vg.h

   1 /* Copyright (C) 2021-2024 Mt.Zero Software - 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_gui(void)
  46 |   | |      |
  47 |   | |      v
  48 |IMP| |   vg_game_settings_init(void)
  49 |IMP| |   vg_game_settings_gui( ui_rect panel )
  50 |   | |      |     (optional: #define VG_GAME_SETTINGS)
  51 |   | |      |
  52 |   |  '----'
  53 '___'
  54
  55 */
  56
  57 #ifndef VG_HEADER_H
  58   #define VG_HEADER_H
  59
  60   const char *vg_get_basepath(void);
  61
  62   #include "vg_platform.h"
  63   #include "vg_mem.h"
  64
  65   #ifdef VG_GAME
  66     #include "dep/glad/glad.h"
  67     #include "dep/sdl/include/SDL.h"
  68     #include "vg_stdint.h"
  69
  70     void vg_register_exit( void( *funcptr )(void), const char *name );
  71
  72     #include "vg_m.h"
  73     #include "vg_io.h"
  74     #include "vg_log.h"
  75 #ifndef VG_NO_STEAM
  76     #include "vg_steam.h"
  77 #endif
  78
  79   //#define VG_SYNC_DEBUG
  80   #ifdef VG_SYNC_DEBUG
  81     #define VG_SYNC_LOG(STR,...) \
  82        vg_info(STR,SDL_GetThreadID(NULL),##__VA_ARGS__)
  83   #else
  84     #define VG_SYNC_LOG(...)
  85   #endif
  86
  87 /* API */
  88 static void vg_enter( int argc, char *argv[], const char *window_name );
  89
  90 /* Thread 1 */
  91 static void vg_preload(void);
  92 static void vg_load(void);
  93
  94 /* Main thread */
  95 static void vg_launch_opt(void);
  96 static void vg_start(void);
  97
  98 static void vg_framebuffer_resize(int w, int h);
  99 static void vg_pre_update(void);
 100 static void vg_fixed_update(void);
 101 static void vg_post_update(void);
 102
 103 static void vg_render(void);
 104 static void vg_gui(void);
 105
 106 enum quality_profile{
 107    k_quality_profile_high = 0,
 108    k_quality_profile_low = 1,
 109    k_quality_profile_min = 2
 110 };
 111
 112 struct vg{
 113    /* Engine sync */
 114    SDL_Window     *window;
 115    SDL_GLContext  gl_context;
 116    const char     *base_path;
 117
 118    SDL_sem *sem_loader;        /* allows only one loader at a time */
 119    jmp_buf env_loader_exit;
 120
 121    SDL_threadID  thread_id_main,
 122                  thread_id_loader;
 123    void         *thread_data;
 124
 125    SDL_SpinLock sl_status;
 126    enum engine_status{
 127       k_engine_status_none,
 128       k_engine_status_load_internal,
 129       k_engine_status_running,
 130       k_engine_status_crashed
 131    }
 132    engine_status;
 133
 134    /* Window information */
 135    int window_x,
 136        window_y,
 137        samples,
 138        window_should_close;
 139
 140    int display_refresh_rate,
 141        fps_limit,
 142        vsync,
 143        screen_mode,
 144        display_index;
 145
 146    int settings_open;
 147
 148    enum vsync_feature{
 149       k_vsync_feature_disabled=0,
 150       k_vsync_feature_enabled=1,
 151       k_vsync_feature_enabled_adaptive=2,
 152       k_vsync_feature_error=3
 153    }
 154    vsync_feature;
 155
 156    i32 mouse_pos[2];
 157    v2f mouse_delta,
 158        mouse_wheel;
 159
 160    /* Runtime */
 161    double time,
 162           time_real,
 163           time_delta,
 164           time_rate,
 165
 166           time_fixed_accumulator,
 167           time_fixed_extrapolate,
 168           time_frame_delta;
 169
 170    u64 time_hp, time_hp_last, time_spinning;
 171
 172    int fixed_iterations;
 173
 174    enum engine_stage{
 175       k_engine_stage_none,
 176       k_engine_stage_update,
 177       k_engine_stage_update_fixed,
 178       k_engine_stage_rendering,
 179       k_engine_stage_ui
 180    }
 181    engine_stage;
 182
 183    /* graphics */
 184 #ifdef VG_3D
 185    m4x4f pv;
 186 #else
 187    m3x3f pv;
 188 #endif
 189
 190    i32 quality_profile;
 191
 192    float loader_ring;
 193    GLuint tex_missing;
 194
 195    vg_rand rand;
 196 }
 197 static vg = { .time_rate = 1.0 };
 198 const char *vg_get_basepath(void){
 199    return vg.base_path;
 200 }
 201
