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 #define DECLARE_VARS
  13
  14 #include <stdlib.h>
  15 #include <stdio.h>
  16 #include <string.h>
  17 #ifdef _MSC_VER
  18 #include <windows.h>
  19 #endif
  20
  21 #if !defined(_MSC_VER) && !defined(macintosh)
  22 #include <unistd.h>
  23 #endif
  24 #if !defined(macintosh)
  25 #include <sys/types.h>
  26 #include <sys/stat.h>
  27 #include <fcntl.h>
  28 #endif
  29
  30 #include <errno.h>
  31
  32 #include "inferno.h"
  33 #include "gr.h"
  34 #include "vid.h"
  35 #include "u_mem.h"
  36 #include "error.h"
  37 #include "timer.h"
  38 #include "strutil.h"
  39 #include "mono.h"
  40 #include "args.h"
  41 #include "key.h"
  42 #include "physfsx.h"
  43
  44 #include "internal.h"
  45 #if defined(__APPLE__) && defined(__MACH__)
  46 #include <OpenGL/glu.h>
  47 #undef GL_ARB_multitexture // hack!
  48 #else
  49 #include <GL/glu.h>
  50 #endif
  51
  52
  53 int ogl_voodoohack=0;
  54
  55 int vid_installed = 0;
  56
  57
  58 void gr_palette_clear(); // Function prototype for gr_init;
  59 int gl_initialized=0;
  60 int gl_reticle = 0;
  61
  62 int ogl_fullscreen=0;
  63
  64
  65 int vid_check_fullscreen(void)
  66 {
  67         return ogl_fullscreen;
  68 }
  69
  70
  71 static void do_fullscreen(int f)
  72 {
  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
  83 int vid_toggle_fullscreen(void)
  84 {
  85         do_fullscreen(!ogl_fullscreen);
  86         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  87         return ogl_fullscreen;
  88 }
  89
  90
  91 int vid_toggle_fullscreen_menu(void)
  92 {
  93         unsigned char *buf=NULL;
  94
  95         if (ogl_readpixels_ok){
  96                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  97                 glReadBuffer(GL_FRONT);
  98                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  99         }
 100
 101         do_fullscreen(!ogl_fullscreen);
 102
 103         if (ogl_readpixels_ok){
 104 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 105                 glRasterPos2f(0,0);
 106                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 107                 free(buf);
 108         }
 109         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 110
 111         return ogl_fullscreen;
 112 }
 113
 114 void ogl_init_state(void){
 115         /* select clearing (background) color   */
 116         glClearColor(0.0, 0.0, 0.0, 0.0);
 117         glShadeModel(GL_SMOOTH);
 118
 119         /* initialize viewing values */
 120         glMatrixMode(GL_PROJECTION);
 121         glLoadIdentity();
 122         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 123         glScalef(1.0, -1.0, 1.0);
 124         glTranslatef(0.0, -1.0, 0.0);
 125         gr_palette_step_up(0,0,0);//in case its left over from in game
 126 }
 127
 128 int last_screen_mode=-1;
 129
 130 void ogl_set_screen_mode(void){
 131         if (last_screen_mode==Screen_mode)
 132                 return;
 133         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 134 //      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);
 135         if (Screen_mode==SCREEN_GAME){
 136                 glDrawBuffer(GL_BACK);
 137         }else{
 138                 glClearColor(0.0, 0.0, 0.0, 0.0);
 139                 glDrawBuffer(GL_FRONT);
 140                 glClear(GL_COLOR_BUFFER_BIT);
 141                 glMatrixMode(GL_PROJECTION);
 142                 glLoadIdentity();//clear matrix
 143                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 144                 glMatrixMode(GL_MODELVIEW);
 145                 glLoadIdentity();//clear matrix
 146                 glEnable(GL_BLEND);
 147                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 148         }
 149         last_screen_mode=Screen_mode;
 150 }
 151
 152 void vid_update()
 153 {
 154         if (gl_initialized){
 155
 156                 if(Screen_mode != SCREEN_GAME){
 157                         glFlush();
 158                 }
 159         }
 160 }
 161
 162 const char *gl_vendor, *gl_renderer, *gl_version, *gl_extensions;
 163
 164 void ogl_get_verinfo(void)
 165 {
 166         long t, sgi_max_textures = -1;
 167         GLint arb_max_textures = -1;
 168 #ifdef GL_NV_register_combiners
 169         GLint nv_register_combiners = -1;
 170 #endif
 171         float anisotropic_max = 0;
 172
 173         gl_vendor = (const char *) glGetString (GL_VENDOR);
 174         gl_renderer = (const char *) glGetString (GL_RENDERER);
 175         gl_version = (const char *) glGetString (GL_VERSION);
 176         gl_extensions = (const char *) glGetString (GL_EXTENSIONS);
 177
 178         con_printf(CON_VERBOSE, "OpenGL: vendor: %s\nOpenGL: renderer: %s\nOpenGL: version: %s\n",gl_vendor,gl_renderer,gl_version);
 179
 180         ogl_intensity4_ok = 1;
 181         ogl_luminance4_alpha4_ok = 1;
 182         ogl_rgba2_ok = 1;
 183         ogl_gettexlevelparam_ok = 1;
 184         ogl_setgammaramp_ok = 1;
