arch/ogl/gr.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 "hudmsg.h"
  31 #include "inferno.h"
  32 #include "text.h"
  33 #include "gr.h"
  34 #include "gamefont.h"
  35 #include "grdef.h"
  36 #include "palette.h"
  37 #include "u_mem.h"
  38 #include "error.h"
  39
  40 #include "inferno.h"
  41 #include "screens.h"
  42 #include "timer.h"
  43 #include "strutil.h"
  44 #include "mono.h"
  45 #include "args.h"
  46 #include "key.h"
  47 #include "physfsx.h"
  48
  49 #define DECLARE_VARS
  50 #include "internal.h"
  51 #if defined(__APPLE__) && defined(__MACH__)
  52 #include <OpenGL/glu.h>
  53 #undef GL_ARB_multitexture // hack!
  54 #else
  55 #include <GL/glu.h>
  56 #endif
  57
  58 int ogl_voodoohack=0;
  59
  60 int gr_installed = 0;
  61
  62
  63 void gr_palette_clear(); // Function prototype for gr_init;
  64 int gl_initialized=0;
  65 int gl_reticle = 0;
  66
  67 int ogl_fullscreen=0;
  68
  69 int gr_check_fullscreen(void){
  70         return ogl_fullscreen;
  71 }
  72
  73 void gr_do_fullscreen(int f){
  74         if (ogl_voodoohack)
  75                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  76         else
  77                 ogl_fullscreen=f;
  78         if (gl_initialized){
  79                 ogl_do_fullscreen_internal();
  80         }
  81 }
  82
  83 int gr_toggle_fullscreen(void){
  84         gr_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 int arch_toggle_fullscreen_menu(void){
  90         unsigned char *buf=NULL;
  91
  92         if (ogl_readpixels_ok){
  93                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  94                 glReadBuffer(GL_FRONT);
  95                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  96         }
  97
  98         gr_do_fullscreen(!ogl_fullscreen);
  99
 100         if (ogl_readpixels_ok){
 101 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 102                 glRasterPos2f(0,0);
 103                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 104                 free(buf);
 105         }
 106         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 107
 108         return ogl_fullscreen;
 109 }
 110
 111 void ogl_init_state(void){
 112         /* select clearing (background) color   */
 113         glClearColor(0.0, 0.0, 0.0, 0.0);
 114         glShadeModel(GL_SMOOTH);
 115
 116         /* initialize viewing values */
 117         glMatrixMode(GL_PROJECTION);
 118         glLoadIdentity();
 119         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 120         glScalef(1.0, -1.0, 1.0);
 121         glTranslatef(0.0, -1.0, 0.0);
 122         gr_palette_step_up(0,0,0);//in case its left over from in game
 123 }
 124
 125 int last_screen_mode=-1;
 126
 127 void ogl_set_screen_mode(void){
 128         if (last_screen_mode==Screen_mode)
 129                 return;
 130         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 131 //      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);
 132         if (Screen_mode==SCREEN_GAME){
 133                 glDrawBuffer(GL_BACK);
 134         }else{
 135                 glClearColor(0.0, 0.0, 0.0, 0.0);
 136                 glDrawBuffer(GL_FRONT);
 137                 glClear(GL_COLOR_BUFFER_BIT);
 138                 glMatrixMode(GL_PROJECTION);
 139                 glLoadIdentity();//clear matrix
 140                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 141                 glMatrixMode(GL_MODELVIEW);
 142                 glLoadIdentity();//clear matrix
 143                 glEnable(GL_BLEND);
 144                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 145         }
 146         last_screen_mode=Screen_mode;
 147 }
 148
 149 void gr_update()
 150 {
 151         if (gl_initialized){
 152
 153                 if(Screen_mode != SCREEN_GAME){
 154                         glFlush();
 155                 }
 156         }
 157 }
 158
 159 const char *gl_vendor, *gl_renderer, *gl_version, *gl_extensions;
 160
 161 void ogl_get_verinfo(void)
 162 {
 163         long t, sgi_max_textures = -1;
 164         GLint arb_max_textures = -1;
 165 #ifdef GL_NV_register_combiners
 166         long nv_register_combiners = -1;
 167 #endif
 168         float anisotropic_max = 0;
 169
 170         gl_vendor = (const char *) glGetString (GL_VENDOR);
 171         gl_renderer = (const char *) glGetString (GL_RENDERER);
 172         gl_version = (const char *) glGetString (GL_VERSION);
 173         gl_extensions = (const char *) glGetString (GL_EXTENSIONS);
 174
