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 #ifndef VG_NO_STEAM
  71     #include "vg_steam.h"
  72 #endif
  73
  74   //#define VG_SYNC_DEBUG
  75   #ifdef VG_SYNC_DEBUG
  76     #define VG_SYNC_LOG(STR,...) \
  77        vg_info(STR,SDL_GetThreadID(NULL),##__VA_ARGS__)
  78   #else
  79     #define VG_SYNC_LOG(...)
  80   #endif
  81
  82 /* API */
  83 static void vg_enter( int argc, char *argv[], const char *window_name );
  84
  85 /* Thread 1 */
  86 static void vg_preload(void);
  87 static void vg_load(void);
  88
  89 /* Main thread */
  90 static void vg_launch_opt(void);
  91 static void vg_start(void);
  92
  93 static void vg_framebuffer_resize(int w, int h);
  94 static void vg_pre_update(void);
  95 static void vg_fixed_update(void);
  96 static void vg_post_update(void);
  97
  98 static void vg_render(void);
  99 static void vg_gui(void);
 100
 101 struct vg{
 102    /* Engine sync */
 103    SDL_Window     *window;
 104    SDL_GLContext  gl_context;
 105    const char     *base_path;
 106
 107    SDL_sem *sem_loader;        /* allows only one loader at a time */
 108    jmp_buf env_loader_exit;
 109
 110    SDL_threadID  thread_id_main,
 111                  thread_id_loader;
 112    void         *thread_data;
 113
 114    SDL_SpinLock sl_status;
 115    enum engine_status{
 116       k_engine_status_none,
 117       k_engine_status_load_internal,
 118       k_engine_status_running,
 119       k_engine_status_crashed
 120    }
 121    engine_status;
 122
 123    /* Window information */
 124    int window_x,
 125        window_y,
 126        samples,
 127        window_should_close;
 128
 129    int display_refresh_rate,
 130        fps_limit;             /* 0: use vsync, >0: cap fps to this, no vsync */
 131
 132    enum vsync_feature{
 133       k_vsync_feature_disabled=0,
 134       k_vsync_feature_enabled=1,
 135       k_vsync_feature_enabled_adaptive=2,
 136       k_vsync_feature_error=3
 137    }
 138    vsync_feature;
 139
 140    double mouse_pos[2];
 141    v2f mouse_delta,
 142        mouse_wheel;
 143
 144    /* Runtime */
 145    double time,
 146           time_real,
 147           time_delta,
 148           time_rate,
 149
 150           time_fixed_accumulator,
 151           time_fixed_extrapolate,
 152           time_frame_delta;
 153
 154    u64 time_hp, time_hp_last, time_spinning;
 155
 156    int fixed_iterations;
 157
 158    enum engine_stage{
 159       k_engine_stage_none,
 160       k_engine_stage_update,
 161       k_engine_stage_update_fixed,
 162       k_engine_stage_rendering,
 163       k_engine_stage_ui
 164    }
 165    engine_stage;
 166
 167    /* graphics */
 168    m4x4f pv;
 169    enum quality_profile{
 170       k_quality_profile_high = 0,
 171       k_quality_profile_low = 1,
 172    }
 173    quality_profile;
 174
 175    float loader_ring;
 176    GLuint tex_missing;
 177 }
 178 static vg = { .time_rate = 1.0 };
 179 const char *vg_get_basepath(void){
 180    return vg.base_path;
 181 }
 182
 183 enum vg_thread_purpose
 184 {
 185    k_thread_purpose_nothing,
 186    k_thread_purpose_main,
 187    k_thread_purpose_loader
 188 };
 189
 190 #include "vg_async.h"
 191
 192 static enum engine_status _vg_engine_status(void)
 193 {
 194    SDL_AtomicLock( &vg.sl_status );
 195    enum engine_status status = vg.engine_status;
 196    SDL_AtomicUnlock( &vg.sl_status );
 197
 198    return status;
 199 }
 200
 201 static enum vg_thread_purpose vg_thread_purpose(void)
 202 {
 203    SDL_AtomicLock( &vg.sl_status );
 204
 205    if( vg.thread_id_main == SDL_GetThreadID(NULL) ){
 206       SDL_AtomicUnlock( &vg.sl_status );
 207       return k_thread_purpose_main;
 208    }
 209    else{
 210       SDL_AtomicUnlock( &vg.sl_status );
 211       return k_thread_purpose_loader;
 212    }
 213 }
 214
 215 static void vg_assert_thread( enum vg_thread_purpose required ){
 216    enum vg_thread_purpose purpose = vg_thread_purpose();
 217
 218    if( purpose != required ){
 219       vg_fatal_error( "thread_purpose must be %u not %u\n", required, purpose );
 220    }
 221 }
 222
 223 static void _vg_opengl_sync_init(void)
 224 {
 225    vg.sem_loader = SDL_CreateSemaphore(1);
 226 }
 227
 228 static void vg_checkgl( const char *src_info );
 229 #define VG_STRINGIT( X ) #X
