arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.31 2004-05-22 23:06:58 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;
 166 #ifdef GL_NV_register_combiners
 167         int nv_register_combiners = -1;
 168 #endif
 169         float anisotropic_max = 0;
 170
 171         gl_vendor=glGetString(GL_VENDOR);
 172         gl_renderer=glGetString(GL_RENDERER);
 173         gl_version=glGetString(GL_VERSION);
 174         gl_extensions=glGetString(GL_EXTENSIONS);
 175
 176         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 177
 178         ogl_intensity4_ok = 1;
 179         ogl_luminance4_alpha4_ok = 1;
 180         ogl_rgba2_ok = 1;
 181         ogl_gettexlevelparam_ok = 1;
 182         ogl_setgammaramp_ok = 1;
 183
 184 #ifdef WGL_VIDEO
 185         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 186         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 187         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 188         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 189         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 190         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 191         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 192         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 193         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 194 #endif
 195
 196 #ifdef GL_ARB_multitexture
 197         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 198         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 199 #endif
 200 #ifdef GL_SGIS_multitexture
 201         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 202         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 203 #endif
 204         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 205 #ifdef GL_NV_register_combiners
 206         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 207 #endif
 208
 209         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 210         if (ogl_ext_texture_filter_anisotropic_ok)
 211                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 212
 213 #ifdef GL_EXT_paletted_texture
 214         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 215         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 216 #endif
 217         //add driver specific hacks here.  whee.
 218         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){
 219                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 220                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 221                 ogl_gettexlevelparam_ok=0;//returns random data..
 222         }
 223         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 224                 //displays garbage. reported by
 225                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 226                 //  orulz (Matrox G200)
 227                 ogl_intensity4_ok=0;
 228         }
 229
 230         //allow overriding of stuff.
 231 #ifdef GL_ARB_multitexture
 232         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 233                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 234         }
 235         if (ogl_arb_multitexture_ok)
 236                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 237 #endif
 238 #ifdef GL_SGIS_multitexture
 239         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 240                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 241         }
 242         if (ogl_sgis_multitexture_ok)
 243                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 244 #endif
 245 #ifdef GL_NV_register_combiners
 246         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 247         {
 248                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 249         }
 250         if (ogl_nv_register_combiners_ok)
 251                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 252 #endif
 253 #ifdef GL_EXT_paletted_texture
 254         if ((t = FindArg("-gl_paletted_texture_ok")))
 255         {
 256                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 257         }
 258         if ((t = FindArg("-gl_shared_palette_ok")))
 259         {
 260                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 261         }
 262         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 263         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);
 264 #endif
 265         if ((t=FindArg("-gl_intensity4_ok"))){
 266                 ogl_intensity4_ok=atoi(Args[t+1]);
 267         }
 268         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 269                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 270         }
 271         if ((t=FindArg("-gl_rgba2_ok"))){
 272                 ogl_rgba2_ok=atoi(Args[t+1]);
 273         }
 274         if ((t=FindArg("-gl_readpixels_ok"))){
 275                 ogl_readpixels_ok=atoi(Args[t+1]);
 276         }
 277         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 278                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 279         }
 280         if ((t=FindArg("-gl_setgammaramp_ok")))
 281         {
 282                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 283         }
 284
 285         con_printf(CON_VERBOSE, "gl_arb_multitexture:%i(%i units) gl_sgis_multitexture:%i(%i units) gl_nv_texture_env_combine4:%i\n", ogl_arb_multitexture_ok, arb_max_textures, ogl_sgis_multitexture_ok, sgi_max_textures, ogl_nv_texture_env_combine4_ok);
 286 #ifdef GL_NV_register_combiners
 287         con_printf(CON_VERBOSE, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 288 #endif
 289         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);
 290 }
 291
 292
 293 int gr_check_mode(u_int32_t mode)
 294 {
 295         int w, h;
 296
 297         w = SM_W(mode);
 298         h = SM_H(mode);
 299         return ogl_check_mode(w, h); // platform specific code
 300 }
 301
 302
 303 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 304
 305 int gr_set_mode(u_int32_t mode)
 306 {
 307         unsigned int w,h;
 308         char *gr_bm_data;
 309
 310 #ifdef NOGRAPH
 311 return 0;
 312 #endif
 313 //      mode=0;
 314         if (mode<=0)
 315                 return 0;
 316
 317         w=SM_W(mode);
 318         h=SM_H(mode);
 319         VGA_current_mode = mode;
 320
 321         //if (screen != NULL) gr_palette_clear();
 322
 323 //      ogl_init_state();
 324
 325         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 326         memset( grd_curscreen, 0, sizeof(grs_screen));