 202 enum vg_thread_purpose
 203 {
 204    k_thread_purpose_nothing,
 205    k_thread_purpose_main,
 206    k_thread_purpose_loader
 207 };
 208
 209 #include "vg_async.h"
 210
 211 static enum engine_status _vg_engine_status(void)
 212 {
 213    SDL_AtomicLock( &vg.sl_status );
 214    enum engine_status status = vg.engine_status;
 215    SDL_AtomicUnlock( &vg.sl_status );
 216
 217    return status;
 218 }
 219
 220 static enum vg_thread_purpose vg_thread_purpose(void)
 221 {
 222    SDL_AtomicLock( &vg.sl_status );
 223
 224    if( vg.thread_id_main == SDL_GetThreadID(NULL) ){
 225       SDL_AtomicUnlock( &vg.sl_status );
 226       return k_thread_purpose_main;
 227    }
 228    else{
 229       SDL_AtomicUnlock( &vg.sl_status );
 230       return k_thread_purpose_loader;
 231    }
 232 }
 233
 234 static void vg_assert_thread( enum vg_thread_purpose required ){
 235    enum vg_thread_purpose purpose = vg_thread_purpose();
 236
 237    if( purpose != required ){
 238       vg_fatal_error( "thread_purpose must be %u not %u\n", required, purpose );
 239    }
 240 }
 241
 242 static void _vg_opengl_sync_init(void)
 243 {
 244    vg.sem_loader = SDL_CreateSemaphore(1);
 245 }
 246
 247 static void vg_checkgl( const char *src_info );
 248 #define VG_STRINGIT( X ) #X
 249 #define VG_CHECK_GL_ERR() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
 250
 251 #include "vg_console.h"
 252 #include "vg_profiler.h"
 253 #ifndef VG_NO_AUDIO
 254   #include "vg_audio.h"
 255 #endif
 256 #include "vg_shader.h"
 257 #include "vg_tex.h"
 258 #include "vg_input.h"
 259 #include "vg_imgui.h"
 260 #include "vg_lines.h"
 261 #include "vg_loader.h"
 262 #include "vg_opt.h"
 263 #include "vg_settings_menu.h"
 264
 265 /* Diagnostic */
 266 static struct vg_profile vg_prof_update = {.name="update()"},
 267                             vg_prof_render = {.name="render()"},
 268                             vg_prof_swap   = {.name="swap"};
 269
 270 static void vg_checkgl( const char *src_info )
 271 {
 272    int fail = 0;
 273
 274    GLenum err;
 275    while( (err = glGetError()) != GL_NO_ERROR ){
 276       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
 277       fail = 1;
 278    }
 279
 280    if( fail )
 281       vg_fatal_error( "OpenGL Error" );
 282 }
 283
 284 static void async_vg_bake_shaders( void *payload, u32 size )
 285 {
 286    vg_shaders_compile();
 287 }
 288
 289 static void vg_bake_shaders(void)
 290 {
 291    vg_console_reg_cmd( "reload_shaders", vg_shaders_live_recompile, NULL );
 292    vg_async_call( async_vg_bake_shaders, NULL, 0 );
 293 }
 294
 295 void async_internal_complete( void *payload, u32 size )
 296 {
 297    vg_success( "Internal async setup complete\n" );
 298    SDL_AtomicLock( &vg.sl_status );
 299
 300    if( vg.engine_status == k_engine_status_crashed ){
 301       SDL_AtomicUnlock( &vg.sl_status );
 302       return;
 303    }
 304    else{
 305       vg.engine_status = k_engine_status_running;
 306    }
 307
 308    SDL_AtomicUnlock( &vg.sl_status );
 309 }
 310
 311 static void _vg_load_full( void *data ){
 312    vg_preload();
 313    vg_tex2d_replace_with_error( &vg.tex_missing );
 314    vg_ui.tex_bg = vg.tex_missing;
 315
 316    /* internal */
 317    vg_loader_step( vg_input_init, vg_input_free );
 318    vg_loader_step( vg_lines_init, NULL );
 319 #ifndef VG_NO_AUDIO
 320    vg_loader_step( vg_audio_init, vg_audio_free );
 321 #endif
 322    vg_loader_step( vg_profiler_init, NULL );
 323
 324    vg_async_call( async_internal_complete, NULL, 0 );
 325
 326    /* client */
 327    vg_load();
 328
 329    vg_success( "Client loaded in %fs\n", vg.time_real );
 330 }
 331
 332 static void _vg_process_events(void)
 333 {
 334    v2_zero( vg.mouse_wheel );
 335    v2_zero( vg.mouse_delta );
 336
 337    /* Update input */
 338    vg_process_inputs();
 339
 340    /* SDL event loop */
 341    SDL_Event event;
 342    while( SDL_PollEvent( &event ) ){
 343       if( event.type == SDL_KEYDOWN ){