 185
 186 #ifdef WGL_VIDEO
 187         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 188         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 189         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 190         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 191         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 192         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 193         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 194         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 195         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 196 #endif
 197
 198 #ifdef GL_ARB_multitexture
 199         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 200         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 201 #endif
 202 #ifdef GL_SGIS_multitexture
 203         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 204         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 205 #endif
 206         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 207 #ifdef GL_NV_register_combiners
 208         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 209 #endif
 210
 211         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 212         if (ogl_ext_texture_filter_anisotropic_ok)
 213                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 214
 215 #ifdef GL_EXT_paletted_texture
 216         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 217         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 218 #endif
 219         //add driver specific hacks here.  whee.
 220         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){
 221                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 222                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 223                 ogl_gettexlevelparam_ok=0;//returns random data..
 224         }
 225         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 226                 //displays garbage. reported by
 227                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 228                 //  orulz (Matrox G200)
 229                 ogl_intensity4_ok=0;
 230         }
 231 #ifdef macintosh
 232         if (stricmp(gl_renderer,"3dfx Voodoo 3")==0){ // strangely, includes Voodoo 2
 233                 ogl_gettexlevelparam_ok=0; // Always returns 0
 234         }
 235 #endif
 236
 237         //allow overriding of stuff.
 238 #ifdef GL_ARB_multitexture
 239         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 240                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 241         }
 242         if (ogl_arb_multitexture_ok)
 243                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 244 #endif
 245 #ifdef GL_SGIS_multitexture
 246         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 247                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 248         }
 249         if (ogl_sgis_multitexture_ok)
 250                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 251 #endif
 252 #ifdef GL_NV_register_combiners
 253         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 254         {
 255                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 256         }
 257         if (ogl_nv_register_combiners_ok)
 258                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 259 #endif
 260 #ifdef GL_EXT_paletted_texture
 261         if ((t = FindArg("-gl_paletted_texture_ok")))
 262         {
 263                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 264         }
 265         if ((t = FindArg("-gl_shared_palette_ok")))
 266         {
 267                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 268         }
 269         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 270         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);
 271 #endif
 272         if ((t=FindArg("-gl_intensity4_ok"))){
 273                 ogl_intensity4_ok=atoi(Args[t+1]);
 274         }
 275         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 276                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 277         }
 278         if ((t=FindArg("-gl_rgba2_ok"))){
 279                 ogl_rgba2_ok=atoi(Args[t+1]);
 280         }
 281         if ((t=FindArg("-gl_readpixels_ok"))){
 282                 ogl_readpixels_ok=atoi(Args[t+1]);
 283         }
 284         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 285                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 286         }
 287         if ((t=FindArg("-gl_setgammaramp_ok")))
 288         {
 289                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 290         }
 291
 292         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);
 293 #ifdef GL_NV_register_combiners
 294         con_printf(CON_DEBUG, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 295 #endif
 296         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);
