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   #include "vg_platform.h"
  56   #include "vg_mem.h"
  57
  58   #ifndef _WIN32
  59     #include <execinfo.h>
  60   #endif
  61
  62 VG_STATIC void vg_print_backtrace(void)
  63 {
  64 #ifndef _WIN32
  65
  66    void *array[20];
  67    char **strings;
  68    int size, i;
  69
  70    size = backtrace( array, 20 );
  71    strings = backtrace_symbols( array, size );
  72
  73    if( strings != NULL ){
  74       vg_error( "---------------- gnu backtrace -------------\n" );
  75
  76       for( int i=0; i<size; i++ )
  77          vg_info( "%s\n", strings[i] );
  78
  79       vg_error( "---------------- gnu backtrace -------------\n" );
  80    }
  81
  82    free( strings );
  83
  84 #endif
  85 }
  86
  87   #ifdef VG_GAME
  88     #include "dep/glad/glad.h"
  89     #include "submodules/SDL/include/SDL.h"
  90     #include "vg_stdint.h"
  91
  92     void vg_register_exit( void( *funcptr )(void), const char *name );
  93
  94     #include "vg_m.h"
  95     #include "vg_io.h"
  96     #include "vg_log.h"
  97     #include "vg_steam.h"
  98     #include <setjmp.h>
  99
 100   //#define VG_SYNC_DEBUG
 101   #ifdef VG_SYNC_DEBUG
 102     #define VG_SYNC_LOG(STR,...) \
 103        vg_info(STR,SDL_GetThreadID(NULL),##__VA_ARGS__)
 104   #else
 105     #define VG_SYNC_LOG(...)
 106   #endif
 107
 108 /* API */
 109 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name );
 110
 111 /* Thread 1 */
 112 VG_STATIC void vg_preload(void);
 113 VG_STATIC void vg_load(void);
 114
 115 /* Main thread */
 116 VG_STATIC void vg_launch_opt(void);
 117 VG_STATIC void vg_start(void);
 118
 119 VG_STATIC void vg_framebuffer_resize(int w, int h);
 120 VG_STATIC void vg_update(void);
 121 VG_STATIC void vg_update_fixed(void);
 122 VG_STATIC void vg_update_post(void);
 123
 124 VG_STATIC void vg_render(void);
 125 VG_STATIC void vg_gui(void);
 126
 127 struct vg
 128 {
 129    /* Engine sync */
 130    SDL_Window     *window;
 131    SDL_GLContext  gl_context;
 132
 133    SDL_sem *sem_loader;        /* allows only one loader at a time */
 134
 135    jmp_buf env_loader_exit;
 136
 137    SDL_threadID  thread_id_main,
 138                  thread_id_loader;
 139
 140    SDL_SpinLock sl_status;
 141    enum engine_status
 142    {
 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    {
 161       k_vsync_feature_disabled=0,
 162       k_vsync_feature_enabled=1,
 163       k_vsync_feature_enabled_adaptive=2,
 164       k_vsync_feature_error=3
 165    }
 166    vsync_feature;
 167
 168    double mouse_pos[2];
 169    v2f mouse_delta,
 170        mouse_wheel;
 171
 172    /* Runtime */
 173    double time,
 174           time_delta,
 175           time_rate,
 176
 177           time_fixed_accumulator,
 178           time_fixed_extrapolate,
 179           time_frame_delta;
 180
 181    u64 time_hp, time_hp_last, time_spinning;
 182
 183    int fixed_iterations;
 184
 185    enum engine_stage
 186    {
 187       k_engine_stage_none,
 188       k_engine_stage_update,
 189       k_engine_stage_update_fixed,
 190       k_engine_stage_rendering,
 191       k_engine_stage_ui
 192    }
 193    engine_stage;
 194
 195    /* graphics */
 196    m4x4f pv;
 197    enum quality_profile
 198    {
 199       k_quality_profile_high = 0,
 200       k_quality_profile_low = 1,
 201    }
 202    quality_profile;
 203
 204    float loader_ring;
 205 }
 206 VG_STATIC vg = { .time_rate = 1.0 };
 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)
 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          //console_proc_key( event.key.keysym );
 336          _ui_proc_key( event.key.keysym );
 337       }