 344          if( vg_console.enabled &&
 345                (vg_ui.focused_control_type != k_ui_control_modal) ){
 346             if( event.key.keysym.sym == SDLK_ESCAPE ||
 347                 event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 348                vg_console.enabled = 0;
 349                ui_defocus_all();
 350             }
 351             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 352                       event.key.keysym.sym == SDLK_n ){
 353                _console_suggest_next();
 354             }
 355             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 356                       event.key.keysym.sym == SDLK_p ){
 357                _console_suggest_prev();
 358             }
 359             else{
 360                _ui_proc_key( event.key.keysym );
 361             }
 362          }
 363          else{
 364             if( event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 365                vg_console.enabled = 1;
 366             }
 367             else {
 368                _ui_proc_key( event.key.keysym );
 369             }
 370          }
 371       }
 372       else if( event.type == SDL_MOUSEWHEEL ){
 373          vg.mouse_wheel[0] += event.wheel.preciseX;
 374          vg.mouse_wheel[1] += event.wheel.preciseY;
 375       }
 376       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 377                event.type == SDL_CONTROLLERDEVICEREMOVED )
 378       {
 379          vg_input_device_event( &event );
 380       }
 381       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 382                event.type == SDL_CONTROLLERBUTTONDOWN ||
 383                event.type == SDL_CONTROLLERBUTTONUP )
 384       {
 385          vg_input_controller_event( &event );
 386       }
 387       else if( event.type == SDL_MOUSEMOTION ){
 388          vg.mouse_delta[0] += event.motion.xrel;
 389          vg.mouse_delta[1] += event.motion.yrel;
 390       }
 391       else if( event.type == SDL_WINDOWEVENT ){
 392          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 393             int w, h;
 394             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 395
 396             if( !w || !h ){
 397                vg_warn( "Got a invalid framebuffer size: "
 398                         "%dx%d... ignoring\n", w, h );
 399             }
 400             else{
 401                vg.window_x = w;
 402                vg.window_y = h;
 403
 404                vg_framebuffer_resize(w,h);
 405             }
 406          }
 407          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 408             vg.window_should_close = 1;
 409          }
 410       }
 411       else if( event.type == SDL_TEXTINPUT ){
 412          ui_proc_utf8( event.text.text );
 413       }
 414    }
 415
 416    SDL_GetMouseState( &vg.mouse_pos[0], &vg.mouse_pos[1] );
 417 }
 418
 419 static void _vg_gameloop_update(void)
 420 {
 421    vg_profile_begin( &vg_prof_update );
 422
 423    vg.engine_stage = k_engine_stage_update;
 424    vg_pre_update();
 425
 426    /* Fixed update loop */
 427    vg.engine_stage = k_engine_stage_update_fixed;
 428
 429    vg.fixed_iterations = 0;
 430    vg_lines.allow_input = 1;
 431    vg.time_fixed_accumulator += vg.time_delta;
 432
 433    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 434       vg_fixed_update();
 435       vg_lines.allow_input = 0;
 436       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 437
 438       vg.fixed_iterations ++;
 439       if( vg.fixed_iterations == 8 ){
 440          break;
 441       }
 442    }
 443    vg_lines.allow_input = 1;
 444    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 445
 446    vg.engine_stage = k_engine_stage_update;
 447    vg_post_update();
 448    vg_profile_end( &vg_prof_update );
 449 }
 450
 451 static void _vg_gameloop_render(void)
 452 {
 453    vg_profile_begin( &vg_prof_render );
 454
 455    /* render */