 297 }
 298
 299
 300 int vid_check_mode(uint32_t mode)
 301 {
 302         int w, h;
 303
 304         w = SM_W(mode);
 305         h = SM_H(mode);
 306         return ogl_check_mode(w, h); // platform specific code
 307 }
 308
 309
 310 uint32_t Vid_current_mode;
 311
 312
 313 int vid_set_mode(uint32_t mode)
 314 {
 315         short w, h;
 316
 317 #ifdef NOGRAPH
 318 return 0;
 319 #endif
 320 //      mode=0;
 321         if (mode<=0)
 322                 return 0;
 323
 324         if (mode == Vid_current_mode)
 325                 return 0;
 326
 327         w=SM_W(mode);
 328         h=SM_H(mode);
 329         Vid_current_mode = mode;
 330
 331         //if (screen != NULL) gr_palette_clear();
 332
 333 //      ogl_init_state();
 334
 335         gr_init_screen(BM_OGL, w, h, 0, 0, w, NULL);
 336
 337         //gr_enable_default_palette_loading();
 338
 339         ogl_init_window(w,h);//platform specific code
 340
 341         ogl_get_verinfo();
 342
 343         OGL_VIEWPORT(0,0,w,h);
 344
 345         ogl_set_screen_mode();
 346
 347 //      gamefont_choose_game_font(w,h);
 348
 349         return 0;
 350 }
 351
 352 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 353 int ogl_atotexfilti(char *a,int min){
 354         GLstrcmptestr(a,NEAREST);
 355         GLstrcmptestr(a,LINEAR);
 356         if (min){//mipmaps are valid only for the min filter
 357                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 358                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 359                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 360                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 361         }
 362         Error("unknown/invalid texture filter %s\n",a);
 363 //      return GL_NEAREST;
 364 }
 365 int ogl_testneedmipmaps(int i){
 366         switch (i){
 367                 case GL_NEAREST:
 368                 case GL_LINEAR:
 369                         return 0;
 370                 case GL_NEAREST_MIPMAP_NEAREST:
 371                 case GL_NEAREST_MIPMAP_LINEAR:
 372                 case GL_LINEAR_MIPMAP_NEAREST:
 373                 case GL_LINEAR_MIPMAP_LINEAR:
 374                         return 1;
 375         }
 376         Error("unknown texture filter %x\n",i);
 377 //      return -1;
 378 }
 379
 380
 381 void ogl_cmd_texturemode(int argc, char **argv)
 382 {
 383         if (argc < 2) {
 384                 cmd_insertf("help %s", argv[0]);
 385                 return;
 386         }
 387
 388         if (!stricmp(argv[1], "GL_NEAREST")) {
 389                 GL_texminfilt = GL_NEAREST;
 390                 GL_texmagfilt = GL_NEAREST;
 391         } else if (!stricmp(argv[1], "GL_LINEAR")) {
 392                 GL_texminfilt = GL_LINEAR;
 393                 GL_texmagfilt = GL_LINEAR;
 394         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_NEAREST")) {
 395                 GL_texminfilt = GL_NEAREST_MIPMAP_NEAREST;
 396                 GL_texmagfilt = GL_NEAREST;
 397         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_NEAREST")) {
 398                 GL_texminfilt = GL_LINEAR_MIPMAP_NEAREST;
 399                 GL_texmagfilt = GL_LINEAR;
 400         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_LINEAR")) {
 401                 GL_texminfilt = GL_NEAREST_MIPMAP_LINEAR;
 402                 GL_texmagfilt = GL_NEAREST;
 403         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_LINEAR")) {
 404                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 405                 GL_texmagfilt = GL_LINEAR;
 406         } else
 407                 return;
 408
 409         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 410
 411         ogl_smash_texture_list_internal();
 412 }
 413
 414
 415 #ifdef OGL_RUNTIME_LOAD
 416 #ifdef _WIN32
 417 char *OglLibPath="opengl32.dll";
 418 #endif
 419 #ifdef __unix__
 420 char *OglLibPath="libGL.so";
 421 #endif
 422 #ifdef macintosh
 423 char *OglLibPath = NULL;
 424 #endif
 425
 426 int ogl_rt_loaded=0;
 427 int ogl_init_load_library(void)
 428 {
 429         int retcode=0;
 430         if (!ogl_rt_loaded){
 431                 int t;
 432                 if ((t=FindArg("-gl_library")))
 433                         OglLibPath=Args[t+1];
 434
 435                 retcode = OpenGL_LoadLibrary(true);
 436                 if(retcode)
 437                 {
 438                         mprintf((0,"Opengl loaded ok\n"));
 439
 440                         if(!glEnd)
 441                         {
 442                                 Error("Opengl: Functions not imported\n");
 443                         }
 444                 }else{
 445                         Error("Opengl: error loading %s\n", OglLibPath);
 446                 }
 447                 ogl_rt_loaded=1;
 448         }
 449         return retcode;
 450 }
 451 #endif
 452
 453
 454 int vid_init(void)
 455 {
 456         int t, glt = 0;
 457
 458         // Only do this function once!
