1 files changed, 131 insertions, 0 deletions
diff --git a/gfx/gl/WGLLibrary.h b/gfx/gl/WGLLibrary.h
new file mode 100644
index 000000000..3c261e10d
--- /dev/null
+++ b/gfx/gl/WGLLibrary.h
@@ -0,0 +1,131 @@
+/* -*- 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)
+      , mHasDXInterop(false)
+      , mHasDXInterop2(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;
+
+    // WGL_NV_DX_interop:
+    // BOOL wglDXSetResourceShareHandleNV(void* dxObject, HANDLE shareHandle);
+    typedef BOOL (WINAPI * PFNWGLDXSETRESOURCESHAREHANDLEPROC) (void* dxObject, HANDLE shareHandle);
+    PFNWGLDXSETRESOURCESHAREHANDLEPROC fDXSetResourceShareHandle;
+
+    // HANDLE wglDXOpenDeviceNV(void* dxDevice);
+    typedef HANDLE (WINAPI * PFNWGLDXOPENDEVICEPROC) (void* dxDevice);
+    PFNWGLDXOPENDEVICEPROC fDXOpenDevice;
+
+    // BOOL wglDXCloseDeviceNV(HANDLE hDevice);
+    typedef BOOL (WINAPI * PFNWGLDXCLOSEDEVICEPROC) (HANDLE hDevice);
+    PFNWGLDXCLOSEDEVICEPROC fDXCloseDevice;
+
+    // HANDLE wglDXRegisterObjectNV(HANDLE hDevice, void* dxObject, GLuint name, GLenum type, GLenum access);
+    typedef HANDLE (WINAPI * PFNWGLDXREGISTEROBJECTPROC) (HANDLE hDevice, void* dxObject, GLuint name, GLenum type, GLenum access);
+    PFNWGLDXREGISTEROBJECTPROC fDXRegisterObject;
+
+    // BOOL wglDXUnregisterObjectNV(HANDLE hDevice, HANDLE hObject);
+    typedef BOOL (WINAPI * PFNWGLDXUNREGISTEROBJECT) (HANDLE hDevice, HANDLE hObject);
+    PFNWGLDXUNREGISTEROBJECT fDXUnregisterObject;
+
+    // BOOL wglDXObjectAccessNV(HANDLE hObject, GLenum access);
+    typedef BOOL (WINAPI * PFNWGLDXOBJECTACCESSPROC) (HANDLE hObject, GLenum access);
+    PFNWGLDXOBJECTACCESSPROC fDXObjectAccess;
+
+    // BOOL wglDXLockObjectsNV(HANDLE hDevice, GLint count, HANDLE* hObjects);
+    typedef BOOL (WINAPI * PFNWGLDXLOCKOBJECTSPROC) (HANDLE hDevice, GLint count, HANDLE* hObjects);
+    PFNWGLDXLOCKOBJECTSPROC fDXLockObjects;
+
+    // BOOL wglDXUnlockObjectsNV(HANDLE hDevice, GLint count, HANDLE* hObjects);
+    typedef BOOL (WINAPI * PFNWGLDXUNLOCKOBJECTSPROC) (HANDLE hDevice, GLint count, HANDLE* hObjects);
+    PFNWGLDXUNLOCKOBJECTSPROC fDXUnlockObjects;
+
+    bool EnsureInitialized();
+    HWND CreateDummyWindow(HDC* aWindowDC = nullptr);
+
+    bool HasRobustness() const { return mHasRobustness; }
+    bool HasDXInterop() const { return mHasDXInterop; }
+    bool HasDXInterop2() const { return mHasDXInterop2; }
+    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;
+    bool mHasDXInterop;
+    bool mHasDXInterop2;
+
+    HWND mWindow;
+    HDC mWindowDC;
+    HGLRC mWindowGLContext;
+    int mWindowPixelFormat;
+
+};
+
+// a global WGLLibrary instance
+extern WGLLibrary sWGLLib;
+
+} /* namespace gl */
+} /* namespace mozilla */