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 "hudmsg.h"
  31 #include "inferno.h"
  32 #include "text.h"
  33 #include "gr.h"
  34 #include "vid.h"
  35 #include "gamefont.h"
  36 #include "grdef.h"
  37 #include "palette.h"
  38 #include "u_mem.h"
  39 #include "error.h"
  40
  41 #include "inferno.h"
  42 #include "screens.h"
  43 #include "timer.h"
  44 #include "strutil.h"
  45 #include "mono.h"
  46 #include "args.h"
  47 #include "key.h"
  48 #include "physfsx.h"
  49
  50 #define DECLARE_VARS
  51 #include "internal.h"
  52 #if defined(__APPLE__) && defined(__MACH__)
  53 #include <OpenGL/glu.h>
  54 #undef GL_ARB_multitexture // hack!
  55 #else
  56 #include <GL/glu.h>
  57 #endif
  58
  59 int ogl_voodoohack=0;
  60
  61 int vid_installed = 0;
  62
  63
  64 void gr_palette_clear(); // Function prototype for gr_init;
  65 int gl_initialized=0;
  66 int gl_reticle = 0;
  67
  68 int ogl_fullscreen=0;
  69
  70
  71 int vid_check_fullscreen(void)
  72 {
  73         return ogl_fullscreen;
  74 }
  75
  76
  77 static void do_fullscreen(int f)
  78 {
  79         if (ogl_voodoohack)
  80                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  81         else
  82                 ogl_fullscreen=f;
  83         if (gl_initialized){
  84                 ogl_do_fullscreen_internal();
  85         }
  86 }
  87
  88
  89 int vid_toggle_fullscreen(void)
  90 {
  91         do_fullscreen(!ogl_fullscreen);
  92         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  93         return ogl_fullscreen;
  94 }
  95
  96
  97 int vid_toggle_fullscreen_menu(void)
  98 {
  99         unsigned char *buf=NULL;
 100
 101         if (ogl_readpixels_ok){
 102                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 103                 glReadBuffer(GL_FRONT);
 104                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 105         }
 106
 107         do_fullscreen(!ogl_fullscreen);
 108
 109         if (ogl_readpixels_ok){
 110 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 111                 glRasterPos2f(0,0);
 112                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 113                 free(buf);
 114         }
 115         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 116
 117         return ogl_fullscreen;
 118 }
 119
 120 void ogl_init_state(void){
 121         /* select clearing (background) color   */
 122         glClearColor(0.0, 0.0, 0.0, 0.0);
 123         glShadeModel(GL_SMOOTH);
 124
 125         /* initialize viewing values */
 126         glMatrixMode(GL_PROJECTION);
 127         glLoadIdentity();
 128         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 129         glScalef(1.0, -1.0, 1.0);
 130         glTranslatef(0.0, -1.0, 0.0);
 131         gr_palette_step_up(0,0,0);//in case its left over from in game
 132 }
 133
 134 int last_screen_mode=-1;
 135
 136 void ogl_set_screen_mode(void){
 137         if (last_screen_mode==Screen_mode)
 138                 return;
 139         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 140 //      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);
 141         if (Screen_mode==SCREEN_GAME){
 142                 glDrawBuffer(GL_BACK);
 143         }else{
 144                 glClearColor(0.0, 0.0, 0.0, 0.0);
 145                 glDrawBuffer(GL_FRONT);
 146                 glClear(GL_COLOR_BUFFER_BIT);
 147                 glMatrixMode(GL_PROJECTION);
 148                 glLoadIdentity();//clear matrix
 149                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 150                 glMatrixMode(GL_MODELVIEW);
 151                 glLoadIdentity();//clear matrix
 152                 glEnable(GL_BLEND);
 153                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 154         }
 155         last_screen_mode=Screen_mode;
 156 }
 157
 158 void vid_update()
 159 {
 160         if (gl_initialized){
 161
 162                 if(Screen_mode != SCREEN_GAME){
 163                         glFlush();
 164                 }
 165         }
 166 }
 167
 168 const char *gl_vendor, *gl_renderer, *gl_version, *gl_extensions;
 169
 170 void ogl_get_verinfo(void)
 171 {
 172         long t, sgi_max_textures = -1;
 173         GLint arb_max_textures = -1;
 174 #ifdef GL_NV_register_combiners
 175         long nv_register_combiners = -1;
 176 #endif
 177         float anisotropic_max = 0;
 178
 179         gl_vendor = (const char *) glGetString (GL_VENDOR);
 180         gl_renderer = (const char *) glGetString (GL_RENDERER);
 181         gl_version = (const char *) glGetString (GL_VERSION);
 182         gl_extensions = (const char *) glGetString (GL_EXTENSIONS);
 183
 184         con_printf(CON_VERBOSE, "OpenGL: vendor: %s\nOpenGL: renderer: %s\nOpenGL: version: %s\n",gl_vendor,gl_renderer,gl_version);
 185
 186         ogl_intensity4_ok = 1;
 187         ogl_luminance4_alpha4_ok = 1;
 188         ogl_rgba2_ok = 1;
 189         ogl_gettexlevelparam_ok = 1;
