From a3ab6efa23a2e5ddd779cc485eb204fec8cfac29 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lukas=20D=C3=BCrrenberger?= <eXpl0it3r@my-gate.net>
Date: Fri, 23 May 2014 10:43:51 +0200
Subject: [PATCH] Fix application crash when calling Shader::isAvailable()
 #608.

---
 src/SFML/Graphics/RenderTarget.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/SFML/Graphics/RenderTarget.cpp b/src/SFML/Graphics/RenderTarget.cpp
index e7ee1471..c21668e6 100644
--- a/src/SFML/Graphics/RenderTarget.cpp
+++ b/src/SFML/Graphics/RenderTarget.cpp
@@ -340,6 +340,9 @@ void RenderTarget::popGLStates()
 ////////////////////////////////////////////////////////////
 void RenderTarget::resetGLStates()
 {
+    // Check here to make sure a context change does not happen after activate(true)
+    bool shaderAvailable = Shader::isAvailable();
+
     if (activate(true))
     {
         // Make sure that extensions are initialized
@@ -362,7 +365,7 @@ void RenderTarget::resetGLStates()
         applyBlendMode(BlendAlpha);
         applyTransform(Transform::Identity);
         applyTexture(NULL);
-        if (Shader::isAvailable())
+        if (shaderAvailable)
             applyShader(NULL);
         m_cache.useVertexCache = false;