arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.45 2006-11-26 06:13:35 chris 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(_MSC_VER) && !defined(macintosh)
  21 #include <unistd.h>
  22 #endif
  23 #if !defined(macintosh)
  24 #include <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <fcntl.h>
  27 #endif
  28
  29 #include <errno.h>
  30
  31 #include "hudmsg.h"
  32 #include "game.h"
  33 #include "text.h"
  34 #include "gr.h"
  35 #include "gamefont.h"
  36 #include "grdef.h"
  37 #include "palette.h"
  38 #include "u_mem.h"
  39 #include "error.h"
  40
  41 #include "inferno.h"
  42 #include "screens.h"
  43 #include "timer.h"
  44 #include "strutil.h"
  45 #include "mono.h"
  46 #include "args.h"
  47 #include "key.h"
  48 #include "physfsx.h"
  49
  50 #define DECLARE_VARS
  51 #include "internal.h"
  52 #if defined(__APPLE__) && defined(__MACH__)
  53 #include <OpenGL/glu.h>
  54 #undef GL_ARB_multitexture // hack!
  55 #else
  56 #include <GL/glu.h>
  57 #endif
  58
  59 int ogl_voodoohack=0;
  60
  61 int gr_installed = 0;
  62
  63
  64 void gr_palette_clear(); // Function prototype for gr_init;
  65 int gl_initialized=0;
  66 int gl_reticle = 0;
  67
  68 int ogl_fullscreen=0;
  69
  70 int gr_check_fullscreen(void){
  71         return ogl_fullscreen;
  72 }
  73
  74 void gr_do_fullscreen(int f){
  75         if (ogl_voodoohack)
  76                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  77         else
  78                 ogl_fullscreen=f;
  79         if (gl_initialized){
  80                 ogl_do_fullscreen_internal();
  81         }
  82 }
  83
  84 int gr_toggle_fullscreen(void){
  85         gr_do_fullscreen(!ogl_fullscreen);
  86         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  87         return ogl_fullscreen;
  88 }
  89
  90 int arch_toggle_fullscreen_menu(void){
  91         unsigned char *buf=NULL;
  92
  93         if (ogl_readpixels_ok){
  94                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  95                 glReadBuffer(GL_FRONT);
  96                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  97         }
  98
  99         gr_do_fullscreen(!ogl_fullscreen);
 100
 101         if (ogl_readpixels_ok){
 102 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 103                 glRasterPos2f(0,0);
 104                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 105                 free(buf);
 106         }
 107         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 108
 109         return ogl_fullscreen;
 110 }
 111
 112 void ogl_init_state(void){
 113         /* select clearing (background) color   */
 114         glClearColor(0.0, 0.0, 0.0, 0.0);
 115         glShadeModel(GL_SMOOTH);
 116
 117         /* initialize viewing values */
 118         glMatrixMode(GL_PROJECTION);
 119         glLoadIdentity();
 120         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 121         glScalef(1.0, -1.0, 1.0);
 122         glTranslatef(0.0, -1.0, 0.0);
 123         gr_palette_step_up(0,0,0);//in case its left over from in game
 124 }
 125
 126 int last_screen_mode=-1;
 127
 128 void ogl_set_screen_mode(void){
 129         if (last_screen_mode==Screen_mode)
 130                 return;
 131         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 132 //      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);
 133         if (Screen_mode==SCREEN_GAME){
 134                 glDrawBuffer(GL_BACK);
 135         }else{
 136                 glClearColor(0.0, 0.0, 0.0, 0.0);
 137                 glDrawBuffer(GL_FRONT);
 138                 glClear(GL_COLOR_BUFFER_BIT);
 139                 glMatrixMode(GL_PROJECTION);
 140                 glLoadIdentity();//clear matrix
 141                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 142                 glMatrixMode(GL_MODELVIEW);
 143                 glLoadIdentity();//clear matrix
 144                 glEnable(GL_BLEND);
 145                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 146         }
 147         last_screen_mode=Screen_mode;
 148 }
 149
 150 void gr_update()
 151 {
 152         if (gl_initialized){
 153
 154                 if(Screen_mode != SCREEN_GAME){
 155                         glFlush();
 156                 }
 157         }
 158 }
 159
 160 const char *gl_vendor, *gl_renderer, *gl_version, *gl_extensions;
 161
 162 void ogl_get_verinfo(void)
 163 {
 164         long t, sgi_max_textures = -1;
 165         GLint arb_max_textures = -1;
 166 #ifdef GL_NV_register_combiners
 167         long nv_register_combiners = -1;
 168 #endif
 169         float anisotropic_max = 0;
 170
 171         gl_vendor = (const char *) glGetString (GL_VENDOR);
 172         gl_renderer = (const char *) glGetString (GL_RENDERER);
 173         gl_version = (const char *) glGetString (GL_VERSION);
 174         gl_extensions = (const char *) glGetString (GL_EXTENSIONS);
 175
 176         con_printf(CON_VERBOSE, "OpenGL: vendor: %s\nOpenGL: renderer: %s\nOpenGL: version: %s\n",gl_vendor,gl_renderer,gl_version);
 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 #ifdef macintosh
 230         if (stricmp(gl_renderer,"3dfx Voodoo 3")==0){ // strangely, includes Voodoo 2
 231                 ogl_gettexlevelparam_ok=0; // Always returns 0
 232         }
 233 #endif
 234
 235         //allow overriding of stuff.