 327         grd_curscreen->sc_mode = mode;
 328         grd_curscreen->sc_w = w;
 329         grd_curscreen->sc_h = h;
 330         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 331         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 332         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 333         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 334         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 335         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 336         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 337         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 338         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 339 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 340         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 341         gr_set_current_canvas(NULL);
 342         //gr_enable_default_palette_loading();
 343
 344         ogl_init_window(w,h);//platform specific code
 345
 346         ogl_get_verinfo();
 347
 348         OGL_VIEWPORT(0,0,w,h);
 349
 350         ogl_set_screen_mode();
 351
 352 //      gamefont_choose_game_font(w,h);
 353
 354         return 0;
 355 }
 356
 357 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 358 int ogl_atotexfilti(char *a,int min){
 359         GLstrcmptestr(a,NEAREST);
 360         GLstrcmptestr(a,LINEAR);
 361         if (min){//mipmaps are valid only for the min filter
 362                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 363                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 364                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 365                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 366         }
 367         Error("unknown/invalid texture filter %s\n",a);
 368 //      return GL_NEAREST;
 369 }
 370 int ogl_testneedmipmaps(int i){
 371         switch (i){
 372                 case GL_NEAREST:
 373                 case GL_LINEAR:
 374                         return 0;
 375                 case GL_NEAREST_MIPMAP_NEAREST:
 376                 case GL_NEAREST_MIPMAP_LINEAR:
 377                 case GL_LINEAR_MIPMAP_NEAREST:
 378                 case GL_LINEAR_MIPMAP_LINEAR:
 379                         return 1;
 380         }
 381         Error("unknown texture filter %x\n",i);
 382 //      return -1;
 383 }
 384 #ifdef OGL_RUNTIME_LOAD
 385 #ifdef _WIN32
 386 char *OglLibPath="opengl32.dll";
 387 #endif
 388 #ifdef __unix__
 389 char *OglLibPath="libGL.so";
 390 #endif
 391
 392 int ogl_rt_loaded=0;
 393 int ogl_init_load_library(void)
 394 {
 395         int retcode=0;
 396         if (!ogl_rt_loaded){
 397                 int t;
 398                 if ((t=FindArg("-gl_library")))
 399                         OglLibPath=Args[t+1];
 400
 401                 retcode = OpenGL_LoadLibrary(true);
 402                 if(retcode)
 403                 {
 404                         mprintf((0,"Opengl loaded ok\n"));
 405
 406                         if(!glEnd)
 407                         {
 408                                 Error("Opengl: Functions not imported\n");
 409                         }
 410                 }else{
 411                         Error("Opengl: error loading %s\n",OglLibPath);
 412                 }
 413                 ogl_rt_loaded=1;
 414         }
 415         return retcode;
 416 }
 417 #endif
 418
 419 int gr_init()
 420 {
 421         int mode = SM(640,480);
 422         int retcode, t, glt = 0;
 423
 424         // Only do this function once!
 425         if (gr_installed==1)
 426                 return -1;
 427
 428
 429 #ifdef OGL_RUNTIME_LOAD
 430         ogl_init_load_library();
 431 #endif
 432
 433 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 434         if (FindArg("-gl_voodoo")){
 435                 ogl_voodoohack=1;
 436                 gr_toggle_fullscreen();
 437         }
 438         if (FindArg("-fullscreen"))
 439                 gr_toggle_fullscreen();
 440 #endif
 441         if ((glt=FindArg("-gl_alttexmerge")))
 442                 ogl_alttexmerge=1;
 443         if ((t=FindArg("-gl_stdtexmerge")))
 444                 if (t>=glt)//allow overriding of earlier args
 445                         ogl_alttexmerge=0;
 446
 447         if ((glt = FindArg("-gl_16bittextures")))
 448         {
 449                 ogl_rgba_internalformat = GL_RGB5_A1;
 450                 ogl_rgb_internalformat = GL_RGB5;
 451         }
 452
 453         if ((glt=FindArg("-gl_mipmap"))){
 454                 GL_texmagfilt=GL_LINEAR;
 455                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 456         }
 457         if ((glt=FindArg("-gl_trilinear")))
 458         {
 459                 GL_texmagfilt = GL_LINEAR;
 460                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 461         }
 462         if ((t=FindArg("-gl_simple"))){
 463                 if (t>=glt){//allow overriding of earlier args
 464                         glt=t;
 465                         GL_texmagfilt=GL_NEAREST;
 466                         GL_texminfilt=GL_NEAREST;
 467                 }
 468         }
 469         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 470                 if (t>=glt)//allow overriding of earlier args
 471                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 472         }
 473         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 474                 if (t>=glt)//allow overriding of earlier args
 475                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 476         }
 477         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 478
 479         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 480         {
 481                 GL_texanisofilt=atof(Args[t + 1]);
 482         }
 483
 484         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 485
 486
 487         if ((t=FindArg("-gl_vidmem"))){
 488                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 489         }
 490         if ((t=FindArg("-gl_reticle"))){
 491                 gl_reticle=atoi(Args[t+1]);
 492         }
 493         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 494
 495         ogl_init();//platform specific initialization
 496
 497         ogl_init_texture_list_internal();
 498
 499         MALLOC( grd_curscreen,grs_screen,1 );
 500         memset( grd_curscreen, 0, sizeof(grs_screen));
 501         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 502
 503         // Set the mode.
