vg.h

   1 /* Copyright (C) 2021-2023 Harry Godden (hgn) - All Rights Reserved */
   2
   3 /*
   4
   5  .-.                           VG Event loop
   6 | 0 |
   7 |   |  .---------------------------------------------------------.
   8 |API| | vg_enter( int argc, char *argv[], const char *window_name |
   9 |   |  '---------------------------------------------------------'
  10 |   |        |
  11 |   |        v
  12 |IMP|  vg_launch_opt(void) <--.
  13 |   |        |                 |
  14 |   |        |'---------------'
  15 |   |        |                                     .-.
  16 |   |        |'-----------------------------------| 1 |------.
  17 |   |        |                                    |   |       |
  18 |   |        |                                    |   |       v
  19 |   |        |                                    |IMP|  vg_preload(void)
  20 |   |        |                                    |   |       |
  21 |   |  .-----+.                                   |   |       v
  22 |   | |        |                                  |IMP|  vg_load(void)
  23 |   | |        v                                  '___'       |
  24 |IMP| |   vg_framebuffer_resize(void)                         |
  25 |   | |        |                                              |
  26 |IMP| |        |.------------- vg_start(void) ---------------'
  27 |   | |        |
  28 |   | |        v
  29 |IMP| |   vg_update(void)
  30 |   | |        |
  31 |   | |  .-----+.
  32 |   | | |        |
  33 |   | | |        v
  34 |IMP| |  '- vg_update_fixed(void)
  35 |   | |          |
  36 |   | |       .-'
  37 |   | |      |
  38 |   | |      v
  39 |IMP| |   vg_update_post(void)
  40 |   | |      |
  41 |   | |      v
  42 |IMP| |   vg_render(void)
  43 |   | |      |
  44 |   | |      v
  45 |IMP| |   vg_ui(void)
  46 |   | |      |
  47 |   |  '----'
  48 '___'
  49
  50 */
  51
  52 #ifndef VG_HEADER_H
  53   #define VG_HEADER_H
  54
  55   const char *vg_get_basepath(void);
  56
  57   #include "vg_platform.h"
  58   #include "vg_mem.h"
  59
  60   #ifdef VG_GAME
  61     #include "dep/glad/glad.h"
  62     #include "dep/sdl/include/SDL.h"
  63     #include "vg_stdint.h"
  64
  65     void vg_register_exit( void( *funcptr )(void), const char *name );
  66
  67     #include "vg_m.h"
  68     #include "vg_io.h"
  69     #include "vg_log.h"
  70     #include "vg_steam.h"
  71
  72   //#define VG_SYNC_DEBUG
  73   #ifdef VG_SYNC_DEBUG
  74     #define VG_SYNC_LOG(STR,...) \
  75        vg_info(STR,SDL_GetThreadID(NULL),##__VA_ARGS__)
  76   #else
  77     #define VG_SYNC_LOG(...)