 236 #ifdef GL_ARB_multitexture
 237         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 238                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 239         }
 240         if (ogl_arb_multitexture_ok)
 241                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 242 #endif
 243 #ifdef GL_SGIS_multitexture
 244         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 245                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 246         }
 247         if (ogl_sgis_multitexture_ok)
 248                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 249 #endif
 250 #ifdef GL_NV_register_combiners
 251         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 252         {
 253                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 254         }
 255         if (ogl_nv_register_combiners_ok)
 256                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 257 #endif
 258 #ifdef GL_EXT_paletted_texture
 259         if ((t = FindArg("-gl_paletted_texture_ok")))
 260         {
 261                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 262         }
 263         if ((t = FindArg("-gl_shared_palette_ok")))
 264         {
 265                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 266         }
 267         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 268         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);
 269 #endif
 270         if ((t=FindArg("-gl_intensity4_ok"))){
 271                 ogl_intensity4_ok=atoi(Args[t+1]);
 272         }
 273         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 274                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 275         }
 276         if ((t=FindArg("-gl_rgba2_ok"))){
 277                 ogl_rgba2_ok=atoi(Args[t+1]);
 278         }
 279         if ((t=FindArg("-gl_readpixels_ok"))){
 280                 ogl_readpixels_ok=atoi(Args[t+1]);
 281         }
 282         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 283                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 284         }
 285         if ((t=FindArg("-gl_setgammaramp_ok")))
 286         {
 287                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 288         }
 289
 290         con_printf(CON_DEBUG, "gl_arb_multitexture:%i(%i units) gl_sgis_multitexture:%i(%i units) gl_nv_texture_env_combine4:%i\n", ogl_arb_multitexture_ok, arb_max_textures, ogl_sgis_multitexture_ok, sgi_max_textures, ogl_nv_texture_env_combine4_ok);
 291 #ifdef GL_NV_register_combiners
 292         con_printf(CON_DEBUG, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 293 #endif
 294         con_printf(CON_DEBUG, "gl_intensity4:%i gl_luminance4_alpha4:%i gl_rgba2:%i gl_readpixels:%i gl_gettexlevelparam:%i gl_setgammaramp_ok:%i gl_ext_texture_filter_anisotropic:%i(%f max)\n", ogl_intensity4_ok, ogl_luminance4_alpha4_ok, ogl_rgba2_ok, ogl_readpixels_ok, ogl_gettexlevelparam_ok, ogl_setgammaramp_ok, ogl_ext_texture_filter_anisotropic_ok, anisotropic_max);
 295 }
 296
 297
 298 int gr_check_mode(u_int32_t mode)
 299 {
 300         int w, h;
 301
 302         w = SM_W(mode);
 303         h = SM_H(mode);
 304         return ogl_check_mode(w, h); // platform specific code
 305 }
 306
 307
 308 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 309
 310 int gr_set_mode(u_int32_t mode)
 311 {
 312         unsigned int w,h;
 313         char *gr_bm_data;
 314
 315 #ifdef NOGRAPH
 316 return 0;
 317 #endif
 318 //      mode=0;
 319         if (mode<=0)
 320                 return 0;
 321
 322         if (mode == VGA_current_mode)
 323                 return 0;
 324
 325         w=SM_W(mode);
 326         h=SM_H(mode);
 327         VGA_current_mode = mode;
 328
 329         //if (screen != NULL) gr_palette_clear();
