arch/ogl/gr.c

   1 /* $Id: gr.c,v 1.27 2004-05-22 08:42:59 btb Exp $ */
   2 /*
   3  *
   4  * OGL video functions. - Added 9/15/99 Matthew Mueller
   5  *
   6  *
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <conf.h>
  11 #endif
  12
  13 #include <stdlib.h>
  14 #include <stdio.h>
  15 #include <string.h>
  16 #ifdef _MSC_VER
  17 #include <windows.h>
  18 #endif
  19
  20 #if defined(__APPLE__) && defined(__MACH__)
  21 //#include <OpenGL/gl.h>
  22 #else
  23 //#include <GL/gl.h>
  24 #endif
  25 #ifndef _MSC_VER
  26 #include <unistd.h>
  27 #endif
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fcntl.h>
  31 #include <errno.h>
  32
  33 #include "hudmsg.h"
  34 #include "game.h"
  35 #include "text.h"
  36 #include "gr.h"
  37 #include "gamefont.h"
  38 #include "grdef.h"
  39 #include "palette.h"
  40 #include "u_mem.h"
  41 #include "error.h"
  42
  43 #include "inferno.h"
  44 #include "screens.h"
  45
  46 #include "strutil.h"
  47 #include "mono.h"
  48 #include "args.h"
  49 #include "key.h"
  50
  51 #define DECLARE_VARS
  52 #include "internal.h"
  53 #if defined(__APPLE__) && defined(__MACH__)
  54 #include <OpenGL/glu.h>
  55 #undef GL_ARB_multitexture // hack!
  56 #else
  57 #include <GL/glu.h>
  58 #endif
  59
  60 int ogl_voodoohack=0;
  61
  62 int gr_installed = 0;
  63
  64
  65 void gr_palette_clear(); // Function prototype for gr_init;
  66 int gl_initialized=0;
  67 int gl_reticle = 0;
  68
  69 int ogl_fullscreen=0;
  70
  71 int gr_check_fullscreen(void){
  72         return ogl_fullscreen;
  73 }
  74
  75 void gr_do_fullscreen(int f){
  76         if (ogl_voodoohack)
  77                 ogl_fullscreen=1;//force fullscreen mode on voodoos.
  78         else
  79                 ogl_fullscreen=f;
  80         if (gl_initialized){
  81                 ogl_do_fullscreen_internal();
  82         }
  83 }
  84
  85 int gr_toggle_fullscreen(void){
  86         gr_do_fullscreen(!ogl_fullscreen);
  87         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
  88         return ogl_fullscreen;
  89 }
  90
  91 int arch_toggle_fullscreen_menu(void){
  92         unsigned char *buf=NULL;
  93
  94         if (ogl_readpixels_ok){
  95                 MALLOC(buf,unsigned char,grd_curscreen->sc_w*grd_curscreen->sc_h*3);
  96                 glReadBuffer(GL_FRONT);
  97                 glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
  98         }
  99
 100         gr_do_fullscreen(!ogl_fullscreen);
 101
 102         if (ogl_readpixels_ok){
 103 //              glWritePixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 104                 glRasterPos2f(0,0);
 105                 glDrawPixels(grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 106                 free(buf);
 107         }
 108         //      grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
 109
 110         return ogl_fullscreen;
 111 }
 112
 113 void ogl_init_state(void){
 114         /* select clearing (background) color   */
 115         glClearColor(0.0, 0.0, 0.0, 0.0);
 116         glShadeModel(GL_SMOOTH);
 117
 118         /* initialize viewing values */
 119         glMatrixMode(GL_PROJECTION);
 120         glLoadIdentity();
 121         glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 122         glScalef(1.0, -1.0, 1.0);
 123         glTranslatef(0.0, -1.0, 0.0);
 124         gr_palette_step_up(0,0,0);//in case its left over from in game
 125 }
 126
 127 int last_screen_mode=-1;
 128
 129 void ogl_set_screen_mode(void){
 130         if (last_screen_mode==Screen_mode)
 131                 return;
 132         OGL_VIEWPORT(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h);
