arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.22 2004-05-20 03:31:31 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 {
 165         int t, arb_max_textures = -1, sgi_max_textures = -1;
 166         gl_vendor=glGetString(GL_VENDOR);
 167         gl_renderer=glGetString(GL_RENDERER);
 168         gl_version=glGetString(GL_VERSION);
 169         gl_extensions=glGetString(GL_EXTENSIONS);
 170
 171         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 172
 173         ogl_intensity4_ok = 1;
 174         ogl_luminance4_alpha4_ok = 1;
 175         ogl_rgba2_ok = 1;
 176         ogl_gettexlevelparam_ok = 1;
 177         ogl_setgammaramp_ok = 1;
 178
 179 #if 0 //WGL only, I think
 180         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 181         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 182         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 183         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 184 #endif
 185
 186 #ifdef GL_ARB_multitexture
 187         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 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 = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 192         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 193 #endif
 194         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 195
 196         //add driver specific hacks here.  whee.
 197         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){
 198                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 199                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 200                 ogl_gettexlevelparam_ok=0;//returns random data..
 201         }
 202         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 203                 //displays garbage. reported by
 204                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 205                 //  orulz (Matrox G200)
 206                 ogl_intensity4_ok=0;
 207         }
 208
 209         //allow overriding of stuff.
 210 #ifdef GL_ARB_multitexture
 211         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 212                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 213         }
 214         if (ogl_arb_multitexture_ok)
 215                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 216 #endif
 217 #ifdef GL_SGIS_multitexture
 218         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 219                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 220         }
 221         if (ogl_sgis_multitexture_ok)
 222                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 223 #endif
 224         if ((t=FindArg("-gl_intensity4_ok"))){
 225                 ogl_intensity4_ok=atoi(Args[t+1]);
 226         }
 227         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 228                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 229         }
 230         if ((t=FindArg("-gl_rgba2_ok"))){
 231                 ogl_rgba2_ok=atoi(Args[t+1]);
 232         }
 233         if ((t=FindArg("-gl_readpixels_ok"))){
 234                 ogl_readpixels_ok=atoi(Args[t+1]);
 235         }
 236         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 237                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 238         }
 239         if ((t=FindArg("-gl_setgammaramp_ok")))
 240         {
 241                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 242         }
 243
 244         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i(%i units) gl_sgis_multitexture:%i(%i units) gl_nv_texture_env_combine4:%i\n", ogl_arb_multitexture_ok, arb_max_textures, ogl_sgis_multitexture_ok, sgi_max_textures, ogl_nv_texture_env_combine4_ok);
 245         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);
 246 }
 247
 248
 249 int gr_check_mode(u_int32_t mode)
 250 {
 251         int w, h;
 252
 253         w = SM_W(mode);
 254         h = SM_H(mode);
 255         return ogl_check_mode(w, h); // platform specific code
 256 }
 257
 258
 259 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 260
 261 int gr_set_mode(u_int32_t mode)
 262 {
 263         unsigned int w,h;
 264         char *gr_bm_data;
 265
 266 #ifdef NOGRAPH
 267 return 0;
 268 #endif
 269 //      mode=0;
 270         if (mode<=0)
 271                 return 0;
 272
 273         w=SM_W(mode);
 274         h=SM_H(mode);
 275         VGA_current_mode = mode;
 276
 277         //if (screen != NULL) gr_palette_clear();
 278
 279 //      ogl_init_state();
 280
 281         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 282         memset( grd_curscreen, 0, sizeof(grs_screen));
 283         grd_curscreen->sc_mode = mode;
 284         grd_curscreen->sc_w = w;
 285         grd_curscreen->sc_h = h;
 286         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 287         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 288         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 289         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 290         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 291         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 292         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 293         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 294         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 295 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 296         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 297         gr_set_current_canvas(NULL);
