arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.36 2004-11-14 09:34:23 schaffner 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
  44 #include "strutil.h"
  45 #include "mono.h"
  46 #include "args.h"
  47 #include "key.h"
  48
  49 #define DECLARE_VARS
  50 #include "internal.h"
  51 #if defined(__APPLE__) && defined(__MACH__)
  52 #include <OpenGL/glu.h>
  53 #undef GL_ARB_multitexture // hack!
  54 #else
  55 #include <GL/glu.h>
  56 #endif
  57
  58 int ogl_voodoohack=0;
  59
  60 int gr_installed = 0;
  61
  62
  63 void gr_palette_clear(); // Function prototype for gr_init;
  64 int gl_initialized=0;
  65 int gl_reticle = 0;
  66
  67 int ogl_fullscreen=0;
  68
  69 int gr_check_fullscreen(void){
  70         return ogl_fullscreen;
  71 }
  72
  73 void gr_do_fullscreen(int f){
  74         if (ogl_voodoohack)
  75                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  76         else
  77                 ogl_fullscreen=f;
  78         if (gl_initialized){
  79                 ogl_do_fullscreen_internal();
  80         }
  81 }
  82
  83 int gr_toggle_fullscreen(void){
  84         gr_do_fullscreen(!ogl_fullscreen);
  85         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  86         return ogl_fullscreen;
  87 }
  88
  89 int arch_toggle_fullscreen_menu(void){
  90         unsigned char *buf=NULL;
  91
  92         if (ogl_readpixels_ok){
  93                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  94                 glReadBuffer(GL_FRONT);
  95                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  96         }
  97
  98         gr_do_fullscreen(!ogl_fullscreen);
  99
 100         if (ogl_readpixels_ok){
 101 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 102                 glRasterPos2f(0,0);
 103                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 104                 free(buf);
 105         }
 106         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 107
 108         return ogl_fullscreen;
 109 }
 110
 111 void ogl_init_state(void){
 112         /* select clearing (background) color   */
 113         glClearColor(0.0, 0.0, 0.0, 0.0);
 114         glShadeModel(GL_SMOOTH);
 115
 116         /* initialize viewing values */
 117         glMatrixMode(GL_PROJECTION);
 118         glLoadIdentity();
 119         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 120         glScalef(1.0, -1.0, 1.0);
 121         glTranslatef(0.0, -1.0, 0.0);
 122         gr_palette_step_up(0,0,0);//in case its left over from in game
 123 }
 124
 125 int last_screen_mode=-1;
 126
 127 void ogl_set_screen_mode(void){
 128         if (last_screen_mode==Screen_mode)
 129                 return;
 130         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 131 //      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);
 132         if (Screen_mode==SCREEN_GAME){
 133                 glDrawBuffer(GL_BACK);
 134         }else{
 135                 glClearColor(0.0, 0.0, 0.0, 0.0);
 136                 glDrawBuffer(GL_FRONT);
 137                 glClear(GL_COLOR_BUFFER_BIT);
 138                 glMatrixMode(GL_PROJECTION);
 139                 glLoadIdentity();//clear matrix
 140                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 141                 glMatrixMode(GL_MODELVIEW);
 142                 glLoadIdentity();//clear matrix
 143                 glEnable(GL_BLEND);
 144                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 145         }
 146         last_screen_mode=Screen_mode;
 147 }
 148
 149 void gr_update()
 150 {
 151         if (gl_initialized){
 152
 153                 if(Screen_mode != SCREEN_GAME){
 154                         glFlush();
 155                 }
 156         }
 157 }
 158
 159 const char *gl_vendor, *gl_renderer, *gl_version, *gl_extensions;
 160
 161 void ogl_get_verinfo(void)
 162 {
 163         int t, arb_max_textures = -1, sgi_max_textures = -1;
 164 #ifdef GL_NV_register_combiners
 165         int nv_register_combiners = -1;
 166 #endif
 167         float anisotropic_max = 0;
 168
 169         gl_vendor = (const char *) glGetString (GL_VENDOR);
 170         gl_renderer = (const char *) glGetString (GL_RENDERER);
 171         gl_version = (const char *) glGetString (GL_VERSION);
 172         gl_extensions = (const char *) glGetString (GL_EXTENSIONS);
 173
 174         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 175
 176         ogl_intensity4_ok = 1;
 177         ogl_luminance4_alpha4_ok = 1;
 178         ogl_rgba2_ok = 1;
 179         ogl_gettexlevelparam_ok = 1;
 180         ogl_setgammaramp_ok = 1;
 181
 182 #ifdef WGL_VIDEO
 183         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 184         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 185         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 186         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 187         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 188         dglCombinerParameteriNV = (glCombinerParameteriNV_fp)wglGetProcAddress("glCombinerParameteriNV");
 189         dglCombinerInputNV = (glCombinerInputNV_fp)wglGetProcAddress("glCombinerInputNV");
 190         dglCombinerOutputNV = (glCombinerOutputNV_fp)wglGetProcAddress("glCombinerOutputNV");
 191         dglFinalCombinerInputNV = (glFinalCombinerInputNV_fp)wglGetProcAddress("glFinalCombinerInputNV");
 192 #endif
 193
 194 #ifdef GL_ARB_multitexture
 195         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 196         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 197 #endif
 198 #ifdef GL_SGIS_multitexture
 199         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 200         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 201 #endif
 202         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 203 #ifdef GL_NV_register_combiners
 204         ogl_nv_register_combiners_ok=(strstr(gl_extensions,"GL_NV_register_combiners")!=0 && glCombinerOutputNV!=0);
 205 #endif
 206
 207         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 208         if (ogl_ext_texture_filter_anisotropic_ok)
 209                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 210
 211 #ifdef GL_EXT_paletted_texture
 212         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 213         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 214 #endif
 215         //add driver specific hacks here.  whee.