 230 #define VG_CHECK_GL_ERR() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
 231
 232 #include "vg_console.h"
 233 #include "vg_profiler.h"
 234 #ifndef VG_NO_AUDIO
 235   #include "vg_audio.h"
 236 #endif
 237 #include "vg_shader.h"
 238 #include "vg_tex.h"
 239 #include "vg_input.h"
 240 #include "vg_imgui.h"
 241 #include "vg_lines.h"
 242 #include "vg_loader.h"
 243 #include "vg_opt.h"
 244
 245 /* Diagnostic */
 246 static struct vg_profile vg_prof_update = {.name="update()"},
 247                             vg_prof_render = {.name="render()"},
 248                             vg_prof_swap   = {.name="swap"};
 249
 250 static void vg_checkgl( const char *src_info )
 251 {
 252    int fail = 0;
 253
 254    GLenum err;
 255    while( (err = glGetError()) != GL_NO_ERROR ){
 256       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
 257       fail = 1;
 258    }
 259
 260    if( fail )
 261       vg_fatal_error( "OpenGL Error" );
 262 }
 263
 264 static void async_vg_bake_shaders( void *payload, u32 size )
 265 {
 266    vg_shaders_compile();
 267 }
 268
 269 static void vg_bake_shaders(void)
 270 {
 271    vg_console_reg_cmd( "reload_shaders", vg_shaders_live_recompile, NULL );
 272    vg_async_call( async_vg_bake_shaders, NULL, 0 );
 273 }
 274
 275 void async_internal_complete( void *payload, u32 size )
 276 {
 277    vg_success( "Internal async setup complete\n" );
 278    SDL_AtomicLock( &vg.sl_status );
 279
 280    if( vg.engine_status == k_engine_status_crashed ){
 281       SDL_AtomicUnlock( &vg.sl_status );
 282       return;
 283    }
 284    else{
 285       vg.engine_status = k_engine_status_running;
 286    }
 287
 288    SDL_AtomicUnlock( &vg.sl_status );
 289 }
 290
 291 static void _vg_load_full( void *data )
 292 {
 293    vg_preload();
 294
 295    /* internal */
 296    vg_tex2d_replace_with_error( &vg.tex_missing );
 297    vg_loader_step( vg_input_init, vg_input_free );
 298    vg_loader_step( vg_lines_init, NULL );
 299 #ifndef VG_NO_AUDIO
 300    vg_loader_step( vg_audio_init, vg_audio_free );
 301 #endif
 302    vg_loader_step( vg_profiler_init, NULL );
 303
 304    vg_async_call( async_internal_complete, NULL, 0 );
 305
 306    /* client */
 307    vg_load();
 308
 309    vg_success( "Client loaded in %fs\n", vg.time_real );
 310 }
 311
 312 static void _vg_process_events(void)
 313 {
 314    v2_zero( vg.mouse_wheel );
 315    v2_zero( vg.mouse_delta );
 316
 317    /* Update input */
 318    vg_process_inputs();
 319
 320    /* SDL event loop */
 321    SDL_Event event;
 322    while( SDL_PollEvent( &event ) ){
 323       if( event.type == SDL_KEYDOWN ){
 324          if( vg_console.enabled &&
 325                (vg_ui.focused_control_type != k_ui_control_modal) ){
 326             if( event.key.keysym.sym == SDLK_ESCAPE ||
 327                 event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 328                vg_console.enabled = 0;
 329                ui_defocus_all();
 330             }
 331             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 332                       event.key.keysym.sym == SDLK_n ){
 333                _console_suggest_next();
 334             }
 335             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 336                       event.key.keysym.sym == SDLK_p ){
 337                _console_suggest_prev();
 338             }
 339             else{
 340                _ui_proc_key( event.key.keysym );
 341             }
 342          }
 343          else{
 344             if( event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 345                vg_console.enabled = 1;
 346             }
 347             else {
 348                _ui_proc_key( event.key.keysym );
 349             }
 350          }
 351       }
 352       else if( event.type == SDL_MOUSEWHEEL ){
 353          vg.mouse_wheel[0] += event.wheel.preciseX;
 354          vg.mouse_wheel[1] += event.wheel.preciseY;
 355       }
 356       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 357                event.type == SDL_CONTROLLERDEVICEREMOVED )
 358       {
 359          vg_input_device_event( &event );
 360       }
 361       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 362                event.type == SDL_CONTROLLERBUTTONDOWN ||
 363                event.type == SDL_CONTROLLERBUTTONUP )