 456    vg.engine_stage = k_engine_stage_rendering;
 457    vg_render();
 458
 459    /* ui */
 460    vg.engine_stage = k_engine_stage_ui;
 461    {
 462       ui_prerender();
 463       if( vg_console.enabled ){
 464          vg_ui.ignore_input_frames = 10;
 465          vg_gui();
 466          vg_ui.ignore_input_frames = 0;
 467          vg_ui.wants_mouse = 1;
 468          _vg_console_draw();
 469       }
 470       else vg_gui();
 471
 472       if( vg.settings_open )
 473          vg_settings_gui();
 474
 475       /* vg tools */
 476 #ifndef VG_NO_AUDIO
 477       audio_debug_ui( vg.pv );
 478 #endif
 479
 480                 /* profiling */
 481       if( vg_profiler ){
 482          int frame_target = vg.display_refresh_rate;
 483          if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 484          vg_profile_drawn(
 485                (struct vg_profile *[]){
 486                   &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 487                (1.0f/(float)frame_target)*1000.0f,
 488                (ui_rect){ 4, 4, 250, 0 }, 0, 0
 489          );
 490          char perf[256];
 491
 492          snprintf( perf, 255,
 493                "x: %d y: %d\n"
 494                "refresh: %d (%.1fms)\n"
 495                "samples: %d\n"
 496                "iterations: %d (acc: %.3fms%%)\n"
 497                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 498                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 499                vg.window_x, vg.window_y,
 500                frame_target, (1.0f/(float)frame_target)*1000.0f,
 501                vg.samples,
 502                vg.fixed_iterations,
 503                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 504                vg.time_real, vg.time_delta, vg.time_rate,
 505                vg.time_fixed_extrapolate, vg.time_frame_delta,
 506                vg.time_spinning );
 507
 508          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 509       }
 510       ui_postrender();
 511    }
 512
 513    vg_profile_end( &vg_prof_render );
 514 }
 515
 516 static void aaaaaaaaaaaaaaaaa( ui_rect r ){
 517    int frame_target = vg.display_refresh_rate;
 518    if( !vg.vsync ) frame_target = vg.fps_limit;
 519
 520    vg_profile_drawn(
 521          (struct vg_profile *[]){
 522             &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 523          (1.0f/(f32)frame_target)*1500.0f,
 524          r, 0, 1
 525    );
 526
 527    ui_fill( (ui_rect){ r[0], r[1] + (r[3]*2)/3, r[2], 1 }, ui_colour(k_ui_fg) );
 528 }
 529
 530 static void vg_changevsync(void){
 531    if( vg.vsync && (vg.vsync_feature != k_vsync_feature_error) ){
 532       /* turn on vsync if not enabled */
 533
 534       enum vsync_feature requested = k_vsync_feature_enabled;
 535       if( vg.vsync < 0 ) requested = k_vsync_feature_enabled_adaptive;
 536
 537       if( vg.vsync_feature != requested ){
 538          vg_info( "Setting swap interval\n" );
 539
 540          int swap_interval = 1;
 541          if( requested == k_vsync_feature_enabled_adaptive )
 542             swap_interval = -1;
 543
 544          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 545             if( requested == k_vsync_feature_enabled ){
 546                vg_error( "Vsync is not supported by your system\n" );
 547                vg_warn( "You may be overriding it in your"
 548                         " graphics control panel.\n" );
 549             }
 550             else{
 551                vg_error( "Adaptive Vsync is not supported by your system\n" );
 552             }
 553
 554             vg.vsync_feature = k_vsync_feature_error;
 555             vg.vsync = 0;
 556             /* TODO: Make popup to notify user that this happened */
 557          }
 558          else{
 559             vg_success( "Vsync enabled (%d)\n", requested );
 560             vg.vsync_feature = requested;
 561          }
 562       }
 563    }
 564    else {