 133 //      OGL_VIEWPORT(grd_curcanv->cv_bitmap.bm_x,grd_curcanv->cv_bitmap.bm_y,grd_curcanv->cv_bitmap.bm_w,grd_curcanv->cv_bitmap.bm_h);
 134         if (Screen_mode==SCREEN_GAME){
 135                 glDrawBuffer(GL_BACK);
 136         }else{
 137                 glClearColor(0.0, 0.0, 0.0, 0.0);
 138                 glDrawBuffer(GL_FRONT);
 139                 glClear(GL_COLOR_BUFFER_BIT);
 140                 glMatrixMode(GL_PROJECTION);
 141                 glLoadIdentity();//clear matrix
 142                 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
 143                 glMatrixMode(GL_MODELVIEW);
 144                 glLoadIdentity();//clear matrix
 145                 glEnable(GL_BLEND);
 146                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 147         }
 148         last_screen_mode=Screen_mode;
 149 }
 150
 151 void gr_update()
 152 {
 153         if (gl_initialized){
 154
 155                 if(Screen_mode != SCREEN_GAME){
 156                         glFlush();
 157                 }
 158         }
 159 }
 160
 161 const char *gl_vendor,*gl_renderer,*gl_version,*gl_extensions;
 162
 163 void ogl_get_verinfo(void)
 164 {
 165         int t, arb_max_textures = -1, sgi_max_textures = -1;
 166         float anisotropic_max = 0;
 167
 168         gl_vendor=glGetString(GL_VENDOR);
 169         gl_renderer=glGetString(GL_RENDERER);
 170         gl_version=glGetString(GL_VERSION);
 171         gl_extensions=glGetString(GL_EXTENSIONS);
 172
 173         con_printf(CON_VERBOSE, "gl vendor:%s renderer:%s version:%s extensions:%s\n",gl_vendor,gl_renderer,gl_version,gl_extensions);
 174
 175         ogl_intensity4_ok = 1;
 176         ogl_luminance4_alpha4_ok = 1;
 177         ogl_rgba2_ok = 1;
 178         ogl_gettexlevelparam_ok = 1;
 179         ogl_setgammaramp_ok = 1;
 180
 181 #ifdef WGL_VIDEO
 182         dglMultiTexCoord2fARB = (glMultiTexCoord2fARB_fp)wglGetProcAddress("glMultiTexCoord2fARB");
 183         dglActiveTextureARB = (glActiveTextureARB_fp)wglGetProcAddress("glActiveTextureARB");
 184         dglMultiTexCoord2fSGIS = (glMultiTexCoord2fSGIS_fp)wglGetProcAddress("glMultiTexCoord2fSGIS");
 185         dglSelectTextureSGIS = (glSelectTextureSGIS_fp)wglGetProcAddress("glSelectTextureSGIS");
 186         dglColorTableEXT = (glColorTableEXT_fp)wglGetProcAddress("glColorTableEXT");
 187 #endif
 188
 189 #ifdef GL_ARB_multitexture
 190         ogl_arb_multitexture_ok = (strstr(gl_extensions, "GL_ARB_multitexture") != 0 && glActiveTextureARB != 0);
 191         mprintf((0,"c:%p d:%p e:%p\n",strstr(gl_extensions,"GL_ARB_multitexture"),glActiveTextureARB,glBegin));
 192 #endif
 193 #ifdef GL_SGIS_multitexture
 194         ogl_sgis_multitexture_ok = (strstr(gl_extensions, "GL_SGIS_multitexture") != 0 && glSelectTextureSGIS != 0);
 195         mprintf((0,"a:%p b:%p\n",strstr(gl_extensions,"GL_SGIS_multitexture"),glSelectTextureSGIS));
 196 #endif
 197         ogl_nv_texture_env_combine4_ok = (strstr(gl_extensions, "GL_NV_texture_env_combine4") != 0);
 198
 199         ogl_ext_texture_filter_anisotropic_ok = (strstr(gl_extensions, "GL_EXT_texture_filter_anisotropic") != 0);
 200         if (ogl_ext_texture_filter_anisotropic_ok)
 201                 glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropic_max);
 202
 203 #ifdef GL_EXT_paletted_texture
 204         ogl_paletted_texture_ok = (strstr(gl_extensions, "GL_EXT_paletted_texture") != 0 && glColorTableEXT != 0);
 205         ogl_shared_palette_ok = (strstr(gl_extensions, "GL_EXT_shared_texture_palette") != 0 && ogl_paletted_texture_ok);
 206 #endif
 207         //add driver specific hacks here.  whee.
