diff --git a/scene_opengl.cpp b/scene_opengl.cpp
index 9ac8b3bef8..243aae0ac2 100644
--- a/scene_opengl.cpp
+++ b/scene_opengl.cpp
@@ -998,36 +998,6 @@ GLTexture *SceneOpenGL::Window::getDecorationTexture() const
     return texture;
 }
 
-void SceneOpenGL::Window::renderQuads(int, const QRegion& region, const WindowQuadList& quads,
-                                      GLTexture *tex, bool normalized)
-{
-    if (quads.isEmpty())
-        return;
-
-    const QMatrix4x4 matrix = tex->matrix(normalized ? NormalizedCoordinates : UnnormalizedCoordinates);
-
-    // Render geometry
-    GLenum primitiveType;
-    int primcount;
-
-    if (GLVertexBuffer::supportsIndexedQuads()) {
-        primitiveType = GL_QUADS;
-        primcount = quads.count() * 4;
-    } else {
-        primitiveType = GL_TRIANGLES;
-        primcount = quads.count() * 6;
-    }
-
-    GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
-    vbo->setVertexCount(primcount);
-
-    GLVertex2D *map = (GLVertex2D *) vbo->map(primcount * sizeof(GLVertex2D));
-    quads.makeInterleavedArrays(primitiveType, map, matrix);
-    vbo->unmap();
-
-    vbo->render(region, primitiveType, m_hardwareClipping);
-}
-
 WindowPixmap* SceneOpenGL::Window::createWindowPixmap()
 {
     return new OpenGLWindowPixmap(this, m_scene);
diff --git a/scene_opengl.h b/scene_opengl.h
index ff406b4194..fb10c45a7f 100644
--- a/scene_opengl.h
+++ b/scene_opengl.h
@@ -209,16 +209,6 @@ protected:
 
     QMatrix4x4 transformation(int mask, const WindowPaintData &data) const;
     GLTexture *getDecorationTexture() const;
-    void renderQuads(int, const QRegion& region, const WindowQuadList& quads, GLTexture* tex, bool normalized);
-    /**
-     * @brief Prepare the OpenGL rendering state before the texture with @p type will be rendered.
-     *
-     * @param type The type of the Texture which will be rendered
-     * @param opacity The opacity value to use for this rendering
-     * @param brightness The brightness value to use for this rendering
-     * @param saturation The saturation value to use for this rendering
-     * @param screen The index of the screen to use for this rendering
-     **/
     virtual void prepareStates(TextureType type, qreal opacity, qreal brightness, qreal saturation, int screen) = 0;
     /**
      * @brief Restores the OpenGL rendering state after the texture with @p type has been rendered.