src/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 "glad/glad.h"
  13 #include "glfw/glfw3.h"
  14
  15 #define STB_DS_IMPLEMENTATION
  16 #include "stb/stb_ds.h"
  17
  18 #define QOI_IMPLEMENTATION
  19 #include "phoboslab/qoi.h"
  20
  21 #include "vg/vg_platform.h"
  22
  23 void vg_register_exit( void( *funcptr )(void), const char *name );
  24 void vg_exiterr( const char *strErr );
  25
  26 #include "vg/vg_m.h"
  27 #include "vg/vg_io.h"
  28 #include "vg/vg_gldiag.h"
  29
  30 #ifndef VG_TOOLS
  31
  32 /* Engine globals */
  33 GLFWwindow* vg_window;
  34
  35 #ifdef VG_3D
  36  m4x4f vg_pv;
  37 #else
  38  m3x3f vg_pv;
  39 #endif
  40
  41 #ifdef VG_CAPTURE_MODE
  42 int vg_window_x = 1920;
  43 int vg_window_y = 1080;
  44 #else
  45 int vg_window_x = 1366;
  46 int vg_window_y = 768;
  47 #endif
  48
  49 v2f vg_mouse;
  50 v2f vg_mouse_wheel;
  51 v3f vg_mouse_ws;
  52
  53 double vg_time,
  54        vg_time_last,
  55        vg_time_delta;
  56
  57 #include "vg/vg_audio.h"
  58 #include "vg/vg_shader.h"
  59 #include "vg/vg_lines.h"
  60 #include "vg/vg_tex.h"
  61 #include "vg/vg_input.h"
  62 #include "vg/vg_ui.h"
  63 #include "vg/vg_console.h"
  64 #include "vg/vg_debug.h"
  65
  66 #ifdef VG_STEAM
  67 #include "vg/vg_steamworks.h"
  68 #endif
  69
  70 #ifndef VG_RELEASE
  71 void vg_checkgl( const char *src_info )
  72 {
  73    GLenum err;
  74    while( (err = glGetError()) != GL_NO_ERROR )
  75    {
  76       vg_error( "(%s) OpenGL Error: #%d\n", src_info, err );
  77    }
  78 }
  79
  80  #define VG_STRINGIT( X ) #X
  81  #define VG_CHECK_GL() vg_checkgl( __FILE__ ":L" VG_STRINGIT(__LINE__) )
  82 #else
  83  #define VG_CHECK_GL()
  84 #endif
  85
  86
  87 #define VG_GAMELOOP
  88
  89 void( *vg_on_exit[16] )(void);
  90 u32 vg_exit_count = 0;
  91
  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 void vg_exiterr( const char *strErr )
 110 {
 111    vg_error( "Engine Fatal: %s\n", strErr );
 112    vg_exit();
 113    exit(0);
 114 }
 115
 116 void vg_mouse_callback( GLFWwindow* ptrW, double xpos, double ypos )
 117 {
 118    vg_mouse[0] = xpos;
 119    vg_mouse[1] = ypos;
 120 }
 121
 122 void vg_scroll_callback( GLFWwindow* ptrW, double xoffset, double yoffset )
 123 {
 124    vg_mouse_wheel[0] += xoffset;
 125    vg_mouse_wheel[1] += yoffset;
 126 }
 127
 128
 129 static void vg_register(void) VG_GAMELOOP;
 130 static void vg_start(void) VG_GAMELOOP;
 131 static void vg_update(void) VG_GAMELOOP;
 132 static void vg_framebuffer_resize(int w, int h) VG_GAMELOOP;
 133 static void vg_render(void) VG_GAMELOOP;
 134 static void vg_ui(void) VG_GAMELOOP;
 135 static void vg_free(void) VG_GAMELOOP;
 136
 137 void vg_framebuffer_resize_callback( GLFWwindow *ptrW, int w, int h )
 138 {
 139    vg_window_x = w;
 140    vg_window_y = h;
 141
 142 #ifdef VG_FRAMEBUFFER_RESIZE
 143    vg_framebuffer_resize(w,h);
 144 #endif
 145 }
 146
 147 static void vg_init( int argc, char *argv[], const char *window_name )
 148 {
 149 #ifdef VG_STEAM
 150    if( !sw_init() )
 151       return;
 152 #endif
 153
 154    glfwInit();
 155    glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
 156    glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 3 );
 157    glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
 158    glfwWindowHint( GLFW_OPENGL_DEBUG_CONTEXT, GL_TRUE );
 159
 160 #ifdef VG_CAPTURE_MODE
 161    glfwWindowHint( GLFW_RESIZABLE, GLFW_FALSE );
 162 #else
 163    glfwWindowHint( GLFW_RESIZABLE, GLFW_TRUE );
 164 #endif
 165    glfwWindowHint(GLFW_DOUBLEBUFFER, GLFW_TRUE);
 166
 167 #if 0
 168    glfwWindowHint(GLFW_SAMPLES,4);
