src/vg/vg.h

   1 /* Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved */
   2
   3 #ifndef VG_HEADER_H
   4 #define VG_HEADER_H
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <dirent.h>
   9 #include <string.h>
  10 #include <stdarg.h>
  11 #include <ctype.h>
  12 #include <math.h>
  13
  14 #if defined(VG_SERVER) || defined(VG_TOOLS)
  15  #define VG_NON_CLIENT
  16 #endif
  17
  18 #ifndef VG_SERVER
  19 #include "../../dep/glad/glad.h"
  20 #include "../../dep/glfw/glfw3.h"
  21 #endif
  22
  23 #define STB_DS_IMPLEMENTATION
  24 #include "stb/stb_ds.h"
  25
  26 #define QOI_IMPLEMENTATION
  27 #include "phoboslab/qoi.h"
  28
  29 #include "vg_stdint.h"
  30 #include "vg_platform.h"
  31
  32 void vg_register_exit( void( *funcptr )(void), const char *name );
  33 void vg_exiterr( const char *strErr );
  34
  35 #include "vg_m.h"
  36 #include "vg_io.h"
  37
  38 #ifdef VG_STEAM
  39 //#include "vg_steamworks.h"
  40 #include "vg_steam.h"
  41 #endif
  42
  43 #ifndef VG_NON_CLIENT
  44 #include "vg_gldiag.h"
  45 #endif
  46
  47 #ifndef VG_NON_CLIENT
  48
  49 /* Engine globals */
  50 GLFWwindow* vg_window;
  51
  52 #ifdef VG_3D
  53  m4x4f vg_pv;
  54 #else
  55  m3x3f vg_pv;
  56 #endif
  57
  58 #ifdef VG_CAPTURE_MODE
  59 int vg_window_x = 1920;
  60 int vg_window_y = 1080;
  61 #else
  62 int vg_window_x = 1366;
  63 int vg_window_y = 768;
  64 #endif
  65
  66 v2f vg_mouse;
  67 v2f vg_mouse_wheel;
  68 v3f vg_mouse_ws;
  69
  70 double vg_time,
  71        vg_time_last,
  72        vg_time_delta;
  73
  74 #include "vg_audio.h"
  75 #include "vg_shader.h"
  76 #include "vg_tex.h"
  77 #include "vg_input.h"
  78 #include "vg_ui.h"
  79 #include "vg_console.h"
  80 #include "vg_lines.h"
  81 #include "vg_debug.h"
  82
  83 #ifndef VG_RELEASE
  84 void vg_checkgl( const char *src_info )
  85 {
  86    GLenum err;
  87    while( (err = glGetError()) != GL_NO_ERROR )
  88    {
  89       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
  90    }
  91 }
  92
  93  #define VG_STRINGIT( X ) #X
  94  #define VG_CHECK_GL() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
  95 #else
  96  #define VG_CHECK_GL()
  97 #endif
  98
  99
 100 #define VG_GAMELOOP
 101
 102 void( *vg_on_exit[16] )(void);
 103 u32 vg_exit_count = 0;
 104
 105 void vg_register_exit( void( *funcptr )(void), const char *name )
 106 {
 107    vg_info( "exit registered: (%u)'%s'\n", vg_exit_count, name );
 108    vg_on_exit[ vg_exit_count ++ ] = funcptr;
 109 }
 110
 111 void vg_exit(void)
 112 {
 113    for( int i = vg_exit_count-1; i >= 0; i -- )
 114    {
 115       vg_info( "engine_exit[%d]()\n", i );
 116       vg_on_exit[i]();
 117    }
 118
 119    vg_info( "done\n" );
 120 }
 121
 122 void vg_exiterr( const char *strErr )
 123 {
 124    vg_error( "Engine Fatal: %s\n", strErr );
 125    vg_exit();
 126    exit(0);
 127 }
 128
 129 void vg_mouse_callback( GLFWwindow* ptrW, double xpos, double ypos )
 130 {
 131    vg_mouse[0] = xpos;
 132    vg_mouse[1] = ypos;
 133 }
 134
 135 void vg_scroll_callback( GLFWwindow* ptrW, double xoffset, double yoffset )
 136 {
 137    vg_mouse_wheel[0] += xoffset;
 138    vg_mouse_wheel[1] += yoffset;
 139 }
 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_framebuffer_resize(int w, int h) VG_GAMELOOP;
 146 static void vg_render(void) VG_GAMELOOP;
 147 static void vg_ui(void) VG_GAMELOOP;
 148 static void vg_free(void) VG_GAMELOOP;
 149
 150 void vg_framebuffer_resize_callback( GLFWwindow *ptrW, int w, int h )
 151 {
 152    vg_window_x = w;
 153    vg_window_y = h;
 154
 155 #ifdef VG_FRAMEBUFFER_RESIZE
 156    vg_framebuffer_resize(w,h);
 157 #endif
 158 }
 159
 160 static void vg_init( int argc, char *argv[], const char *window_name )
 161 {
 162 #ifdef VG_STEAM
 163    if( !sw_init() )
 164       return;
 165 #endif
 166
 167    glfwInit();
 168    glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
 169    glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
 170    glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
 171    glfwWindowHint( GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE );
 172
 173 #ifdef VG_CAPTURE_MODE
 174    glfwWindowHint( GLFW_RESIZABLE, GLFW_FALSE );
 175 #else
 176    glfwWindowHint( GLFW_RESIZABLE, GLFW_TRUE );
 177 #endif
