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
 310 static void _vg_process_events(void)
 311 {
 312    v2_zero( vg.mouse_wheel );
 313    v2_zero( vg.mouse_delta );
 314
 315    /* Update input */
 316    vg_process_inputs();
 317
 318    /* SDL event loop */
 319    SDL_Event event;
 320    while( SDL_PollEvent( &event ) ){
 321       if( event.type == SDL_KEYDOWN ){
 322          if( vg_console.enabled &&
 323                (vg_ui.focused_control_type != k_ui_control_modal) ){
 324             if( event.key.keysym.sym == SDLK_ESCAPE ||
 325                 event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 326                vg_console.enabled = 0;
 327                ui_defocus_all();
 328             }
 329             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 330                       event.key.keysym.sym == SDLK_n ){
 331                _console_suggest_next();
 332             }
 333             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 334                       event.key.keysym.sym == SDLK_p ){
 335                _console_suggest_prev();
 336             }
 337             else{
 338                _ui_proc_key( event.key.keysym );
 339             }
 340          }
 341          else{
 342             if( event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 343                vg_console.enabled = 1;
 344             }
 345             else {
 346                _ui_proc_key( event.key.keysym );
 347             }
 348          }
 349       }
 350       else if( event.type == SDL_MOUSEWHEEL ){
 351          vg.mouse_wheel[0] += event.wheel.preciseX;
 352          vg.mouse_wheel[1] += event.wheel.preciseY;
 353       }
 354       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 355                event.type == SDL_CONTROLLERDEVICEREMOVED )
 356       {
 357          vg_input_device_event( &event );
 358       }
 359       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 360                event.type == SDL_CONTROLLERBUTTONDOWN ||
 361                event.type == SDL_CONTROLLERBUTTONUP )
 362       {
 363          vg_input_controller_event( &event );
 364       }
 365       else if( event.type == SDL_MOUSEMOTION ){
 366          vg.mouse_delta[0] += event.motion.xrel;
 367          vg.mouse_delta[1] += event.motion.yrel;
 368       }
 369       else if( event.type == SDL_WINDOWEVENT ){
 370          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 371             int w, h;
 372             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 373
 374             if( !w || !h ){
 375                vg_warn( "Got a invalid framebuffer size: "
 376                         "%dx%d... ignoring\n", w, h );
 377             }
 378             else{
 379                vg.window_x = w;
 380                vg.window_y = h;
 381
 382                vg_framebuffer_resize(w,h);
 383             }
 384          }
 385          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 386             vg.window_should_close = 1;
 387          }
 388       }
 389       else if( event.type == SDL_TEXTINPUT ){
 390          ui_proc_utf8( event.text.text );
 391       }
 392    }
 393
 394    vg.mouse_pos[0] += vg.mouse_delta[0];
 395    vg.mouse_pos[1] += vg.mouse_delta[1];
 396 }
 397
 398 static void _vg_gameloop_update(void)
 399 {
 400    vg_profile_begin( &vg_prof_update );
 401
 402    vg.engine_stage = k_engine_stage_update;
 403    vg_pre_update();
 404
 405    /* Fixed update loop */
 406    vg.engine_stage = k_engine_stage_update_fixed;
 407
 408    vg.fixed_iterations = 0;
 409    vg_lines.allow_input = 1;
 410    vg.time_fixed_accumulator += vg.time_delta;
 411
 412    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 413       vg_fixed_update();
 414       vg_lines.allow_input = 0;
 415       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 416
 417       vg.fixed_iterations ++;
 418       if( vg.fixed_iterations == 8 ){
 419          break;
 420       }
 421    }
 422    vg_lines.allow_input = 1;
 423    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 424
 425    vg.engine_stage = k_engine_stage_update;
 426    vg_post_update();
 427    vg_profile_end( &vg_prof_update );
 428 }
 429
 430 static void _vg_gameloop_render(void)
 431 {
 432    vg_profile_begin( &vg_prof_render );
 433
 434    /* render */
 435    vg.engine_stage = k_engine_stage_rendering;
 436    vg_render();
 437
 438    /* ui */
 439    vg.engine_stage = k_engine_stage_ui;
 440    {
 441       ui_prerender();
 442       if( vg_console.enabled ){
 443          vg_ui.ignore_input_frames = 10;
 444          vg_gui();
 445          vg_ui.ignore_input_frames = 0;
 446          vg_ui.wants_mouse = 1;
 447          _vg_console_draw();
 448       }
 449       else vg_gui();
 450
 451       /* vg tools */
