arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.30 2004-05-22 21:55:29 btb Exp $ */
   2 /*
   3  *
   4  * OGL video functions. - Added 9/15/99 Matthew Mueller
   5  *
   6  *
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <conf.h>
  11 #endif
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #ifdef _MSC_VER
  17 #include <windows.h>
  18 #endif
  19
  20 #if defined(__APPLE__) && defined(__MACH__)
  21 //#include <OpenGL/gl.h>
  22 #else
  23 //#include <GL/gl.h>
  24 #endif
  25 #ifndef _MSC_VER
  26 #include <unistd.h>
  27 #endif
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fcntl.h>
  31 #include <errno.h>
  32
  33 #include "hudmsg.h"
  34 #include "game.h"
  35 #include "text.h"
  36 #include "gr.h"
  37 #include "gamefont.h"
  38 #include "grdef.h"
  39 #include "palette.h"
  40 #include "u_mem.h"
  41 #include "error.h"
  42
  43 #include "inferno.h"
  44 #include "screens.h"
  45
  46 #include "strutil.h"
  47 #include "mono.h"
  48 #include "args.h"
  49 #include "key.h"
  50
  51 #define DECLARE_VARS
  52 #include "internal.h"
  53 #if defined(__APPLE__) && defined(__MACH__)
  54 #include <OpenGL/glu.h>
  55 #undef GL_ARB_multitexture // hack!
  56 #else
  57 #include <GL/glu.h>
  58 #endif
  59
  60 int ogl_voodoohack=0;
  61
  62 int gr_installed = 0;
  63
  64
  65 void gr_palette_clear(); // Function prototype for gr_init;
  66 int gl_initialized=0;
  67 int gl_reticle = 0;
  68
  69 int ogl_fullscreen=0;
  70
  71 int gr_check_fullscreen(void){
  72         return ogl_fullscreen;
  73 }
  74
  75 void gr_do_fullscreen(int f){
  76         if (ogl_voodoohack)
  77                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  78         else
  79                 ogl_fullscreen=f;
  80         if (gl_initialized){
  81                 ogl_do_fullscreen_internal();
  82         }
  83 }
  84
  85 int gr_toggle_fullscreen(void){
  86         gr_do_fullscreen(!ogl_fullscreen);
  87         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  88         return ogl_fullscreen;
  89 }
  90
  91 int arch_toggle_fullscreen_menu(void){
  92         unsigned char *buf=NULL;
  93
  94         if (ogl_readpixels_ok){
  95                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  96                 glReadBuffer(GL_FRONT);
  97                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  98         }
  99
 100         gr_do_fullscreen(!ogl_fullscreen);
 101
 102         if (ogl_readpixels_ok){
 103 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 104                 glRasterPos2f(0,0);
 105                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 106                 free(buf);
 107         }
 108         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 109
 110         return ogl_fullscreen;
 111 }
 112
 113 void ogl_init_state(void){
 114         /* select clearing (background) color   */
 115         glClearColor(0.0, 0.0, 0.0, 0.0);
 116         glShadeModel(GL_SMOOTH);
 117
 118         /* initialize viewing values */
 119         glMatrixMode(GL_PROJECTION);
 120         glLoadIdentity();
 121         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 122         glScalef(1.0, -1.0, 1.0);
 123         glTranslatef(0.0, -1.0, 0.0);
 124         gr_palette_step_up(0,0,0);//in case its left over from in game
 125 }
 126
 127 int last_screen_mode=-1;
 128
 129 void ogl_set_screen_mode(void){
 130         if (last_screen_mode==Screen_mode)
 131                 return;
 132         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 133 //      OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,grd_curcanv->cv_bitmap.bm_w,grd_curcanv->cv_bitmap.bm_h);
 134         if (Screen_mode==SCREEN_GAME){
 135                 glDrawBuffer(GL_BACK);
 136         }else{
 137                 glClearColor(0.0, 0.0, 0.0, 0.0);
 138                 glDrawBuffer(GL_FRONT);
 139                 glClear(GL_COLOR_BUFFER_BIT);
 140                 glMatrixMode(GL_PROJECTION);
 141                 glLoadIdentity();//clear matrix
 142                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 143                 glMatrixMode(GL_MODELVIEW);
 144                 glLoadIdentity();//clear matrix
 145                 glEnable(GL_BLEND);
 146                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 147         }
 148         last_screen_mode=Screen_mode;
 149 }
 150
 151 void gr_update()
 152 {
 153         if (gl_initialized){
 154
 155                 if(Screen_mode != SCREEN_GAME){
 156                         glFlush();
 157                 }
 158         }
 159 }
 160
 161 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 162
 163 void ogl_get_verinfo(void)
 164 {
 165         int t, arb_max_textures = -1, sgi_max_textures = -1, nv_register_combiners = -1;
 166         float anisotropic_max = 0;
 167
 168         gl_vendor=glGetString(GL_VENDOR);
 169         gl_renderer=glGetString(GL_RENDERER);
 170         gl_version=glGetString(GL_VERSION);