 175         con_printf(CON_VERBOSE, "OpenGL: vendor: %s\nOpenGL: renderer: %s\nOpenGL: version: %s\n",gl_vendor,gl_renderer,gl_version);
 176
 177         ogl_intensity4_ok = 1;
 178         ogl_luminance4_alpha4_ok = 1;
 179         ogl_rgba2_ok = 1;
 180         ogl_gettexlevelparam_ok = 1;
 181         ogl_setgammaramp_ok = 1;
 182
 183 #ifdef WGL_VIDEO
 184         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 185         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 186         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 187         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 188         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 189         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 190         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 191         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 192         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 193 #endif
 194
 195 #ifdef GL_ARB_multitexture
 196         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 197         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 198 #endif
 199 #ifdef GL_SGIS_multitexture
 200         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 201         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 202 #endif
 203         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 204 #ifdef GL_NV_register_combiners
 205         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 206 #endif
 207
 208         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 209         if (ogl_ext_texture_filter_anisotropic_ok)
 210                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 211
 212 #ifdef GL_EXT_paletted_texture
 213         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 214         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 215 #endif
 216         //add driver specific hacks here.  whee.
 217         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){
 218                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 219                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 220                 ogl_gettexlevelparam_ok=0;//returns random data..
 221         }
 222         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 223                 //displays garbage. reported by
 224                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 225                 //  orulz (Matrox G200)
 226                 ogl_intensity4_ok=0;
 227         }
 228 #ifdef macintosh
 229         if (stricmp(gl_renderer,"3dfx Voodoo 3")==0){ // strangely, includes Voodoo 2
 230                 ogl_gettexlevelparam_ok=0; // Always returns 0
 231         }
 232 #endif
 233
 234         //allow overriding of stuff.
 235 #ifdef GL_ARB_multitexture
 236         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 237                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 238         }
 239         if (ogl_arb_multitexture_ok)
 240                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 241 #endif
 242 #ifdef GL_SGIS_multitexture
 243         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 244                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 245         }
 246         if (ogl_sgis_multitexture_ok)
 247                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 248 #endif
 249 #ifdef GL_NV_register_combiners
 250         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 251         {
 252                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 253         }
 254         if (ogl_nv_register_combiners_ok)
 255                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 256 #endif
 257 #ifdef GL_EXT_paletted_texture
 258         if ((t = FindArg("-gl_paletted_texture_ok")))
 259         {
 260                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 261         }
 262         if ((t = FindArg("-gl_shared_palette_ok")))
 263         {
 264                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 265         }
 266         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 267         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);
 268 #endif
 269         if ((t=FindArg("-gl_intensity4_ok"))){
 270                 ogl_intensity4_ok=atoi(Args[t+1]);
 271         }
 272         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 273                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 274         }
 275         if ((t=FindArg("-gl_rgba2_ok"))){
