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