 208         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){
 209                 ogl_intensity4_ok=0;//ignores alpha, always black background instead of transparent.
 210                 ogl_readpixels_ok=0;//either just returns all black, or kills the X server entirely
 211                 ogl_gettexlevelparam_ok=0;//returns random data..
 212         }
 213         if (stricmp(gl_vendor,"Matrox Graphics Inc.")==0){
 214                 //displays garbage. reported by
 215                 //  redomen@crcwnet.com (render="Matrox G400" version="1.1.3 5.52.015")
 216                 //  orulz (Matrox G200)
 217                 ogl_intensity4_ok=0;
 218         }
 219
 220         //allow overriding of stuff.
 221 #ifdef GL_ARB_multitexture
 222         if ((t=FindArg("-gl_arb_multitexture_ok"))){
 223                 ogl_arb_multitexture_ok=atoi(Args[t+1]);
 224         }
 225         if (ogl_arb_multitexture_ok)
 226                 glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &arb_max_textures);
 227 #endif
 228 #ifdef GL_SGIS_multitexture
 229         if ((t=FindArg("-gl_sgis_multitexture_ok"))){
 230                 ogl_sgis_multitexture_ok=atoi(Args[t+1]);
 231         }
 232         if (ogl_sgis_multitexture_ok)
 233                 glGetIntegerv(GL_MAX_TEXTURES_SGIS, &sgi_max_textures);
 234 #endif
 235 #ifdef GL_EXT_paletted_texture
 236         if ((t = FindArg("-gl_paletted_texture_ok")))
 237         {
 238                 ogl_paletted_texture_ok = atoi(Args[t + 1]);
 239         }
 240         if ((t = FindArg("-gl_shared_palette_ok")))
 241         {
 242                 ogl_shared_palette_ok = atoi(Args[t + 1]);
 243         }
 244         ogl_shared_palette_ok = ogl_shared_palette_ok && ogl_paletted_texture_ok; // shared palettes require palette support in the first place, obviously ;)
 245         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);
 246 #endif
 247         if ((t=FindArg("-gl_intensity4_ok"))){
 248                 ogl_intensity4_ok=atoi(Args[t+1]);
 249         }
 250         if ((t=FindArg("-gl_luminance4_alpha4_ok"))){
 251                 ogl_luminance4_alpha4_ok=atoi(Args[t+1]);
 252         }
 253         if ((t=FindArg("-gl_rgba2_ok"))){
 254                 ogl_rgba2_ok=atoi(Args[t+1]);
 255         }
 256         if ((t=FindArg("-gl_readpixels_ok"))){
 257                 ogl_readpixels_ok=atoi(Args[t+1]);
 258         }
 259         if ((t=FindArg("-gl_gettexlevelparam_ok"))){
 260                 ogl_gettexlevelparam_ok=atoi(Args[t+1]);
 261         }
 262         if ((t=FindArg("-gl_setgammaramp_ok")))
 263         {
 264                 ogl_setgammaramp_ok = atoi(Args[t + 1]);
 265         }
 266
 267         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);
 268         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);
 269 }
 270
 271
 272 int gr_check_mode(u_int32_t mode)
 273 {
 274         int w, h;
 275
 276         w = SM_W(mode);
 277         h = SM_H(mode);
 278         return ogl_check_mode(w, h); // platform specific code
 279 }
 280
 281
 282 extern int VGA_current_mode; // DPH: kludge - remove at all costs
 283
 284 int gr_set_mode(u_int32_t mode)
 285 {
 286         unsigned int w,h;
 287         char *gr_bm_data;
 288
 289 #ifdef NOGRAPH
 290 return 0;
 291 #endif
 292 //      mode=0;
 293         if (mode<=0)
 294                 return 0;
 295
 296         w=SM_W(mode);
 297         h=SM_H(mode);
 298         VGA_current_mode = mode;
 299
 300         //if (screen != NULL) gr_palette_clear();
 301
 302 //      ogl_init_state();
 303
 304         gr_bm_data=grd_curscreen->sc_canvas.cv_bitmap.bm_data;//since we use realloc, we want to keep this pointer around.