 298         //gr_enable_default_palette_loading();
 299
 300         ogl_init_window(w,h);//platform specific code
 301
 302         ogl_get_verinfo();
 303
 304         OGL_VIEWPORT(0,0,w,h);
 305
 306         ogl_set_screen_mode();
 307
 308 //      gamefont_choose_game_font(w,h);
 309
 310         return 0;
 311 }
 312
 313 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 314 int ogl_atotexfilti(char *a,int min){
 315         GLstrcmptestr(a,NEAREST);
 316         GLstrcmptestr(a,LINEAR);
 317         if (min){//mipmaps are valid only for the min filter
 318                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 319                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 320                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 321                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 322         }
 323         Error("unknown/invalid texture filter %s\n",a);
 324 //      return GL_NEAREST;
 325 }
 326 int ogl_testneedmipmaps(int i){
 327         switch (i){
 328                 case GL_NEAREST:
 329                 case GL_LINEAR:
 330                         return 0;
 331                 case GL_NEAREST_MIPMAP_NEAREST:
 332                 case GL_NEAREST_MIPMAP_LINEAR:
 333                 case GL_LINEAR_MIPMAP_NEAREST:
 334                 case GL_LINEAR_MIPMAP_LINEAR:
 335                         return 1;
 336         }
 337         Error("unknown texture filter %x\n",i);
 338 //      return -1;
 339 }
 340 #ifdef OGL_RUNTIME_LOAD
 341 #ifdef _WIN32
 342 char *OglLibPath="opengl32.dll";
 343 #endif
 344 #ifdef __unix__
 345 char *OglLibPath="libGL.so";
 346 #endif
 347
 348 int ogl_rt_loaded=0;
 349 int ogl_init_load_library(void)
 350 {
 351         int retcode=0;
 352         if (!ogl_rt_loaded){
 353                 int t;
 354                 if ((t=FindArg("-gl_library")))
 355                         OglLibPath=Args[t+1];
 356
 357                 retcode = OpenGL_LoadLibrary(true);
 358                 if(retcode)
 359                 {
 360                         mprintf((0,"Opengl loaded ok\n"));
 361
 362                         if(!glEnd)
 363                         {
 364                                 Error("Opengl: Functions not imported\n");
 365                         }
 366                 }else{
 367                         Error("Opengl: error loading %s\n",OglLibPath);
 368                 }
 369                 ogl_rt_loaded=1;
 370         }
 371         return retcode;
 372 }
 373 #endif
 374
 375 int gr_init()
 376 {
 377         int mode = SM(640,480);
 378         int retcode, t, glt = 0;
 379
 380         // Only do this function once!
 381         if (gr_installed==1)
 382                 return -1;
 383
 384
 385 #ifdef OGL_RUNTIME_LOAD
 386         ogl_init_load_library();
 387 #endif
 388
 389 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 390         if (FindArg("-gl_voodoo")){
 391                 ogl_voodoohack=1;
 392                 gr_toggle_fullscreen();
 393         }
 394         if (FindArg("-fullscreen"))
 395                 gr_toggle_fullscreen();
 396 #endif
 397         if ((glt=FindArg("-gl_alttexmerge")))
 398                 ogl_alttexmerge=1;
 399         if ((t=FindArg("-gl_stdtexmerge")))
 400                 if (t>=glt)//allow overriding of earlier args
 401                         ogl_alttexmerge=0;
 402
 403         if ((glt=FindArg("-gl_16bittextures")))
 404                 ogl_rgba_format=GL_RGB5_A1;
 405
 406         if ((glt=FindArg("-gl_mipmap"))){
 407                 GL_texmagfilt=GL_LINEAR;
 408                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 409         }
 410         if ((glt=FindArg("-gl_trilinear")))
 411         {
 412                 GL_texmagfilt = GL_LINEAR;
 413                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 414         }
 415         if ((t=FindArg("-gl_simple"))){
 416                 if (t>=glt){//allow overriding of earlier args
 417                         glt=t;
 418                         GL_texmagfilt=GL_NEAREST;
 419                         GL_texminfilt=GL_NEAREST;
 420                 }
 421         }
 422         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 423                 if (t>=glt)//allow overriding of earlier args
 424                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 425         }
 426         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 427                 if (t>=glt)//allow overriding of earlier args
 428                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 429         }
 430         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 431         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps));
 432
 433         if ((t=FindArg("-gl_vidmem"))){
 434                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 435         }
 436         if ((t=FindArg("-gl_reticle"))){
 437                 gl_reticle=atoi(Args[t+1]);
 438         }
 439         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 440
 441         ogl_init();//platform specific initialization
 442
 443         ogl_init_texture_list_internal();
 444
 445         MALLOC( grd_curscreen,grs_screen,1 );
 446         memset( grd_curscreen, 0, sizeof(grs_screen));
 447         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 448
 449         // Set the mode.
