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_update(void)
  30 |   | |        |
  31 |   | |  .-----+.
  32 |   | | |        |
  33 |   | | |        v
  34 |IMP| |  '- vg_update_fixed(void)
  35 |   | |          |
  36 |   | |       .-'
  37 |   | |      |
  38 |   | |      v
  39 |IMP| |   vg_update_post(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   #ifndef _WIN32
  61     #include <execinfo.h>
  62   #endif
  63
  64 VG_STATIC void vg_print_backtrace(void)
  65 {
  66 #ifndef _WIN32
  67
  68    void *array[20];
  69    char **strings;
  70    int size, i;
  71
  72    size = backtrace( array, 20 );
  73    strings = backtrace_symbols( array, size );
  74
  75    if( strings != NULL ){
  76       vg_error( "---------------- gnu backtrace -------------\n" );
  77
  78       for( int i=0; i<size; i++ )
  79          vg_info( "%s\n", strings[i] );
  80
  81       vg_error( "---------------- gnu backtrace -------------\n" );
  82    }
  83
  84    free( strings );
  85
  86 #endif
  87 }
  88
  89   #ifdef VG_GAME
  90     #include "dep/glad/glad.h"
  91     #include "dep/sdl/include/SDL.h"
  92     #include "vg_stdint.h"
  93
  94     void vg_register_exit( void( *funcptr )(void), const char *name );
  95
  96     #include "vg_m.h"
  97     #include "vg_io.h"
  98     #include "vg_log.h"
  99     #include "vg_steam.h"
 100
 101   //#define VG_SYNC_DEBUG
 102   #ifdef VG_SYNC_DEBUG
 103     #define VG_SYNC_LOG(STR,...) \
 104        vg_info(STR,SDL_GetThreadID(NULL),##__VA_ARGS__)
 105   #else
 106     #define VG_SYNC_LOG(...)
 107   #endif
 108
 109 /* API */
 110 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name );
 111
 112 /* Thread 1 */
 113 VG_STATIC void vg_preload(void);
 114 VG_STATIC void vg_load(void);
 115
 116 /* Main thread */
 117 VG_STATIC void vg_launch_opt(void);
 118 VG_STATIC void vg_start(void);
 119
 120 VG_STATIC void vg_framebuffer_resize(int w, int h);
 121 VG_STATIC void vg_update(void);
 122 VG_STATIC void vg_update_fixed(void);
 123 VG_STATIC void vg_update_post(void);
 124
 125 VG_STATIC void vg_render(void);
 126 VG_STATIC void vg_gui(void);
 127
 128 struct vg{
 129    /* Engine sync */
 130    SDL_Window     *window;
 131    SDL_GLContext  gl_context;
 132    const char     *base_path;
 133
 134    SDL_sem *sem_loader;        /* allows only one loader at a time */
 135    jmp_buf env_loader_exit;
 136
 137    SDL_threadID  thread_id_main,
 138                  thread_id_loader;
 139    void         *thread_data;
 140
 141    SDL_SpinLock sl_status;
 142    enum engine_status{
 143       k_engine_status_none,
 144       k_engine_status_load_internal,
 145       k_engine_status_running,
 146       k_engine_status_crashed
 147    }
 148    engine_status;
 149
 150    /* Window information */
 151    int window_x,
 152        window_y,
 153        samples,
 154        window_should_close;
 155
 156    int display_refresh_rate,
 157        fps_limit;             /* 0: use vsync, >0: cap fps to this, no vsync */
 158
 159    enum vsync_feature{
 160       k_vsync_feature_disabled=0,
 161       k_vsync_feature_enabled=1,
 162       k_vsync_feature_enabled_adaptive=2,
 163       k_vsync_feature_error=3
 164    }
 165    vsync_feature;
 166
 167    double mouse_pos[2];
 168    v2f mouse_delta,
 169        mouse_wheel;
 170
 171    /* Runtime */
 172    double time,
 173           time_delta,
 174           time_rate,
 175
 176           time_fixed_accumulator,
 177           time_fixed_extrapolate,
 178           time_frame_delta;
 179
 180    u64 time_hp, time_hp_last, time_spinning;
 181
 182    int fixed_iterations;
 183
 184    enum engine_stage{
 185       k_engine_stage_none,
 186       k_engine_stage_update,
 187       k_engine_stage_update_fixed,