 338       else if( event.type == SDL_MOUSEWHEEL ){
 339          vg.mouse_wheel[0] += event.wheel.preciseX;
 340          vg.mouse_wheel[1] += event.wheel.preciseY;
 341       }
 342       else if( event.type == SDL_CONTROLLERDEVICEADDED ||
 343                event.type == SDL_CONTROLLERDEVICEREMOVED )
 344       {
 345          vg_input_device_event( &event );
 346       }
 347       else if( event.type == SDL_CONTROLLERAXISMOTION ||
 348                event.type == SDL_CONTROLLERBUTTONDOWN ||
 349                event.type == SDL_CONTROLLERBUTTONUP )
 350       {
 351          vg_input_controller_event( &event );
 352       }
 353       else if( event.type == SDL_MOUSEMOTION ){
 354          vg.mouse_delta[0] += event.motion.xrel;
 355          vg.mouse_delta[1] += event.motion.yrel;
 356       }
 357       else if( event.type == SDL_WINDOWEVENT ){
 358          if( event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED ){
 359             int w, h;
 360             SDL_GL_GetDrawableSize( vg.window, &w, &h );
 361
 362             if( !w || !h ){
 363                vg_warn( "Got a invalid framebuffer size: "
 364                         "%dx%d... ignoring\n", w, h );
 365             }
 366             else{
 367                vg.window_x = w;
 368                vg.window_y = h;
 369
 370                vg_framebuffer_resize(w,h);
 371             }
 372          }
 373          else if( event.window.event == SDL_WINDOWEVENT_CLOSE ){
 374             vg.window_should_close = 1;
 375          }
 376       }
 377       else if( event.type == SDL_TEXTINPUT ){
 378          //console_proc_utf8( event.text.text );
 379          ui_proc_utf8( event.text.text );
 380       }
 381    }
 382
 383    vg.mouse_pos[0] += vg.mouse_delta[0];
 384    vg.mouse_pos[1] += vg.mouse_delta[1];
 385 }
 386
 387 VG_STATIC void _vg_gameloop_update(void)
 388 {
 389    vg_profile_begin( &vg_prof_update );
 390
 391    vg.engine_stage = k_engine_stage_update;
 392    vg_update();
 393
 394    /* Fixed update loop */
 395    vg.engine_stage = k_engine_stage_update_fixed;
 396
 397    vg.fixed_iterations = 0;
 398    vg_lines.allow_input = 1;
 399    vg.time_fixed_accumulator += vg.time_delta;
 400
 401    while( vg.time_fixed_accumulator >= VG_TIMESTEP_FIXED ){
 402       vg_update_fixed();
 403       vg_lines.allow_input = 0;
 404
 405       vg.time_fixed_accumulator -= VG_TIMESTEP_FIXED;
 406       //vg.accumulator  = VG_MAX( 0.0, vg.accumulator );
 407
 408       vg.fixed_iterations ++;
 409       if( vg.fixed_iterations == 8 ){
 410          break;
 411       }
 412    }
 413    vg_lines.allow_input = 1;
 414    vg.time_fixed_extrapolate = vg.time_fixed_accumulator / VG_TIMESTEP_FIXED;
 415
 416    vg.engine_stage = k_engine_stage_update;
 417    vg_update_post();
 418    vg_profile_end( &vg_prof_update );
 419 }
 420
 421 VG_STATIC void _vg_gameloop_render(void)
 422 {
 423    vg_profile_begin( &vg_prof_render );
 424
 425    /* render */
 426    vg.engine_stage = k_engine_stage_rendering;
 427    vg_render();
 428
 429    /* ui */
 430    vg.engine_stage = k_engine_stage_ui;
 431    {
 432       ui_prerender();
 433       vg_gui();
 434       ui_postrender();
 435 #if 0
 436       ui_begin( vg.window_x, vg.window_y );
 437
 438       /* TODO */
 439       ui_set_mouse( vg.mouse_pos[0], vg.mouse_pos[1], 0 );
 440
 441       int frame_target = vg.display_refresh_rate;
 442
 443       if( vg.fps_limit > 0 ){
 444          frame_target = vg.fps_limit;
 445       }
 446
 447       vg_profile_drawn(
 448             (struct vg_profile *[]){
 449                &vg_prof_update,&vg_prof_render,&vg_prof_swap}, 3,
 450             (1.0f/(float)frame_target)*1000.0f,
