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_rigidbody_view.h"
 262 #include "vg_loader.h"
 263 #include "vg_opt.h"
 264 #include "vg_settings_menu.h"
 265
 266 /* Diagnostic */
 267 static struct vg_profile vg_prof_update = {.name="update()"},
 268                             vg_prof_render = {.name="render()"},
 269                             vg_prof_swap   = {.name="swap"};
 270
 271 static void vg_checkgl( const char *src_info )
 272 {
 273    int fail = 0;
 274
 275    GLenum err;
 276    while( (err = glGetError()) != GL_NO_ERROR ){
 277       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
 278       fail = 1;
 279    }
 280
 281    if( fail )
 282       vg_fatal_error( "OpenGL Error" );
 283 }
 284
 285 static void async_vg_bake_shaders( void *payload, u32 size )
 286 {
 287    vg_shaders_compile();
 288 }
 289
 290 static void vg_bake_shaders(void)
 291 {
 292    vg_console_reg_cmd( "reload_shaders", vg_shaders_live_recompile, NULL );
 293    vg_async_call( async_vg_bake_shaders, NULL, 0 );
 294 }
 295
 296 void async_internal_complete( void *payload, u32 size )
 297 {
 298    vg_success( "Internal async setup complete\n" );
 299    SDL_AtomicLock( &vg.sl_status );
 300
 301    if( vg.engine_status == k_engine_status_crashed ){
 302       SDL_AtomicUnlock( &vg.sl_status );
 303       return;
 304    }
 305    else{
 306       vg.engine_status = k_engine_status_running;
 307    }
 308
 309    SDL_AtomicUnlock( &vg.sl_status );
 310 }
 311
 312 static void _vg_load_full( void *data ){
 313    vg_preload();
 314    vg_tex2d_replace_with_error( &vg.tex_missing );
 315    vg_ui.tex_bg = vg.tex_missing;
 316
 317    /* internal */
 318    vg_loader_step( vg_input_init, vg_input_free );
 319    vg_loader_step( vg_lines_init, NULL );
 320    vg_loader_step( vg_rb_view_init, NULL );
 321 #ifndef VG_NO_AUDIO
 322    vg_loader_step( vg_audio_init, vg_audio_free );
 323 #endif
 324    vg_loader_step( vg_profiler_init, NULL );
 325
 326    vg_async_call( async_internal_complete, NULL, 0 );
 327
 328    /* client */
 329    vg_load();
 330
 331    vg_success( "Client loaded in %fs\n", vg.time_real );
 332 }
 333
 334 static void _vg_process_events(void)
 335 {
 336    v2_zero( vg.mouse_wheel );
 337    v2_zero( vg.mouse_delta );
 338
 339    /* Update input */
 340    vg_process_inputs();
 341
 342    /* SDL event loop */
 343    SDL_Event event;
 344    while( SDL_PollEvent( &event ) ){
 345       if( event.type == SDL_KEYDOWN ){
 346          if( vg_console.enabled &&
 347                (vg_ui.focused_control_type != k_ui_control_modal) ){
 348             if( event.key.keysym.sym == SDLK_ESCAPE ||
 349                 event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 350                vg_console.enabled = 0;
 351                ui_defocus_all();
 352             }
 353             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 354                       event.key.keysym.sym == SDLK_n ){
 355                _console_suggest_next();
 356             }
 357             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 358                       event.key.keysym.sym == SDLK_p ){
 359                _console_suggest_prev();
 360             }
 361             else{
 362                _ui_proc_key( event.key.keysym );
 363             }
 364          }
 365          else{
 366             if( event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 367                vg_console.enabled = 1;
 368             }
 369             else {
 370                _ui_proc_key( event.key.keysym );
 371             }
 372          }
 373       }
 374       else if( event.type == SDL_MOUSEWHEEL ){
 375          vg.mouse_wheel[0] += event.wheel.preciseX;
 376          vg.mouse_wheel[1] += event.wheel.preciseY;
 377       }
 378       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 379                event.type == SDL_CONTROLLERDEVICEREMOVED )
 380       {
 381          vg_input_device_event( &event );
 382       }
 383       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 384                event.type == SDL_CONTROLLERBUTTONDOWN ||
 385                event.type == SDL_CONTROLLERBUTTONUP )
 386       {
 387          vg_input_controller_event( &event );
 388       }
 389       else if( event.type == SDL_MOUSEMOTION ){
 390          vg.mouse_delta[0] += event.motion.xrel;
 391          vg.mouse_delta[1] += event.motion.yrel;
 392       }
 393       else if( event.type == SDL_WINDOWEVENT ){
