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,
 131        vsync;
 132
 133    enum vsync_feature{
 134       k_vsync_feature_disabled=0,
 135       k_vsync_feature_enabled=1,
 136       k_vsync_feature_enabled_adaptive=2,
 137       k_vsync_feature_error=3
 138    }
 139    vsync_feature;
 140
 141    double mouse_pos[2];
 142    v2f mouse_delta,
 143        mouse_wheel;
 144
 145    /* Runtime */
 146    double time,
 147           time_real,
 148           time_delta,
 149           time_rate,
 150
 151           time_fixed_accumulator,
 152           time_fixed_extrapolate,
 153           time_frame_delta;
 154
 155    u64 time_hp, time_hp_last, time_spinning;
 156
 157    int fixed_iterations;
 158
 159    enum engine_stage{
 160       k_engine_stage_none,
 161       k_engine_stage_update,
 162       k_engine_stage_update_fixed,
 163       k_engine_stage_rendering,
 164       k_engine_stage_ui
 165    }
 166    engine_stage;
 167
 168    /* graphics */
 169    m4x4f pv;
 170    enum quality_profile{
 171       k_quality_profile_high = 0,
 172       k_quality_profile_low = 1,
 173    }
 174    quality_profile;
 175
 176    float loader_ring;
 177    GLuint tex_missing;
 178 }
 179 static vg = { .time_rate = 1.0 };
 180 const char *vg_get_basepath(void){
 181    return vg.base_path;
 182 }
 183
 184 enum vg_thread_purpose
 185 {
 186    k_thread_purpose_nothing,
 187    k_thread_purpose_main,
 188    k_thread_purpose_loader
 189 };
 190
 191 #include "vg_async.h"
 192
 193 static enum engine_status _vg_engine_status(void)
 194 {
 195    SDL_AtomicLock( &vg.sl_status );
 196    enum engine_status status = vg.engine_status;
 197    SDL_AtomicUnlock( &vg.sl_status );
 198
 199    return status;
 200 }
 201
 202 static enum vg_thread_purpose vg_thread_purpose(void)
 203 {
 204    SDL_AtomicLock( &vg.sl_status );
 205
 206    if( vg.thread_id_main == SDL_GetThreadID(NULL) ){
 207       SDL_AtomicUnlock( &vg.sl_status );
 208       return k_thread_purpose_main;
 209    }
 210    else{
 211       SDL_AtomicUnlock( &vg.sl_status );
 212       return k_thread_purpose_loader;
 213    }
 214 }
 215
 216 static void vg_assert_thread( enum vg_thread_purpose required ){
 217    enum vg_thread_purpose purpose = vg_thread_purpose();
 218
 219    if( purpose != required ){
 220       vg_fatal_error( "thread_purpose must be %u not %u\n", required, purpose );
 221    }
 222 }
 223
 224 static void _vg_opengl_sync_init(void)
 225 {
 226    vg.sem_loader = SDL_CreateSemaphore(1);
 227 }
 228
 229 static void vg_checkgl( const char *src_info );
 230 #define VG_STRINGIT( X ) #X
 231 #define VG_CHECK_GL_ERR() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
 232
 233 #include "vg_console.h"
 234 #include "vg_profiler.h"
 235 #ifndef VG_NO_AUDIO
 236   #include "vg_audio.h"
 237 #endif
 238 #include "vg_shader.h"
 239 #include "vg_tex.h"
 240 #include "vg_input.h"
 241 #include "vg_imgui.h"
 242 #include "vg_lines.h"
 243 #include "vg_loader.h"
 244 #include "vg_opt.h"
 245
 246 /* Diagnostic */
 247 static struct vg_profile vg_prof_update = {.name="update()"},
 248                             vg_prof_render = {.name="render()"},
 249                             vg_prof_swap   = {.name="swap"};
 250
 251 static void vg_checkgl( const char *src_info )
 252 {
 253    int fail = 0;
 254
 255    GLenum err;
 256    while( (err = glGetError()) != GL_NO_ERROR ){
 257       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
 258       fail = 1;
 259    }
 260
 261    if( fail )
 262       vg_fatal_error( "OpenGL Error" );
 263 }
 264
 265 static void async_vg_bake_shaders( void *payload, u32 size )
 266 {
 267    vg_shaders_compile();
 268 }
 269
 270 static void vg_bake_shaders(void)
 271 {
 272    vg_console_reg_cmd( "reload_shaders", vg_shaders_live_recompile, NULL );
 273    vg_async_call( async_vg_bake_shaders, NULL, 0 );
 274 }
 275
 276 void async_internal_complete( void *payload, u32 size )