 171         gl_extensions=glGetString(GL_EXTENSIONS);
 172
 173         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 174
 175         ogl_intensity4_ok = 1;
 176         ogl_luminance4_alpha4_ok = 1;
 177         ogl_rgba2_ok = 1;
 178         ogl_gettexlevelparam_ok = 1;
 179         ogl_setgammaramp_ok = 1;
 180
 181 #ifdef WGL_VIDEO
 182         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 183         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 184         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 185         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 186         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 187         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 188         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 189         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 190         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 191 #endif
 192
 193 #ifdef GL_ARB_multitexture
 194         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 195         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 196 #endif
 197 #ifdef GL_SGIS_multitexture
 198         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 199         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 200 #endif
 201         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 202 #ifdef GL_NV_register_combiners
 203         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 204 #endif
 205
 206         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 207         if (ogl_ext_texture_filter_anisotropic_ok)
 208                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 209
 210 #ifdef GL_EXT_paletted_texture
 211         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 212         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 213 #endif
 214         //add driver specific hacks here.  whee.
 215         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){
 216                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 217                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 218                 ogl_gettexlevelparam_ok=0;//returns random data..
 219         }
 220         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 221                 //displays garbage. reported by
 222                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 223                 //  orulz (Matrox G200)
 224                 ogl_intensity4_ok=0;
 225         }
 226
 227         //allow overriding of stuff.
 228 #ifdef GL_ARB_multitexture
 229         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 230                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 231         }
 232         if (ogl_arb_multitexture_ok)
 233                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 234 #endif
 235 #ifdef GL_SGIS_multitexture
 236         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 237                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 238         }
 239         if (ogl_sgis_multitexture_ok)
 240                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 241 #endif
 242 #ifdef GL_NV_register_combiners
 243         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 244         {
 245                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 246         }
 247         if (ogl_nv_register_combiners_ok)
 248                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 249 #endif
 250 #ifdef GL_EXT_paletted_texture
 251         if ((t = FindArg("-gl_paletted_texture_ok")))
 252         {
 253                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 254         }
 255         if ((t = FindArg("-gl_shared_palette_ok")))
 256         {
 257                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 258         }
 259         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 260         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);
 261 #endif
 262         if ((t=FindArg("-gl_intensity4_ok"))){
 263                 ogl_intensity4_ok=atoi(Args[t+1]);
 264         }
 265         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 266                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 267         }
 268         if ((t=FindArg("-gl_rgba2_ok"))){
 269                 ogl_rgba2_ok=atoi(Args[t+1]);
 270         }
 271         if ((t=FindArg("-gl_readpixels_ok"))){
 272                 ogl_readpixels_ok=atoi(Args[t+1]);
 273         }
 274         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 275                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 276         }
 277         if ((t=FindArg("-gl_setgammaramp_ok")))
 278         {
 279                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 280         }
 281