 459         if (vid_installed == 1)
 460                 return -1;
 461
 462 #ifdef OGL_RUNTIME_LOAD
 463         ogl_init_load_library();
 464 #endif
 465
 466 #ifdef VID_SUPPORTS_FULLSCREEN_TOGGLE
 467         if (FindArg("-gl_voodoo")){
 468                 ogl_voodoohack=1;
 469                 vid_toggle_fullscreen();
 470         }
 471         if (FindArg("-fullscreen"))
 472                 vid_toggle_fullscreen();
 473 #endif
 474         if ((glt=FindArg("-gl_alttexmerge")))
 475                 ogl_alttexmerge=1;
 476         if ((t=FindArg("-gl_stdtexmerge")))
 477                 if (t>=glt)//allow overriding of earlier args
 478                         ogl_alttexmerge=0;
 479
 480         if ((glt = FindArg("-gl_16bittextures")))
 481         {
 482                 ogl_rgba_internalformat = GL_RGB5_A1;
 483                 ogl_rgb_internalformat = GL_RGB5;
 484         }
 485
 486         if ((glt=FindArg("-gl_mipmap"))){
 487                 GL_texmagfilt=GL_LINEAR;
 488                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 489         }
 490         if ((glt=FindArg("-gl_trilinear")))
 491         {
 492                 GL_texmagfilt = GL_LINEAR;
 493                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 494         }
 495         if ((t=FindArg("-gl_simple"))){
 496                 if (t>=glt){//allow overriding of earlier args
 497                         glt=t;
 498                         GL_texmagfilt=GL_NEAREST;
 499                         GL_texminfilt=GL_NEAREST;
 500                 }
 501         }
 502         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 503                 if (t>=glt)//allow overriding of earlier args
 504                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 505         }
 506         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 507                 if (t>=glt)//allow overriding of earlier args
 508                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 509         }
 510         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 511
 512         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 513         {
 514                 GL_texanisofilt=atof(Args[t + 1]);
 515         }
 516
 517         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 518
 519
 520         if ((t=FindArg("-gl_vidmem"))){
 521                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 522         }
 523         if ((t=FindArg("-gl_reticle"))){
 524                 gl_reticle=atoi(Args[t+1]);
 525         }
 526         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 527
 528         ogl_init();//platform specific initialization
 529
 530         ogl_init_texture_list_internal();
 531
 532         cmd_addcommand("gl_texturemode", ogl_cmd_texturemode, "gl_texturemode <x>\n" "    use OpenGL texture mode <x>. Available mode are\n"
 533                                                                                      "        GL_NEAREST\n"
 534                                                                                      "        GL_LINEAR\n"
 535                                                                                      "        GL_NEAREST_MIPMAP_NEAREST\n"
 536                                                                                      "        GL_LINEAR_MIPMAP_NEAREST\n"
 537                                                                                      "        GL_NEAREST_MIPMAP_LINEAR\n"
 538                                                                                      "        GL_LINEAR_MIPMAP_LINEAR");
 539
 540         vid_installed = 1;
 541
 542         atexit(vid_close);
 543
 544         return 0;
 545 }
 546
 547
 548 void vid_close(void)
 549 {
 550 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 551         ogl_brightness_r = ogl_brightness_g = ogl_brightness_b = 0;
 552         ogl_setbrightness_internal();
 553
 554         ogl_close();//platform specific code
 555
 556 #ifdef OGL_RUNTIME_LOAD
 557         if (ogl_rt_loaded)
 558                 OpenGL_LoadLibrary(false);
 559 #endif
 560 }
 561 extern int r_upixelc;
 562 void ogl_upixelc(int x, int y, int c){
 563         r_upixelc++;
 564 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 565 //      if(Function_mode != FMODE_GAME){
 566 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 567 //      }else{
 568                 OGL_DISABLE(TEXTURE_2D);
 569                 glPointSize(1.0);
 570                 glBegin(GL_POINTS);
 571 //              glBegin(GL_LINES);
 572 //      ogl_pal=gr_current_pal;
 573                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 574 //      ogl_pal=gr_palette;
 575                 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);
 576 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 577                 glEnd();
 578 //      }
 579 }
 580 void ogl_urect(int left,int top,int right,int bot){
 581         GLfloat xo,yo,xf,yf;
 582         int c=COLOR;
 583
 584         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 585         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 586         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 587         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 588