 216         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){
 217                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 218                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 219                 ogl_gettexlevelparam_ok=0;//returns random data..
 220         }
 221         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 222                 //displays garbage. reported by
 223                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 224                 //  orulz (Matrox G200)
 225                 ogl_intensity4_ok=0;
 226         }
 227 #ifdef macintosh
 228         if (stricmp(gl_renderer,"3dfx Voodoo 3")==0){ // strangely, includes Voodoo 2
 229                 ogl_gettexlevelparam_ok=0; // Always returns 0
 230         }
 231 #endif
 232
 233         //allow overriding of stuff.
 234 #ifdef GL_ARB_multitexture
 235         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 236                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 237         }
 238         if (ogl_arb_multitexture_ok)
 239                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 240 #endif
 241 #ifdef GL_SGIS_multitexture
 242         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 243                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 244         }
 245         if (ogl_sgis_multitexture_ok)
 246                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 247 #endif
 248 #ifdef GL_NV_register_combiners
 249         if ((t = FindArg("-gl_nv_register_combiners_ok")))
 250         {
 251                 ogl_nv_register_combiners_ok=atoi(Args[t + 1]);
 252         }
 253         if (ogl_nv_register_combiners_ok)
 254                 glGetIntegerv(GL_MAX_GENERAL_COMBINERS_NV, &nv_register_combiners);
 255 #endif
 256 #ifdef GL_EXT_paletted_texture
 257         if ((t = FindArg("-gl_paletted_texture_ok")))
 258         {
 259                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 260         }
 261         if ((t = FindArg("-gl_shared_palette_ok")))
 262         {
 263                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 264         }
 265         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 266         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);
 267 #endif
 268         if ((t=FindArg("-gl_intensity4_ok"))){
 269                 ogl_intensity4_ok=atoi(Args[t+1]);
 270         }
 271         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 272                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 273         }
 274         if ((t=FindArg("-gl_rgba2_ok"))){
 275                 ogl_rgba2_ok=atoi(Args[t+1]);
 276         }
 277         if ((t=FindArg("-gl_readpixels_ok"))){
 278                 ogl_readpixels_ok=atoi(Args[t+1]);
 279         }
 280         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 281                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 282         }
 283         if ((t=FindArg("-gl_setgammaramp_ok")))
 284         {
 285                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 286         }
 287
 288         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);
 289 #ifdef GL_NV_register_combiners
 290         con_printf(CON_VERBOSE, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 291 #endif
 292         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);
 293 }
 294
 295
 296 int gr_check_mode(u_int32_t mode)
 297 {
 298         int w, h;
 299
 300         w = SM_W(mode);
 301         h = SM_H(mode);
 302         return ogl_check_mode(w, h); // platform specific code
 303 }
 304
 305
 306 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 307
 308 int gr_set_mode(u_int32_t mode)
 309 {
 310         unsigned int w,h;
 311         char *gr_bm_data;
 312
 313 #ifdef NOGRAPH
 314 return 0;
 315 #endif
 316 //      mode=0;
 317         if (mode<=0)
 318                 return 0;
 319
 320         w=SM_W(mode);
 321         h=SM_H(mode);
 322         VGA_current_mode = mode;
 323
 324         //if (screen != NULL) gr_palette_clear();
 325
 326 //      ogl_init_state();
 327
 328         gr_bm_data=(char *)grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 329         memset( grd_curscreen, 0, sizeof(grs_screen));
 330         grd_curscreen->sc_mode = mode;
 331         grd_curscreen->sc_w = w;
 332         grd_curscreen->sc_h = h;
 333         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 334         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 335         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 336         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 337         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 338         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 339         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 340         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 341         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 342 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 343         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 344         gr_set_current_canvas(NULL);
 345         //gr_enable_default_palette_loading();
 346
 347         ogl_init_window(w,h);//platform specific code
 348
 349         ogl_get_verinfo();
 350
 351         OGL_VIEWPORT(0,0,w,h);
 352
 353         ogl_set_screen_mode();
 354