 452 #ifndef VG_NO_AUDIO
 453       audio_debug_ui( vg.pv );
 454 #endif
 455
 456                 /* profiling */
 457       int frame_target = vg.display_refresh_rate;
 458       if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 459       vg_profile_drawn(
 460             (struct vg_profile *[]){
 461                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 462             (1.0f/(float)frame_target)*1000.0f,
 463             (ui_rect){ 4, 4, 250, 0 }, 0
 464       );
 465       if( vg_profiler ){
 466          char perf[256];
 467
 468          snprintf( perf, 255,
 469                "x: %d y: %d\n"
 470                "refresh: %d (%.1fms)\n"
 471                "samples: %d\n"
 472                "iterations: %d (acc: %.3fms%%)\n"
 473                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 474                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 475                vg.window_x, vg.window_y,
 476                frame_target, (1.0f/(float)frame_target)*1000.0f,
 477                vg.samples,
 478                vg.fixed_iterations,
 479                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 480                vg.time_real, vg.time_delta, vg.time_rate,
 481                vg.time_fixed_extrapolate, vg.time_frame_delta,
 482                vg.time_spinning );
 483
 484          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 485       }
 486       ui_postrender();
 487    }
 488
 489    vg_profile_end( &vg_prof_render );
 490 }
 491
 492 static int vg_framefilter( double dt )
 493 {
 494    if( (vg.fps_limit <= 0) && (vg.vsync_feature != k_vsync_feature_error) ){
 495       /* turn on vsync if not enabled */
 496
 497       enum vsync_feature requested = k_vsync_feature_enabled;
 498       if( vg.fps_limit < 0 ) requested = k_vsync_feature_enabled_adaptive;
 499
 500       if( vg.vsync_feature != requested ){
 501          vg_info( "Setting swap interval\n" );
 502
 503          int swap_interval = 1;
 504          if( requested == k_vsync_feature_enabled_adaptive ) swap_interval = -1;
 505
 506          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 507             if( requested == k_vsync_feature_enabled ){
 508                vg_error( "Vsync is not supported by your system\n" );
 509                vg_warn( "You may be overriding it in your"
 510                         " graphics control panel.\n" );
 511             }
 512             else{
 513                vg_error( "Adaptive Vsync is not supported by your system\n" );
 514             }
 515
 516             vg.vsync_feature = k_vsync_feature_error;
 517             vg.fps_limit = vg.display_refresh_rate;
 518
 519             /* TODO: Make popup to notify user that this happened */
 520             return 1;
 521          }
 522          else{
 523             vg_success( "Vsync enabled (%d)\n", requested );
 524             vg.vsync_feature = requested;
 525          }
 526       }
 527
 528       return 0;
 529    }
 530
 531    if( vg.vsync_feature != k_vsync_feature_disabled ){
 532       SDL_GL_SetSwapInterval( 0 );
 533       vg.vsync_feature = k_vsync_feature_disabled;
 534    }
 535
 536    if( vg.fps_limit < 25 ) vg.fps_limit = 25;
 537    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 538
 539    double min_frametime = 1.0/(double)vg.fps_limit;
 540    if( vg.time_frame_delta < min_frametime ){
 541       /* TODO: we can use high res nanosleep on Linux here */
 542       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 543       u32 ms = (u32)floor( sleep_ms );
 544
 545       if( ms ){
 546          SDL_Delay( ms );
 547       }
 548       else{
 549          vg.time_spinning ++;
 550       }
 551
 552       return 1;
 553    }
 554
 555    return 0;
 556 }
 557
 558 static int _vg_crashscreen(void)
 559 {
 560 #if 0
 561    if( vg_getkey( SDLK_ESCAPE ) )
 562       return 1;
 563 #endif
 564
 565    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 566    glEnable(GL_BLEND);
 567    glDisable(GL_DEPTH_TEST);
 568    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 569    glBlendEquation(GL_FUNC_ADD);
 570
 571    glClearColor( 0.15f + sinf(vg.time_real)*0.1f, 0.0f, 0.0f,1.0f );
 572    glClear( GL_COLOR_BUFFER_BIT );
 573    glViewport( 0,0, vg.window_x, vg.window_y );
 574
 575    _vg_render_log();
 576
 577    return 0;
 578 }
 579
 580 static void _vg_gameloop(void){
 581    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 582
 583    vg.time_hp = SDL_GetPerformanceCounter();
 584    vg.time_hp_last = vg.time_hp;
 585
 586    int post_start = 0;
 587    while(1){
 588
 589       vg.time_hp = SDL_GetPerformanceCounter();
 590       u64 udt = vg.time_hp - vg.time_hp_last;
 591       vg.time_hp_last = vg.time_hp;
 592
 593       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 594
