arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.21 2004-05-20 02:04:26 btb Exp $ */
   2 /*
   3  *
   4  * OGL video functions. - Added 9/15/99 Matthew Mueller
   5  *
   6  *
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <conf.h>
  11 #endif
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #ifdef _MSC_VER
  17 #include <windows.h>
  18 #endif
  19
  20 #if defined(__APPLE__) && defined(__MACH__)
  21 //#include <OpenGL/gl.h>
  22 #else
  23 //#include <GL/gl.h>
  24 #endif
  25 #ifndef _MSC_VER
  26 #include <unistd.h>
  27 #endif
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fcntl.h>
  31 #include <errno.h>
  32
  33 #include "hudmsg.h"
  34 #include "game.h"
  35 #include "text.h"
  36 #include "gr.h"
  37 #include "gamefont.h"
  38 #include "grdef.h"
  39 #include "palette.h"
  40 #include "u_mem.h"
  41 #include "error.h"
  42
  43 #include "inferno.h"
  44 #include "screens.h"
  45
  46 #include "strutil.h"
  47 #include "mono.h"
  48 #include "args.h"
  49 #include "key.h"
  50
  51 #define DECLARE_VARS
  52 #include "internal.h"
  53 #if defined(__APPLE__) && defined(__MACH__)
  54 #include <OpenGL/glu.h>
  55 #undef GL_ARB_multitexture // hack!
  56 #else
  57 #include <GL/glu.h>
  58 #endif
  59
  60 int ogl_voodoohack=0;
  61
  62 int gr_installed = 0;
  63
  64
  65 void gr_palette_clear(); // Function prototype for gr_init;
  66 int gl_initialized=0;
  67 int gl_reticle = 0;
  68
  69 int ogl_fullscreen=0;
  70
  71 int gr_check_fullscreen(void){
  72         return ogl_fullscreen;
  73 }
  74
  75 void gr_do_fullscreen(int f){
  76         if (ogl_voodoohack)
  77                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  78         else
  79                 ogl_fullscreen=f;
  80         if (gl_initialized){
  81                 ogl_do_fullscreen_internal();
  82         }
  83 }
  84
  85 int gr_toggle_fullscreen(void){
  86         gr_do_fullscreen(!ogl_fullscreen);
  87         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  88         return ogl_fullscreen;
  89 }
  90
  91 int arch_toggle_fullscreen_menu(void){
  92         unsigned char *buf=NULL;
  93
  94         if (ogl_readpixels_ok){
  95                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  96                 glReadBuffer(GL_FRONT);
  97                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  98         }
  99
 100         gr_do_fullscreen(!ogl_fullscreen);
 101
 102         if (ogl_readpixels_ok){
 103 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 104                 glRasterPos2f(0,0);
 105                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 106                 free(buf);
 107         }
 108         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 109
 110         return ogl_fullscreen;
 111 }
 112
 113 void ogl_init_state(void){
 114         /* select clearing (background) color   */
 115         glClearColor(0.0, 0.0, 0.0, 0.0);
 116         glShadeModel(GL_SMOOTH);
 117
 118         /* initialize viewing values */
 119         glMatrixMode(GL_PROJECTION);
 120         glLoadIdentity();
 121         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 122         glScalef(1.0, -1.0, 1.0);
 123         glTranslatef(0.0, -1.0, 0.0);
 124         gr_palette_step_up(0,0,0);//in case its left over from in game
 125 }
 126
 127 int last_screen_mode=-1;
 128
 129 void ogl_set_screen_mode(void){
 130         if (last_screen_mode==Screen_mode)
 131                 return;
 132         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 133 //      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);
 134         if (Screen_mode==SCREEN_GAME){
 135                 glDrawBuffer(GL_BACK);
 136         }else{
 137                 glClearColor(0.0, 0.0, 0.0, 0.0);
 138                 glDrawBuffer(GL_FRONT);
 139                 glClear(GL_COLOR_BUFFER_BIT);
 140                 glMatrixMode(GL_PROJECTION);
 141                 glLoadIdentity();//clear matrix
 142                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 143                 glMatrixMode(GL_MODELVIEW);
 144                 glLoadIdentity();//clear matrix
 145                 glEnable(GL_BLEND);
 146                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 147         }
 148         last_screen_mode=Screen_mode;
 149 }
 150
 151 void gr_update()
 152 {
 153         if (gl_initialized){
 154
 155                 if(Screen_mode != SCREEN_GAME){
 156                         glFlush();
 157                 }
 158         }
 159 }
 160
 161 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 162
 163 void ogl_get_verinfo(void){
 164         int t;
 165         gl_vendor=glGetString(GL_VENDOR);
 166         gl_renderer=glGetString(GL_RENDERER);
 167         gl_version=glGetString(GL_VERSION);
 168         gl_extensions=glGetString(GL_EXTENSIONS);
 169
 170         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 171
 172         ogl_intensity4_ok = 1;
 173         ogl_luminance4_alpha4_ok = 1;
 174         ogl_rgba2_ok = 1;
 175         ogl_gettexlevelparam_ok = 1;
 176         ogl_setgammaramp_ok = 1;
 177
 178 #if 0 //WGL only, I think
 179         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 180         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 181         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 182         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 183 #endif
 184
 185         //multitexturing doesn't work yet.