 276                 ogl_rgba2_ok=atoi(Args[t+1]);
 277         }
 278         if ((t=FindArg("-gl_readpixels_ok"))){
 279                 ogl_readpixels_ok=atoi(Args[t+1]);
 280         }
 281         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 282                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 283         }
 284         if ((t=FindArg("-gl_setgammaramp_ok")))
 285         {
 286                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 287         }
 288
 289         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);
 290 #ifdef GL_NV_register_combiners
 291         con_printf(CON_DEBUG, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 292 #endif
 293         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);
 294 }
 295
 296
 297 int gr_check_mode(uint32_t mode)
 298 {
 299         int w, h;
 300
 301         w = SM_W(mode);
 302         h = SM_H(mode);
 303         return ogl_check_mode(w, h); // platform specific code
 304 }
 305
 306
 307 extern uint32_t VGA_current_mode; // DPH: kludge - remove at all costs
 308
 309 int gr_set_mode(uint32_t mode)
 310 {
 311         short w, h;
 312         char *gr_bm_data;
 313
 314 #ifdef NOGRAPH
 315 return 0;
 316 #endif
 317 //      mode=0;
 318         if (mode<=0)
 319                 return 0;
 320
 321         if (mode == VGA_current_mode)
 322                 return 0;
 323
 324         w=SM_W(mode);
 325         h=SM_H(mode);
 326         VGA_current_mode = mode;
 327
 328         //if (screen != NULL) gr_palette_clear();
 329
 330 //      ogl_init_state();
 331
 332         gr_bm_data=(char *)grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 333         memset( grd_curscreen, 0, sizeof(grs_screen));
 334         grd_curscreen->sc_mode = mode;
 335         grd_curscreen->sc_w = w;
 336         grd_curscreen->sc_h = h;
 337         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 338         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 339         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 340         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 341         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 342         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 343         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 344         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 345         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 346 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 347         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 348         gr_set_current_canvas(NULL);
 349         //gr_enable_default_palette_loading();
 350
 351         ogl_init_window(w,h);//platform specific code
 352
 353         ogl_get_verinfo();
 354
 355         OGL_VIEWPORT(0,0,w,h);
 356
 357         ogl_set_screen_mode();
 358
 359 //      gamefont_choose_game_font(w,h);
 360
 361         return 0;
 362 }
 363
 364 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 365 int ogl_atotexfilti(char *a,int min){
 366         GLstrcmptestr(a,NEAREST);
 367         GLstrcmptestr(a,LINEAR);
 368         if (min){//mipmaps are valid only for the min filter
 369                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 370                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 371                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 372                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 373         }
 374         Error("unknown/invalid texture filter %s\n",a);
 375 //      return GL_NEAREST;
 376 }
 377 int ogl_testneedmipmaps(int i){
 378         switch (i){
 379                 case GL_NEAREST:
 380                 case GL_LINEAR:
 381                         return 0;
 382                 case GL_NEAREST_MIPMAP_NEAREST:
 383                 case GL_NEAREST_MIPMAP_LINEAR:
 384                 case GL_LINEAR_MIPMAP_NEAREST:
 385                 case GL_LINEAR_MIPMAP_LINEAR:
 386                         return 1;
 387         }
 388         Error("unknown texture filter %x\n",i);
 389 //      return -1;
 390 }
 391
 392
 393 void gr_cmd_texturemode(int argc, char **argv)
 394 {
 395         if (argc < 2)
 396                 return;
 397
 398         if (!stricmp(argv[1], "GL_NEAREST")) {
 399                 GL_texminfilt = GL_NEAREST;
 400                 GL_texmagfilt = GL_NEAREST;
 401         } else if (!stricmp(argv[1], "GL_LINEAR")) {
 402                 GL_texminfilt = GL_LINEAR;
 403                 GL_texmagfilt = GL_LINEAR;