 451             (ui_rect){ 4, 4, 250, 0 }, 0
 452       );
 453
 454       if( vg_profiler ){
 455          char perf[256];
 456
 457          snprintf( perf, 255,
 458                "x: %d y: %d\n"
 459                "refresh: %d (%.1fms)\n"
 460                "samples: %d\n"
 461                "iterations: %d (acc: %.3fms%%)\n"
 462                "time: real(%.2f) delta(%.2f) rate(%.2f)\n"
 463 #ifdef _WIN32
 464                "      extrap(%.2f) frame(%.2f) spin( %llu )\n",
 465 #else
 466                "      extrap(%.2f) frame(%.2f) spin( %lu )\n",
 467 #endif
 468                vg.window_x, vg.window_y,
 469                frame_target, (1.0f/(float)frame_target)*1000.0f,
 470                vg.samples,
 471                vg.fixed_iterations,
 472                (vg.time_fixed_accumulator/VG_TIMESTEP_FIXED)*100.0f,
 473                vg.time, vg.time_delta, vg.time_rate,
 474                vg.time_fixed_extrapolate, vg.time_frame_delta,
 475                vg.time_spinning );
 476
 477          ui_text( (ui_rect){258, 4+24+12+12,0,0},perf, 1,0);
 478       }
 479
 480       /* FIXME */
 481       audio_debug_ui( vg.pv );
 482       vg_gui();
 483       _vg_console_draw();
 484
 485       ui_resolve();
 486       ui_draw( NULL );
 487 #endif
 488    }
 489
 490    vg_profile_end( &vg_prof_render );
 491 }
 492
 493 VG_STATIC int vg_framefilter( double dt )
 494 {
 495    if( (vg.fps_limit <= 0) && (vg.vsync_feature != k_vsync_feature_error) ){
 496       /* turn on vsync if not enabled */
 497
 498       enum vsync_feature requested = k_vsync_feature_enabled;
 499       if( vg.fps_limit < 0 ) requested = k_vsync_feature_enabled_adaptive;
 500
 501       if( vg.vsync_feature != requested ){
 502          vg_info( "Setting swap interval\n" );
 503
 504          int swap_interval = 1;
 505          if( requested == k_vsync_feature_enabled_adaptive ) swap_interval = -1;
 506
 507          if( SDL_GL_SetSwapInterval( swap_interval ) == -1 ){
 508             if( requested == k_vsync_feature_enabled ){
 509                vg_error( "Vsync is not supported by your system\n" );
 510                vg_warn( "You may be overriding it in your"
 511                         " graphics control panel.\n" );
 512             }
 513             else{
 514                vg_error( "Adaptive Vsync is not supported by your system\n" );
 515             }
 516
 517             vg.vsync_feature = k_vsync_feature_error;
 518             vg.fps_limit = vg.display_refresh_rate;
 519
 520             /* TODO: Make popup to notify user that this happened */
 521             return 1;
 522          }
 523          else{
 524             vg_success( "Vsync enabled (%d)\n", requested );
 525             vg.vsync_feature = requested;
 526          }
 527       }
 528
 529       return 0;
 530    }
 531
 532    if( vg.vsync_feature != k_vsync_feature_disabled ){
 533       SDL_GL_SetSwapInterval( 0 );
 534       vg.vsync_feature = k_vsync_feature_disabled;
 535    }
 536
 537    if( vg.fps_limit < 25 ) vg.fps_limit = 25;
 538    if( vg.fps_limit > 300 ) vg.fps_limit = 300;
 539
 540    double min_frametime = 1.0/(double)vg.fps_limit;
 541    if( vg.time_frame_delta < min_frametime ){
 542       /* TODO: we can use high res nanosleep on Linux here */
 543       double sleep_ms = (min_frametime-vg.time_frame_delta) * 1000.0;
 544       u32 ms = (u32)floor( sleep_ms );
 545
 546       if( ms ){
 547          SDL_Delay( ms );
 548       }
 549       else{
 550          vg.time_spinning ++;
 551       }
 552
 553       return 1;
 554    }
 555
 556    return 0;
 557 }
 558
 559 VG_STATIC int _vg_crashscreen(void)
 560 {
 561 #if 0
