src/vg/vg.h

   1 /* Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved */
   2
   3 static void vg_exiterr( const char *err );
   4 static void vg_exit(void);
   5
   6 #ifndef VG_HEADER_H
   7 #define VG_HEADER_H
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <dirent.h>
  12 #include <string.h>
  13 #include <stdarg.h>
  14 #include <ctype.h>
  15 #include <math.h>
  16
  17 #if defined(VG_SERVER) || defined(VG_TOOLS)
  18  #define VG_NON_CLIENT
  19 #endif
  20
  21 #ifndef VG_SERVER
  22 #include "../../dep/glad/glad.h"
  23 #include "../../dep/glfw/glfw3.h"
  24 #endif
  25
  26 #define STB_DS_IMPLEMENTATION
  27 #include "stb/stb_ds.h"
  28
  29 #define QOI_IMPLEMENTATION
  30 #include "phoboslab/qoi.h"
  31
  32 #include "vg_stdint.h"
  33 #include "vg_platform.h"
  34
  35 void vg_register_exit( void( *funcptr )(void), const char *name );
  36
  37 #include "vg_m.h"
  38 #include "vg_io.h"
  39
  40 #ifdef VG_STEAM
  41 //#include "vg_steamworks.h"
  42 #include "vg_steam.h"
  43 #endif
  44
  45 #ifndef VG_NON_CLIENT
  46 #include "vg_gldiag.h"
  47 #endif
  48
  49 #ifndef VG_NON_CLIENT
  50
  51 /* Engine globals */
  52 GLFWwindow* vg_window;
  53
  54 #ifdef VG_3D
  55  m4x4f vg_pv;
  56 #else
  57  m3x3f vg_pv;
  58 #endif
  59
  60 #ifdef VG_CAPTURE_MODE
  61 int vg_window_x = 1920;
  62 int vg_window_y = 1080;
  63 #else
  64 int vg_window_x = 1366;
  65 int vg_window_y = 768;
  66 #endif
  67
  68 v2f vg_mouse;
  69 v2f vg_mouse_wheel;
  70 v3f vg_mouse_ws;
  71
  72 double vg_time,
  73        vg_time_last,
  74        vg_time_delta;
  75
  76 #include "vg_audio.h"
  77 #include "vg_shader.h"
  78 #include "vg_tex.h"
  79 #include "vg_input.h"
  80 #include "vg_ui.h"
  81 #include "vg_console.h"
  82 #include "vg_lines.h"
  83 #include "vg_debug.h"
  84
  85 #ifndef VG_RELEASE
  86 void vg_checkgl( const char *src_info )
  87 {
  88    GLenum err;
  89    while( (err = glGetError()) != GL_NO_ERROR )
  90    {
  91       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
  92    }
  93 }
  94
  95  #define VG_STRINGIT( X ) #X
  96  #define VG_CHECK_GL() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
  97 #else
  98  #define VG_CHECK_GL()
  99 #endif
 100
 101
 102 #define VG_GAMELOOP
 103
 104 void( *vg_on_exit[16] )(void);
 105 u32 vg_exit_count = 0;
 106
 107 void vg_register_exit( void( *funcptr )(void), const char *name )
 108 {
 109    vg_info( "exit registered: (%u)'%s'\n", vg_exit_count, name );
 110    vg_on_exit[ vg_exit_count ++ ] = funcptr;
 111 }
 112
 113 static void vg_exit(void)
 114 {
 115    for( int i = vg_exit_count-1; i >= 0; i -- )
 116    {
 117       vg_info( "engine_exit[%d]()\n", i );
 118       vg_on_exit[i]();
 119    }
 120
 121    vg_info( "done\n" );
 122    exit(0);
 123 }
 124
 125 static void vg_exiterr( const char *err )
 126 {
 127    vg_error( "Engine Fatal: %s\n", err );
 128    vg_exit();
 129 }
 130
 131 void vg_mouse_callback( GLFWwindow* ptrW, double xpos, double ypos )
 132 {
 133    vg_mouse[0] = xpos;
 134    vg_mouse[1] = ypos;
 135 }
 136
 137 void vg_scroll_callback( GLFWwindow* ptrW, double xoffset, double yoffset )
 138 {
 139    vg_mouse_wheel[0] += xoffset;
 140    vg_mouse_wheel[1] += yoffset;
 141 }
 142
 143
 144 static void vg_register(void) VG_GAMELOOP;
 145 static void vg_start(void) VG_GAMELOOP;
 146 static void vg_update(void) VG_GAMELOOP;
 147 static void vg_framebuffer_resize(int w, int h) VG_GAMELOOP;
 148 static void vg_render(void) VG_GAMELOOP;
 149 static void vg_ui(void) VG_GAMELOOP;
 150 static void vg_free(void) VG_GAMELOOP;
 151
 152 void vg_framebuffer_resize_callback( GLFWwindow *ptrW, int w, int h )
 153 {
 154    vg_window_x = w;
 155    vg_window_y = h;
 156
 157 #ifdef VG_FRAMEBUFFER_RESIZE
 158    vg_framebuffer_resize(w,h);
 159 #endif
 160 }
 161
 162 static void vg_init( int argc, char *argv[], const char *window_name )
 163 {
 164 #ifdef VG_STEAM
 165    if( !sw_init() )
 166       return;
 167 #endif
 168
 169    glfwInit();
 170    glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
 171    glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
 172    glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
 173    glfwWindowHint( GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE );
 174
 175 #ifdef VG_CAPTURE_MODE
 176    glfwWindowHint( GLFW_RESIZABLE, GLFW_FALSE );
 177 #else
 178    glfwWindowHint( GLFW_RESIZABLE, GLFW_TRUE );
 179 #endif