 364       {
 365          vg_input_controller_event( &event );
 366       }
 367       else if( event.type == SDL_MOUSEMOTION ){
 368          vg.mouse_delta[0] += event.motion.xrel;
 369          vg.mouse_delta[1] += event.motion.yrel;
 370       }
 371       else if( event.type == SDL_WINDOWEVENT ){
 372          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 373             int w, h;
 374             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 375
 376             if( !w || !h ){
 377                vg_warn( "Got a invalid framebuffer size: "
 378                         "%dx%d... ignoring\n", w, h );
 379             }
 380             else{
 381                vg.window_x = w;
 382                vg.window_y = h;
 383
 384                vg_framebuffer_resize(w,h);
 385             }
 386          }
 387          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 388             vg.window_should_close = 1;
 389          }
 390       }
 391       else if( event.type == SDL_TEXTINPUT ){
 392          ui_proc_utf8( event.text.text );
 393       }
 394    }
 395
 396    vg.mouse_pos[0] += vg.mouse_delta[0];
 397    vg.mouse_pos[1] += vg.mouse_delta[1];
 398 }
 399
 400 static void _vg_gameloop_update(void)
 401 {
 402    vg_profile_begin( &vg_prof_update );
 403
 404    vg.engine_stage = k_engine_stage_update;
 405    vg_pre_update();
 406
 407    /* Fixed update loop */
 408    vg.engine_stage = k_engine_stage_update_fixed;
 409
 410    vg.fixed_iterations = 0;
 411    vg_lines.allow_input = 1;
 412    vg.time_fixed_accumulator += vg.time_delta;
 413
 414    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 415       vg_fixed_update();
 416       vg_lines.allow_input = 0;
 417       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 418
 419       vg.fixed_iterations ++;
 420       if( vg.fixed_iterations == 8 ){
 421          break;
 422       }
 423    }
 424    vg_lines.allow_input = 1;
 425    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 426
 427    vg.engine_stage = k_engine_stage_update;
 428    vg_post_update();
 429    vg_profile_end( &vg_prof_update );
 430 }
 431
 432 static void _vg_gameloop_render(void)
 433 {
 434    vg_profile_begin( &vg_prof_render );
 435
 436    /* render */
 437    vg.engine_stage = k_engine_stage_rendering;
 438    vg_render();
 439
 440    /* ui */
 441    vg.engine_stage = k_engine_stage_ui;
 442    {
 443       ui_prerender();
 444       if( vg_console.enabled ){
 445          vg_ui.ignore_input_frames = 10;
 446          vg_gui();
 447          vg_ui.ignore_input_frames = 0;
 448          vg_ui.wants_mouse = 1;
 449          _vg_console_draw();
 450       }
 451       else vg_gui();
 452
 453       /* vg tools */
 454 #ifndef VG_NO_AUDIO
 455       audio_debug_ui( vg.pv );
 456 #endif
 457
 458                 /* profiling */
 459       int frame_target = vg.display_refresh_rate;
 460       if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 461       vg_profile_drawn(
 462             (struct vg_profile *[]){
 463                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 464             (1.0f/(float)frame_target)*1000.0f,
 465             (ui_rect){ 4, 4, 250, 0 }, 0
 466       );
 467       if( vg_profiler ){
 468          char perf[256];
 469
 470          snprintf( perf, 255,
 471                "x: %d y: %d\n"
 472                "refresh: %d (%.1fms)\n"
 473                "samples: %d\n"
 474                "iterations: %d (acc: %.3fms%%)\n"
 475                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 476                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 477                vg.window_x, vg.window_y,
 478                frame_target, (1.0f/(float)frame_target)*1000.0f,
 479                vg.samples,
 480                vg.fixed_iterations,
 481                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 482                vg.time_real, vg.time_delta, vg.time_rate,
 483                vg.time_fixed_extrapolate, vg.time_frame_delta,
 484                vg.time_spinning );
 485
 486          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 487       }
 488       ui_postrender();
 489    }
 490
 491    vg_profile_end( &vg_prof_render );
 492 }
 493
 494 static int vg_framefilter( double dt )