 562    if( vg_getkey( SDLK_ESCAPE ) )
 563       return 1;
 564 #endif
 565
 566    glBindFramebuffer( GL_FRAMEBUFFER, 0 );
 567    glEnable(GL_BLEND);
 568    glDisable(GL_DEPTH_TEST);
 569    glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
 570    glBlendEquation(GL_FUNC_ADD);
 571
 572    glClearColor( 0.15f + sinf(vg.time)*0.1f, 0.0f, 0.0f,1.0f );
 573    glClear( GL_COLOR_BUFFER_BIT );
 574    glViewport( 0,0, vg.window_x, vg.window_y );
 575
 576    _vg_render_log();
 577
 578    return 0;
 579 }
 580
 581 VG_STATIC void _vg_gameloop(void)
 582 {
 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
 599       if( vg_framefilter( dt ) )
 600          continue;
 601
 602       vg_profile_begin( &vg_prof_swap );
 603       SDL_GL_SwapWindow( vg.window );
 604       vg_profile_end( &vg_prof_swap );
 605
 606       enum engine_status status = _vg_engine_status();
 607
 608       vg.time_delta = vg.time_frame_delta * vg.time_rate;
 609       vg.time += vg.time_delta;
 610
 611       vg_run_async_checked();
 612       _vg_process_events();
 613
 614       if( vg.window_should_close )
 615          break;
 616
 617       if( status == k_engine_status_crashed ){
 618          if( _vg_crashscreen() )
 619             break;
 620       }
 621       else{
 622          if( status == k_engine_status_running ){
 623             _vg_gameloop_update();
 624             _vg_gameloop_render();
 625          }
 626          else{
 627             _vg_loader_render();
 628          }
 629       }
 630
 631       if( vg.loader_ring > 0.01f ){
 632          vg.loader_ring -= vg.time_frame_delta * 0.5f;
 633          _vg_loader_render_ring( vg.loader_ring );
 634       }
 635
 636       vg.time_frame_delta = 0.0;
 637       vg.time_spinning = 0;
 638    }
 639 }
 640
 641 VG_STATIC void _vg_process_launch_opts_internal( int argc, char *argv[] )
 642 {
 643    char *arg;
 644    while( vg_argp( argc, argv ) ){
 645       if( (arg = vg_opt_arg( 'w' )) ){
 646          vg.window_x = atoi( arg );
 647       }
 648
 649       if( (arg = vg_opt_arg( 'h' )) ){
 650          vg.window_y = atoi( arg );
 651       }
 652
 653       if( (arg = vg_long_opt_arg( "samples" )) ){
 654          vg.samples = VG_MAX( 0, VG_MIN( 8, atoi( arg ) ) );
 655       }
 656
 657       if(  vg_long_opt( "use-libc-malloc" ) ){
 658          vg_mem.use_libc_malloc = 1;
 659       }
 660
 661       if( vg_long_opt( "high-performance" ) ){
 662          vg.quality_profile = k_quality_profile_low;
 663       }
 664
 665       vg_launch_opt();
 666    }
 667 }
 668
 669 VG_STATIC void _vg_init_window( const char *window_name )
 670 {
 671    vg_info( "SDL_INIT\n" );
 672
 673    if( SDL_Init( SDL_INIT_VIDEO ) != 0  ){
 674       vg_error( "SDL_Init failed: %s\n", SDL_GetError() );
 675       exit(0);
 676    }
 677
 678    SDL_InitSubSystem( SDL_INIT_AUDIO );
 679    SDL_InitSubSystem( SDL_INIT_GAMECONTROLLER );
 680
 681    SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
 682    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 3 );
 683    SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 3 );
 684    SDL_GL_SetAttribute( SDL_GL_CONTEXT_PROFILE_MASK,
 685                            SDL_GL_CONTEXT_PROFILE_CORE );
 686
 687    SDL_GL_SetAttribute( SDL_GL_CONTEXT_RELEASE_BEHAVIOR,
 688                            SDL_GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH );
 689
 690    SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
 691    SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
 692    SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
 693    SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
 694    SDL_GL_SetAttribute( SDL_GL_STENCIL_SIZE, 0 );
