pull in DerelictGL3 and load it

src/jtk/init.d

@@ -4,11 +4,15 @@ static import jtk.event;
 static import jtk.timer;
 static import jtk.window;
 
+import derelict.opengl;
+
 private extern(C) bool jtk_init();
 private extern(C) void jtk_quit();
 
 bool init()
 {
+    DerelictGL3.load();
+
     if (!jtk_init())
     {
         return false;

src/jtk/window.d

@@ -3,6 +3,8 @@ module jtk.window;
 import std.string;
 import core.sync.mutex;
 
+import derelict.opengl;
+
 private extern(C) bool jtk_window_create(ulong * window);
 private extern(C) void jtk_window_swap_buffers(ulong window);
 private extern(C) void jtk_window_close(ulong window);
@@ -14,6 +16,7 @@ class Window
 {
     private static Window[ulong] windows_by_id;
     private static Mutex windows_by_id_mutex;
+    private static bool derelict_reloaded;
     private ulong m_window;
 
     this()
@@ -22,6 +25,11 @@ class Window
         {
             /* TODO */
         }
+        if (!derelict_reloaded)
+        {
+            DerelictGL3.reload();
+            derelict_reloaded = true;
+        }
         synchronized(windows_by_id_mutex)
         {
             windows_by_id[m_window] = this;