 404         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_NEAREST")) {
 405                 GL_texminfilt = GL_NEAREST_MIPMAP_NEAREST;
 406                 GL_texmagfilt = GL_NEAREST;
 407         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_NEAREST")) {
 408                 GL_texminfilt = GL_LINEAR_MIPMAP_NEAREST;
 409                 GL_texmagfilt = GL_LINEAR;
 410         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_LINEAR")) {
 411                 GL_texminfilt = GL_NEAREST_MIPMAP_LINEAR;
 412                 GL_texmagfilt = GL_NEAREST;
 413         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_LINEAR")) {
 414                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 415                 GL_texmagfilt = GL_LINEAR;
 416         } else
 417                 return;
 418
 419         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 420
 421         ogl_smash_texture_list_internal();
 422 }
 423
 424
 425 #ifdef OGL_RUNTIME_LOAD
 426 #ifdef _WIN32
 427 char *OglLibPath="opengl32.dll";
 428 #endif
 429 #ifdef __unix__
 430 char *OglLibPath="libGL.so";
 431 #endif
 432 #ifdef macintosh
 433 char *OglLibPath = NULL;
 434 #endif
 435
 436 int ogl_rt_loaded=0;
 437 int ogl_init_load_library(void)
 438 {
 439         int retcode=0;
 440         if (!ogl_rt_loaded){
 441                 int t;
 442                 if ((t=FindArg("-gl_library")))
 443                         OglLibPath=Args[t+1];
 444
 445                 retcode = OpenGL_LoadLibrary(true);
 446                 if(retcode)
 447                 {
 448                         mprintf((0,"Opengl loaded ok\n"));
 449
 450                         if(!glEnd)
 451                         {
 452                                 Error("Opengl: Functions not imported\n");
 453                         }
 454                 }else{
 455                         Error("Opengl: error loading %s\n", OglLibPath? OglLibPath : SDL_GetError());
 456                 }
 457                 ogl_rt_loaded=1;
 458         }
 459         return retcode;
 460 }
 461 #endif
 462
 463 int gr_init()
 464 {
 465         int t, glt = 0;
 466
 467         // Only do this function once!
 468         if (gr_installed==1)
 469                 return -1;
 470
 471
 472 #ifdef OGL_RUNTIME_LOAD
 473         ogl_init_load_library();
 474 #endif
 475
 476 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 477         if (FindArg("-gl_voodoo")){
 478                 ogl_voodoohack=1;
 479                 gr_toggle_fullscreen();
 480         }
 481         if (FindArg("-fullscreen"))
 482                 gr_toggle_fullscreen();
 483 #endif
 484         if ((glt=FindArg("-gl_alttexmerge")))
 485                 ogl_alttexmerge=1;
 486         if ((t=FindArg("-gl_stdtexmerge")))
 487                 if (t>=glt)//allow overriding of earlier args
 488                         ogl_alttexmerge=0;
 489
 490         if ((glt = FindArg("-gl_16bittextures")))
 491         {
 492                 ogl_rgba_internalformat = GL_RGB5_A1;
 493                 ogl_rgb_internalformat = GL_RGB5;
 494         }
 495
 496         if ((glt=FindArg("-gl_mipmap"))){
 497                 GL_texmagfilt=GL_LINEAR;
 498                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 499         }
 500         if ((glt=FindArg("-gl_trilinear")))
 501         {
 502                 GL_texmagfilt = GL_LINEAR;
 503                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 504         }
 505         if ((t=FindArg("-gl_simple"))){
 506                 if (t>=glt){//allow overriding of earlier args
 507                         glt=t;
 508                         GL_texmagfilt=GL_NEAREST;
 509                         GL_texminfilt=GL_NEAREST;
 510                 }
 511         }
 512         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 513                 if (t>=glt)//allow overriding of earlier args
 514                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 515         }
 516         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 517                 if (t>=glt)//allow overriding of earlier args
 518                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 519         }
 520         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 521
 522         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 523         {
 524                 GL_texanisofilt=atof(Args[t + 1]);
 525         }
 526
 527         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 528