 695
 696    /*
 697     * Get monitor information
 698     */
 699    vg_info( "Getting display count\n" );
 700    int display_count = 0,
 701        display_index = 0,
 702        mode_index = 0;
 703
 704 #ifdef VG_DEVWINDOW
 705    vg.window_x = 1600;
 706    vg.window_y = 1000;
 707 #else
 708
 709    SDL_DisplayMode video_mode;
 710    if( SDL_GetDesktopDisplayMode( display_index, &video_mode ) ){
 711       vg_error( "SDL_GetDesktopDisplayMode failed: %s\n", SDL_GetError() );
 712       SDL_Quit();
 713       exit(0);
 714    }
 715
 716    vg.display_refresh_rate = video_mode.refresh_rate;
 717    vg.window_x = video_mode.w;
 718    vg.window_y = video_mode.h;
 719 #endif
 720
 721 #ifndef _WIN32
 722         SDL_SetHint( "SDL_VIDEO_X11_XINERAMA", "1" );
 723         SDL_SetHint( "SDL_VIDEO_X11_XRANDR", "0" );
 724         SDL_SetHint( "SDL_VIDEO_X11_XVIDMODE", "0" );
 725 #endif
 726
 727    vg_info( "CreateWindow( %d %d @%dhz )\n", vg.window_x, vg.window_y,
 728                                              vg.display_refresh_rate );
 729
 730    /* TODO: Allow selecting closest video mode from launch opts */
 731    if((vg.window = SDL_CreateWindow( window_name,
 732
 733 #ifdef VG_DEVWINDOW
 734          0, 0, vg.window_x, vg.window_y,
 735          SDL_WINDOW_BORDERLESS|SDL_WINDOW_OPENGL
 736       ))){}
 737 #else
 738                                      0, 0,
 739                                      vg.window_x, vg.window_y,
 740
 741                                      SDL_WINDOW_FULLSCREEN_DESKTOP |
 742                                      SDL_WINDOW_OPENGL |
 743                                      SDL_WINDOW_INPUT_GRABBED
 744                                      )))
 745    {
 746       if( SDL_SetWindowDisplayMode( vg.window, &video_mode ) ){
 747          vg_error( "SDL_SetWindowDisplayMode failed: %s", SDL_GetError() );
 748          SDL_Quit();
 749          exit(0);
 750       }
 751    }
 752 #endif
 753    else{
 754       vg_error( "SDL_CreateWindow failed: %s", SDL_GetError() );
 755       exit(0);
 756    }
 757
 758    SDL_RaiseWindow( vg.window );
 759
 760    vg_info( "CreateContext\n" );
 761
 762    /* ????? */
 763    if( SDL_IsTextInputActive() ) SDL_StopTextInput();
 764
 765    /*
 766     * OpenGL loading
 767     */
 768    if( (vg.gl_context = SDL_GL_CreateContext(vg.window) )){
 769       SDL_GL_GetDrawableSize( vg.window, &vg.window_x, &vg.window_y );
 770       vg_success( "Window created (%dx%d)\n", vg.window_x, vg.window_y );
 771    }
 772    else{
 773       vg_error( "SDL_GL_CreateContext failed: %s\n", SDL_GetError() );
 774       SDL_Quit();
 775       exit(0);
 776    }
 777
 778    if( !gladLoadGLLoader((GLADloadproc)SDL_GL_GetProcAddress) ) {
 779       vg_error( "Glad Failed to initialize\n" );
 780       SDL_GL_DeleteContext( vg.gl_context );
 781       SDL_Quit();
 782       exit(0);
 783    }
 784
 785    const unsigned char* glver = glGetString( GL_VERSION );
 786    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 787
 788    SDL_GL_SetSwapInterval(0); /* disable vsync while loading */
 789
 790    SDL_DisplayMode dispmode;
 791    if( !SDL_GetWindowDisplayMode( vg.window, &dispmode ) ){
 792       if( dispmode.refresh_rate ){
 793          vg.display_refresh_rate = dispmode.refresh_rate;
 794       }
 795    }
 796
 797    if( vg.display_refresh_rate < 25 || vg.display_refresh_rate > 300 ){
 798       vg.display_refresh_rate = 60;
 799    }
 800
 801    vg_info( "Display refresh rate: %d\n", dispmode.refresh_rate );
 802
 803 #ifdef _WIN32
 804    vg.fps_limit = vg.display_refresh_rate;
 805 #else
 806    /* request vsync by default on linux to avoid screen tearing.