 180    glfwWindowHint(GLFW_DOUBLEBUFFER, GLFW_TRUE);
 181
 182 #if 0
 183    glfwWindowHint(GLFW_SAMPLES,4);
 184 #endif
 185
 186    GLFWmonitor *monitor_primary = glfwGetPrimaryMonitor();
 187
 188    const GLFWvidmode *mode = glfwGetVideoMode( monitor_primary );
 189    glfwWindowHint( GLFW_RED_BITS, mode->redBits );
 190    glfwWindowHint( GLFW_GREEN_BITS, mode->greenBits );
 191    glfwWindowHint( GLFW_BLUE_BITS, mode->blueBits );
 192
 193    int refresh_rate = mode->refreshRate;
 194
 195    if( refresh_rate < 28 || refresh_rate >= 144 )
 196       refresh_rate = 60;
 197
 198    glfwWindowHint( GLFW_REFRESH_RATE, refresh_rate );
 199
 200    if( !(vg_window = glfwCreateWindow( vg_window_x, vg_window_y,
 201                                        window_name, NULL, NULL)) )
 202       vg_exiterr( "GLFW Failed to initialize" );
 203    else
 204       vg_register_exit( &glfwTerminate, "glfwTerminate" );
 205
 206    glfwMakeContextCurrent( vg_window );
 207    glfwSwapInterval( 1 );
 208
 209    glfwSetWindowSizeLimits( vg_window, 800, 600, GLFW_DONT_CARE,GLFW_DONT_CARE);
 210    glfwSetFramebufferSizeCallback( vg_window, vg_framebuffer_resize_callback );
 211
 212    glfwSetCursorPosCallback( vg_window, vg_mouse_callback );
 213    glfwSetScrollCallback( vg_window, vg_scroll_callback );
 214
 215    glfwSetCharCallback( vg_window, console_proc_wchar );
 216    glfwSetKeyCallback( vg_window, console_proc_key );
 217 #if 0
 218    glfwSetInputMode(vg_window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
 219 #endif
 220
 221    if( !gladLoadGLLoader((GLADloadproc)glfwGetProcAddress) )
 222       vg_exiterr( "Glad failed to initialize" );
 223
 224    const unsigned char* glver = glGetString( GL_VERSION );
 225    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 226
 227    vg_run_gfx_diagnostics();
 228
 229    vg_gamepad_init();
 230    vg_lines_init();
 231    vg_register_exit( &vg_lines_free, "vg_lines_free" );
 232    ui_default_init();
 233    vg_register_exit( &ui_default_free, "UI" );
 234
 235    vg_register();
 236    vg_register_exit( &vg_free, "vg_free" );
 237
 238
 239    vg_shaders_recompile(0,NULL);
 240    vg_register_exit( &vg_shaders_free, "vg_shaders_free" );
 241         vg_function_push( (struct vg_cmd){
 242                 .name = "shaders",
 243                 .function = vg_shaders_recompile
 244         });
 245
 246    if( !vg_audio_init() )
 247       vg_exit();
 248    vg_register_exit( &vg_audio_free, "vg_audio_free" );
 249
 250    vg_start();
 251
 252    vg_console_init();
 253    vg_register_exit( &vg_console_free, "Console" );
 254
 255    /*
 256     * Main gameloop
 257     */
 258    while( !glfwWindowShouldClose( vg_window ) )
 259    {
 260       v2_copy( (v2f){ 0.0f, 0.0f }, vg_mouse_wheel );
 261
 262       glfwPollEvents();
 263
 264       #ifdef VG_STEAM
 265       sw_event_loop();
 266       #endif
 267
 268       vg_time_last = vg_time;
 269       vg_time = glfwGetTime();
 270       vg_time_delta = vg_minf( vg_time - vg_time_last, 0.1f );
 271
 272       vg_update_inputs();
 273       vg_update();
 274       vg_render();
 275
 276       vg_lines_drawall((float*)vg_pv);
 277
 278       {
 279          ui_begin( &ui_global_ctx, vg_window_x, vg_window_y );
 280          ui_set_mouse( &ui_global_ctx, vg_mouse[0], vg_mouse[1],
 281                vg_get_button_state( "primary" ) );
 282
 283          audio_debug_ui( vg_pv );
 284          vg_ui();
 285          vg_console_draw();
 286
 287          ui_resolve( &ui_global_ctx );
 288          ui_draw( &ui_global_ctx, NULL );
 289       }
 290
 291       glfwSwapBuffers( vg_window );
 292       VG_CHECK_GL();
 293    }
 294
 295    vg_exit();
 296 }
 297
 298 #ifndef VG_3D
 299 void vg_projection_update(void)
 300 {
 301    /*
 302     * Reproject screenspace mouse into world
 303     */
 304
 305    vg_mouse_ws[0] = vg_mouse[0];
 306    vg_mouse_ws[1] = vg_mouse[1];
 307    vg_mouse_ws[2] = 1.0f;
 308
 309    vg_mouse_ws[0] =   (2.0f * vg_mouse_ws[0]) / ((float)vg_window_x) - 1.0f;
 310    vg_mouse_ws[1] = -((2.0f * vg_mouse_ws[1]) / ((float)vg_window_y) - 1.0f);
 311
 312    m3x3f inverse;
 313    m3x3_inv( vg_pv, inverse );
 314    m3x3_mulv( inverse, vg_mouse_ws, vg_mouse_ws );
 315 }
 316 #endif
 317
 318 #endif
 319
 320 /*
 321  * Graphic cards will check these to force it to use the GPU
 322  */
 323 u32 NvOptimusEnablement = 0x00000001;
 324 int AmdPowerXpressRequestHighPerformance = 1;
 325
 326 #endif