 589         OGL_DISABLE(TEXTURE_2D);
 590         if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
 591                 glColor3f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c));
 592         else
 593                 glColor4f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
 594         glBegin(GL_QUADS);
 595         glVertex2f(xo,yo);
 596         glVertex2f(xo,yf);
 597         glVertex2f(xf,yf);
 598         glVertex2f(xf,yo);
 599         glEnd();
 600 }
 601 void ogl_ulinec(int left,int top,int right,int bot,int c){
 602         GLfloat xo,yo,xf,yf;
 603
 604         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 605         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 606         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 607         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 608
 609         OGL_DISABLE(TEXTURE_2D);
 610         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 611         glBegin(GL_LINES);
 612         glVertex2f(xo,yo);
 613         glVertex2f(xf,yf);
 614         glEnd();
 615 }
 616
 617
 618 GLfloat last_r=0, last_g=0, last_b=0;
 619 int do_pal_step=0;
 620 void ogl_do_palfx(void){
 621 //      GLfloat r,g,b,a;
 622         OGL_DISABLE(TEXTURE_2D);
 623         if (gr_palette_faded_out){
 624 /*              glEnable(GL_BLEND);
 625                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 626                 glColor3f(0,0,0);
 627 //              r=g=b=0.0;a=1.0;
 628         }else{
 629                 if (do_pal_step){
 630                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 631                         glEnable(GL_BLEND);
 632                         glBlendFunc(GL_ONE,GL_ONE);
 633                         glColor3f(last_r,last_g,last_b);
 634 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 635                 }else
 636                         return;
 637         }
 638
 639
 640         glBegin(GL_QUADS);
 641         glVertex2f(0,0);
 642         glVertex2f(0,1);
 643         glVertex2f(1,1);
 644         glVertex2f(1,0);
 645         glEnd();
 646
 647         glEnable(GL_BLEND);
 648         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 649 }
 650
 651 void gr_palette_clear()
 652 {
 653         gr_palette_faded_out=1;
 654 }
 655
 656
 657 int ogl_brightness_ok = 0;
 658 int ogl_setgammaramp_ok = 1;
 659 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 660 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 661
 662 void gr_palette_step_up(int r, int g, int b)
 663 {
 664         if (gr_palette_faded_out)
 665                 return;
 666
 667         old_b_r = ogl_brightness_r;
 668         old_b_g = ogl_brightness_g;
 669         old_b_b = ogl_brightness_b;
 670
 671         ogl_brightness_r = max(r + gr_palette_gamma.intval, 0);
 672         ogl_brightness_g = max(g + gr_palette_gamma.intval, 0);
 673         ogl_brightness_b = max(b + gr_palette_gamma.intval, 0);
 674
 675         if (ogl_setgammaramp_ok &&
 676             (old_b_r != ogl_brightness_r ||
 677              old_b_g != ogl_brightness_g ||
 678              old_b_b != ogl_brightness_b))
 679                 ogl_brightness_ok = !ogl_setbrightness_internal();
 680
 681         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 682         {
 683                 last_r = ogl_brightness_r / 63.0;
 684                 last_g = ogl_brightness_g / 63.0;
 685                 last_b = ogl_brightness_b / 63.0;
 686
 687                 do_pal_step = (r || g || b || gr_palette_gamma.intval);
 688         }
 689         else
 690         {
 691                 do_pal_step = 0;
 692         }
 693 }
 694
 695
 696 void gr_palette_load( ubyte *pal )
 697 {
 698  int i;//, j;
 699
 700  for (i=0; i<768; i++ ) {
 701      gr_current_pal[i] = pal[i];
 702      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 703  }
 704  //palette = screen->format->palette;
 705
 706  gr_palette_faded_out=0;
 707
 708         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 709
 710  init_computed_colors();
 711
 712         ogl_init_shared_palette();
 713 }
 714
 715
 716
 717 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 718 {
 719         int j;
 720         unsigned char *buf;
 721
 722         if (gr_palette_faded_out) return 0;
 723
 724         if (grd_fades_disabled || !ogl_readpixels_ok) {
 725                 gr_palette_faded_out = 1;
 726                 return 0;
 727         }
 728
 729         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 730         glEnable(GL_BLEND);
 731         glDisable(GL_DEPTH_TEST);
 732
 733         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 734         glReadBuffer(GL_FRONT);
 735         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 736
 737         for (j = 0; j < nsteps; j++) {
 738                 glRasterPos2f(0,0);
 739                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 740
 741                 glColor4f(0.0, 0.0, 0.0, (float)(j) / (nsteps - 1)); // go from 0 to 1
 742                 glBegin(GL_QUADS);
 743                 glVertex2i(0, 0);
 744                 glVertex2i(0, 1);
 745                 glVertex2i(1, 1);
 746                 glVertex2i(1, 0);
 747                 glEnd();
 748
 749                 glFlush();
 750
