arch/ogl/ogl.c

   1 /* $Id: ogl.c,v 1.23 2004-05-20 07:16:53 btb Exp $ */
   2 /*
   3  *
   4  * Graphics support functions for OpenGL.
   5  *
   6  *
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <conf.h>
  11 #endif
  12
  13 //#include <stdio.h>
  14 #ifdef _WIN32
  15 #include <windows.h>
  16 #include <stddef.h>
  17 #endif
  18 #include "internal.h"
  19 #if defined(__APPLE__) && defined(__MACH__)
  20 #include <OpenGL/gl.h>
  21 #include <OpenGL/glu.h>
  22 #else
  23 #include <GL/gl.h>
  24 #include <GL/glu.h>
  25 #endif
  26 #include <string.h>
  27 #include <math.h>
  28
  29 #include "3d.h"
  30 #include "piggy.h"
  31 #include "../../3d/globvars.h"
  32 #include "error.h"
  33 #include "texmap.h"
  34 #include "palette.h"
  35 #include "rle.h"
  36 #include "mono.h"
  37
  38 #include "segment.h"
  39 #include "textures.h"
  40 #include "texmerge.h"
  41 #include "effects.h"
  42 #include "weapon.h"
  43 #include "powerup.h"
  44 #include "polyobj.h"
  45 #include "gamefont.h"
  46 #include "byteswap.h"
  47
  48 //change to 1 for lots of spew.
  49 #if 0
  50 #define glmprintf(a) mprintf(a)
  51 #else
  52 #define glmprintf(a)
  53 #endif
  54
  55 #ifndef M_PI
  56 #define M_PI 3.14159
  57 #endif
  58
  59 #if defined(_WIN32) || (defined(__APPLE__) && defined(__MACH__)) || defined(__sun__)
  60 #define cosf(a) cos(a)
  61 #define sinf(a) sin(a)
  62 #endif
  63
  64 unsigned char *ogl_pal=gr_palette;
  65
  66 int GL_texmagfilt=GL_NEAREST;
  67 int GL_texminfilt=GL_NEAREST;
  68 float GL_texanisofilt = 0;
  69 int GL_needmipmaps=0;
  70
  71 int last_width=-1,last_height=-1;
  72 int GL_TEXTURE_2D_enabled=-1;
  73 int GL_texclamp_enabled=-1;
  74
  75 extern int gr_renderstats;
  76 extern int gr_badtexture;
  77 int r_texcount = 0, r_cachedtexcount = 0;
  78 int ogl_alttexmerge=1;//merge textures by just printing the seperate textures?
  79 int ogl_rgba_format=4;
  80 int ogl_intensity4_ok=1;
  81 int ogl_luminance4_alpha4_ok=1;
  82 int ogl_rgba2_ok=1;
  83 int ogl_readpixels_ok=1;
  84 int ogl_gettexlevelparam_ok=1;
  85 #ifdef GL_ARB_multitexture
  86 int ogl_arb_multitexture_ok=0;
  87 #endif
  88 #ifdef GL_SGIS_multitexture
  89 int ogl_sgis_multitexture_ok=0;
  90 #endif
  91 int ogl_nv_texture_env_combine4_ok = 0;
  92 int ogl_ext_texture_filter_anisotropic_ok = 0;
  93
  94 int sphereh=0;
  95 int cross_lh[2]={0,0};
  96 int primary_lh[3]={0,0,0};
  97 int secondary_lh[5]={0,0,0,0,0};
  98 /*int lastbound=-1;
  99
 100 #define OGL_BINDTEXTURE(a) if(gr_badtexture>0) glBindTexture(GL_TEXTURE_2D, 0);\
 101         else if(a!=lastbound) {glBindTexture(GL_TEXTURE_2D, a);lastbound=a;}*/
 102 #define OGL_BINDTEXTURE(a) if(gr_badtexture>0) glBindTexture(GL_TEXTURE_2D, 0);\
 103         else glBindTexture(GL_TEXTURE_2D, a);
 104
 105
 106 ogl_texture ogl_texture_list[OGL_TEXTURE_LIST_SIZE];
 107 int ogl_texture_list_cur;
 108
 109 /* some function prototypes */
 110
 111 //#define OGLTEXBUFSIZE (1024*1024*4)
 112 #define OGLTEXBUFSIZE (2048*2048*4)
 113 extern GLubyte texbuf[OGLTEXBUFSIZE];
 114 //void ogl_filltexbuf(unsigned char *data,GLubyte *texp,int width,int height,int  twidth,int theight);
 115 void ogl_filltexbuf(unsigned char *data,GLubyte *texp,int truewidth,int width,int height,int dxo,int dyo,int twidth,int theight,int type);
 116 void ogl_loadbmtexture(grs_bitmap *bm);
 117 //void ogl_loadtexture(unsigned char * data, int width, int height,int dxo,intdyo , int *texid,float *u,float *v,char domipmap,float prio);
 118 void ogl_loadtexture(unsigned char * data, int dxo,int dyo, ogl_texture *tex);
 119 void ogl_freetexture(ogl_texture *gltexture);
 120 void ogl_do_palfx(void);
 121
 122 void ogl_init_texture_stats(ogl_texture* t){
 123         t->prio=0.3;//default prio
 124         t->lastrend=0;
 125         t->numrend=0;
 126 }
 127 void ogl_init_texture(ogl_texture* t){
 128         t->handle=0;
 129         t->internalformat=ogl_rgba_format;
 130         t->format=GL_RGBA;
 131         t->wrapstate[0] = -1;
 132         t->wrapstate[1] = -1;
 133         t->w=t->h=0;
 134         ogl_init_texture_stats(t);
 135 }
 136 void ogl_reset_texture_stats_internal(void){
 137         int i;
 138         for (i=0;i<OGL_TEXTURE_LIST_SIZE;i++)
 139                 if (ogl_texture_list[i].handle>0){
 140                         ogl_init_texture_stats(&ogl_texture_list[i]);
 141                 }
 142 }
 143 void ogl_init_texture_list_internal(void){
 144         int i;
 145         ogl_texture_list_cur=0;
 146         for (i=0;i<OGL_TEXTURE_LIST_SIZE;i++)
 147                 ogl_init_texture(&ogl_texture_list[i]);
 148 }
 149 void ogl_smash_texture_list_internal(void){
 150         int i;
 151         sphereh=0;
 152         memset(cross_lh,0,sizeof(cross_lh));
 153         memset(primary_lh,0,sizeof(primary_lh));
 154         memset(secondary_lh,0,sizeof(secondary_lh));
 155         for (i=0;i<OGL_TEXTURE_LIST_SIZE;i++){
 156                 if (ogl_texture_list[i].handle>0){
 157                         glDeleteTextures( 1, &ogl_texture_list[i].handle );
 158                         ogl_texture_list[i].handle=0;
 159                 }
 160                 ogl_texture_list[i].wrapstate[0] = -1;
 161                 ogl_texture_list[i].wrapstate[1] = -1;
 162         }
 163 }
 164 void ogl_vivify_texture_list_internal(void){
 165 /*
 166    int i;
 167         ogl_texture* t;
 168         for (i=0;i<OGL_TEXTURE_LIST_SIZE;i++){
 169                 t=&ogl_texture_list[i];
 170                 if (t->w>0){//erk, realised this can't be done since we'd need the texture bm_data too. hmmm.