 277 {
 278    vg_success( "Internal async setup complete\n" );
 279    SDL_AtomicLock( &vg.sl_status );
 280
 281    if( vg.engine_status == k_engine_status_crashed ){
 282       SDL_AtomicUnlock( &vg.sl_status );
 283       return;
 284    }
 285    else{
 286       vg.engine_status = k_engine_status_running;
 287    }
 288
 289    SDL_AtomicUnlock( &vg.sl_status );
 290 }
 291
 292 static void _vg_load_full( void *data )
 293 {
 294    vg_preload();
 295
 296    /* internal */
 297    vg_tex2d_replace_with_error( &vg.tex_missing );
 298    vg_loader_step( vg_input_init, vg_input_free );
 299    vg_loader_step( vg_lines_init, NULL );
 300 #ifndef VG_NO_AUDIO
 301    vg_loader_step( vg_audio_init, vg_audio_free );
 302 #endif
 303    vg_loader_step( vg_profiler_init, NULL );
 304
 305    vg_async_call( async_internal_complete, NULL, 0 );
 306
 307    /* client */
 308    vg_load();
 309
 310    vg_success( "Client loaded in %fs\n", vg.time_real );
 311 }
 312
 313 static void _vg_process_events(void)
 314 {
 315    v2_zero( vg.mouse_wheel );
 316    v2_zero( vg.mouse_delta );
 317
 318    /* Update input */
 319    vg_process_inputs();
 320
 321    /* SDL event loop */
 322    SDL_Event event;
 323    while( SDL_PollEvent( &event ) ){
 324       if( event.type == SDL_KEYDOWN ){
 325          if( vg_console.enabled &&
 326                (vg_ui.focused_control_type != k_ui_control_modal) ){
 327             if( event.key.keysym.sym == SDLK_ESCAPE ||
 328                 event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 329                vg_console.enabled = 0;
 330                ui_defocus_all();
 331             }
 332             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 333                       event.key.keysym.sym == SDLK_n ){
 334                _console_suggest_next();
 335             }
 336             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 337                       event.key.keysym.sym == SDLK_p ){
 338                _console_suggest_prev();
 339             }
 340             else{
 341                _ui_proc_key( event.key.keysym );
 342             }
 343          }
 344          else{
 345             if( event.key.keysym.scancode == SDL_SCANCODE_GRAVE ){
 346                vg_console.enabled = 1;
 347             }
 348             else {
 349                _ui_proc_key( event.key.keysym );
 350             }
 351          }
 352       }
 353       else if( event.type == SDL_MOUSEWHEEL ){
 354          vg.mouse_wheel[0] += event.wheel.preciseX;
 355          vg.mouse_wheel[1] += event.wheel.preciseY;
 356       }
 357       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 358                event.type == SDL_CONTROLLERDEVICEREMOVED )
 359       {
 360          vg_input_device_event( &event );
 361       }
 362       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 363                event.type == SDL_CONTROLLERBUTTONDOWN ||
 364                event.type == SDL_CONTROLLERBUTTONUP )
 365       {
 366          vg_input_controller_event( &event );
 367       }
 368       else if( event.type == SDL_MOUSEMOTION ){
 369          vg.mouse_delta[0] += event.motion.xrel;
 370          vg.mouse_delta[1] += event.motion.yrel;
 371       }
 372       else if( event.type == SDL_WINDOWEVENT ){
 373          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 374             int w, h;
 375             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 376
 377             if( !w || !h ){
 378                vg_warn( "Got a invalid framebuffer size: "
 379                         "%dx%d... ignoring\n", w, h );
 380             }
 381             else{
 382                vg.window_x = w;
 383                vg.window_y = h;
 384
 385                vg_framebuffer_resize(w,h);
 386             }
 387          }
 388          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 389             vg.window_should_close = 1;