 751                 timer_delay(f0_1 / 10);
 752         }
 753         d_free(buf);
 754
 755         gr_palette_faded_out=1;
 756         return 0;
 757 }
 758
 759
 760
 761 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 762 {
 763         int j;
 764         unsigned char *buf;
 765
 766         if (!gr_palette_faded_out) return 0;
 767
 768         if (grd_fades_disabled || !ogl_readpixels_ok) {
 769                 gr_palette_faded_out = 0;
 770                 return 0;
 771         }
 772
 773         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 774         glEnable(GL_BLEND);
 775         glDisable(GL_DEPTH_TEST);
 776
 777         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 778         glReadBuffer(GL_FRONT);
 779         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 780
 781         for (j = 0; j < nsteps; j++) {
 782                 glRasterPos2f(0,0);
 783                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 784
 785                 glColor4f(0.0, 0.0, 0.0, (float)(nsteps - 1 - j) / (nsteps - 1)); // go from 1 to 0
 786                 glBegin(GL_QUADS);
 787                 glVertex2i(0, 0);
 788                 glVertex2i(0, 1);
 789                 glVertex2i(1, 1);
 790                 glVertex2i(1, 0);
 791                 glEnd();
 792
 793                 glFlush();
 794
 795                 timer_delay(f0_1 / 10);
 796         }
 797         d_free(buf);
 798
 799         gr_palette_faded_out=0;
 800         return 0;
 801 }
 802
 803
 804
 805 void gr_palette_read(ubyte * pal)
 806 {
 807         int i;
 808         for (i=0; i<768; i++ ) {
 809                 pal[i]=gr_current_pal[i];
 810                 if (pal[i] > 63) pal[i] = 63;
 811         }
 812 }
 813
 814 //writes out an uncompressed RGB .tga file
 815 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 816 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 817         PHYSFS_file *f;
 818
 819         f = PHYSFSX_openWriteBuffered(savename);
 820
 821         if (f) {
 822                 GLubyte    targaMagic[12] = { 0, //no identification field
 823                          0,//no colormap
 824                          2,//RGB image (well, BGR, actually)
 825                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 826                 GLubyte blah;
 827                 int r;
 828                 GLubyte *s;
 829                 int x,y;
 830
 831                 //write .TGA header.
 832                 PHYSFS_write(f, targaMagic, sizeof(targaMagic), 1);
 833                 PHYSFS_writeSLE16(f, w);
 834                 PHYSFS_writeSLE16(f, h);
 835                 PHYSFSX_writeU8(f, 24); // 24 bpp
 836                 PHYSFSX_writeU8(f, 0);  // no attribute bits, origin is lowerleft, no interleave
 837
 838                 s=buf;
 839                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 840                         for (x=0;x<w;x++){
 841                                 blah=s[0];
 842                                 s[0]=s[2];
 843                                 s[2]=blah;
 844                                 s+=3;
 845                         }
 846                 }
 847                 x=0;y=w*h*3;
 848                 while (y > 0)
 849                 {
 850                         r = (int)PHYSFS_write(f, buf + x, 1, y);
 851                         if (r<=0){
 852                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 853                                 break;
 854                         }
 855                         x+=r;y-=r;
 856                 }
 857                 PHYSFS_close(f);
 858         }else{
 859                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 860         }
 861 }
 862 void save_screen_shot(int automap_flag)
 863 {
 864 //      fix t1;
 865         char message[100];
 866         static int savenum=0;
 867         char savename[13];
 868         unsigned char *buf;
 869
 870         if (!ogl_readpixels_ok){
 871                 if (!automap_flag)
 872                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 873                 return;
 874         }
 875
 876         stop_time();
 877
 878 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 879         do
 880         {
 881                 if (savenum == 9999)
 882                         savenum = 0;
 883                 sprintf(savename, "scrn%04d.tga", savenum++);
 884         } while (PHYSFS_exists(savename));
 885
 886         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 887 //end this section addition/change - Victor Rachels
 888
 889         if (automap_flag) {
 890 //      save_font = grd_curcanv->cv_font;
 891 //      gr_set_curfont(GAME_FONT);
 892 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 893 //      gr_get_string_size(message,&w,&h,&aw);
 894 //              modex_print_message(32, 2, message);
 895         } else {
 896                 hud_message(MSGC_GAME_FEEDBACK, "%s", message);
 897         }
 898
 899         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 900         glReadBuffer(GL_FRONT);
 901         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 902         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 903         d_free(buf);
 904
 905         key_flush();
 906         start_time();
 907 }