 186 #ifdef GL_ARB_multitexture
 187         ogl_arb_multitexture_ok=0;//(strstr(gl_extensions,"GL_ARB_multitexture")!=0 && glActiveTextureARB!=0 && 0);
 188         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 189 #endif
 190 #ifdef GL_SGIS_multitexture
 191         ogl_sgis_multitexture_ok=0;//(strstr(gl_extensions,"GL_SGIS_multitexture")!=0 && glSelectTextureSGIS!=0 && 0);
 192         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 193 #endif
 194
 195         //add driver specific hacks here.  whee.
 196         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){
 197                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 198                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 199                 ogl_gettexlevelparam_ok=0;//returns random data..
 200         }
 201         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 202                 //displays garbage. reported by
 203                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 204                 //  orulz (Matrox G200)
 205                 ogl_intensity4_ok=0;
 206         }
 207
 208         //allow overriding of stuff.
 209 #ifdef GL_ARB_multitexture
 210         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 211                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 212         }
 213 #endif
 214 #ifdef GL_SGIS_multitexture
 215         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 216                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 217         }
 218 #endif
 219         if ((t=FindArg("-gl_intensity4_ok"))){
 220                 ogl_intensity4_ok=atoi(Args[t+1]);
 221         }
 222         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 223                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 224         }
 225         if ((t=FindArg("-gl_rgba2_ok"))){
 226                 ogl_rgba2_ok=atoi(Args[t+1]);
 227         }
 228         if ((t=FindArg("-gl_readpixels_ok"))){
 229                 ogl_readpixels_ok=atoi(Args[t+1]);
 230         }
 231         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 232                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 233         }
 234         if ((t=FindArg("-gl_setgammaramp_ok")))
 235         {
 236                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 237         }
 238
 239         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i gl_sgis_multitexture:%i\n",ogl_arb_multitexture_ok,ogl_sgis_multitexture_ok);
 240         con_printf(CON_VERBOSE, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i gl_setgammaramp_ok:%i\n",ogl_intensity4_ok,ogl_luminance4_alpha4_ok,ogl_rgba2_ok,ogl_readpixels_ok,ogl_gettexlevelparam_ok, ogl_setgammaramp_ok);
 241 }
 242
 243
 244 int gr_check_mode(u_int32_t mode)
 245 {
 246         int w, h;
 247
 248         w = SM_W(mode);
 249         h = SM_H(mode);
 250         return ogl_check_mode(w, h); // platform specific code
 251 }
 252
 253
 254 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 255
 256 int gr_set_mode(u_int32_t mode)
 257 {
 258         unsigned int w,h;
 259         char *gr_bm_data;
 260
 261 #ifdef NOGRAPH
 262 return 0;
 263 #endif
 264 //      mode=0;
 265         if (mode<=0)
 266                 return 0;
 267
 268         w=SM_W(mode);
 269         h=SM_H(mode);
 270         VGA_current_mode = mode;
 271
 272         //if (screen != NULL) gr_palette_clear();
 273
 274 //      ogl_init_state();
 275
 276         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 277         memset( grd_curscreen, 0, sizeof(grs_screen));
 278         grd_curscreen->sc_mode = mode;
 279         grd_curscreen->sc_w = w;
 280         grd_curscreen->sc_h = h;
 281         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 282         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 283         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 284         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 285         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 286         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 287         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 288         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 289         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 290 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 291         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 292         gr_set_current_canvas(NULL);
 293         //gr_enable_default_palette_loading();
 294
 295         ogl_init_window(w,h);//platform specific code
 296
 297         ogl_get_verinfo();
 298
 299         OGL_VIEWPORT(0,0,w,h);
 300
 301         ogl_set_screen_mode();
 302
 303 //      gamefont_choose_game_font(w,h);
 304
 305         return 0;
 306 }
 307
 308 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 309 int ogl_atotexfilti(char *a,int min){
 310         GLstrcmptestr(a,NEAREST);