 390          }
 391       }
 392       else if( event.type == SDL_TEXTINPUT ){
 393          ui_proc_utf8( event.text.text );
 394       }
 395    }
 396
 397    vg.mouse_pos[0] += vg.mouse_delta[0];
 398    vg.mouse_pos[1] += vg.mouse_delta[1];
 399 }
 400
 401 static void _vg_gameloop_update(void)
 402 {
 403    vg_profile_begin( &vg_prof_update );
 404
 405    vg.engine_stage = k_engine_stage_update;
 406    vg_pre_update();
 407
 408    /* Fixed update loop */
 409    vg.engine_stage = k_engine_stage_update_fixed;
 410
 411    vg.fixed_iterations = 0;
 412    vg_lines.allow_input = 1;
 413    vg.time_fixed_accumulator += vg.time_delta;
 414
 415    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 416       vg_fixed_update();
 417       vg_lines.allow_input = 0;
 418       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 419
 420       vg.fixed_iterations ++;
 421       if( vg.fixed_iterations == 8 ){
 422          break;
 423       }
 424    }
 425    vg_lines.allow_input = 1;
 426    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 427
 428    vg.engine_stage = k_engine_stage_update;
 429    vg_post_update();
 430    vg_profile_end( &vg_prof_update );
 431 }
 432
 433 static void _vg_gameloop_render(void)
 434 {
 435    vg_profile_begin( &vg_prof_render );
 436
 437    /* render */
 438    vg.engine_stage = k_engine_stage_rendering;
 439    vg_render();
 440
 441    /* ui */
 442    vg.engine_stage = k_engine_stage_ui;
 443    {
 444       ui_prerender();
 445       if( vg_console.enabled ){
 446          vg_ui.ignore_input_frames = 10;
 447          vg_gui();
 448          vg_ui.ignore_input_frames = 0;
 449          vg_ui.wants_mouse = 1;
 450          _vg_console_draw();
 451       }
 452       else vg_gui();
 453
 454       /* vg tools */
 455 #ifndef VG_NO_AUDIO
 456       audio_debug_ui( vg.pv );
 457 #endif
 458
 459                 /* profiling */
 460       int frame_target = vg.display_refresh_rate;
 461       if( vg.fps_limit > 0 ) frame_target = vg.fps_limit;
 462       vg_profile_drawn(
 463             (struct vg_profile *[]){
 464                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 465             (1.0f/(float)frame_target)*1000.0f,
 466             (ui_rect){ 4, 4, 250, 0 }, 0
 467       );
 468       if( vg_profiler ){
 469          char perf[256];
 470
 471          snprintf( perf, 255,
 472                "x: %d y: %d\n"
 473                "refresh: %d (%.1fms)\n"
 474                "samples: %d\n"
 475                "iterations: %d (acc: %.3fms%%)\n"
 476                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 477                "      extrap(%.2f) frame(%.2f) spin( "PRINTF_U64" )\n",
 478                vg.window_x, vg.window_y,
 479                frame_target, (1.0f/(float)frame_target)*1000.0f,
 480                vg.samples,
 481                vg.fixed_iterations,
 482                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 483                vg.time_real, vg.time_delta, vg.time_rate,
 484                vg.time_fixed_extrapolate, vg.time_frame_delta,
 485                vg.time_spinning );
 486
 487          ui_text( (ui_rect){258, 4+24+12+12,900,900},perf,1,0,k_ui_align_left);
 488       }
 489       ui_postrender();
 490    }
 491
 492    vg_profile_end( &vg_prof_render );
 493 }
 494
 495 static void vg_changevsync(void){
 496    if( vg.vsync && (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.vsync < 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 )
 507             swap_interval = -1;
 508
 509          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 510             if( requested == k_vsync_feature_enabled ){
 511                vg_error( "Vsync is not supported by your system\n" );
 512                vg_warn( "You may be overriding it in your"
 513                         " graphics control panel.\n" );
 514             }
 515             else{