 188       k_engine_stage_rendering,
 189       k_engine_stage_ui
 190    }
 191    engine_stage;
 192
 193    /* graphics */
 194    m4x4f pv;
 195    enum quality_profile{
 196       k_quality_profile_high = 0,
 197       k_quality_profile_low = 1,
 198    }
 199    quality_profile;
 200
 201    float loader_ring;
 202 }
 203 VG_STATIC vg = { .time_rate = 1.0 };
 204 const char *vg_get_basepath(void){
 205    return vg.base_path;
 206 }
 207
 208 enum vg_thread_purpose
 209 {
 210    k_thread_purpose_nothing,
 211    k_thread_purpose_main,
 212    k_thread_purpose_loader
 213 };
 214
 215 #include "vg_async.h"
 216
 217 VG_STATIC enum engine_status _vg_engine_status(void)
 218 {
 219    SDL_AtomicLock( &vg.sl_status );
 220    enum engine_status status = vg.engine_status;
 221    SDL_AtomicUnlock( &vg.sl_status );
 222
 223    return status;
 224 }
 225
 226 VG_STATIC enum vg_thread_purpose vg_thread_purpose(void)
 227 {
 228    SDL_AtomicLock( &vg.sl_status );
 229
 230    if( vg.thread_id_main == SDL_GetThreadID(NULL) ){
 231       SDL_AtomicUnlock( &vg.sl_status );
 232       return k_thread_purpose_main;
 233    }
 234    else{
 235       SDL_AtomicUnlock( &vg.sl_status );
 236       return k_thread_purpose_loader;
 237    }
 238 }
 239
 240 VG_STATIC void _vg_opengl_sync_init(void)
 241 {
 242    vg.sem_loader = SDL_CreateSemaphore(1);
 243 }
 244
 245 VG_STATIC void vg_checkgl( const char *src_info );
 246 #define VG_STRINGIT( X ) #X
 247 #define VG_CHECK_GL_ERR() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
 248
 249 #include "vg_console.h"
 250 #include "vg_profiler.h"
 251 #include "vg_audio.h"
 252 #include "vg_shader.h"
 253 #include "vg_tex.h"
 254 #include "vg_input.h"
 255 #include "vg_ui.h"
 256 #include "vg_imgui.h"
 257 #include "vg_lines.h"
 258 #include "vg_loader.h"
 259 #include "vg_opt.h"
 260
 261 /* Diagnostic */
 262 VG_STATIC struct vg_profile vg_prof_update = {.name="update()"},
 263                             vg_prof_render = {.name="render()"},
 264                             vg_prof_swap   = {.name="swap"};
 265
 266 VG_STATIC void vg_checkgl( const char *src_info )
 267 {
 268    int fail = 0;
 269
 270    GLenum err;
 271    while( (err = glGetError()) != GL_NO_ERROR ){
 272       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
 273       fail = 1;
 274    }
 275
 276    if( fail )
 277       vg_fatal_error( "OpenGL Error" );
 278 }
 279
 280 VG_STATIC void async_vg_bake_shaders( void *payload, u32 size )
 281 {
 282    vg_shaders_compile();
 283 }
 284
 285 VG_STATIC void vg_bake_shaders(void)
 286 {
 287    vg_console_reg_cmd( "reload_shaders", vg_shaders_live_recompile, NULL );
 288    vg_async_call( async_vg_bake_shaders, NULL, 0 );
 289 }
 290
 291 void async_internal_complete( void *payload, u32 size )
 292 {
 293    vg_success( "Internal async setup complete\n" );
 294    SDL_AtomicLock( &vg.sl_status );
 295
 296    if( vg.engine_status == k_engine_status_crashed ){
 297       SDL_AtomicUnlock( &vg.sl_status );
 298       return;
 299    }
 300    else{
 301       vg.engine_status = k_engine_status_running;
 302    }
 303
 304    SDL_AtomicUnlock( &vg.sl_status );
 305 }
 306
 307 VG_STATIC void _vg_load_full( void *data )
 308 {
 309    vg_preload();
 310
 311    /* internal */
 312    vg_loader_step( vg_input_init, vg_input_free );
 313    vg_loader_step( vg_lines_init, NULL );
 314    vg_loader_step( vg_audio_init, vg_audio_free );
 315    vg_loader_step( vg_profiler_init, NULL );
 316
 317    vg_async_call( async_internal_complete, NULL, 0 );
 318
 319    /* client */
 320    vg_load();
 321 }
 322
 323 VG_STATIC void _vg_process_events(void)
 324 {
 325    v2_zero( vg.mouse_wheel );
 326    v2_zero( vg.mouse_delta );
 327
 328    /* Update input */
