arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.44 2005-02-25 06:31:53 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(_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 #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_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);
 291 #ifdef GL_NV_register_combiners
 292         con_printf(CON_VERBOSE, "gl_nv_register_combiners:%i(%i stages)\n", ogl_nv_register_combiners_ok, nv_register_combiners);
 293 #endif
 294         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);
 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         w=SM_W(mode);
 323         h=SM_H(mode);
 324         VGA_current_mode = mode;
 325
 326         //if (screen != NULL) gr_palette_clear();
 327
 328 //      ogl_init_state();
 329
 330         gr_bm_data=(char *)grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 331         memset( grd_curscreen, 0, sizeof(grs_screen));
 332         grd_curscreen->sc_mode = mode;
 333         grd_curscreen->sc_w = w;
 334         grd_curscreen->sc_h = h;
 335         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 336         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 337         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 338         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 339         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 340         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 341         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 342         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 343         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 344 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 345         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 346         gr_set_current_canvas(NULL);
 347         //gr_enable_default_palette_loading();
 348
 349         ogl_init_window(w,h);//platform specific code
 350
 351         ogl_get_verinfo();
 352
 353         OGL_VIEWPORT(0,0,w,h);
 354
 355         ogl_set_screen_mode();
 356
 357 //      gamefont_choose_game_font(w,h);
 358
 359         return 0;
 360 }
 361
 362 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 363 int ogl_atotexfilti(char *a,int min){
 364         GLstrcmptestr(a,NEAREST);
 365         GLstrcmptestr(a,LINEAR);
 366         if (min){//mipmaps are valid only for the min filter
 367                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 368                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 369                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 370                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 371         }
 372         Error("unknown/invalid texture filter %s\n",a);
 373 //      return GL_NEAREST;
 374 }
 375 int ogl_testneedmipmaps(int i){
 376         switch (i){
 377                 case GL_NEAREST:
 378                 case GL_LINEAR:
 379                         return 0;
 380                 case GL_NEAREST_MIPMAP_NEAREST:
 381                 case GL_NEAREST_MIPMAP_LINEAR:
 382                 case GL_LINEAR_MIPMAP_NEAREST:
 383                 case GL_LINEAR_MIPMAP_LINEAR:
 384                         return 1;
 385         }
 386         Error("unknown texture filter %x\n",i);
 387 //      return -1;
 388 }
 389 #ifdef OGL_RUNTIME_LOAD
 390 #ifdef _WIN32
 391 char *OglLibPath="opengl32.dll";
 392 #endif
 393 #ifdef __unix__
 394 char *OglLibPath="libGL.so";
 395 #endif
 396 #ifdef macintosh
 397 char *OglLibPath = NULL;
 398 #endif
 399
 400 int ogl_rt_loaded=0;
 401 int ogl_init_load_library(void)
 402 {
 403         int retcode=0;
 404         if (!ogl_rt_loaded){
 405                 int t;
 406                 if ((t=FindArg("-gl_library")))
 407                         OglLibPath=Args[t+1];
 408
 409                 retcode = OpenGL_LoadLibrary(true);
 410                 if(retcode)
 411                 {
 412                         mprintf((0,"Opengl loaded ok\n"));
 413
 414                         if(!glEnd)
 415                         {
 416                                 Error("Opengl: Functions not imported\n");
 417                         }
 418                 }else{
 419                         Error("Opengl: error loading %s\n", OglLibPath? OglLibPath : SDL_GetError());
 420                 }
 421                 ogl_rt_loaded=1;
 422         }
 423         return retcode;
 424 }
 425 #endif
 426
 427 int gr_init()
 428 {
 429         int mode = SM(640,480);
 430         int retcode, t, glt = 0;
 431
 432         // Only do this function once!