 355 //      gamefont_choose_game_font(w,h);
 356
 357         return 0;
 358 }
 359
 360 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 361 int ogl_atotexfilti(char *a,int min){
 362         GLstrcmptestr(a,NEAREST);
 363         GLstrcmptestr(a,LINEAR);
 364         if (min){//mipmaps are valid only for the min filter
 365                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 366                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 367                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 368                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 369         }
 370         Error("unknown/invalid texture filter %s\n",a);
 371 //      return GL_NEAREST;
 372 }
 373 int ogl_testneedmipmaps(int i){
 374         switch (i){
 375                 case GL_NEAREST:
 376                 case GL_LINEAR:
 377                         return 0;
 378                 case GL_NEAREST_MIPMAP_NEAREST:
 379                 case GL_NEAREST_MIPMAP_LINEAR:
 380                 case GL_LINEAR_MIPMAP_NEAREST:
 381                 case GL_LINEAR_MIPMAP_LINEAR:
 382                         return 1;
 383         }
 384         Error("unknown texture filter %x\n",i);
 385 //      return -1;
 386 }
 387 #ifdef OGL_RUNTIME_LOAD
 388 #ifdef _WIN32
 389 char *OglLibPath="opengl32.dll";
 390 #endif
 391 #ifdef __unix__
 392 char *OglLibPath="libGL.so";
 393 #endif
 394
 395 int ogl_rt_loaded=0;
 396 int ogl_init_load_library(void)
 397 {
 398         int retcode=0;
 399         if (!ogl_rt_loaded){
 400                 int t;
 401                 if ((t=FindArg("-gl_library")))
 402                         OglLibPath=Args[t+1];
 403
 404                 retcode = OpenGL_LoadLibrary(true);
 405                 if(retcode)
 406                 {
 407                         mprintf((0,"Opengl loaded ok\n"));
 408
 409                         if(!glEnd)
 410                         {
 411                                 Error("Opengl: Functions not imported\n");
 412                         }
 413                 }else{
 414                         Error("Opengl: error loading %s\n",OglLibPath);
 415                 }
 416                 ogl_rt_loaded=1;
 417         }
 418         return retcode;
 419 }
 420 #endif
 421
 422 int gr_init()
 423 {
 424         int mode = SM(640,480);
 425         int retcode, t, glt = 0;
 426
 427         // Only do this function once!
 428         if (gr_installed==1)
 429                 return -1;
 430
 431
 432 #ifdef OGL_RUNTIME_LOAD
 433         ogl_init_load_library();
 434 #endif
 435
 436 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 437         if (FindArg("-gl_voodoo")){
 438                 ogl_voodoohack=1;
 439                 gr_toggle_fullscreen();
 440         }
 441         if (FindArg("-fullscreen"))
 442                 gr_toggle_fullscreen();
 443 #endif
 444         if ((glt=FindArg("-gl_alttexmerge")))
 445                 ogl_alttexmerge=1;
 446         if ((t=FindArg("-gl_stdtexmerge")))
 447                 if (t>=glt)//allow overriding of earlier args
 448                         ogl_alttexmerge=0;
 449
 450         if ((glt = FindArg("-gl_16bittextures")))
 451         {
 452                 ogl_rgba_internalformat = GL_RGB5_A1;
 453                 ogl_rgb_internalformat = GL_RGB5;
 454         }
 455
 456         if ((glt=FindArg("-gl_mipmap"))){
 457                 GL_texmagfilt=GL_LINEAR;
 458                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 459         }
 460         if ((glt=FindArg("-gl_trilinear")))
 461         {
 462                 GL_texmagfilt = GL_LINEAR;
 463                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 464         }
 465         if ((t=FindArg("-gl_simple"))){
 466                 if (t>=glt){//allow overriding of earlier args
 467                         glt=t;
 468                         GL_texmagfilt=GL_NEAREST;
 469                         GL_texminfilt=GL_NEAREST;
 470                 }
 471         }
 472         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 473                 if (t>=glt)//allow overriding of earlier args
 474                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 475         }
 476         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 477                 if (t>=glt)//allow overriding of earlier args
 478                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 479         }
 480         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 481
 482         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 483         {
 484                 GL_texanisofilt=atof(Args[t + 1]);
 485         }
 486
 487         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 488
 489
 490         if ((t=FindArg("-gl_vidmem"))){
 491                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 492         }
 493         if ((t=FindArg("-gl_reticle"))){
 494                 gl_reticle=atoi(Args[t+1]);
 495         }
 496         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 497
 498         ogl_init();//platform specific initialization
 499
 500         ogl_init_texture_list_internal();
 501
 502         MALLOC( grd_curscreen,grs_screen,1 );
 503         memset( grd_curscreen, 0, sizeof(grs_screen));
 504         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 505
 506         // Set the mode.
