From 818a936e99e8a2d42d41f09df6fda8cd3f6a6884 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Fri, 29 Apr 2011 16:33:23 +0200
Subject: [PATCH] Only use GLSL blur shader if ShaderManager is valid

---
 effects/blur/blurshader.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/effects/blur/blurshader.cpp b/effects/blur/blurshader.cpp
index 5e0da02e19..6bbabe28d6 100644
--- a/effects/blur/blurshader.cpp
+++ b/effects/blur/blurshader.cpp
@@ -129,6 +129,8 @@ bool GLSLBlurShader::supported()
 {
     if (!GLPlatform::instance()->supports(GLSL))
         return false;
+    if (!ShaderManager::instance()->isValid())
+        return false;
 
     (void) glGetError(); // Clear the error state