 190         ogl_setgammaramp_ok = 1;
 191
 192 #ifdef WGL_VIDEO
 193         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 194         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 195         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 196         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 197         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 198         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 199         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 200         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 201         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 202 #endif
 203
 204 #ifdef GL_ARB_multitexture
 205         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 206         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 207 #endif
 208 #ifdef GL_SGIS_multitexture
 209         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 210         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 211 #endif
 212         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 213 #ifdef GL_NV_register_combiners
 214         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 215 #endif
 216
 217         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 218         if (ogl_ext_texture_filter_anisotropic_ok)
 219                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 220
 221 #ifdef GL_EXT_paletted_texture
 222         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 223         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 224 #endif
 225         //add driver specific hacks here.  whee.
 226         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){
 227                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 228                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 229                 ogl_gettexlevelparam_ok=0;//returns random data..
 230         }
 231         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 232                 //displays garbage. reported by
 233                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 234                 //  orulz (Matrox G200)
 235                 ogl_intensity4_ok=0;
 236         }
 237 #ifdef macintosh
 238         if (stricmp(gl_renderer,"3dfx Voodoo 3")==0){ // strangely, includes Voodoo 2
 239                 ogl_gettexlevelparam_ok=0; // Always returns 0
 240         }
 241 #endif
 242
 243         //allow overriding of stuff.
 244 #ifdef GL_ARB_multitexture
 245         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 246                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 247         }
 248         if (ogl_arb_multitexture_ok)
 249                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 250 #endif
 251 #ifdef GL_SGIS_multitexture
 252         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 253                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 254         }
 255         if (ogl_sgis_multitexture_ok)
 256                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 257 #endif
 258 #ifdef GL_NV_register_combiners
 259         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 260         {
 261                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 262         }
 263         if (ogl_nv_register_combiners_ok)
 264                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 265 #endif
 266 #ifdef GL_EXT_paletted_texture
 267         if ((t = FindArg("-gl_paletted_texture_ok")))
 268         {
 269                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 270         }
 271         if ((t = FindArg("-gl_shared_palette_ok")))
 272         {
 273                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 274         }
 275         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 276         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);
 277 #endif
 278         if ((t=FindArg("-gl_intensity4_ok"))){
 279                 ogl_intensity4_ok=atoi(Args[t+1]);
 280         }
 281         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 282                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 283         }
 284         if ((t=FindArg("-gl_rgba2_ok"))){
 285                 ogl_rgba2_ok=atoi(Args[t+1]);
 286         }
 287         if ((t=FindArg("-gl_readpixels_ok"))){
 288                 ogl_readpixels_ok=atoi(Args[t+1]);
 289         }
 290         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 291                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 292         }
 293         if ((t=FindArg("-gl_setgammaramp_ok")))
 294         {
 295                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 296         }
 297
 298         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);
 299 #ifdef GL_NV_register_combiners
 300         con_printf(CON_DEBUG, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 301 #endif
