arch/ogl/vid.c

   1 /*
   2  *
   3  * OGL video functions. - Added 9/15/99 Matthew Mueller
   4  *
   5  *
   6  */
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include <conf.h>
  10 #endif
  11
  12 #include <stdlib.h>
  13 #include <stdio.h>
  14 #include <string.h>
  15 #ifdef _MSC_VER
  16 #include <windows.h>
  17 #endif
  18
  19 #if !defined(_MSC_VER) && !defined(macintosh)
  20 #include <unistd.h>
  21 #endif
  22 #if !defined(macintosh)
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <fcntl.h>
  26 #endif
  27
  28 #include <errno.h>
  29
  30 #include "inferno.h"
  31 #include "gr.h"
  32 #include "vid.h"
  33 #include "u_mem.h"
  34 #include "error.h"
  35 #include "timer.h"
  36 #include "strutil.h"
  37 #include "mono.h"
  38 #include "args.h"
  39 #include "key.h"
  40 #include "physfsx.h"
  41
  42 #define DECLARE_VARS
  43 #include "internal.h"
  44 #if defined(__APPLE__) && defined(__MACH__)
  45 #include <OpenGL/glu.h>
  46 #undef GL_ARB_multitexture // hack!
  47 #else
  48 #include <GL/glu.h>
  49 #endif
  50
  51
  52 int ogl_voodoohack=0;
  53
  54 int vid_installed = 0;
  55
  56
  57 void gr_palette_clear(); // Function prototype for gr_init;
  58 int gl_initialized=0;
  59 int gl_reticle = 0;
  60
  61 int ogl_fullscreen=0;
  62
  63
  64 int vid_check_fullscreen(void)
  65 {
  66         return ogl_fullscreen;
  67 }
  68
  69
  70 static void do_fullscreen(int f)
  71 {
  72         if (ogl_voodoohack)
  73                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  74         else
  75                 ogl_fullscreen=f;
  76         if (gl_initialized){
  77                 ogl_do_fullscreen_internal();
  78         }
  79 }
  80
  81
  82 int vid_toggle_fullscreen(void)
  83 {
  84         do_fullscreen(!ogl_fullscreen);
  85         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  86         return ogl_fullscreen;
  87 }
  88
  89
  90 int vid_toggle_fullscreen_menu(void)
  91 {
  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         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 vid_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         long t, sgi_max_textures = -1;
 166         GLint arb_max_textures = -1;
 167 #ifdef GL_NV_register_combiners
 168         long nv_register_combiners = -1;
 169 #endif
 170         float anisotropic_max = 0;
 171
 172         gl_vendor = (const char *) glGetString (GL_VENDOR);
 173         gl_renderer = (const char *) glGetString (GL_RENDERER);
 174         gl_version = (const char *) glGetString (GL_VERSION);
 175         gl_extensions = (const char *) glGetString (GL_EXTENSIONS);
 176
 177         con_printf(CON_VERBOSE, "OpenGL: vendor: %s\nOpenGL: renderer: %s\nOpenGL: version: %s\n",gl_vendor,gl_renderer,gl_version);
 178
 179         ogl_intensity4_ok = 1;
 180         ogl_luminance4_alpha4_ok = 1;
 181         ogl_rgba2_ok = 1;
 182         ogl_gettexlevelparam_ok = 1;
 183         ogl_setgammaramp_ok = 1;
 184
 185 #ifdef WGL_VIDEO
 186         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 187         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 188         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 189         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 190         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 191         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 192         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 193         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 194         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 195 #endif
 196
 197 #ifdef GL_ARB_multitexture
 198         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 199         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 200 #endif
 201 #ifdef GL_SGIS_multitexture
 202         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 203         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 204 #endif
 205         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 206 #ifdef GL_NV_register_combiners
 207         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 208 #endif
 209
 210         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 211         if (ogl_ext_texture_filter_anisotropic_ok)
 212                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 213
 214 #ifdef GL_EXT_paletted_texture
 215         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 216         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 217 #endif
 218         //add driver specific hacks here.  whee.
 219         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){
 220                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 221                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 222                 ogl_gettexlevelparam_ok=0;//returns random data..