 330
 331 //      ogl_init_state();
 332
 333         gr_bm_data=(char *)grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 334         memset( grd_curscreen, 0, sizeof(grs_screen));
 335         grd_curscreen->sc_mode = mode;
 336         grd_curscreen->sc_w = w;
 337         grd_curscreen->sc_h = h;
 338         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 339         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 340         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 341         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 342         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 343         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 344         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 345         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 346         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 347 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 348         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 349         gr_set_current_canvas(NULL);
 350         //gr_enable_default_palette_loading();
 351
 352         ogl_init_window(w,h);//platform specific code
 353
 354         ogl_get_verinfo();
 355
 356         OGL_VIEWPORT(0,0,w,h);
 357
 358         ogl_set_screen_mode();
 359
 360 //      gamefont_choose_game_font(w,h);
 361
 362         return 0;
 363 }
 364
 365 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 366 int ogl_atotexfilti(char *a,int min){
 367         GLstrcmptestr(a,NEAREST);
 368         GLstrcmptestr(a,LINEAR);
 369         if (min){//mipmaps are valid only for the min filter
 370                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 371                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 372                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 373                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 374         }
 375         Error("unknown/invalid texture filter %s\n",a);
 376 //      return GL_NEAREST;
 377 }
 378 int ogl_testneedmipmaps(int i){
 379         switch (i){
 380                 case GL_NEAREST:
 381                 case GL_LINEAR:
 382                         return 0;
 383                 case GL_NEAREST_MIPMAP_NEAREST:
 384                 case GL_NEAREST_MIPMAP_LINEAR:
 385                 case GL_LINEAR_MIPMAP_NEAREST:
 386                 case GL_LINEAR_MIPMAP_LINEAR:
 387                         return 1;
 388         }
 389         Error("unknown texture filter %x\n",i);
 390 //      return -1;
 391 }
 392 #ifdef OGL_RUNTIME_LOAD
 393 #ifdef _WIN32
 394 char *OglLibPath="opengl32.dll";
 395 #endif
 396 #ifdef __unix__
 397 char *OglLibPath="libGL.so";
 398 #endif
 399 #ifdef macintosh
 400 char *OglLibPath = NULL;
 401 #endif
 402
 403 int ogl_rt_loaded=0;
 404 int ogl_init_load_library(void)
 405 {
 406         int retcode=0;
 407         if (!ogl_rt_loaded){
 408                 int t;
 409                 if ((t=FindArg("-gl_library")))
 410                         OglLibPath=Args[t+1];
 411
 412                 retcode = OpenGL_LoadLibrary(true);
 413                 if(retcode)
 414                 {
 415                         mprintf((0,"Opengl loaded ok\n"));
 416
 417                         if(!glEnd)
 418                         {
 419                                 Error("Opengl: Functions not imported\n");
 420                         }
 421                 }else{
 422                         Error("Opengl: error loading %s\n", OglLibPath? OglLibPath : SDL_GetError());
 423                 }
 424                 ogl_rt_loaded=1;
 425         }
 426         return retcode;
 427 }
 428 #endif
 429
 430 int gr_init()
 431 {
 432         int t, glt = 0;
 433
 434         // Only do this function once!