 311         GLstrcmptestr(a,LINEAR);
 312         if (min){//mipmaps are valid only for the min filter
 313                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 314                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 315                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 316                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 317         }
 318         Error("unknown/invalid texture filter %s\n",a);
 319 //      return GL_NEAREST;
 320 }
 321 int ogl_testneedmipmaps(int i){
 322         switch (i){
 323                 case GL_NEAREST:
 324                 case GL_LINEAR:
 325                         return 0;
 326                 case GL_NEAREST_MIPMAP_NEAREST:
 327                 case GL_NEAREST_MIPMAP_LINEAR:
 328                 case GL_LINEAR_MIPMAP_NEAREST:
 329                 case GL_LINEAR_MIPMAP_LINEAR:
 330                         return 1;
 331         }
 332         Error("unknown texture filter %x\n",i);
 333 //      return -1;
 334 }
 335 #ifdef OGL_RUNTIME_LOAD
 336 #ifdef _WIN32
 337 char *OglLibPath="opengl32.dll";
 338 #endif
 339 #ifdef __unix__
 340 char *OglLibPath="libGL.so";
 341 #endif
 342
 343 int ogl_rt_loaded=0;
 344 int ogl_init_load_library(void)
 345 {
 346         int retcode=0;
 347         if (!ogl_rt_loaded){
 348                 int t;
 349                 if ((t=FindArg("-gl_library")))
 350                         OglLibPath=Args[t+1];
 351
 352                 retcode = OpenGL_LoadLibrary(true);
 353                 if(retcode)
 354                 {
 355                         mprintf((0,"Opengl loaded ok\n"));
 356
 357                         if(!glEnd)
 358                         {
 359                                 Error("Opengl: Functions not imported\n");
 360                         }
 361                 }else{
 362                         Error("Opengl: error loading %s\n",OglLibPath);
 363                 }
 364                 ogl_rt_loaded=1;
 365         }
 366         return retcode;
 367 }
 368 #endif
 369
 370 int gr_init()
 371 {
 372         int mode = SM(640,480);
 373         int retcode, t, glt = 0;
 374
 375         // Only do this function once!
 376         if (gr_installed==1)
 377                 return -1;
 378
 379
 380 #ifdef OGL_RUNTIME_LOAD
 381         ogl_init_load_library();
 382 #endif
 383
 384 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 385         if (FindArg("-gl_voodoo")){
 386                 ogl_voodoohack=1;
 387                 gr_toggle_fullscreen();
 388         }
 389         if (FindArg("-fullscreen"))
 390                 gr_toggle_fullscreen();
 391 #endif
 392         if ((glt=FindArg("-gl_alttexmerge")))
 393                 ogl_alttexmerge=1;
 394         if ((t=FindArg("-gl_stdtexmerge")))
 395                 if (t>=glt)//allow overriding of earlier args
 396                         ogl_alttexmerge=0;
 397
 398         if ((glt=FindArg("-gl_16bittextures")))
 399                 ogl_rgba_format=GL_RGB5_A1;
 400
 401         if ((glt=FindArg("-gl_mipmap"))){
 402                 GL_texmagfilt=GL_LINEAR;
 403                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 404         }
 405         if ((glt=FindArg("-gl_trilinear")))
 406         {
 407                 GL_texmagfilt = GL_LINEAR;
 408                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 409         }
 410         if ((t=FindArg("-gl_simple"))){
 411                 if (t>=glt){//allow overriding of earlier args
 412                         glt=t;
 413                         GL_texmagfilt=GL_NEAREST;
 414                         GL_texminfilt=GL_NEAREST;
 415                 }
 416         }
 417         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 418                 if (t>=glt)//allow overriding of earlier args
 419                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 420         }
 421         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 422                 if (t>=glt)//allow overriding of earlier args
 423                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 424         }
 425         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 426         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
 427
 428         if ((t=FindArg("-gl_vidmem"))){
 429                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 430         }
 431         if ((t=FindArg("-gl_reticle"))){
 432                 gl_reticle=atoi(Args[t+1]);
 433         }
 434         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 435
 436         ogl_init();//platform specific initialization
 437
 438         ogl_init_texture_list_internal();
 439
 440         MALLOC( grd_curscreen,grs_screen,1 );
 441         memset( grd_curscreen, 0, sizeof(grs_screen));
 442         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 443
 444         // Set the mode.