 394          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 395             int w, h;
 396             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 397
 398             if( !w || !h ){
 399                vg_warn( "Got a invalid framebuffer size: "
 400                         "%dx%d... ignoring\n", w, h );
 401             }
 402             else{
 403                vg.window_x = w;
 404                vg.window_y = h;
 405
 406                vg_framebuffer_resize(w,h);
 407             }
 408          }
 409          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 410             vg.window_should_close = 1;
 411          }
 412       }
 413       else if( event.type == SDL_TEXTINPUT ){
 414          ui_proc_utf8( event.text.text );
 415       }
 416    }
 417
 418    SDL_GetMouseState( &vg.mouse_pos[0], &vg.mouse_pos[1] );
 419 }
 420
 421 static void _vg_gameloop_update(void)
 422 {
 423    vg_profile_begin( &vg_prof_update );
 424
 425    vg.engine_stage = k_engine_stage_update;
 426    vg_pre_update();
 427
 428    /* Fixed update loop */
 429    vg.engine_stage = k_engine_stage_update_fixed;
 430
 431    vg.fixed_iterations = 0;
 432    vg_lines.enabled = vg_lines.render;
 433    vg.time_fixed_accumulator += vg.time_delta;
 434
 435    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 436       vg_fixed_update();
 437       vg_lines.enabled = 0;
 438       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 439
 440       vg.fixed_iterations ++;
 441       if( vg.fixed_iterations == 8 ){
 442          break;
 443       }
 444    }
 445    vg_lines.enabled = vg_lines.render;
 446    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 447
 448    vg.engine_stage = k_engine_stage_update;
 449    vg_post_update();
 450    vg_profile_end( &vg_prof_update );
 451 }
 452
 453 static void _vg_gameloop_render(void)
 454 {
 455    vg_profile_begin( &vg_prof_render );
 456
 457    /* render */
 458    vg.engine_stage = k_engine_stage_rendering;
 459    vg_render();
 460
 461    /* ui */
 462    vg.engine_stage = k_engine_stage_ui;
 463    {
 464       ui_prerender();
 465       if( vg_console.enabled ){
 466          vg_ui.ignore_input_frames = 10;
 467          vg_gui();
 468          vg_ui.ignore_input_frames = 0;
 469          vg_ui.wants_mouse = 1;
 470          _vg_console_draw();
 471       }
 472       else vg_gui();
 473
 474       if( vg.settings_open )
 475          vg_settings_gui();
 476
 477       /* vg tools */
 478 #ifndef VG_NO_AUDIO
 479       audio_debug_ui( vg.pv );
 480 #endif
 481
 482                 /* profiling */
 483       if( vg_profiler ){
 484          int frame_target = vg.display_refresh_rate;
 485          if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 486          vg_profile_drawn(
 487                (struct vg_profile *[]){
 488                   &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 489                (1.0f/(float)frame_target)*1000.0f,
 490                (ui_rect){ 4, 4, 250, 0 }, 0, 0
 491          );
 492          char perf[256];
 493
 494          snprintf( perf, 255,
 495                "x: %d y: %d\n"
 496                "refresh: %d (%.1fms)\n"
 497                "samples: %d\n"
 498                "iterations: %d (acc: %.3fms%%)\n"
 499                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 500                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 501                vg.window_x, vg.window_y,
 502                frame_target, (1.0f/(float)frame_target)*1000.0f,
 503                vg.samples,
 504                vg.fixed_iterations,
 505                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 506                vg.time_real, vg.time_delta, vg.time_rate,
 507                vg.time_fixed_extrapolate, vg.time_frame_delta,
 508                vg.time_spinning );
 509
 510          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 511       }
 512       ui_postrender();
 513    }
 514
 515    vg_profile_end( &vg_prof_render );
 516 }
 517
 518 static void aaaaaaaaaaaaaaaaa( ui_rect r ){
 519    int frame_target = vg.display_refresh_rate;
 520    if( !vg.vsync ) frame_target = vg.fps_limit;
 521
 522    vg_profile_drawn(
 523          (struct vg_profile *[]){
 524             &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 525          (1.0f/(f32)frame_target)*1500.0f,
 526          r, 0, 1
 527    );
 528