 329    vg_process_inputs();
 330
 331    /* SDL event loop */
 332    SDL_Event event;
 333    while( SDL_PollEvent( &event ) ){
 334       if( event.type == SDL_KEYDOWN ){
 335          if( vg_console.enabled ){
 336             if( event.key.keysym.sym == SDLK_ESCAPE ||
 337                 event.key.keysym.sym == SDLK_BACKQUOTE ){
 338                vg_console.enabled = 0;
 339                ui_defocus_all();
 340             }
 341             else if( (event.key.keysym.mod & KMOD_CTRL) &&
 342                       event.key.keysym.sym == SDLK_n ){
 343                _console_suggest_next();
 344             }
 345             else if( (event.key.keysym.mod & KMOD_CTRL ) &&
 346                       event.key.keysym.sym == SDLK_p ){
 347                _console_suggest_prev();
 348             }
 349             else{
 350                _ui_proc_key( event.key.keysym );
 351             }
 352          }
 353          else{
 354             if( event.key.keysym.sym == SDLK_BACKQUOTE ){
 355                vg_console.enabled = 1;
 356             }
 357             else {
 358                _ui_proc_key( event.key.keysym );
 359             }
 360          }
 361       }
 362       else if( event.type == SDL_MOUSEWHEEL ){
 363          vg.mouse_wheel[0] += event.wheel.preciseX;
 364          vg.mouse_wheel[1] += event.wheel.preciseY;
 365       }
 366       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 367                event.type == SDL_CONTROLLERDEVICEREMOVED )
 368       {
 369          vg_input_device_event( &event );
 370       }
 371       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 372                event.type == SDL_CONTROLLERBUTTONDOWN ||
 373                event.type == SDL_CONTROLLERBUTTONUP )
 374       {
 375          vg_input_controller_event( &event );
 376       }
 377       else if( event.type == SDL_MOUSEMOTION ){
 378          vg.mouse_delta[0] += event.motion.xrel;
 379          vg.mouse_delta[1] += event.motion.yrel;
 380       }
 381       else if( event.type == SDL_WINDOWEVENT ){
 382          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 383             int w, h;
 384             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 385
 386             if( !w || !h ){
 387                vg_warn( "Got a invalid framebuffer size: "
 388                         "%dx%d... ignoring\n", w, h );
 389             }
 390             else{
 391                vg.window_x = w;
 392                vg.window_y = h;
 393
 394                vg_framebuffer_resize(w,h);
 395             }
 396          }
 397          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 398             vg.window_should_close = 1;
 399          }
 400       }
 401       else if( event.type == SDL_TEXTINPUT ){
 402          ui_proc_utf8( event.text.text );
 403       }
 404    }
 405
 406    vg.mouse_pos[0] += vg.mouse_delta[0];
 407    vg.mouse_pos[1] += vg.mouse_delta[1];
 408 }
 409
 410 VG_STATIC void _vg_gameloop_update(void)
 411 {
 412    vg_profile_begin( &vg_prof_update );
 413
 414    vg.engine_stage = k_engine_stage_update;
 415    vg_update();
 416
 417    /* Fixed update loop */
 418    vg.engine_stage = k_engine_stage_update_fixed;
 419
 420    vg.fixed_iterations = 0;
 421    vg_lines.allow_input = 1;
 422    vg.time_fixed_accumulator += vg.time_delta;
 423
 424    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 425       vg_update_fixed();
 426       vg_lines.allow_input = 0;
 427
 428       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 429       //vg.accumulator  = VG_MAX( 0.0, vg.accumulator );
 430
 431       vg.fixed_iterations ++;
 432       if( vg.fixed_iterations == 8 ){
 433          break;
 434       }
 435    }
 436    vg_lines.allow_input = 1;