 516                vg_error( "Adaptive Vsync is not supported by your system\n" );
 517             }
 518
 519             vg.vsync_feature = k_vsync_feature_error;
 520             vg.vsync = 0;
 521             /* TODO: Make popup to notify user that this happened */
 522          }
 523          else{
 524             vg_success( "Vsync enabled (%d)\n", requested );
 525             vg.vsync_feature = requested;
 526          }
 527       }
 528    }
 529    else {
 530       if( vg.vsync_feature != k_vsync_feature_disabled ){
 531          SDL_GL_SetSwapInterval( 0 );
 532          vg.vsync_feature = k_vsync_feature_disabled;
 533       }
 534    }
 535 }
 536
 537 static int vg_framefilter( double dt ){
 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          if( !vg_loader_availible() )
 549             SDL_Delay(1);
 550          else
 551             SDL_Delay(ms);
 552       }
 553       else{
 554          vg.time_spinning ++;
 555       }
 556
 557       return 1;
 558    }
 559
 560    return 0;
 561 }
 562
 563 static int _vg_crashscreen(void)
 564 {
 565 #if 0
 566    if( vg_getkey( SDLK_ESCAPE ) )
 567       return 1;
 568 #endif
 569
 570    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 571    glEnable(GL_BLEND);
 572    glDisable(GL_DEPTH_TEST);
 573    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 574    glBlendEquation(GL_FUNC_ADD);
 575
 576    glClearColor( 0.15f + sinf(vg.time_real)*0.1f, 0.0f, 0.0f,1.0f );
 577    glClear( GL_COLOR_BUFFER_BIT );
 578    glViewport( 0,0, vg.window_x, vg.window_y );
 579
 580    _vg_render_log();
 581
 582    return 0;
 583 }
 584
 585 static void _vg_gameloop(void){
 586    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 587
 588    vg.time_hp = SDL_GetPerformanceCounter();
 589    vg.time_hp_last = vg.time_hp;
 590
 591    int post_start = 0;
 592    while(1){
 593       vg.time_hp = SDL_GetPerformanceCounter();
 594       u64 udt = vg.time_hp - vg.time_hp_last;
 595       vg.time_hp_last = vg.time_hp;
 596
 597       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 598
 599       vg.time_frame_delta += dt;
 600       vg_run_async_checked();
 601
 602       if( vg_framefilter( dt ) )
 603          continue;
 604
 605       vg_changevsync();
 606
 607       vg_profile_begin( &vg_prof_swap );
 608       SDL_GL_SwapWindow( vg.window );
 609       vg_profile_end( &vg_prof_swap );
 610
 611       enum engine_status status = _vg_engine_status();
 612
 613       vg.time_real += vg.time_frame_delta;
 614       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 615       vg.time += vg.time_delta;
 616
 617       _vg_process_events();
 618
 619       if( vg.window_should_close )
 620          break;
 621
 622       if( status == k_engine_status_crashed ){
 623          if( _vg_crashscreen() )
 624             break;
 625       }
 626       else{
 627          if( status == k_engine_status_running ){
 628             _vg_gameloop_update();
 629             _vg_gameloop_render();
 630          }
 631          else{
 632             _vg_loader_render();
 633          }
 634       }
 635
 636       if( vg.loader_ring > 0.01f ){
 637          _vg_loader_render_ring( vg.loader_ring );
 638          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 639       }
 640
 641       vg.time_frame_delta = 0.0;
 642       vg.time_spinning = 0;
 643    }
 644 }
 645
 646 static void _vg_process_launch_opts_internal( int argc, char *argv[] )
 647 {
 648    char *arg;
 649    while( vg_argp( argc, argv ) ){
 650       if( (arg = vg_opt_arg( 'w' )) ){
 651          vg.window_x = atoi( arg );
 652       }
 653
 654       if( (arg = vg_opt_arg( 'h' )) ){
 655          vg.window_y = atoi( arg );
 656       }
 657
 658       if( (arg = vg_long_opt_arg( "samples" )) ){
 659          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 660       }
 661
 662       if(  vg_long_opt( "use-libc-malloc" ) ){
 663          vg_mem.use_libc_malloc = 1;