 171                         ogl_loadbmtexture(t);
 172         }
 173 */
 174 }
 175
 176 ogl_texture* ogl_get_free_texture(void){
 177         int i;
 178         for (i=0;i<OGL_TEXTURE_LIST_SIZE;i++){
 179                 if (ogl_texture_list[ogl_texture_list_cur].handle<=0 && ogl_texture_list[ogl_texture_list_cur].w==0)
 180                         return &ogl_texture_list[ogl_texture_list_cur];
 181                 if (++ogl_texture_list_cur>=OGL_TEXTURE_LIST_SIZE)
 182                         ogl_texture_list_cur=0;
 183         }
 184         Error("OGL: texture list full!\n");
 185 //      return NULL;
 186 }
 187 int ogl_texture_stats(void){
 188         int used=0,usedl4a4=0,usedrgba=0,databytes=0,truebytes=0,datatexel=0,truetexel=0,i;
 189         int prio0=0,prio1=0,prio2=0,prio3=0,prioh=0;
 190 //      int grabbed=0;
 191         ogl_texture* t;
 192         for (i=0;i<OGL_TEXTURE_LIST_SIZE;i++){
 193                 t=&ogl_texture_list[i];
 194                 if (t->handle>0){
 195                         used++;
 196                         datatexel+=t->w*t->h;
 197                         truetexel+=t->tw*t->th;
 198                         databytes+=t->bytesu;
 199                         truebytes+=t->bytes;
 200                         if (t->prio<0.299)prio0++;
 201                         else if (t->prio<0.399)prio1++;
 202                         else if (t->prio<0.499)prio2++;
 203                         else if (t->prio<0.599)prio3++;
 204                         else prioh++;
 205                 }
 206 //              else if(t->w!=0)
 207 //                      grabbed++;
 208         }
 209         if (gr_renderstats)
 210         {
 211                 int idx, r, g, b, a, dbl, depth, res, colorsize, depthsize;
 212
 213                 res = SWIDTH * SHEIGHT;
 214                 glGetIntegerv(GL_INDEX_BITS, &idx);
 215                 glGetIntegerv(GL_RED_BITS, &r);
 216                 glGetIntegerv(GL_GREEN_BITS, &g);
 217                 glGetIntegerv(GL_BLUE_BITS, &b);
 218                 glGetIntegerv(GL_ALPHA_BITS, &a);
 219                 glGetIntegerv(GL_DOUBLEBUFFER, &dbl);
 220                 dbl += 1;
 221                 glGetIntegerv(GL_DEPTH_BITS, &depth);
 222                 colorsize = (idx * res * dbl) / 8;
 223                 depthsize = res * depth / 8;
 224                 gr_printf(5, GAME_FONT->ft_h * 14 + 3 * 14, "%i(%i,%i) %iK(%iK wasted) (%i postcachedtex)", used, usedrgba, usedl4a4, truebytes / 1024, (truebytes - databytes) / 1024, r_texcount - r_cachedtexcount);
 225                 gr_printf(5, GAME_FONT->ft_h * 15 + 3 * 15, "%ibpp(r%i,g%i,b%i,a%i)x%i=%iK depth%i=%iK", idx, r, g, b, a, dbl, colorsize / 1024, depth, depthsize / 1024);
 226                 gr_printf(5, GAME_FONT->ft_h * 16 + 3 * 16, "total=%iK", (colorsize + depthsize + truebytes) / 1024);
 227         }
 228 //      glmprintf((0,"ogl tex stats: %i(%i,%i|%i,%i,%i,%i,%i) %i(%i)b (%i(%i)wasted)\n",used,usedrgba,usedl4a4,prio0,prio1,prio2,prio3,prioh,truebytes,truetexel,truebytes-databytes,truetexel-datatexel));
 229         return truebytes;
 230 }
 231 int ogl_mem_target=-1;
 232 void ogl_clean_texture_cache(void){
 233         ogl_texture* t;
 234         int i,bytes;
 235         int time=120;
 236
 237         if (ogl_mem_target<0){
 238                 if (gr_renderstats)
 239                         ogl_texture_stats();
 240                 return;
 241         }
 242
 243         bytes=ogl_texture_stats();
 244         while (bytes>ogl_mem_target){
 245                 for (i=0;i<OGL_TEXTURE_LIST_SIZE;i++){
 246                         t=&ogl_texture_list[i];
 247                         if (t->handle>0){
 248                                 if (t->lastrend+f1_0*time<GameTime){
 249                                         ogl_freetexture(t);
 250                                         bytes-=t->bytes;
 251                                         if (bytes<ogl_mem_target)
 252                                                 return;
 253                                 }
 254                         }
 255                 }
 256                 if (time==0)
 257                         Error("not enough mem?");
 258                 time=time/2;
 259         }
 260
 261 }
 262 void ogl_bindbmtex(grs_bitmap *bm){
 263         if (bm->gltexture==NULL || bm->gltexture->handle<=0)
 264                 ogl_loadbmtexture(bm);
 265         OGL_BINDTEXTURE(bm->gltexture->handle);
 266         bm->gltexture->lastrend=GameTime;
 267         bm->gltexture->numrend++;
 268 ////    if (bm->gltexture->numrend==80 || bm->gltexture->numrend==4000 || bm->gltexture->numrend==80000){
 269 //      if (bm->gltexture->numrend==100){
 270 //              bm->gltexture->prio+=0.1;
 271 ////            glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_PRIORITY,bm->gltexture->prio);
 272 //              glPrioritizeTextures(1,&bm->gltexture->handle,&bm->gltexture->prio);
 273 //      }
 274 }
 275 //gltexture MUST be bound first
 276 void ogl_texwrap(ogl_texture *gltexture,int state)
 277 {
 278         if (gltexture->wrapstate[active_texture_unit] != state || gltexture->numrend < 1)
 279         {
 280                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, state);
 281                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, state);
 282                 gltexture->wrapstate[active_texture_unit] = state;
 283         }
 284 }
 285
 286 //crude texture precaching
 287 //handles: powerups, walls, weapons, polymodels, etc.
 288 //it is done with the horrid do_special_effects kludge so that sides that have to be texmerged and have animated textures will be correctly cached.
 289 //similarly, with the objects(esp weapons), we could just go through and cache em all instead, but that would get ones that might not even be on the level
 290 //TODO: doors
 291
 292 void ogl_cache_polymodel_textures(int model_num){
 293         polymodel *po=&Polygon_models[model_num];
 294         int i;
 295         for (i=0;i<po->n_textures;i++)  {
 296 //              texture_list_index[i] = ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]];
 297                 ogl_loadbmtexture(&GameBitmaps[ObjBitmaps[ObjBitmapPtrs[po->first_texture+i]].index]);
 298         }
 299 }
 300 void ogl_cache_vclip_textures(vclip *vc){
 301         int i;
 302         for (i=0;i<vc->num_frames;i++){
 303                 PIGGY_PAGE_IN(vc->frames[i]);
 304                 ogl_loadbmtexture(&GameBitmaps[vc->frames[i].index]);
 305         }
 306 }
 307 #define ogl_cache_vclipn_textures(i) ogl_cache_vclip_textures(&Vclip[i])
 308 void ogl_cache_weapon_textures(weapon_info *w){
 309         ogl_cache_vclipn_textures(w->flash_vclip);
 310         ogl_cache_vclipn_textures(w->robot_hit_vclip);
 311         ogl_cache_vclipn_textures(w->wall_hit_vclip);
 312         if (w->render_type==WEAPON_RENDER_VCLIP)
 313                 ogl_cache_vclipn_textures(w->weapon_vclip);
 314         else if (w->render_type==WEAPON_RENDER_POLYMODEL)
 315                 ogl_cache_polymodel_textures(w->model_num);
 316 }
 317
 318 void ogl_cache_level_textures(void)
 319 {
 320         int seg,side,i;
 321         eclip *ec;
 322         short tmap1,tmap2;
 323         grs_bitmap *bm,*bm2;
 324         struct side *sidep;
 325         int max_efx=0,ef;
 326
 327         ogl_reset_texture_stats_internal();//loading a new lev should reset textures
 328
 329         for (i=0,ec=Effects;i<Num_effects;i++,ec++) {
 330                 if ((Effects[i].changing_wall_texture == -1) && (Effects[i].changing_object_texture==-1) )
 331                         continue;
 332                 if (ec->vc.num_frames>max_efx)
 333                         max_efx=ec->vc.num_frames;
 334         }
 335         glmprintf((0,"max_efx:%i\n",max_efx));
 336         for (ef=0;ef<max_efx;ef++){
 337                 for (i=0,ec=Effects;i<Num_effects;i++,ec++) {
 338                         if ((Effects[i].changing_wall_texture == -1) && (Effects[i].changing_object_texture==-1) )
 339                                 continue;
 340 //                      if (ec->vc.num_frames>max_efx)
 341 //                              max_efx=ec->vc.num_frames;
 342                         ec->time_left=-1;
 343                 }
 344                 do_special_effects();
 345
 346                 for (seg=0;seg<Num_segments;seg++){
 347                         for (side=0;side<MAX_SIDES_PER_SEGMENT;side++){
 348                                 sidep=&Segments[seg].sides[side];
 349                                 tmap1=sidep->tmap_num;
 350                                 tmap2=sidep->tmap_num2;
 351                                 if (tmap1<0 || tmap1>=NumTextures){
 352                                         glmprintf((0,"ogl_cache_level_textures %i %i %i %i\n",seg,side,tmap1,NumTextures));
 353                                         //                              tmap1=0;
 354                                         continue;
 355                                 }
 356                                 PIGGY_PAGE_IN(Textures[tmap1]);
 357                                 bm = &GameBitmaps[Textures[tmap1].index];
 358                                 if (tmap2 != 0){
 359                                         PIGGY_PAGE_IN(Textures[tmap2&0x3FFF]);
 360                                         bm2 = &GameBitmaps[Textures[tmap2&0x3FFF].index];
 361                                         if (ogl_alttexmerge==0 || (bm2->bm_flags & BM_FLAG_SUPER_TRANSPARENT))
 362                                                 bm = texmerge_get_cached_bitmap( tmap1, tmap2 );
 363                                         else {
 364                                                 ogl_loadbmtexture(bm2);
 365                                         }
 366                                         //                              glmprintf((0,"ogl_cache_level_textures seg %i side %i t1 %i t2 %x bm %p NT %i\n",seg,side,tmap1,tmap2,bm,NumTextures));
 367                                 }
 368                                 ogl_loadbmtexture(bm);
 369                         }
 370                 }
 371                 glmprintf((0,"finished ef:%i\n",ef));
 372         }
 373         reset_special_effects();
 374         init_special_effects();
 375         {
 376 //              int laserlev=1;
 377                 //always have lasers and concs
 378                 ogl_cache_weapon_textures(&Weapon_info[Primary_weapon_to_weapon_info[LASER_INDEX]]);
 379                 ogl_cache_weapon_textures(&Weapon_info[Secondary_weapon_to_weapon_info[CONCUSSION_INDEX]]);
 380                 for (i=0;i<Highest_object_index;i++){
