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   #ifndef _WIN32
  61     #include <execinfo.h>
  62   #endif
  63
  64 VG_STATIC void vg_print_backtrace(void)
  65 {
  66 #ifndef _WIN32
  67
  68    void *array[20];
  69    char **strings;
  70    int size, i;
  71
  72    size = backtrace( array, 20 );
  73    strings = backtrace_symbols( array, size );
  74
  75    if( strings != NULL ){
  76       vg_error( "---------------- gnu backtrace -------------\n" );
  77
  78       for( int i=0; i<size; i++ )
  79          vg_info( "%s\n", strings[i] );
  80
  81       vg_error( "---------------- gnu backtrace -------------\n" );
  82    }
  83
  84    free( strings );
  85
  86 #endif
  87 }
  88
  89   #ifdef VG_GAME
  90     #include "dep/glad/glad.h"
  91     #include "dep/sdl/include/SDL.h"
  92     #include "vg_stdint.h"
  93
  94     void vg_register_exit( void( *funcptr )(void), const char *name );
  95
  96     #include "vg_m.h"
  97     #include "vg_io.h"
  98     #include "vg_log.h"
  99     #include "vg_steam.h"
 100
 101   //#define VG_SYNC_DEBUG
 102   #ifdef VG_SYNC_DEBUG
 103     #define VG_SYNC_LOG(STR,...) \
 104        vg_info(STR,SDL_GetThreadID(NULL),##__VA_ARGS__)
 105   #else
 106     #define VG_SYNC_LOG(...)
 107   #endif
 108
 109 /* API */
 110 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name );
 111
 112 /* Thread 1 */
 113 VG_STATIC void vg_preload(void);
 114 VG_STATIC void vg_load(void);
 115
 116 /* Main thread */
 117 VG_STATIC void vg_launch_opt(void);
 118 VG_STATIC void vg_start(void);
 119
 120 VG_STATIC void vg_framebuffer_resize(int w, int h);
 121 VG_STATIC void vg_update(void);
 122 VG_STATIC void vg_update_fixed(void);
 123 VG_STATIC void vg_update_post(void);
 124
 125 VG_STATIC void vg_render(void);
 126 VG_STATIC void vg_gui(void);
 127
 128 struct vg{
 129    /* Engine sync */
 130    SDL_Window     *window;
 131    SDL_GLContext  gl_context;
 132    const char     *base_path;
 133
 134    SDL_sem *sem_loader;        /* allows only one loader at a time */
 135    jmp_buf env_loader_exit;
 136
 137    SDL_threadID  thread_id_main,
 138                  thread_id_loader;
 139    void         *thread_data;
 140
 141    SDL_SpinLock sl_status;
 142    enum engine_status{
 143       k_engine_status_none,
 144       k_engine_status_load_internal,
 145       k_engine_status_running,
 146       k_engine_status_crashed
 147    }
 148    engine_status;
 149
 150    /* Window information */
 151    int window_x,
 152        window_y,
 153        samples,
 154        window_should_close;
 155
 156    int display_refresh_rate,
 157        fps_limit;             /* 0: use vsync, >0: cap fps to this, no vsync */
 158
 159    enum vsync_feature{
 160       k_vsync_feature_disabled=0,
 161       k_vsync_feature_enabled=1,
 162       k_vsync_feature_enabled_adaptive=2,
 163       k_vsync_feature_error=3
 164    }
 165    vsync_feature;
 166
 167    double mouse_pos[2];
 168    v2f mouse_delta,
 169        mouse_wheel;
 170
 171    /* Runtime */
 172    double time,
 173           time_delta,
 174           time_rate,
 175
 176           time_fixed_accumulator,
 177           time_fixed_extrapolate,
 178           time_frame_delta;
 179
 180    u64 time_hp, time_hp_last, time_spinning;
 181
 182    int fixed_iterations;
 183
 184    enum engine_stage{
 185       k_engine_stage_none,
 186       k_engine_stage_update,
 187       k_engine_stage_update_fixed,
 188       k_engine_stage_rendering,
 189       k_engine_stage_ui
 190    }
 191    engine_stage;
 192
 193    /* graphics */
 194    m4x4f pv;
 195    enum quality_profile{
 196       k_quality_profile_high = 0,
 197       k_quality_profile_low = 1,
 198    }
 199    quality_profile;
 200
 201    float loader_ring;
 202 }
 203 VG_STATIC vg = { .time_rate = 1.0 };
 204 const char *vg_get_basepath(void){
 205    return vg.base_path;
 206 }
 207
 208 enum vg_thread_purpose
 209 {
 210    k_thread_purpose_nothing,
 211    k_thread_purpose_main,
 212    k_thread_purpose_loader
 213 };
 214
 215 #include "vg_async.h"
 216
 217 VG_STATIC enum engine_status _vg_engine_status(void)
 218 {
 219    SDL_AtomicLock( &vg.sl_status );
 220    enum engine_status status = vg.engine_status;
 221    SDL_AtomicUnlock( &vg.sl_status );
 222
 223    return status;
 224 }
 225
