vg/vg.h

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