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
  10 #include "gl/glad/glad.h"
  11 #include "gl/glfw3.h"
  12
  13 #define STB_DS_IMPLEMENTATION
  14 #define STB_IMAGE_IMPLEMENTATION
  15 #include "stb/stb_ds.h"
  16 #include "stb/stb_image.h"
  17
  18 #include "vg/vg_platform.h"
  19
  20 void vg_register_exit( void( *funcptr )(void), const char *name );
  21 void vg_exiterr( const char *strErr );
  22
  23 m3x3f vg_pv;
  24
  25 #include "vg/vg_m.h"
  26 #include "vg/vg_io.h"
  27 #include "vg/vg_gldiag.h"
  28
  29 #ifndef VG_TOOLS
  30
  31 // Engine globals
  32 GLFWwindow* vg_window;
  33 int vg_window_x = 1280;
  34 int vg_window_y = 720;
  35
  36 v2f vg_mouse;
  37 v3f vg_mouse_ws;
  38
  39 float   vg_time;
  40 float   vg_time_last;
  41 float   vg_time_delta;
  42
  43 // Engine components
  44 #include "vg/vg_audio.h"
  45 #include "vg/vg_shader.h"
  46 #include "vg/vg_lines.h"
  47 #include "vg/vg_tex.h"
  48 #include "vg/vg_input.h"
  49 #include "vg/vg_ui.h"
  50 #include "vg/vg_debug.h"
  51
  52 #include "steam/steamworks_thin.h"
  53
  54 // Engine main
  55 // ===========================================================================================================
  56
  57 #ifndef VG_RELEASE
  58 void vg_checkgl( const char *src_info )
  59 {
  60         GLenum err;
  61         while( (err = glGetError()) != GL_NO_ERROR )
  62         {
  63                 vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
  64         }
  65 }
  66
  67  #define VG_STRINGIT( X ) #X
  68  #define VG_CHECK_GL() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
  69 #else
  70  #define VG_CHECK_GL()
  71 #endif
  72
  73
  74 #define VG_GAMELOOP
  75
  76 void( *vg_on_exit[16] )(void);
  77 u32 vg_exit_count = 0;
  78
  79 // Add a shutdown step
  80 void vg_register_exit( void( *funcptr )(void), const char *name )
  81 {
  82         vg_info( "exit registered: (%u)'%s'\n", vg_exit_count, name );
  83         vg_on_exit[ vg_exit_count ++ ] = funcptr;
  84 }
  85
  86 void vg_exit(void)
  87 {
  88         for( int i = vg_exit_count-1; i >= 0; i -- )
  89         {
  90                 vg_info( "engine_exit[%d]()\n", i );
  91                 vg_on_exit[i]();
  92         }
  93
  94         vg_info( "done\n" );
  95 }
  96
  97 // Forcefully exit program after error
  98 void vg_exiterr( const char *strErr )
  99 {
 100         vg_error( "Engine Fatal: %s\n", strErr );
 101         vg_exit();
 102         exit(0);
 103 }
 104
 105 // Callbacks
 106 // ---------
 107
 108 void vg_mouse_callback( GLFWwindow* ptrW, double xpos, double ypos )
 109 {
 110         vg_mouse[0] = xpos;
 111         vg_mouse[1] = ypos;
 112 }
 113
 114 void vg_scroll_callback( GLFWwindow* ptrW, double xoffset, double yoffset )
 115 {
 116
 117 }
 118
 119 void vg_framebuffer_resize_callback( GLFWwindow *ptrW, int w, int h )
 120 {
 121         vg_window_x = w;
 122         vg_window_y = h;
 123 }
 124
 125 static void vg_register(void) VG_GAMELOOP;
 126 static void vg_start(void) VG_GAMELOOP;
 127 static void vg_update(void) VG_GAMELOOP;
 128 static void vg_render(void) VG_GAMELOOP;
 129 static void vg_ui(void) VG_GAMELOOP;
 130 static void vg_free(void) VG_GAMELOOP;
 131
 132 static void vg_init( int argc, char *argv[], const char *window_name )
 133 {
 134 #ifdef VG_STEAM
 135         // Initialize steamworks
 136         if( !sw_init( 1218140U ) )
 137         {
 138                 vg_exiterr( "Steamworks failed to initialize" );
 139         }
 140         else
 141         {
 142                 vg_register_exit( &sw_SteamAPI_Shutdown, "SteamAPI" );
 143         }
 144 #endif
 145
 146         // Context creation
 147         // ==========================================================================================================================
 148         glfwInit();
 149         glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
 150         glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
 151         glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
 152         glfwWindowHint( GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE );
 153
 154         glfwWindowHint( GLFW_SAMPLES, 4 );
 155
 156         GLFWmonitor *monitor_primary = glfwGetPrimaryMonitor();
 157