 495 {
 496    if( (vg.fps_limit <= 0) && (vg.vsync_feature != k_vsync_feature_error) ){
 497       /* turn on vsync if not enabled */
 498
 499       enum vsync_feature requested = k_vsync_feature_enabled;
 500       if( vg.fps_limit < 0 ) requested = k_vsync_feature_enabled_adaptive;
 501
 502       if( vg.vsync_feature != requested ){
 503          vg_info( "Setting swap interval\n" );
 504
 505          int swap_interval = 1;
 506          if( requested == k_vsync_feature_enabled_adaptive ) swap_interval = -1;
 507
 508          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 509             if( requested == k_vsync_feature_enabled ){
 510                vg_error( "Vsync is not supported by your system\n" );
 511                vg_warn( "You may be overriding it in your"
 512                         " graphics control panel.\n" );
 513             }
 514             else{
 515                vg_error( "Adaptive Vsync is not supported by your system\n" );
 516             }
 517
 518             vg.vsync_feature = k_vsync_feature_error;
 519             vg.fps_limit = vg.display_refresh_rate;
 520
 521             /* TODO: Make popup to notify user that this happened */
 522             return 1;
 523          }
 524          else{
 525             vg_success( "Vsync enabled (%d)\n", requested );
 526             vg.vsync_feature = requested;
 527          }
 528       }
 529
 530       return 0;
 531    }
 532
 533    if( vg.vsync_feature != k_vsync_feature_disabled ){
 534       SDL_GL_SetSwapInterval( 0 );
 535       vg.vsync_feature = k_vsync_feature_disabled;
 536    }
 537
 538    if( vg.fps_limit < 25 ) vg.fps_limit = 25;
 539    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 540
 541    double min_frametime = 1.0/(double)vg.fps_limit;
 542    if( vg.time_frame_delta < min_frametime ){
 543       /* TODO: we can use high res nanosleep on Linux here */
 544       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 545       u32 ms = (u32)floor( sleep_ms );
 546
 547       if( ms ){
 548          SDL_Delay( ms );
 549       }
 550       else{
 551          vg.time_spinning ++;
 552       }
 553
 554       return 1;
 555    }
 556
 557    return 0;
 558 }
 559
 560 static int _vg_crashscreen(void)
 561 {
 562 #if 0
 563    if( vg_getkey( SDLK_ESCAPE ) )
 564       return 1;
 565 #endif
 566
 567    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 568    glEnable(GL_BLEND);
 569    glDisable(GL_DEPTH_TEST);
 570    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 571    glBlendEquation(GL_FUNC_ADD);
 572
 573    glClearColor( 0.15f + sinf(vg.time_real)*0.1f, 0.0f, 0.0f,1.0f );
 574    glClear( GL_COLOR_BUFFER_BIT );
 575    glViewport( 0,0, vg.window_x, vg.window_y );
 576
 577    _vg_render_log();
 578
 579    return 0;
 580 }
 581
 582 static void _vg_gameloop(void){
 583    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 584
 585    vg.time_hp = SDL_GetPerformanceCounter();
 586    vg.time_hp_last = vg.time_hp;
 587
 588    int post_start = 0;
 589    while(1){
 590
 591       vg.time_hp = SDL_GetPerformanceCounter();
 592       u64 udt = vg.time_hp - vg.time_hp_last;
 593       vg.time_hp_last = vg.time_hp;
 594
 595       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 596
 597       vg.time_frame_delta += dt;
 598       vg_run_async_checked();
 599
 600       if( vg_framefilter( dt ) )
 601          continue;
 602
 603       vg_profile_begin( &vg_prof_swap );
 604       SDL_GL_SwapWindow( vg.window );
 605       vg_profile_end( &vg_prof_swap );
 606
 607       enum engine_status status = _vg_engine_status();
 608
 609       vg.time_real += vg.time_frame_delta;
 610       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 611       vg.time += vg.time_delta;
 612
 613       _vg_process_events();
 614
 615       if( vg.window_should_close )
 616          break;
 617
 618       if( status == k_engine_status_crashed ){
 619          if( _vg_crashscreen() )
 620             break;
 621       }
 622       else{
 623          if( status == k_engine_status_running ){
 624             _vg_gameloop_update();
 625             _vg_gameloop_render();
 626          }
 627          else{
 628             _vg_loader_render();
 629          }
 630       }
 631
 632       if( vg.loader_ring > 0.01f ){