 305         memset( grd_curscreen, 0, sizeof(grs_screen));
 306         grd_curscreen->sc_mode = mode;
 307         grd_curscreen->sc_w = w;
 308         grd_curscreen->sc_h = h;
 309         grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
 310         grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
 311         grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
 312         grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
 313         grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
 314         //grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
 315         grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = w;
 316         grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_OGL;
 317         //grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
 318 //      mprintf((0,"ogl/gr.c: reallocing %p to %i\n",grd_curscreen->sc_canvas.cv_bitmap.bm_data,w*h));
 319         grd_curscreen->sc_canvas.cv_bitmap.bm_data = d_realloc(gr_bm_data,w*h);
 320         gr_set_current_canvas(NULL);
 321         //gr_enable_default_palette_loading();
 322
 323         ogl_init_window(w,h);//platform specific code
 324
 325         ogl_get_verinfo();
 326
 327         OGL_VIEWPORT(0,0,w,h);
 328
 329         ogl_set_screen_mode();
 330
 331 //      gamefont_choose_game_font(w,h);
 332
 333         return 0;
 334 }
 335
 336 #define GLstrcmptestr(a,b) if (stricmp(a,#b)==0 || stricmp(a,"GL_" #b)==0)return GL_ ## b;
 337 int ogl_atotexfilti(char *a,int min){
 338         GLstrcmptestr(a,NEAREST);
 339         GLstrcmptestr(a,LINEAR);
 340         if (min){//mipmaps are valid only for the min filter
 341                 GLstrcmptestr(a,NEAREST_MIPMAP_NEAREST);
 342                 GLstrcmptestr(a,NEAREST_MIPMAP_LINEAR);
 343                 GLstrcmptestr(a,LINEAR_MIPMAP_NEAREST);
 344                 GLstrcmptestr(a,LINEAR_MIPMAP_LINEAR);
 345         }
 346         Error("unknown/invalid texture filter %s\n",a);
 347 //      return GL_NEAREST;
 348 }
 349 int ogl_testneedmipmaps(int i){
 350         switch (i){
 351                 case GL_NEAREST:
 352                 case GL_LINEAR:
 353                         return 0;
 354                 case GL_NEAREST_MIPMAP_NEAREST:
 355                 case GL_NEAREST_MIPMAP_LINEAR:
 356                 case GL_LINEAR_MIPMAP_NEAREST:
 357                 case GL_LINEAR_MIPMAP_LINEAR:
 358                         return 1;
 359         }
 360         Error("unknown texture filter %x\n",i);
 361 //      return -1;
 362 }
 363 #ifdef OGL_RUNTIME_LOAD
 364 #ifdef _WIN32
 365 char *OglLibPath="opengl32.dll";
 366 #endif
 367 #ifdef __unix__
 368 char *OglLibPath="libGL.so";
 369 #endif
 370
 371 int ogl_rt_loaded=0;
 372 int ogl_init_load_library(void)
 373 {
 374         int retcode=0;
 375         if (!ogl_rt_loaded){
 376                 int t;
 377                 if ((t=FindArg("-gl_library")))
 378                         OglLibPath=Args[t+1];
 379
 380                 retcode = OpenGL_LoadLibrary(true);
 381                 if(retcode)
 382                 {
 383                         mprintf((0,"Opengl loaded ok\n"));
 384
 385                         if(!glEnd)
 386                         {
 387                                 Error("Opengl: Functions not imported\n");
 388                         }
 389                 }else{
 390                         Error("Opengl: error loading %s\n",OglLibPath);
 391                 }
 392                 ogl_rt_loaded=1;
 393         }
 394         return retcode;
 395 }
 396 #endif
 397
 398 int gr_init()
 399 {
 400         int mode = SM(640,480);
 401         int retcode, t, glt = 0;
 402
 403         // Only do this function once!
