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