 565       if( vg.vsync_feature != k_vsync_feature_disabled ){
 566          SDL_GL_SetSwapInterval( 0 );
 567          vg.vsync_feature = k_vsync_feature_disabled;
 568       }
 569    }
 570 }
 571
 572 static int vg_framefilter( double dt ){
 573    if( vg.fps_limit < 24 ) vg.fps_limit = 24;
 574    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 575
 576    double min_frametime = 1.0/(double)vg.fps_limit;
 577    if( vg.time_frame_delta < min_frametime ){
 578       /* TODO: we can use high res nanosleep on Linux here */
 579       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 580       u32 ms = (u32)floor( sleep_ms );
 581
 582       if( ms ){
 583          if( !vg_loader_availible() )
 584             SDL_Delay(1);
 585          else
 586             SDL_Delay(ms);
 587       }
 588       else{
 589          vg.time_spinning ++;
 590       }
 591
 592       return 1;
 593    }
 594
 595    return 0;
 596 }
 597
 598 static int _vg_crashscreen(void)
 599 {
 600 #if 0
 601    if( vg_getkey( SDLK_ESCAPE ) )
 602       return 1;
 603 #endif
 604
 605    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 606    glEnable(GL_BLEND);
 607    glDisable(GL_DEPTH_TEST);
 608    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 609    glBlendEquation(GL_FUNC_ADD);
 610
 611    glClearColor( 0.15f + sinf(vg.time_real)*0.1f, 0.0f, 0.0f,1.0f );
 612    glClear( GL_COLOR_BUFFER_BIT );
 613    glViewport( 0,0, vg.window_x, vg.window_y );
 614
 615    _vg_render_log();
 616
 617    return 0;
 618 }
 619
 620 static void _vg_gameloop(void){
 621    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 622
 623    vg.time_hp = SDL_GetPerformanceCounter();
 624    vg.time_hp_last = vg.time_hp;
 625
 626    int post_start = 0;
 627    while(1){
 628       vg.time_hp = SDL_GetPerformanceCounter();
 629       u64 udt = vg.time_hp - vg.time_hp_last;
 630       vg.time_hp_last = vg.time_hp;
 631
 632       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 633
 634       vg.time_frame_delta += dt;
 635       vg_run_async_checked();
 636
 637       if( vg_framefilter( dt ) )
 638          continue;
 639
 640       vg_changevsync();
 641
 642       enum engine_status status = _vg_engine_status();
 643       if( status == k_engine_status_running )
 644          vg_profile_begin( &vg_prof_swap );
 645
 646       SDL_GL_SwapWindow( vg.window );
 647
 648       if( status == k_engine_status_running )
 649          vg_profile_end( &vg_prof_swap );
 650
 651       vg.time_real += vg.time_frame_delta;
 652       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 653       vg.time += vg.time_delta;
 654
 655       _vg_process_events();
 656
 657       if( vg.window_should_close )
 658          break;
 659
 660       if( status == k_engine_status_crashed ){
 661          if( _vg_crashscreen() )
 662             break;
 663       }
 664       else{
 665          if( status == k_engine_status_running ){
 666             _vg_gameloop_update();
 667             _vg_gameloop_render();
 668          }
 669          else{
 670             _vg_loader_render();
 671          }
 672       }
 673
 674       if( vg.loader_ring > 0.01f ){
 675          _vg_loader_render_ring( vg.loader_ring );
 676          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 677       }
 678
 679       vg.time_frame_delta = 0.0;
 680       vg.time_spinning = 0;
 681    }
 682 }
 683
 684 static void _vg_process_launch_opts_internal( int argc, char *argv[] )
 685 {
 686    char *arg;
 687    while( vg_argp( argc, argv ) ){
 688       if( (arg = vg_opt_arg( 'w' )) ){
 689          vg.window_x = atoi( arg );
 690       }
 691
 692       if( (arg = vg_opt_arg( 'h' )) ){
 693          vg.window_y = atoi( arg );
 694       }
 695
 696       if( (arg = vg_long_opt_arg( "samples" )) ){
 697          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 698       }
 699
 700       if(  vg_long_opt( "use-libc-malloc" ) ){
 701          vg_mem.use_libc_malloc = 1;
 702       }
