arch/ogl/gr.c

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