 529    ui_fill( (ui_rect){ r[0], r[1] + (r[3]*2)/3, r[2], 1 }, ui_colour(k_ui_fg) );
 530 }
 531
 532 static void vg_changevsync(void){
 533    if( vg.vsync && (vg.vsync_feature != k_vsync_feature_error) ){
 534       /* turn on vsync if not enabled */
 535
 536       enum vsync_feature requested = k_vsync_feature_enabled;
 537       if( vg.vsync < 0 ) requested = k_vsync_feature_enabled_adaptive;
 538
 539       if( vg.vsync_feature != requested ){
 540          vg_info( "Setting swap interval\n" );
 541
 542          int swap_interval = 1;
 543          if( requested == k_vsync_feature_enabled_adaptive )
 544             swap_interval = -1;
 545
 546          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 547             if( requested == k_vsync_feature_enabled ){
 548                vg_error( "Vsync is not supported by your system\n" );
 549                vg_warn( "You may be overriding it in your"
 550                         " graphics control panel.\n" );
 551             }
 552             else{
 553                vg_error( "Adaptive Vsync is not supported by your system\n" );
 554             }
 555
 556             vg.vsync_feature = k_vsync_feature_error;
 557             vg.vsync = 0;
 558             /* TODO: Make popup to notify user that this happened */
 559          }
 560          else{
 561             vg_success( "Vsync enabled (%d)\n", requested );
 562             vg.vsync_feature = requested;
 563          }
 564       }
 565    }
 566    else {
 567       if( vg.vsync_feature != k_vsync_feature_disabled ){
 568          SDL_GL_SetSwapInterval( 0 );
 569          vg.vsync_feature = k_vsync_feature_disabled;
 570       }
 571    }
 572 }
 573
 574 static int vg_framefilter( double dt ){
 575    if( vg.fps_limit < 24 ) vg.fps_limit = 24;
 576    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 577
 578    double min_frametime = 1.0/(double)vg.fps_limit;
 579    if( vg.time_frame_delta < min_frametime ){
 580       /* TODO: we can use high res nanosleep on Linux here */
 581       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 582       u32 ms = (u32)floor( sleep_ms );
 583
 584       if( ms ){
 585          if( !vg_loader_availible() )
 586             SDL_Delay(1);
 587          else
 588             SDL_Delay(ms);
 589       }
 590       else{
 591          vg.time_spinning ++;
 592       }
 593
 594       return 1;
 595    }
 596
 597    return 0;
 598 }
 599
 600 static int _vg_crashscreen(void)
 601 {
 602 #if 0
 603    if( vg_getkey( SDLK_ESCAPE ) )
 604       return 1;
 605 #endif
 606
 607    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 608    glEnable(GL_BLEND);
 609    glDisable(GL_DEPTH_TEST);
 610    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 611    glBlendEquation(GL_FUNC_ADD);
 612
 613    glClearColor( 0.15f + sinf(vg.time_real)*0.1f, 0.0f, 0.0f,1.0f );
 614    glClear( GL_COLOR_BUFFER_BIT );
 615    glViewport( 0,0, vg.window_x, vg.window_y );
 616
 617    _vg_render_log();
 618
 619    return 0;
 620 }
 621
 622 static void _vg_gameloop(void){
 623    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 624
 625    vg.time_hp = SDL_GetPerformanceCounter();
 626    vg.time_hp_last = vg.time_hp;
 627
 628    int post_start = 0;
 629    while(1){
 630       vg.time_hp = SDL_GetPerformanceCounter();
 631       u64 udt = vg.time_hp - vg.time_hp_last;
 632       vg.time_hp_last = vg.time_hp;
 633
 634       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 635
 636       vg.time_frame_delta += dt;
 637       vg_run_async_checked();
 638
 639       if( vg_framefilter( dt ) )
 640          continue;
 641
 642       vg_changevsync();
 643
 644       enum engine_status status = _vg_engine_status();
 645       if( status == k_engine_status_running )
 646          vg_profile_begin( &vg_prof_swap );
 647
 648       SDL_GL_SwapWindow( vg.window );
 649
 650       if( status == k_engine_status_running )
 651          vg_profile_end( &vg_prof_swap );
 652
 653       vg.time_real += vg.time_frame_delta;
 654       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 655       vg.time += vg.time_delta;
 656
 657       _vg_process_events();
 658
 659       if( vg.window_should_close )
 660          break;
 661
 662       if( status == k_engine_status_crashed ){
 663          if( _vg_crashscreen() )
 664             break;
 665       }
 666       else{
 667          if( status == k_engine_status_running ){
 668             _vg_gameloop_update();