 223         }
 224         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 225                 //displays garbage. reported by
 226                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 227                 //  orulz (Matrox G200)
 228                 ogl_intensity4_ok=0;
 229         }
 230 #ifdef macintosh
 231         if (stricmp(gl_renderer,"3dfx Voodoo 3")==0){ // strangely, includes Voodoo 2
 232                 ogl_gettexlevelparam_ok=0; // Always returns 0
 233         }
 234 #endif
 235
 236         //allow overriding of stuff.
 237 #ifdef GL_ARB_multitexture
 238         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 239                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 240         }
 241         if (ogl_arb_multitexture_ok)
 242                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 243 #endif
 244 #ifdef GL_SGIS_multitexture
 245         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 246                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 247         }
 248         if (ogl_sgis_multitexture_ok)
 249                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 250 #endif
 251 #ifdef GL_NV_register_combiners
 252         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 253         {
 254                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 255         }
 256         if (ogl_nv_register_combiners_ok)
 257                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 258 #endif
 259 #ifdef GL_EXT_paletted_texture
 260         if ((t = FindArg("-gl_paletted_texture_ok")))
 261         {
 262                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 263         }
 264         if ((t = FindArg("-gl_shared_palette_ok")))
 265         {
 266                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 267         }
 268         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 269         printf("gl_paletted_texture: %i  gl_shared_palette: %i  (using paletted textures: %i)\n", ogl_paletted_texture_ok, ogl_shared_palette_ok, ogl_shared_palette_ok);
 270 #endif
 271         if ((t=FindArg("-gl_intensity4_ok"))){
 272                 ogl_intensity4_ok=atoi(Args[t+1]);
 273         }
 274         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 275                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 276         }
 277         if ((t=FindArg("-gl_rgba2_ok"))){
 278                 ogl_rgba2_ok=atoi(Args[t+1]);
 279         }
 280         if ((t=FindArg("-gl_readpixels_ok"))){
 281                 ogl_readpixels_ok=atoi(Args[t+1]);
 282         }
 283         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 284                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 285         }
 286         if ((t=FindArg("-gl_setgammaramp_ok")))
 287         {
 288                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 289         }
 290
 291         con_printf(CON_DEBUG, "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);
 292 #ifdef GL_NV_register_combiners
 293         con_printf(CON_DEBUG, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 294 #endif
 295         con_printf(CON_DEBUG, "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);
 296 }
 297
 298
 299 int vid_check_mode(uint32_t mode)
 300 {
 301         int w, h;
 302
 303         w = SM_W(mode);
 304         h = SM_H(mode);
 305         return ogl_check_mode(w, h); // platform specific code
 306 }
 307
 308
 309 uint32_t Vid_current_mode;
 310
 311
 312 int vid_set_mode(uint32_t mode)
 313 {
 314         short w, h;
 315
 316 #ifdef NOGRAPH
 317 return 0;
 318 #endif
 319 //      mode=0;
 320         if (mode<=0)
 321                 return 0;
 322
 323         if (mode == Vid_current_mode)
 324                 return 0;
 325
 326         w=SM_W(mode);
 327         h=SM_H(mode);
 328         Vid_current_mode = mode;
 329
 330         //if (screen != NULL) gr_palette_clear();
 331
 332 //      ogl_init_state();
 333
 334         gr_init_screen(BM_OGL, w, h, 0, 0, w, NULL);
 335