 435         if (gr_installed==1)
 436                 return -1;
 437
 438
 439 #ifdef OGL_RUNTIME_LOAD
 440         ogl_init_load_library();
 441 #endif
 442
 443 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 444         if (FindArg("-gl_voodoo")){
 445                 ogl_voodoohack=1;
 446                 gr_toggle_fullscreen();
 447         }
 448         if (FindArg("-fullscreen"))
 449                 gr_toggle_fullscreen();
 450 #endif
 451         if ((glt=FindArg("-gl_alttexmerge")))
 452                 ogl_alttexmerge=1;
 453         if ((t=FindArg("-gl_stdtexmerge")))
 454                 if (t>=glt)//allow overriding of earlier args
 455                         ogl_alttexmerge=0;
 456
 457         if ((glt = FindArg("-gl_16bittextures")))
 458         {
 459                 ogl_rgba_internalformat = GL_RGB5_A1;
 460                 ogl_rgb_internalformat = GL_RGB5;
 461         }
 462
 463         if ((glt=FindArg("-gl_mipmap"))){
 464                 GL_texmagfilt=GL_LINEAR;
 465                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 466         }
 467         if ((glt=FindArg("-gl_trilinear")))
 468         {
 469                 GL_texmagfilt = GL_LINEAR;
 470                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 471         }
 472         if ((t=FindArg("-gl_simple"))){
 473                 if (t>=glt){//allow overriding of earlier args
 474                         glt=t;
 475                         GL_texmagfilt=GL_NEAREST;
 476                         GL_texminfilt=GL_NEAREST;
 477                 }
 478         }
 479         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 480                 if (t>=glt)//allow overriding of earlier args
 481                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 482         }
 483         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 484                 if (t>=glt)//allow overriding of earlier args
 485                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 486         }
 487         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 488
 489         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 490         {
 491                 GL_texanisofilt=atof(Args[t + 1]);
 492         }
 493
 494         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 495
 496
 497         if ((t=FindArg("-gl_vidmem"))){
 498                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 499         }
 500         if ((t=FindArg("-gl_reticle"))){
 501                 gl_reticle=atoi(Args[t+1]);
 502         }
 503         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 504
 505         ogl_init();//platform specific initialization
 506
 507         ogl_init_texture_list_internal();
 508
 509         MALLOC( grd_curscreen,grs_screen,1 );
 510         memset( grd_curscreen, 0, sizeof(grs_screen));
 511         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 512         grd_curscreen->sc_canvas.cv_color = 0;
 513         grd_curscreen->sc_canvas.cv_drawmode = 0;
 514         grd_curscreen->sc_canvas.cv_font = NULL;
 515         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 516         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 517         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 518
 519         gr_installed = 1;
 520
 521         atexit(gr_close);
 522
 523         return 0;
 524 }
 525
 526 void gr_close()
 527 {
 528 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 529         ogl_brightness_r = ogl_brightness_g = ogl_brightness_b = 0;
 530         ogl_setbrightness_internal();
 531
 532         ogl_close();//platform specific code
 533         if (grd_curscreen){
 534                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 535                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 536                 d_free(grd_curscreen);
 537         }
 538 #ifdef OGL_RUNTIME_LOAD
 539         if (ogl_rt_loaded)
 540                 OpenGL_LoadLibrary(false);
 541 #endif
 542 }
 543 extern int r_upixelc;
 544 void ogl_upixelc(int x, int y, int c){
 545         r_upixelc++;
 546 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 547 //      if(Function_mode != FMODE_GAME){
 548 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 549 //      }else{
 550                 OGL_DISABLE(TEXTURE_2D);
 551                 glPointSize(1.0);
 552                 glBegin(GL_POINTS);
 553 //              glBegin(GL_LINES);
 554 //      ogl_pal=gr_current_pal;
 555                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 556 //      ogl_pal=gr_palette;
 557                 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);
 558 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 559                 glEnd();
 560 //      }
 561 }
 562 void ogl_urect(int left,int top,int right,int bot){
 563         GLfloat xo,yo,xf,yf;
 564         int c=COLOR;
 565
 566         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 567         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 568         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 569         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 570
 571         OGL_DISABLE(TEXTURE_2D);
 572         if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
 573                 glColor3f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c));