 381                         if(Objects[i].render_type==RT_POWERUP){
 382                                 ogl_cache_vclipn_textures(Objects[i].rtype.vclip_info.vclip_num);
 383                                 switch (Objects[i].id){
 384 /*                                      case POW_LASER:
 385                                                 ogl_cache_weapon_textures(&Weapon_info[Primary_weapon_to_weapon_info[LASER_INDEX]]);
 386 //                                              if (laserlev<4)
 387 //                                                      laserlev++;
 388                                                 break;*/
 389                                         case POW_VULCAN_WEAPON:
 390                                                 ogl_cache_weapon_textures(&Weapon_info[Primary_weapon_to_weapon_info[VULCAN_INDEX]]);
 391                                                 break;
 392                                         case POW_SPREADFIRE_WEAPON:
 393                                                 ogl_cache_weapon_textures(&Weapon_info[Primary_weapon_to_weapon_info[SPREADFIRE_INDEX]]);
 394                                                 break;
 395                                         case POW_PLASMA_WEAPON:
 396                                                 ogl_cache_weapon_textures(&Weapon_info[Primary_weapon_to_weapon_info[PLASMA_INDEX]]);
 397                                                 break;
 398                                         case POW_FUSION_WEAPON:
 399                                                 ogl_cache_weapon_textures(&Weapon_info[Primary_weapon_to_weapon_info[FUSION_INDEX]]);
 400                                                 break;
 401 /*                                      case POW_MISSILE_1:
 402                                         case POW_MISSILE_4:
 403                                                 ogl_cache_weapon_textures(&Weapon_info[Secondary_weapon_to_weapon_info[CONCUSSION_INDEX]]);
 404                                                 break;*/
 405                                         case POW_PROXIMITY_WEAPON:
 406                                                 ogl_cache_weapon_textures(&Weapon_info[Secondary_weapon_to_weapon_info[PROXIMITY_INDEX]]);
 407                                                 break;
 408                                         case POW_HOMING_AMMO_1:
 409                                         case POW_HOMING_AMMO_4:
 410                                                 ogl_cache_weapon_textures(&Weapon_info[Primary_weapon_to_weapon_info[HOMING_INDEX]]);
 411                                                 break;
 412                                         case POW_SMARTBOMB_WEAPON:
 413                                                 ogl_cache_weapon_textures(&Weapon_info[Secondary_weapon_to_weapon_info[SMART_INDEX]]);
 414                                                 break;
 415                                         case POW_MEGA_WEAPON:
 416                                                 ogl_cache_weapon_textures(&Weapon_info[Secondary_weapon_to_weapon_info[MEGA_INDEX]]);
 417                                                 break;
 418                                 }
 419                         }
 420                         else if(Objects[i].render_type==RT_POLYOBJ){
 421                                 ogl_cache_polymodel_textures(Objects[i].rtype.pobj_info.model_num);
 422                         }
 423                 }
 424         }
 425         glmprintf((0,"finished caching\n"));
 426         r_cachedtexcount = r_texcount;
 427 }
 428
 429 int r_polyc,r_tpolyc,r_bitmapc,r_ubitmapc,r_ubitbltc,r_upixelc;
 430 #define f2glf(x) (f2fl(x))
 431
 432 bool g3_draw_line(g3s_point *p0,g3s_point *p1)
 433 {
 434         int c;
 435         c=grd_curcanv->cv_color;
 436         OGL_DISABLE(TEXTURE_2D);
 437         glColor3f(PAL2Tr(c),PAL2Tg(c),PAL2Tb(c));
 438         glBegin(GL_LINES);
 439         glVertex3f(f2glf(p0->p3_vec.x),f2glf(p0->p3_vec.y),-f2glf(p0->p3_vec.z));
 440         glVertex3f(f2glf(p1->p3_vec.x),f2glf(p1->p3_vec.y),-f2glf(p1->p3_vec.z));
 441         glEnd();
 442         return 1;
 443 }
 444 void ogl_drawcircle2(int nsides,int type,float xsc,float xo,float ysc,float yo){
 445         int i;
 446         float ang;
 447         glBegin(type);
 448         for (i=0; i<nsides; i++) {
 449                 ang = 2.0*M_PI*i/nsides;
 450                 glVertex2f(cosf(ang)*xsc+xo,sinf(ang)*ysc+yo);
 451         }
 452         glEnd();
 453 }
 454 void ogl_drawcircle(int nsides,int type){
 455         int i;
 456         float ang;
 457         glBegin(type);
 458         for (i=0; i<nsides; i++) {
 459                 ang = 2.0*M_PI*i/nsides;
 460                 glVertex2f(cosf(ang),sinf(ang));
 461         }
 462         glEnd();
 463 }
 464 int circle_list_init(int nsides,int type,int mode) {
 465         int hand=glGenLists(1);
 466         glNewList(hand, mode);
 467         /* draw a unit radius circle in xy plane centered on origin */
 468         ogl_drawcircle(nsides,type);
 469         glEndList();
 470         return hand;
 471 }
 472 float bright_g[4]={     32.0/256,       252.0/256,      32.0/256};
 473 float dark_g[4]={       32.0/256,       148.0/256,      32.0/256};
 474 float darker_g[4]={     32.0/256,       128.0/256,      32.0/256};
 475 void ogl_draw_reticle(int cross,int primary,int secondary){
 476         float scale=(float)Canvas_height/(float)grd_curscreen->sc_h;
 477         glPushMatrix();
 478 //      glTranslatef(0.5,0.5,0);
 479         glTranslatef((grd_curcanv->cv_bitmap.bm_w/2+grd_curcanv->cv_bitmap.bm_x)/(float)last_width,1.0-(grd_curcanv->cv_bitmap.bm_h/2+grd_curcanv->cv_bitmap.bm_y)/(float)last_height,0);
 480         glScalef(scale/320.0,scale/200.0,scale);//the positions are based upon the standard reticle at 320x200 res.
 481
 482         OGL_DISABLE(TEXTURE_2D);
 483
 484         if (!cross_lh[cross]){
 485                 cross_lh[cross]=glGenLists(1);
 486                 glNewList(cross_lh[cross], GL_COMPILE_AND_EXECUTE);
 487                 glBegin(GL_LINES);
 488                 //cross top left
 489                 glColor3fv(darker_g);
 490                 glVertex2f(-4.0,4.0);
 491                 if (cross)
 492                         glColor3fv(bright_g);
 493                 else
 494                         glColor3fv(dark_g);
 495                 glVertex2f(-2.0,2.0);
 496
 497                 //cross bottom left
 498                 glColor3fv(dark_g);
 499                 glVertex2f(-3.0,-2.0);
 500                 if (cross)
 501                         glColor3fv(bright_g);
 502                 glVertex2f(-2.0,-1.0);
 503
 504                 //cross top right
 505                 glColor3fv(darker_g);
 506                 glVertex2f(4.0,4.0);
 507                 if (cross)
 508                         glColor3fv(bright_g);
 509                 else
 510                         glColor3fv(dark_g);
 511                 glVertex2f(2.0,2.0);
 512
 513                 //cross bottom right
 514                 glColor3fv(dark_g);
 515                 glVertex2f(3.0,-2.0);
 516                 if (cross)
 517                         glColor3fv(bright_g);
 518                 glVertex2f(2.0,-1.0);
 519
 520                 glEnd();
 521                 glEndList();
 522         }else
 523                 glCallList(cross_lh[cross]);
 524
 525 //      if (Canvas_height>200)
 526 //              glLineWidth(Canvas_height/(float)200);
 527         if (!primary_lh[primary]){
 528                 primary_lh[primary]=glGenLists(1);
 529                 glNewList(primary_lh[primary], GL_COMPILE_AND_EXECUTE);
 530
 531                 glColor3fv(dark_g);
 532                 glBegin(GL_LINES);
 533                 //left primary bar
 534                 glVertex2f(-14.0,-8.0);
 535                 glVertex2f(-8.0,-5.0);
 536                 //right primary bar
 537                 glVertex2f(14.0,-8.0);
 538                 glVertex2f(8.0,-5.0);
 539                 glEnd();
 540                 if (primary==0)
 541                         glColor3fv(dark_g);
 542                 else
 543                         glColor3fv(bright_g);
 544                 //left upper
 545                 ogl_drawcircle2(6,GL_POLYGON,1.5,-7.0,1.5,-5.0);
 546                 //right upper
 547                 ogl_drawcircle2(6,GL_POLYGON,1.5,7.0,1.5,-5.0);
 548                 if (primary!=2)
 549                         glColor3fv(dark_g);
 550                 else
 551                         glColor3fv(bright_g);
 552                 //left lower
 553                 ogl_drawcircle2(4,GL_POLYGON,1.0,-14.0,1.0,-8.0);
 554                 //right lower
 555                 ogl_drawcircle2(4,GL_POLYGON,1.0,14.0,1.0,-8.0);
 556
 557                 glEndList();
 558         }else
 559                 glCallList(primary_lh[primary]);
 560 //      if (Canvas_height>200)
 561 //              glLineWidth(1);
 562
 563         if (!secondary_lh[secondary]){
 564                 secondary_lh[secondary]=glGenLists(1);
 565                 glNewList(secondary_lh[secondary], GL_COMPILE_AND_EXECUTE);
 566                 if (secondary<=2){
 567                         //left secondary
 568                         if (secondary!=1)
 569                                 glColor3fv(darker_g);
 570                         else
 571                                 glColor3fv(bright_g);
 572                         ogl_drawcircle2(8,GL_LINE_LOOP,2.0,-10.0,2.0,-1.0);
 573                         //right secondary
 574                         if (secondary!=2)
 575                                 glColor3fv(darker_g);
 576                         else
 577                                 glColor3fv(bright_g);
 578                         ogl_drawcircle2(8,GL_LINE_LOOP,2.0,10.0,2.0,-1.0);
 579                 }else{
 580                         //bottom/middle secondary
 581                         if (secondary!=4)
 582                                 glColor3fv(darker_g);
 583                         else
 584                                 glColor3fv(bright_g);
 585                         ogl_drawcircle2(8,GL_LINE_LOOP,2.0,0.0,2.0,-7.0);
 586                 }
 587                 glEndList();
 588         }else
 589                 glCallList(secondary_lh[secondary]);
 590
 591         glPopMatrix();
 592 }
 593 int g3_draw_sphere(g3s_point *pnt,fix rad){
 594         int c;
 595         c=grd_curcanv->cv_color;
 596         OGL_DISABLE(TEXTURE_2D);
 597 //      glPointSize(f2glf(rad));
 598         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 599 //      glBegin(GL_POINTS);