 404         if (gr_installed==1)
 405                 return -1;
 406
 407
 408 #ifdef OGL_RUNTIME_LOAD
 409         ogl_init_load_library();
 410 #endif
 411
 412 #ifdef GR_SUPPORTS_FULLSCREEN_TOGGLE
 413         if (FindArg("-gl_voodoo")){
 414                 ogl_voodoohack=1;
 415                 gr_toggle_fullscreen();
 416         }
 417         if (FindArg("-fullscreen"))
 418                 gr_toggle_fullscreen();
 419 #endif
 420         if ((glt=FindArg("-gl_alttexmerge")))
 421                 ogl_alttexmerge=1;
 422         if ((t=FindArg("-gl_stdtexmerge")))
 423                 if (t>=glt)//allow overriding of earlier args
 424                         ogl_alttexmerge=0;
 425
 426         if ((glt=FindArg("-gl_16bittextures")))
 427                 ogl_rgba_format=GL_RGB5_A1;
 428
 429         if ((glt=FindArg("-gl_mipmap"))){
 430                 GL_texmagfilt=GL_LINEAR;
 431                 GL_texminfilt=GL_LINEAR_MIPMAP_NEAREST;
 432         }
 433         if ((glt=FindArg("-gl_trilinear")))
 434         {
 435                 GL_texmagfilt = GL_LINEAR;
 436                 GL_texminfilt = GL_LINEAR_MIPMAP_LINEAR;
 437         }
 438         if ((t=FindArg("-gl_simple"))){
 439                 if (t>=glt){//allow overriding of earlier args
 440                         glt=t;
 441                         GL_texmagfilt=GL_NEAREST;
 442                         GL_texminfilt=GL_NEAREST;
 443                 }
 444         }
 445         if ((t=FindArg("-gl_texmagfilt")) || (t=FindArg("-gl_texmagfilter"))){
 446                 if (t>=glt)//allow overriding of earlier args
 447                         GL_texmagfilt=ogl_atotexfilti(Args[t+1],0);
 448         }
 449         if ((t=FindArg("-gl_texminfilt")) || (t=FindArg("-gl_texminfilter"))){
 450                 if (t>=glt)//allow overriding of earlier args
 451                         GL_texminfilt=ogl_atotexfilti(Args[t+1],1);
 452         }
 453         GL_needmipmaps=ogl_testneedmipmaps(GL_texminfilt);
 454
 455         if ((t = FindArg("-gl_anisotropy")) || (t = FindArg("-gl_anisotropic")))
 456         {
 457                 GL_texanisofilt=atof(Args[t + 1]);
 458         }
 459
 460         mprintf((0,"gr_init: texmagfilt:%x texminfilt:%x needmipmaps=%i anisotropic:%f\n",GL_texmagfilt,GL_texminfilt,GL_needmipmaps,GL_texanisofilt));
 461
 462
 463         if ((t=FindArg("-gl_vidmem"))){
 464                 ogl_mem_target=atoi(Args[t+1])*1024*1024;
 465         }
 466         if ((t=FindArg("-gl_reticle"))){
 467                 gl_reticle=atoi(Args[t+1]);
 468         }
 469         //printf("ogl_mem_target=%i\n",ogl_mem_target);
 470
 471         ogl_init();//platform specific initialization
 472
 473         ogl_init_texture_list_internal();
 474
 475         MALLOC( grd_curscreen,grs_screen,1 );
 476         memset( grd_curscreen, 0, sizeof(grs_screen));
 477         grd_curscreen->sc_canvas.cv_bitmap.bm_data = NULL;
 478
 479         // Set the mode.