 336         //gr_enable_default_palette_loading();
 337
 338         ogl_init_window(w,h);//platform specific code
 339
 340         ogl_get_verinfo();
 341
 342         OGL_VIEWPORT(0,0,w,h);
 343
 344         ogl_set_screen_mode();
 345
 346 //      gamefont_choose_game_font(w,h);
 347
 348         return 0;
 349 }
 350
 351 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 352 int ogl_atotexfilti(char *a,int min){
 353         GLstrcmptestr(a,NEAREST);
 354         GLstrcmptestr(a,LINEAR);
 355         if (min){//mipmaps are valid only for the min filter
 356                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 357                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 358                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 359                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 360         }
 361         Error("unknown/invalid texture filter %s\n",a);
 362 //      return GL_NEAREST;
 363 }
 364 int ogl_testneedmipmaps(int i){
 365         switch (i){
 366                 case GL_NEAREST:
 367                 case GL_LINEAR:
 368                         return 0;
 369                 case GL_NEAREST_MIPMAP_NEAREST:
 370                 case GL_NEAREST_MIPMAP_LINEAR:
 371                 case GL_LINEAR_MIPMAP_NEAREST:
 372                 case GL_LINEAR_MIPMAP_LINEAR:
 373                         return 1;
 374         }
 375         Error("unknown texture filter %x\n",i);
 376 //      return -1;
 377 }
 378
 379
 380 void ogl_cmd_texturemode(int argc, char **argv)
 381 {
 382         if (argc < 2)
 383                 return;
 384
 385         if (!stricmp(argv[1], "GL_NEAREST")) {
 386                 GL_texminfilt = GL_NEAREST;
 387                 GL_texmagfilt = GL_NEAREST;
 388         } else if (!stricmp(argv[1], "GL_LINEAR")) {
 389                 GL_texminfilt = GL_LINEAR;
 390                 GL_texmagfilt = GL_LINEAR;
 391         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_NEAREST")) {
 392                 GL_texminfilt = GL_NEAREST_MIPMAP_NEAREST;
 393                 GL_texmagfilt = GL_NEAREST;
 394         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_NEAREST")) {
 395                 GL_texminfilt = GL_LINEAR_MIPMAP_NEAREST;
 396                 GL_texmagfilt = GL_LINEAR;
 397         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_LINEAR")) {
 398                 GL_texminfilt = GL_NEAREST_MIPMAP_LINEAR;
 399                 GL_texmagfilt = GL_NEAREST;
 400         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_LINEAR")) {
 401                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 402                 GL_texmagfilt = GL_LINEAR;
 403         } else
 404                 return;
 405
 406         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 407
 408         ogl_smash_texture_list_internal();
 409 }
 410
 411
 412 #ifdef OGL_RUNTIME_LOAD
 413 #ifdef _WIN32
 414 char *OglLibPath="opengl32.dll";
 415 #endif
 416 #ifdef __unix__
 417 char *OglLibPath="libGL.so";
 418 #endif
 419 #ifdef macintosh
 420 char *OglLibPath = NULL;
 421 #endif
 422
 423 int ogl_rt_loaded=0;
 424 int ogl_init_load_library(void)
 425 {
 426         int retcode=0;
 427         if (!ogl_rt_loaded){
 428                 int t;
 429                 if ((t=FindArg("-gl_library")))
 430                         OglLibPath=Args[t+1];
 431
 432                 retcode = OpenGL_LoadLibrary(true);
 433                 if(retcode)
 434                 {
 435                         mprintf((0,"Opengl loaded ok\n"));
 436
 437                         if(!glEnd)
 438                         {
 439                                 Error("Opengl: Functions not imported\n");
 440                         }
 441                 }else{
 442                         Error("Opengl: error loading %s\n", OglLibPath? OglLibPath : SDL_GetError());
 443                 }
 444                 ogl_rt_loaded=1;
 445         }
 446         return retcode;
 447 }
 448 #endif
 449
 450
 451 int vid_init(void)
 452 {
 453         int t, glt = 0;
 454
 455         // Only do this function once!