 504         if ((retcode=gr_set_mode(mode)))
 505         {
 506                 return retcode;
 507         }
 508
 509         grd_curscreen->sc_canvas.cv_color = 0;
 510         grd_curscreen->sc_canvas.cv_drawmode = 0;
 511         grd_curscreen->sc_canvas.cv_font = NULL;
 512         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 513         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 514         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 515
 516         gr_installed = 1;
 517
 518         atexit(gr_close);
 519
 520         return 0;
 521 }
 522
 523 void gr_close()
 524 {
 525 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 526
 527         ogl_close();//platform specific code
 528         if (grd_curscreen){
 529                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 530                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 531                 d_free(grd_curscreen);
 532         }
 533 #ifdef OGL_RUNTIME_LOAD
 534         if (ogl_rt_loaded)
 535                 OpenGL_LoadLibrary(false);
 536 #endif
 537 }
 538 extern int r_upixelc;
 539 void ogl_upixelc(int x, int y, int c){
 540         r_upixelc++;
 541 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 542 //      if(Function_mode != FMODE_GAME){
 543 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 544 //      }else{
 545                 OGL_DISABLE(TEXTURE_2D);
 546                 glPointSize(1.0);
 547                 glBegin(GL_POINTS);
 548 //              glBegin(GL_LINES);
 549 //      ogl_pal=gr_current_pal;
 550                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 551 //      ogl_pal=gr_palette;
 552                 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);
 553 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 554                 glEnd();
 555 //      }
 556 }
 557 void ogl_urect(int left,int top,int right,int bot){
 558         GLfloat xo,yo,xf,yf;
 559         int c=COLOR;
 560
 561         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 562         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 563         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 564         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 565
 566         OGL_DISABLE(TEXTURE_2D);
 567         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 568         glBegin(GL_QUADS);
 569         glVertex2f(xo,yo);
 570         glVertex2f(xo,yf);
 571         glVertex2f(xf,yf);
 572         glVertex2f(xf,yo);
 573         glEnd();
 574 }
 575 void ogl_ulinec(int left,int top,int right,int bot,int c){
 576         GLfloat xo,yo,xf,yf;
 577
 578         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 579         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 580         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 581         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 582
 583         OGL_DISABLE(TEXTURE_2D);
 584         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 585         glBegin(GL_LINES);
 586         glVertex2f(xo,yo);
 587         glVertex2f(xf,yf);
 588         glEnd();
 589 }
 590
 591
 592 GLfloat last_r=0, last_g=0, last_b=0;
 593 int do_pal_step=0;
 594 void ogl_do_palfx(void){
 595 //      GLfloat r,g,b,a;
 596         OGL_DISABLE(TEXTURE_2D);
 597         if (gr_palette_faded_out){
 598 /*              glEnable(GL_BLEND);
 599                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 600                 glColor3f(0,0,0);
 601 //              r=g=b=0.0;a=1.0;
 602         }else{
 603                 if (do_pal_step){
 604                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 605                         glEnable(GL_BLEND);
 606                         glBlendFunc(GL_ONE,GL_ONE);
 607                         glColor3f(last_r,last_g,last_b);
 608 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 609                 }else
 610                         return;
 611         }
 612
 613
 614         glBegin(GL_QUADS);
 615         glVertex2f(0,0);
 616         glVertex2f(0,1);
 617         glVertex2f(1,1);
 618         glVertex2f(1,0);
 619         glEnd();
 620
 621         glEnable(GL_BLEND);
 622         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 623 }
 624
 625 void gr_palette_clear()
 626 {
 627         gr_palette_faded_out=1;
 628 }
 629
 630
 631 int ogl_brightness_ok = 0;
 632 int ogl_setgammaramp_ok = 1;
 633 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 634 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 635
 636 void gr_palette_step_up(int r, int g, int b)
 637 {
 638         if (gr_palette_faded_out)
 639                 return;
 640
 641         old_b_r = ogl_brightness_r;
 642         old_b_g = ogl_brightness_g;
 643         old_b_b = ogl_brightness_b;
 644
 645         ogl_brightness_r = max(r + gr_palette_gamma, 0);
 646         ogl_brightness_g = max(g + gr_palette_gamma, 0);
 647         ogl_brightness_b = max(b + gr_palette_gamma, 0);
 648
 649         if (ogl_setgammaramp_ok &&
 650             (old_b_r != ogl_brightness_r ||
 651              old_b_g != ogl_brightness_g ||
 652              old_b_b != ogl_brightness_b))
 653                 ogl_brightness_ok = !ogl_setbrightness_internal();
 654
 655         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 656         {
 657                 last_r = ogl_brightness_r / 63.0;
 658                 last_g = ogl_brightness_g / 63.0;
 659                 last_b = ogl_brightness_b / 63.0;
 660
 661                 do_pal_step = (r || g || b || gr_palette_gamma);
 662         }
 663         else
 664         {
 665                 do_pal_step = 0;
 666         }
 667 }
 668
 669 //added on 980913 by adb to fix palette problems
 670 // need a min without side effects...