 664       }
 665
 666       if( vg_long_opt( "high-performance" ) ){
 667          vg.quality_profile = k_quality_profile_low;
 668       }
 669
 670       vg_launch_opt();
 671    }
 672 }
 673
 674 static void _vg_init_window( const char *window_name )
 675 {
 676    vg_info( "SDL_INIT\n" );
 677
 678    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 679       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 680       exit(0);
 681    }
 682
 683 #ifndef VG_NO_AUDIO
 684    SDL_InitSubSystem( SDL_INIT_AUDIO );
 685 #endif
 686    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 687
 688    char *exe_basepath = SDL_GetBasePath();
 689    u32 len = vg_align8( strlen(exe_basepath)+1 );
 690    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 691    strcpy( dest, exe_basepath );
 692    SDL_free( exe_basepath );
 693    vg.base_path = dest;
 694
 695    vg_info( "Basepath: %s\n", vg.base_path );
 696
 697    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 698    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 699    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 700    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 701                            SDL_GL_CONTEXT_PROFILE_CORE );
 702
 703    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 704                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 705
 706    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 707    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 708    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 709    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 710    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 711
 712    /*
 713     * Get monitor information
 714     */
 715    vg_info( "Getting display count\n" );
 716    int display_count = 0,
 717        display_index = 0,
 718        mode_index = 0;
 719
 720    SDL_DisplayMode video_mode;
 721    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 722       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 723       SDL_Quit();
 724       exit(0);
 725    }
 726
 727    vg.display_refresh_rate = video_mode.refresh_rate;
 728    vg.window_x = video_mode.w;
 729    vg.window_y = video_mode.h;
 730
 731 #ifdef VG_DEVWINDOW
 732    vg.window_x = 1200;
 733    vg.window_y = 880;
 734 #endif
 735
 736 #ifndef _WIN32
 737         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 738         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 739         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 740 #endif
 741
 742    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 743                                              vg.display_refresh_rate );
 744
 745    /* TODO: Allow selecting closest video mode from launch opts */
 746    if((vg.window = SDL_CreateWindow( window_name,
 747
 748 #ifdef VG_DEVWINDOW
 749          0, 0, vg.window_x, vg.window_y,
 750          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL|SDL_WINDOW_INPUT_GRABBED
 751       ))){
 752       SDL_SetWindowPosition( vg.window, video_mode.w-vg.window_x, 0 );
 753    }
 754 #else
 755                                      0, 0,
 756                                      vg.window_x, vg.window_y,
 757
 758                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 759                                      SDL_WINDOW_OPENGL |
 760                                      SDL_WINDOW_INPUT_GRABBED
 761                                      )))
 762    {
 763       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 764          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 765          SDL_Quit();
 766          exit(0);
 767       }
 768    }
 769 #endif
 770    else{
 771       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 772       exit(0);
 773    }
 774
 775    SDL_RaiseWindow( vg.window );
 776
 777    vg_info( "CreateContext\n" );
 778
