pull in DerelictGL3 and load it

.gitmodules

@@ -4,3 +4,12 @@
 [submodule "libs/glcxx"]
 	path = libs/glcxx
 	url = git://github.com/holtrop/glcxx.git
+[submodule "libs/DerelictGL3"]
+	path = libs/DerelictGL3
+	url = git://github.com/DerelictOrg/DerelictGL3
+[submodule "libs/DerelictGLFW3"]
+	path = libs/DerelictGLFW3
+	url = git://github.com/DerelictOrg/DerelictGLFW3
+[submodule "libs/DerelictUtil"]
+	path = libs/DerelictUtil
+	url = git://github.com/DerelictOrg/DerelictUtil

Rsconscript

@@ -6,9 +6,9 @@ end
 
 build do
   main_env = Rscons::Environment.new do |env|
-    env["sources"] = glob("src/**/*.{c,d}")
+    env["sources"] = glob("src/**/*.{c,d}", "libs/Derelict*/**/*.d")
     env["CCFLAGS"] += %w[-Wall]
-    env["D_IMPORT_PATH"] += glob("src/**")
+    env["D_IMPORT_PATH"] += glob("src/**", "libs/Derelict*/source")
     env["DFLAGS"] += %w[-Wall]
     env["LIBS"] += %w[X11 GLX]
     env.Program("jes", "${sources}")

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;