arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.23 2004-05-20 05:15:55 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         float anisotropic_max = 0;
 167
 168         gl_vendor=glGetString(GL_VENDOR);
 169         gl_renderer=glGetString(GL_RENDERER);
 170         gl_version=glGetString(GL_VERSION);
 171         gl_extensions=glGetString(GL_EXTENSIONS);
 172
 173         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 174
 175         ogl_intensity4_ok = 1;
 176         ogl_luminance4_alpha4_ok = 1;
 177         ogl_rgba2_ok = 1;
 178         ogl_gettexlevelparam_ok = 1;
 179         ogl_setgammaramp_ok = 1;
 180
 181 #if 0 //WGL only, I think
 182         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 183         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 184         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 185         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 186 #endif
 187
 188 #ifdef GL_ARB_multitexture
 189         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 190         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 191 #endif
 192 #ifdef GL_SGIS_multitexture
 193         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 194         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 195 #endif
 196         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 197
 198         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 199         if (ogl_ext_texture_filter_anisotropic_ok)
 200                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 201
 202         //add driver specific hacks here.  whee.
 203         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){
 204                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 205                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 206                 ogl_gettexlevelparam_ok=0;//returns random data..
 207         }
 208         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 209                 //displays garbage. reported by
 210                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 211                 //  orulz (Matrox G200)
 212                 ogl_intensity4_ok=0;
 213         }
 214
 215         //allow overriding of stuff.
 216 #ifdef GL_ARB_multitexture
 217         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 218                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 219         }
 220         if (ogl_arb_multitexture_ok)
 221                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 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         if (ogl_sgis_multitexture_ok)
 228                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 229 #endif
 230         if ((t=FindArg("-gl_intensity4_ok"))){
 231                 ogl_intensity4_ok=atoi(Args[t+1]);
 232         }
 233         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 234                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 235         }
 236         if ((t=FindArg("-gl_rgba2_ok"))){
 237                 ogl_rgba2_ok=atoi(Args[t+1]);
 238         }
 239         if ((t=FindArg("-gl_readpixels_ok"))){
 240                 ogl_readpixels_ok=atoi(Args[t+1]);
 241         }
 242         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 243                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 244         }
 245         if ((t=FindArg("-gl_setgammaramp_ok")))
 246         {
 247                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 248         }
 249
 250         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);
 251         con_printf(CON_VERBOSE, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i gl_setgammaramp_ok:%i gl_ext_texture_filter_anisotropic:%i(%f max)\n", ogl_intensity4_ok, ogl_luminance4_alpha4_ok, ogl_rgba2_ok, ogl_readpixels_ok, ogl_gettexlevelparam_ok, ogl_setgammaramp_ok, ogl_ext_texture_filter_anisotropic_ok, anisotropic_max);
 252 }
 253
 254
 255 int gr_check_mode(u_int32_t mode)
 256 {
 257         int w, h;
 258
 259         w = SM_W(mode);
 260         h = SM_H(mode);
 261         return ogl_check_mode(w, h); // platform specific code
 262 }
 263
 264
 265 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 266
 267 int gr_set_mode(u_int32_t mode)
 268 {
 269         unsigned int w,h;
 270         char *gr_bm_data;
 271
 272 #ifdef NOGRAPH
 273 return 0;
 274 #endif
 275 //      mode=0;
 276         if (mode<=0)
 277                 return 0;
 278
 279         w=SM_W(mode);
 280         h=SM_H(mode);
 281         VGA_current_mode = mode;
 282
 283         //if (screen != NULL) gr_palette_clear();
 284
 285 //      ogl_init_state();
 286
 287         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 288         memset( grd_curscreen, 0, sizeof(grs_screen));
 289         grd_curscreen->sc_mode = mode;
 290         grd_curscreen->sc_w = w;
 291         grd_curscreen->sc_h = h;
 292         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 293         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 294         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 295         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 296         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 297         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 298         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 299         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 300         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 301 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 302         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 303         gr_set_current_canvas(NULL);