 507         if ((retcode=gr_set_mode(mode)))
 508         {
 509                 return retcode;
 510         }
 511
 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
 530         ogl_close();//platform specific code
 531         if (grd_curscreen){
 532                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 533                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 534                 d_free(grd_curscreen);
 535         }
 536 #ifdef OGL_RUNTIME_LOAD
 537         if (ogl_rt_loaded)
 538                 OpenGL_LoadLibrary(false);
 539 #endif
 540 }
 541 extern int r_upixelc;
 542 void ogl_upixelc(int x, int y, int c){
 543         r_upixelc++;
 544 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 545 //      if(Function_mode != FMODE_GAME){
 546 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 547 //      }else{
 548                 OGL_DISABLE(TEXTURE_2D);
 549                 glPointSize(1.0);
 550                 glBegin(GL_POINTS);
 551 //              glBegin(GL_LINES);
 552 //      ogl_pal=gr_current_pal;
 553                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 554 //      ogl_pal=gr_palette;
 555                 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);
 556 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 557                 glEnd();
 558 //      }
 559 }
 560 void ogl_urect(int left,int top,int right,int bot){
 561         GLfloat xo,yo,xf,yf;
 562         int c=COLOR;
 563
 564         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 565         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 566         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 567         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 568
 569         OGL_DISABLE(TEXTURE_2D);
 570         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 571         glBegin(GL_QUADS);
 572         glVertex2f(xo,yo);
 573         glVertex2f(xo,yf);
 574         glVertex2f(xf,yf);
 575         glVertex2f(xf,yo);
 576         glEnd();
 577 }
 578 void ogl_ulinec(int left,int top,int right,int bot,int c){
 579         GLfloat xo,yo,xf,yf;
 580
 581         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 582         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 583         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 584         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 585
 586         OGL_DISABLE(TEXTURE_2D);
 587         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 588         glBegin(GL_LINES);
 589         glVertex2f(xo,yo);
 590         glVertex2f(xf,yf);
 591         glEnd();
 592 }
 593
 594
 595 GLfloat last_r=0, last_g=0, last_b=0;
 596 int do_pal_step=0;
 597 void ogl_do_palfx(void){
 598 //      GLfloat r,g,b,a;
 599         OGL_DISABLE(TEXTURE_2D);
 600         if (gr_palette_faded_out){
 601 /*              glEnable(GL_BLEND);
 602                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 603                 glColor3f(0,0,0);
 604 //              r=g=b=0.0;a=1.0;
 605         }else{
 606                 if (do_pal_step){
 607                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 608                         glEnable(GL_BLEND);
 609                         glBlendFunc(GL_ONE,GL_ONE);
 610                         glColor3f(last_r,last_g,last_b);
 611 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 612                 }else
 613                         return;
 614         }
 615
 616
 617         glBegin(GL_QUADS);
 618         glVertex2f(0,0);
 619         glVertex2f(0,1);
 620         glVertex2f(1,1);
 621         glVertex2f(1,0);
 622         glEnd();
 623
 624         glEnable(GL_BLEND);
 625         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 626 }
 627
 628 void gr_palette_clear()
 629 {
 630         gr_palette_faded_out=1;
 631 }
 632
 633
 634 int ogl_brightness_ok = 0;
 635 int ogl_setgammaramp_ok = 1;
 636 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 637 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 638
 639 void gr_palette_step_up(int r, int g, int b)
 640 {
 641         if (gr_palette_faded_out)
 642                 return;
 643
 644         old_b_r = ogl_brightness_r;
 645         old_b_g = ogl_brightness_g;
 646         old_b_b = ogl_brightness_b;
 647
 648         ogl_brightness_r = max(r + gr_palette_gamma, 0);
 649         ogl_brightness_g = max(g + gr_palette_gamma, 0);
 650         ogl_brightness_b = max(b + gr_palette_gamma, 0);
 651
 652         if (ogl_setgammaramp_ok &&
 653             (old_b_r != ogl_brightness_r ||
 654              old_b_g != ogl_brightness_g ||
 655              old_b_b != ogl_brightness_b))
 656                 ogl_brightness_ok = !ogl_setbrightness_internal();
 657
 658         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 659         {
 660                 last_r = ogl_brightness_r / 63.0;
 661                 last_g = ogl_brightness_g / 63.0;
 662                 last_b = ogl_brightness_b / 63.0;
 663
 664                 do_pal_step = (r || g || b || gr_palette_gamma);
 665         }
 666         else
 667         {
 668                 do_pal_step = 0;
 669         }
 670 }
 671
 672 //added on 980913 by adb to fix palette problems
 673 // need a min without side effects...
