From ed98e06651a932f45438e9c790f18a12caeb8524 Mon Sep 17 00:00:00 2001
From: Camilla Berglund <elmindreda@elmindreda.org>
Date: Wed, 4 Dec 2013 05:35:36 +0100
Subject: [PATCH] Clarified WGL missing OpenGL error.

---
 src/wgl_context.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/wgl_context.c b/src/wgl_context.c
index ccd7f574..6e7d5030 100644
--- a/src/wgl_context.c
+++ b/src/wgl_context.c
@@ -272,9 +272,21 @@ static GLboolean choosePixelFormat(_GLFWwindow* window,
         usableCount++;
     }
 
+    if (!usableCount)
+    {
+        _glfwInputError(GLFW_API_UNAVAILABLE,
+                        "WGL: The driver does not appear to support OpenGL");
+
+        free(usableConfigs);
+        return GL_FALSE;
+    }
+
     closest = _glfwChooseFBConfig(desired, usableConfigs, usableCount);
     if (!closest)
     {
+        _glfwInputError(GLFW_PLATFORM_ERROR,
+                        "WGL: Failed to find a suitable pixel format");
+
         free(usableConfigs);
         return GL_FALSE;
     }
@@ -355,11 +367,7 @@ int _glfwCreateContext(_GLFWwindow* window,
     }
 
     if (!choosePixelFormat(window, fbconfig, &pixelFormat))
-    {
-        _glfwInputError(GLFW_PLATFORM_ERROR,
-                        "WGL: Failed to find a suitable pixel format");
         return GL_FALSE;
-    }
 
     if (!DescribePixelFormat(window->wgl.dc, pixelFormat, sizeof(pfd), &pfd))
     {