 445         if ((retcode=gr_set_mode(mode)))
 446         {
 447                 return retcode;
 448         }
 449
 450         grd_curscreen->sc_canvas.cv_color = 0;
 451         grd_curscreen->sc_canvas.cv_drawmode = 0;
 452         grd_curscreen->sc_canvas.cv_font = NULL;
 453         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 454         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 455         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 456
 457         gr_installed = 1;
 458
 459         atexit(gr_close);
 460
 461         return 0;
 462 }
 463
 464 void gr_close()
 465 {
 466 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 467
 468         ogl_close();//platform specific code
 469         if (grd_curscreen){
 470                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 471                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 472                 d_free(grd_curscreen);
 473         }
 474 #ifdef OGL_RUNTIME_LOAD
 475         if (ogl_rt_loaded)
 476                 OpenGL_LoadLibrary(false);
 477 #endif
 478 }
 479 extern int r_upixelc;
 480 void ogl_upixelc(int x, int y, int c){
 481         r_upixelc++;
 482 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 483 //      if(Function_mode != FMODE_GAME){
 484 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 485 //      }else{
 486                 OGL_DISABLE(TEXTURE_2D);
 487                 glPointSize(1.0);
 488                 glBegin(GL_POINTS);
 489 //              glBegin(GL_LINES);
 490 //      ogl_pal=gr_current_pal;
 491                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 492 //      ogl_pal=gr_palette;
 493                 glVertex2f((x + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width, 1.0 - (y + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height);
 494 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 495                 glEnd();
 496 //      }
 497 }
 498 void ogl_urect(int left,int top,int right,int bot){
 499         GLfloat xo,yo,xf,yf;
 500         int c=COLOR;
 501
 502         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 503         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 504         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 505         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 506
 507         OGL_DISABLE(TEXTURE_2D);
 508         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 509         glBegin(GL_QUADS);
 510         glVertex2f(xo,yo);
 511         glVertex2f(xo,yf);
 512         glVertex2f(xf,yf);
 513         glVertex2f(xf,yo);
 514         glEnd();
 515 }
 516 void ogl_ulinec(int left,int top,int right,int bot,int c){
 517         GLfloat xo,yo,xf,yf;
 518
 519         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 520         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 521         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 522         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 523
 524         OGL_DISABLE(TEXTURE_2D);
 525         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 526         glBegin(GL_LINES);
 527         glVertex2f(xo,yo);
 528         glVertex2f(xf,yf);
 529         glEnd();
 530 }
 531
 532
 533 GLfloat last_r=0, last_g=0, last_b=0;
 534 int do_pal_step=0;
 535 void ogl_do_palfx(void){
 536 //      GLfloat r,g,b,a;
 537         OGL_DISABLE(TEXTURE_2D);
 538         if (gr_palette_faded_out){
 539 /*              glEnable(GL_BLEND);
 540                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 541                 glColor3f(0,0,0);
 542 //              r=g=b=0.0;a=1.0;
 543         }else{
 544                 if (do_pal_step){
 545                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 546                         glEnable(GL_BLEND);
 547                         glBlendFunc(GL_ONE,GL_ONE);
 548                         glColor3f(last_r,last_g,last_b);
 549 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 550                 }else
 551                         return;
 552         }
 553
 554
 555         glBegin(GL_QUADS);
 556         glVertex2f(0,0);
 557         glVertex2f(0,1);
 558         glVertex2f(1,1);
 559         glVertex2f(1,0);
 560         glEnd();
 561
 562         glEnable(GL_BLEND);
 563         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 564 }
 565
 566 void gr_palette_clear()
 567 {
 568         gr_palette_faded_out=1;
 569 }
 570
 571
 572 int ogl_brightness_ok = 0;
 573 int ogl_setgammaramp_ok = 1;
 574 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 575 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 576
 577 void gr_palette_step_up(int r, int g, int b)
 578 {
 579         if (gr_palette_faded_out)
 580                 return;
 581
 582         old_b_r = ogl_brightness_r;
 583         old_b_g = ogl_brightness_g;
 584         old_b_b = ogl_brightness_b;
 585
 586         ogl_brightness_r = r + gr_palette_gamma;
 587         ogl_brightness_g = g + gr_palette_gamma;
 588         ogl_brightness_b = b + gr_palette_gamma;
 589
 590         if (ogl_setgammaramp_ok &&
 591             (old_b_r != ogl_brightness_r ||
 592              old_b_g != ogl_brightness_g ||
 593              old_b_b != ogl_brightness_b))
 594                 ogl_brightness_ok = !ogl_setbrightness_internal();
 595
 596         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 597         {
 598                 last_r = ogl_brightness_r / 63.0;
 599                 last_g = ogl_brightness_g / 63.0;
 600                 last_b = ogl_brightness_b / 63.0;
 601
 602                 do_pal_step = (r || g || b || gr_palette_gamma);
 603         }
 604         else
 605         {
 606                 do_pal_step = 0;
 607         }
 608 }
 609
 610 //added on 980913 by adb to fix palette problems
 611 // need a min without side effects...
