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 #include "vg/vg_steamworks.h"
  68
  69 // Engine main
  70 // ===========================================================================================================
  71
  72 #ifndef VG_RELEASE
  73 void vg_checkgl( const char *src_info )
  74 {
  75         GLenum err;
  76         while( (err = glGetError()) != GL_NO_ERROR )
  77         {
  78                 vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
  79         }
  80 }
  81
  82  #define VG_STRINGIT( X ) #X
  83  #define VG_CHECK_GL() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
  84 #else
  85  #define VG_CHECK_GL()
  86 #endif
  87
  88
  89 #define VG_GAMELOOP
  90
  91 void( *vg_on_exit[16] )(void);
  92 u32 vg_exit_count = 0;
  93
  94 // Add a shutdown step
  95 void vg_register_exit( void( *funcptr )(void), const char *name )
  96 {
  97         vg_info( "exit registered: (%u)'%s'\n", vg_exit_count, name );
  98         vg_on_exit[ vg_exit_count ++ ] = funcptr;
  99 }
 100
 101 void vg_exit(void)
 102 {
 103         for( int i = vg_exit_count-1; i >= 0; i -- )
 104         {
 105                 vg_info( "engine_exit[%d]()\n", i );
 106                 vg_on_exit[i]();
 107         }
 108
 109         vg_info( "done\n" );
 110 }
 111
 112 // Forcefully exit program after error
 113 void vg_exiterr( const char *strErr )
 114 {
 115         vg_error( "Engine Fatal: %s\n", strErr );
 116         vg_exit();
 117         exit(0);
 118 }
 119
 120 // Callbacks
 121 // ---------
 122
 123 void vg_mouse_callback( GLFWwindow* ptrW, double xpos, double ypos )
 124 {
 125         vg_mouse[0] = xpos;
 126         vg_mouse[1] = ypos;
 127 }
 128
 129 void vg_scroll_callback( GLFWwindow* ptrW, double xoffset, double yoffset )
 130 {
 131
 132 }
 133
 134 void vg_framebuffer_resize_callback( GLFWwindow *ptrW, int w, int h )
 135 {
 136         vg_window_x = w;
 137         vg_window_y = h;
 138 }
 139
 140 static void vg_register(void) VG_GAMELOOP;
 141 static void vg_start(void) VG_GAMELOOP;
 142 static void vg_update(void) VG_GAMELOOP;
 143 static void vg_render(void) VG_GAMELOOP;
 144 static void vg_ui(void) VG_GAMELOOP;
 145 static void vg_free(void) VG_GAMELOOP;
 146
 147 static void vg_init( int argc, char *argv[], const char *window_name )
 148 {
 149 #ifdef VG_STEAM
 150         // Initialize steamworks
 151         if( !sw_init() )
 152                 return;
 153 #endif
 154
 155         // Context creation
 156         // ==========================================================================================================================
 157         glfwInit();
 158         glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
 159         glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
 160         glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
 161         glfwWindowHint( GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE );
 162
 163 #ifdef VG_CAPTURE_MODE
 164         glfwWindowHint( GLFW_RESIZABLE, GLFW_FALSE );
 165 #else
 166         glfwWindowHint( GLFW_RESIZABLE, GLFW_TRUE );
 167 #endif
 168
 169         glfwWindowHint( GLFW_SAMPLES, 4 );
 170
 171         GLFWmonitor *monitor_primary = glfwGetPrimaryMonitor();
 172
 173         const GLFWvidmode *mode = glfwGetVideoMode( monitor_primary );
 174         glfwWindowHint( GLFW_RED_BITS, mode->redBits );
 175         glfwWindowHint( GLFW_GREEN_BITS, mode->greenBits );
 176         glfwWindowHint( GLFW_BLUE_BITS, mode->blueBits );
 177         glfwWindowHint( GLFW_REFRESH_RATE, mode->refreshRate );
 178
 179         if( !(vg_window = glfwCreateWindow( vg_window_x, vg_window_y, window_name, NULL, NULL)) )
 180         {
 181                 vg_exiterr( "GLFW Failed to initialize" );
 182         }
 183         else
 184         {
 185                 vg_register_exit( &glfwTerminate, "glfwTerminate" );
 186         }
 187
 188         glfwMakeContextCurrent( vg_window );
 189         glfwSwapInterval( 1 );
 190
 191         // Set callbacks
 192         glfwSetFramebufferSizeCallback( vg_window, vg_framebuffer_resize_callback );
 193