 574         else
 575                 glColor4f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
 576         glBegin(GL_QUADS);
 577         glVertex2f(xo,yo);
 578         glVertex2f(xo,yf);
 579         glVertex2f(xf,yf);
 580         glVertex2f(xf,yo);
 581         glEnd();
 582 }
 583 void ogl_ulinec(int left,int top,int right,int bot,int c){
 584         GLfloat xo,yo,xf,yf;
 585
 586         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 587         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 588         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 589         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 590
 591         OGL_DISABLE(TEXTURE_2D);
 592         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 593         glBegin(GL_LINES);
 594         glVertex2f(xo,yo);
 595         glVertex2f(xf,yf);
 596         glEnd();
 597 }
 598
 599
 600 GLfloat last_r=0, last_g=0, last_b=0;
 601 int do_pal_step=0;
 602 void ogl_do_palfx(void){
 603 //      GLfloat r,g,b,a;
 604         OGL_DISABLE(TEXTURE_2D);
 605         if (gr_palette_faded_out){
 606 /*              glEnable(GL_BLEND);
 607                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 608                 glColor3f(0,0,0);
 609 //              r=g=b=0.0;a=1.0;
 610         }else{
 611                 if (do_pal_step){
 612                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 613                         glEnable(GL_BLEND);
 614                         glBlendFunc(GL_ONE,GL_ONE);
 615                         glColor3f(last_r,last_g,last_b);
 616 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 617                 }else
 618                         return;
 619         }
 620
 621
 622         glBegin(GL_QUADS);
 623         glVertex2f(0,0);
 624         glVertex2f(0,1);
 625         glVertex2f(1,1);
 626         glVertex2f(1,0);
 627         glEnd();
 628
 629         glEnable(GL_BLEND);
 630         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 631 }
 632
 633 void gr_palette_clear()
 634 {
 635         gr_palette_faded_out=1;
 636 }
 637
 638
 639 int ogl_brightness_ok = 0;
 640 int ogl_setgammaramp_ok = 1;
 641 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 642 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 643
 644 void gr_palette_step_up(int r, int g, int b)
 645 {
 646         if (gr_palette_faded_out)
 647                 return;
 648
 649         old_b_r = ogl_brightness_r;
 650         old_b_g = ogl_brightness_g;
 651         old_b_b = ogl_brightness_b;
 652
 653         ogl_brightness_r = max(r + gr_palette_gamma, 0);
 654         ogl_brightness_g = max(g + gr_palette_gamma, 0);
 655         ogl_brightness_b = max(b + gr_palette_gamma, 0);
 656
 657         if (ogl_setgammaramp_ok &&
 658             (old_b_r != ogl_brightness_r ||
 659              old_b_g != ogl_brightness_g ||
 660              old_b_b != ogl_brightness_b))
 661                 ogl_brightness_ok = !ogl_setbrightness_internal();
 662
 663         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 664         {
 665                 last_r = ogl_brightness_r / 63.0;
 666                 last_g = ogl_brightness_g / 63.0;
 667                 last_b = ogl_brightness_b / 63.0;
 668
 669                 do_pal_step = (r || g || b || gr_palette_gamma);
 670         }
 671         else
 672         {
 673                 do_pal_step = 0;
 674         }
 675 }
 676
 677
 678 void gr_palette_load( ubyte *pal )
 679 {
 680  int i;//, j;
 681
 682  for (i=0; i<768; i++ ) {
 683      gr_current_pal[i] = pal[i];
 684      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 685  }
 686  //palette = screen->format->palette;
 687
 688  gr_palette_faded_out=0;
 689
 690         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 691
 692  init_computed_colors();
 693
 694         ogl_init_shared_palette();
 695 }
 696
 697
 698
 699 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 700 {
 701         int j;
 702         unsigned char *buf;
 703
 704         if (gr_palette_faded_out) return 0;
 705
 706         if (grd_fades_disabled) {
 707                 gr_palette_clear();
 708                 return 0;
 709         }
 710
 711         if (!ogl_readpixels_ok) {
 712                 gr_palette_faded_out = 1;
 713                 return 0;
 714         }
 715
 716         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 717         glEnable(GL_BLEND);
 718         glDisable(GL_DEPTH_TEST);
 719
 720         glReadBuffer(GL_FRONT);
 721
 722         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 723         glReadBuffer(GL_FRONT);
 724         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 725
 726         for (j = 0; j < nsteps; j++) {
 727                 glRasterPos2f(0,0);
 728                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 729
 730                 glColor4f(0.0, 0.0, 0.0, (float)(j) / (nsteps - 1)); // go from 0 to 1
 731                 glBegin(GL_QUADS);
 732                 glVertex2i(0, 0);
 733                 glVertex2i(0, 1);
 734                 glVertex2i(1, 1);
 735                 glVertex2i(1, 0);
 736                 glEnd();
 737
 738                 gr_update();
 739
 740                 timer_delay(f0_1 / 10);
 741         }
 742         d_free(buf);
 743
 744         gr_palette_faded_out=1;
 745         return 0;
 746 }
 747
 748