 302         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);
 303 }
 304
 305
 306 int vid_check_mode(uint32_t mode)
 307 {
 308         int w, h;
 309
 310         w = SM_W(mode);
 311         h = SM_H(mode);
 312         return ogl_check_mode(w, h); // platform specific code
 313 }
 314
 315
 316 uint32_t Vid_current_mode;
 317
 318
 319 int vid_set_mode(uint32_t mode)
 320 {
 321         short w, h;
 322
 323 #ifdef NOGRAPH
 324 return 0;
 325 #endif
 326 //      mode=0;
 327         if (mode<=0)
 328                 return 0;
 329
 330         if (mode == Vid_current_mode)
 331                 return 0;
 332
 333         w=SM_W(mode);
 334         h=SM_H(mode);
 335         Vid_current_mode = mode;
 336
 337         //if (screen != NULL) gr_palette_clear();
 338
 339 //      ogl_init_state();
 340
 341         gr_init_screen(BM_OGL, w, h, 0, 0, w, NULL);
 342
 343         //gr_enable_default_palette_loading();
 344
 345         ogl_init_window(w,h);//platform specific code
 346
 347         ogl_get_verinfo();
 348
 349         OGL_VIEWPORT(0,0,w,h);
 350
 351         ogl_set_screen_mode();
 352
 353 //      gamefont_choose_game_font(w,h);
 354
 355         return 0;
 356 }
 357
 358 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 359 int ogl_atotexfilti(char *a,int min){
 360         GLstrcmptestr(a,NEAREST);
 361         GLstrcmptestr(a,LINEAR);
 362         if (min){//mipmaps are valid only for the min filter
 363                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 364                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 365                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 366                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 367         }
 368         Error("unknown/invalid texture filter %s\n",a);
 369 //      return GL_NEAREST;
 370 }
 371 int ogl_testneedmipmaps(int i){
 372         switch (i){
 373                 case GL_NEAREST:
 374                 case GL_LINEAR:
 375                         return 0;
 376                 case GL_NEAREST_MIPMAP_NEAREST:
 377                 case GL_NEAREST_MIPMAP_LINEAR:
 378                 case GL_LINEAR_MIPMAP_NEAREST:
 379                 case GL_LINEAR_MIPMAP_LINEAR:
 380                         return 1;
 381         }
 382         Error("unknown texture filter %x\n",i);
 383 //      return -1;
 384 }
 385
 386
 387 void ogl_cmd_texturemode(int argc, char **argv)
 388 {
 389         if (argc < 2)
 390                 return;
 391
 392         if (!stricmp(argv[1], "GL_NEAREST")) {
 393                 GL_texminfilt = GL_NEAREST;
 394                 GL_texmagfilt = GL_NEAREST;
 395         } else if (!stricmp(argv[1], "GL_LINEAR")) {
 396                 GL_texminfilt = GL_LINEAR;
 397                 GL_texmagfilt = GL_LINEAR;
 398         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_NEAREST")) {
 399                 GL_texminfilt = GL_NEAREST_MIPMAP_NEAREST;
 400                 GL_texmagfilt = GL_NEAREST;
 401         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_NEAREST")) {
 402                 GL_texminfilt = GL_LINEAR_MIPMAP_NEAREST;
 403                 GL_texmagfilt = GL_LINEAR;
 404         } else if (!stricmp(argv[1], "GL_NEAREST_MIPMAP_LINEAR")) {
 405                 GL_texminfilt = GL_NEAREST_MIPMAP_LINEAR;
 406                 GL_texmagfilt = GL_NEAREST;
 407         } else if (!stricmp(argv[1], "GL_LINEAR_MIPMAP_LINEAR")) {
 408                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 409                 GL_texmagfilt = GL_LINEAR;
 410         } else
 411                 return;
 412
 413         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 414
 415         ogl_smash_texture_list_internal();
 416 }
 417
 418
 419 #ifdef OGL_RUNTIME_LOAD
 420 #ifdef _WIN32
 421 char *OglLibPath="opengl32.dll";
 422 #endif
 423 #ifdef __unix__
 424 char *OglLibPath="libGL.so";
 425 #endif
 426 #ifdef macintosh
 427 char *OglLibPath = NULL;
 428 #endif
 429
 430 int ogl_rt_loaded=0;
 431 int ogl_init_load_library(void)
 432 {
 433         int retcode=0;
 434         if (!ogl_rt_loaded){
 435                 int t;
 436                 if ((t=FindArg("-gl_library")))
 437                         OglLibPath=Args[t+1];
 438
 439                 retcode = OpenGL_LoadLibrary(true);
 440                 if(retcode)
 441                 {
 442                         mprintf((0,"Opengl loaded ok\n"));
 443
 444                         if(!glEnd)
 445                         {
 446                                 Error("Opengl: Functions not imported\n");
 447                         }
 448                 }else{
 449                         Error("Opengl: error loading %s\n", OglLibPath? OglLibPath : SDL_GetError());
 450                 }
 451                 ogl_rt_loaded=1;
 452         }
 453         return retcode;
 454 }
 455 #endif
 456
 457
 458 int vid_init(void)
 459 {
 460         int t, glt = 0;
 461
 462         // Only do this function once!