  78   #endif
  79
  80 /* API */
  81 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name );
  82
  83 /* Thread 1 */
  84 VG_STATIC void vg_preload(void);
  85 VG_STATIC void vg_load(void);
  86
  87 /* Main thread */
  88 VG_STATIC void vg_launch_opt(void);
  89 VG_STATIC void vg_start(void);
  90
  91 VG_STATIC void vg_framebuffer_resize(int w, int h);
  92 VG_STATIC void vg_update(void);
  93 VG_STATIC void vg_update_fixed(void);
  94 VG_STATIC void vg_update_post(void);
  95
  96 VG_STATIC void vg_render(void);
  97 VG_STATIC void vg_gui(void);
  98
  99 struct vg{
 100    /* Engine sync */
 101    SDL_Window     *window;
 102    SDL_GLContext  gl_context;
 103    const char     *base_path;
 104
 105    SDL_sem *sem_loader;        /* allows only one loader at a time */
 106    jmp_buf env_loader_exit;
 107
 108    SDL_threadID  thread_id_main,
 109                  thread_id_loader;
 110    void         *thread_data;
 111
 112    SDL_SpinLock sl_status;
 113    enum engine_status{
 114       k_engine_status_none,
 115       k_engine_status_load_internal,
 116       k_engine_status_running,
 117       k_engine_status_crashed
 118    }
 119    engine_status;
 120
 121    /* Window information */
 122    int window_x,
 123        window_y,
 124        samples,
 125        window_should_close;
 126
 127    int display_refresh_rate,
 128        fps_limit;             /* 0: use vsync, >0: cap fps to this, no vsync */
 129
 130    enum vsync_feature{
 131       k_vsync_feature_disabled=0,
 132       k_vsync_feature_enabled=1,
 133       k_vsync_feature_enabled_adaptive=2,
 134       k_vsync_feature_error=3
 135    }
 136    vsync_feature;
 137
 138    double mouse_pos[2];
 139    v2f mouse_delta,
 140        mouse_wheel;
 141
 142    /* Runtime */
 143    double time,
 144           time_delta,
 145           time_rate,
 146
 147           time_fixed_accumulator,
 148           time_fixed_extrapolate,
 149           time_frame_delta;
 150
 151    u64 time_hp, time_hp_last, time_spinning;
 152
 153    int fixed_iterations;
 154
 155    enum engine_stage{
 156       k_engine_stage_none,
 157       k_engine_stage_update,
 158       k_engine_stage_update_fixed,
 159       k_engine_stage_rendering,
 160       k_engine_stage_ui
 161    }
 162    engine_stage;
 163
 164    /* graphics */
 165    m4x4f pv;
 166    enum quality_profile{
 167       k_quality_profile_high = 0,
 168       k_quality_profile_low = 1,
 169    }
 170    quality_profile;
 171
 172    float loader_ring;
 173 }
 174 VG_STATIC vg = { .time_rate = 1.0 };
 175 const char *vg_get_basepath(void){
 176    return vg.base_path;
 177 }
 178
 179 enum vg_thread_purpose
 180 {
 181    k_thread_purpose_nothing,
 182    k_thread_purpose_main,
 183    k_thread_purpose_loader
 184 };
 185
 186 #include "vg_async.h"
 187
 188 VG_STATIC enum engine_status _vg_engine_status(void)
 189 {
 190    SDL_AtomicLock( &vg.sl_status );
 191    enum engine_status status = vg.engine_status;
 192    SDL_AtomicUnlock( &vg.sl_status );
 193
 194    return status;
 195 }
 196
 197 VG_STATIC enum vg_thread_purpose vg_thread_purpose(void)
 198 {
 199    SDL_AtomicLock( &vg.sl_status );
 200
 201    if( vg.thread_id_main == SDL_GetThreadID(NULL) ){
 202       SDL_AtomicUnlock( &vg.sl_status );
 203       return k_thread_purpose_main;
 204    }
 205    else{
 206       SDL_AtomicUnlock( &vg.sl_status );
 207       return k_thread_purpose_loader;
 208    }
 209 }
 210
 211 VG_STATIC void vg_assert_thread( enum vg_thread_purpose required ){
 212    enum vg_thread_purpose purpose = vg_thread_purpose();
 213
 214    if( purpose != required ){
 215       vg_fatal_error( "thread_purpose must be %u not %u\n", required, purpose );
 216    }
 217 }
 218
 219 VG_STATIC void _vg_opengl_sync_init(void)
 220 {
 221    vg.sem_loader = SDL_CreateSemaphore(1);
 222 }
 223
 224 VG_STATIC void vg_checkgl( const char *src_info );
 225 #define VG_STRINGIT( X ) #X
 226 #define VG_CHECK_GL_ERR() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
 227
 228 #include "vg_console.h"
 229 #include "vg_profiler.h"
 230 #include "vg_audio.h"
 231 #include "vg_shader.h"
 232 #include "vg_tex.h"
 233 #include "vg_input.h"