 437    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 438
 439    vg.engine_stage = k_engine_stage_update;
 440    vg_update_post();
 441    vg_profile_end( &vg_prof_update );
 442 }
 443
 444 VG_STATIC void _vg_gameloop_render(void)
 445 {
 446    vg_profile_begin( &vg_prof_render );
 447
 448    /* render */
 449    vg.engine_stage = k_engine_stage_rendering;
 450    vg_render();
 451
 452    /* ui */
 453    vg.engine_stage = k_engine_stage_ui;
 454    {
 455       ui_prerender();
 456       if( vg_console.enabled ){
 457          vg_ui.ignore_input_frames = 10;
 458          vg_gui();
 459          vg_ui.ignore_input_frames = 0;
 460          vg_ui.wants_mouse = 1;
 461          _vg_console_draw();
 462       }
 463       else vg_gui();
 464
 465       /* vg tools */
 466       audio_debug_ui( vg.pv );
 467
 468       ui_postrender();
 469 #if 0
 470       ui_begin( vg.window_x, vg.window_y );
 471
 472       /* TODO */
 473       ui_set_mouse( vg.mouse_pos[0], vg.mouse_pos[1], 0 );
 474
 475       int frame_target = vg.display_refresh_rate;
 476
 477       if( vg.fps_limit > 0 ){
 478          frame_target = vg.fps_limit;
 479       }
 480
 481       vg_profile_drawn(
 482             (struct vg_profile *[]){
 483                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 484             (1.0f/(float)frame_target)*1000.0f,
 485             (ui_rect){ 4, 4, 250, 0 }, 0
 486       );
 487
 488       if( vg_profiler ){
 489          char perf[256];
 490
 491          snprintf( perf, 255,
 492                "x: %d y: %d\n"
 493                "refresh: %d (%.1fms)\n"
 494                "samples: %d\n"
 495                "iterations: %d (acc: %.3fms%%)\n"
 496                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 497 #ifdef _WIN32
 498                "      extrap(%.2f) frame(%.2f) spin( %llu )\n",
 499 #else
 500                "      extrap(%.2f) frame(%.2f) spin( %lu )\n",
 501 #endif
 502                vg.window_x, vg.window_y,
 503                frame_target, (1.0f/(float)frame_target)*1000.0f,
 504                vg.samples,
 505                vg.fixed_iterations,
 506                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 507                vg.time, vg.time_delta, vg.time_rate,
 508                vg.time_fixed_extrapolate, vg.time_frame_delta,
 509                vg.time_spinning );
 510
 511          ui_text( (ui_rect){258, 4+24+12+12,0,0},perf, 1,0);
 512       }
 513
 514       /* FIXME */
 515       vg_gui();
 516
 517       ui_resolve();
 518       ui_draw( NULL );
 519 #endif
 520    }
 521
 522    vg_profile_end( &vg_prof_render );
 523 }
 524
 525 VG_STATIC int vg_framefilter( double dt )
 526 {
 527    if( (vg.fps_limit <= 0) && (vg.vsync_feature != k_vsync_feature_error) ){
 528       /* turn on vsync if not enabled */
 529
 530       enum vsync_feature requested = k_vsync_feature_enabled;
 531       if( vg.fps_limit < 0 ) requested = k_vsync_feature_enabled_adaptive;
 532
 533       if( vg.vsync_feature != requested ){
 534          vg_info( "Setting swap interval\n" );
 535
 536          int swap_interval = 1;
 537          if( requested == k_vsync_feature_enabled_adaptive ) swap_interval = -1;
 538
 539          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 540             if( requested == k_vsync_feature_enabled ){
 541                vg_error( "Vsync is not supported by your system\n" );
 542                vg_warn( "You may be overriding it in your"
 543                         " graphics control panel.\n" );
 544             }
 545             else{
 546                vg_error( "Adaptive Vsync is not supported by your system\n" );
 547             }
 548
 549             vg.vsync_feature = k_vsync_feature_error;
