned int w,h;
 254         char *gr_bm_data;
 255
 256 #ifdef NOGRAPH
 257 return 0;
 258 #endif
 259 //      mode=0;
 260         if (mode<=0)
 261                 return 0;
 262
 263         w=SM_W(mode);
 264         h=SM_H(mode);
 265
 266         //if (screen != NULL) gr_palette_clear();
 267
 268 //      ogl_init_state();
 269
 270         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 271         memset( grd_curscreen, 0, sizeof(grs_screen));
 272         grd_curscreen->sc_mode = mode;
 273         grd_curscreen->sc_w = w;
 274         grd_curscreen->sc_h = h;
 275         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 276         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 277         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 278         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 279         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 280         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 281         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 282         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 283         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 284 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 285         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 286         gr_set_current_canvas(NULL);
 287         //gr_enable_default_palette_loading();
 288
 289         ogl_init_window(w,h);//platform specific code
 290
 291         ogl_get_verinfo();
 292
 293         OGL_VIEWPORT(0,0,w,h);
 294
 295         ogl_set_screen_mode();
 296
 297 //      gamefont_choose_game_font(w,h);
 298
 299         return 0;
 300 }
 301
 302 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 303 int ogl_atotexfilti(char *a,int min){
 304         GLstrcmptestr(a,NEAREST);
 305         GLstrcmptestr(a,LINEAR);
 306         if (min){//mipmaps are valid only for the min filter
 307                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 308                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 309                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 310                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 311         }
 312         Error("unknown/invalid texture filter %s\n",a);
 313 //      return GL_NEAREST;
 314 }
 315 int ogl_testneedmipmaps(int i){
 316         switch (i){
 317                 case GL_NEAREST:
 318                 case GL_LINEAR:
 319                         return 0;
 320                 case GL_NEAREST_MIPMAP_NEAREST:
 321                 case GL_NEAREST_MIPMAP_LINEAR:
 322                 case GL_LINEAR_MIPMAP_NEAREST:
 323                 case GL_LINEAR_MIPMAP_LINEAR:
 324                         return 1;
 325         }
 326         Error("unknown texture filter %x\n",i);
 327 //      return -1;
 328 }
 329 #ifdef OGL_RUNTIME_LOAD
 330 #if defined(__WINDOWS__) || defined(__MINGW32__)
 331 char *OglLibPath="opengl32.dll";
 332 #endif
 333 #ifdef __linux__
 334 char *OglLibPath="libGL.so";
 335 #endif
 336
 337 int ogl_rt_loaded=0;
 338 int ogl_init_load_library(void)
 339 {
 340         int retcode=0;
 341         if (!ogl_rt_loaded){
 342                 int t;
 343                 if ((t=FindArg("-gl_library")))
 344                         OglLibPath=Args[t+1];
 345
 346                 retcode = OpenGL_LoadLibrary(true);
 347                 if(retcode)
 348                 {
 349                         mprintf((0,"Opengl loaded ok\n"));
 350
 351                         if(!glEnd)
 352                         {
 353                                 Error("Opengl: Functions not imported\n");
 354                         }
 355                 }else{
 356                         Error("Opengl: error loading %s\n",OglLibPath);
 357                 }
 358                 ogl_rt_loaded=1;
 359         }
 360         return retcode;
 361 }
 362 #endif
 363
 364 int gr_init()
 365 {
 366  int mode = SM(640,480);
 367  int retcode,t,glt=0;
 368         // Only do this function once!
 369         if (gr_installed==1)
 370                 return -1;
 371
 372
 373 #ifdef OGL_RUNTIME_LOAD
 374         ogl_init_load_library();
 375 #endif
 376
 377 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 378         if (FindArg("-gl_voodoo")){
 379                 ogl_voodoohack=1;
 380                 gr_toggle_fullscreen();
 381         }
 382         if (FindArg("-fullscreen"))
 383                 gr_toggle_fullscreen();
 384 #endif
 385         if ((glt=FindArg("-gl_alttexmerge")))
 386                 ogl_alttexmerge=1;
 387         if ((t=FindArg("-gl_stdtexmerge")))
 388                 if (t>=glt)//allow overriding of earlier args
 389                         ogl_alttexmerge=0;
 390
 391         if ((glt=FindArg("-gl_16bittextures")))
 392                 ogl_rgba_format=GL_RGB5_A1;
 393
 394         if ((glt=FindArg("-gl_mipmap"))){
 395                 GL_texmagfilt=GL_LINEAR;
 396                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 397         }
 398         if ((t=FindArg("-gl_simple"))){
 399                 if (t>=glt){//allow overriding of earlier args
 400                         glt=t;
 401                         GL_texmagfilt=GL_NEAREST;
 402                         GL_texminfilt=GL_NEAREST;
 403                 }
 404         }
 405         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 406                 if (t>=glt)//allow overriding of earlier args
 407                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 408         }
 409         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 410                 if (t>=glt)//allow overriding of earlier args
 411                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 412         }
 413         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 414         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
 415
 416         if ((t=FindArg("-gl_vidmem"))){
 417                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 418         }
 419         if ((t=FindArg("-gl_reticle"))){
 420                 gl_reticle=atoi(Args[t+1]);
 421         }
 422         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 423
 424         ogl_init();//platform specific initialization
 425
 426         ogl_init_texture_list_internal();
 427
 428         MALLOC( grd_curscreen,grs_screen,1 );
 429         memset( grd_curscreen, 0, sizeof(grs_screen));
 430         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 431
 432         // Set the mode.