 463         if (vid_installed == 1)
 464                 return -1;
 465
 466
 467 #ifdef OGL_RUNTIME_LOAD
 468         ogl_init_load_library();
 469 #endif
 470
 471 #ifdef VID_SUPPORTS_FULLSCREEN_TOGGLE
 472         if (FindArg("-gl_voodoo")){
 473                 ogl_voodoohack=1;
 474                 vid_toggle_fullscreen();
 475         }
 476         if (FindArg("-fullscreen"))
 477                 vid_toggle_fullscreen();
 478 #endif
 479         if ((glt=FindArg("-gl_alttexmerge")))
 480                 ogl_alttexmerge=1;
 481         if ((t=FindArg("-gl_stdtexmerge")))
 482                 if (t>=glt)//allow overriding of earlier args
 483                         ogl_alttexmerge=0;
 484
 485         if ((glt = FindArg("-gl_16bittextures")))
 486         {
 487                 ogl_rgba_internalformat = GL_RGB5_A1;
 488                 ogl_rgb_internalformat = GL_RGB5;
 489         }
 490
 491         if ((glt=FindArg("-gl_mipmap"))){
 492                 GL_texmagfilt=GL_LINEAR;
 493                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 494         }
 495         if ((glt=FindArg("-gl_trilinear")))
 496         {
 497                 GL_texmagfilt = GL_LINEAR;
 498                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 499         }
 500         if ((t=FindArg("-gl_simple"))){
 501                 if (t>=glt){//allow overriding of earlier args
 502                         glt=t;
 503                         GL_texmagfilt=GL_NEAREST;
 504                         GL_texminfilt=GL_NEAREST;
 505                 }
 506         }
 507         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 508                 if (t>=glt)//allow overriding of earlier args
 509                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 510         }
 511         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 512                 if (t>=glt)//allow overriding of earlier args
 513                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 514         }
 515         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 516
 517         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 518         {
 519                 GL_texanisofilt=atof(Args[t + 1]);
 520         }
 521
 522         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 523
 524
 525         if ((t=FindArg("-gl_vidmem"))){
 526                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 527         }
 528         if ((t=FindArg("-gl_reticle"))){
 529                 gl_reticle=atoi(Args[t+1]);
 530         }
 531         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 532
 533         ogl_init();//platform specific initialization
 534
 535         ogl_init_texture_list_internal();
 536
 537         cmd_addcommand("gl_texturemode", ogl_cmd_texturemode);
 538
 539         vid_installed = 1;
 540
 541         atexit(vid_close);
 542
 543         return 0;
 544 }
 545
 546
 547 void vid_close(void)
 548 {
 549 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 550         ogl_brightness_r = ogl_brightness_g = ogl_brightness_b = 0;
 551         ogl_setbrightness_internal();
 552
 553         ogl_close();//platform specific code
 554
 555 #ifdef OGL_RUNTIME_LOAD
 556         if (ogl_rt_loaded)
 557                 OpenGL_LoadLibrary(false);
 558 #endif
 559 }
 560 extern int r_upixelc;
 561 void ogl_upixelc(int x, int y, int c){
 562         r_upixelc++;
 563 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 564 //      if(Function_mode != FMODE_GAME){
 565 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 566 //      }else{
 567                 OGL_DISABLE(TEXTURE_2D);
 568                 glPointSize(1.0);
 569                 glBegin(GL_POINTS);
 570 //              glBegin(GL_LINES);
 571 //      ogl_pal=gr_current_pal;
 572                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 573 //      ogl_pal=gr_palette;
 574                 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);
 575 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 576                 glEnd();
 577 //      }
 578 }
 579 void ogl_urect(int left,int top,int right,int bot){
 580         GLfloat xo,yo,xf,yf;
 581         int c=COLOR;
 582
 583         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 584         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 585         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 586         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 587
 588         OGL_DISABLE(TEXTURE_2D);
 589         if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
 590                 glColor3f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c));
 591         else
 592                 glColor4f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
 593         glBegin(GL_QUADS);
 594         glVertex2f(xo,yo);
 595         glVertex2f(xo,yf);
 596         glVertex2f(xf,yf);
 597         glVertex2f(xf,yo);
 598         glEnd();
 599 }
 600 void ogl_ulinec(int left,int top,int right,int bot,int c){