 158         const GLFWvidmode *mode = glfwGetVideoMode( monitor_primary );
 159         glfwWindowHint( GLFW_RED_BITS, mode->redBits );
 160         glfwWindowHint( GLFW_GREEN_BITS, mode->greenBits );
 161         glfwWindowHint( GLFW_BLUE_BITS, mode->blueBits );
 162         glfwWindowHint( GLFW_REFRESH_RATE, mode->refreshRate );
 163
 164         if( !(vg_window = glfwCreateWindow( vg_window_x, vg_window_y, window_name, NULL, NULL)) )
 165         {
 166                 vg_exiterr( "GLFW Failed to initialize" );
 167         }
 168         else
 169         {
 170                 vg_register_exit( &glfwTerminate, "glfwTerminate" );
 171         }
 172
 173         glfwMakeContextCurrent( vg_window );
 174         glfwSwapInterval( 1 );
 175
 176         // Set callbacks
 177         glfwSetFramebufferSizeCallback( vg_window, vg_framebuffer_resize_callback );
 178
 179         glfwSetCursorPosCallback( vg_window, vg_mouse_callback );
 180         glfwSetScrollCallback( vg_window, vg_scroll_callback );
 181
 182         //glfwSetCharCallback( vg_window, console_proc_wchar );
 183         //glfwSetKeyCallback( vg_window, console_proc_key );
 184         //glfwSetInputMode(vg_window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
 185
 186         if( !gladLoadGLLoader((GLADloadproc)glfwGetProcAddress) )
 187         {
 188                 vg_exiterr( "Glad failed to initialize" );
 189         }
 190
 191         const unsigned char* glver = glGetString( GL_VERSION );
 192         vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 193
 194         vg_run_gfx_diagnostics();
 195
 196         for( int id = 0; id <= GLFW_JOYSTICK_LAST; id ++ )
 197         {
 198                 if( glfwJoystickIsGamepad( id ) )
 199                 {
 200                         vg_gamepad_name = glfwGetGamepadName( id );
 201                         vg_success( "Gamepad with mapping registered: %s\n", vg_gamepad_name );
 202
 203                         vg_gamepad_ready = 1;
 204                         vg_gamepad_id = id;
 205
 206                         break;
 207                 }
 208         }
 209
 210         vg_lines_init();
 211         vg_register_exit( &vg_lines_free, "vg_lines_free" );
 212         ui_default_init();
 213         vg_register_exit( &ui_default_free, "UI" );
 214
 215         vg_register();
 216         vg_register_exit( &vg_free, "vg_free" );
 217
 218         if( vg_shaders_compile() )
 219         {
 220                 vg_start();
 221
 222                 vg_audio_init();
 223                 vg_register_exit( &vg_audio_free, "vg_audio_free" );
 224
 225                 // Main gameloop
 226                 while( !glfwWindowShouldClose( vg_window ) )
 227                 {
 228                         glfwPollEvents();
 229
 230                         #ifdef VG_STEAM
 231                         sw_RunSteamEventLoop();
 232                         #endif
 233
 234                         vg_time_last = vg_time;
 235                         vg_time = glfwGetTime();
 236                         vg_time_delta = vg_min( vg_time - vg_time_last, 0.1f );
 237
 238                         vg_update_inputs();
 239                         vg_update();
 240                         vg_render();
 241
 242                         vg_lines_drawall((float*)vg_pv);
 243
 244                         vg_ui();
 245
 246                         glfwSwapBuffers( vg_window );
 247
 248                         VG_CHECK_GL();
 249                 }
 250         }
 251
 252         vg_exit();
 253 }
 254
 255 // Screen projections
 256 // ============================================================================================
 257
 258 void vg_projection_update(void)
 259 {
 260         // Do transform local->world
 261         vg_mouse_ws[0] = vg_mouse[0];
 262         vg_mouse_ws[1] = vg_mouse[1];
 263         vg_mouse_ws[2] = 1.0f;
 264
 265         vg_mouse_ws[0] =   (2.0f * vg_mouse_ws[0]) / ((float)vg_window_x) - 1.0f;
 266         vg_mouse_ws[1] = -((2.0f * vg_mouse_ws[1]) / ((float)vg_window_y) - 1.0f);
 267
 268         m3x3f inverse;
 269         m3x3_inv( vg_pv, inverse );
 270         m3x3_mulv( inverse, vg_mouse_ws, vg_mouse_ws );
 271 }
 272
 273 #endif
 274
 275 u32 NvOptimusEnablement = 0x00000001;
 276 int AmdPowerXpressRequestHighPerformance = 1;