 595       vg.time_frame_delta += dt;
 596
 597       if( vg_framefilter( dt ) )
 598          continue;
 599
 600       vg_profile_begin( &vg_prof_swap );
 601       SDL_GL_SwapWindow( vg.window );
 602       vg_profile_end( &vg_prof_swap );
 603
 604       enum engine_status status = _vg_engine_status();
 605
 606       vg.time_real += vg.time_frame_delta;
 607       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 608       vg.time += vg.time_delta;
 609
 610       vg_run_async_checked();
 611       _vg_process_events();
 612
 613       if( vg.window_should_close )
 614          break;
 615
 616       if( status == k_engine_status_crashed ){
 617          if( _vg_crashscreen() )
 618             break;
 619       }
 620       else{
 621          if( status == k_engine_status_running ){
 622             _vg_gameloop_update();
 623             _vg_gameloop_render();
 624          }
 625          else{
 626             _vg_loader_render();
 627          }
 628       }
 629
 630       if( vg.loader_ring > 0.01f ){
 631          _vg_loader_render_ring( vg.loader_ring );
 632          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 633       }
 634
 635       vg.time_frame_delta = 0.0;
 636       vg.time_spinning = 0;
 637    }
 638 }
 639
 640 static void _vg_process_launch_opts_internal( int argc, char *argv[] )
 641 {
 642    char *arg;
 643    while( vg_argp( argc, argv ) ){
 644       if( (arg = vg_opt_arg( 'w' )) ){
 645          vg.window_x = atoi( arg );
 646       }
 647
 648       if( (arg = vg_opt_arg( 'h' )) ){
 649          vg.window_y = atoi( arg );
 650       }
 651
 652       if( (arg = vg_long_opt_arg( "samples" )) ){
 653          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 654       }
 655
 656       if(  vg_long_opt( "use-libc-malloc" ) ){
 657          vg_mem.use_libc_malloc = 1;
 658       }
 659
 660       if( vg_long_opt( "high-performance" ) ){
 661          vg.quality_profile = k_quality_profile_low;
 662       }
 663
 664       vg_launch_opt();
 665    }
 666 }
 667
 668 static void _vg_init_window( const char *window_name )
 669 {
 670    vg_info( "SDL_INIT\n" );
 671
 672    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 673       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 674       exit(0);
 675    }
 676
 677 #ifndef VG_NO_AUDIO
 678    SDL_InitSubSystem( SDL_INIT_AUDIO );
 679 #endif
 680    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 681
 682    char *exe_basepath = SDL_GetBasePath();
 683    u32 len = vg_align8( strlen(exe_basepath)+1 );
 684    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 685    strcpy( dest, exe_basepath );
 686    SDL_free( exe_basepath );
 687    vg.base_path = dest;
 688
 689    vg_info( "Basepath: %s\n", vg.base_path );
 690
 691    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 692    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 693    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 694    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 695                            SDL_GL_CONTEXT_PROFILE_CORE );
 696
 697    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 698                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 699
 700    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 701    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 702    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 703    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 704    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 705
 706    /*
 707     * Get monitor information
 708     */
 709    vg_info( "Getting display count\n" );
 710    int display_count = 0,
 711        display_index = 0,
 712        mode_index = 0;
 713
 714    SDL_DisplayMode video_mode;
 715    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 716       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 717       SDL_Quit();
 718       exit(0);
 719    }
 720
 721    vg.display_refresh_rate = video_mode.refresh_rate;
 722    vg.window_x = video_mode.w;
 723    vg.window_y = video_mode.h;
 724
 725 #ifdef VG_DEVWINDOW
 726    vg.window_x = 1200;
 727    vg.window_y = 880;
 728 #endif
 729
 730 #ifndef _WIN32
 731         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 732         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 733         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 734 #endif
 735
 736    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 737                                              vg.display_refresh_rate );
 738
 739    /* TODO: Allow selecting closest video mode from launch opts */
 740    if((vg.window = SDL_CreateWindow( window_name,
 741
 742 #ifdef VG_DEVWINDOW
 743          0, 0, vg.window_x, vg.window_y,