 433         if ((retcode=gr_set_mode(mode)))
 434         {
 435                 return retcode;
 436         }
 437         grd_curscreen->sc_canvas.cv_color = 0;
 438         grd_curscreen->sc_canvas.cv_drawmode = 0;
 439         grd_curscreen->sc_canvas.cv_font = NULL;
 440         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 441         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 442         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 443
 444         gr_installed = 1;
 445
 446         atexit(gr_close);
 447
 448         return 0;
 449 }
 450
 451 void gr_close()
 452 {
 453 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 454
 455         ogl_close();//platform specific code
 456         if (grd_curscreen){
 457                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 458                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 459                 d_free(grd_curscreen);
 460         }
 461 #ifdef OGL_RUNTIME_LOAD
 462         if (ogl_rt_loaded)
 463                 OpenGL_LoadLibrary(false);
 464 #endif
 465 }
 466 extern int r_upixelc;
 467 void ogl_upixelc(int x, int y, int c){
 468         r_upixelc++;
 469 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 470 //      if(Function_mode != FMODE_GAME){
 471 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 472 //      }else{
 473                 OGL_DISABLE(TEXTURE_2D);
 474                 glPointSize(1.0);
 475                 glBegin(GL_POINTS);
 476 //              glBegin(GL_LINES);
 477 //      ogl_pal=gr_current_pal;
 478                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 479 //      ogl_pal=gr_palette;
 480                 glVertex2f((x+grd_curcanv->cv_bitmap.bm_x)/(float)last_width,1.0-(y+grd_curcanv->cv_bitmap.bm_y)/(float)last_height);
 481 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 482                 glEnd();
 483 //      }
 484 }
 485 void ogl_urect(int left,int top,int right,int bot){
 486         GLfloat xo,yo,xf,yf;
 487         int c=COLOR;
 488
 489         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 490         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 491         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 492         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 493
 494         OGL_DISABLE(TEXTURE_2D);
 495         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 496         glBegin(GL_QUADS);
 497         glVertex2f(xo,yo);
 498         glVertex2f(xo,yf);
 499         glVertex2f(xf,yf);
 500         glVertex2f(xf,yo);
 501         glEnd();
 502 }
 503 void ogl_ulinec(int left,int top,int right,int bot,int c){
 504         GLfloat xo,yo,xf,yf;
 505
 506         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 507         xf=(right+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 508         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 509         yf=1.0-(bot+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 510
 511         OGL_DISABLE(TEXTURE_2D);
 512         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 513         glBegin(GL_LINES);
 514         glVertex2f(xo,yo);
 515         glVertex2f(xf,yf);
 516         glEnd();
 517 }
 518
 519
 520 GLfloat last_r=0, last_g=0, last_b=0;
 521 int do_pal_step=0;
 522 void ogl_do_palfx(void){
 523 //      GLfloat r,g,b,a;
 524         OGL_DISABLE(TEXTURE_2D);
 525         if (gr_palette_faded_out){
 526 /*              glEnable(GL_BLEND);
 527                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 528                 glColor3f(0,0,0);
 529 //              r=g=b=0.0;a=1.0;
 530         }else{
 531                 if (do_pal_step){
 532                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 533                         glEnable(GL_BLEND);
 534                         glBlendFunc(GL_ONE,GL_ONE);
 535                         glColor3f(last_r,last_g,last_b);
 536 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 537                 }else
 538                         return;
 539         }
 540
 541
 542         glBegin(GL_QUADS);
 543         glVertex2f(0,0);
 544         glVertex2f(0,1);
 545         glVertex2f(1,1);
 546         glVertex2f(1,0);
 547         glEnd();
 548
 549         glEnable(GL_BLEND);
 550         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 551 }
 552
 553 void gr_palette_clear()
 554 {
 555         gr_palette_faded_out=1;
 556 }
 557
 558
 559 void gr_palette_step_up( int r, int g, int b )
 560 {
 561         if (gr_palette_faded_out) return;
 562
 563 //      if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
 564
 565 /*      last_r = r/63.0;
 566         last_g = g/63.0;
 567         last_b = b/63.0;
 568         do_pal_step=(r || g || b);*/
 569
 570         last_r = (r+gr_palette_gamma)/63.0;
 571         last_g = (g+gr_palette_gamma)/63.0;
 572         last_b = (b+gr_palette_gamma)/63.0;
 573
 574         do_pal_step=(r || g || b || gr_palette_gamma);
 575
 576 }
 577
 578 //added on 980913 by adb to fix palette problems
 579 // need a min without side effects...