 450         if ((retcode=gr_set_mode(mode)))
 451         {
 452                 return retcode;
 453         }
 454
 455         grd_curscreen->sc_canvas.cv_color = 0;
 456         grd_curscreen->sc_canvas.cv_drawmode = 0;
 457         grd_curscreen->sc_canvas.cv_font = NULL;
 458         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 459         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 460         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 461
 462         gr_installed = 1;
 463
 464         atexit(gr_close);
 465
 466         return 0;
 467 }
 468
 469 void gr_close()
 470 {
 471 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 472
 473         ogl_close();//platform specific code
 474         if (grd_curscreen){
 475                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 476                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 477                 d_free(grd_curscreen);
 478         }
 479 #ifdef OGL_RUNTIME_LOAD
 480         if (ogl_rt_loaded)
 481                 OpenGL_LoadLibrary(false);
 482 #endif
 483 }
 484 extern int r_upixelc;
 485 void ogl_upixelc(int x, int y, int c){
 486         r_upixelc++;
 487 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 488 //      if(Function_mode != FMODE_GAME){
 489 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 490 //      }else{
 491                 OGL_DISABLE(TEXTURE_2D);
 492                 glPointSize(1.0);
 493                 glBegin(GL_POINTS);
 494 //              glBegin(GL_LINES);
 495 //      ogl_pal=gr_current_pal;
 496                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 497 //      ogl_pal=gr_palette;
 498                 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);
 499 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 500                 glEnd();
 501 //      }
 502 }
 503 void ogl_urect(int left,int top,int right,int bot){
 504         GLfloat xo,yo,xf,yf;
 505         int c=COLOR;
 506
 507         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 508         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 509         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 510         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 511
 512         OGL_DISABLE(TEXTURE_2D);
 513         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 514         glBegin(GL_QUADS);
 515         glVertex2f(xo,yo);
 516         glVertex2f(xo,yf);
 517         glVertex2f(xf,yf);
 518         glVertex2f(xf,yo);
 519         glEnd();
 520 }
 521 void ogl_ulinec(int left,int top,int right,int bot,int c){
 522         GLfloat xo,yo,xf,yf;
 523
 524         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 525         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 526         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 527         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 528
 529         OGL_DISABLE(TEXTURE_2D);
 530         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 531         glBegin(GL_LINES);
 532         glVertex2f(xo,yo);
 533         glVertex2f(xf,yf);
 534         glEnd();
 535 }
 536
 537
 538 GLfloat last_r=0, last_g=0, last_b=0;
 539 int do_pal_step=0;
 540 void ogl_do_palfx(void){
 541 //      GLfloat r,g,b,a;
 542         OGL_DISABLE(TEXTURE_2D);
 543         if (gr_palette_faded_out){
 544 /*              glEnable(GL_BLEND);
 545                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 546                 glColor3f(0,0,0);
 547 //              r=g=b=0.0;a=1.0;
 548         }else{
 549                 if (do_pal_step){
 550                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 551                         glEnable(GL_BLEND);
 552                         glBlendFunc(GL_ONE,GL_ONE);
 553                         glColor3f(last_r,last_g,last_b);
 554 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 555                 }else
 556                         return;
 557         }
 558
 559
 560         glBegin(GL_QUADS);
 561         glVertex2f(0,0);
 562         glVertex2f(0,1);
 563         glVertex2f(1,1);
 564         glVertex2f(1,0);
 565         glEnd();
 566
 567         glEnable(GL_BLEND);
 568         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 569 }
 570
 571 void gr_palette_clear()
 572 {
 573         gr_palette_faded_out=1;
 574 }
 575
 576
 577 int ogl_brightness_ok = 0;
 578 int ogl_setgammaramp_ok = 1;
 579 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 580 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 581
 582 void gr_palette_step_up(int r, int g, int b)
 583 {
 584         if (gr_palette_faded_out)
 585                 return;
 586
 587         old_b_r = ogl_brightness_r;
 588         old_b_g = ogl_brightness_g;
 589         old_b_b = ogl_brightness_b;
 590
 591         ogl_brightness_r = r + gr_palette_gamma;
 592         ogl_brightness_g = g + gr_palette_gamma;
 593         ogl_brightness_b = b + gr_palette_gamma;
 594
 595         if (ogl_setgammaramp_ok &&
 596             (old_b_r != ogl_brightness_r ||
 597              old_b_g != ogl_brightness_g ||
 598              old_b_b != ogl_brightness_b))
 599                 ogl_brightness_ok = !ogl_setbrightness_internal();
 600
 601         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 602         {
 603                 last_r = ogl_brightness_r / 63.0;
 604                 last_g = ogl_brightness_g / 63.0;
 605                 last_b = ogl_brightness_b / 63.0;
 606
 607                 do_pal_step = (r || g || b || gr_palette_gamma);
 608         }
 609         else
 610         {
 611                 do_pal_step = 0;
 612         }
 613 }
 614
 615 //added on 980913 by adb to fix palette problems
 616 // need a min without side effects...
