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