arch/ogl/gr.c

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