 234 #include "vg_imgui.h"
 235 #include "vg_lines.h"
 236 #include "vg_loader.h"
 237 #include "vg_opt.h"
 238
 239 /* Diagnostic */
 240 VG_STATIC struct vg_profile vg_prof_update = {.name="update()"},
 241                             vg_prof_render = {.name="render()"},
 242                             vg_prof_swap   = {.name="swap"};
 243
 244 VG_STATIC void vg_checkgl( const char *src_info )
 245 {
 246    int fail = 0;
 247
 248    GLenum err;
 249    while( (err = glGetError()) != GL_NO_ERROR ){
 250       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
 251       fail = 1;
 252    }
 253
 254    if( fail )
 255       vg_fatal_error( "OpenGL Error" );
 256 }
 257
 258 VG_STATIC void async_vg_bake_shaders( void *payload, u32 size )
 259 {
 260    vg_shaders_compile();
 261 }
 262
 263 VG_STATIC void vg_bake_shaders(void)
 264 {
 265    vg_console_reg_cmd( "reload_shaders", vg_shaders_live_recompile, NULL );
 266    vg_async_call( async_vg_bake_shaders, NULL, 0 );
 267 }
 268
 269 void async_internal_complete( void *payload, u32 size )
 270 {
 271    vg_success( "Internal async setup complete\n" );
 272    SDL_AtomicLock( &vg.sl_status );
 273
 274    if( vg.engine_status == k_engine_status_crashed ){
 275       SDL_AtomicUnlock( &vg.sl_status );
 276       return;
 277    }
 278    else{
 279       vg.engine_status = k_engine_status_running;
 280    }
 281
 282    SDL_AtomicUnlock( &vg.sl_status );
 283 }
 284
 285 VG_STATIC void _vg_load_full( void *data )
 286 {
 287    vg_preload();
 288
 289    /* internal */
 290    vg_loader_step( vg_input_init, vg_input_free );
 291    vg_loader_step( vg_lines_init, NULL );
 292    vg_loader_step( vg_audio_init, vg_audio_free );
 293    vg_loader_step( vg_profiler_init, NULL );
 294
 295    vg_async_call( async_internal_complete, NULL, 0 );
 296
 297    /* client */
 298    vg_load();
 299 }
 300
 301 VG_STATIC void _vg_process_events(void)
 302 {
 303    v2_zero( vg.mouse_wheel );
 304    v2_zero( vg.mouse_delta );
 305
 306    /* Update input */
 307    vg_process_inputs();
 308
 309    /* SDL event loop */
 310    SDL_Event event;
 311    while( SDL_PollEvent( &event ) ){
 312       if( event.type == SDL_KEYDOWN ){
 313          if( vg_console.enabled &&
 314                (vg_ui.focused_control_type != k_ui_control_modal) ){
 315             if( event.key.keysym.sym == SDLK_ESCAPE ||
 316                 event.key.keysym.sym == SDLK_BACKQUOTE ){
 317                vg_console.enabled = 0;
 318                ui_defocus_all();
 319             }
 320             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 321                       event.key.keysym.sym == SDLK_n ){
 322                _console_suggest_next();
 323             }
 324             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 325                       event.key.keysym.sym == SDLK_p ){
 326                _console_suggest_prev();
 327             }
 328             else{
 329                _ui_proc_key( event.key.keysym );
 330             }
 331          }
 332          else{
 333             if( event.key.keysym.sym == SDLK_BACKQUOTE ){
 334                vg_console.enabled = 1;
 335             }
 336             else {
 337                _ui_proc_key( event.key.keysym );
 338             }
 339          }
 340       }
 341       else if( event.type == SDL_MOUSEWHEEL ){
 342          vg.mouse_wheel[0] += event.wheel.preciseX;
 343          vg.mouse_wheel[1] += event.wheel.preciseY;
 344       }
 345       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 346                event.type == SDL_CONTROLLERDEVICEREMOVED )
 347       {
 348          vg_input_device_event( &event );
 349       }
 350       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 351                event.type == SDL_CONTROLLERBUTTONDOWN ||
 352                event.type == SDL_CONTROLLERBUTTONUP )
 353       {
 354          vg_input_controller_event( &event );
 355       }
 356       else if( event.type == SDL_MOUSEMOTION ){
 357          vg.mouse_delta[0] += event.motion.xrel;
 358          vg.mouse_delta[1] += event.motion.yrel;
 359       }
 360       else if( event.type == SDL_WINDOWEVENT ){