 194         glfwSetCursorPosCallback( vg_window, vg_mouse_callback );
 195         glfwSetScrollCallback( vg_window, vg_scroll_callback );
 196
 197         glfwSetCharCallback( vg_window, console_proc_wchar );
 198         glfwSetKeyCallback( vg_window, console_proc_key );
 199         //glfwSetInputMode(vg_window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
 200
 201         if( !gladLoadGLLoader((GLADloadproc)glfwGetProcAddress) )
 202         {
 203                 vg_exiterr( "Glad failed to initialize" );
 204         }
 205
 206         const unsigned char* glver = glGetString( GL_VERSION );
 207         vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 208
 209         vg_console_init();
 210         vg_register_exit( &vg_console_free, "Console" );
 211
 212         vg_run_gfx_diagnostics();
 213
 214         for( int id = 0; id <= GLFW_JOYSTICK_LAST; id ++ )
 215         {
 216                 if( glfwJoystickIsGamepad( id ) )
 217                 {
 218                         vg_gamepad_name = glfwGetGamepadName( id );
 219                         vg_success( "Gamepad with mapping registered: %s\n", vg_gamepad_name );
 220
 221                         vg_gamepad_ready = 1;
 222                         vg_gamepad_id = id;
 223
 224                         break;
 225                 }
 226         }
 227
 228         vg_lines_init();
 229         vg_register_exit( &vg_lines_free, "vg_lines_free" );
 230         ui_default_init();
 231         vg_register_exit( &ui_default_free, "UI" );
 232
 233         vg_register();
 234         vg_register_exit( &vg_free, "vg_free" );
 235
 236         if( vg_shaders_compile() )
 237         {
 238                 vg_start();
 239
 240                 vg_audio_init();
 241                 vg_register_exit( &vg_audio_free, "vg_audio_free" );
 242
 243                 vg_debugtools_setup();
 244
 245                 // Main gameloop
 246                 while( !glfwWindowShouldClose( vg_window ) )
 247                 {
 248                         glfwPollEvents();
 249
 250                         #ifdef VG_STEAM
 251                         sw_event_loop();
 252                         #endif
 253
 254                         vg_time_last = vg_time;
 255                         vg_time = glfwGetTime();
 256                         vg_time_delta = vg_minf( vg_time - vg_time_last, 0.1f );
 257
 258                         vg_update_inputs();
 259                         vg_update();
 260                         vg_render();
 261
 262                         vg_lines_drawall((float*)vg_pv);
 263
 264                         {
 265                                 ui_begin( &ui_global_ctx, vg_window_x, vg_window_y );
 266                                 ui_set_mouse( &ui_global_ctx, vg_mouse[0], vg_mouse[1], vg_get_button_state( "primary" ) );
 267
 268                                 vg_ui();
 269                                 vg_console_draw();
 270                                 vg_debugtools_draw();
 271
 272                                 ui_resolve( &ui_global_ctx );
 273                                 ui_draw( &ui_global_ctx, NULL );
 274                         }
 275
 276                         glfwSwapBuffers( vg_window );
 277
 278                         VG_CHECK_GL();
 279                 }
 280         }
 281
 282         vg_exit();
 283 }
 284
 285 // Screen projections
 286 // ============================================================================================
 287
 288 void vg_projection_update(void)
 289 {
 290         // Do transform local->world
 291         vg_mouse_ws[0] = vg_mouse[0];
 292         vg_mouse_ws[1] = vg_mouse[1];
 293         vg_mouse_ws[2] = 1.0f;
 294
 295         vg_mouse_ws[0] =   (2.0f * vg_mouse_ws[0]) / ((float)vg_window_x) - 1.0f;
 296         vg_mouse_ws[1] = -((2.0f * vg_mouse_ws[1]) / ((float)vg_window_y) - 1.0f);
 297
 298         m3x3f inverse;
 299         m3x3_inv( vg_pv, inverse );
 300         m3x3_mulv( inverse, vg_mouse_ws, vg_mouse_ws );
 301 }
 302
 303 #endif
 304
 305 u32 NvOptimusEnablement = 0x00000001;
 306 int AmdPowerXpressRequestHighPerformance = 1;