 433         if (gr_installed==1)
 434                 return -1;
 435
 436
 437 #ifdef OGL_RUNTIME_LOAD
 438         ogl_init_load_library();
 439 #endif
 440
 441 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 442         if (FindArg("-gl_voodoo")){
 443                 ogl_voodoohack=1;
 444                 gr_toggle_fullscreen();
 445         }
 446         if (FindArg("-fullscreen"))
 447                 gr_toggle_fullscreen();
 448 #endif
 449         if ((glt=FindArg("-gl_alttexmerge")))
 450                 ogl_alttexmerge=1;
 451         if ((t=FindArg("-gl_stdtexmerge")))
 452                 if (t>=glt)//allow overriding of earlier args
 453                         ogl_alttexmerge=0;
 454
 455         if ((glt = FindArg("-gl_16bittextures")))
 456         {
 457                 ogl_rgba_internalformat = GL_RGB5_A1;
 458                 ogl_rgb_internalformat = GL_RGB5;
 459         }
 460
 461         if ((glt=FindArg("-gl_mipmap"))){
 462                 GL_texmagfilt=GL_LINEAR;
 463                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 464         }
 465         if ((glt=FindArg("-gl_trilinear")))
 466         {
 467                 GL_texmagfilt = GL_LINEAR;
 468                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 469         }
 470         if ((t=FindArg("-gl_simple"))){
 471                 if (t>=glt){//allow overriding of earlier args
 472                         glt=t;
 473                         GL_texmagfilt=GL_NEAREST;
 474                         GL_texminfilt=GL_NEAREST;
 475                 }
 476         }
 477         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 478                 if (t>=glt)//allow overriding of earlier args
 479                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 480         }
 481         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 482                 if (t>=glt)//allow overriding of earlier args
 483                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 484         }
 485         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 486
 487         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 488         {
 489                 GL_texanisofilt=atof(Args[t + 1]);
 490         }
 491
 492         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 493
 494
 495         if ((t=FindArg("-gl_vidmem"))){
 496                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 497         }
 498         if ((t=FindArg("-gl_reticle"))){
 499                 gl_reticle=atoi(Args[t+1]);
 500         }
 501         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 502
 503         ogl_init();//platform specific initialization
 504
 505         ogl_init_texture_list_internal();
 506
 507         MALLOC( grd_curscreen,grs_screen,1 );
 508         memset( grd_curscreen, 0, sizeof(grs_screen));
 509         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 510
 511         // Set the mode.
 512         if ((retcode=gr_set_mode(mode)))
 513         {
 514                 return retcode;
 515         }
 516
 517         grd_curscreen->sc_canvas.cv_color = 0;
 518         grd_curscreen->sc_canvas.cv_drawmode = 0;
 519         grd_curscreen->sc_canvas.cv_font = NULL;
 520         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 521         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 522         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 523
 524         gr_installed = 1;
 525
 526         atexit(gr_close);
 527
 528         return 0;
 529 }
 530
 531 void gr_close()
 532 {
 533 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 534         ogl_brightness_r = ogl_brightness_g = ogl_brightness_b = 0;
 535         ogl_setbrightness_internal();
 536
 537         ogl_close();//platform specific code
 538         if (grd_curscreen){
 539                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 540                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 541                 d_free(grd_curscreen);
 542         }
 543 #ifdef OGL_RUNTIME_LOAD
 544         if (ogl_rt_loaded)
 545                 OpenGL_LoadLibrary(false);
 546 #endif
 547 }
 548 extern int r_upixelc;
 549 void ogl_upixelc(int x, int y, int c){
 550         r_upixelc++;
 551 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 552 //      if(Function_mode != FMODE_GAME){
 553 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 554 //      }else{
 555                 OGL_DISABLE(TEXTURE_2D);
 556                 glPointSize(1.0);
 557                 glBegin(GL_POINTS);