 600 //      glVertex3f(f2glf(pnt->p3_vec.x),f2glf(pnt->p3_vec.y),-f2glf(pnt->p3_vec.z));
 601 //      glEnd();
 602         glPushMatrix();
 603         glTranslatef(f2glf(pnt->p3_vec.x),f2glf(pnt->p3_vec.y),-f2glf(pnt->p3_vec.z));
 604         glScalef(f2glf(rad),f2glf(rad),f2glf(rad));
 605         if (!sphereh) sphereh=circle_list_init(20,GL_POLYGON,GL_COMPILE_AND_EXECUTE);
 606         else glCallList(sphereh);
 607         glPopMatrix();
 608         return 0;
 609
 610 }
 611 int gr_ucircle(fix xc1, fix yc1, fix r1)
 612 {
 613         int c;
 614         c=grd_curcanv->cv_color;
 615         OGL_DISABLE(TEXTURE_2D);
 616         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 617         glPushMatrix();
 618         glTranslatef(
 619                      (f2fl(xc1) + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width,
 620                      1.0 - (f2fl(yc1) + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height,0);
 621         glScalef(f2fl(r1) / last_width, f2fl(r1) / last_height, 1.0);
 622         ogl_drawcircle(10 + 2 * (int)(M_PI * f2fl(r1) / 19), GL_LINE_LOOP);
 623         glPopMatrix();
 624         return 0;
 625 }
 626 int gr_circle(fix xc1,fix yc1,fix r1){
 627         return gr_ucircle(xc1,yc1,r1);
 628 }
 629
 630 bool g3_draw_poly(int nv,g3s_point **pointlist)
 631 {
 632         int c;
 633         r_polyc++;
 634         c=grd_curcanv->cv_color;
 635 //      glColor3f((gr_palette[c*3]+gr_palette_gamma)/63.0,(gr_palette[c*3+1]+gr_palette_gamma)/63.0,(gr_palette[c*3+2]+gr_palette_gamma)/63.0);
 636         OGL_DISABLE(TEXTURE_2D);
 637         if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
 638                 glColor3f(PAL2Tr(c), PAL2Tg(c), PAL2Tb(c));
 639         else
 640                 glColor4f(PAL2Tr(c), PAL2Tg(c), PAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
 641         glBegin(GL_TRIANGLE_FAN);
 642         for (c=0;c<nv;c++){
 643         //      glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),f2glf(pointlist[c]->p3_vec.z));
 644                 glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),-f2glf(pointlist[c]->p3_vec.z));
 645         }
 646         glEnd();
 647         return 0;
 648 }
 649
 650 void gr_upoly_tmap(int nverts, int *vert ){
 651                 mprintf((0,"gr_upoly_tmap: unhandled\n"));//should never get called
 652 }
 653 void draw_tmap_flat(grs_bitmap *bm,int nv,g3s_point **vertlist){
 654                 mprintf((0,"draw_tmap_flat: unhandled\n"));//should never get called
 655 }
 656 extern void (*tmap_drawer_ptr)(grs_bitmap *bm,int nv,g3s_point **vertlist);
 657 bool g3_draw_tmap(int nv,g3s_point **pointlist,g3s_uvl *uvl_list,grs_bitmap *bm)
 658 {
 659         int c;
 660         float l;
 661         if (tmap_drawer_ptr==draw_tmap_flat){
 662 /*              fix average_light=0;
 663                 int i;
 664                 for (i=0; i<nv; i++)
 665                         average_light += uvl_list[i].l;*/
 666                 OGL_DISABLE(TEXTURE_2D);
 667 //              glmprintf((0,"Gr_scanline_darkening_level=%i %f\n",Gr_scanline_darkening_level,Gr_scanline_darkening_level/(float)NUM_LIGHTING_LEVELS));
 668                 glColor4f(0,0,0,1.0-(Gr_scanline_darkening_level/(float)NUM_LIGHTING_LEVELS));
 669                 //glColor4f(0,0,0,f2fl(average_light/nv));
 670                 glBegin(GL_TRIANGLE_FAN);
 671                 for (c=0;c<nv;c++){
 672 //                      glColor4f(0,0,0,f2fl(uvl_list[c].l));
 673 //                      glTexCoord2f(f2glf(uvl_list[c].u),f2glf(uvl_list[c].v));
 674                         glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),-f2glf(pointlist[c]->p3_vec.z));
 675                 }
 676                 glEnd();
 677         }else if (tmap_drawer_ptr==draw_tmap){
 678                 r_tpolyc++;
 679                 /*      if (bm->bm_w !=64||bm->bm_h!=64)
 680                         printf("g3_draw_tmap w %i h %i\n",bm->bm_w,bm->bm_h);*/
 681                 OGL_ENABLE(TEXTURE_2D);
 682                 ogl_bindbmtex(bm);
 683                 ogl_texwrap(bm->gltexture,GL_REPEAT);
 684                 glBegin(GL_TRIANGLE_FAN);
 685                 for (c=0;c<nv;c++){
 686                         if (bm->bm_flags&BM_FLAG_NO_LIGHTING){
 687                                 l=1.0;
 688                         }else{
 689                                 //l=f2fl(uvl_list[c].l)+gr_palette_gamma/63.0;
 690                                 l=f2fl(uvl_list[c].l);
 691                         }
 692                         glColor3f(l,l,l);
 693                         glTexCoord2f(f2glf(uvl_list[c].u),f2glf(uvl_list[c].v));
 694                         //glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),f2glf(pointlist[c]->p3_vec.z));
 695                         glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),-f2glf(pointlist[c]->p3_vec.z));
 696                 }
 697                 glEnd();
 698         }else{
 699                 mprintf((0,"g3_draw_tmap: unhandled tmap_drawer %p\n",tmap_drawer_ptr));
 700         }
 701         return 0;
 702 }
 703
 704 int active_texture_unit = 0;
 705
 706 void ogl_setActiveTexture(int t)
 707 {
 708         if (ogl_arb_multitexture_ok)
 709         {
 710 #ifdef GL_ARB_multitexture
 711                 if (t == 0)
 712                         glActiveTextureARB(GL_TEXTURE0_ARB);
 713                 else
 714                         glActiveTextureARB(GL_TEXTURE1_ARB);
 715 #endif
 716         }
 717         else if (ogl_sgis_multitexture_ok)
 718         {
 719 #ifdef GL_SGIS_multitexture
 720                 if (t == 0)
 721                         glSelectTextureSGIS(GL_TEXTURE0_SGIS);
 722                 else
 723                         glSelectTextureSGIS(GL_TEXTURE1_SGIS);
 724 #endif
 725         }
 726         active_texture_unit = t;
 727 }
 728
 729 void ogl_MultiTexCoord2f(int t, float u, float v)
 730 {
 731         if (ogl_arb_multitexture_ok)
 732         {
 733 #ifdef GL_ARB_multitexture
 734                 if (t == 0)
 735                         glMultiTexCoord2fARB(GL_TEXTURE0_ARB, u, v);
 736                 else
 737                         glMultiTexCoord2fARB(GL_TEXTURE1_ARB, u, v);
 738 #endif
 739         }
 740         else if (ogl_sgis_multitexture_ok)
 741         {
 742 #ifdef GL_SGIS_multitexture
 743                 if (t == 0)
 744                         glMultiTexCoord2fSGIS(GL_TEXTURE0_SGIS, u, v);
 745                 else
 746                         glMultiTexCoord2fSGIS(GL_TEXTURE1_SGIS, u, v);
 747 #endif
 748         }
 749 }
 750
 751 bool g3_draw_tmap_2(int nv, g3s_point **pointlist, g3s_uvl *uvl_list, grs_bitmap *bmbot, grs_bitmap *bm, int orient)
 752 {
 753 #if (defined(GL_NV_texture_env_combine4) && (defined(GL_ARB_multitexture) || defined(GL_SGIS_multitexture)))
 754         if (ogl_nv_texture_env_combine4_ok && (ogl_arb_multitexture_ok || ogl_sgis_multitexture_ok))
 755         {
 756                 int c;
 757                 float l, u1, v1;
 758
 759                 if (tmap_drawer_ptr != draw_tmap)
 760                         Error("WTFF\n");
 761
 762                 r_tpolyc+=2;
 763
 764                 //ogl_setActiveTexture(0);
 765                 OGL_ENABLE(TEXTURE_2D);
 766                 ogl_bindbmtex(bmbot);
 767                 ogl_texwrap(bmbot->gltexture, GL_REPEAT);
 768                 // GL_MODULATE is fine for texture 0
 769
 770                 ogl_setActiveTexture(1);
 771                 glEnable(GL_TEXTURE_2D);
 772                 ogl_bindbmtex(bm);
 773                 ogl_texwrap(bm->gltexture,GL_REPEAT);
 774
 775                 // GL_DECAL works sorta ok but the top texture is fullbright.
 776                 //glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
 777
 778                 // http://oss.sgi.com/projects/ogl-sample/registry/NV/texture_env_combine4.txt
 779                 // only GL_NV_texture_env_combine4 lets us do what we need:
 780                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE4_NV);
 781
 782                 // multiply top texture by color(vertex lighting) and add bottom texture(where alpha says to)
 783                 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_EXT, GL_ADD);
 784
 785                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_EXT, GL_TEXTURE);
 786                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_EXT, GL_PRIMARY_COLOR_EXT);
 787                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_EXT, GL_TEXTURE);
 788                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE3_RGB_NV, GL_PREVIOUS_EXT);
 789
 790                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_EXT, GL_SRC_COLOR);
 791                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB_EXT, GL_SRC_COLOR);
 792                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB_EXT, GL_ONE_MINUS_SRC_ALPHA);
 793                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND3_RGB_NV, GL_SRC_COLOR);
 794
 795                 // add up alpha channels
 796                 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_EXT, GL_ADD);
 797
 798                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_EXT, GL_TEXTURE);
 799                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_EXT, GL_ZERO);
 800                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_ALPHA_EXT, GL_PREVIOUS_EXT);
 801                 glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE3_ALPHA_NV, GL_ZERO);
 802
 803                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_EXT, GL_SRC_ALPHA);
 804                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_EXT, GL_ONE_MINUS_SRC_ALPHA);
 805                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA_EXT, GL_SRC_ALPHA);
 806                 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND3_ALPHA_NV, GL_ONE_MINUS_SRC_ALPHA);
 807
 808                 // GL_ARB_texture_env_combine comes close, but doesn't quite make it.
 809                 //glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
 810
 811                 //// this gives effect like GL_DECAL:
 812                 //glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_INTERPOLATE);
 813                 //glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_TEXTURE);
 814                 //glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_PREVIOUS_ARB);
 815                 //glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE2_RGB_ARB, GL_TEXTURE);
 816
 817
 818                 // this properly shades the top texture, but the bottom texture doesn't get through.