 601         GLfloat xo,yo,xf,yf;
 602
 603         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 604         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 605         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 606         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 607
 608         OGL_DISABLE(TEXTURE_2D);
 609         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 610         glBegin(GL_LINES);
 611         glVertex2f(xo,yo);
 612         glVertex2f(xf,yf);
 613         glEnd();
 614 }
 615
 616
 617 GLfloat last_r=0, last_g=0, last_b=0;
 618 int do_pal_step=0;
 619 void ogl_do_palfx(void){
 620 //      GLfloat r,g,b,a;
 621         OGL_DISABLE(TEXTURE_2D);
 622         if (gr_palette_faded_out){
 623 /*              glEnable(GL_BLEND);
 624                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 625                 glColor3f(0,0,0);
 626 //              r=g=b=0.0;a=1.0;
 627         }else{
 628                 if (do_pal_step){
 629                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 630                         glEnable(GL_BLEND);
 631                         glBlendFunc(GL_ONE,GL_ONE);
 632                         glColor3f(last_r,last_g,last_b);
 633 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 634                 }else
 635                         return;
 636         }
 637
 638
 639         glBegin(GL_QUADS);
 640         glVertex2f(0,0);
 641         glVertex2f(0,1);
 642         glVertex2f(1,1);
 643         glVertex2f(1,0);
 644         glEnd();
 645
 646         glEnable(GL_BLEND);
 647         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 648 }
 649
 650 void gr_palette_clear()
 651 {
 652         gr_palette_faded_out=1;
 653 }
 654
 655
 656 int ogl_brightness_ok = 0;
 657 int ogl_setgammaramp_ok = 1;
 658 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 659 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 660
 661 void gr_palette_step_up(int r, int g, int b)
 662 {
 663         if (gr_palette_faded_out)
 664                 return;
 665
 666         old_b_r = ogl_brightness_r;
 667         old_b_g = ogl_brightness_g;
 668         old_b_b = ogl_brightness_b;
 669
 670         ogl_brightness_r = max(r + gr_palette_gamma.intval, 0);
 671         ogl_brightness_g = max(g + gr_palette_gamma.intval, 0);
 672         ogl_brightness_b = max(b + gr_palette_gamma.intval, 0);
 673
 674         if (ogl_setgammaramp_ok &&
 675             (old_b_r != ogl_brightness_r ||
 676              old_b_g != ogl_brightness_g ||
 677              old_b_b != ogl_brightness_b))
 678                 ogl_brightness_ok = !ogl_setbrightness_internal();
 679
 680         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 681         {
 682                 last_r = ogl_brightness_r / 63.0;
 683                 last_g = ogl_brightness_g / 63.0;
 684                 last_b = ogl_brightness_b / 63.0;
 685
 686                 do_pal_step = (r || g || b || gr_palette_gamma.intval);
 687         }
 688         else
 689         {
 690                 do_pal_step = 0;
 691         }
 692 }
 693
 694
 695 void gr_palette_load( ubyte *pal )
 696 {
 697  int i;//, j;
 698
 699  for (i=0; i<768; i++ ) {
 700      gr_current_pal[i] = pal[i];
 701      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 702  }
 703  //palette = screen->format->palette;
 704
 705  gr_palette_faded_out=0;
 706
 707         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 708
 709  init_computed_colors();
 710
 711         ogl_init_shared_palette();
 712 }
 713
 714
 715
 716 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 717 {
 718         int j;
 719         unsigned char *buf;
 720
 721         if (gr_palette_faded_out) return 0;
 722
 723         if (grd_fades_disabled || !ogl_readpixels_ok) {
 724                 gr_palette_faded_out = 1;
 725                 return 0;
 726         }
 727
 728         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 729         glEnable(GL_BLEND);
 730         glDisable(GL_DEPTH_TEST);
 731
 732         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 733         glReadBuffer(GL_FRONT);
 734         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 735
 736         for (j = 0; j < nsteps; j++) {
 737                 glRasterPos2f(0,0);
 738                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 739
 740                 glColor4f(0.0, 0.0, 0.0, (float)(j) / (nsteps - 1)); // go from 0 to 1
 741                 glBegin(GL_QUADS);
 742                 glVertex2i(0, 0);
 743                 glVertex2i(0, 1);
 744                 glVertex2i(1, 1);
 745                 glVertex2i(1, 0);
 746                 glEnd();
 747
 748                 glFlush();
 749
 750                 timer_delay(f0_1 / 10);
 751         }
 752         d_free(buf);
 753
 754         gr_palette_faded_out=1;
 755         return 0;
 756 }
 757
 758
 759
 760 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 761 {
 762         int j;
 763         unsigned char *buf;