 612 #undef min
 613 static inline int min(int x, int y) { return x < y ? x : y; }
 614 //end changes by adb
 615
 616 void gr_palette_load( ubyte *pal )
 617 {
 618  int i;//, j;
 619
 620  for (i=0; i<768; i++ ) {
 621      gr_current_pal[i] = pal[i];
 622      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 623  }
 624  //palette = screen->format->palette;
 625
 626  gr_palette_faded_out=0;
 627
 628         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 629
 630  init_computed_colors();
 631 }
 632
 633
 634
 635 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 636 {
 637         gr_palette_faded_out=1;
 638         return 0;
 639 }
 640
 641
 642
 643 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 644 {
 645         gr_palette_faded_out=0;
 646         return 0;
 647 }
 648
 649
 650
 651 void gr_palette_read(ubyte * pal)
 652 {
 653         int i;
 654         for (i=0; i<768; i++ ) {
 655                 pal[i]=gr_current_pal[i];
 656                 if (pal[i] > 63) pal[i] = 63;
 657         }
 658 }
 659
 660 //writes out an uncompressed RGB .tga file
 661 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 662 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 663         int f;
 664 #ifdef _WIN32
 665         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
 666 #else
 667         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 668 #endif
 669         if (f>=0){
 670                 GLubyte    targaMagic[12] = { 0, //no identification field
 671                          0,//no colormap
 672                          2,//RGB image (well, BGR, actually)
 673                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 674                 GLubyte blah;
 675                 int r;
 676                 GLubyte *s;
 677                 int x,y;
 678
 679                 //write .TGA header.
 680                 write (f,targaMagic,sizeof(targaMagic));
 681                 blah=w%256;write (f,&blah,1);//w, low
 682                 blah=w/256;write (f,&blah,1);//w, high
 683                 blah=h%256;write (f,&blah,1);//h, low
 684                 blah=h/256;write (f,&blah,1);//h, high
 685                 blah=24;write (f,&blah,1);//24 bpp
 686                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 687
 688                 s=buf;
 689                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 690                         for (x=0;x<w;x++){
 691                                 blah=s[0];
 692                                 s[0]=s[2];
 693                                 s[2]=blah;
 694                                 s+=3;
 695                         }
 696                 }
 697                 x=0;y=w*h*3;
 698                 while (x<y){
 699                         r=write(f,buf+x,y);
 700                         if (r<=0){
 701                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 702                                 break;
 703                         }
 704                         x+=r;y-=r;
 705                 }
 706                 close(f);
 707         }else{
 708                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 709         }
 710 }
 711 void save_screen_shot(int automap_flag)
 712 {
 713 //      fix t1;
 714         char message[100];
 715         static int savenum=0;
 716         char savename[13];
 717         unsigned char *buf;
 718
 719         if (!ogl_readpixels_ok){
 720                 if (!automap_flag)
 721                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 722                 return;
 723         }
 724
 725         stop_time();
 726
 727 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 728         if ( savenum == 9999 ) savenum = 0;
 729         sprintf(savename,"scrn%04d.tga",savenum++);
 730
 731         while(!access(savename,0))
 732         {
 733                 if ( savenum == 9999 ) savenum = 0;
 734                 sprintf(savename,"scrn%04d.tga",savenum++);
 735         }
 736         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 737 //end this section addition/change - Victor Rachels
 738
 739         if (automap_flag) {
 740 //      save_font = grd_curcanv->cv_font;
 741 //      gr_set_curfont(GAME_FONT);
 742 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 743 //      gr_get_string_size(message,&w,&h,&aw);
 744 //              modex_print_message(32, 2, message);
 745         } else {
 746                 hud_message(MSGC_GAME_FEEDBACK,message);
 747         }
 748
 749         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 750         glReadBuffer(GL_FRONT);
 751         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 752         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 753         d_free(buf);
 754
 755         key_flush();
 756         start_time();
 757 }