 633          _vg_loader_render_ring( vg.loader_ring );
 634          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 635       }
 636
 637       vg.time_frame_delta = 0.0;
 638       vg.time_spinning = 0;
 639    }
 640 }
 641
 642 static void _vg_process_launch_opts_internal( int argc, char *argv[] )
 643 {
 644    char *arg;
 645    while( vg_argp( argc, argv ) ){
 646       if( (arg = vg_opt_arg( 'w' )) ){
 647          vg.window_x = atoi( arg );
 648       }
 649
 650       if( (arg = vg_opt_arg( 'h' )) ){
 651          vg.window_y = atoi( arg );
 652       }
 653
 654       if( (arg = vg_long_opt_arg( "samples" )) ){
 655          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 656       }
 657
 658       if(  vg_long_opt( "use-libc-malloc" ) ){
 659          vg_mem.use_libc_malloc = 1;
 660       }
 661
 662       if( vg_long_opt( "high-performance" ) ){
 663          vg.quality_profile = k_quality_profile_low;
 664       }
 665
 666       vg_launch_opt();
 667    }
 668 }
 669
 670 static void _vg_init_window( const char *window_name )
 671 {
 672    vg_info( "SDL_INIT\n" );
 673
 674    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 675       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 676       exit(0);
 677    }
 678
 679 #ifndef VG_NO_AUDIO
 680    SDL_InitSubSystem( SDL_INIT_AUDIO );
 681 #endif
 682    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 683
 684    char *exe_basepath = SDL_GetBasePath();
 685    u32 len = vg_align8( strlen(exe_basepath)+1 );
 686    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 687    strcpy( dest, exe_basepath );
 688    SDL_free( exe_basepath );
 689    vg.base_path = dest;
 690
 691    vg_info( "Basepath: %s\n", vg.base_path );
 692
 693    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 694    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 695    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 696    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 697                            SDL_GL_CONTEXT_PROFILE_CORE );
 698
 699    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 700                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 701
 702    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 703    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 704    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 705    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 706    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 707
 708    /*
 709     * Get monitor information
 710     */
 711    vg_info( "Getting display count\n" );
 712    int display_count = 0,
 713        display_index = 0,
 714        mode_index = 0;
 715
 716    SDL_DisplayMode video_mode;
 717    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 718       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 719       SDL_Quit();
 720       exit(0);
 721    }
 722
 723    vg.display_refresh_rate = video_mode.refresh_rate;
 724    vg.window_x = video_mode.w;
 725    vg.window_y = video_mode.h;
 726
 727 #ifdef VG_DEVWINDOW
 728    vg.window_x = 1200;
 729    vg.window_y = 880;
 730 #endif
 731
 732 #ifndef _WIN32
 733         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 734         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 735         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 736 #endif
 737
 738    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 739                                              vg.display_refresh_rate );
 740
 741    /* TODO: Allow selecting closest video mode from launch opts */
 742    if((vg.window = SDL_CreateWindow( window_name,
 743
 744 #ifdef VG_DEVWINDOW
 745          0, 0, vg.window_x, vg.window_y,
 746          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL|SDL_WINDOW_INPUT_GRABBED
 747       ))){
 748       SDL_SetWindowPosition( vg.window, video_mode.w-vg.window_x, 0 );
 749    }
 750 #else
 751                                      0, 0,
 752                                      vg.window_x, vg.window_y,
 753
 754                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 755                                      SDL_WINDOW_OPENGL |
 756                                      SDL_WINDOW_INPUT_GRABBED
 757                                      )))