 819                 //glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB, GL_MODULATE);
 820                 //glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB, GL_PRIMARY_COLOR_ARB);
 821                 //glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_RGB_ARB, GL_TEXTURE);
 822
 823
 824                 // add up alpha
 825                 //glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB, GL_ADD);
 826                 //glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB, GL_TEXTURE);
 827                 //glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB, GL_PREVIOUS_ARB);
 828
 829
 830                 glBegin(GL_TRIANGLE_FAN);
 831                 for (c=0;c<nv;c++){
 832                         switch(orient){
 833                                 case 1:
 834                                         u1=1.0-f2glf(uvl_list[c].v);
 835                                         v1=f2glf(uvl_list[c].u);
 836                                         break;
 837                                 case 2:
 838                                         u1=1.0-f2glf(uvl_list[c].u);
 839                                         v1=1.0-f2glf(uvl_list[c].v);
 840                                         break;
 841                                 case 3:
 842                                         u1=f2glf(uvl_list[c].v);
 843                                         v1=1.0-f2glf(uvl_list[c].u);
 844                                         break;
 845                                 default:
 846                                         u1=f2glf(uvl_list[c].u);
 847                                         v1=f2glf(uvl_list[c].v);
 848                                         break;
 849                         }
 850                         if (bm->bm_flags&BM_FLAG_NO_LIGHTING){
 851                                 l=1.0;
 852                         }else{
 853                                 l=f2fl(uvl_list[c].l);
 854                         }
 855                         glColor3f(l,l,l);
 856                         ogl_MultiTexCoord2f(0, f2glf(uvl_list[c].u), f2glf(uvl_list[c].v));
 857                         ogl_MultiTexCoord2f(1, u1, v1);
 858                         //glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),f2glf(pointlist[c]->p3_vec.z));
 859                         //glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),f2glf(pointlist[c]->p3_vec.z));
 860                         glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),-f2glf(pointlist[c]->p3_vec.z));
 861                 }
 862                 glEnd();
 863                 //ogl_setActiveTexture(1); // still the active texture
 864                 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
 865                 glDisable(GL_TEXTURE_2D);
 866                 ogl_setActiveTexture(0);
 867         }
 868         else
 869 #endif
 870         {
 871                 int c;
 872                 float l,u1,v1;
 873
 874                 g3_draw_tmap(nv,pointlist,uvl_list,bmbot);//draw the bottom texture first.. could be optimized with multitexturing..
 875
 876                 r_tpolyc++;
 877                 /*      if (bm->bm_w !=64||bm->bm_h!=64)
 878                         printf("g3_draw_tmap w %i h %i\n",bm->bm_w,bm->bm_h);*/
 879                 OGL_ENABLE(TEXTURE_2D);
 880                 ogl_bindbmtex(bm);
 881                 ogl_texwrap(bm->gltexture,GL_REPEAT);
 882                 glBegin(GL_TRIANGLE_FAN);
 883                 for (c=0;c<nv;c++){
 884                         switch(orient){
 885                                 case 1:
 886                                         u1=1.0-f2glf(uvl_list[c].v);
 887                                         v1=f2glf(uvl_list[c].u);
 888                                         break;
 889                                 case 2:
 890                                         u1=1.0-f2glf(uvl_list[c].u);
 891                                         v1=1.0-f2glf(uvl_list[c].v);
 892                                         break;
 893                                 case 3:
 894                                         u1=f2glf(uvl_list[c].v);
 895                                         v1=1.0-f2glf(uvl_list[c].u);
 896                                         break;
 897                                 default:
 898                                         u1=f2glf(uvl_list[c].u);
 899                                         v1=f2glf(uvl_list[c].v);
 900                                         break;
 901                         }
 902                         if (bm->bm_flags&BM_FLAG_NO_LIGHTING){
 903                                 l=1.0;
 904                         }else{
 905                                 //l=f2fl(uvl_list[c].l)+gr_palette_gamma/63.0;
 906                                 l=f2fl(uvl_list[c].l);
 907                         }
 908                         glColor3f(l,l,l);
 909                         glTexCoord2f(u1,v1);
 910                         //glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),f2glf(pointlist[c]->p3_vec.z));
 911                         //glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),f2glf(pointlist[c]->p3_vec.z));
 912                         glVertex3f(f2glf(pointlist[c]->p3_vec.x),f2glf(pointlist[c]->p3_vec.y),-f2glf(pointlist[c]->p3_vec.z));
 913                 }
 914                 glEnd();
 915         }
 916         return 0;
 917 }
 918
 919 bool g3_draw_bitmap(vms_vector *pos,fix width,fix height,grs_bitmap *bm, int orientation)
 920 {
 921         //float l=1.0;
 922         vms_vector pv,v1;//,v2;
 923         int i;
 924         r_bitmapc++;
 925         v1.z=0;
 926 //      printf("g3_draw_bitmap: %f,%f,%f - ",f2glf(pos->x),f2glf(pos->y),-f2glf(pos->z));
 927 //      printf("(%f,%f,%f) ",f2glf(View_position.x),f2glf(View_position.y),-f2glf(View_position.z));
 928
 929         OGL_ENABLE(TEXTURE_2D);
 930         ogl_bindbmtex(bm);
 931         ogl_texwrap(bm->gltexture,GL_CLAMP);
 932
 933         glBegin(GL_QUADS);
 934         glColor3f(1.0,1.0,1.0);
 935     width = fixmul(width,Matrix_scale.x);
 936     height = fixmul(height,Matrix_scale.y);
 937         for (i=0;i<4;i++){
 938 //              g3_rotate_point(&p[i],pos);
 939                 vm_vec_sub(&v1,pos,&View_position);
 940                 vm_vec_rotate(&pv,&v1,&View_matrix);
 941 //              printf(" %f,%f,%f->",f2glf(pv.x),f2glf(pv.y),-f2glf(pv.z));
 942                 switch (i){
 943                         case 0:
 944                                 glTexCoord2f(0.0, 0.0);
 945                                 pv.x+=-width;
 946                                 pv.y+=height;
 947                                 break;
 948                         case 1:
 949                                 glTexCoord2f(bm->gltexture->u, 0.0);
 950                                 pv.x+=width;
 951                                 pv.y+=height;
 952                                 break;
 953                         case 2:
 954                                 glTexCoord2f(bm->gltexture->u, bm->gltexture->v);
 955                                 pv.x+=width;
 956                                 pv.y+=-height;
 957                                 break;
 958                         case 3:
 959                                 glTexCoord2f(0.0, bm->gltexture->v);
 960                                 pv.x+=-width;
 961                                 pv.y+=-height;
 962                                 break;
 963                 }
 964 //              vm_vec_rotate(&v2,&v1,&View_matrix);
 965 //              vm_vec_sub(&v1,&v2,&pv);
 966                 //vm_vec_sub(&v1,&pv,&v2);
 967 //              vm_vec_sub(&v2,&pv,&v1);
 968                 glVertex3f(f2glf(pv.x),f2glf(pv.y),-f2glf(pv.z));
 969 //              printf("%f,%f,%f ",f2glf(v1.x),f2glf(v1.y),-f2glf(v1.z));
 970         }
 971         glEnd();
 972 //      printf("\n");
 973
 974         return 0;
 975 }
 976
 977 bool ogl_ubitmapm_c(int x, int y,grs_bitmap *bm,int c)
 978 {
 979         GLfloat xo,yo,xf,yf;
 980         GLfloat u1,u2,v1,v2;
 981         r_ubitmapc++;
 982         x+=grd_curcanv->cv_bitmap.bm_x;
 983         y+=grd_curcanv->cv_bitmap.bm_y;
 984         xo=x/(float)last_width;
 985         xf=(bm->bm_w+x)/(float)last_width;
 986         yo=1.0-y/(float)last_height;
 987         yf=1.0-(bm->bm_h+y)/(float)last_height;
 988
 989 //      printf("g3_draw_bitmap: %f,%f,%f - ",f2glf(pos->x),f2glf(pos->y),-f2glf(pos->z));
 990 //      printf("(%f,%f,%f) ",f2glf(View_position.x),f2glf(View_position.y),-f2glf(View_position.z));
 991
 992 /*              glEnABLE(ALPHA_TEST);
 993         glAlphaFunc(GL_GREATER,0.0);*/
 994
 995         OGL_ENABLE(TEXTURE_2D);
 996         ogl_bindbmtex(bm);
 997         ogl_texwrap(bm->gltexture,GL_CLAMP);
 998
 999         if (bm->bm_x==0){
1000                 u1=0;
1001                 if (bm->bm_w==bm->gltexture->w)
1002                         u2=bm->gltexture->u;
1003                 else
1004                         u2=(bm->bm_w+bm->bm_x)/(float)bm->gltexture->tw;
1005         }else {
1006                 u1=bm->bm_x/(float)bm->gltexture->tw;
1007                 u2=(bm->bm_w+bm->bm_x)/(float)bm->gltexture->tw;
1008         }
1009         if (bm->bm_y==0){
1010                 v1=0;
1011                 if (bm->bm_h==bm->gltexture->h)
1012                         v2=bm->gltexture->v;
1013                 else
1014                         v2=(bm->bm_h+bm->bm_y)/(float)bm->gltexture->th;
1015         }else{
1016                 v1=bm->bm_y/(float)bm->gltexture->th;
1017                 v2=(bm->bm_h+bm->bm_y)/(float)bm->gltexture->th;
1018         }
1019
1020         glBegin(GL_QUADS);
1021         if (c<0)
1022                 glColor3f(1.0,1.0,1.0);
1023         else
1024                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
1025         glTexCoord2f(u1, v1); glVertex2f(xo, yo);
1026         glTexCoord2f(u2, v1); glVertex2f(xf, yo);
1027         glTexCoord2f(u2, v2); glVertex2f(xf, yf);
1028         glTexCoord2f(u1, v2); glVertex2f(xo, yf);
1029         glEnd();
1030 //      glDisABLE(ALPHA_TEST);
1031
1032         return 0;
1033 }
1034 bool ogl_ubitmapm(int x, int y,grs_bitmap *bm){
1035         return ogl_ubitmapm_c(x,y,bm,-1);
1036 //      return ogl_ubitblt(bm->bm_w,bm->bm_h,x,y,0,0,bm,NULL);
1037 }
1038 #if 0
1039 //also upsidedown, currently.
