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_pre_update(void)
  30 |   | |        |
  31 |   | |  .-----+.
  32 |   | | |        |   called 0x to 8x
  33 |   | | |        v
  34 |IMP| |  '- vg_fixed_update(void)
  35 |   | |          |
  36 |   | |       .-'
  37 |   | |      |
  38 |   | |      v
  39 |IMP| |   vg_post_update(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_pre_update(void);
  93 VG_STATIC void vg_fixed_update(void);
  94 VG_STATIC void vg_post_update(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_pre_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_fixed_update();
 405       vg_lines.allow_input = 0;
 406       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 407
 408       vg.fixed_iterations ++;
 409       if( vg.fixed_iterations == 8 ){
 410          break;
 411       }
 412    }
 413    vg_lines.allow_input = 1;
 414    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 415
 416    vg.engine_stage = k_engine_stage_update;
 417    vg_post_update();
 418    vg_profile_end( &vg_prof_update );
 419 }
 420
 421 VG_STATIC void _vg_gameloop_render(void)
 422 {
 423    vg_profile_begin( &vg_prof_render );
 424
 425    /* render */
 426    vg.engine_stage = k_engine_stage_rendering;
 427    vg_render();
 428
 429    /* ui */
 430    vg.engine_stage = k_engine_stage_ui;
 431    {
 432       ui_prerender();
 433       if( vg_console.enabled ){
 434          vg_ui.ignore_input_frames = 10;
 435          vg_gui();
 436          vg_ui.ignore_input_frames = 0;
 437          vg_ui.wants_mouse = 1;
 438          _vg_console_draw();
 439       }
 440       else vg_gui();
 441
 442       /* vg tools */
 443       audio_debug_ui( vg.pv );
 444
 445                 /* profiling */
 446       int frame_target = vg.display_refresh_rate;
 447       if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 448       vg_profile_drawn(
 449             (struct vg_profile *[]){
 450                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 451             (1.0f/(float)frame_target)*1000.0f,
 452             (ui_rect){ 4, 4, 250, 0 }, 0
 453       );
 454       if( vg_profiler ){
 455          char perf[256];
 456
 457          snprintf( perf, 255,
 458                "x: %d y: %d\n"
 459                "refresh: %d (%.1fms)\n"
 460                "samples: %d\n"
 461                "iterations: %d (acc: %.3fms%%)\n"
 462                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 463                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 464                vg.window_x, vg.window_y,
 465                frame_target, (1.0f/(float)frame_target)*1000.0f,
 466                vg.samples,
 467                vg.fixed_iterations,
 468                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 469                vg.time, vg.time_delta, vg.time_rate,
 470                vg.time_fixed_extrapolate, vg.time_frame_delta,
 471                vg.time_spinning );
 472
 473          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 474       }
 475       ui_postrender();
 476    }
 477
 478    vg_profile_end( &vg_prof_render );
 479 }
 480
 481 VG_STATIC int vg_framefilter( double dt )
 482 {
 483    if( (vg.fps_limit <= 0) && (vg.vsync_feature != k_vsync_feature_error) ){
 484       /* turn on vsync if not enabled */
 485
 486       enum vsync_feature requested = k_vsync_feature_enabled;
 487       if( vg.fps_limit < 0 ) requested = k_vsync_feature_enabled_adaptive;
 488
 489       if( vg.vsync_feature != requested ){
 490          vg_info( "Setting swap interval\n" );
 491
 492          int swap_interval = 1;
 493          if( requested == k_vsync_feature_enabled_adaptive ) swap_interval = -1;
 494
 495          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 496             if( requested == k_vsync_feature_enabled ){
 497                vg_error( "Vsync is not supported by your system\n" );
 498                vg_warn( "You may be overriding it in your"
 499                         " graphics control panel.\n" );
 500             }
 501             else{
 502                vg_error( "Adaptive Vsync is not supported by your system\n" );
 503             }
 504
 505             vg.vsync_feature = k_vsync_feature_error;
 506             vg.fps_limit = vg.display_refresh_rate;
 507
 508             /* TODO: Make popup to notify user that this happened */
 509             return 1;
 510          }
 511          else{
 512             vg_success( "Vsync enabled (%d)\n", requested );
 513             vg.vsync_feature = requested;
 514          }
 515       }
 516
 517       return 0;
 518    }
 519
 520    if( vg.vsync_feature != k_vsync_feature_disabled ){
 521       SDL_GL_SetSwapInterval( 0 );
 522       vg.vsync_feature = k_vsync_feature_disabled;
 523    }
 524
 525    if( vg.fps_limit < 25 ) vg.fps_limit = 25;
 526    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 527
 528    double min_frametime = 1.0/(double)vg.fps_limit;
 529    if( vg.time_frame_delta < min_frametime ){
 530       /* TODO: we can use high res nanosleep on Linux here */
 531       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 532       u32 ms = (u32)floor( sleep_ms );
 533
 534       if( ms ){
 535          SDL_Delay( ms );
 536       }
 537       else{
 538          vg.time_spinning ++;
 539       }