 361          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 362             int w, h;
 363             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 364
 365             if( !w || !h ){
 366                vg_warn( "Got a invalid framebuffer size: "
 367                         "%dx%d... ignoring\n", w, h );
 368             }
 369             else{
 370                vg.window_x = w;
 371                vg.window_y = h;
 372
 373                vg_framebuffer_resize(w,h);
 374             }
 375          }
 376          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 377             vg.window_should_close = 1;
 378          }
 379       }
 380       else if( event.type == SDL_TEXTINPUT ){
 381          ui_proc_utf8( event.text.text );
 382       }
 383    }
 384
 385    vg.mouse_pos[0] += vg.mouse_delta[0];
 386    vg.mouse_pos[1] += vg.mouse_delta[1];
 387 }
 388
 389 VG_STATIC void _vg_gameloop_update(void)
 390 {
 391    vg_profile_begin( &vg_prof_update );
 392
 393    vg.engine_stage = k_engine_stage_update;
 394    vg_update();
 395
 396    /* Fixed update loop */
 397    vg.engine_stage = k_engine_stage_update_fixed;
 398
 399    vg.fixed_iterations = 0;
 400    vg_lines.allow_input = 1;
 401    vg.time_fixed_accumulator += vg.time_delta;
 402
 403    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 404       vg_update_fixed();
 405       vg_lines.allow_input = 0;
 406
 407       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 408       //vg.accumulator  = VG_MAX( 0.0, vg.accumulator );
 409
 410       vg.fixed_iterations ++;
 411       if( vg.fixed_iterations == 8 ){
 412          break;
 413       }
 414    }
 415    vg_lines.allow_input = 1;
 416    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 417
 418    vg.engine_stage = k_engine_stage_update;
 419    vg_update_post();
 420    vg_profile_end( &vg_prof_update );
 421 }
 422
 423 VG_STATIC void _vg_gameloop_render(void)
 424 {
 425    vg_profile_begin( &vg_prof_render );
 426
 427    /* render */
 428    vg.engine_stage = k_engine_stage_rendering;
 429    vg_render();
 430
 431    /* ui */
 432    vg.engine_stage = k_engine_stage_ui;
 433    {
 434       ui_prerender();
 435       if( vg_console.enabled ){
 436          vg_ui.ignore_input_frames = 10;
 437          vg_gui();
 438          vg_ui.ignore_input_frames = 0;
 439          vg_ui.wants_mouse = 1;
 440          _vg_console_draw();
 441       }
 442       else vg_gui();
 443
 444       /* vg tools */
 445       audio_debug_ui( vg.pv );
 446
 447                 /* profiling */
 448       int frame_target = vg.display_refresh_rate;
 449       if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 450       vg_profile_drawn(
 451             (struct vg_profile *[]){
 452                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 453             (1.0f/(float)frame_target)*1000.0f,
 454             (ui_rect){ 4, 4, 250, 0 }, 0
 455       );
 456       if( vg_profiler ){
 457          char perf[256];
 458
 459          snprintf( perf, 255,
 460                "x: %d y: %d\n"
 461                "refresh: %d (%.1fms)\n"
 462                "samples: %d\n"
 463                "iterations: %d (acc: %.3fms%%)\n"
 464                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 465                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 466                vg.window_x, vg.window_y,
 467                frame_target, (1.0f/(float)frame_target)*1000.0f,
 468                vg.samples,
 469                vg.fixed_iterations,
 470                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 471                vg.time, vg.time_delta, vg.time_rate,
 472                vg.time_fixed_extrapolate, vg.time_frame_delta,
 473                vg.time_spinning );
 474
 475          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 476       }
 477       ui_postrender();
 478    }
 479
 480    vg_profile_end( &vg_prof_render );
 481 }
 482
 483 VG_STATIC int vg_framefilter( double dt )
 484 {
 485    if( (vg.fps_limit <= 0) && (vg.vsync_feature != k_vsync_feature_error) ){
 486       /* turn on vsync if not enabled */
 487
 488       enum vsync_feature requested = k_vsync_feature_enabled;