 480         if ((retcode=gr_set_mode(mode)))
 481         {
 482                 return retcode;
 483         }
 484
 485         grd_curscreen->sc_canvas.cv_color = 0;
 486         grd_curscreen->sc_canvas.cv_drawmode = 0;
 487         grd_curscreen->sc_canvas.cv_font = NULL;
 488         grd_curscreen->sc_canvas.cv_font_fg_color = 0;
 489         grd_curscreen->sc_canvas.cv_font_bg_color = 0;
 490         gr_set_current_canvas( &grd_curscreen->sc_canvas );
 491
 492         gr_installed = 1;
 493
 494         atexit(gr_close);
 495
 496         return 0;
 497 }
 498
 499 void gr_close()
 500 {
 501 //      mprintf((0,"ogl init: %s %s %s - %s\n",glGetString(GL_VENDOR),glGetString(GL_RENDERER),glGetString(GL_VERSION),glGetString,(GL_EXTENSIONS)));
 502
 503         ogl_close();//platform specific code
 504         if (grd_curscreen){
 505                 if (grd_curscreen->sc_canvas.cv_bitmap.bm_data)
 506                         d_free(grd_curscreen->sc_canvas.cv_bitmap.bm_data);
 507                 d_free(grd_curscreen);
 508         }
 509 #ifdef OGL_RUNTIME_LOAD
 510         if (ogl_rt_loaded)
 511                 OpenGL_LoadLibrary(false);
 512 #endif
 513 }
 514 extern int r_upixelc;
 515 void ogl_upixelc(int x, int y, int c){
 516         r_upixelc++;
 517 //      printf("gr_upixelc(%i,%i,%i)%i\n",x,y,c,Function_mode==FMODE_GAME);
 518 //      if(Function_mode != FMODE_GAME){
 519 //              grd_curcanv->cv_bitmap.bm_data[y*grd_curscreen->sc_canvas.cv_bitmap.bm_w+x]=c;
 520 //      }else{
 521                 OGL_DISABLE(TEXTURE_2D);
 522                 glPointSize(1.0);
 523                 glBegin(GL_POINTS);
 524 //              glBegin(GL_LINES);
 525 //      ogl_pal=gr_current_pal;
 526                 glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 527 //      ogl_pal=gr_palette;
 528                 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);
 529 //              glVertex2f(x/((float)last_width+1),1.0-y/((float)last_height+1));
 530                 glEnd();
 531 //      }
 532 }
 533 void ogl_urect(int left,int top,int right,int bot){
 534         GLfloat xo,yo,xf,yf;
 535         int c=COLOR;
 536
 537         xo=(left+grd_curcanv->cv_bitmap.bm_x)/(float)last_width;
 538         xf = (right + 1 + grd_curcanv->cv_bitmap.bm_x) / (float)last_width;
 539         yo=1.0-(top+grd_curcanv->cv_bitmap.bm_y)/(float)last_height;
 540         yf = 1.0 - (bot + 1 + grd_curcanv->cv_bitmap.bm_y) / (float)last_height;
 541
 542         OGL_DISABLE(TEXTURE_2D);
 543         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 544         glBegin(GL_QUADS);
 545         glVertex2f(xo,yo);
 546         glVertex2f(xo,yf);
 547         glVertex2f(xf,yf);
 548         glVertex2f(xf,yo);
 549         glEnd();
 550 }
 551 void ogl_ulinec(int left,int top,int right,int bot,int c){
 552         GLfloat xo,yo,xf,yf;
 553
 554         xo = (left + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 555         xf = (right + grd_curcanv->cv_bitmap.bm_x + 0.5) / (float)last_width;
 556         yo = 1.0 - (top + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 557         yf = 1.0 - (bot + grd_curcanv->cv_bitmap.bm_y + 0.5) / (float)last_height;
 558
 559         OGL_DISABLE(TEXTURE_2D);
 560         glColor3f(CPAL2Tr(c),CPAL2Tg(c),CPAL2Tb(c));
 561         glBegin(GL_LINES);
 562         glVertex2f(xo,yo);
 563         glVertex2f(xf,yf);
 564         glEnd();
 565 }
 566
 567
 568 GLfloat last_r=0, last_g=0, last_b=0;
 569 int do_pal_step=0;
 570 void ogl_do_palfx(void){
 571 //      GLfloat r,g,b,a;
 572         OGL_DISABLE(TEXTURE_2D);
 573         if (gr_palette_faded_out){
 574 /*              glEnable(GL_BLEND);