 226 VG_STATIC enum vg_thread_purpose vg_thread_purpose(void)
 227 {
 228    SDL_AtomicLock( &vg.sl_status );
 229
 230    if( vg.thread_id_main == SDL_GetThreadID(NULL) ){
 231       SDL_AtomicUnlock( &vg.sl_status );
 232       return k_thread_purpose_main;
 233    }
 234    else{
 235       SDL_AtomicUnlock( &vg.sl_status );
 236       return k_thread_purpose_loader;
 237    }
 238 }
 239
 240 VG_STATIC void _vg_opengl_sync_init(void)
 241 {
 242    vg.sem_loader = SDL_CreateSemaphore(1);
 243 }
 244
 245 VG_STATIC void vg_checkgl( const char *src_info );
 246 #define VG_STRINGIT( X ) #X
 247 #define VG_CHECK_GL_ERR() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
 248
 249 #include "vg_console.h"
 250 #include "vg_profiler.h"
 251 #include "vg_audio.h"
 252 #include "vg_shader.h"
 253 #include "vg_tex.h"
 254 #include "vg_input.h"
 255 #include "vg_imgui.h"
 256 #include "vg_lines.h"
 257 #include "vg_loader.h"
 258 #include "vg_opt.h"
 259
 260 /* Diagnostic */
 261 VG_STATIC struct vg_profile vg_prof_update = {.name="update()"},
 262                             vg_prof_render = {.name="render()"},
 263                             vg_prof_swap   = {.name="swap"};
 264
 265 VG_STATIC void vg_checkgl( const char *src_info )
 266 {
 267    int fail = 0;
 268
 269    GLenum err;
 270    while( (err = glGetError()) != GL_NO_ERROR ){
 271       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
 272       fail = 1;
 273    }
 274
 275    if( fail )
 276       vg_fatal_error( "OpenGL Error" );
 277 }
 278
 279 VG_STATIC void async_vg_bake_shaders( void *payload, u32 size )
 280 {
 281    vg_shaders_compile();
 282 }
 283
 284 VG_STATIC void vg_bake_shaders(void)
 285 {
 286    vg_console_reg_cmd( "reload_shaders", vg_shaders_live_recompile, NULL );
 287    vg_async_call( async_vg_bake_shaders, NULL, 0 );
 288 }
 289
 290 void async_internal_complete( void *payload, u32 size )
 291 {
 292    vg_success( "Internal async setup complete\n" );
 293    SDL_AtomicLock( &vg.sl_status );
 294
 295    if( vg.engine_status == k_engine_status_crashed ){
 296       SDL_AtomicUnlock( &vg.sl_status );
 297       return;
 298    }
 299    else{
 300       vg.engine_status = k_engine_status_running;
 301    }
 302
 303    SDL_AtomicUnlock( &vg.sl_status );
 304 }
 305
 306 VG_STATIC void _vg_load_full( void *data )
 307 {
 308    vg_preload();
 309
 310    /* internal */
 311    vg_loader_step( vg_input_init, vg_input_free );
 312    vg_loader_step( vg_lines_init, NULL );
 313    vg_loader_step( vg_audio_init, vg_audio_free );
 314    vg_loader_step( vg_profiler_init, NULL );
 315
 316    vg_async_call( async_internal_complete, NULL, 0 );
 317
 318    /* client */
 319    vg_load();
 320 }
 321
 322 VG_STATIC void _vg_process_events(void)
 323 {
 324    v2_zero( vg.mouse_wheel );
 325    v2_zero( vg.mouse_delta );
 326
 327    /* Update input */
 328    vg_process_inputs();
 329
 330    /* SDL event loop */
 331    SDL_Event event;
 332    while( SDL_PollEvent( &event ) ){
 333       if( event.type == SDL_KEYDOWN ){
 334          if( vg_console.enabled ){
 335             if( event.key.keysym.sym == SDLK_ESCAPE ||
 336                 event.key.keysym.sym == SDLK_BACKQUOTE ){
 337                vg_console.enabled = 0;
 338                ui_defocus_all();
 339             }
 340             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 341                       event.key.keysym.sym == SDLK_n ){
 342                _console_suggest_next();
 343             }
 344             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 345                       event.key.keysym.sym == SDLK_p ){
 346                _console_suggest_prev();
 347             }
 348             else{
 349                _ui_proc_key( event.key.keysym );
 350             }
 351          }
 352          else{
 353             if( event.key.keysym.sym == SDLK_BACKQUOTE ){
 354                vg_console.enabled = 1;
 355             }
 356             else {
 357                _ui_proc_key( event.key.keysym );
 358             }
 359          }
 360       }
 361       else if( event.type == SDL_MOUSEWHEEL ){
 362          vg.mouse_wheel[0] += event.wheel.preciseX;
 363          vg.mouse_wheel[1] += event.wheel.preciseY;
 364       }
 365       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 366                event.type == SDL_CONTROLLERDEVICEREMOVED )
