diff -r 000000000000 -r 6474c204b198 gfx/gl/WGLLibrary.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/gl/WGLLibrary.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "GLContextTypes.h"
+#include <windows.h>
+
+struct PRLibrary;
+
+namespace mozilla {
+namespace gl {
+
+class WGLLibrary
+{
+public:
+    WGLLibrary() 
+      : mInitialized(false), 
+        mOGLLibrary(nullptr),
+        mHasRobustness(false), 
+        mWindow (0),
+        mWindowDC(0),
+        mWindowGLContext(0),
+        mWindowPixelFormat (0)
+    {}
+
+    typedef HGLRC (GLAPIENTRY * PFNWGLCREATECONTEXTPROC) (HDC);
+    PFNWGLCREATECONTEXTPROC fCreateContext;
+    typedef BOOL (GLAPIENTRY * PFNWGLDELETECONTEXTPROC) (HGLRC);
+    PFNWGLDELETECONTEXTPROC fDeleteContext;
+    typedef BOOL (GLAPIENTRY * PFNWGLMAKECURRENTPROC) (HDC, HGLRC);
+    PFNWGLMAKECURRENTPROC fMakeCurrent;
+    typedef PROC (GLAPIENTRY * PFNWGLGETPROCADDRESSPROC) (LPCSTR);
+    PFNWGLGETPROCADDRESSPROC fGetProcAddress;
+    typedef HGLRC (GLAPIENTRY * PFNWGLGETCURRENTCONTEXT) (void);
+    PFNWGLGETCURRENTCONTEXT fGetCurrentContext;
+    typedef HDC (GLAPIENTRY * PFNWGLGETCURRENTDC) (void);
+    PFNWGLGETCURRENTDC fGetCurrentDC;
+    typedef BOOL (GLAPIENTRY * PFNWGLSHARELISTS) (HGLRC oldContext, HGLRC newContext);
+    PFNWGLSHARELISTS fShareLists;
+
+    typedef HANDLE (WINAPI * PFNWGLCREATEPBUFFERPROC) (HDC hDC, int iPixelFormat, int iWidth, int iHeight, const int* piAttribList);
+    PFNWGLCREATEPBUFFERPROC fCreatePbuffer;
+    typedef BOOL (WINAPI * PFNWGLDESTROYPBUFFERPROC) (HANDLE hPbuffer);
+    PFNWGLDESTROYPBUFFERPROC fDestroyPbuffer;
+    typedef HDC (WINAPI * PFNWGLGETPBUFFERDCPROC) (HANDLE hPbuffer);
+    PFNWGLGETPBUFFERDCPROC fGetPbufferDC;
+
+    typedef BOOL (WINAPI * PFNWGLBINDTEXIMAGEPROC) (HANDLE hPbuffer, int iBuffer);
+    PFNWGLBINDTEXIMAGEPROC fBindTexImage;
+    typedef BOOL (WINAPI * PFNWGLRELEASETEXIMAGEPROC) (HANDLE hPbuffer, int iBuffer);
+    PFNWGLRELEASETEXIMAGEPROC fReleaseTexImage;
+
+    typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATPROC) (HDC hdc, const int* piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
+    PFNWGLCHOOSEPIXELFORMATPROC fChoosePixelFormat;
+    typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, int* piAttributes, int *piValues);
+    PFNWGLGETPIXELFORMATATTRIBIVPROC fGetPixelFormatAttribiv;
+
+    typedef const char * (WINAPI * PFNWGLGETEXTENSIONSSTRINGPROC) (HDC hdc);
+    PFNWGLGETEXTENSIONSSTRINGPROC fGetExtensionsString;
+
+    typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSPROC) (HDC hdc, HGLRC hShareContext, const int *attribList);
+    PFNWGLCREATECONTEXTATTRIBSPROC fCreateContextAttribs;
+
+    bool EnsureInitialized();
+    HWND CreateDummyWindow(HDC *aWindowDC = nullptr);
+
+    bool HasRobustness() const { return mHasRobustness; }
+    bool IsInitialized() const { return mInitialized; }
+    HWND GetWindow() const { return mWindow; }
+    HDC GetWindowDC() const {return mWindowDC; }
+    HGLRC GetWindowGLContext() const {return mWindowGLContext; }
+    int GetWindowPixelFormat() const { return mWindowPixelFormat; }
+    PRLibrary *GetOGLLibrary() { return mOGLLibrary; }
+
+private:
+    bool mInitialized;
+    PRLibrary *mOGLLibrary;
+    bool mHasRobustness;
+
+    HWND mWindow;
+    HDC mWindowDC;
+    HGLRC mWindowGLContext;
+    int mWindowPixelFormat;
+
+};
+
+// a global WGLLibrary instance
+extern WGLLibrary sWGLLibrary;
+
+} /* namespace gl */
+} /* namespace mozilla */
+