 540
 541       return 1;
 542    }
 543
 544    return 0;
 545 }
 546
 547 VG_STATIC int _vg_crashscreen(void)
 548 {
 549 #if 0
 550    if( vg_getkey( SDLK_ESCAPE ) )
 551       return 1;
 552 #endif
 553
 554    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 555    glEnable(GL_BLEND);
 556    glDisable(GL_DEPTH_TEST);
 557    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 558    glBlendEquation(GL_FUNC_ADD);
 559
 560    glClearColor( 0.15f + sinf(vg.time)*0.1f, 0.0f, 0.0f,1.0f );
 561    glClear( GL_COLOR_BUFFER_BIT );
 562    glViewport( 0,0, vg.window_x, vg.window_y );
 563
 564    _vg_render_log();
 565
 566    return 0;
 567 }
 568
 569 VG_STATIC void _vg_gameloop(void){
 570    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 571
 572    vg.time_hp = SDL_GetPerformanceCounter();
 573    vg.time_hp_last = vg.time_hp;
 574
 575    int post_start = 0;
 576    while(1){
 577
 578       vg.time_hp = SDL_GetPerformanceCounter();
 579       u64 udt = vg.time_hp - vg.time_hp_last;
 580       vg.time_hp_last = vg.time_hp;
 581
 582       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 583
 584       vg.time_frame_delta += dt;
 585
 586       if( vg_framefilter( dt ) )
 587          continue;
 588
 589       vg_profile_begin( &vg_prof_swap );
 590       SDL_GL_SwapWindow( vg.window );
 591       vg_profile_end( &vg_prof_swap );
 592
 593       enum engine_status status = _vg_engine_status();
 594
 595       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 596       vg.time += vg.time_delta;
 597
 598       vg_run_async_checked();
 599       _vg_process_events();
 600
 601       if( vg.window_should_close )
 602          break;
 603
 604       if( status == k_engine_status_crashed ){
 605          if( _vg_crashscreen() )
 606             break;
 607       }
 608       else{
 609          if( status == k_engine_status_running ){
 610             _vg_gameloop_update();
 611             _vg_gameloop_render();
 612          }
 613          else{
 614             _vg_loader_render();
 615          }
 616       }
 617
 618       if( vg.loader_ring > 0.01f ){
 619          _vg_loader_render_ring( vg.loader_ring );
 620          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 621       }
 622
 623       vg.time_frame_delta = 0.0;
 624       vg.time_spinning = 0;
 625    }
 626 }
 627
 628 VG_STATIC void _vg_process_launch_opts_internal( int argc, char *argv[] )
 629 {
 630    char *arg;
 631    while( vg_argp( argc, argv ) ){
 632       if( (arg = vg_opt_arg( 'w' )) ){
 633          vg.window_x = atoi( arg );
 634       }
 635
 636       if( (arg = vg_opt_arg( 'h' )) ){
 637          vg.window_y = atoi( arg );
 638       }
 639
 640       if( (arg = vg_long_opt_arg( "samples" )) ){
 641          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 642       }
 643
 644       if(  vg_long_opt( "use-libc-malloc" ) ){
 645          vg_mem.use_libc_malloc = 1;
 646       }
 647
 648       if( vg_long_opt( "high-performance" ) ){
 649          vg.quality_profile = k_quality_profile_low;
 650       }
 651
 652       vg_launch_opt();
 653    }
 654 }
 655
 656 VG_STATIC void _vg_init_window( const char *window_name )
 657 {
 658    vg_info( "SDL_INIT\n" );
 659
 660    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 661       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 662       exit(0);
 663    }
 664
 665    SDL_InitSubSystem( SDL_INIT_AUDIO );
 666    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 667
 668    char *exe_basepath = SDL_GetBasePath();
 669    u32 len = vg_align8( strlen(exe_basepath)+1 );
 670    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 671    strcpy( dest, exe_basepath );
 672    SDL_free( exe_basepath );
 673    vg.base_path = dest;
 674
 675    vg_info( "Basepath: %s\n", vg.base_path );
 676
 677    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 678    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 679    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 680    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 681                            SDL_GL_CONTEXT_PROFILE_CORE );
 682
 683    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 684                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 685
 686    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 687    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 688    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 689    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 690    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 691
 692    /*
 693     * Get monitor information
 694     */
 695    vg_info( "Getting display count\n" );
 696    int display_count = 0,
 697        display_index = 0,
 698        mode_index = 0;
 699
 700    SDL_DisplayMode video_mode;
 701    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 702       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 703       SDL_Quit();
 704       exit(0);
 705    }
 706
 707    vg.display_refresh_rate = video_mode.refresh_rate;
 708    vg.window_x = video_mode.w;
 709    vg.window_y = video_mode.h;
 710
 711 #ifdef VG_DEVWINDOW
 712    vg.window_x = 1200;
 713    vg.window_y = 880;
 714 #endif
 715
 716 #ifndef _WIN32