 669             _vg_gameloop_render();
 670          }
 671          else{
 672             _vg_loader_render();
 673          }
 674       }
 675
 676       if( vg.loader_ring > 0.01f ){
 677          _vg_loader_render_ring( vg.loader_ring );
 678          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 679       }
 680
 681       vg.time_frame_delta = 0.0;
 682       vg.time_spinning = 0;
 683    }
 684 }
 685
 686 static void _vg_process_launch_opts_internal( int argc, char *argv[] )
 687 {
 688    char *arg;
 689    while( vg_argp( argc, argv ) ){
 690       if( (arg = vg_opt_arg( 'w' )) ){
 691          vg.window_x = atoi( arg );
 692       }
 693
 694       if( (arg = vg_opt_arg( 'h' )) ){
 695          vg.window_y = atoi( arg );
 696       }
 697
 698       if( (arg = vg_long_opt_arg( "samples" )) ){
 699          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 700       }
 701
 702       if(  vg_long_opt( "use-libc-malloc" ) ){
 703          vg_mem.use_libc_malloc = 1;
 704       }
 705
 706       if( vg_long_opt( "high-performance" ) ){
 707          vg.quality_profile = k_quality_profile_low;
 708       }
 709
 710       vg_launch_opt();
 711    }
 712 }
 713
 714 static void _vg_init_window( const char *window_name )
 715 {
 716    vg_info( "SDL_INIT\n" );
 717
 718    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 719       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 720       exit(0);
 721    }
 722
 723 #ifndef VG_NO_AUDIO
 724    SDL_InitSubSystem( SDL_INIT_AUDIO );
 725 #endif
 726    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 727
 728    char *exe_basepath = SDL_GetBasePath();
 729    u32 len = vg_align8( strlen(exe_basepath)+1 );
 730    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 731    strcpy( dest, exe_basepath );
 732    SDL_free( exe_basepath );
 733    vg.base_path = dest;
 734
 735    vg_info( "Basepath: %s\n", vg.base_path );
 736
 737    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 738    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 739    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 740    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 741                            SDL_GL_CONTEXT_PROFILE_CORE );
 742
 743    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 744                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 745
 746    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 747    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 748    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 749    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 750    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 751
 752    /*
 753     * Get monitor information
 754     */
 755    vg_info( "Getting display count\n" );
 756    int display_count = 0,
 757        display_index = 0,
 758        mode_index = 0;
 759
 760    SDL_DisplayMode video_mode;
 761    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 762       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 763       SDL_Quit();
 764       exit(0);
 765    }
 766
 767    vg.display_refresh_rate = video_mode.refresh_rate;
 768    vg.window_x = video_mode.w;
 769    vg.window_y = video_mode.h;
 770
 771    if( vg.screen_mode == 2 ){
 772       vg.window_x = 1280;
 773       vg.window_y = 720;
 774    }
 775
 776 #ifndef _WIN32
 777         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 778         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 779         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 780 #endif
 781
 782    u32 flags = SDL_WINDOW_OPENGL | SDL_WINDOW_INPUT_GRABBED |
 783                SDL_WINDOW_RESIZABLE;
 784
 785    if( vg.screen_mode == 1 )
 786       flags |= SDL_WINDOW_FULLSCREEN;
 787    else if( vg.screen_mode == 0 )
 788       flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
 789
 790    vg_info( "CreateWindow( %d %d %u )\n", vg.window_x, vg.window_y, flags );
 791
 792    if((vg.window = SDL_CreateWindow( window_name, 0, 0,
 793                                      vg.window_x, vg.window_y, flags ))){
 794       if( vg.screen_mode == 2 )
 795          SDL_SetWindowPosition( vg.window, video_mode.w-vg.window_x, 0 );
 796    }
 797    else{
 798       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 799       exit(0);
 800    }
 801
 802    SDL_RaiseWindow( vg.window );
 803    SDL_SetWindowMinimumSize( vg.window, 1280, 720 );
