added glad generator and a glad runtime

tools/glad-0.1.14a0/glad/lang/volt/loader/egl.py

@@ -0,0 +1,48 @@
+from glad.lang.common.loader import BaseLoader
+from glad.lang.d.loader.egl import _EGL_HAS_EXT as _D_EGL_HAS_EXT
+
+
+_EGL_LOADER = '''
+private struct StructToDg {
+    void* instance;
+    void* func;
+}
+
+private void* get_proc(string name) {
+    return eglGetProcAddress(arg.ptr);
+}
+
+bool gladLoadEGL() {
+    StructToDg structToDg;
+    structToDg.func = cast(void*)get_proc;
+    auto dg = *cast(Loader*)&structToDg;
+
+    return gladLoadEGL(dg);
+}
+'''
+_EGL_HAS_EXT = _D_EGL_HAS_EXT
+
+
+class EGLVoltLoader(BaseLoader):
+    def write_header_end(self, fobj):
+        pass
+
+    def write_header(self, fobj):
+        pass
+
+    def write(self, fobj):
+        fobj.write('import watt.library;\n')
+        if not self.disabled:
+            fobj.write(_EGL_LOADER)
+
+    def write_begin_load(self, fobj):
+        pass
+
+    def write_end_load(self, fobj):
+        fobj.write('\treturn true;')
+
+    def write_find_core(self, fobj):
+        pass
+
+    def write_has_ext(self, fobj):
+        fobj.write(_EGL_HAS_EXT)