 674 #undef min
 675 static inline int min(int x, int y) { return x < y ? x : y; }
 676 //end changes by adb
 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         gr_palette_faded_out=1;
 702         return 0;
 703 }
 704
 705
 706
 707 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 708 {
 709         gr_palette_faded_out=0;
 710         return 0;
 711 }
 712
 713
 714
 715 void gr_palette_read(ubyte * pal)
 716 {
 717         int i;
 718         for (i=0; i<768; i++ ) {
 719                 pal[i]=gr_current_pal[i];
 720                 if (pal[i] > 63) pal[i] = 63;
 721         }
 722 }
 723
 724 //writes out an uncompressed RGB .tga file
 725 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 726 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 727         CFILE *f;
 728
 729         f = cfopen(savename, "wb");
 730
 731         if (f>=0){
 732                 GLubyte    targaMagic[12] = { 0, //no identification field
 733                          0,//no colormap
 734                          2,//RGB image (well, BGR, actually)
 735                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 736                 GLubyte blah;
 737                 int r;
 738                 GLubyte *s;
 739                 int x,y;
 740
 741                 //write .TGA header.
 742                 cfwrite (targaMagic,sizeof(targaMagic),1,f);
 743                 cfile_write_short (w,f);
 744         cfile_write_short (h,f);
 745                 cfile_write_byte (24,f);//24 bpp
 746                 cfile_write_byte (0,f);//no attribute bits, origin is lowerleft, no interleave
 747
 748                 s=buf;
 749                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 750                         for (x=0;x<w;x++){
 751                                 blah=s[0];
 752                                 s[0]=s[2];
 753                                 s[2]=blah;
 754                                 s+=3;
 755                         }
 756                 }
 757                 x=0;y=w*h*3;
 758                 while (y > 0)
 759                 {
 760                         r=cfwrite(buf+x,1,y,f);
 761                         if (r<=0){
 762                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 763                                 break;
 764                         }
 765                         x+=r;y-=r;
 766                 }
 767                 cfclose(f);
 768         }else{
 769                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 770         }
 771 }
 772 void save_screen_shot(int automap_flag)
 773 {
 774 //      fix t1;
 775         char message[100];
 776         static int savenum=0;
 777         char savename[13];
 778         unsigned char *buf;
 779
 780         if (!ogl_readpixels_ok){
 781                 if (!automap_flag)
 782                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 783                 return;
 784         }
 785
 786         stop_time();
 787
 788 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 789         if ( savenum == 9999 ) savenum = 0;
 790         sprintf(savename,"scrn%04d.tga",savenum++);
 791
 792         while(!access(savename,0))
 793         {
 794                 if ( savenum == 9999 ) savenum = 0;
 795                 sprintf(savename,"scrn%04d.tga",savenum++);
 796         }
 797         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 798 //end this section addition/change - Victor Rachels
 799
 800         if (automap_flag) {
 801 //      save_font = grd_curcanv->cv_font;
 802 //      gr_set_curfont(GAME_FONT);
 803 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 804 //      gr_get_string_size(message,&w,&h,&aw);
 805 //              modex_print_message(32, 2, message);
 806         } else {
 807                 hud_message(MSGC_GAME_FEEDBACK,message);
 808         }
 809
 810         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 811         glReadBuffer(GL_FRONT);
 812         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 813         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 814         d_free(buf);
 815
 816         key_flush();
 817         start_time();
 818 }