src/vg/vg.h

   1 // Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
   2
   3 // TODO: replace as much of this as possible
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <stdint.h>
   7 #include <string.h>
   8 #include <stdarg.h>
   9 #include <math.h>
  10
  11 #include "glad/glad.h"
  12 #include "glfw/glfw3.h"
  13
  14 #define STB_DS_IMPLEMENTATION
  15 #include "stb/stb_ds.h"
  16
  17 #define QOI_IMPLEMENTATION
  18 #include "phoboslab/qoi.h"
  19
  20 #include "vg/vg_platform.h"
  21
  22 void vg_register_exit( void( *funcptr )(void), const char *name );
  23 void vg_exiterr( const char *strErr );
  24
  25 m3x3f vg_pv;
  26
  27 #include "vg/vg_m.h"
  28 #include "vg/vg_io.h"
  29 #include "vg/vg_gldiag.h"
  30
  31 #ifndef VG_TOOLS
  32
  33 // Engine globals
  34 GLFWwindow* vg_window;
  35
  36 // 1366, 768
  37 // 1920, 1080
  38
  39 #ifdef VG_CAPTURE_MODE
  40 int vg_window_x = 1920;
  41 int vg_window_y = 1080;
  42 #else
  43 int vg_window_x = 1366;
  44 int vg_window_y = 768;
  45 #endif
  46
  47 v2f vg_mouse;
  48 v2f vg_mouse_wheel;
  49 v3f vg_mouse_ws;
  50
  51 float   vg_time;
  52 float   vg_time_last;
  53 float   vg_time_delta;
  54
  55 // Engine components
  56 #include "vg/vg_audio.h"
  57 #include "vg/vg_shader.h"
  58 #include "vg/vg_lines.h"
  59 #include "vg/vg_tex.h"
  60 #include "vg/vg_input.h"
  61 #include "vg/vg_ui.h"
  62 #include "vg/vg_console.h"
  63 #include "vg/vg_debug.h"
  64 #include "vg/vg_steamworks.h"
  65
  66 // Engine main
  67 // ===========================================================================================================
  68
  69 #ifndef VG_RELEASE
  70 void vg_checkgl( const char *src_info )
  71 {
  72         GLenum err;
  73         while( (err = glGetError()) != GL_NO_ERROR )
  74         {
  75                 vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
  76         }
  77 }
  78
  79  #define VG_STRINGIT( X ) #X
  80  #define VG_CHECK_GL() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
  81 #else
  82  #define VG_CHECK_GL()
  83 #endif
  84
  85
  86 #define VG_GAMELOOP
  87
  88 void( *vg_on_exit[16] )(void);
  89 u32 vg_exit_count = 0;
  90
  91 // Add a shutdown step
  92 void vg_register_exit( void( *funcptr )(void), const char *name )
  93 {
  94         vg_info( "exit registered: (%u)'%s'\n", vg_exit_count, name );
  95         vg_on_exit[ vg_exit_count ++ ] = funcptr;
  96 }
  97
  98 void vg_exit(void)
  99 {
 100         for( int i = vg_exit_count-1; i >= 0; i -- )
 101         {
 102                 vg_info( "engine_exit[%d]()\n", i );
 103                 vg_on_exit[i]();
 104         }
 105
 106         vg_info( "done\n" );
 107 }
 108
 109 // Forcefully exit program after error
 110 void vg_exiterr( const char *strErr )
 111 {
 112         vg_error( "Engine Fatal: %s\n", strErr );
 113         vg_exit();
 114         exit(0);
 115 }
 116
 117 // Callbacks
 118 // ---------
 119
 120 void vg_mouse_callback( GLFWwindow* ptrW, double xpos, double ypos )
 121 {
 122         vg_mouse[0] = xpos;
 123         vg_mouse[1] = ypos;
 124 }
 125
 126 void vg_scroll_callback( GLFWwindow* ptrW, double xoffset, double yoffset )
 127 {
 128         vg_mouse_wheel[0] += xoffset;
 129         vg_mouse_wheel[1] += yoffset;
 130 }
 131
 132 void vg_framebuffer_resize_callback( GLFWwindow *ptrW, int w, int h )
 133 {
 134         vg_window_x = w;
 135         vg_window_y = h;
 136 }
 137
 138 static void vg_register(void) VG_GAMELOOP;
 139 static void vg_start(void) VG_GAMELOOP;
 140 static void vg_update(void) VG_GAMELOOP;
 141 static void vg_render(void) VG_GAMELOOP;
 142 static void vg_ui(void) VG_GAMELOOP;
 143 static void vg_free(void) VG_GAMELOOP;
 144
 145 static void vg_init( int argc, char *argv[], const char *window_name )
 146 {
 147         // Initialize steamworks
 148         if( !sw_init() )
 149                 return;
 150
 151         // Context creation
 152         // ==========================================================================================================================
 153         glfwInit();
 154         glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
 155         glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
 156         glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
 157         glfwWindowHint( GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE );
 158
 159 #ifdef VG_CAPTURE_MODE
 160         glfwWindowHint( GLFW_RESIZABLE, GLFW_FALSE );
 161 #else
 162         glfwWindowHint( GLFW_RESIZABLE, GLFW_TRUE );
 163 #endif
 164
 165         glfwWindowHint( GLFW_SAMPLES, 4 );
 166
 167         GLFWmonitor *monitor_primary = glfwGetPrimaryMonitor();
 168
 169         const GLFWvidmode *mode = glfwGetVideoMode( monitor_primary );
 170         glfwWindowHint( GLFW_RED_BITS, mode->redBits );
 171         glfwWindowHint( GLFW_GREEN_BITS, mode->greenBits );