 779    /* ????? */
 780    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 781
 782    /*
 783     * OpenGL loading
 784     */
 785    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 786       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 787       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 788    }
 789    else{
 790       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 791       SDL_Quit();
 792       exit(0);
 793    }
 794
 795    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 796       vg_error( "Glad Failed to initialize\n" );
 797       SDL_GL_DeleteContext( vg.gl_context );
 798       SDL_Quit();
 799       exit(0);
 800    }
 801
 802    const unsigned char* glver = glGetString( GL_VERSION );
 803    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 804
 805    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 806
 807    SDL_DisplayMode dispmode;
 808    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 809       if( dispmode.refresh_rate ){
 810          vg.display_refresh_rate = dispmode.refresh_rate;
 811       }
 812    }
 813
 814    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 815       vg.display_refresh_rate = 60;
 816    }
 817
 818    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 819    vg.fps_limit = vg.display_refresh_rate;
 820
 821 #if defined(_WIN32) || defined(VG_DEVWINDOW)
 822 #else
 823    //vg.vsync = 1;
 824 #endif
 825 }
 826
 827 static void _vg_terminate(void)
 828 {
 829    /* Shutdown */
 830    _vg_console_write_persistent();
 831
 832    SDL_AtomicLock( &vg.sl_status );
 833    vg.engine_status = k_engine_status_none;
 834    SDL_AtomicUnlock( &vg.sl_status );
 835
 836    _vg_loader_free();
 837
 838    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 839
 840    SDL_GL_DeleteContext( vg.gl_context );
 841    SDL_Quit();
 842    exit(0);
 843 }
 844
 845 static void vg_enter( int argc, char *argv[], const char *window_name )
 846 {
 847    vg_rand_seed( 461 );
 848    _vg_process_launch_opts_internal( argc, argv );
 849
 850    /* Systems init */
 851    vg_alloc_quota();
 852    _vg_console_init();
 853
 854    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 855    vg_console_reg_var( "vsync", &vg.vsync, k_var_dtype_i32, VG_VAR_PERSISTENT );
 856    _vg_init_window( window_name );
 857
 858    vg_async_init();
 859    SDL_SetRelativeMouseMode(1);
 860
 861    vg.thread_id_main = SDL_GetThreadID(NULL);
 862
 863    /* Opengl-required systems */
 864    _vg_ui_init();
 865    _vg_loader_init();
 866
 867    vg.engine_status = k_engine_status_load_internal;
 868
 869    _vg_opengl_sync_init();
 870     vg_loader_start( _vg_load_full, NULL );
 871    _vg_gameloop();
 872    _vg_terminate();
 873 }
 874
 875 static void vg_fatal_error( const char *fmt, ... )
 876 {
 877    va_list args;
 878    va_start( args, fmt );
 879    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 880    va_end( args );
 881
 882    vg_print_backtrace();
 883
 884    SDL_AtomicLock( &vg.sl_status );
 885    vg.engine_status = k_engine_status_crashed;
 886    SDL_AtomicUnlock( &vg.sl_status );
 887
 888    if( vg_thread_purpose() == k_thread_purpose_loader ){
 889       longjmp( vg.env_loader_exit, 1 );
 890    }
 891    else{
 892       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 893       _vg_terminate();
 894    }
 895 }
 896
 897 #else /* VG_GAME */
 898
 899 #include "vg_log.h"
 900 static void vg_fatal_error( const char *fmt, ... )
 901 {
 902    va_list args;
 903    va_start( args, fmt );
 904    _vg_logx_va( stderr, NULL, "fatal", KRED, fmt, args );
 905    va_end( args );
 906    exit(0);
 907 }
 908
 909 #endif /* VG_GAME */
 910
 911 /*
 912  * Graphic cards will check these to force it to use the GPU
 913  */
 914 u32 NvOptimusEnablement = 0x00000001;
 915 int AmdPowerXpressRequestHighPerformance = 1;
 916
 917 #include "vg_log.c"
 918
 919 #endif /* VG_HEADER_H */