 282         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i(%i units) gl_sgis_multitexture:%i(%i units) gl_nv_texture_env_combine4:%i gl_nv_register_combiners:%i(%i stages)\n", ogl_arb_multitexture_ok, arb_max_textures, ogl_sgis_multitexture_ok, sgi_max_textures, ogl_nv_texture_env_combine4_ok, 0/*ogl_nv_register_combiners_ok*/, nv_register_combiners);
 283         con_printf(CON_VERBOSE, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i gl_setgammaramp_ok:%i gl_ext_texture_filter_anisotropic:%i(%f max)\n", ogl_intensity4_ok, ogl_luminance4_alpha4_ok, ogl_rgba2_ok, ogl_readpixels_ok, ogl_gettexlevelparam_ok, ogl_setgammaramp_ok, ogl_ext_texture_filter_anisotropic_ok, anisotropic_max);
 284 }
 285
 286
 287 int gr_check_mode(u_int32_t mode)
 288 {
 289         int w, h;
 290
 291         w = SM_W(mode);
 292         h = SM_H(mode);
 293         return ogl_check_mode(w, h); // platform specific code
 294 }
 295
 296
 297 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 298
 299 int gr_set_mode(u_int32_t mode)
 300 {
 301         unsigned int w,h;
 302         char *gr_bm_data;
 303
 304 #ifdef NOGRAPH
 305 return 0;
 306 #endif
 307 //      mode=0;
 308         if (mode<=0)
 309                 return 0;
 310
 311         w=SM_W(mode);
 312         h=SM_H(mode);
 313         VGA_current_mode = mode;
 314
 315         //if (screen != NULL) gr_palette_clear();
 316
 317 //      ogl_init_state();
 318
 319         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 320         memset( grd_curscreen, 0, sizeof(grs_screen));
 321         grd_curscreen->sc_mode = mode;
 322         grd_curscreen->sc_w = w;
 323         grd_curscreen->sc_h = h;
 324         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 325         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 326         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 327         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 328         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 329         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 330         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 331         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 332         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 333 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 334         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 335         gr_set_current_canvas(NULL);
 336         //gr_enable_default_palette_loading();
 337
 338         ogl_init_window(w,h);//platform specific code
 339
 340         ogl_get_verinfo();
 341
 342         OGL_VIEWPORT(0,0,w,h);
 343
 344         ogl_set_screen_mode();
 345
 346 //      gamefont_choose_game_font(w,h);
 347
 348         return 0;
 349 }
 350
 351 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 352 int ogl_atotexfilti(char *a,int min){
 353         GLstrcmptestr(a,NEAREST);
 354         GLstrcmptestr(a,LINEAR);
 355         if (min){//mipmaps are valid only for the min filter
 356                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 357                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 358                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 359                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 360         }
 361         Error("unknown/invalid texture filter %s\n",a);
 362 //      return GL_NEAREST;
 363 }
 364 int ogl_testneedmipmaps(int i){
 365         switch (i){
 366                 case GL_NEAREST:
 367                 case GL_LINEAR:
 368                         return 0;
 369                 case GL_NEAREST_MIPMAP_NEAREST:
 370                 case GL_NEAREST_MIPMAP_LINEAR:
 371                 case GL_LINEAR_MIPMAP_NEAREST:
 372                 case GL_LINEAR_MIPMAP_LINEAR:
 373                         return 1;
 374         }
 375         Error("unknown texture filter %x\n",i);
 376 //      return -1;
 377 }
 378 #ifdef OGL_RUNTIME_LOAD
 379 #ifdef _WIN32
 380 char *OglLibPath="opengl32.dll";
 381 #endif
 382 #ifdef __unix__
 383 char *OglLibPath="libGL.so";
 384 #endif
 385
 386 int ogl_rt_loaded=0;
 387 int ogl_init_load_library(void)
 388 {
 389         int retcode=0;
 390         if (!ogl_rt_loaded){
 391                 int t;
 392                 if ((t=FindArg("-gl_library")))
 393                         OglLibPath=Args[t+1];
 394
 395                 retcode = OpenGL_LoadLibrary(true);
 396                 if(retcode)
 397                 {
 398                         mprintf((0,"Opengl loaded ok\n"));
 399
 400                         if(!glEnd)
 401                         {
 402                                 Error("Opengl: Functions not imported\n");
 403                         }
 404                 }else{
 405                         Error("Opengl: error loading %s\n",OglLibPath);
 406                 }
 407                 ogl_rt_loaded=1;
 408         }
 409         return retcode;
 410 }
 411 #endif
 412
 413 int gr_init()
 414 {
 415         int mode = SM(640,480);
 416         int retcode, t, glt = 0;
 417
 418         // Only do this function once!