 172         glfwWindowHint( GLFW_BLUE_BITS, mode->blueBits );
 173         glfwWindowHint( GLFW_REFRESH_RATE, mode->refreshRate );
 174
 175         if( !(vg_window = glfwCreateWindow( vg_window_x, vg_window_y, window_name, NULL, NULL)) )
 176         {
 177                 vg_exiterr( "GLFW Failed to initialize" );
 178         }
 179         else
 180         {
 181                 vg_register_exit( &glfwTerminate, "glfwTerminate" );
 182         }
 183
 184         glfwMakeContextCurrent( vg_window );
 185         glfwSwapInterval( 1 );
 186
 187         // Set callbacks
 188         glfwSetFramebufferSizeCallback( vg_window, vg_framebuffer_resize_callback );
 189
 190         glfwSetCursorPosCallback( vg_window, vg_mouse_callback );
 191         glfwSetScrollCallback( vg_window, vg_scroll_callback );
 192
 193         glfwSetCharCallback( vg_window, console_proc_wchar );
 194         glfwSetKeyCallback( vg_window, console_proc_key );
 195         //glfwSetInputMode(vg_window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
 196
 197         if( !gladLoadGLLoader((GLADloadproc)glfwGetProcAddress) )
 198         {
 199                 vg_exiterr( "Glad failed to initialize" );
 200         }
 201
 202         const unsigned char* glver = glGetString( GL_VERSION );
 203         vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 204
 205         vg_run_gfx_diagnostics();
 206
 207         for( int id = 0; id <= GLFW_JOYSTICK_LAST; id ++ )
 208         {
 209                 if( glfwJoystickIsGamepad( id ) )
 210                 {
 211                         vg_gamepad_name = glfwGetGamepadName( id );
 212                         vg_success( "Gamepad with mapping registered: %s\n", vg_gamepad_name );
 213
 214                         vg_gamepad_ready = 1;
 215                         vg_gamepad_id = id;
 216
 217                         break;
 218                 }
 219         }
 220
 221         vg_lines_init();
 222         vg_register_exit( &vg_lines_free, "vg_lines_free" );
 223         ui_default_init();
 224         vg_register_exit( &ui_default_free, "UI" );
 225
 226         vg_register();
 227         vg_register_exit( &vg_free, "vg_free" );
 228    vg_register_exit( &sw_free_opengl, "steamworks (opengl)" );
 229
 230         if( vg_shaders_compile() )
 231         {
 232                 vg_start();
 233
 234                 vg_console_init();
 235                 vg_register_exit( &vg_console_free, "Console" );
 236
 237                 vg_audio_init();
 238                 vg_register_exit( &vg_audio_free, "vg_audio_free" );
 239
 240                 vg_debugtools_setup();
 241
 242                 // Main gameloop
 243                 while( !glfwWindowShouldClose( vg_window ) )
 244                 {
 245                         v2_copy( (v2f){ 0.0f, 0.0f }, vg_mouse_wheel );
 246
 247                         glfwPollEvents();
 248                         sw_event_loop();
 249
 250                         vg_time_last = vg_time;
 251                         vg_time = glfwGetTime();
 252                         vg_time_delta = vg_minf( vg_time - vg_time_last, 0.1f );
 253
 254                         vg_update_inputs();
 255                         vg_update();
 256                         vg_render();
 257
 258                         vg_lines_drawall((float*)vg_pv);
 259
 260                         {
 261                                 ui_begin( &ui_global_ctx, vg_window_x, vg_window_y );
 262                                 ui_set_mouse( &ui_global_ctx, vg_mouse[0], vg_mouse[1], vg_get_button_state( "primary" ) );
 263
 264                                 vg_ui();
 265                                 vg_console_draw();
 266                                 vg_debugtools_draw();
 267
 268                                 ui_resolve( &ui_global_ctx );
 269                                 ui_draw( &ui_global_ctx, NULL );
 270                         }
 271
 272                         glfwSwapBuffers( vg_window );
 273
 274                         VG_CHECK_GL();
 275                 }
 276         }
 277
 278         vg_exit();
 279 }
 280
 281 // Screen projections
 282 // ============================================================================================
 283
 284 void vg_projection_update(void)
 285 {
 286         // Do transform local->world
 287         vg_mouse_ws[0] = vg_mouse[0];
 288         vg_mouse_ws[1] = vg_mouse[1];
 289         vg_mouse_ws[2] = 1.0f;
 290
 291         vg_mouse_ws[0] =   (2.0f * vg_mouse_ws[0]) / ((float)vg_window_x) - 1.0f;
 292         vg_mouse_ws[1] = -((2.0f * vg_mouse_ws[1]) / ((float)vg_window_y) - 1.0f);
 293
 294         m3x3f inverse;
 295         m3x3_inv( vg_pv, inverse );
 296         m3x3_mulv( inverse, vg_mouse_ws, vg_mouse_ws );
 297 }
 298
 299 #endif
 300
 301 u32 NvOptimusEnablement = 0x00000001;
 302 int AmdPowerXpressRequestHighPerformance = 1;