 304         //gr_enable_default_palette_loading();
 305
 306         ogl_init_window(w,h);//platform specific code
 307
 308         ogl_get_verinfo();
 309
 310         OGL_VIEWPORT(0,0,w,h);
 311
 312         ogl_set_screen_mode();
 313
 314 //      gamefont_choose_game_font(w,h);
 315
 316         return 0;
 317 }
 318
 319 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 320 int ogl_atotexfilti(char *a,int min){
 321         GLstrcmptestr(a,NEAREST);
 322         GLstrcmptestr(a,LINEAR);
 323         if (min){//mipmaps are valid only for the min filter
 324                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 325                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 326                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 327                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 328         }
 329         Error("unknown/invalid texture filter %s\n",a);
 330 //      return GL_NEAREST;
 331 }
 332 int ogl_testneedmipmaps(int i){
 333         switch (i){
 334                 case GL_NEAREST:
 335                 case GL_LINEAR:
 336                         return 0;
 337                 case GL_NEAREST_MIPMAP_NEAREST:
 338                 case GL_NEAREST_MIPMAP_LINEAR:
 339                 case GL_LINEAR_MIPMAP_NEAREST:
 340                 case GL_LINEAR_MIPMAP_LINEAR:
 341                         return 1;
 342         }
 343         Error("unknown texture filter %x\n",i);
 344 //      return -1;
 345 }
 346 #ifdef OGL_RUNTIME_LOAD
 347 #ifdef _WIN32
 348 char *OglLibPath="opengl32.dll";
 349 #endif
 350 #ifdef __unix__
 351 char *OglLibPath="libGL.so";
 352 #endif
 353
 354 int ogl_rt_loaded=0;
 355 int ogl_init_load_library(void)
 356 {
 357         int retcode=0;
 358         if (!ogl_rt_loaded){
 359                 int t;
 360                 if ((t=FindArg("-gl_library")))
 361                         OglLibPath=Args[t+1];
 362
 363                 retcode = OpenGL_LoadLibrary(true);
 364                 if(retcode)
 365                 {
 366                         mprintf((0,"Opengl loaded ok\n"));
 367
 368                         if(!glEnd)
 369                         {
 370                                 Error("Opengl: Functions not imported\n");
 371                         }
 372                 }else{
 373                         Error("Opengl: error loading %s\n",OglLibPath);
 374                 }
 375                 ogl_rt_loaded=1;
 376         }
 377         return retcode;
 378 }
 379 #endif
 380
 381 int gr_init()
 382 {
 383         int mode = SM(640,480);
 384         int retcode, t, glt = 0;
 385
 386         // Only do this function once!
 387         if (gr_installed==1)
 388                 return -1;
 389
 390
 391 #ifdef OGL_RUNTIME_LOAD
 392         ogl_init_load_library();
 393 #endif
 394
 395 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 396         if (FindArg("-gl_voodoo")){
 397                 ogl_voodoohack=1;
 398                 gr_toggle_fullscreen();
 399         }
 400         if (FindArg("-fullscreen"))
 401                 gr_toggle_fullscreen();
 402 #endif
 403         if ((glt=FindArg("-gl_alttexmerge")))
 404                 ogl_alttexmerge=1;
 405         if ((t=FindArg("-gl_stdtexmerge")))
 406                 if (t>=glt)//allow overriding of earlier args
 407                         ogl_alttexmerge=0;
 408
 409         if ((glt=FindArg("-gl_16bittextures")))
 410                 ogl_rgba_format=GL_RGB5_A1;
 411
 412         if ((glt=FindArg("-gl_mipmap"))){
 413                 GL_texmagfilt=GL_LINEAR;
 414                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 415         }
 416         if ((glt=FindArg("-gl_trilinear")))
 417         {
 418                 GL_texmagfilt = GL_LINEAR;
 419                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 420         }
 421         if ((t=FindArg("-gl_simple"))){
 422                 if (t>=glt){//allow overriding of earlier args
 423                         glt=t;
 424                         GL_texmagfilt=GL_NEAREST;
 425                         GL_texminfilt=GL_NEAREST;
 426                 }
 427         }
 428         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 429                 if (t>=glt)//allow overriding of earlier args
 430                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 431         }
 432         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 433                 if (t>=glt)//allow overriding of earlier args
 434                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 435         }
 436         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 437
 438         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 439         {
 440                 GL_texanisofilt=atof(Args[t + 1]);
 441         }
 442
 443         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 444
 445
 446         if ((t=FindArg("-gl_vidmem"))){
 447                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 448         }
 449         if ((t=FindArg("-gl_reticle"))){
 450                 gl_reticle=atoi(Args[t+1]);
 451         }
 452         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 453
 454         ogl_init();//platform specific initialization
 455
 456         ogl_init_texture_list_internal();
 457
 458         MALLOC( grd_curscreen,grs_screen,1 );
 459         memset( grd_curscreen, 0, sizeof(grs_screen));
 460         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 461
 462         // Set the mode.