 529
 530         if ((t=FindArg("-gl_vidmem"))){
 531                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 532         }
 533         if ((t=FindArg("-gl_reticle"))){
 534                 gl_reticle=atoi(Args[t+1]);
 535         }
 536         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 537
 538         ogl_init();//platform specific initialization
 539
 540         ogl_init_texture_list_internal();
 541
 542         MALLOC( grd_curscreen,grs_screen,1 );
 543         memset( grd_curscreen, 0, sizeof(grs_screen));
 544         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 545         grd_curscreen->sc_canvas.cv_color = 0;
 546         grd_curscreen->sc_canvas.cv_drawmode = 0;
 547         grd_curscreen->sc_canvas.cv_font = NULL;
 548         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 549         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 550         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 551
 552         cmd_addcommand("gl_texturemode", gr_cmd_texturemode);
 553
 554         cvar_registervariable(&gr_palette_gamma);
 555
 556         gr_installed = 1;
 557
 558         atexit(gr_close);
 559
 560         return 0;
 561 }
 562
 563 void gr_close()
 564 {
 565 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 566         ogl_brightness_r = ogl_brightness_g = ogl_brightness_b = 0;
 567         ogl_setbrightness_internal();
 568
 569         ogl_close();//platform specific code
 570         if (grd_curscreen){
 571                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 572                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 573                 d_free(grd_curscreen);
 574         }
 575 #ifdef OGL_RUNTIME_LOAD
 576         if (ogl_rt_loaded)
 577                 OpenGL_LoadLibrary(false);
 578 #endif
 579 }
 580 extern int r_upixelc;
 581 void ogl_upixelc(int x, int y, int c){
 582         r_upixelc++;
 583 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 584 //      if(Function_mode != FMODE_GAME){
 585 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 586 //      }else{
 587                 OGL_DISABLE(TEXTURE_2D);
 588                 glPointSize(1.0);
 589                 glBegin(GL_POINTS);
 590 //              glBegin(GL_LINES);
 591 //      ogl_pal=gr_current_pal;
 592                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 593 //      ogl_pal=gr_palette;
 594                 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);
 595 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 596                 glEnd();
 597 //      }
 598 }
 599 void ogl_urect(int left,int top,int right,int bot){
 600         GLfloat xo,yo,xf,yf;
 601         int c=COLOR;
 602
 603         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 604         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 605         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 606         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 607
 608         OGL_DISABLE(TEXTURE_2D);
 609         if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
 610                 glColor3f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c));
 611         else
 612                 glColor4f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
 613         glBegin(GL_QUADS);
 614         glVertex2f(xo,yo);
 615         glVertex2f(xo,yf);
 616         glVertex2f(xf,yf);
 617         glVertex2f(xf,yo);
 618         glEnd();
 619 }
 620 void ogl_ulinec(int left,int top,int right,int bot,int c){
 621         GLfloat xo,yo,xf,yf;
 622
 623         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 624         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 625         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 626         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 627
 628         OGL_DISABLE(TEXTURE_2D);
 629         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 630         glBegin(GL_LINES);
 631         glVertex2f(xo,yo);
 632         glVertex2f(xf,yf);
 633         glEnd();
 634 }
 635
 636
 637 GLfloat last_r=0, last_g=0, last_b=0;
 638 int do_pal_step=0;
 639 void ogl_do_palfx(void){
 640 //      GLfloat r,g,b,a;
 641         OGL_DISABLE(TEXTURE_2D);
 642         if (gr_palette_faded_out){
 643 /*              glEnable(GL_BLEND);
 644                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 645                 glColor3f(0,0,0);
 646 //              r=g=b=0.0;a=1.0;
 647         }else{
 648                 if (do_pal_step){