 617 #undef min
 618 static inline int min(int x, int y) { return x < y ? x : y; }
 619 //end changes by adb
 620
 621 void gr_palette_load( ubyte *pal )
 622 {
 623  int i;//, j;
 624
 625  for (i=0; i<768; i++ ) {
 626      gr_current_pal[i] = pal[i];
 627      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 628  }
 629  //palette = screen->format->palette;
 630
 631  gr_palette_faded_out=0;
 632
 633         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 634
 635  init_computed_colors();
 636 }
 637
 638
 639
 640 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 641 {
 642         gr_palette_faded_out=1;
 643         return 0;
 644 }
 645
 646
 647
 648 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 649 {
 650         gr_palette_faded_out=0;
 651         return 0;
 652 }
 653
 654
 655
 656 void gr_palette_read(ubyte * pal)
 657 {
 658         int i;
 659         for (i=0; i<768; i++ ) {
 660                 pal[i]=gr_current_pal[i];
 661                 if (pal[i] > 63) pal[i] = 63;
 662         }
 663 }
 664
 665 //writes out an uncompressed RGB .tga file
 666 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 667 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 668         int f;
 669 #ifdef _WIN32
 670         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
 671 #else
 672         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 673 #endif
 674         if (f>=0){
 675                 GLubyte    targaMagic[12] = { 0, //no identification field
 676                          0,//no colormap
 677                          2,//RGB image (well, BGR, actually)
 678                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 679                 GLubyte blah;
 680                 int r;
 681                 GLubyte *s;
 682                 int x,y;
 683
 684                 //write .TGA header.
 685                 write (f,targaMagic,sizeof(targaMagic));
 686                 blah=w%256;write (f,&blah,1);//w, low
 687                 blah=w/256;write (f,&blah,1);//w, high
 688                 blah=h%256;write (f,&blah,1);//h, low
 689                 blah=h/256;write (f,&blah,1);//h, high
 690                 blah=24;write (f,&blah,1);//24 bpp
 691                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 692
 693                 s=buf;
 694                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 695                         for (x=0;x<w;x++){
 696                                 blah=s[0];
 697                                 s[0]=s[2];
 698                                 s[2]=blah;
 699                                 s+=3;
 700                         }
 701                 }
 702                 x=0;y=w*h*3;
 703                 while (x<y){
 704                         r=write(f,buf+x,y);
 705                         if (r<=0){
 706                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 707                                 break;
 708                         }
 709                         x+=r;y-=r;
 710                 }
 711                 close(f);
 712         }else{
 713                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 714         }
 715 }
 716 void save_screen_shot(int automap_flag)
 717 {
 718 //      fix t1;
 719         char message[100];
 720         static int savenum=0;
 721         char savename[13];
 722         unsigned char *buf;
 723
 724         if (!ogl_readpixels_ok){
 725                 if (!automap_flag)
 726                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 727                 return;
 728         }
 729
 730         stop_time();
 731
 732 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 733         if ( savenum == 9999 ) savenum = 0;
 734         sprintf(savename,"scrn%04d.tga",savenum++);
 735
 736         while(!access(savename,0))
 737         {
 738                 if ( savenum == 9999 ) savenum = 0;
 739                 sprintf(savename,"scrn%04d.tga",savenum++);
 740         }
 741         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 742 //end this section addition/change - Victor Rachels
 743
 744         if (automap_flag) {
 745 //      save_font = grd_curcanv->cv_font;
 746 //      gr_set_curfont(GAME_FONT);
 747 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 748 //      gr_get_string_size(message,&w,&h,&aw);
 749 //              modex_print_message(32, 2, message);
 750         } else {
 751                 hud_message(MSGC_GAME_FEEDBACK,message);
 752         }
 753
 754         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 755         glReadBuffer(GL_FRONT);
 756         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 757         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 758         d_free(buf);
 759
 760         key_flush();
 761         start_time();
 762 }