 456         if (vid_installed == 1)
 457                 return -1;
 458
 459
 460 #ifdef OGL_RUNTIME_LOAD
 461         ogl_init_load_library();
 462 #endif
 463
 464 #ifdef VID_SUPPORTS_FULLSCREEN_TOGGLE
 465         if (FindArg("-gl_voodoo")){
 466                 ogl_voodoohack=1;
 467                 vid_toggle_fullscreen();
 468         }
 469         if (FindArg("-fullscreen"))
 470                 vid_toggle_fullscreen();
 471 #endif
 472         if ((glt=FindArg("-gl_alttexmerge")))
 473                 ogl_alttexmerge=1;
 474         if ((t=FindArg("-gl_stdtexmerge")))
 475                 if (t>=glt)//allow overriding of earlier args
 476                         ogl_alttexmerge=0;
 477
 478         if ((glt = FindArg("-gl_16bittextures")))
 479         {
 480                 ogl_rgba_internalformat = GL_RGB5_A1;
 481                 ogl_rgb_internalformat = GL_RGB5;
 482         }
 483
 484         if ((glt=FindArg("-gl_mipmap"))){
 485                 GL_texmagfilt=GL_LINEAR;
 486                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 487         }
 488         if ((glt=FindArg("-gl_trilinear")))
 489         {
 490                 GL_texmagfilt = GL_LINEAR;
 491                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 492         }
 493         if ((t=FindArg("-gl_simple"))){
 494                 if (t>=glt){//allow overriding of earlier args
 495                         glt=t;
 496                         GL_texmagfilt=GL_NEAREST;
 497                         GL_texminfilt=GL_NEAREST;
 498                 }
 499         }
 500         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 501                 if (t>=glt)//allow overriding of earlier args
 502                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 503         }
 504         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 505                 if (t>=glt)//allow overriding of earlier args
 506                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 507         }
 508         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 509
 510         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 511         {
 512                 GL_texanisofilt=atof(Args[t + 1]);
 513         }
 514
 515         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 516
 517
 518         if ((t=FindArg("-gl_vidmem"))){
 519                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 520         }
 521         if ((t=FindArg("-gl_reticle"))){
 522                 gl_reticle=atoi(Args[t+1]);
 523         }
 524         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 525
 526         ogl_init();//platform specific initialization
 527
 528         ogl_init_texture_list_internal();
 529
 530         cmd_addcommand("gl_texturemode", ogl_cmd_texturemode);
 531
 532         vid_installed = 1;
 533
 534         atexit(vid_close);
 535
 536         return 0;
 537 }
 538
 539
 540 void vid_close(void)
 541 {
 542 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 543         ogl_brightness_r = ogl_brightness_g = ogl_brightness_b = 0;
 544         ogl_setbrightness_internal();
 545
 546         ogl_close();//platform specific code
 547
 548 #ifdef OGL_RUNTIME_LOAD
 549         if (ogl_rt_loaded)
 550                 OpenGL_LoadLibrary(false);
 551 #endif
 552 }
 553 extern int r_upixelc;
 554 void ogl_upixelc(int x, int y, int c){
 555         r_upixelc++;
 556 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 557 //      if(Function_mode != FMODE_GAME){
 558 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 559 //      }else{
 560                 OGL_DISABLE(TEXTURE_2D);
 561                 glPointSize(1.0);
 562                 glBegin(GL_POINTS);
 563 //              glBegin(GL_LINES);
 564 //      ogl_pal=gr_current_pal;
 565                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 566 //      ogl_pal=gr_palette;
 567                 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);
 568 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 569                 glEnd();
 570 //      }
 571 }
 572 void ogl_urect(int left,int top,int right,int bot){
 573         GLfloat xo,yo,xf,yf;
 574         int c=COLOR;
 575
 576         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 577         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 578         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 579         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 580
 581         OGL_DISABLE(TEXTURE_2D);
 582         if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
 583                 glColor3f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c));
 584         else
 585                 glColor4f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
 586         glBegin(GL_QUADS);
 587         glVertex2f(xo,yo);
 588         glVertex2f(xo,yf);
 589         glVertex2f(xf,yf);
 590         glVertex2f(xf,yo);
 591         glEnd();
 592 }
 593 void ogl_ulinec(int left,int top,int right,int bot,int c){