 367       {
 368          vg_input_device_event( &event );
 369       }
 370       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 371                event.type == SDL_CONTROLLERBUTTONDOWN ||
 372                event.type == SDL_CONTROLLERBUTTONUP )
 373       {
 374          vg_input_controller_event( &event );
 375       }
 376       else if( event.type == SDL_MOUSEMOTION ){
 377          vg.mouse_delta[0] += event.motion.xrel;
 378          vg.mouse_delta[1] += event.motion.yrel;
 379       }
 380       else if( event.type == SDL_WINDOWEVENT ){
 381          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 382             int w, h;
 383             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 384
 385             if( !w || !h ){
 386                vg_warn( "Got a invalid framebuffer size: "
 387                         "%dx%d... ignoring\n", w, h );
 388             }
 389             else{
 390                vg.window_x = w;
 391                vg.window_y = h;
 392
 393                vg_framebuffer_resize(w,h);
 394             }
 395          }
 396          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 397             vg.window_should_close = 1;
 398          }
 399       }
 400       else if( event.type == SDL_TEXTINPUT ){
 401          ui_proc_utf8( event.text.text );
 402       }
 403    }
 404
 405    vg.mouse_pos[0] += vg.mouse_delta[0];
 406    vg.mouse_pos[1] += vg.mouse_delta[1];
 407 }
 408
 409 VG_STATIC void _vg_gameloop_update(void)
 410 {
 411    vg_profile_begin( &vg_prof_update );
 412
 413    vg.engine_stage = k_engine_stage_update;
 414    vg_update();
 415
 416    /* Fixed update loop */
 417    vg.engine_stage = k_engine_stage_update_fixed;
 418
 419    vg.fixed_iterations = 0;
 420    vg_lines.allow_input = 1;
 421    vg.time_fixed_accumulator += vg.time_delta;
 422
 423    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 424       vg_update_fixed();
 425       vg_lines.allow_input = 0;
 426
 427       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 428       //vg.accumulator  = VG_MAX( 0.0, vg.accumulator );
 429
 430       vg.fixed_iterations ++;
 431       if( vg.fixed_iterations == 8 ){
 432          break;
 433       }
 434    }
 435    vg_lines.allow_input = 1;
 436    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 437
 438    vg.engine_stage = k_engine_stage_update;
 439    vg_update_post();
 440    vg_profile_end( &vg_prof_update );
 441 }
 442
 443 VG_STATIC void _vg_gameloop_render(void)
 444 {
 445    vg_profile_begin( &vg_prof_render );
 446
 447    /* render */
 448    vg.engine_stage = k_engine_stage_rendering;
 449    vg_render();
 450
 451    /* ui */
 452    vg.engine_stage = k_engine_stage_ui;
 453    {
 454       ui_prerender();
 455       if( vg_console.enabled ){
 456          vg_ui.ignore_input_frames = 10;
 457          vg_gui();
 458          vg_ui.ignore_input_frames = 0;
 459          vg_ui.wants_mouse = 1;
 460          _vg_console_draw();
 461       }
 462       else vg_gui();
 463
 464       /* vg tools */
 465       audio_debug_ui( vg.pv );
 466
 467                 /* profiling */
 468       int frame_target = vg.display_refresh_rate;
 469       if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 470       vg_profile_drawn(
 471             (struct vg_profile *[]){
 472                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 473             (1.0f/(float)frame_target)*1000.0f,
 474             (ui_rect){ 4, 4, 250, 0 }, 0
 475       );
 476       if( vg_profiler ){
 477          char perf[256];
 478
 479          snprintf( perf, 255,
 480                "x: %d y: %d\n"
 481                "refresh: %d (%.1fms)\n"
 482                "samples: %d\n"
 483                "iterations: %d (acc: %.3fms%%)\n"
 484                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 485                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 486                vg.window_x, vg.window_y,
 487                frame_target, (1.0f/(float)frame_target)*1000.0f,
 488                vg.samples,
 489                vg.fixed_iterations,
 490                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 491                vg.time, vg.time_delta, vg.time_rate,
 492                vg.time_fixed_extrapolate, vg.time_frame_delta,