 749
 750 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 751 {
 752         int j;
 753         unsigned char *buf;
 754
 755         if (!gr_palette_faded_out) return 0;
 756
 757         if (grd_fades_disabled) {
 758                 gr_palette_clear();
 759                 return 0;
 760         }
 761
 762         if (!ogl_readpixels_ok) {
 763                 gr_palette_faded_out = 0;
 764                 return 0;
 765         }
 766
 767         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 768         glEnable(GL_BLEND);
 769         glDisable(GL_DEPTH_TEST);
 770
 771         glReadBuffer(GL_FRONT);
 772
 773         MALLOC(buf, unsigned char, grd_curscreen->sc_w * grd_curscreen->sc_h * 3);
 774         glReadBuffer(GL_FRONT);
 775         glReadPixels(0, 0, grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 776
 777         for (j = 0; j < nsteps; j++) {
 778                 glRasterPos2f(0,0);
 779                 glDrawPixels(grd_curscreen->sc_w, grd_curscreen->sc_h, GL_RGB, GL_UNSIGNED_BYTE, buf);
 780
 781                 glColor4f(0.0, 0.0, 0.0, (float)(nsteps - 1 - j) / (nsteps - 1)); // go from 1 to 0
 782                 glBegin(GL_QUADS);
 783                 glVertex2i(0, 0);
 784                 glVertex2i(0, 1);
 785                 glVertex2i(1, 1);
 786                 glVertex2i(1, 0);
 787                 glEnd();
 788
 789                 gr_update();
 790
 791                 timer_delay(f0_1 / 10);
 792         }
 793         d_free(buf);
 794
 795         gr_palette_faded_out=0;
 796         return 0;
 797 }
 798
 799
 800
 801 void gr_palette_read(ubyte * pal)
 802 {
 803         int i;
 804         for (i=0; i<768; i++ ) {
 805                 pal[i]=gr_current_pal[i];
 806                 if (pal[i] > 63) pal[i] = 63;
 807         }
 808 }
 809
 810 //writes out an uncompressed RGB .tga file
 811 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 812 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 813         PHYSFS_file *f;
 814
 815         f = PHYSFSX_openWriteBuffered(savename);
 816
 817         if (f>=0){
 818                 GLubyte    targaMagic[12] = { 0, //no identification field
 819                          0,//no colormap
 820                          2,//RGB image (well, BGR, actually)
 821                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 822                 GLubyte blah;
 823                 int r;
 824                 GLubyte *s;
 825                 int x,y;
 826
 827                 //write .TGA header.
 828                 PHYSFS_write(f, targaMagic, sizeof(targaMagic), 1);
 829                 PHYSFS_writeSLE16(f, w);
 830                 PHYSFS_writeSLE16(f, h);
 831                 PHYSFSX_writeU8(f, 24); // 24 bpp
 832                 PHYSFSX_writeU8(f, 0);  // no attribute bits, origin is lowerleft, no interleave
 833
 834                 s=buf;
 835                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 836                         for (x=0;x<w;x++){
 837                                 blah=s[0];
 838                                 s[0]=s[2];
 839                                 s[2]=blah;
 840                                 s+=3;
 841                         }
 842                 }
 843                 x=0;y=w*h*3;
 844                 while (y > 0)
 845                 {
 846                         r = PHYSFS_write(f, buf + x, 1, y);
 847                         if (r<=0){
 848                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 849                                 break;
 850                         }
 851                         x+=r;y-=r;
 852                 }
 853                 PHYSFS_close(f);
 854         }else{
 855                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 856         }
 857 }
 858 void save_screen_shot(int automap_flag)
 859 {
 860 //      fix t1;
 861         char message[100];
 862         static int savenum=0;
 863         char savename[13];
 864         unsigned char *buf;
 865
 866         if (!ogl_readpixels_ok){
 867                 if (!automap_flag)
 868                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 869                 return;
 870         }
 871
 872         stop_time();
 873
 874 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 875         do
 876         {
 877                 if (savenum == 9999)
 878                         savenum = 0;
 879                 sprintf(savename, "scrn%04d.tga", savenum++);
 880         } while (PHYSFS_exists(savename));
 881
 882         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 883 //end this section addition/change - Victor Rachels
 884
 885         if (automap_flag) {
 886 //      save_font = grd_curcanv->cv_font;
 887 //      gr_set_curfont(GAME_FONT);
 888 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 889 //      gr_get_string_size(message,&w,&h,&aw);
 890 //              modex_print_message(32, 2, message);
 891         } else {
 892                 hud_message(MSGC_GAME_FEEDBACK, "%s", message);
 893         }
 894
 895         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 896         glReadBuffer(GL_FRONT);
 897         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 898         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 899         d_free(buf);
 900
 901         key_flush();
 902         start_time();
 903 }