 594         GLfloat xo,yo,xf,yf;
 595
 596         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 597         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 598         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 599         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 600
 601         OGL_DISABLE(TEXTURE_2D);
 602         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 603         glBegin(GL_LINES);
 604         glVertex2f(xo,yo);
 605         glVertex2f(xf,yf);
 606         glEnd();
 607 }
 608
 609
 610 GLfloat last_r=0, last_g=0, last_b=0;
 611 int do_pal_step=0;
 612 void ogl_do_palfx(void){
 613 //      GLfloat r,g,b,a;
 614         OGL_DISABLE(TEXTURE_2D);
 615         if (gr_palette_faded_out){
 616 /*              glEnable(GL_BLEND);
 617                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 618                 glColor3f(0,0,0);
 619 //              r=g=b=0.0;a=1.0;
 620         }else{
 621                 if (do_pal_step){
 622                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 623                         glEnable(GL_BLEND);
 624                         glBlendFunc(GL_ONE,GL_ONE);
 625                         glColor3f(last_r,last_g,last_b);
 626 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 627                 }else
 628                         return;
 629         }
 630
 631
 632         glBegin(GL_QUADS);
 633         glVertex2f(0,0);
 634         glVertex2f(0,1);
 635         glVertex2f(1,1);
 636         glVertex2f(1,0);
 637         glEnd();
 638
 639         glEnable(GL_BLEND);
 640         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 641 }
 642
 643 void gr_palette_clear()
 644 {
 645         gr_palette_faded_out=1;
 646 }
 647
 648
 649 int ogl_brightness_ok = 0;
 650 int ogl_setgammaramp_ok = 1;
 651 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 652 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 653
 654 void gr_palette_step_up(int r, int g, int b)
 655 {
 656         if (gr_palette_faded_out)
 657                 return;
 658
 659         old_b_r = ogl_brightness_r;
 660         old_b_g = ogl_brightness_g;
 661         old_b_b = ogl_brightness_b;
 662
 663         ogl_brightness_r = max(r + gr_palette_gamma.intval, 0);
 664         ogl_brightness_g = max(g + gr_palette_gamma.intval, 0);
 665         ogl_brightness_b = max(b + gr_palette_gamma.intval, 0);
 666
 667         if (ogl_setgammaramp_ok &&
 668             (old_b_r != ogl_brightness_r ||
 669              old_b_g != ogl_brightness_g ||
 670              old_b_b != ogl_brightness_b))
 671                 ogl_brightness_ok = !ogl_setbrightness_internal();
 672
 673         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 674         {
 675                 last_r = ogl_brightness_r / 63.0;
 676                 last_g = ogl_brightness_g / 63.0;
 677                 last_b = ogl_brightness_b / 63.0;
 678
 679                 do_pal_step = (r || g || b || gr_palette_gamma.intval);
 680         }
 681         else
 682         {
 683                 do_pal_step = 0;
 684         }
 685 }
 686
 687
 688 void gr_palette_load( ubyte *pal )
 689 {
 690  int i;//, j;
 691
 692  for (i=0; i<768; i++ ) {
 693      gr_current_pal[i] = pal[i];
 694      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 695  }
 696  //palette = screen->format->palette;
 697
 698  gr_palette_faded_out=0;
 699
 700         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 701
 702  init_computed_colors();
 703
 704         ogl_init_shared_palette();
 705 }
 706
 707
 708
 709 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 710 {
 711         int j;
 712         unsigned char *buf;
 713
 714         if (gr_palette_faded_out) return 0;
 715
 716         if (grd_fades_disabled || !ogl_readpixels_ok) {
 717                 gr_palette_faded_out = 1;
 718                 return 0;
 719         }
 720
 721         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 722         glEnable(GL_BLEND);
 723         glDisable(GL_DEPTH_TEST);
 724
 725         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 726         glReadBuffer(GL_FRONT);
 727         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 728
 729         for (j = 0; j < nsteps; j++) {
 730                 glRasterPos2f(0,0);
 731                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 732
 733                 glColor4f(0.0, 0.0, 0.0, (float)(j) / (nsteps - 1)); // go from 0 to 1
 734                 glBegin(GL_QUADS);
 735                 glVertex2i(0, 0);
 736                 glVertex2i(0, 1);
 737                 glVertex2i(1, 1);
 738                 glVertex2i(1, 0);
 739                 glEnd();
 740
 741                 glFlush();
 742
 743                 timer_delay(f0_1 / 10);
 744         }
 745         d_free(buf);
 746
 747         gr_palette_faded_out=1;
 748         return 0;
 749 }
 750
 751
 752
 753 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 754 {
 755         int j;
 756         unsigned char *buf;