 575                 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);*/
 576                 glColor3f(0,0,0);
 577 //              r=g=b=0.0;a=1.0;
 578         }else{
 579                 if (do_pal_step){
 580                         //glBlendFunc(GL_SRC_COLOR, GL_DST_COLOR);
 581                         glEnable(GL_BLEND);
 582                         glBlendFunc(GL_ONE,GL_ONE);
 583                         glColor3f(last_r,last_g,last_b);
 584 //                      r=f2fl(last_r);g=f2fl(last_g);b=f2fl(last_b);a=0.5;
 585                 }else
 586                         return;
 587         }
 588
 589
 590         glBegin(GL_QUADS);
 591         glVertex2f(0,0);
 592         glVertex2f(0,1);
 593         glVertex2f(1,1);
 594         glVertex2f(1,0);
 595         glEnd();
 596
 597         glEnable(GL_BLEND);
 598         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 599 }
 600
 601 void gr_palette_clear()
 602 {
 603         gr_palette_faded_out=1;
 604 }
 605
 606
 607 int ogl_brightness_ok = 0;
 608 int ogl_setgammaramp_ok = 1;
 609 int ogl_brightness_r = 0, ogl_brightness_g = 0, ogl_brightness_b = 0;
 610 static int old_b_r = 0, old_b_g = 0, old_b_b = 0;
 611
 612 void gr_palette_step_up(int r, int g, int b)
 613 {
 614         if (gr_palette_faded_out)
 615                 return;
 616
 617         old_b_r = ogl_brightness_r;
 618         old_b_g = ogl_brightness_g;
 619         old_b_b = ogl_brightness_b;
 620
 621         ogl_brightness_r = max(r + gr_palette_gamma, 0);
 622         ogl_brightness_g = max(g + gr_palette_gamma, 0);
 623         ogl_brightness_b = max(b + gr_palette_gamma, 0);
 624
 625         if (ogl_setgammaramp_ok &&
 626             (old_b_r != ogl_brightness_r ||
 627              old_b_g != ogl_brightness_g ||
 628              old_b_b != ogl_brightness_b))
 629                 ogl_brightness_ok = !ogl_setbrightness_internal();
 630
 631         if (!ogl_setgammaramp_ok || !ogl_brightness_ok)
 632         {
 633                 last_r = ogl_brightness_r / 63.0;
 634                 last_g = ogl_brightness_g / 63.0;
 635                 last_b = ogl_brightness_b / 63.0;
 636
 637                 do_pal_step = (r || g || b || gr_palette_gamma);
 638         }
 639         else
 640         {
 641                 do_pal_step = 0;
 642         }
 643 }
 644
 645 //added on 980913 by adb to fix palette problems
 646 // need a min without side effects...
 647 #undef min
 648 static inline int min(int x, int y) { return x < y ? x : y; }
 649 //end changes by adb
 650
 651 void gr_palette_load( ubyte *pal )
 652 {
 653  int i;//, j;
 654
 655  for (i=0; i<768; i++ ) {
 656      gr_current_pal[i] = pal[i];
 657      if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
 658  }
 659  //palette = screen->format->palette;
 660
 661  gr_palette_faded_out=0;
 662
 663         gr_palette_step_up(0, 0, 0); // make ogl_setbrightness_internal get run so that menus get brightened too.
 664
 665  init_computed_colors();
 666
 667         ogl_init_shared_palette();
 668 }
 669
 670
 671
 672 int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
 673 {
 674         gr_palette_faded_out=1;
 675         return 0;
 676 }
 677
 678
 679
 680 int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
 681 {
 682         gr_palette_faded_out=0;
 683         return 0;
 684 }
 685
 686
 687
 688 void gr_palette_read(ubyte * pal)
 689 {
 690         int i;
 691         for (i=0; i<768; i++ ) {
 692                 pal[i]=gr_current_pal[i];
 693                 if (pal[i] > 63) pal[i] = 63;
 694         }
 695 }
 696
 697 //writes out an uncompressed RGB .tga file
 698 //if we got really spiffy, we could optionally link in libpng or something, and use that.