 419         if (gr_installed==1)
 420                 return -1;
 421
 422
 423 #ifdef OGL_RUNTIME_LOAD
 424         ogl_init_load_library();
 425 #endif
 426
 427 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 428         if (FindArg("-gl_voodoo")){
 429                 ogl_voodoohack=1;
 430                 gr_toggle_fullscreen();
 431         }
 432         if (FindArg("-fullscreen"))
 433                 gr_toggle_fullscreen();
 434 #endif
 435         if ((glt=FindArg("-gl_alttexmerge")))
 436                 ogl_alttexmerge=1;
 437         if ((t=FindArg("-gl_stdtexmerge")))
 438                 if (t>=glt)//allow overriding of earlier args
 439                         ogl_alttexmerge=0;
 440
 441         if ((glt = FindArg("-gl_16bittextures")))
 442         {
 443                 ogl_rgba_internalformat = GL_RGB5_A1;
 444                 ogl_rgb_internalformat = GL_RGB5;
 445         }
 446
 447         if ((glt=FindArg("-gl_mipmap"))){
 448                 GL_texmagfilt=GL_LINEAR;
 449                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 450         }
 451         if ((glt=FindArg("-gl_trilinear")))
 452         {
 453                 GL_texmagfilt = GL_LINEAR;
 454                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 455         }
 456         if ((t=FindArg("-gl_simple"))){
 457                 if (t>=glt){//allow overriding of earlier args
 458                         glt=t;
 459                         GL_texmagfilt=GL_NEAREST;
 460                         GL_texminfilt=GL_NEAREST;
 461                 }
 462         }
 463         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 464                 if (t>=glt)//allow overriding of earlier args
 465                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 466         }
 467         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 468                 if (t>=glt)//allow overriding of earlier args
 469                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 470         }
 471         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 472
 473         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 474         {
 475                 GL_texanisofilt=atof(Args[t + 1]);
 476         }
 477
 478         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 479
 480
 481         if ((t=FindArg("-gl_vidmem"))){
 482                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 483         }
 484         if ((t=FindArg("-gl_reticle"))){
 485                 gl_reticle=atoi(Args[t+1]);
 486         }
 487         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 488
 489         ogl_init();//platform specific initialization
 490
 491         ogl_init_texture_list_internal();
 492
 493         MALLOC( grd_curscreen,grs_screen,1 );
 494         memset( grd_curscreen, 0, sizeof(grs_screen));
 495         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 496
 497         // Set the mode.