 489       if( vg.fps_limit < 0 ) requested = k_vsync_feature_enabled_adaptive;
 490
 491       if( vg.vsync_feature != requested ){
 492          vg_info( "Setting swap interval\n" );
 493
 494          int swap_interval = 1;
 495          if( requested == k_vsync_feature_enabled_adaptive ) swap_interval = -1;
 496
 497          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 498             if( requested == k_vsync_feature_enabled ){
 499                vg_error( "Vsync is not supported by your system\n" );
 500                vg_warn( "You may be overriding it in your"
 501                         " graphics control panel.\n" );
 502             }
 503             else{
 504                vg_error( "Adaptive Vsync is not supported by your system\n" );
 505             }
 506
 507             vg.vsync_feature = k_vsync_feature_error;
 508             vg.fps_limit = vg.display_refresh_rate;
 509
 510             /* TODO: Make popup to notify user that this happened */
 511             return 1;
 512          }
 513          else{
 514             vg_success( "Vsync enabled (%d)\n", requested );
 515             vg.vsync_feature = requested;
 516          }
 517       }
 518
 519       return 0;
 520    }
 521
 522    if( vg.vsync_feature != k_vsync_feature_disabled ){
 523       SDL_GL_SetSwapInterval( 0 );
 524       vg.vsync_feature = k_vsync_feature_disabled;
 525    }
 526
 527    if( vg.fps_limit < 25 ) vg.fps_limit = 25;
 528    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 529
 530    double min_frametime = 1.0/(double)vg.fps_limit;
 531    if( vg.time_frame_delta < min_frametime ){
 532       /* TODO: we can use high res nanosleep on Linux here */
 533       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 534       u32 ms = (u32)floor( sleep_ms );
 535
 536       if( ms ){
 537          SDL_Delay( ms );
 538       }
 539       else{
 540          vg.time_spinning ++;
 541       }
 542
 543       return 1;
 544    }
 545
 546    return 0;
 547 }
 548
 549 VG_STATIC int _vg_crashscreen(void)
 550 {
 551 #if 0
 552    if( vg_getkey( SDLK_ESCAPE ) )
 553       return 1;
 554 #endif
 555
 556    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 557    glEnable(GL_BLEND);
 558    glDisable(GL_DEPTH_TEST);
 559    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 560    glBlendEquation(GL_FUNC_ADD);
 561
 562    glClearColor( 0.15f + sinf(vg.time)*0.1f, 0.0f, 0.0f,1.0f );
 563    glClear( GL_COLOR_BUFFER_BIT );
 564    glViewport( 0,0, vg.window_x, vg.window_y );
 565
 566    _vg_render_log();
 567
 568    return 0;
 569 }
 570
 571 VG_STATIC void _vg_gameloop(void)
 572 {
 573    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 574
 575    vg.time_hp = SDL_GetPerformanceCounter();
 576    vg.time_hp_last = vg.time_hp;
 577
 578    int post_start = 0;
 579    while(1){
 580
 581       vg.time_hp = SDL_GetPerformanceCounter();
 582       u64 udt = vg.time_hp - vg.time_hp_last;
 583       vg.time_hp_last = vg.time_hp;
 584
 585       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 586
 587       vg.time_frame_delta += dt;
 588
 589       if( vg_framefilter( dt ) )
 590          continue;
 591
 592       vg_profile_begin( &vg_prof_swap );
 593       SDL_GL_SwapWindow( vg.window );
 594       vg_profile_end( &vg_prof_swap );
 595
 596       enum engine_status status = _vg_engine_status();
 597
 598       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 599       vg.time += vg.time_delta;
 600
 601       vg_run_async_checked();
 602       _vg_process_events();
 603
 604       if( vg.window_should_close )
 605          break;
 606
 607       if( status == k_engine_status_crashed ){
 608          if( _vg_crashscreen() )
 609             break;
 610       }
 611       else{
 612          if( status == k_engine_status_running ){
 613             _vg_gameloop_update();
 614             _vg_gameloop_render();
 615          }
 616          else{
 617             _vg_loader_render();
 618          }
 619       }
 620
 621       if( vg.loader_ring > 0.01f ){
 622          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 623          _vg_loader_render_ring( vg.loader_ring );