 558 //              glBegin(GL_LINES);
 559 //      ogl_pal=gr_current_pal;
 560                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 561 //      ogl_pal=gr_palette;
 562                 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);
 563 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 564                 glEnd();
 565 //      }
 566 }
 567 void ogl_urect(int left,int top,int right,int bot){
 568         GLfloat xo,yo,xf,yf;
 569         int c=COLOR;
 570
 571         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 572         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 573         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 574         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 575
 576         OGL_DISABLE(TEXTURE_2D);
 577         if (Gr_scanline_darkening_level >= GR_FADE_LEVELS)
 578                 glColor3f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c));
 579         else
 580                 glColor4f(CPAL2Tr(c), CPAL2Tg(c), CPAL2Tb(c), 1.0 - (float)Gr_scanline_darkening_level / ((float)GR_FADE_LEVELS - 1.0));
 581         glBegin(GL_QUADS);
 582         glVertex2f(xo,yo);
 583         glVertex2f(xo,yf);
 584         glVertex2f(xf,yf);
 585         glVertex2f(xf,yo);
 586         glEnd();
 587 }
 588 void ogl_ulinec(int left,int top,int right,int bot,int c){
 589         GLfloat xo,yo,xf,yf;
 590
 591         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 592         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 593         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 594         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 595
 596         OGL_DISABLE(TEXTURE_2D);
 597         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 598         glBegin(GL_LINES);
 599         glVertex2f(xo,yo);
 600         glVertex2f(xf,yf);
 601         glEnd();
 602 }
 603
 604
 605 GLfloat last_r=0, last_g=0, last_b=0;
 606 int do_pal_step=0;
 607 void ogl_do_palfx(void){
 608 //      GLfloat r,g,b,a;
 609         OGL_DISABLE(TEXTURE_2D);
 610         if (gr_palette_faded_out){
 611 /*              glEnable(GL_BLEND);
 612                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 613                 glColor3f(0,0,0);
 614 //              r=g=b=0.0;a=1.0;
 615         }else{
 616                 if (do_pal_step){
 617                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 618                         glEnable(GL_BLEND);
 619                         glBlendFunc(GL_ONE,GL_ONE);
 620                         glColor3f(last_r,last_g,last_b);
 621 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 622                 }else
 623                         return;
 624         }
 625
 626
 627         glBegin(GL_QUADS);
 628         glVertex2f(0,0);
 629         glVertex2f(0,1);
 630         glVertex2f(1,1);
 631         glVertex2f(1,0);
 632         glEnd();
 633
 634         glEnable(GL_BLEND);
 635         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 636 }
 637
 638 void gr_palette_clear()
 639 {
 640         gr_palette_faded_out=1;
 641 }
 642
 643
 644 int ogl_brightness_ok = 0;
 645 int ogl_setgammaramp_ok = 1;
 646 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 647 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 648
 649 void gr_palette_step_up(int r, int g, int b)
 650 {
 651         if (gr_palette_faded_out)
 652                 return;
 653
 654         old_b_r = ogl_brightness_r;
 655         old_b_g = ogl_brightness_g;
 656         old_b_b = ogl_brightness_b;
 657
 658         ogl_brightness_r = max(r + gr_palette_gamma, 0);
 659         ogl_brightness_g = max(g + gr_palette_gamma, 0);
 660         ogl_brightness_b = max(b + gr_palette_gamma, 0);
 661
 662         if (ogl_setgammaramp_ok &&
 663             (old_b_r != ogl_brightness_r ||
 664              old_b_g != ogl_brightness_g ||
 665              old_b_b != ogl_brightness_b))
 666                 ogl_brightness_ok = !ogl_setbrightness_internal();
 667
 668         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 669         {
 670                 last_r = ogl_brightness_r / 63.0;
 671                 last_g = ogl_brightness_g / 63.0;
 672                 last_b = ogl_brightness_b / 63.0;
 673
 674                 do_pal_step = (r || g || b || gr_palette_gamma);
 675         }
 676         else
 677         {
 678                 do_pal_step = 0;
 679         }
 680 }
 681
 682 //added on 980913 by adb to fix palette problems
 683 // need a min without side effects...
