added missing wrappers

lib/wrappers/gtk/gtkglext.nim

@@ -0,0 +1,46 @@
+{.deadCodeElim: on.}
+import 
+  Glib2, Gdk2, gtk2, GdkGLExt
+
+const 
+  GLExtLib* = if defined(WIN32): "libgtkglext-win32-1.0-0.dll" else: "libgtkglext-x11-1.0.so"
+
+const 
+  HEADER_GTKGLEXT_MAJOR_VERSION* = 1
+  HEADER_GTKGLEXT_MINOR_VERSION* = 0
+  HEADER_GTKGLEXT_MICRO_VERSION* = 6
+  HEADER_GTKGLEXT_INTERFACE_AGE* = 4
+  HEADER_GTKGLEXT_BINARY_AGE* = 6
+
+proc gl_parse_args*(argc: ptr int32, argv: PPPChar): gboolean{.cdecl, 
+    dynlib: GLExtLib, importc: "gtk_gl_parse_args".}
+proc gl_init_check*(argc: ptr int32, argv: PPPChar): gboolean{.cdecl, 
+    dynlib: GLExtLib, importc: "gtk_gl_init_check".}
+proc gl_init*(argc: ptr int32, argv: PPPChar){.cdecl, dynlib: GLExtLib, 
+    importc: "gtk_gl_init".}
+proc set_gl_capability*(widget: PWidget, glconfig: PGLConfig, 
+                               share_list: PGLContext, direct: gboolean, 
+                               render_type: int): gboolean{.cdecl, 
+    dynlib: GLExtLib, importc: "gtk_widget_set_gl_capability".}
+proc is_gl_capable*(widget: PWidget): gboolean{.cdecl, dynlib: GLExtLib, 
+    importc: "gtk_widget_is_gl_capable".}
+proc get_gl_config*(widget: PWidget): PGLConfig{.cdecl, 
+    dynlib: GLExtLib, importc: "gtk_widget_get_gl_config".}
+proc create_gl_context*(widget: PWidget, share_list: PGLContext, 
+                               direct: gboolean, render_type: int): PGLContext{.
+    cdecl, dynlib: GLExtLib, importc: "gtk_widget_create_gl_context".}
+proc get_gl_context*(widget: PWidget): PGLContext{.cdecl, 
+    dynlib: GLExtLib, importc: "gtk_widget_get_gl_context".}
+proc get_gl_window*(widget: PWidget): PGLWindow{.cdecl, 
+    dynlib: GLExtLib, importc: "gtk_widget_get_gl_window".}
+
+proc HEADER_GTKGLEXT_CHECK_VERSION*(major, minor, micro: guint): bool = 
+  result = (HEADER_GTKGLEXT_MAJOR_VERSION > major) or
+      ((HEADER_GTKGLEXT_MAJOR_VERSION == major) and
+      (HEADER_GTKGLEXT_MINOR_VERSION > minor)) or
+      ((HEADER_GTKGLEXT_MAJOR_VERSION == major) and
+      (HEADER_GTKGLEXT_MINOR_VERSION == minor) and
+      (HEADER_GTKGLEXT_MICRO_VERSION >= micro))
+
+proc get_gl_drawable*(widget: PWidget): PGLDrawable = 
+  result = GL_DRAWABLE(get_gl_window(widget))