 624       }
 625
 626       vg.time_frame_delta = 0.0;
 627       vg.time_spinning = 0;
 628    }
 629 }
 630
 631 VG_STATIC void _vg_process_launch_opts_internal( int argc, char *argv[] )
 632 {
 633    char *arg;
 634    while( vg_argp( argc, argv ) ){
 635       if( (arg = vg_opt_arg( 'w' )) ){
 636          vg.window_x = atoi( arg );
 637       }
 638
 639       if( (arg = vg_opt_arg( 'h' )) ){
 640          vg.window_y = atoi( arg );
 641       }
 642
 643       if( (arg = vg_long_opt_arg( "samples" )) ){
 644          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 645       }
 646
 647       if(  vg_long_opt( "use-libc-malloc" ) ){
 648          vg_mem.use_libc_malloc = 1;
 649       }
 650
 651       if( vg_long_opt( "high-performance" ) ){
 652          vg.quality_profile = k_quality_profile_low;
 653       }
 654
 655       vg_launch_opt();
 656    }
 657 }
 658
 659 VG_STATIC void _vg_init_window( const char *window_name )
 660 {
 661    vg_info( "SDL_INIT\n" );
 662
 663    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 664       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 665       exit(0);
 666    }
 667
 668    SDL_InitSubSystem( SDL_INIT_AUDIO );
 669    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 670
 671    char *exe_basepath = SDL_GetBasePath();
 672    u32 len = vg_align8( strlen(exe_basepath)+1 );
 673    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 674    strcpy( dest, exe_basepath );
 675    SDL_free( exe_basepath );
 676    vg.base_path = dest;
 677
 678    vg_info( "Basepath: %s\n", vg.base_path );
 679
 680    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 681    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 682    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 683    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 684                            SDL_GL_CONTEXT_PROFILE_CORE );
 685
 686    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 687                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 688
 689    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 690    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 691    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 692    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 693    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 694
 695    /*
 696     * Get monitor information
 697     */
 698    vg_info( "Getting display count\n" );
 699    int display_count = 0,
 700        display_index = 0,
 701        mode_index = 0;
 702
 703 #ifdef VG_DEVWINDOW
 704    vg.window_x = 1600;
 705    vg.window_y = 1000;
 706 #else
 707
 708    SDL_DisplayMode video_mode;
 709    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 710       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 711       SDL_Quit();
 712       exit(0);
 713    }
 714
 715    vg.display_refresh_rate = video_mode.refresh_rate;
 716    vg.window_x = video_mode.w;
 717    vg.window_y = video_mode.h;
 718 #endif
 719
 720 #ifndef _WIN32
 721         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 722         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 723         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 724 #endif
 725
 726    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 727                                              vg.display_refresh_rate );
 728
 729    /* TODO: Allow selecting closest video mode from launch opts */
 730    if((vg.window = SDL_CreateWindow( window_name,
 731
 732 #ifdef VG_DEVWINDOW
 733          0, 0, vg.window_x, vg.window_y,
 734          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL|SDL_WINDOW_INPUT_GRABBED
 735       ))){}
 736 #else
 737                                      0, 0,
 738                                      vg.window_x, vg.window_y,
 739
 740                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 741                                      SDL_WINDOW_OPENGL |
 742                                      SDL_WINDOW_INPUT_GRABBED
 743                                      )))
 744    {
 745       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 746          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 747          SDL_Quit();