 649                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 650                         glEnable(GL_BLEND);
 651                         glBlendFunc(GL_ONE,GL_ONE);
 652                         glColor3f(last_r,last_g,last_b);
 653 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 654                 }else
 655                         return;
 656         }
 657
 658
 659         glBegin(GL_QUADS);
 660         glVertex2f(0,0);
 661         glVertex2f(0,1);
 662         glVertex2f(1,1);
 663         glVertex2f(1,0);
 664         glEnd();
 665
 666         glEnable(GL_BLEND);
 667         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 668 }
 669
 670 void gr_palette_clear()
 671 {
 672         gr_palette_faded_out=1;
 673 }
 674
 675
 676 int ogl_brightness_ok = 0;
 677 int ogl_setgammaramp_ok = 1;
 678 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 679 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 680
 681 void gr_palette_step_up(int r, int g, int b)
 682 {
 683         if (gr_palette_faded_out)
 684                 return;
 685
 686         old_b_r = ogl_brightness_r;
 687         old_b_g = ogl_brightness_g;
 688         old_b_b = ogl_brightness_b;
 689
 690         ogl_brightness_r = max(r + gr_palette_gamma.intval, 0);
 691         ogl_brightness_g = max(g + gr_palette_gamma.intval, 0);
 692         ogl_brightness_b = max(b + gr_palette_gamma.intval, 0);
 693
 694         if (ogl_setgammaramp_ok &&
 695             (old_b_r != ogl_brightness_r ||
 696              old_b_g != ogl_brightness_g ||
 697              old_b_b != ogl_brightness_b))
 698                 ogl_brightness_ok = !ogl_setbrightness_internal();
 699
 700         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 701         {
 702                 last_r = ogl_brightness_r / 63.0;
 703                 last_g = ogl_brightness_g / 63.0;
 704                 last_b = ogl_brightness_b / 63.0;
 705
 706                 do_pal_step = (r || g || b || gr_palette_gamma.intval);
 707         }
 708         else
 709         {
 710                 do_pal_step = 0;
 711         }
 712 }
 713
 714
 715 void gr_palette_load( ubyte *pal )
 716 {
 717  int i;//, j;
 718
 719  for (i=0; i<768; i++ ) {
 720      gr_current_pal[i] = pal[i];
 721      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 722  }
 723  //palette = screen->format->palette;
 724
 725  gr_palette_faded_out=0;
 726
 727         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 728
 729  init_computed_colors();
 730
 731         ogl_init_shared_palette();
 732 }
 733
 734
 735
 736 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 737 {
 738         int j;
 739         unsigned char *buf;
 740
 741         if (gr_palette_faded_out) return 0;
 742
 743         if (grd_fades_disabled || !ogl_readpixels_ok) {
 744                 gr_palette_faded_out = 1;
 745                 return 0;
 746         }
 747
 748         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 749         glEnable(GL_BLEND);
 750         glDisable(GL_DEPTH_TEST);
 751
 752         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 753         glReadBuffer(GL_FRONT);
 754         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 755
 756         for (j = 0; j < nsteps; j++) {
 757                 glRasterPos2f(0,0);
 758                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 759
 760                 glColor4f(0.0, 0.0, 0.0, (float)(j) / (nsteps - 1)); // go from 0 to 1
 761                 glBegin(GL_QUADS);
 762                 glVertex2i(0, 0);
 763                 glVertex2i(0, 1);
 764                 glVertex2i(1, 1);
 765                 glVertex2i(1, 0);
 766                 glEnd();
 767
 768                 glFlush();
 769
 770                 timer_delay(f0_1 / 10);
 771         }
 772         d_free(buf);
 773
 774         gr_palette_faded_out=1;
 775         return 0;
 776 }
 777
 778
 779
 780 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 781 {
 782         int j;
 783         unsigned char *buf;
 784
 785         if (!gr_palette_faded_out) return 0;
 786
 787         if (grd_fades_disabled || !ogl_readpixels_ok) {
 788                 gr_palette_faded_out = 0;
 789                 return 0;
 790         }
 791
 792         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 793         glEnable(GL_BLEND);
 794         glDisable(GL_DEPTH_TEST);
 795
 796         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 797         glReadBuffer(GL_FRONT);