 463         if ((retcode=gr_set_mode(mode)))
 464         {
 465                 return retcode;
 466         }
 467
 468         grd_curscreen->sc_canvas.cv_color = 0;
 469         grd_curscreen->sc_canvas.cv_drawmode = 0;
 470         grd_curscreen->sc_canvas.cv_font = NULL;
 471         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 472         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 473         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 474
 475         gr_installed = 1;
 476
 477         atexit(gr_close);
 478
 479         return 0;
 480 }
 481
 482 void gr_close()
 483 {
 484 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 485
 486         ogl_close();//platform specific code
 487         if (grd_curscreen){
 488                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 489                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 490                 d_free(grd_curscreen);
 491         }
 492 #ifdef OGL_RUNTIME_LOAD
 493         if (ogl_rt_loaded)
 494                 OpenGL_LoadLibrary(false);
 495 #endif
 496 }
 497 extern int r_upixelc;
 498 void ogl_upixelc(int x, int y, int c){
 499         r_upixelc++;
 500 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 501 //      if(Function_mode != FMODE_GAME){
 502 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 503 //      }else{
 504                 OGL_DISABLE(TEXTURE_2D);
 505                 glPointSize(1.0);
 506                 glBegin(GL_POINTS);
 507 //              glBegin(GL_LINES);
 508 //      ogl_pal=gr_current_pal;
 509                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 510 //      ogl_pal=gr_palette;
 511                 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);
 512 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 513                 glEnd();
 514 //      }
 515 }
 516 void ogl_urect(int left,int top,int right,int bot){
 517         GLfloat xo,yo,xf,yf;
 518         int c=COLOR;
 519
 520         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 521         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 522         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 523         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 524
 525         OGL_DISABLE(TEXTURE_2D);
 526         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 527         glBegin(GL_QUADS);
 528         glVertex2f(xo,yo);
 529         glVertex2f(xo,yf);
 530         glVertex2f(xf,yf);
 531         glVertex2f(xf,yo);
 532         glEnd();
 533 }
 534 void ogl_ulinec(int left,int top,int right,int bot,int c){
 535         GLfloat xo,yo,xf,yf;
 536
 537         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 538         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 539         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 540         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 541
 542         OGL_DISABLE(TEXTURE_2D);
 543         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 544         glBegin(GL_LINES);
 545         glVertex2f(xo,yo);
 546         glVertex2f(xf,yf);
 547         glEnd();
 548 }
 549
 550
 551 GLfloat last_r=0, last_g=0, last_b=0;
 552 int do_pal_step=0;
 553 void ogl_do_palfx(void){
 554 //      GLfloat r,g,b,a;
 555         OGL_DISABLE(TEXTURE_2D);
 556         if (gr_palette_faded_out){
 557 /*              glEnable(GL_BLEND);
 558                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 559                 glColor3f(0,0,0);
 560 //              r=g=b=0.0;a=1.0;
 561         }else{
 562                 if (do_pal_step){
 563                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 564                         glEnable(GL_BLEND);
 565                         glBlendFunc(GL_ONE,GL_ONE);
 566                         glColor3f(last_r,last_g,last_b);
 567 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 568                 }else
 569                         return;
 570         }
 571
 572
 573         glBegin(GL_QUADS);
 574         glVertex2f(0,0);
 575         glVertex2f(0,1);
 576         glVertex2f(1,1);
 577         glVertex2f(1,0);
 578         glEnd();
 579
 580         glEnable(GL_BLEND);
 581         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 582 }
 583
 584 void gr_palette_clear()
 585 {
 586         gr_palette_faded_out=1;
 587 }
 588
 589
 590 int ogl_brightness_ok = 0;
 591 int ogl_setgammaramp_ok = 1;
 592 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 593 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 594
 595 void gr_palette_step_up(int r, int g, int b)
 596 {
 597         if (gr_palette_faded_out)
 598                 return;
 599
 600         old_b_r = ogl_brightness_r;
 601         old_b_g = ogl_brightness_g;
 602         old_b_b = ogl_brightness_b;
 603
 604         ogl_brightness_r = r + gr_palette_gamma;
 605         ogl_brightness_g = g + gr_palette_gamma;
 606         ogl_brightness_b = b + gr_palette_gamma;
 607
 608         if (ogl_setgammaramp_ok &&
 609             (old_b_r != ogl_brightness_r ||
 610              old_b_g != ogl_brightness_g ||
 611              old_b_b != ogl_brightness_b))
 612                 ogl_brightness_ok = !ogl_setbrightness_internal();
 613
 614         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 615         {
 616                 last_r = ogl_brightness_r / 63.0;
 617                 last_g = ogl_brightness_g / 63.0;
 618                 last_b = ogl_brightness_b / 63.0;
 619
 620                 do_pal_step = (r || g || b || gr_palette_gamma);
 621         }
 622         else
 623         {
 624                 do_pal_step = 0;
 625         }
 626 }
 627
 628 //added on 980913 by adb to fix palette problems
 629 // need a min without side effects...