 550             vg.fps_limit = vg.display_refresh_rate;
 551
 552             /* TODO: Make popup to notify user that this happened */
 553             return 1;
 554          }
 555          else{
 556             vg_success( "Vsync enabled (%d)\n", requested );
 557             vg.vsync_feature = requested;
 558          }
 559       }
 560
 561       return 0;
 562    }
 563
 564    if( vg.vsync_feature != k_vsync_feature_disabled ){
 565       SDL_GL_SetSwapInterval( 0 );
 566       vg.vsync_feature = k_vsync_feature_disabled;
 567    }
 568
 569    if( vg.fps_limit < 25 ) vg.fps_limit = 25;
 570    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 571
 572    double min_frametime = 1.0/(double)vg.fps_limit;
 573    if( vg.time_frame_delta < min_frametime ){
 574       /* TODO: we can use high res nanosleep on Linux here */
 575       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 576       u32 ms = (u32)floor( sleep_ms );
 577
 578       if( ms ){
 579          SDL_Delay( ms );
 580       }
 581       else{
 582          vg.time_spinning ++;
 583       }
 584
 585       return 1;
 586    }
 587
 588    return 0;
 589 }
 590
 591 VG_STATIC int _vg_crashscreen(void)
 592 {
 593 #if 0
 594    if( vg_getkey( SDLK_ESCAPE ) )
 595       return 1;
 596 #endif
 597
 598    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 599    glEnable(GL_BLEND);
 600    glDisable(GL_DEPTH_TEST);
 601    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 602    glBlendEquation(GL_FUNC_ADD);
 603
 604    glClearColor( 0.15f + sinf(vg.time)*0.1f, 0.0f, 0.0f,1.0f );
 605    glClear( GL_COLOR_BUFFER_BIT );
 606    glViewport( 0,0, vg.window_x, vg.window_y );
 607
 608    _vg_render_log();
 609
 610    return 0;
 611 }
 612
 613 VG_STATIC void _vg_gameloop(void)
 614 {
 615    //vg.time_fixed_accumulator = 0.75f * (1.0f/60.0f);
 616
 617    vg.time_hp = SDL_GetPerformanceCounter();
 618    vg.time_hp_last = vg.time_hp;
 619
 620    int post_start = 0;
 621    while(1){
 622
 623       vg.time_hp = SDL_GetPerformanceCounter();
 624       u64 udt = vg.time_hp - vg.time_hp_last;
 625       vg.time_hp_last = vg.time_hp;
 626
 627       double dt = (double)udt / (double)SDL_GetPerformanceFrequency();
 628
 629       vg.time_frame_delta += dt;
 630
 631       if( vg_framefilter( dt ) )
 632          continue;
 633
 634       vg_profile_begin( &vg_prof_swap );
 635       SDL_GL_SwapWindow( vg.window );
 636       vg_profile_end( &vg_prof_swap );
 637
 638       enum engine_status status = _vg_engine_status();
 639
 640       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 641       vg.time += vg.time_delta;
 642
 643       vg_run_async_checked();
 644       _vg_process_events();
 645
 646       if( vg.window_should_close )
 647          break;
 648
 649       if( status == k_engine_status_crashed ){
 650          if( _vg_crashscreen() )
 651             break;
 652       }
 653       else{
 654          if( status == k_engine_status_running ){
 655             _vg_gameloop_update();
 656             _vg_gameloop_render();
 657          }
 658          else{
 659             _vg_loader_render();
 660          }
 661       }
 662
 663       if( vg.loader_ring > 0.01f ){
 664          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 665          _vg_loader_render_ring( vg.loader_ring );
 666       }
 667
 668       vg.time_frame_delta = 0.0;
 669       vg.time_spinning = 0;
 670    }
 671 }
 672
 673 VG_STATIC void _vg_process_launch_opts_internal( int argc, char *argv[] )
 674 {
 675    char *arg;
 676    while( vg_argp( argc, argv ) ){
 677       if( (arg = vg_opt_arg( 'w' )) ){
 678          vg.window_x = atoi( arg );
 679       }
 680
 681       if( (arg = vg_opt_arg( 'h' )) ){
 682          vg.window_y = atoi( arg );