 703
 704       if( vg_long_opt( "high-performance" ) ){
 705          vg.quality_profile = k_quality_profile_low;
 706       }
 707
 708       vg_launch_opt();
 709    }
 710 }
 711
 712 static void _vg_init_window( const char *window_name )
 713 {
 714    vg_info( "SDL_INIT\n" );
 715
 716    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 717       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 718       exit(0);
 719    }
 720
 721 #ifndef VG_NO_AUDIO
 722    SDL_InitSubSystem( SDL_INIT_AUDIO );
 723 #endif
 724    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 725
 726    char *exe_basepath = SDL_GetBasePath();
 727    u32 len = vg_align8( strlen(exe_basepath)+1 );
 728    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 729    strcpy( dest, exe_basepath );
 730    SDL_free( exe_basepath );
 731    vg.base_path = dest;
 732
 733    vg_info( "Basepath: %s\n", vg.base_path );
 734
 735    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 736    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 737    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 738    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 739                            SDL_GL_CONTEXT_PROFILE_CORE );
 740
 741    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 742                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 743
 744    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 745    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 746    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 747    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 748    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 749
 750    /*
 751     * Get monitor information
 752     */
 753    vg_info( "Getting display count\n" );
 754    int display_count = 0,
 755        display_index = 0,
 756        mode_index = 0;
 757
 758    SDL_DisplayMode video_mode;
 759    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 760       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 761       SDL_Quit();
 762       exit(0);
 763    }
 764
 765    vg.display_refresh_rate = video_mode.refresh_rate;
 766    vg.window_x = video_mode.w;
 767    vg.window_y = video_mode.h;
 768
 769    if( vg.screen_mode == 2 ){
 770       vg.window_x = 1280;
 771       vg.window_y = 720;
 772    }
 773
 774 #ifndef _WIN32
 775         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 776         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 777         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 778 #endif
 779
 780    u32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_INPUT_GRABBED |
 781                SDL_WINDOW_RESIZABLE;
 782
 783    if( vg.screen_mode == 1 )
 784       flags |= SDL_WINDOW_FULLSCREEN;
 785    else if( vg.screen_mode == 0 )
 786       flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
 787
 788    vg_info( "CreateWindow( %d %d %u )\n", vg.window_x, vg.window_y, flags );
 789
 790    if((vg.window = SDL_CreateWindow( window_name, 0, 0,
 791                                      vg.window_x, vg.window_y, flags ))){
 792       if( vg.screen_mode == 2 )
 793          SDL_SetWindowPosition( vg.window, video_mode.w-vg.window_x, 0 );
 794    }
 795    else{
 796       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 797       exit(0);
 798    }
 799
 800    SDL_RaiseWindow( vg.window );
 801    SDL_SetWindowMinimumSize( vg.window, 1280, 720 );
 802    SDL_SetWindowMaximumSize( vg.window, 4096, 4096 );
 803
 804    vg_info( "CreateContext\n" );
 805
 806    /* ????? */
 807    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 808
 809    /*
 810     * OpenGL loading
 811     */
 812    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 813       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 814       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 815    }
 816    else{
 817       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 818       SDL_Quit();
