diff --git a/effects/backgroundcontrast/contrast.cpp b/effects/backgroundcontrast/contrast.cpp
index 932cb14bc9..2d8d7485bf 100644
--- a/effects/backgroundcontrast/contrast.cpp
+++ b/effects/backgroundcontrast/contrast.cpp
@@ -74,11 +74,6 @@ void ContrastEffect::reconfigure(ReconfigureFlags flags)
 {
     Q_UNUSED(flags)
 
-    ContrastConfig::self()->readConfig();
-    int strength = 4;
-    if (shader)
-        shader->setStrength(strength);
-
     if (!shader || !shader->isValid())
         XDeleteProperty(display(), rootWindow(), net_wm_contrast_region);
 }
@@ -136,7 +131,7 @@ bool ContrastEffect::enabledByDefault()
 
 bool ContrastEffect::supported()
 {
-    bool supported = GLRenderTarget::supported() && GLTexture::NPOTTextureSupported() && GLSLContrastShader::supported();
+    bool supported = GLRenderTarget::supported() && GLTexture::NPOTTextureSupported() && ContrastShader::supported();
 
     if (supported) {
         int maxTexSize;
diff --git a/effects/backgroundcontrast/contrastshader.cpp b/effects/backgroundcontrast/contrastshader.cpp
index 5f81df5c5a..a2968ee820 100644
--- a/effects/backgroundcontrast/contrastshader.cpp
+++ b/effects/backgroundcontrast/contrastshader.cpp
@@ -34,48 +34,28 @@ using namespace KWin;
 
 
 ContrastShader::ContrastShader()
-    : mStrength(0), mValid(false)
+    : shader(NULL), mValid(false)
 {
 }
 
 ContrastShader::~ContrastShader()
 {
+    reset();
 }
 
 ContrastShader *ContrastShader::create()
 {
-    if (GLSLContrastShader::supported())
-        return new GLSLContrastShader();
+    if (ContrastShader::supported()) {
+        ContrastShader *s = new ContrastShader();
+        s->reset();
+        s->init();
+        return s;
+    }
 
     return NULL;
 }
 
-void ContrastShader::setStrength(int radius)
-{
-    const int r = qMax(radius, 2);
-
-    if (mStrength != r) {
-        mStrength = r;
-        reset();
-        init();
-    }
-}
-
-// ----------------------------------------------------------------------------
-
-
-
-GLSLContrastShader::GLSLContrastShader()
-    : ContrastShader(), shader(NULL)
-{
-}
-
-GLSLContrastShader::~GLSLContrastShader()
-{
-    reset();
-}
-
-void GLSLContrastShader::reset()
+void ContrastShader::reset()
 {
     delete shader;
     shader = NULL;
@@ -83,7 +63,7 @@ void GLSLContrastShader::reset()
     setIsValid(false);
 }
 
-bool GLSLContrastShader::supported()
+bool ContrastShader::supported()
 {
     if (!GLPlatform::instance()->supports(GLSL))
         return false;
@@ -115,7 +95,7 @@ bool GLSLContrastShader::supported()
     return true;
 }
 
-void GLSLContrastShader::setColorMatrix(const QMatrix4x4 &matrix)
+void ContrastShader::setColorMatrix(const QMatrix4x4 &matrix)
 {
     if (!isValid())
         return;
@@ -125,7 +105,7 @@ void GLSLContrastShader::setColorMatrix(const QMatrix4x4 &matrix)
     ShaderManager::instance()->popShader();
 }
 
-void GLSLContrastShader::setTextureMatrix(const QMatrix4x4 &matrix)
+void ContrastShader::setTextureMatrix(const QMatrix4x4 &matrix)
 {
     if (!isValid())
         return;
@@ -133,7 +113,7 @@ void GLSLContrastShader::setTextureMatrix(const QMatrix4x4 &matrix)
     shader->setUniform(textureMatrixLocation, matrix);
 }
 
-void GLSLContrastShader::setModelViewProjectionMatrix(const QMatrix4x4 &matrix)
+void ContrastShader::setModelViewProjectionMatrix(const QMatrix4x4 &matrix)
 {
     if (!isValid())
         return;
@@ -141,7 +121,7 @@ void GLSLContrastShader::setModelViewProjectionMatrix(const QMatrix4x4 &matrix)
     shader->setUniform(mvpMatrixLocation, matrix);
 }
 
-void GLSLContrastShader::bind()
+void ContrastShader::bind()
 {
     if (!isValid())
         return;
@@ -149,12 +129,12 @@ void GLSLContrastShader::bind()
     ShaderManager::instance()->pushShader(shader);
 }
 
-void GLSLContrastShader::unbind()
+void ContrastShader::unbind()
 {
     ShaderManager::instance()->popShader();
 }
 
-void GLSLContrastShader::init()
+void ContrastShader::init()
 {
 
 
diff --git a/effects/backgroundcontrast/contrastshader.h b/effects/backgroundcontrast/contrastshader.h
index 525b2916a2..5fa863ce31 100644
--- a/effects/backgroundcontrast/contrastshader.h
+++ b/effects/backgroundcontrast/contrastshader.h
@@ -39,57 +39,25 @@ public:
         return mValid;
     }
 
-    // Sets the radius in pixels
-    void setStrength(int strength);
-    int strength() const {
-        return mStrength;
-    }
-    
-    virtual void setColorMatrix(const QMatrix4x4 &matrix) = 0;
+    void setColorMatrix(const QMatrix4x4 &matrix);
 
-    virtual void setTextureMatrix(const QMatrix4x4 &matrix) = 0;
-    virtual void setModelViewProjectionMatrix(const QMatrix4x4 &matrix) = 0;
-
-    virtual void bind() = 0;
-    virtual void unbind() = 0;
-
-protected:
-    float gaussian(float x, float sigma) const;
-    void setIsValid(bool value) {
-        mValid = value;
-    }
-    virtual void init() = 0;
-    virtual void reset() = 0;
-
-private:
-    int mStrength;
-    bool mValid;
-};
-
-
-// ----------------------------------------------------------------------------
-
-
-
-class GLSLContrastShader : public ContrastShader
-{
-public:
-    GLSLContrastShader();
-    ~GLSLContrastShader();
+    void setTextureMatrix(const QMatrix4x4 &matrix);
+    void setModelViewProjectionMatrix(const QMatrix4x4 &matrix);
 
     void bind();
     void unbind();
-    void setColorMatrix(const QMatrix4x4 &matrix);
-    void setTextureMatrix(const QMatrix4x4 &matrix);
-    void setModelViewProjectionMatrix(const QMatrix4x4 &matrix);
 
     static bool supported();
 
 protected:
-    void init();
-    void reset();
+    void setIsValid(bool value) {
+        mValid = value;
+    }
+    virtual void init();
+    virtual void reset();
 
 private:
+    bool mValid;
     GLShader *shader;
     int mvpMatrixLocation;
     int textureMatrixLocation;