 493                vg.time_spinning );
 494
 495          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 496       }
 497       ui_postrender();
 498    }
 499
 500    vg_profile_end( &vg_prof_render );
 501 }
 502
 503 VG_STATIC int vg_framefilter( double dt )
 504 {
 505    if( (vg.fps_limit <= 0) && (vg.vsync_feature != k_vsync_feature_error) ){
 506       /* turn on vsync if not enabled */
 507
 508       enum vsync_feature requested = k_vsync_feature_enabled;
 509       if( vg.fps_limit < 0 ) requested = k_vsync_feature_enabled_adaptive;
 510
 511       if( vg.vsync_feature != requested ){
 512          vg_info( "Setting swap interval\n" );
 513
 514          int swap_interval = 1;
 515          if( requested == k_vsync_feature_enabled_adaptive ) swap_interval = -1;
 516
 517          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 518             if( requested == k_vsync_feature_enabled ){
 519                vg_error( "Vsync is not supported by your system\n" );
 520                vg_warn( "You may be overriding it in your"
 521                         " graphics control panel.\n" );
 522             }
 523             else{
 524                vg_error( "Adaptive Vsync is not supported by your system\n" );
 525             }
 526
 527             vg.vsync_feature = k_vsync_feature_error;
 528             vg.fps_limit = vg.display_refresh_rate;
 529
 530             /* TODO: Make popup to notify user that this happened */
 531             return 1;
 532          }
 533          else{
 534             vg_success( "Vsync enabled (%d)\n", requested );
 535             vg.vsync_feature = requested;
 536          }
 537       }
 538
 539       return 0;
 540    }
 541
 542    if( vg.vsync_feature != k_vsync_feature_disabled ){
 543       SDL_GL_SetSwapInterval( 0 );
 544       vg.vsync_feature = k_vsync_feature_disabled;
 545    }
 546
 547    if( vg.fps_limit < 25 ) vg.fps_limit = 25;
 548    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 549
 550    double min_frametime = 1.0/(double)vg.fps_limit;
 551    if( vg.time_frame_delta < min_frametime ){
 552       /* TODO: we can use high res nanosleep on Linux here */
 553       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 554       u32 ms = (u32)floor( sleep_ms );
 555
 556       if( ms ){
 557          SDL_Delay( ms );
 558       }
 559       else{
 560          vg.time_spinning ++;
 561       }
 562
 563       return 1;
 564    }
 565
 566    return 0;
 567 }
 568
 569 VG_STATIC int _vg_crashscreen(void)
 570 {
 571 #if 0
 572    if( vg_getkey( SDLK_ESCAPE ) )
 573       return 1;
 574 #endif
 575
 576    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 577    glEnable(GL_BLEND);
 578    glDisable(GL_DEPTH_TEST);
 579    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 580    glBlendEquation(GL_FUNC_ADD);
 581
 582    glClearColor( 0.15f + sinf(vg.time)*0.1f, 0.0f, 0.0f,1.0f );
 583    glClear( GL_COLOR_BUFFER_BIT );
 584    glViewport( 0,0, vg.window_x, vg.window_y );
 585
 586    _vg_render_log();
 587
 588    return 0;
 589 }
 590
 591 VG_STATIC void _vg_gameloop(void)
 592 {
 593    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 594
 595    vg.time_hp = SDL_GetPerformanceCounter();
 596    vg.time_hp_last = vg.time_hp;
 597
 598    int post_start = 0;
 599    while(1){
 600
 601       vg.time_hp = SDL_GetPerformanceCounter();
 602       u64 udt = vg.time_hp - vg.time_hp_last;
 603       vg.time_hp_last = vg.time_hp;
 604
 605       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 606
 607       vg.time_frame_delta += dt;
 608
 609       if( vg_framefilter( dt ) )
 610          continue;
 611
 612       vg_profile_begin( &vg_prof_swap );
 613       SDL_GL_SwapWindow( vg.window );
 614       vg_profile_end( &vg_prof_swap );
 615
 616       enum engine_status status = _vg_engine_status();
 617
 618       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 619       vg.time += vg.time_delta;
 620
 621       vg_run_async_checked();
 622       _vg_process_events();
 623
 624       if( vg.window_should_close )
 625          break;
 626
 627       if( status == k_engine_status_crashed ){
 628          if( _vg_crashscreen() )
 629             break;
 630       }
 631       else{
 632          if( status == k_engine_status_running ){
 633             _vg_gameloop_update();