 744          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL|SDL_WINDOW_INPUT_GRABBED
 745       ))){
 746       SDL_SetWindowPosition( vg.window, video_mode.w-vg.window_x, 0 );
 747    }
 748 #else
 749                                      0, 0,
 750                                      vg.window_x, vg.window_y,
 751
 752                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 753                                      SDL_WINDOW_OPENGL |
 754                                      SDL_WINDOW_INPUT_GRABBED
 755                                      )))
 756    {
 757       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 758          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 759          SDL_Quit();
 760          exit(0);
 761       }
 762    }
 763 #endif
 764    else{
 765       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 766       exit(0);
 767    }
 768
 769    SDL_RaiseWindow( vg.window );
 770
 771    vg_info( "CreateContext\n" );
 772
 773    /* ????? */
 774    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 775
 776    /*
 777     * OpenGL loading
 778     */
 779    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 780       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 781       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 782    }
 783    else{
 784       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 785       SDL_Quit();
 786       exit(0);
 787    }
 788
 789    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 790       vg_error( "Glad Failed to initialize\n" );
 791       SDL_GL_DeleteContext( vg.gl_context );
 792       SDL_Quit();
 793       exit(0);
 794    }
 795
 796    const unsigned char* glver = glGetString( GL_VERSION );
 797    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 798
 799    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 800
 801    SDL_DisplayMode dispmode;
 802    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 803       if( dispmode.refresh_rate ){
 804          vg.display_refresh_rate = dispmode.refresh_rate;
 805       }
 806    }
 807
 808    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 809       vg.display_refresh_rate = 60;
 810    }
 811
 812    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 813
 814 #if defined(_WIN32) || defined(VG_DEVWINDOW)
 815    vg.fps_limit = vg.display_refresh_rate;
 816 #else
 817    vg.fps_limit = 0;
 818 #endif
 819 }
 820
 821 static void _vg_terminate(void)
 822 {
 823    /* Shutdown */
 824    _vg_console_write_persistent();
 825
 826    SDL_AtomicLock( &vg.sl_status );
 827    vg.engine_status = k_engine_status_none;
 828    SDL_AtomicUnlock( &vg.sl_status );
 829
 830    _vg_loader_free();
 831
 832    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 833
 834    SDL_GL_DeleteContext( vg.gl_context );
 835    SDL_Quit();
 836    exit(0);
 837 }
 838
 839 static void vg_enter( int argc, char *argv[], const char *window_name )
 840 {
 841    vg_rand_seed( 461 );
 842    _vg_process_launch_opts_internal( argc, argv );
 843
 844    /* Systems init */
 845    vg_alloc_quota();
 846    _vg_console_init();
 847
 848    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 849    _vg_init_window( window_name );
 850
 851    vg_async_init();
 852    SDL_SetRelativeMouseMode(1);
 853
 854    vg.thread_id_main = SDL_GetThreadID(NULL);
 855
 856    /* Opengl-required systems */
 857    _vg_ui_init();
 858    _vg_loader_init();
 859
 860    vg.engine_status = k_engine_status_load_internal;
 861
 862    _vg_opengl_sync_init();
 863     vg_loader_start( _vg_load_full, NULL );
 864    _vg_gameloop();
 865    _vg_terminate();
 866 }
 867
 868 static void vg_fatal_error( const char *fmt, ... )
 869 {
 870    va_list args;
 871    va_start( args, fmt );
 872    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 873    va_end( args );
 874
 875    vg_print_backtrace();
 876
 877    SDL_AtomicLock( &vg.sl_status );
 878    vg.engine_status = k_engine_status_crashed;
 879    SDL_AtomicUnlock( &vg.sl_status );
 880
 881    if( vg_thread_purpose() == k_thread_purpose_loader ){
 882       longjmp( vg.env_loader_exit, 1 );
 883    }
 884    else{
 885       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 886       _vg_terminate();
 887    }
 888 }
 889
 890 #else /* VG_GAME */
 891
 892 #include "vg_log.h"
 893 static void vg_fatal_error( const char *fmt, ... )
 894 {
 895    va_list args;
 896    va_start( args, fmt );
 897    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 898    va_end( args );
 899    exit(0);
 900 }
 901
 902 #endif /* VG_GAME */
 903
 904 /*
 905  * Graphic cards will check these to force it to use the GPU
 906  */
 907 u32 NvOptimusEnablement = 0x00000001;
 908 int AmdPowerXpressRequestHighPerformance = 1;
 909
 910 #include "vg_log.c"
 911
 912 #endif /* VG_HEADER_H */