 819       exit(0);
 820    }
 821
 822    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 823       vg_error( "Glad Failed to initialize\n" );
 824       SDL_GL_DeleteContext( vg.gl_context );
 825       SDL_Quit();
 826       exit(0);
 827    }
 828
 829    const unsigned char* glver = glGetString( GL_VERSION );
 830    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 831
 832    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 833
 834    SDL_DisplayMode dispmode;
 835    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 836       if( dispmode.refresh_rate ){
 837          vg.display_refresh_rate = dispmode.refresh_rate;
 838       }
 839    }
 840
 841    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 842       vg.display_refresh_rate = 60;
 843    }
 844
 845    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 846    if( !vg.fps_limit) vg.fps_limit = vg.display_refresh_rate;
 847 }
 848
 849 static void _vg_terminate(void)
 850 {
 851    /* Shutdown */
 852    _vg_console_write_persistent();
 853
 854    SDL_AtomicLock( &vg.sl_status );
 855    vg.engine_status = k_engine_status_none;
 856    SDL_AtomicUnlock( &vg.sl_status );
 857
 858    _vg_loader_free();
 859
 860    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 861
 862    SDL_GL_DeleteContext( vg.gl_context );
 863    SDL_Quit();
 864    exit(0);
 865 }
 866
 867 static void vg_enter( int argc, char *argv[], const char *window_name ){
 868    vg_rand_seed( &vg.rand, 461 );
 869    _vg_process_launch_opts_internal( argc, argv );
 870
 871    /* Systems init */
 872    vg_alloc_quota();
 873    _vg_console_init();
 874
 875    vg_console_reg_var( "vg_fps_limit", &vg.fps_limit,
 876                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 877    vg_console_reg_var( "vg_vsync", &vg.vsync,
 878                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 879    vg_console_reg_var( "vg_quality", &vg.quality_profile,
 880                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 881    vg_console_reg_var( "vg_screen_mode", &vg.screen_mode,
 882                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 883    vg_audio_register();
 884    vg_console_load_autos();
 885
 886    vg_console_reg_cmd( "vg_settings", cmd_vg_settings_toggle, NULL );
 887    _vg_init_window( window_name );
 888
 889    vg_async_init();
 890    SDL_SetRelativeMouseMode(1);
 891
 892    vg.thread_id_main = SDL_GetThreadID(NULL);
 893
 894    /* Opengl-required systems */
 895    _vg_ui_init();
 896    _vg_loader_init();
 897
 898    vg.engine_status = k_engine_status_load_internal;
 899
 900    _vg_opengl_sync_init();
 901     vg_loader_start( _vg_load_full, NULL );
 902    _vg_gameloop();
 903    _vg_terminate();
 904 }
 905
 906 static void vg_fatal_error( const char *fmt, ... )
 907 {
 908    va_list args;
 909    va_start( args, fmt );
 910    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 911    va_end( args );
 912
 913    vg_print_backtrace();
 914
 915    SDL_AtomicLock( &vg.sl_status );
 916    vg.engine_status = k_engine_status_crashed;
 917    SDL_AtomicUnlock( &vg.sl_status );
 918
 919    if( vg_thread_purpose() == k_thread_purpose_loader ){
 920       longjmp( vg.env_loader_exit, 1 );
 921    }
 922    else{
 923       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 924       _vg_terminate();
 925    }
 926 }
 927
 928 #else /* VG_GAME */
 929
 930 #include "vg_log.h"
 931 static void vg_fatal_error( const char *fmt, ... )
 932 {
 933    va_list args;
 934    va_start( args, fmt );
 935    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 936    va_end( args );
 937    exit(1);
 938 }
 939
 940 #endif /* VG_GAME */
 941
 942 /*
 943  * Graphic cards will check these to force it to use the GPU
 944  */
 945 u32 NvOptimusEnablement = 0x00000001;
 946 int AmdPowerXpressRequestHighPerformance = 1;
 947
 948 #include "vg_log.c"
 949
 950 #endif /* VG_HEADER_H */