 580 #undef min
 581 static inline int min(int x, int y) { return x < y ? x : y; }
 582 //end changes by adb
 583
 584 void gr_palette_load( ubyte *pal )
 585 {
 586  int i;//, j;
 587
 588  for (i=0; i<768; i++ ) {
 589      gr_current_pal[i] = pal[i];
 590      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 591  }
 592  //palette = screen->format->palette;
 593
 594  gr_palette_faded_out=0;
 595
 596  init_computed_colors();
 597 }
 598
 599
 600
 601 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 602 {
 603         gr_palette_faded_out=1;
 604         return 0;
 605 }
 606
 607
 608
 609 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 610 {
 611         gr_palette_faded_out=0;
 612         return 0;
 613 }
 614
 615
 616
 617 void gr_palette_read(ubyte * pal)
 618 {
 619         int i;
 620         for (i=0; i<768; i++ ) {
 621                 pal[i]=gr_current_pal[i];
 622                 if (pal[i] > 63) pal[i] = 63;
 623         }
 624 }
 625
 626 //writes out an uncompressed RGB .tga file
 627 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 628 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 629         int f;
 630 #if defined(__WINDOWS__) || defined(__MINGW32__)
 631         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR);
 632 #else
 633         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 634 #endif
 635         if (f>=0){
 636                 GLubyte    targaMagic[12] = { 0, //no identification field
 637                          0,//no colormap
 638                          2,//RGB image (well, BGR, actually)
 639                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 640                 GLubyte blah;
 641                 int r;
 642                 GLubyte *s;
 643                 int x,y;
 644
 645                 //write .TGA header.
 646                 write (f,targaMagic,sizeof(targaMagic));
 647                 blah=w%256;write (f,&blah,1);//w, low
 648                 blah=w/256;write (f,&blah,1);//w, high
 649                 blah=h%256;write (f,&blah,1);//h, low
 650                 blah=h/256;write (f,&blah,1);//h, high
 651                 blah=24;write (f,&blah,1);//24 bpp
 652                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 653
 654                 s=buf;
 655                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 656                         for (x=0;x<w;x++){
 657                                 blah=s[0];
 658                                 s[0]=s[2];
 659                                 s[2]=blah;
 660                                 s+=3;
 661                         }
 662                 }
 663                 x=0;y=w*h*3;
 664                 while (x<y){
 665                         r=write(f,buf+x,y);
 666                         if (r<=0){
 667                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 668                                 break;
 669                         }
 670                         x+=r;y-=r;
 671                 }
 672                 close(f);
 673         }else{
 674                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 675         }
 676 }
 677 void save_screen_shot(int automap_flag)
 678 {
 679 //      fix t1;
 680         char message[100];
 681         static int savenum=0;
 682         char savename[13];
 683         unsigned char *buf;
 684
 685         if (!ogl_readpixels_ok){
 686                 if (!automap_flag)
 687                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 688                 return;
 689         }
 690
 691         stop_time();
 692
 693 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 694         if ( savenum == 9999 ) savenum = 0;
 695         sprintf(savename,"scrn%04d.tga",savenum++);
 696
 697         while(!access(savename,0))
 698         {
 699                 if ( savenum == 9999 ) savenum = 0;
 700                 sprintf(savename,"scrn%04d.tga",savenum++);
 701         }
 702         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 703 //end this section addition/change - Victor Rachels
 704
 705         if (automap_flag) {
 706 //      save_font = grd_curcanv->cv_font;
 707 //      gr_set_curfont(GAME_FONT);
 708 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 709 //      gr_get_string_size(message,&w,&h,&aw);
 710 //              modex_print_message(32, 2, message);
 711         } else {
 712                 hud_message(MSGC_GAME_FEEDBACK,message);
 713         }
 714
 715         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 716         glReadBuffer(GL_FRONT);
 717         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 718         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 719         d_free(buf);
 720
 721         key_flush();
 722         start_time();
 723 }