added glad generator and a glad runtime

tools/glad-0.1.14a0/glad/lang/nim/loader/glx.py

@@ -0,0 +1,51 @@
+from glad.lang.common.loader import BaseLoader
+from glad.lang.nim.loader import LOAD_OPENGL_DLL
+
+
+# TODO this is just a quick initial conversion of the D loader
+
+_GLX_LOADER = \
+    LOAD_OPENGL_DLL % {'pre':'private', 'init':'open_gl',
+                       'proc':'get_proc', 'terminate':'close_gl'} + '''
+bool gladLoadGLX() {
+    bool status = false
+
+    if(open_gl()) {
+        status = gladLoadGLX(x => get_proc(x))
+        close_gl()
+    }
+
+    return status
+}
+'''
+
+_GLX_HAS_EXT = '''
+private bool has_ext(const(char)* name) @nogc {
+    return true
+}
+'''
+
+
+class GLXNimLoader(BaseLoader):
+    def write_header_end(self, fobj):
+        pass
+
+    def write_header(self, fobj):
+        pass
+
+    def write(self, fobj):
+        fobj.write('alias Loader = void* delegate(const(char)*)\n')
+        if not self.disabled:
+            fobj.write(_GLX_LOADER)
+
+    def write_begin_load(self, fobj):
+        pass
+
+    def write_end_load(self, fobj):
+        fobj.write('  return true\n')
+
+    def write_find_core(self, fobj):
+        pass
+
+    def write_has_ext(self, fobj):
+        fobj.write(_GLX_HAS_EXT)