 804    SDL_SetWindowMaximumSize( vg.window, 4096, 4096 );
 805
 806    vg_info( "CreateContext\n" );
 807
 808    /* ????? */
 809    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 810
 811    /*
 812     * OpenGL loading
 813     */
 814    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 815       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 816       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 817    }
 818    else{
 819       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 820       SDL_Quit();
 821       exit(0);
 822    }
 823
 824    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 825       vg_error( "Glad Failed to initialize\n" );
 826       SDL_GL_DeleteContext( vg.gl_context );
 827       SDL_Quit();
 828       exit(0);
 829    }
 830
 831    const unsigned char* glver = glGetString( GL_VERSION );
 832    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 833
 834    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 835
 836    SDL_DisplayMode dispmode;
 837    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 838       if( dispmode.refresh_rate ){
 839          vg.display_refresh_rate = dispmode.refresh_rate;
 840       }
 841    }
 842
 843    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 844       vg.display_refresh_rate = 60;
 845    }
 846
 847    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 848    if( !vg.fps_limit) vg.fps_limit = vg.display_refresh_rate;
 849 }
 850
 851 static void _vg_terminate(void)
 852 {
 853    /* Shutdown */
 854    _vg_console_write_persistent();
 855
 856    SDL_AtomicLock( &vg.sl_status );
 857    vg.engine_status = k_engine_status_none;
 858    SDL_AtomicUnlock( &vg.sl_status );
 859
 860    _vg_loader_free();
 861
 862    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 863
 864    SDL_GL_DeleteContext( vg.gl_context );
 865    SDL_Quit();
 866    exit(0);
 867 }
 868
 869 static void vg_enter( int argc, char *argv[], const char *window_name ){
 870    vg_rand_seed( &vg.rand, 461 );
 871    _vg_process_launch_opts_internal( argc, argv );
 872
 873    /* Systems init */
 874    vg_alloc_quota();
 875    _vg_console_init();
 876
 877    vg_console_reg_var( "vg_fps_limit", &vg.fps_limit,
 878                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 879    vg_console_reg_var( "vg_vsync", &vg.vsync,
 880                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 881    vg_console_reg_var( "vg_quality", &vg.quality_profile,
 882                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 883    vg_console_reg_var( "vg_screen_mode", &vg.screen_mode,
 884                         k_var_dtype_i32, VG_VAR_PERSISTENT );
 885    vg_audio_register();
 886    vg_console_load_autos();
 887
 888    vg_console_reg_cmd( "vg_settings", cmd_vg_settings_toggle, NULL );
 889    _vg_init_window( window_name );
 890
 891    vg_async_init();
 892    SDL_SetRelativeMouseMode(1);
 893
 894    vg.thread_id_main = SDL_GetThreadID(NULL);
 895
 896    /* Opengl-required systems */
 897    _vg_ui_init();
 898    _vg_loader_init();
 899
 900    vg.engine_status = k_engine_status_load_internal;
 901
 902    _vg_opengl_sync_init();
 903     vg_loader_start( _vg_load_full, NULL );
 904    _vg_gameloop();
 905    _vg_terminate();
 906 }
 907
 908 static void vg_fatal_error( const char *fmt, ... )
 909 {
 910    va_list args;
 911    va_start( args, fmt );
 912    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 913    va_end( args );
 914
 915    vg_print_backtrace();
 916
 917    SDL_AtomicLock( &vg.sl_status );
 918    vg.engine_status = k_engine_status_crashed;
 919    SDL_AtomicUnlock( &vg.sl_status );
 920
 921    if( vg_thread_purpose() == k_thread_purpose_loader ){
 922       longjmp( vg.env_loader_exit, 1 );
 923    }
 924    else{
 925       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 926       _vg_terminate();
 927    }
 928 }
 929
 930 #else /* VG_GAME */
 931
 932 #include "vg_log.h"
 933 static void vg_fatal_error( const char *fmt, ... )
 934 {
 935    va_list args;
 936    va_start( args, fmt );
 937    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 938    va_end( args );
 939    exit(1);
 940 }
 941
 942 #endif /* VG_GAME */
 943
 944 /*
 945  * Graphic cards will check these to force it to use the GPU
 946  */
 947 u32 NvOptimusEnablement = 0x00000001;
 948 int AmdPowerXpressRequestHighPerformance = 1;
 949
 950 #include "vg_log.c"
 951
 952 #endif /* VG_HEADER_H */