 498         if ((retcode=gr_set_mode(mode)))
 499         {
 500                 return retcode;
 501         }
 502
 503         grd_curscreen->sc_canvas.cv_color = 0;
 504         grd_curscreen->sc_canvas.cv_drawmode = 0;
 505         grd_curscreen->sc_canvas.cv_font = NULL;
 506         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 507         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 508         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 509
 510         gr_installed = 1;
 511
 512         atexit(gr_close);
 513
 514         return 0;
 515 }
 516
 517 void gr_close()
 518 {
 519 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 520
 521         ogl_close();//platform specific code
 522         if (grd_curscreen){
 523                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 524                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 525                 d_free(grd_curscreen);
 526         }
 527 #ifdef OGL_RUNTIME_LOAD
 528         if (ogl_rt_loaded)
 529                 OpenGL_LoadLibrary(false);
 530 #endif
 531 }
 532 extern int r_upixelc;
 533 void ogl_upixelc(int x, int y, int c){
 534         r_upixelc++;
 535 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 536 //      if(Function_mode != FMODE_GAME){
 537 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 538 //      }else{
 539                 OGL_DISABLE(TEXTURE_2D);
 540                 glPointSize(1.0);
 541                 glBegin(GL_POINTS);
 542 //              glBegin(GL_LINES);
 543 //      ogl_pal=gr_current_pal;
 544                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 545 //      ogl_pal=gr_palette;
 546                 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);
 547 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 548                 glEnd();
 549 //      }
 550 }
 551 void ogl_urect(int left,int top,int right,int bot){
 552         GLfloat xo,yo,xf,yf;
 553         int c=COLOR;
 554
 555         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 556         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 557         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 558         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 559
 560         OGL_DISABLE(TEXTURE_2D);
 561         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 562         glBegin(GL_QUADS);
 563         glVertex2f(xo,yo);
 564         glVertex2f(xo,yf);
 565         glVertex2f(xf,yf);
 566         glVertex2f(xf,yo);
 567         glEnd();
 568 }
 569 void ogl_ulinec(int left,int top,int right,int bot,int c){
 570         GLfloat xo,yo,xf,yf;
 571
 572         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 573         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 574         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 575         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 576
 577         OGL_DISABLE(TEXTURE_2D);
 578         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 579         glBegin(GL_LINES);
 580         glVertex2f(xo,yo);
 581         glVertex2f(xf,yf);
 582         glEnd();
 583 }
 584
 585
 586 GLfloat last_r=0, last_g=0, last_b=0;
 587 int do_pal_step=0;
 588 void ogl_do_palfx(void){
 589 //      GLfloat r,g,b,a;
 590         OGL_DISABLE(TEXTURE_2D);
 591         if (gr_palette_faded_out){
 592 /*              glEnable(GL_BLEND);
 593                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 594                 glColor3f(0,0,0);
 595 //              r=g=b=0.0;a=1.0;
 596         }else{
 597                 if (do_pal_step){
 598                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 599                         glEnable(GL_BLEND);
 600                         glBlendFunc(GL_ONE,GL_ONE);
 601                         glColor3f(last_r,last_g,last_b);
 602 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 603                 }else
 604                         return;
 605         }
 606
 607
 608         glBegin(GL_QUADS);
 609         glVertex2f(0,0);
 610         glVertex2f(0,1);
 611         glVertex2f(1,1);
 612         glVertex2f(1,0);
 613         glEnd();
 614
 615         glEnable(GL_BLEND);
 616         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 617 }
 618
 619 void gr_palette_clear()
 620 {
 621         gr_palette_faded_out=1;
 622 }
 623
 624
 625 int ogl_brightness_ok = 0;
 626 int ogl_setgammaramp_ok = 1;
 627 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 628 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 629
 630 void gr_palette_step_up(int r, int g, int b)
 631 {
 632         if (gr_palette_faded_out)
 633                 return;
 634
 635         old_b_r = ogl_brightness_r;
 636         old_b_g = ogl_brightness_g;
 637         old_b_b = ogl_brightness_b;
 638
 639         ogl_brightness_r = max(r + gr_palette_gamma, 0);
 640         ogl_brightness_g = max(g + gr_palette_gamma, 0);
 641         ogl_brightness_b = max(b + gr_palette_gamma, 0);
 642
 643         if (ogl_setgammaramp_ok &&
 644             (old_b_r != ogl_brightness_r ||
 645              old_b_g != ogl_brightness_g ||
 646              old_b_b != ogl_brightness_b))
 647                 ogl_brightness_ok = !ogl_setbrightness_internal();
 648
 649         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 650         {
 651                 last_r = ogl_brightness_r / 63.0;
 652                 last_g = ogl_brightness_g / 63.0;
 653                 last_b = ogl_brightness_b / 63.0;
 654
 655                 do_pal_step = (r || g || b || gr_palette_gamma);
 656         }
 657         else
 658         {
 659                 do_pal_step = 0;
 660         }
 661 }
 662
 663 //added on 980913 by adb to fix palette problems
 664 // need a min without side effects...