 717         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 718         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 719         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 720 #endif
 721
 722    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 723                                              vg.display_refresh_rate );
 724
 725    /* TODO: Allow selecting closest video mode from launch opts */
 726    if((vg.window = SDL_CreateWindow( window_name,
 727
 728 #ifdef VG_DEVWINDOW
 729          0, 0, vg.window_x, vg.window_y,
 730          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL|SDL_WINDOW_INPUT_GRABBED
 731       ))){
 732       SDL_SetWindowPosition( vg.window, video_mode.w-vg.window_x, 0 );
 733    }
 734 #else
 735                                      0, 0,
 736                                      vg.window_x, vg.window_y,
 737
 738                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 739                                      SDL_WINDOW_OPENGL |
 740                                      SDL_WINDOW_INPUT_GRABBED
 741                                      )))
 742    {
 743       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 744          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 745          SDL_Quit();
 746          exit(0);
 747       }
 748    }
 749 #endif
 750    else{
 751       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 752       exit(0);
 753    }
 754
 755    SDL_RaiseWindow( vg.window );
 756
 757    vg_info( "CreateContext\n" );
 758
 759    /* ????? */
 760    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 761
 762    /*
 763     * OpenGL loading
 764     */
 765    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 766       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 767       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 768    }
 769    else{
 770       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 771       SDL_Quit();
 772       exit(0);
 773    }
 774
 775    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 776       vg_error( "Glad Failed to initialize\n" );
 777       SDL_GL_DeleteContext( vg.gl_context );
 778       SDL_Quit();
 779       exit(0);
 780    }
 781
 782    const unsigned char* glver = glGetString( GL_VERSION );
 783    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 784
 785    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 786
 787    SDL_DisplayMode dispmode;
 788    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 789       if( dispmode.refresh_rate ){
 790          vg.display_refresh_rate = dispmode.refresh_rate;
 791       }
 792    }
 793
 794    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 795       vg.display_refresh_rate = 60;
 796    }
 797
 798    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 799
 800 #if defined(_WIN32) || defined(VG_DEVWINDOW)
 801    vg.fps_limit = vg.display_refresh_rate;
 802 #else
 803    vg.fps_limit = 0;
 804 #endif
 805 }
 806
 807 VG_STATIC void _vg_terminate(void)
 808 {
 809    /* Shutdown */
 810    _vg_console_write_persistent();
 811
 812    SDL_AtomicLock( &vg.sl_status );
 813    vg.engine_status = k_engine_status_none;
 814    SDL_AtomicUnlock( &vg.sl_status );
 815
 816    _vg_loader_free();
 817
 818    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 819
 820    SDL_GL_DeleteContext( vg.gl_context );
 821    SDL_Quit();
 822    exit(0);
 823 }
 824
 825 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name )
 826 {
 827    vg_rand_seed( 461 );
 828    _vg_process_launch_opts_internal( argc, argv );
 829
 830    /* Systems init */
 831    vg_alloc_quota();
 832    _vg_console_init();
 833
 834    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 835    _vg_init_window( window_name );
 836
 837    vg_async_init();
 838    SDL_SetRelativeMouseMode(1);
 839
 840    vg.thread_id_main = SDL_GetThreadID(NULL);
 841
 842    /* Opengl-required systems */
 843    _vg_ui_init();
 844    _vg_loader_init();
 845
 846    vg.engine_status = k_engine_status_load_internal;
 847
 848    _vg_opengl_sync_init();
 849     vg_loader_start( _vg_load_full, NULL );
 850    _vg_gameloop();
 851    _vg_terminate();
 852 }
 853
 854 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 855 {
 856    va_list args;
 857    va_start( args, fmt );
 858    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 859    va_end( args );
 860
 861    vg_print_backtrace();
 862
 863    SDL_AtomicLock( &vg.sl_status );
 864    vg.engine_status = k_engine_status_crashed;
 865    SDL_AtomicUnlock( &vg.sl_status );
 866
 867    if( vg_thread_purpose() == k_thread_purpose_loader ){
 868       longjmp( vg.env_loader_exit, 1 );
 869    }
 870    else{
 871       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 872       _vg_terminate();
 873    }
 874 }
 875
 876 #else /* VG_GAME */
 877
 878 #include "vg_log.h"
 879 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 880 {
 881    va_list args;
 882    va_start( args, fmt );
 883    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 884    va_end( args );
 885    exit(0);
 886 }
 887
 888 #endif /* VG_GAME */
 889
 890 /*
 891  * Graphic cards will check these to force it to use the GPU
 892  */
 893 u32 NvOptimusEnablement = 0x00000001;
 894 int AmdPowerXpressRequestHighPerformance = 1;
 895
 896 #include "vg_log.c"
 897
 898 #endif /* VG_HEADER_H */