1040 bool ogl_ubitblt(int w,int h,int dx,int dy, int sx, int sy, grs_bitmap * src, grs_bitmap * dest)
1041 {
1042         GLfloat xo,yo;//,xs,ys;
1043         glmprintf((0,"ogl_ubitblt(w=%i,h=%i,dx=%i,dy=%i,sx=%i,sy=%i,src=%p,dest=%p\n",w,h, dx, dy,sx, sy,  src,dest));
1044
1045         dx+=dest->bm_x;
1046         dy+=dest->bm_y;
1047
1048         xo=dx/(float)last_width;
1049 //      xo=dx/(float)grd_curscreen->sc_w;
1050 //      xs=w/(float)last_width;
1051         //yo=1.0-dy/(float)last_height;
1052         yo=1.0-(dy+h)/(float)last_height;
1053 //      ys=h/(float)last_height;
1054
1055 //      OGL_ENABLE(TEXTURE_2D);
1056
1057         OGL_DISABLE(TEXTURE_2D);
1058         glRasterPos2f(xo,yo);
1059         ogl_filltexbuf(src->bm_data,texbuf,src->bm_w,w,h,sx,sy,w,h,GL_RGBA);
1060         glDrawPixels(w,h,GL_RGBA,GL_UNSIGNED_BYTE,texbuf);
1061         glRasterPos2f(0,0);
1062
1063         return 0;
1064 }
1065 #else
1066 bool ogl_ubitblt_i(int dw,int dh,int dx,int dy, int sw, int sh, int sx, int sy, grs_bitmap * src, grs_bitmap * dest)
1067 {
1068         GLfloat xo,yo,xs,ys;
1069         GLfloat u1,v1;//,u2,v2;
1070         ogl_texture tex;
1071 //      unsigned char *oldpal;
1072         r_ubitbltc++;
1073
1074         ogl_init_texture(&tex);
1075         tex.w=sw;tex.h=sh;
1076         tex.prio=0.0;tex.wantmip=0;
1077         tex.lw=src->bm_rowsize;
1078
1079 /*      if (w==src->bm_w && sx==0){
1080                 u1=0;u2=src->glu;
1081         }else{
1082                 u1=sx/(float)src->bm_w*src->glu;
1083                 u2=w/(float)src->bm_w*src->glu+u1;
1084         }
1085         if (h==src->bm_h && sy==0){
1086                 v1=0;v2=src->glv;
1087         }else{
1088                 v1=sy/(float)src->bm_h*src->glv;
1089                 v2=h/(float)src->bm_h*src->glv+v1;
1090         }*/
1091         u1=v1=0;
1092
1093         dx+=dest->bm_x;
1094         dy+=dest->bm_y;
1095         xo=dx/(float)last_width;
1096         xs=dw/(float)last_width;
1097         yo=1.0-dy/(float)last_height;
1098         ys=dh/(float)last_height;
1099
1100         OGL_ENABLE(TEXTURE_2D);
1101
1102 //      oldpal=ogl_pal;
1103         ogl_pal=gr_current_pal;
1104         ogl_loadtexture(src->bm_data,sx,sy,&tex);
1105 //      ogl_pal=oldpal;
1106         ogl_pal=gr_palette;
1107         OGL_BINDTEXTURE(tex.handle);
1108
1109         ogl_texwrap(&tex,GL_CLAMP);
1110
1111         glBegin(GL_QUADS);
1112         glColor3f(1.0,1.0,1.0);
1113         glTexCoord2f(u1, v1); glVertex2f(xo, yo);
1114         glTexCoord2f(tex.u, v1); glVertex2f(xo+xs, yo);
1115         glTexCoord2f(tex.u, tex.v); glVertex2f(xo+xs, yo-ys);
1116         glTexCoord2f(u1, tex.v); glVertex2f(xo, yo-ys);
1117         glEnd();
1118         ogl_freetexture(&tex);
1119         return 0;
1120 }
1121 bool ogl_ubitblt(int w,int h,int dx,int dy, int sx, int sy, grs_bitmap * src, grs_bitmap * dest){
1122         return ogl_ubitblt_i(w,h,dx,dy,w,h,sx,sy,src,dest);
1123 }
1124 #endif
1125 bool ogl_ubitblt_tolinear(int w,int h,int dx,int dy, int sx, int sy, grs_bitmap * src, grs_bitmap * dest){
1126 #if 1
1127         unsigned char *d,*s;
1128         int i,j;
1129         int w1,h1;
1130 //      w1=w;h1=h;
1131         w1=grd_curscreen->sc_w;h1=grd_curscreen->sc_h;
1132         if (w1*h1*3>OGLTEXBUFSIZE)
1133                 Error("ogl_ubitblt_tolinear: screen res larger than OGLTEXBUFSIZE\n");
1134
1135         if (ogl_readpixels_ok>0){
1136                 OGL_DISABLE(TEXTURE_2D);
1137                 glReadBuffer(GL_FRONT);
1138                 glReadPixels(0,0,w1,h1,GL_RGB,GL_UNSIGNED_BYTE,texbuf);
1139 //              glReadPixels(sx,grd_curscreen->sc_h-(sy+h),w,h,GL_RGB,GL_UNSIGNED_BYTE,texbuf);
1140 //              glReadPixels(sx,sy,w+sx,h+sy,GL_RGB,GL_UNSIGNED_BYTE,texbuf);
1141         }else
1142                 memset(texbuf,0,w1*h1*3);
1143         sx+=src->bm_x;
1144         sy+=src->bm_y;
1145         for (i=0;i<h;i++){
1146                 d=dest->bm_data+dx+(dy+i)*dest->bm_rowsize;
1147                 s=texbuf+((h1-(i+sy+1))*w1+sx)*3;
1148                 for (j=0;j<w;j++){
1149                         *d=gr_find_closest_color(s[0]/4,s[1]/4,s[2]/4);
1150                         s+=3;
1151                         d++;
1152                 }
1153         }
1154 #else
1155         int i,j,c=0;
1156         unsigned char *d,*s,*e;
1157         if (w*h*3>OGLTEXBUFSIZE)
1158                 Error("ogl_ubitblt_tolinear: size larger than OGLTEXBUFSIZE\n");
1159         sx+=src->bm_x;
1160         sy+=src->bm_y;
1161 #if 1//also seems to cause a mess.  need to look into it a bit more..
1162         if (ogl_readpixels_ok>0){
1163                 OGL_DISABLE(TEXTURE_2D);
1164                 glReadBuffer(GL_FRONT);
1165 //              glReadPixels(0,0,w,h,GL_RGB,GL_UNSIGNED_BYTE,texbuf);
1166                 glReadPixels(sx,grd_curscreen->sc_h-(sy+h),w,h,GL_RGB,GL_UNSIGNED_BYTE,texbuf);
1167         }else
1168 #endif
1169                 memset(texbuf,0,w*h*3);
1170 //      d=dest->bm_data+dx+(dy+i)*dest->bm_rowsize;
1171         d=dest->bm_data+dx+dy*dest->bm_rowsize;
1172         for (i=0;i<h;i++){
1173                 s=texbuf+w*(h-(i+1))*3;
1174 //              s=texbuf+w*i*3;
1175                 if (s<texbuf){Error("blah1\n");}
1176                 if (d<dest->bm_data){Error("blah3\n");}
1177 //              d=dest->bm_data+(i*dest->bm_rowsize);
1178
1179                 e=d;
1180                 for (j=0;j<w;j++){
1181                         if (s>texbuf+w*h*3-3){Error("blah2\n");}
1182                         if (d>dest->bm_data+dest->bm_rowsize*(h+dy)+dx  ){Error("blah4\n");}
1183                         *d=gr_find_closest_color(s[0]/4,s[1]/4,s[2]/4);
1184                         s+=3;
1185                         d++;
1186                         c++;
1187                 }
1188                 d=e;
1189                 d+=dest->bm_rowsize;
1190         }
1191         glmprintf((0,"c=%i w*h=%i\n",c,w*h));
1192 #endif
1193         return 0;
1194 }
1195
1196 bool ogl_ubitblt_copy(int w,int h,int dx,int dy, int sx, int sy, grs_bitmap * src, grs_bitmap * dest){
1197 #if 0 //just seems to cause a mess.