 169 #endif
 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
 178    int refresh_rate = mode->refreshRate;
 179
 180    if( refresh_rate < 28 || refresh_rate >= 144 )
 181       refresh_rate = 60;
 182
 183    glfwWindowHint( GLFW_REFRESH_RATE, refresh_rate );
 184
 185    if( !(vg_window = glfwCreateWindow( vg_window_x, vg_window_y,
 186                                        window_name, NULL, NULL)) )
 187       vg_exiterr( "GLFW Failed to initialize" );
 188    else
 189       vg_register_exit( &glfwTerminate, "glfwTerminate" );
 190
 191    glfwMakeContextCurrent( vg_window );
 192    glfwSwapInterval( 1 );
 193
 194    glfwSetWindowSizeLimits( vg_window, 800, 600, GLFW_DONT_CARE,GLFW_DONT_CARE);
 195    glfwSetFramebufferSizeCallback( vg_window, vg_framebuffer_resize_callback );
 196
 197    glfwSetCursorPosCallback( vg_window, vg_mouse_callback );
 198    glfwSetScrollCallback( vg_window, vg_scroll_callback );
 199
 200    glfwSetCharCallback( vg_window, console_proc_wchar );
 201    glfwSetKeyCallback( vg_window, console_proc_key );
 202 #if 0
 203    glfwSetInputMode(vg_window, GLFW_CURSOR, GLFW_CURSOR_HIDDEN);
 204 #endif
 205
 206    if( !gladLoadGLLoader((GLADloadproc)glfwGetProcAddress) )
 207       vg_exiterr( "Glad failed to initialize" );
 208
 209    const unsigned char* glver = glGetString( GL_VERSION );
 210    vg_success( "Load setup complete, OpenGL version: %s\n", glver );
 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_console_init();
 241       vg_register_exit( &vg_console_free, "Console" );
 242
 243       vg_audio_init();
 244       vg_register_exit( &vg_audio_free, "vg_audio_free" );
 245
 246       vg_debugtools_setup();
 247
 248       /*
 249        * Main gameloop
 250        */
 251       while( !glfwWindowShouldClose( vg_window ) )
 252       {
 253          v2_copy( (v2f){ 0.0f, 0.0f }, vg_mouse_wheel );
 254
 255          glfwPollEvents();
 256
 257          #ifdef VG_STEAM
 258          sw_event_loop();
 259          #endif
 260
 261          vg_time_last = vg_time;
 262          vg_time = glfwGetTime();
 263          vg_time_delta = vg_minf( vg_time - vg_time_last, 0.1f );
 264
 265          vg_update_inputs();
 266          vg_update();
 267          vg_render();
 268
 269          vg_lines_drawall((float*)vg_pv);
 270
 271          {
 272             ui_begin( &ui_global_ctx, vg_window_x, vg_window_y );
 273             ui_set_mouse( &ui_global_ctx, vg_mouse[0], vg_mouse[1],
 274                   vg_get_button_state( "primary" ) );
 275
 276             vg_ui();
 277             vg_console_draw();
 278             vg_debugtools_draw();
 279
 280             ui_resolve( &ui_global_ctx );
 281             ui_draw( &ui_global_ctx, NULL );
 282          }
 283
 284          glfwSwapBuffers( vg_window );
 285          VG_CHECK_GL();
 286       }
 287    }
 288
 289    vg_exit();
 290 }
 291
 292 #ifndef VG_3D
 293 void vg_projection_update(void)
 294 {
 295    /*
 296     * Reproject screenspace mouse into world
 297     */
 298
 299    vg_mouse_ws[0] = vg_mouse[0];
 300    vg_mouse_ws[1] = vg_mouse[1];
 301    vg_mouse_ws[2] = 1.0f;
 302
 303    vg_mouse_ws[0] =   (2.0f * vg_mouse_ws[0]) / ((float)vg_window_x) - 1.0f;
 304    vg_mouse_ws[1] = -((2.0f * vg_mouse_ws[1]) / ((float)vg_window_y) - 1.0f);
 305
 306    m3x3f inverse;
 307    m3x3_inv( vg_pv, inverse );
 308    m3x3_mulv( inverse, vg_mouse_ws, vg_mouse_ws );
 309 }
 310 #endif
 311
 312 #endif
 313
 314 /*
 315  * Graphic cards will check these to force it to use the GPU
 316  */
 317 u32 NvOptimusEnablement = 0x00000001;
 318 int AmdPowerXpressRequestHighPerformance = 1;