 683       }
 684
 685       if( (arg = vg_long_opt_arg( "samples" )) ){
 686          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 687       }
 688
 689       if(  vg_long_opt( "use-libc-malloc" ) ){
 690          vg_mem.use_libc_malloc = 1;
 691       }
 692
 693       if( vg_long_opt( "high-performance" ) ){
 694          vg.quality_profile = k_quality_profile_low;
 695       }
 696
 697       vg_launch_opt();
 698    }
 699 }
 700
 701 VG_STATIC void _vg_init_window( const char *window_name )
 702 {
 703    vg_info( "SDL_INIT\n" );
 704
 705    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 706       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 707       exit(0);
 708    }
 709
 710    SDL_InitSubSystem( SDL_INIT_AUDIO );
 711    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 712
 713    char *exe_basepath = SDL_GetBasePath();
 714    u32 len = vg_align8( strlen(exe_basepath)+1 );
 715    char *dest  = vg_linear_alloc( vg_mem.rtmemory, len );
 716    strcpy( dest, exe_basepath );
 717    SDL_free( exe_basepath );
 718    vg.base_path = dest;
 719
 720    vg_info( "Basepath: %s\n", vg.base_path );
 721
 722    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 723    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 724    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 725    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 726                            SDL_GL_CONTEXT_PROFILE_CORE );
 727
 728    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 729                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 730
 731    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 732    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 733    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 734    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 735    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 736
 737    /*
 738     * Get monitor information
 739     */
 740    vg_info( "Getting display count\n" );
 741    int display_count = 0,
 742        display_index = 0,
 743        mode_index = 0;
 744
 745 #ifdef VG_DEVWINDOW
 746    vg.window_x = 1600;
 747    vg.window_y = 1000;
 748 #else
 749
 750    SDL_DisplayMode video_mode;
 751    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 752       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 753       SDL_Quit();
 754       exit(0);
 755    }
 756
 757    vg.display_refresh_rate = video_mode.refresh_rate;
 758    vg.window_x = video_mode.w;
 759    vg.window_y = video_mode.h;
 760 #endif
 761
 762 #ifndef _WIN32
 763         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 764         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 765         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 766 #endif
 767
 768    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 769                                              vg.display_refresh_rate );
 770
 771    /* TODO: Allow selecting closest video mode from launch opts */
 772    if((vg.window = SDL_CreateWindow( window_name,
 773
 774 #ifdef VG_DEVWINDOW
 775          0, 0, vg.window_x, vg.window_y,
 776          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL|SDL_WINDOW_INPUT_GRABBED
 777       ))){}
 778 #else
 779                                      0, 0,
 780                                      vg.window_x, vg.window_y,
 781
 782                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 783                                      SDL_WINDOW_OPENGL |
 784                                      SDL_WINDOW_INPUT_GRABBED
 785                                      )))
 786    {
 787       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 788          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 789          SDL_Quit();