 748          exit(0);
 749       }
 750    }
 751 #endif
 752    else{
 753       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 754       exit(0);
 755    }
 756
 757    SDL_RaiseWindow( vg.window );
 758
 759    vg_info( "CreateContext\n" );
 760
 761    /* ????? */
 762    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 763
 764    /*
 765     * OpenGL loading
 766     */
 767    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 768       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 769       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 770    }
 771    else{
 772       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 773       SDL_Quit();
 774       exit(0);
 775    }
 776
 777    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 778       vg_error( "Glad Failed to initialize\n" );
 779       SDL_GL_DeleteContext( vg.gl_context );
 780       SDL_Quit();
 781       exit(0);
 782    }
 783
 784    const unsigned char* glver = glGetString( GL_VERSION );
 785    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 786
 787    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 788
 789    SDL_DisplayMode dispmode;
 790    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 791       if( dispmode.refresh_rate ){
 792          vg.display_refresh_rate = dispmode.refresh_rate;
 793       }
 794    }
 795
 796    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 797       vg.display_refresh_rate = 60;
 798    }
 799
 800    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 801
 802 #if defined(_WIN32) || defined(VG_DEVWINDOW)
 803    vg.fps_limit = vg.display_refresh_rate;
 804 #else
 805    vg.fps_limit = 0;
 806 #endif
 807 }
 808
 809 VG_STATIC void _vg_terminate(void)
 810 {
 811    /* Shutdown */
 812    _vg_console_write_persistent();
 813
 814    SDL_AtomicLock( &vg.sl_status );
 815    vg.engine_status = k_engine_status_none;
 816    SDL_AtomicUnlock( &vg.sl_status );
 817
 818    _vg_loader_free();
 819
 820    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 821
 822    SDL_GL_DeleteContext( vg.gl_context );
 823    SDL_Quit();
 824    exit(0);
 825 }
 826
 827 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name )
 828 {
 829    vg_rand_seed( 461 );
 830    _vg_process_launch_opts_internal( argc, argv );
 831
 832    /* Systems init */
 833    vg_alloc_quota();
 834    _vg_console_init();
 835
 836    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 837    _vg_init_window( window_name );
 838
 839    vg_async_init();
 840    SDL_SetRelativeMouseMode(1);
 841
 842    vg.thread_id_main = SDL_GetThreadID(NULL);
 843
 844    /* Opengl-required systems */
 845    _vg_ui_init();
 846    _vg_loader_init();
 847
 848    vg.engine_status = k_engine_status_load_internal;
 849
 850    _vg_opengl_sync_init();
 851     vg_loader_start( _vg_load_full, NULL );
 852    _vg_gameloop();
 853    _vg_terminate();
 854 }
 855
 856 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 857 {
 858    va_list args;
 859    va_start( args, fmt );
 860    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 861    va_end( args );
 862
 863    vg_print_backtrace();
 864
 865    SDL_AtomicLock( &vg.sl_status );
 866    vg.engine_status = k_engine_status_crashed;
 867    SDL_AtomicUnlock( &vg.sl_status );
 868
 869    if( vg_thread_purpose() == k_thread_purpose_loader ){
 870       longjmp( vg.env_loader_exit, 1 );
 871    }
 872    else{
 873       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 874       _vg_terminate();
 875    }
 876 }
 877
 878 #else /* VG_GAME */
 879
 880 #include "vg_log.h"
 881 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 882 {
 883    va_list args;
 884    va_start( args, fmt );
 885    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 886    va_end( args );
 887    exit(0);
 888 }
 889
 890 #endif /* VG_GAME */
 891
 892 /*
 893  * Graphic cards will check these to force it to use the GPU
 894  */
 895 u32 NvOptimusEnablement = 0x00000001;
 896 int AmdPowerXpressRequestHighPerformance = 1;
 897
 898 #include "vg_log.c"
 899
 900 #endif /* VG_HEADER_H */