 764
 765         if (!gr_palette_faded_out) return 0;
 766
 767         if (grd_fades_disabled || !ogl_readpixels_ok) {
 768                 gr_palette_faded_out = 0;
 769                 return 0;
 770         }
 771
 772         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 773         glEnable(GL_BLEND);
 774         glDisable(GL_DEPTH_TEST);
 775
 776         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 777         glReadBuffer(GL_FRONT);
 778         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 779
 780         for (j = 0; j < nsteps; j++) {
 781                 glRasterPos2f(0,0);
 782                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 783
 784                 glColor4f(0.0, 0.0, 0.0, (float)(nsteps - 1 - j) / (nsteps - 1)); // go from 1 to 0
 785                 glBegin(GL_QUADS);
 786                 glVertex2i(0, 0);
 787                 glVertex2i(0, 1);
 788                 glVertex2i(1, 1);
 789                 glVertex2i(1, 0);
 790                 glEnd();
 791
 792                 glFlush();
 793
 794                 timer_delay(f0_1 / 10);
 795         }
 796         d_free(buf);
 797
 798         gr_palette_faded_out=0;
 799         return 0;
 800 }
 801
 802
 803
 804 void gr_palette_read(ubyte * pal)
 805 {
 806         int i;
 807         for (i=0; i<768; i++ ) {
 808                 pal[i]=gr_current_pal[i];
 809                 if (pal[i] > 63) pal[i] = 63;
 810         }
 811 }
 812
 813 //writes out an uncompressed RGB .tga file
 814 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 815 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 816         PHYSFS_file *f;
 817
 818         f = PHYSFSX_openWriteBuffered(savename);
 819
 820         if (f) {
 821                 GLubyte    targaMagic[12] = { 0, //no identification field
 822                          0,//no colormap
 823                          2,//RGB image (well, BGR, actually)
 824                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 825                 GLubyte blah;
 826                 int r;
 827                 GLubyte *s;
 828                 int x,y;
 829
 830                 //write .TGA header.
 831                 PHYSFS_write(f, targaMagic, sizeof(targaMagic), 1);
 832                 PHYSFS_writeSLE16(f, w);
 833                 PHYSFS_writeSLE16(f, h);
 834                 PHYSFSX_writeU8(f, 24); // 24 bpp
 835                 PHYSFSX_writeU8(f, 0);  // no attribute bits, origin is lowerleft, no interleave
 836
 837                 s=buf;
 838                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 839                         for (x=0;x<w;x++){
 840                                 blah=s[0];
 841                                 s[0]=s[2];
 842                                 s[2]=blah;
 843                                 s+=3;
 844                         }
 845                 }
 846                 x=0;y=w*h*3;
 847                 while (y > 0)
 848                 {
 849                         r = (int)PHYSFS_write(f, buf + x, 1, y);
 850                         if (r<=0){
 851                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 852                                 break;
 853                         }
 854                         x+=r;y-=r;
 855                 }
 856                 PHYSFS_close(f);
 857         }else{
 858                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 859         }
 860 }
 861 void save_screen_shot(int automap_flag)
 862 {
 863 //      fix t1;
 864         char message[100];
 865         static int savenum=0;
 866         char savename[13];
 867         unsigned char *buf;
 868
 869         if (!ogl_readpixels_ok){
 870                 if (!automap_flag)
 871                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 872                 return;
 873         }
 874
 875         stop_time();
 876
 877 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 878         do
 879         {
 880                 if (savenum == 9999)
 881                         savenum = 0;
 882                 sprintf(savename, "scrn%04d.tga", savenum++);
 883         } while (PHYSFS_exists(savename));
 884
 885         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 886 //end this section addition/change - Victor Rachels
 887
 888         if (automap_flag) {
 889 //      save_font = grd_curcanv->cv_font;
 890 //      gr_set_curfont(GAME_FONT);
 891 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 892 //      gr_get_string_size(message,&w,&h,&aw);
 893 //              modex_print_message(32, 2, message);
 894         } else {
 895                 hud_message(MSGC_GAME_FEEDBACK, "%s", message);
 896         }
 897
 898         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 899         glReadBuffer(GL_FRONT);
 900         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 901         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 902         d_free(buf);
 903
 904         key_flush();
 905         start_time();
 906 }