 807     * this does have its own issues with compositing on X11. */
 808    vg.fps_limit = 0;
 809 #endif
 810 }
 811
 812 VG_STATIC void _vg_terminate(void)
 813 {
 814    /* Shutdown */
 815    _vg_console_write_persistent();
 816
 817    SDL_AtomicLock( &vg.sl_status );
 818    vg.engine_status = k_engine_status_none;
 819    SDL_AtomicUnlock( &vg.sl_status );
 820
 821    _vg_loader_free();
 822
 823    vg_success( "If you see this it means everything went.. \"well\".....\n" );
 824
 825    SDL_GL_DeleteContext( vg.gl_context );
 826    SDL_Quit();
 827    exit(0);
 828 }
 829
 830 VG_STATIC void vg_enter( int argc, char *argv[], const char *window_name )
 831 {
 832    _vg_process_launch_opts_internal( argc, argv );
 833
 834    /* Systems init */
 835    vg_alloc_quota();
 836    _vg_console_init();
 837
 838    vg_console_reg_var( "fps_limit", &vg.fps_limit, k_var_dtype_i32, 0 );
 839    _vg_init_window( window_name );
 840
 841    vg_async_init();
 842
 843 #ifndef VG_DEVWINDOW
 844    SDL_SetRelativeMouseMode(1);
 845 #endif
 846
 847    vg.thread_id_main = SDL_GetThreadID(NULL);
 848
 849    /* Opengl-required systems */
 850    _vg_ui_init();
 851    _vg_loader_init();
 852
 853    vg.engine_status = k_engine_status_load_internal;
 854
 855    _vg_opengl_sync_init();
 856     vg_loader_start( _vg_load_full );
 857    _vg_gameloop();
 858    _vg_terminate();
 859 }
 860
 861 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 862 {
 863    va_list args;
 864    va_start( args, fmt );
 865    _vg_log_write( stderr, KRED "  fatal" KWHT "| " KRED, fmt, args );
 866    va_end( args );
 867
 868    vg_print_backtrace();
 869
 870    SDL_AtomicLock( &vg.sl_status );
 871    vg.engine_status = k_engine_status_crashed;
 872    SDL_AtomicUnlock( &vg.sl_status );
 873
 874    if( vg_thread_purpose() == k_thread_purpose_loader ){
 875       longjmp( vg.env_loader_exit, 1 );
 876    }
 877    else{
 878       vg_error( "There is no jump to the error runner thing yet! bai bai\n" );
 879       _vg_terminate();
 880    }
 881 }
 882
 883 #else /* VG_GAME */
 884
 885 #include "vg_log.h"
 886 VG_STATIC void vg_fatal_error( const char *fmt, ... )
 887 {
 888    va_list args;
 889    va_start( args, fmt );
 890    _vg_log_write( stderr, KRED "  fatal" KWHT "| " KRED, fmt, args );
 891    va_end( args );
 892    exit(0);
 893 }
 894
 895 #endif /* VG_GAME */
 896
 897 /*
 898  * Graphic cards will check these to force it to use the GPU
 899  */
 900 u32 NvOptimusEnablement = 0x00000001;
 901 int AmdPowerXpressRequestHighPerformance = 1;
 902
 903 #endif /* VG_HEADER_H */