 671 #undef min
 672 static inline int min(int x, int y) { return x < y ? x : y; }
 673 //end changes by adb
 674
 675 void gr_palette_load( ubyte *pal )
 676 {
 677  int i;//, j;
 678
 679  for (i=0; i<768; i++ ) {
 680      gr_current_pal[i] = pal[i];
 681      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 682  }
 683  //palette = screen->format->palette;
 684
 685  gr_palette_faded_out=0;
 686
 687         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 688
 689  init_computed_colors();
 690
 691         ogl_init_shared_palette();
 692 }
 693
 694
 695
 696 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 697 {
 698         gr_palette_faded_out=1;
 699         return 0;
 700 }
 701
 702
 703
 704 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 705 {
 706         gr_palette_faded_out=0;
 707         return 0;
 708 }
 709
 710
 711
 712 void gr_palette_read(ubyte * pal)
 713 {
 714         int i;
 715         for (i=0; i<768; i++ ) {
 716                 pal[i]=gr_current_pal[i];
 717                 if (pal[i] > 63) pal[i] = 63;
 718         }
 719 }
 720
 721 //writes out an uncompressed RGB .tga file
 722 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 723 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 724         int f;
 725 #ifdef _WIN32
 726         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
 727 #else
 728         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 729 #endif
 730         if (f>=0){
 731                 GLubyte    targaMagic[12] = { 0, //no identification field
 732                          0,//no colormap
 733                          2,//RGB image (well, BGR, actually)
 734                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 735                 GLubyte blah;
 736                 int r;
 737                 GLubyte *s;
 738                 int x,y;
 739
 740                 //write .TGA header.
 741                 write (f,targaMagic,sizeof(targaMagic));
 742                 blah=w%256;write (f,&blah,1);//w, low
 743                 blah=w/256;write (f,&blah,1);//w, high
 744                 blah=h%256;write (f,&blah,1);//h, low
 745                 blah=h/256;write (f,&blah,1);//h, high
 746                 blah=24;write (f,&blah,1);//24 bpp
 747                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 748
 749                 s=buf;
 750                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 751                         for (x=0;x<w;x++){
 752                                 blah=s[0];
 753                                 s[0]=s[2];
 754                                 s[2]=blah;
 755                                 s+=3;
 756                         }
 757                 }
 758                 x=0;y=w*h*3;
 759                 while (y > 0)
 760                 {
 761                         r=write(f,buf+x,y);
 762                         if (r<=0){
 763                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 764                                 break;
 765                         }
 766                         x+=r;y-=r;
 767                 }
 768                 close(f);
 769         }else{
 770                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 771         }
 772 }
 773 void save_screen_shot(int automap_flag)
 774 {
 775 //      fix t1;
 776         char message[100];
 777         static int savenum=0;
 778         char savename[13];
 779         unsigned char *buf;
 780
 781         if (!ogl_readpixels_ok){
 782                 if (!automap_flag)
 783                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 784                 return;
 785         }
 786
 787         stop_time();
 788
 789 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 790         if ( savenum == 9999 ) savenum = 0;
 791         sprintf(savename,"scrn%04d.tga",savenum++);
 792
 793         while(!access(savename,0))
 794         {
 795                 if ( savenum == 9999 ) savenum = 0;
 796                 sprintf(savename,"scrn%04d.tga",savenum++);
 797         }
 798         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 799 //end this section addition/change - Victor Rachels
 800
 801         if (automap_flag) {
 802 //      save_font = grd_curcanv->cv_font;
 803 //      gr_set_curfont(GAME_FONT);
 804 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 805 //      gr_get_string_size(message,&w,&h,&aw);
 806 //              modex_print_message(32, 2, message);
 807         } else {
 808                 hud_message(MSGC_GAME_FEEDBACK,message);
 809         }
 810
 811         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 812         glReadBuffer(GL_FRONT);
 813         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 814         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 815         d_free(buf);
 816
 817         key_flush();
 818         start_time();
 819 }