 699 void write_bmp(char *savename,int w,int h,unsigned char *buf){
 700         int f;
 701 #ifdef _WIN32
 702         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IREAD|S_IWRITE);
 703 #else
 704         f=open(savename,O_CREAT|O_EXCL|O_WRONLY,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 705 #endif
 706         if (f>=0){
 707                 GLubyte    targaMagic[12] = { 0, //no identification field
 708                          0,//no colormap
 709                          2,//RGB image (well, BGR, actually)
 710                          0, 0, 0, 0, 0, 0, 0, 0, 0 };//no colormap or image origin stuff.
 711                 GLubyte blah;
 712                 int r;
 713                 GLubyte *s;
 714                 int x,y;
 715
 716                 //write .TGA header.
 717                 write (f,targaMagic,sizeof(targaMagic));
 718                 blah=w%256;write (f,&blah,1);//w, low
 719                 blah=w/256;write (f,&blah,1);//w, high
 720                 blah=h%256;write (f,&blah,1);//h, low
 721                 blah=h/256;write (f,&blah,1);//h, high
 722                 blah=24;write (f,&blah,1);//24 bpp
 723                 blah=0;write (f,&blah,1);//no attribute bits, origin is lowerleft, no interleave
 724
 725                 s=buf;
 726                 for (y=0;y<h;y++){//TGAs use BGR ordering of data.
 727                         for (x=0;x<w;x++){
 728                                 blah=s[0];
 729                                 s[0]=s[2];
 730                                 s[2]=blah;
 731                                 s+=3;
 732                         }
 733                 }
 734                 x=0;y=w*h*3;
 735                 while (y > 0)
 736                 {
 737                         r=write(f,buf+x,y);
 738                         if (r<=0){
 739                                 mprintf((0,"screenshot error, couldn't write to %s (err %i)\n",savename,errno));
 740                                 break;
 741                         }
 742                         x+=r;y-=r;
 743                 }
 744                 close(f);
 745         }else{
 746                 mprintf((0,"screenshot error, couldn't open %s (err %i)\n",savename,errno));
 747         }
 748 }
 749 void save_screen_shot(int automap_flag)
 750 {
 751 //      fix t1;
 752         char message[100];
 753         static int savenum=0;
 754         char savename[13];
 755         unsigned char *buf;
 756
 757         if (!ogl_readpixels_ok){
 758                 if (!automap_flag)
 759                         hud_message(MSGC_GAME_FEEDBACK,"glReadPixels not supported on your configuration");
 760                 return;
 761         }
 762
 763         stop_time();
 764
 765 //added/changed on 10/31/98 by Victor Rachels to fix overwrite each new game
 766         if ( savenum == 9999 ) savenum = 0;
 767         sprintf(savename,"scrn%04d.tga",savenum++);
 768
 769         while(!access(savename,0))
 770         {
 771                 if ( savenum == 9999 ) savenum = 0;
 772                 sprintf(savename,"scrn%04d.tga",savenum++);
 773         }
 774         sprintf( message, "%s '%s'", TXT_DUMPING_SCREEN, savename );
 775 //end this section addition/change - Victor Rachels
 776
 777         if (automap_flag) {
 778 //      save_font = grd_curcanv->cv_font;
 779 //      gr_set_curfont(GAME_FONT);
 780 //      gr_set_fontcolor(gr_find_closest_color_current(0,31,0),-1);
 781 //      gr_get_string_size(message,&w,&h,&aw);
 782 //              modex_print_message(32, 2, message);
 783         } else {
 784                 hud_message(MSGC_GAME_FEEDBACK,message);
 785         }
 786
 787         buf = d_malloc(grd_curscreen->sc_w*grd_curscreen->sc_h*3);
 788         glReadBuffer(GL_FRONT);
 789         glReadPixels(0,0,grd_curscreen->sc_w,grd_curscreen->sc_h,GL_RGB,GL_UNSIGNED_BYTE,buf);
 790         write_bmp(savename,grd_curscreen->sc_w,grd_curscreen->sc_h,buf);
 791         d_free(buf);
 792
 793         key_flush();
 794         start_time();
 795 }