 630 #undef min
 631 static inline int min(int x, int y) { return x < y ? x : y; }
 632 //end changes by adb
 633
 634 void gr_palette_load( ubyte *pal )
 635 {
 636  int i;//, j;
 637
 638  for (i=0; i<768; i++ ) {
 639      gr_current_pal[i] = pal[i];
 640      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 641  }
 642  //palette = screen->format->palette;
 643
 644  gr_palette_faded_out=0;
 645
 646         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 647
 648  init_computed_colors();
 649 }
 650
 651
 652
 653 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 654 {
 655         gr_palette_faded_out=1;
 656         return 0;
 657 }
 658
 659
 660
 661 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 662 {
 663         gr_palette_faded_out=0;
 664         return 0;
 665 }
 666
 667
 668
 669 void gr_palette_read(ubyte * pal)
 670 {
 671         int i;
 672         for (i=0; i<768; i++ ) {
 673                 pal[i]=gr_current_pal[i];
 674                 if (pal[i] > 63) pal[i] = 63;
 675         }
 676 }
 677
 678 //writes out an uncompressed RGB .tga file
 679 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 680 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 681         int f;
 682 #ifdef _WIN32
 683         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
 684 #else
 685         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 686 #endif
 687         if (f>=0){
 688                 GLubyte    targaMagic[12] = { 0, //no identification field
 689                          0,//no colormap
 690                          2,//RGB image (well, BGR, actually)
 691                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 692                 GLubyte blah;
 693                 int r;
 694                 GLubyte *s;
 695                 int x,y;
 696
 697                 //write .TGA header.
 698                 write (f,targaMagic,sizeof(targaMagic));
 699                 blah=w%256;write (f,&blah,1);//w, low
 700                 blah=w/256;write (f,&blah,1);//w, high
 701                 blah=h%256;write (f,&blah,1);//h, low
 702                 blah=h/256;write (f,&blah,1);//h, high
 703                 blah=24;write (f,&blah,1);//24 bpp
 704                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 705
 706                 s=buf;
 707                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 708                         for (x=0;x<w;x++){
 709                                 blah=s[0];
 710                                 s[0]=s[2];
 711                                 s[2]=blah;
 712                                 s+=3;
 713                         }
 714                 }
 715                 x=0;y=w*h*3;
 716                 while (x<y){
 717                         r=write(f,buf+x,y);
 718                         if (r<=0){
 719                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 720                                 break;
 721                         }
 722                         x+=r;y-=r;
 723                 }
 724                 close(f);
 725         }else{
 726                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 727         }
 728 }
 729 void save_screen_shot(int automap_flag)
 730 {
 731 //      fix t1;
 732         char message[100];
 733         static int savenum=0;
 734         char savename[13];
 735         unsigned char *buf;
 736
 737         if (!ogl_readpixels_ok){
 738                 if (!automap_flag)
 739                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 740                 return;
 741         }
 742
 743         stop_time();
 744
 745 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 746         if ( savenum == 9999 ) savenum = 0;
 747         sprintf(savename,"scrn%04d.tga",savenum++);
 748
 749         while(!access(savename,0))
 750         {
 751                 if ( savenum == 9999 ) savenum = 0;
 752                 sprintf(savename,"scrn%04d.tga",savenum++);
 753         }
 754         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 755 //end this section addition/change - Victor Rachels
 756
 757         if (automap_flag) {
 758 //      save_font = grd_curcanv->cv_font;
 759 //      gr_set_curfont(GAME_FONT);
 760 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 761 //      gr_get_string_size(message,&w,&h,&aw);
 762 //              modex_print_message(32, 2, message);
 763         } else {
 764                 hud_message(MSGC_GAME_FEEDBACK,message);
 765         }
 766
 767         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 768         glReadBuffer(GL_FRONT);
 769         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 770         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 771         d_free(buf);
 772
 773         key_flush();
 774         start_time();
 775 }