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