 790          exit(0);
 791       }
 792    }
 793 #endif
 794    else{
 795       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 796       exit(0);
 797    }
 798
 799    SDL_RaiseWindow( vg.window );
 800
 801    vg_info( "CreateContext\n" );
 802
 803    /* ????? */
 804    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 805
 806    /*
 807     * OpenGL loading
 808     */
 809    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 810       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 811       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 812    }
 813    else{
 814       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 815       SDL_Quit();
 816       exit(0);
 817    }
 818
 819    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 820       vg_error( "Glad Failed to initialize\n" );
 821       SDL_GL_DeleteContext( vg.gl_context );
 822       SDL_Quit();
 823       exit(0);
 824    }
 825
 826    const unsigned char* glver = glGetString( GL_VERSION );
 827    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 828
 829    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 830
 831    SDL_DisplayMode dispmode;
 832    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 833       if( dispmode.refresh_rate ){
 834          vg.display_refresh_rate = dispmode.refresh_rate;
 835       }
 836    }
 837
 838    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 839       vg.display_refresh_rate = 60;
 840    }
 841
 842    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 843
 844 #if defined(_WIN32) || defined(VG_DEVWINDOW)
 845    vg.fps_limit = vg.display_refresh_rate;
 846 #else
 847    vg.fps_limit = 0;
 848 #endif
 849 }
 850
 851 VG_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 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name )
 870 {
 871    vg_rand_seed( 461 );
 872    _vg_process_launch_opts_internal( argc, argv );
 873
 874    /* Systems init */
 875    vg_alloc_quota();
 876    _vg_console_init();
 877
 878    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 879    _vg_init_window( window_name );
 880
 881    vg_async_init();
 882    SDL_SetRelativeMouseMode(1);
 883
 884    vg.thread_id_main = SDL_GetThreadID(NULL);
 885
 886    /* Opengl-required systems */
 887    _vg_ui_init();
 888    _vg_loader_init();
 889
 890    vg.engine_status = k_engine_status_load_internal;
 891
 892    _vg_opengl_sync_init();
 893     vg_loader_start( _vg_load_full, NULL );
 894    _vg_gameloop();
 895    _vg_terminate();
 896 }
 897
 898 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 899 {
 900    va_list args;
 901    va_start( args, fmt );
 902    _vg_log_write( stderr, KRED "  fatal" KWHT "| " KRED, fmt, args );
 903    va_end( args );
 904
 905    vg_print_backtrace();
 906
 907    SDL_AtomicLock( &vg.sl_status );
 908    vg.engine_status = k_engine_status_crashed;
 909    SDL_AtomicUnlock( &vg.sl_status );
 910
 911    if( vg_thread_purpose() == k_thread_purpose_loader ){
 912       longjmp( vg.env_loader_exit, 1 );
 913    }
 914    else{
 915       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 916       _vg_terminate();
 917    }
 918 }
 919
 920 #else /* VG_GAME */
 921
 922 #include "vg_log.h"
 923 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 924 {
 925    va_list args;
 926    va_start( args, fmt );
 927    _vg_log_write( stderr, KRED "  fatal" KWHT "| " KRED, fmt, args );
 928    va_end( args );
 929    exit(0);
 930 }
 931
 932 #endif /* VG_GAME */
 933
 934 /*
 935  * Graphic cards will check these to force it to use the GPU
 936  */
 937 u32 NvOptimusEnablement = 0x00000001;
 938 int AmdPowerXpressRequestHighPerformance = 1;
 939
 940 #endif /* VG_HEADER_H */