1198         GLfloat xo,yo;//,xs,ys;
1199
1200         dx+=dest->bm_x;
1201         dy+=dest->bm_y;
1202
1203 //      xo=dx/(float)last_width;
1204         xo=dx/(float)grd_curscreen->sc_w;
1205 //      yo=1.0-(dy+h)/(float)last_height;
1206         yo=1.0-(dy+h)/(float)grd_curscreen->sc_h;
1207         sx+=src->bm_x;
1208         sy+=src->bm_y;
1209         OGL_DISABLE(TEXTURE_2D);
1210         glReadBuffer(GL_FRONT);
1211         glRasterPos2f(xo,yo);
1212 //      glReadPixels(0,0,w,h,GL_RGB,GL_UNSIGNED_BYTE,texbuf);
1213         glCopyPixels(sx,grd_curscreen->sc_h-(sy+h),w,h,GL_COLOR);
1214         glRasterPos2f(0,0);
1215 #endif
1216         return 0;
1217 }
1218
1219 grs_canvas *offscreen_save_canv = NULL, *offscreen_canv = NULL;
1220
1221 void ogl_start_offscreen_render(int x, int y, int w, int h)
1222 {
1223         if (offscreen_canv)
1224                 Error("ogl_start_offscreen_render: offscreen_canv!=NULL");
1225         offscreen_save_canv = grd_curcanv;
1226         offscreen_canv = gr_create_sub_canvas(grd_curcanv, x, y, w, h);
1227         gr_set_current_canvas(offscreen_canv);
1228         glDrawBuffer(GL_BACK);
1229 }
1230 void ogl_end_offscreen_render(void)
1231 {
1232         int y;
1233
1234         if (!offscreen_canv)
1235                 Error("ogl_end_offscreen_render: no offscreen_canv");
1236
1237         glDrawBuffer(GL_FRONT);
1238         glReadBuffer(GL_BACK);
1239         OGL_DISABLE(TEXTURE_2D);
1240
1241         y = last_height - offscreen_canv->cv_bitmap.bm_y - offscreen_canv->cv_bitmap.bm_h;
1242         glRasterPos2f(offscreen_canv->cv_bitmap.bm_x/(float)last_width, y/(float)last_height);
1243         glCopyPixels(offscreen_canv->cv_bitmap.bm_x, y,
1244                      offscreen_canv->cv_bitmap.bm_w,
1245                  offscreen_canv->cv_bitmap.bm_h, GL_COLOR);
1246
1247         gr_free_sub_canvas(offscreen_canv);
1248         gr_set_current_canvas(offscreen_save_canv);
1249         offscreen_canv=NULL;
1250 }
1251
1252 void ogl_start_frame(void){
1253         r_polyc=0;r_tpolyc=0;r_bitmapc=0;r_ubitmapc=0;r_ubitbltc=0;r_upixelc=0;
1254 //      gl_badtexture=500;
1255
1256         OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,Canvas_width,Canvas_height);
1257         glClearColor(0.0, 0.0, 0.0, 0.0);
1258 //      glEnable(GL_ALPHA_TEST);
1259 //      glAlphaFunc(GL_GREATER,0.01);
1260         glShadeModel(GL_SMOOTH);
1261         glMatrixMode(GL_PROJECTION);
1262         glLoadIdentity();//clear matrix
1263         //gluPerspective(90.0,(GLfloat)(grd_curscreen->sc_w*3)/(GLfloat)(grd_curscreen->sc_h*4),1.0,1000000.0);
1264         //gluPerspective(90.0,(GLfloat)(grd_curscreen->sc_w*3)/(GLfloat)(grd_curscreen->sc_h*4),0.01,1000000.0);
1265         gluPerspective(90.0,1.0,0.01,1000000.0);
1266         //gluPerspective(90.0,(GLfloat)(Canvas_width*3)/(GLfloat)(Canvas_height*4),0.01,1000000.0);
1267 //      gluPerspective(75.0,(GLfloat)Canvas_width/(GLfloat)Canvas_height,1.0,1000000.0);
1268         glMatrixMode(GL_MODELVIEW);
1269         glLoadIdentity();//clear matrix
1270         glEnable(GL_BLEND);
1271         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
1272 //      glDisABLE(DITHER);
1273 //      glScalef(1.0,1.0,-1.0);
1274 //      glScalef(1.0,1.0,-1.0);
1275 //      glPushMatrix();
1276
1277 //      glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1278 //      OGL_TEXENV(GL_TEXTURE_ENV_MODE,GL_MODULATE);
1279 //      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_texmagfilt);
1280 //      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_texminfilt);
1281 //      OGL_TEXPARAM(GL_TEXTURE_MAG_FILTER,GL_texmagfilt);
1282 //      OGL_TEXPARAM(GL_TEXTURE_MIN_FILTER,GL_texminfilt);
1283 //      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
1284 //      glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
1285 }
1286 #ifndef NMONO
1287 void merge_textures_stats(void);
1288 #endif
1289 void ogl_end_frame(void){
1290 //      OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,);
1291         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
1292 #ifndef NMONO
1293 //      merge_textures_stats();
1294 //      ogl_texture_stats();
1295 #endif
1296 //      glViewport(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
1297         glMatrixMode(GL_PROJECTION);
1298         glLoadIdentity();//clear matrix
1299         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
1300         glMatrixMode(GL_MODELVIEW);
1301         glLoadIdentity();//clear matrix
1302 //      glDisABLE(BLEND);
1303         //glDisABLE(ALPHA_TEST);
1304         //gluPerspective(90.0,(GLfloat)(grd_curscreen->sc_w*3)/(GLfloat)(grd_curscreen->sc_h*4),1.0,1000000.0);
1305 //      ogl_swap_buffers();//platform specific code
1306 //      glClear(GL_COLOR_BUFFER_BIT);
1307 }
1308 void ogl_swap_buffers(void){
1309         ogl_clean_texture_cache();
1310         if (gr_renderstats){
1311                 gr_printf(5,GAME_FONT->ft_h*13+3*13,"%i flat %i tex %i sprites %i bitmaps",r_polyc,r_tpolyc,r_bitmapc,r_ubitmapc);
1312 //      glmprintf((0,"ogl_end_frame: %i polys, %i tmaps, %i sprites, %i bitmaps, %i bitblts, %i pixels\n",r_polyc,r_tpolyc,r_bitmapc,r_ubitmapc,r_ubitbltc,r_upixelc));//we need to do it here because some things get drawn after end_frame
1313         }
1314         ogl_do_palfx();
1315         ogl_swap_buffers_internal();
1316         glClear(GL_COLOR_BUFFER_BIT);
1317 }
1318
1319 int tex_format_supported(int iformat,int format){
1320         switch (iformat){
1321                 case GL_INTENSITY4:
1322                         if (!ogl_intensity4_ok) return 0; break;
1323                 case GL_LUMINANCE4_ALPHA4:
1324                         if (!ogl_luminance4_alpha4_ok) return 0; break;
1325                 case GL_RGBA2:
1326                         if (!ogl_rgba2_ok) return 0; break;
1327         }
1328         if (ogl_gettexlevelparam_ok){
1329                 GLint internalFormat;
1330                 glTexImage2D(GL_PROXY_TEXTURE_2D, 0, iformat, 64, 64, 0,
1331                                 format, GL_UNSIGNED_BYTE, texbuf);//NULL?
1332                 glGetTexLevelParameteriv(GL_PROXY_TEXTURE_2D, 0,
1333                                 GL_TEXTURE_INTERNAL_FORMAT,
1334                                 &internalFormat);
1335                 return (internalFormat==iformat);
1336         }else
1337                 return 1;
1338 }
1339
1340 //little hack to find the largest or equal multiple of 2 for a given number
1341 int pow2ize(int x){
1342         int i;
1343         for (i=2;i<=4096;i*=2)
1344                 if (x<=i) return i;
1345         return i;
1346 }
1347
1348 //GLubyte texbuf[512*512*4];
1349 GLubyte texbuf[OGLTEXBUFSIZE];
1350 void ogl_filltexbuf(unsigned char *data,GLubyte *texp,int truewidth,int width,int height,int dxo,int dyo,int twidth,int theight,int type)
1351 {
1352 //      GLushort *tex=(GLushort *)texp;
1353         int x,y,c,i;
1354         if (twidth*theight*4>sizeof(texbuf))//shouldn't happen, descent never uses textures that big.
1355                 Error("texture toobig %i %i",twidth,theight);
1356
1357         i=0;
1358         for (y=0;y<theight;y++){
1359                 i=dxo+truewidth*(y+dyo);
1360                 for (x=0;x<twidth;x++){
1361                         if (x<width && y<height)
1362                                 c=data[i++];
1363                         else
1364                                 c=255;//fill the pad space with transparancy
1365                         if (c==255){
1366                                 switch (type){
1367                                         case GL_LUMINANCE:
1368                                                 (*(texp++))=0;
1369                                                 break;
1370                                         case GL_LUMINANCE_ALPHA:
1371                                                 (*(texp++))=0;
1372                                                 (*(texp++))=0;
1373                                                 break;
1374                                         case GL_RGBA:
1375                                                 (*(texp++))=0;
1376                                                 (*(texp++))=0;
1377                                                 (*(texp++))=0;
1378                                                 (*(texp++))=0;//transparent pixel
1379                                                 break;
1380                                 }
1381 //                              (*(tex++))=0;
1382                         }else{
1383                                 switch (type){
1384                                         case GL_LUMINANCE://these could prolly be done to make the intensity based upon the intensity of the resulting color, but its not needed for anything (yet?) so no point. :)
1385                                                 (*(texp++))=255;
1386                                                 break;
1387                                         case GL_LUMINANCE_ALPHA:
1388                                                 (*(texp++))=255;
1389                                                 (*(texp++))=255;
1390                                                 break;
1391                                         case GL_RGBA:
1392                                                 //(*(texp++))=gr_palette[c*3]*4;
1393                                                 //(*(texp++))=gr_palette[c*3+1]*4;
1394                                                 //(*(texp++))=gr_palette[c*3+2]*4;
1395                                                 (*(texp++))=ogl_pal[c*3]*4;
1396                                                 (*(texp++))=ogl_pal[c*3+1]*4;
1397                                                 (*(texp++))=ogl_pal[c*3+2]*4;
1398                                                 (*(texp++))=255;//not transparent
1399                                                 //                              (*(tex++))=(ogl_pal[c*3]>>1) + ((ogl_pal[c*3+1]>>1)<<5) + ((ogl_pal[c*3+2]>>1)<<10) + (1<<15);
1400                                                 break;
1401                                 }
1402                         }
1403                 }
1404         }
1405 }
1406 int tex_format_verify(ogl_texture *tex){
1407         while (!tex_format_supported(tex->internalformat,tex->format)){
1408                 glmprintf((0,"tex format %x not supported",tex->internalformat));
1409                 switch (tex->internalformat){
1410                         case GL_INTENSITY4:
1411                                 if (ogl_luminance4_alpha4_ok){
1412                                         tex->internalformat=GL_LUMINANCE4_ALPHA4;
1413                                         tex->format=GL_LUMINANCE_ALPHA;
1414                                         break;
1415                                 }//note how it will fall through here if the statement is false
1416                         case GL_LUMINANCE4_ALPHA4:
1417                                 if (ogl_rgba2_ok){
1418                                         tex->internalformat=GL_RGBA2;
1419                                         tex->format=GL_RGBA;
1420                                         break;
1421                                 }//note how it will fall through here if the statement is false
1422                         case GL_RGBA2:
1423                                 tex->internalformat=ogl_rgba_format;
1424                                 tex->format=GL_RGBA;
1425                                 break;
1426                         default:
1427                                 mprintf((0,"...no tex format to fall back on\n"));
1428                                 return 1;
1429                 }
1430                 glmprintf((0,"...falling back to %x\n",tex->internalformat));
1431         }
1432         return 0;
1433 }
1434 void tex_set_size1(ogl_texture *tex,int dbits,int bits,int w, int h){
1435         int u;
1436         if (tex->tw!=w || tex->th!=h){
1437                 u=(tex->w/(float)tex->tw*w) * (tex->h/(float)tex->th*h);
1438                 glmprintf((0,"shrunken texture?\n"));
1439         }else
1440                 u=tex->w*tex->h;
1441         if (bits<=0){//the beta nvidia GLX server. doesn't ever return any bit sizes, so just use some assumptions.