 757
 758         if (!gr_palette_faded_out) return 0;
 759
 760         if (grd_fades_disabled || !ogl_readpixels_ok) {
 761                 gr_palette_faded_out = 0;
 762                 return 0;
 763         }
 764
 765         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 766         glEnable(GL_BLEND);
 767         glDisable(GL_DEPTH_TEST);
 768
 769         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 770         glReadBuffer(GL_FRONT);
 771         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 772
 773         for (j = 0; j < nsteps; j++) {
 774                 glRasterPos2f(0,0);
 775                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 776
 777                 glColor4f(0.0, 0.0, 0.0, (float)(nsteps - 1 - j) / (nsteps - 1)); // go from 1 to 0
 778                 glBegin(GL_QUADS);
 779                 glVertex2i(0, 0);
 780                 glVertex2i(0, 1);
 781                 glVertex2i(1, 1);
 782                 glVertex2i(1, 0);
 783                 glEnd();
 784
 785                 glFlush();
 786
 787                 timer_delay(f0_1 / 10);
 788         }
 789         d_free(buf);
 790
 791         gr_palette_faded_out=0;
 792         return 0;
 793 }
 794
 795
 796
 797 void gr_palette_read(ubyte * pal)
 798 {
 799         int i;
 800         for (i=0; i<768; i++ ) {
 801                 pal[i]=gr_current_pal[i];
 802                 if (pal[i] > 63) pal[i] = 63;
 803         }
 804 }
 805
 806 //writes out an uncompressed RGB .tga file
 807 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 808 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 809         PHYSFS_file *f;
 810
 811         f = PHYSFSX_openWriteBuffered(savename);
 812
 813         if (f) {
 814                 GLubyte    targaMagic[12] = { 0, //no identification field
 815                          0,//no colormap
 816                          2,//RGB image (well, BGR, actually)
 817                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 818                 GLubyte blah;
 819                 int r;
 820                 GLubyte *s;
 821                 int x,y;
 822
 823                 //write .TGA header.
 824                 PHYSFS_write(f, targaMagic, sizeof(targaMagic), 1);
 825                 PHYSFS_writeSLE16(f, w);
 826                 PHYSFS_writeSLE16(f, h);
 827                 PHYSFSX_writeU8(f, 24); // 24 bpp
 828                 PHYSFSX_writeU8(f, 0);  // no attribute bits, origin is lowerleft, no interleave
 829
 830                 s=buf;
 831                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 832                         for (x=0;x<w;x++){
 833                                 blah=s[0];
 834                                 s[0]=s[2];
 835                                 s[2]=blah;
 836                                 s+=3;
 837                         }
 838                 }
 839                 x=0;y=w*h*3;
 840                 while (y > 0)
 841                 {
 842                         r = (int)PHYSFS_write(f, buf + x, 1, y);
 843                         if (r<=0){
 844                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 845                                 break;
 846                         }
 847                         x+=r;y-=r;
 848                 }
 849                 PHYSFS_close(f);
 850         }else{
 851                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 852         }
 853 }
 854 void save_screen_shot(int automap_flag)
 855 {
 856 //      fix t1;
 857         char message[100];
 858         static int savenum=0;
 859         char savename[13];
 860         unsigned char *buf;
 861
 862         if (!ogl_readpixels_ok){
 863                 if (!automap_flag)
 864                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 865                 return;
 866         }
 867
 868         stop_time();
 869
 870 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 871         do
 872         {
 873                 if (savenum == 9999)
 874                         savenum = 0;
 875                 sprintf(savename, "scrn%04d.tga", savenum++);
 876         } while (PHYSFS_exists(savename));
 877
 878         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 879 //end this section addition/change - Victor Rachels
 880
 881         if (automap_flag) {
 882 //      save_font = grd_curcanv->cv_font;
 883 //      gr_set_curfont(GAME_FONT);
 884 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 885 //      gr_get_string_size(message,&w,&h,&aw);
 886 //              modex_print_message(32, 2, message);
 887         } else {
 888                 hud_message(MSGC_GAME_FEEDBACK, "%s", message);
 889         }
 890
 891         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 892         glReadBuffer(GL_FRONT);
 893         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 894         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 895         d_free(buf);
 896
 897         key_flush();
 898         start_time();
 899 }