 758    {
 759       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 760          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 761          SDL_Quit();
 762          exit(0);
 763       }
 764    }
 765 #endif
 766    else{
 767       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 768       exit(0);
 769    }
 770
 771    SDL_RaiseWindow( vg.window );
 772
 773    vg_info( "CreateContext\n" );
 774
 775    /* ????? */
 776    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 777
 778    /*
 779     * OpenGL loading
 780     */
 781    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 782       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 783       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 784    }
 785    else{
 786       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 787       SDL_Quit();
 788       exit(0);
 789    }
 790
 791    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 792       vg_error( "Glad Failed to initialize\n" );
 793       SDL_GL_DeleteContext( vg.gl_context );
 794       SDL_Quit();
 795       exit(0);
 796    }
 797
 798    const unsigned char* glver = glGetString( GL_VERSION );
 799    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 800
 801    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 802
 803    SDL_DisplayMode dispmode;
 804    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 805       if( dispmode.refresh_rate ){
 806          vg.display_refresh_rate = dispmode.refresh_rate;
 807       }
 808    }
 809
 810    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 811       vg.display_refresh_rate = 60;
 812    }
 813
 814    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 815
 816 #if defined(_WIN32) || defined(VG_DEVWINDOW)
 817    vg.fps_limit = vg.display_refresh_rate;
 818 #else
 819    vg.fps_limit = 0;
 820 #endif
 821 }
 822
 823 static void _vg_terminate(void)
 824 {
 825    /* Shutdown */
 826    _vg_console_write_persistent();
 827
 828    SDL_AtomicLock( &vg.sl_status );
 829    vg.engine_status = k_engine_status_none;
 830    SDL_AtomicUnlock( &vg.sl_status );
 831
 832    _vg_loader_free();
 833
 834    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 835
 836    SDL_GL_DeleteContext( vg.gl_context );
 837    SDL_Quit();
 838    exit(0);
 839 }
 840
 841 static void vg_enter( int argc, char *argv[], const char *window_name )
 842 {
 843    vg_rand_seed( 461 );
 844    _vg_process_launch_opts_internal( argc, argv );
 845
 846    /* Systems init */
 847    vg_alloc_quota();
 848    _vg_console_init();
 849
 850    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 851    _vg_init_window( window_name );
 852
 853    vg_async_init();
 854    SDL_SetRelativeMouseMode(1);
 855
 856    vg.thread_id_main = SDL_GetThreadID(NULL);
 857
 858    /* Opengl-required systems */
 859    _vg_ui_init();
 860    _vg_loader_init();
 861
 862    vg.engine_status = k_engine_status_load_internal;
 863
 864    _vg_opengl_sync_init();
 865     vg_loader_start( _vg_load_full, NULL );
 866    _vg_gameloop();
 867    _vg_terminate();
 868 }
 869
 870 static void vg_fatal_error( const char *fmt, ... )
 871 {
 872    va_list args;
 873    va_start( args, fmt );
 874    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 875    va_end( args );
 876
 877    vg_print_backtrace();
 878
 879    SDL_AtomicLock( &vg.sl_status );
 880    vg.engine_status = k_engine_status_crashed;
 881    SDL_AtomicUnlock( &vg.sl_status );
 882
 883    if( vg_thread_purpose() == k_thread_purpose_loader ){
 884       longjmp( vg.env_loader_exit, 1 );
 885    }
 886    else{
 887       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 888       _vg_terminate();
 889    }
 890 }
 891
 892 #else /* VG_GAME */
 893
 894 #include "vg_log.h"
 895 static void vg_fatal_error( const char *fmt, ... )
 896 {
 897    va_list args;
 898    va_start( args, fmt );
 899    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 900    va_end( args );
 901    exit(0);
 902 }
 903
 904 #endif /* VG_GAME */
 905
 906 /*
 907  * Graphic cards will check these to force it to use the GPU
 908  */
 909 u32 NvOptimusEnablement = 0x00000001;
 910 int AmdPowerXpressRequestHighPerformance = 1;
 911
 912 #include "vg_log.c"
 913
 914 #endif /* VG_HEADER_H */