 178    glfwWindowHint(GLFW_DOUBLEBUFFER, GLFW_TRUE);
 179
 180 #if 0
 181    glfwWindowHint(GLFW_SAMPLES,4);
 182 #endif
 183
 184    GLFWmonitor *monitor_primary = glfwGetPrimaryMonitor();
 185
 186    const GLFWvidmode *mode = glfwGetVideoMode( monitor_primary );
 187    glfwWindowHint( GLFW_RED_BITS, mode->redBits );
 188    glfwWindowHint( GLFW_GREEN_BITS, mode->greenBits );
 189    glfwWindowHint( GLFW_BLUE_BITS, mode->blueBits );
 190
 191    int refresh_rate = mode->refreshRate;
 192
 193    if( refresh_rate < 28 || refresh_rate >= 144 )
 194       refresh_rate = 60;
 195
 196    glfwWindowHint( GLFW_REFRESH_RATE, refresh_rate );
 197
 198    if( !(vg_window = glfwCreateWindow( vg_window_x, vg_window_y,
 199                                        window_name, NULL, NULL)) )
 200       vg_exiterr( "GLFW Failed to initialize" );
 201    else
 202       vg_register_exit( &glfwTerminate, "glfwTerminate" );
 203
 204    glfwMakeContextCurrent( vg_window );
 205    glfwSwapInterval( 1 );
 206
 207    glfwSetWindowSizeLimits( vg_window, 800, 600, GLFW_DONT_CARE,GLFW_DONT_CARE);
 208    glfwSetFramebufferSizeCallback( vg_window, vg_framebuffer_resize_callback );
 209
 210    glfwSetCursorPosCallback( vg_window, vg_mouse_callback );
 211    glfwSetScrollCallback( vg_window, vg_scroll_callback );
 212
 213    glfwSetCharCallback( vg_window, console_proc_wchar );
 214    glfwSetKeyCallback( vg_window, console_proc_key );
 215 #if 0
 216    glfwSetInputMode(vg_window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
 217 #endif
 218
 219    if( !gladLoadGLLoader((GLADloadproc)glfwGetProcAddress) )
 220       vg_exiterr( "Glad failed to initialize" );
 221
 222    const unsigned char* glver = glGetString( GL_VERSION );
 223    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 224
 225    vg_run_gfx_diagnostics();
 226
 227    vg_gamepad_init();
 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
 237    vg_shaders_recompile(0,NULL);
 238    vg_register_exit( &vg_shaders_free, "vg_shaders_free" );
 239         vg_function_push( (struct vg_cmd){
 240                 .name = "shaders",
 241                 .function = vg_shaders_recompile
 242         });
 243
 244
 245    vg_start();
 246
 247    vg_console_init();
 248    vg_register_exit( &vg_console_free, "Console" );
 249
 250    vg_audio_init();
 251    vg_register_exit( &vg_audio_free, "vg_audio_free" );
 252
 253    vg_debugtools_setup();
 254
 255    /*
 256     * Main gameloop
 257     */
 258    while( !glfwWindowShouldClose( vg_window ) )
 259    {
 260       v2_copy( (v2f){ 0.0f, 0.0f }, vg_mouse_wheel );
 261
 262       glfwPollEvents();
 263
 264       #ifdef VG_STEAM
 265       sw_event_loop();
 266       #endif
 267
 268       vg_time_last = vg_time;
 269       vg_time = glfwGetTime();
 270       vg_time_delta = vg_minf( vg_time - vg_time_last, 0.1f );
 271
 272       vg_update_inputs();
 273       vg_update();
 274       vg_render();
 275
 276       vg_lines_drawall((float*)vg_pv);
 277
 278       {
 279          ui_begin( &ui_global_ctx, vg_window_x, vg_window_y );
 280          ui_set_mouse( &ui_global_ctx, vg_mouse[0], vg_mouse[1],
 281                vg_get_button_state( "primary" ) );
 282
 283          vg_ui();
 284          vg_console_draw();
 285          vg_debugtools_draw();
 286
 287          ui_resolve( &ui_global_ctx );
 288          ui_draw( &ui_global_ctx, NULL );
 289       }
 290
 291       glfwSwapBuffers( vg_window );
 292       VG_CHECK_GL();
 293    }
 294
 295    vg_exit();
 296 }
 297
 298 #ifndef VG_3D
 299 void vg_projection_update(void)
 300 {
 301    /*
 302     * Reproject screenspace mouse into world
 303     */
 304
 305    vg_mouse_ws[0] = vg_mouse[0];
 306    vg_mouse_ws[1] = vg_mouse[1];
 307    vg_mouse_ws[2] = 1.0f;
 308
 309    vg_mouse_ws[0] =   (2.0f * vg_mouse_ws[0]) / ((float)vg_window_x) - 1.0f;
 310    vg_mouse_ws[1] = -((2.0f * vg_mouse_ws[1]) / ((float)vg_window_y) - 1.0f);
 311
 312    m3x3f inverse;
 313    m3x3_inv( vg_pv, inverse );
 314    m3x3_mulv( inverse, vg_mouse_ws, vg_mouse_ws );
 315 }
 316 #endif
 317
 318 #endif
 319
 320 /*
 321  * Graphic cards will check these to force it to use the GPU
 322  */
 323 u32 NvOptimusEnablement = 0x00000001;
 324 int AmdPowerXpressRequestHighPerformance = 1;
 325
 326 #endif