From 194e22dbbec466fcaa4d419e6c33773b7474414b Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@elmindreda.org>
Date: Wed, 26 Jun 2013 13:57:09 +0200
Subject: [PATCH] Fixed retrieval of OpenGL 1.0 and 1.1 on WGL.

---
 README.md          |  2 ++
 src/wgl_context.c  | 16 +++++++++++++++-
 src/wgl_platform.h |  9 +++++++--
 3 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index f31850ad..7ad77274 100644
--- a/README.md
+++ b/README.md
@@ -102,6 +102,8 @@ See the [GLFW 3.0 documentation](http://www.glfw.org/docs/3.0/).
  - Bugfix: The `-Wall` flag was not used with Clang and other GCC compatibles
  - Bugfix: The default for `GLFW_ALPHA_BITS` was set to zero
  - [Win32] Bugfix: The clipboard string was not freed on terminate
+ - [Win32] Bugfix: Entry points for OpenGL 1.0 and 1.1 functions were not
+                   returned by `glfwGetProcAddress`
  - [Cocoa] Bugfix: The clipboard string was not freed on terminate
  - [X11] Bugfix: Override-redirect windows were resized to the desired instead
                  of the actual resolution of the selected video mode
diff --git a/src/wgl_context.c b/src/wgl_context.c
index 61d9a22e..943ff88e 100644
--- a/src/wgl_context.c
+++ b/src/wgl_context.c
@@ -297,6 +297,13 @@ static GLboolean choosePixelFormat(_GLFWwindow* window,
 //
 int _glfwInitContextAPI(void)
 {
+    _glfw.wgl.opengl32.instance = LoadLibrary(L"opengl32.dll");
+    if (!_glfw.wgl.opengl32.instance)
+    {
+        _glfwInputError(GLFW_PLATFORM_ERROR, "Failed to load opengl32.dll");
+        return GL_FALSE;
+    }
+
     _glfw.wgl.current = TlsAlloc();
     if (_glfw.wgl.current == TLS_OUT_OF_INDEXES)
     {
@@ -316,6 +323,9 @@ void _glfwTerminateContextAPI(void)
 {
     if (_glfw.wgl.hasTLS)
         TlsFree(_glfw.wgl.current);
+
+    if (_glfw.wgl.opengl32.instance)
+        FreeLibrary(_glfw.wgl.opengl32.instance);
 }
 
 #define setWGLattrib(attribName, attribValue) \
@@ -632,7 +642,11 @@ int _glfwPlatformExtensionSupported(const char* extension)
 
 GLFWglproc _glfwPlatformGetProcAddress(const char* procname)
 {
-    return (GLFWglproc) wglGetProcAddress(procname);
+    const GLFWglproc proc = (GLFWglproc) wglGetProcAddress(procname);
+    if (proc)
+        return proc;
+
+    return (GLFWglproc) GetProcAddress(_glfw.wgl.opengl32.instance, procname);
 }
 
 
diff --git a/src/wgl_platform.h b/src/wgl_platform.h
index 1472b98a..be000f88 100644
--- a/src/wgl_platform.h
+++ b/src/wgl_platform.h
@@ -77,8 +77,13 @@ typedef struct _GLFWcontextWGL
 //------------------------------------------------------------------------
 typedef struct _GLFWlibraryWGL
 {
-    GLboolean   hasTLS;
-    DWORD       current;
+    GLboolean       hasTLS;
+    DWORD           current;
+
+    // opengl32.dll
+    struct {
+        HINSTANCE   instance;
+    } opengl32;
 
 } _GLFWlibraryWGL;