 684 #undef min
 685 static inline int min(int x, int y) { return x < y ? x : y; }
 686 //end changes by adb
 687
 688 void gr_palette_load( ubyte *pal )
 689 {
 690  int i;//, j;
 691
 692  for (i=0; i<768; i++ ) {
 693      gr_current_pal[i] = pal[i];
 694      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 695  }
 696  //palette = screen->format->palette;
 697
 698  gr_palette_faded_out=0;
 699
 700         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 701
 702  init_computed_colors();
 703
 704         ogl_init_shared_palette();
 705 }
 706
 707
 708
 709 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 710 {
 711         gr_palette_faded_out=1;
 712         return 0;
 713 }
 714
 715
 716
 717 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 718 {
 719         gr_palette_faded_out=0;
 720         return 0;
 721 }
 722
 723
 724
 725 void gr_palette_read(ubyte * pal)
 726 {
 727         int i;
 728         for (i=0; i<768; i++ ) {
 729                 pal[i]=gr_current_pal[i];
 730                 if (pal[i] > 63) pal[i] = 63;
 731         }
 732 }
 733
 734 //writes out an uncompressed RGB .tga file
 735 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 736 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 737         PHYSFS_file *f;
 738
 739         f = PHYSFSX_openWriteBuffered(savename);
 740
 741         if (f>=0){
 742                 GLubyte    targaMagic[12] = { 0, //no identification field
 743                          0,//no colormap
 744                          2,//RGB image (well, BGR, actually)
 745                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 746                 GLubyte blah;
 747                 int r;
 748                 GLubyte *s;
 749                 int x,y;
 750
 751                 //write .TGA header.
 752                 PHYSFS_write(f, targaMagic, sizeof(targaMagic), 1);
 753                 PHYSFS_writeSLE32(f, w);
 754                 PHYSFS_writeSLE32(f, h);
 755                 PHYSFSX_writeU8(f, 24); // 24 bpp
 756                 PHYSFSX_writeU8(f, 0);  // no attribute bits, origin is lowerleft, no interleave
 757
 758                 s=buf;
 759                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 760                         for (x=0;x<w;x++){
 761                                 blah=s[0];
 762                                 s[0]=s[2];
 763                                 s[2]=blah;
 764                                 s+=3;
 765                         }
 766                 }
 767                 x=0;y=w*h*3;
 768                 while (y > 0)
 769                 {
 770                         r = PHYSFS_write(f, buf + x, 1, y);
 771                         if (r<=0){
 772                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 773                                 break;
 774                         }
 775                         x+=r;y-=r;
 776                 }
 777                 PHYSFS_close(f);
 778         }else{
 779                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 780         }
 781 }
 782 void save_screen_shot(int automap_flag)
 783 {
 784 //      fix t1;
 785         char message[100];
 786         static int savenum=0;
 787         char savename[13];
 788         unsigned char *buf;
 789
 790         if (!ogl_readpixels_ok){
 791                 if (!automap_flag)
 792                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 793                 return;
 794         }
 795
 796         stop_time();
 797
 798 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 799         if ( savenum == 9999 ) savenum = 0;
 800         sprintf(savename,"scrn%04d.tga",savenum++);
 801
 802         while(!access(savename,0))
 803         {
 804                 if ( savenum == 9999 ) savenum = 0;
 805                 sprintf(savename,"scrn%04d.tga",savenum++);
 806         }
 807         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 808 //end this section addition/change - Victor Rachels
 809
 810         if (automap_flag) {
 811 //      save_font = grd_curcanv->cv_font;
 812 //      gr_set_curfont(GAME_FONT);
 813 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 814 //      gr_get_string_size(message,&w,&h,&aw);
 815 //              modex_print_message(32, 2, message);
 816         } else {
 817                 hud_message(MSGC_GAME_FEEDBACK,message);
 818         }
 819
 820         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 821         glReadBuffer(GL_FRONT);
 822         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 823         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 824         d_free(buf);
 825
 826         key_flush();
 827         start_time();
 828 }