 665 #undef min
 666 static inline int min(int x, int y) { return x < y ? x : y; }
 667 //end changes by adb
 668
 669 void gr_palette_load( ubyte *pal )
 670 {
 671  int i;//, j;
 672
 673  for (i=0; i<768; i++ ) {
 674      gr_current_pal[i] = pal[i];
 675      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 676  }
 677  //palette = screen->format->palette;
 678
 679  gr_palette_faded_out=0;
 680
 681         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 682
 683  init_computed_colors();
 684
 685         ogl_init_shared_palette();
 686 }
 687
 688
 689
 690 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 691 {
 692         gr_palette_faded_out=1;
 693         return 0;
 694 }
 695
 696
 697
 698 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 699 {
 700         gr_palette_faded_out=0;
 701         return 0;
 702 }
 703
 704
 705
 706 void gr_palette_read(ubyte * pal)
 707 {
 708         int i;
 709         for (i=0; i<768; i++ ) {
 710                 pal[i]=gr_current_pal[i];
 711                 if (pal[i] > 63) pal[i] = 63;
 712         }
 713 }
 714
 715 //writes out an uncompressed RGB .tga file
 716 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 717 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 718         int f;
 719 #ifdef _WIN32
 720         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
 721 #else
 722         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 723 #endif
 724         if (f>=0){
 725                 GLubyte    targaMagic[12] = { 0, //no identification field
 726                          0,//no colormap
 727                          2,//RGB image (well, BGR, actually)
 728                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 729                 GLubyte blah;
 730                 int r;
 731                 GLubyte *s;
 732                 int x,y;
 733
 734                 //write .TGA header.
 735                 write (f,targaMagic,sizeof(targaMagic));
 736                 blah=w%256;write (f,&blah,1);//w, low
 737                 blah=w/256;write (f,&blah,1);//w, high
 738                 blah=h%256;write (f,&blah,1);//h, low
 739                 blah=h/256;write (f,&blah,1);//h, high
 740                 blah=24;write (f,&blah,1);//24 bpp
 741                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 742
 743                 s=buf;
 744                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 745                         for (x=0;x<w;x++){
 746                                 blah=s[0];
 747                                 s[0]=s[2];
 748                                 s[2]=blah;
 749                                 s+=3;
 750                         }
 751                 }
 752                 x=0;y=w*h*3;
 753                 while (y > 0)
 754                 {
 755                         r=write(f,buf+x,y);
 756                         if (r<=0){
 757                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 758                                 break;
 759                         }
 760                         x+=r;y-=r;
 761                 }
 762                 close(f);
 763         }else{
 764                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 765         }
 766 }
 767 void save_screen_shot(int automap_flag)
 768 {
 769 //      fix t1;
 770         char message[100];
 771         static int savenum=0;
 772         char savename[13];
 773         unsigned char *buf;
 774
 775         if (!ogl_readpixels_ok){
 776                 if (!automap_flag)
 777                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 778                 return;
 779         }
 780
 781         stop_time();
 782
 783 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 784         if ( savenum == 9999 ) savenum = 0;
 785         sprintf(savename,"scrn%04d.tga",savenum++);
 786
 787         while(!access(savename,0))
 788         {
 789                 if ( savenum == 9999 ) savenum = 0;
 790                 sprintf(savename,"scrn%04d.tga",savenum++);
 791         }
 792         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 793 //end this section addition/change - Victor Rachels
 794
 795         if (automap_flag) {
 796 //      save_font = grd_curcanv->cv_font;
 797 //      gr_set_curfont(GAME_FONT);
 798 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 799 //      gr_get_string_size(message,&w,&h,&aw);
 800 //              modex_print_message(32, 2, message);
 801         } else {
 802                 hud_message(MSGC_GAME_FEEDBACK,message);
 803         }
 804
 805         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 806         glReadBuffer(GL_FRONT);
 807         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 808         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 809         d_free(buf);
 810
 811         key_flush();
 812         start_time();
 813 }