 634             _vg_gameloop_render();
 635          }
 636          else{
 637             _vg_loader_render();
 638          }
 639       }
 640
 641       if( vg.loader_ring > 0.01f ){
 642          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 643          _vg_loader_render_ring( vg.loader_ring );
 644       }
 645
 646       vg.time_frame_delta = 0.0;
 647       vg.time_spinning = 0;
 648    }
 649 }
 650
 651 VG_STATIC void _vg_process_launch_opts_internal( int argc, char *argv[] )
 652 {
 653    char *arg;
 654    while( vg_argp( argc, argv ) ){
 655       if( (arg = vg_opt_arg( 'w' )) ){
 656          vg.window_x = atoi( arg );
 657       }
 658
 659       if( (arg = vg_opt_arg( 'h' )) ){
 660          vg.window_y = atoi( arg );
 661       }
 662
 663       if( (arg = vg_long_opt_arg( "samples" )) ){
 664          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 665       }
 666
 667       if(  vg_long_opt( "use-libc-malloc" ) ){
 668          vg_mem.use_libc_malloc = 1;
 669       }
 670
 671       if( vg_long_opt( "high-performance" ) ){
 672          vg.quality_profile = k_quality_profile_low;
 673       }
 674
 675       vg_launch_opt();
 676    }
 677 }
 678
 679 VG_STATIC void _vg_init_window( const char *window_name )
 680 {
 681    vg_info( "SDL_INIT\n" );
 682
 683    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 684       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 685       exit(0);
 686    }
 687
 688    SDL_InitSubSystem( SDL_INIT_AUDIO );
 689    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 690
 691    char *exe_basepath = SDL_GetBasePath();
 692    u32 len = vg_align8( strlen(exe_basepath)+1 );
 693    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 694    strcpy( dest, exe_basepath );
 695    SDL_free( exe_basepath );
 696    vg.base_path = dest;
 697
 698    vg_info( "Basepath: %s\n", vg.base_path );
 699
 700    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 701    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 702    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 703    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 704                            SDL_GL_CONTEXT_PROFILE_CORE );
 705
 706    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 707                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 708
 709    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 710    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 711    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 712    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 713    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 714
 715    /*
 716     * Get monitor information
 717     */
 718    vg_info( "Getting display count\n" );
 719    int display_count = 0,
 720        display_index = 0,
 721        mode_index = 0;
 722
 723 #ifdef VG_DEVWINDOW
 724    vg.window_x = 1600;
 725    vg.window_y = 1000;
 726 #else
 727
 728    SDL_DisplayMode video_mode;
 729    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 730       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 731       SDL_Quit();
 732       exit(0);
 733    }
 734
 735    vg.display_refresh_rate = video_mode.refresh_rate;
 736    vg.window_x = video_mode.w;
 737    vg.window_y = video_mode.h;
 738 #endif
 739
 740 #ifndef _WIN32
 741         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 742         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 743         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 744 #endif
 745
 746    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 747                                              vg.display_refresh_rate );
 748
 749    /* TODO: Allow selecting closest video mode from launch opts */
 750    if((vg.window = SDL_CreateWindow( window_name,
 751
 752 #ifdef VG_DEVWINDOW
 753          0, 0, vg.window_x, vg.window_y,
 754          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL|SDL_WINDOW_INPUT_GRABBED
 755       ))){}
 756 #else
 757                                      0, 0,
 758                                      vg.window_x, vg.window_y,
 759
 760                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 761                                      SDL_WINDOW_OPENGL |
 762                                      SDL_WINDOW_INPUT_GRABBED
