From 728f333e6a176f87659d4cc5442a6baf173c95fb 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 16:39:15 +0200
Subject: [PATCH] Only use GLSL shader for lanczosfilter if ShaderManager is
 valid

---
 lanczosfilter.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lanczosfilter.cpp b/lanczosfilter.cpp
index cbd0af5128..8affdb05ea 100644
--- a/lanczosfilter.cpp
+++ b/lanczosfilter.cpp
@@ -604,6 +604,7 @@ bool LanczosShader::init()
 {
     GLPlatform *gl = GLPlatform::instance();
     if (gl->supports(GLSL) &&
+            ShaderManager::instance()->isValid() &&
             GLRenderTarget::supported() &&
             !(gl->isRadeon() && gl->chipClass() < R600)) {
         m_shader = ShaderManager::instance()->loadFragmentShader(ShaderManager::SimpleShader, ":/resources/lanczos-fragment.glsl");