 798         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 799
 800         for (j = 0; j < nsteps; j++) {
 801                 glRasterPos2f(0,0);
 802                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 803
 804                 glColor4f(0.0, 0.0, 0.0, (float)(nsteps - 1 - j) / (nsteps - 1)); // go from 1 to 0
 805                 glBegin(GL_QUADS);
 806                 glVertex2i(0, 0);
 807                 glVertex2i(0, 1);
 808                 glVertex2i(1, 1);
 809                 glVertex2i(1, 0);
 810                 glEnd();
 811
 812                 glFlush();
 813
 814                 timer_delay(f0_1 / 10);
 815         }
 816         d_free(buf);
 817
 818         gr_palette_faded_out=0;
 819         return 0;
 820 }
 821
 822
 823
 824 void gr_palette_read(ubyte * pal)
 825 {
 826         int i;
 827         for (i=0; i<768; i++ ) {
 828                 pal[i]=gr_current_pal[i];
 829                 if (pal[i] > 63) pal[i] = 63;
 830         }
 831 }
 832
 833 //writes out an uncompressed RGB .tga file
 834 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 835 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 836         PHYSFS_file *f;
 837
 838         f = PHYSFSX_openWriteBuffered(savename);
 839
 840         if (f) {
 841                 GLubyte    targaMagic[12] = { 0, //no identification field
 842                          0,//no colormap
 843                          2,//RGB image (well, BGR, actually)
 844                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 845                 GLubyte blah;
 846                 int r;
 847                 GLubyte *s;
 848                 int x,y;
 849
 850                 //write .TGA header.
 851                 PHYSFS_write(f, targaMagic, sizeof(targaMagic), 1);
 852                 PHYSFS_writeSLE16(f, w);
 853                 PHYSFS_writeSLE16(f, h);
 854                 PHYSFSX_writeU8(f, 24); // 24 bpp
 855                 PHYSFSX_writeU8(f, 0);  // no attribute bits, origin is lowerleft, no interleave
 856
 857                 s=buf;
 858                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 859                         for (x=0;x<w;x++){
 860                                 blah=s[0];
 861                                 s[0]=s[2];
 862                                 s[2]=blah;
 863                                 s+=3;
 864                         }
 865                 }
 866                 x=0;y=w*h*3;
 867                 while (y > 0)
 868                 {
 869                         r = (int)PHYSFS_write(f, buf + x, 1, y);
 870                         if (r<=0){
 871                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 872                                 break;
 873                         }
 874                         x+=r;y-=r;
 875                 }
 876                 PHYSFS_close(f);
 877         }else{
 878                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 879         }
 880 }
 881 void save_screen_shot(int automap_flag)
 882 {
 883 //      fix t1;
 884         char message[100];
 885         static int savenum=0;
 886         char savename[13];
 887         unsigned char *buf;
 888
 889         if (!ogl_readpixels_ok){
 890                 if (!automap_flag)
 891                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 892                 return;
 893         }
 894
 895         stop_time();
 896
 897 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 898         do
 899         {
 900                 if (savenum == 9999)
 901                         savenum = 0;
 902                 sprintf(savename, "scrn%04d.tga", savenum++);
 903         } while (PHYSFS_exists(savename));
 904
 905         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 906 //end this section addition/change - Victor Rachels
 907
 908         if (automap_flag) {
 909 //      save_font = grd_curcanv->cv_font;
 910 //      gr_set_curfont(GAME_FONT);
 911 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 912 //      gr_get_string_size(message,&w,&h,&aw);
 913 //              modex_print_message(32, 2, message);
 914         } else {
 915                 hud_message(MSGC_GAME_FEEDBACK, "%s", message);
 916         }
 917
 918         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 919         glReadBuffer(GL_FRONT);
 920         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 921         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 922         d_free(buf);
 923
 924         key_flush();
 925         start_time();
 926 }