1442                 tex->bytes=((float)w*h*dbits)/8.0;
1443                 tex->bytesu=((float)u*dbits)/8.0;
1444         }else{
1445                 tex->bytes=((float)w*h*bits)/8.0;
1446                 tex->bytesu=((float)u*bits)/8.0;
1447         }
1448         glmprintf((0,"tex_set_size1: %ix%i, %ib(%i) %iB\n",w,h,bits,dbits,tex->bytes));
1449 }
1450 void tex_set_size(ogl_texture *tex){
1451         GLint w,h;
1452         int bi=16,a=0;
1453         if (ogl_gettexlevelparam_ok){
1454                 GLint t;
1455                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_WIDTH,&w);
1456                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_HEIGHT,&h);
1457                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_LUMINANCE_SIZE,&t);a+=t;
1458                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_INTENSITY_SIZE,&t);a+=t;
1459                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_RED_SIZE,&t);a+=t;
1460                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_GREEN_SIZE,&t);a+=t;
1461                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_BLUE_SIZE,&t);a+=t;
1462                 glGetTexLevelParameteriv(GL_TEXTURE_2D,0,GL_TEXTURE_ALPHA_SIZE,&t);a+=t;
1463         }else{
1464                 w=tex->tw;
1465                 h=tex->th;
1466         }
1467         switch (tex->format){
1468                 case GL_LUMINANCE:
1469                         bi=8;
1470                         break;
1471                 case GL_LUMINANCE_ALPHA:
1472                         bi=8;
1473                         break;
1474                 case GL_RGBA:
1475                         bi=16;
1476                         break;
1477                 default:
1478                         Error("tex_set_size unknown texformat\n");
1479                         break;
1480         }
1481         tex_set_size1(tex,bi,a,w,h);
1482 }
1483 //loads a palettized bitmap into a ogl RGBA texture.
1484 //Sizes and pads dimensions to multiples of 2 if necessary.
1485 //In theory this could be a problem for repeating textures, but all real
1486 //textures (not sprites, etc) in descent are 64x64, so we are ok.
1487 //stores OpenGL textured id in *texid and u/v values required to get only the real data in *u/*v
1488 void ogl_loadtexture(unsigned char * data, int dxo,int dyo, ogl_texture *tex)
1489 {
1490 //void ogl_loadtexture(unsigned char * data, int width, int height,int dxo,int dyo, int *texid,float *u,float *v,char domipmap,float prio){
1491 //      int internalformat=GL_RGBA;
1492 //      int format=GL_RGBA;
1493         //int filltype=0;
1494         tex->tw=pow2ize(tex->w);tex->th=pow2ize(tex->h);//calculate smallest texture size that can accomodate us (must be multiples of 2)
1495 //      tex->tw=tex->w;tex->th=tex->h;//feeling lucky?
1496
1497         if(gr_badtexture>0) return;
1498
1499 #if !(defined(__APPLE__) && defined(__MACH__))
1500         // always fails on OS X, but textures work fine!
1501         if (tex_format_verify(tex))
1502                 return;
1503 #endif
1504
1505         //calculate u/v values that would make the resulting texture correctly sized
1506         tex->u=(float)tex->w/(float)tex->tw;
1507         tex->v=(float)tex->h/(float)tex->th;
1508
1509         //      if (width!=twidth || height!=theight)
1510         //              glmprintf((0,"sizing %ix%i texture up to %ix%i\n",width,height,twidth,theight));
1511         ogl_filltexbuf(data,texbuf,tex->lw,tex->w,tex->h,dxo,dyo,tex->tw,tex->th,tex->format);
1512
1513         // Generate OpenGL texture IDs.
1514         glGenTextures(1, &tex->handle);
1515
1516         //set priority
1517         glPrioritizeTextures(1,&tex->handle,&tex->prio);
1518
1519         // Give our data to OpenGL.
1520
1521         OGL_BINDTEXTURE(tex->handle);
1522
1523         glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
1524         if (tex->wantmip){
1525                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_texmagfilt);
1526                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_texminfilt);
1527                 if (ogl_ext_texture_filter_anisotropic_ok && GL_texanisofilt)
1528                         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, GL_texanisofilt);
1529         }
1530         else
1531         {
1532                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
1533                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
1534         }
1535 //      domipmap=0;//mipmaps aren't used in GL_NEAREST anyway, and making the mipmaps is pretty slow
1536         //however, if texturing mode becomes an ingame option, they would need to be made regardless, so it could switch to them later.  OTOH, texturing mode could just be made a command line arg.
1537
1538         if (tex->wantmip && GL_needmipmaps)
1539                 gluBuild2DMipmaps( GL_TEXTURE_2D, tex->internalformat, tex->tw,
1540                                 tex->th, tex->format, GL_UNSIGNED_BYTE, texbuf);
1541         else
1542                 glTexImage2D(GL_TEXTURE_2D, 0, tex->internalformat,
1543                         tex->tw, tex->th, 0, tex->format, // RGBA textures.
1544                         GL_UNSIGNED_BYTE, // imageData is a GLubyte pointer.
1545                         texbuf);
1546
1547         tex_set_size(tex);
1548
1549         r_texcount++;
1550         glmprintf((0,"ogl_loadtexture(%p,%i,%i,%ix%i,%p):%i u=%f v=%f b=%i bu=%i (%i)\n",data,tex->tw,tex->th,dxo,dyo,tex,tex->handle,tex->u,tex->v,tex->bytes,tex->bytesu,r_texcount));
1551
1552 }
1553
1554 unsigned char decodebuf[512*512];
1555
1556 void ogl_loadbmtexture_m(grs_bitmap *bm,int domipmap)
1557 {
1558         unsigned char *buf;
1559         while (bm->bm_parent)
1560                 bm=bm->bm_parent;
1561         buf=bm->bm_data;
1562         if (bm->gltexture==NULL){
1563                 ogl_init_texture(bm->gltexture=ogl_get_free_texture());
1564                 bm->gltexture->lw=bm->bm_w;
1565                 bm->gltexture->w=bm->bm_w;
1566                 bm->gltexture->h=bm->bm_h;
1567                 bm->gltexture->wantmip=domipmap;
1568         }
1569         else {
1570                 if (bm->gltexture->handle>0)
1571                         return;
1572                 if (bm->gltexture->w==0){
1573                         bm->gltexture->lw=bm->bm_w;
1574                         bm->gltexture->w=bm->bm_w;
1575                         bm->gltexture->h=bm->bm_h;
1576                 }
1577         }
1578         if (bm->bm_flags & BM_FLAG_RLE){
1579                 unsigned char * dbits;
1580                 unsigned char * sbits;
1581                 int i, data_offset;
1582
1583                 data_offset = 1;
1584                 if (bm->bm_flags & BM_FLAG_RLE_BIG)
1585                         data_offset = 2;
1586
1587                 sbits = &bm->bm_data[4 + (bm->bm_h * data_offset)];
1588                 dbits = decodebuf;
1589
1590                 for (i=0; i < bm->bm_h; i++ )    {
1591                         gr_rle_decode(sbits,dbits);
1592                         if ( bm->bm_flags & BM_FLAG_RLE_BIG )
1593                                 sbits += (int)INTEL_SHORT(*((short *)&(bm->bm_data[4+(i*data_offset)])));
1594                         else
1595                                 sbits += (int)bm->bm_data[4+i];
1596                         dbits += bm->bm_w;
1597                 }
1598                 buf=decodebuf;
1599         }
1600         ogl_loadtexture(buf,0,0,bm->gltexture);
1601 }
1602
1603 void ogl_loadbmtexture(grs_bitmap *bm)
1604 {
1605         ogl_loadbmtexture_m(bm,1);
1606 }
1607
1608 void ogl_freetexture(ogl_texture *gltexture)
1609 {
1610         if (gltexture->handle>0) {
1611                 r_texcount--;
1612                 glmprintf((0,"ogl_freetexture(%p):%i (last rend %is) (%i left)\n",gltexture,gltexture->handle,(GameTime-gltexture->lastrend)/f1_0,r_texcount));
1613                 glDeleteTextures( 1, &gltexture->handle );
1614 //              gltexture->handle=0;
1615                 ogl_init_texture(gltexture);
1616         }
1617 }
1618 void ogl_freebmtexture(grs_bitmap *bm){
1619         if (bm->gltexture){
1620                 ogl_freetexture(bm->gltexture);
1621                 bm->gltexture=NULL;
1622 //              r_texcount--;
1623 //              glmprintf((0,"ogl_freebmtexture(%p,%p):%i (%i left)\n",bm->bm_data,&bm->gltexture,bm->gltexture,r_texcount));
1624 //              glDeleteTextures( 1, &bm->gltexture );
1625 //              bm->gltexture=-1;
1626         }
1627 }