 763                                      )))
 764    {
 765       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 766          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 767          SDL_Quit();
 768          exit(0);
 769       }
 770    }
 771 #endif
 772    else{
 773       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 774       exit(0);
 775    }
 776
 777    SDL_RaiseWindow( vg.window );
 778
 779    vg_info( "CreateContext\n" );
 780
 781    /* ????? */
 782    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 783
 784    /*
 785     * OpenGL loading
 786     */
 787    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 788       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 789       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 790    }
 791    else{
 792       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 793       SDL_Quit();
 794       exit(0);
 795    }
 796
 797    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 798       vg_error( "Glad Failed to initialize\n" );
 799       SDL_GL_DeleteContext( vg.gl_context );
 800       SDL_Quit();
 801       exit(0);
 802    }
 803
 804    const unsigned char* glver = glGetString( GL_VERSION );
 805    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 806
 807    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 808
 809    SDL_DisplayMode dispmode;
 810    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 811       if( dispmode.refresh_rate ){
 812          vg.display_refresh_rate = dispmode.refresh_rate;
 813       }
 814    }
 815
 816    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 817       vg.display_refresh_rate = 60;
 818    }
 819
 820    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 821
 822 #if defined(_WIN32) || defined(VG_DEVWINDOW)
 823    vg.fps_limit = vg.display_refresh_rate;
 824 #else
 825    vg.fps_limit = 0;
 826 #endif
 827 }
 828
 829 VG_STATIC void _vg_terminate(void)
 830 {
 831    /* Shutdown */
 832    _vg_console_write_persistent();
 833
 834    SDL_AtomicLock( &vg.sl_status );
 835    vg.engine_status = k_engine_status_none;
 836    SDL_AtomicUnlock( &vg.sl_status );
 837
 838    _vg_loader_free();
 839
 840    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 841
 842    SDL_GL_DeleteContext( vg.gl_context );
 843    SDL_Quit();
 844    exit(0);
 845 }
 846
 847 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name )
 848 {
 849    vg_rand_seed( 461 );
 850    _vg_process_launch_opts_internal( argc, argv );
 851
 852    /* Systems init */
 853    vg_alloc_quota();
 854    _vg_console_init();
 855
 856    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 857    _vg_init_window( window_name );
 858
 859    vg_async_init();
 860    SDL_SetRelativeMouseMode(1);
 861
 862    vg.thread_id_main = SDL_GetThreadID(NULL);
 863
 864    /* Opengl-required systems */
 865    _vg_ui_init();
 866    _vg_loader_init();
 867
 868    vg.engine_status = k_engine_status_load_internal;
 869
 870    _vg_opengl_sync_init();
 871     vg_loader_start( _vg_load_full, NULL );
 872    _vg_gameloop();
 873    _vg_terminate();
 874 }
 875
 876 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 877 {
 878    va_list args;
 879    va_start( args, fmt );
 880    _vg_log_write( stderr, KRED "  fatal" KWHT "| " KRED, fmt, args );
 881    va_end( args );
 882
 883    vg_print_backtrace();
 884
 885    SDL_AtomicLock( &vg.sl_status );
 886    vg.engine_status = k_engine_status_crashed;
 887    SDL_AtomicUnlock( &vg.sl_status );
 888
 889    if( vg_thread_purpose() == k_thread_purpose_loader ){
 890       longjmp( vg.env_loader_exit, 1 );
 891    }
 892    else{
 893       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 894       _vg_terminate();
 895    }
 896 }
 897
 898 #else /* VG_GAME */
 899
 900 #include "vg_log.h"
 901 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 902 {
 903    va_list args;
 904    va_start( args, fmt );
 905    _vg_log_write( stderr, KRED "  fatal" KWHT "| " KRED, fmt, args );
 906    va_end( args );
 907    exit(0);
 908 }
 909
 910 #endif /* VG_GAME */
 911
 912 /*
 913  * Graphic cards will check these to force it to use the GPU
 914  */
 915 u32 NvOptimusEnablement = 0x00000001;
 916 int AmdPowerXpressRequestHighPerformance = 1;
 917
 918 #endif /* VG_HEADER_H */