diff -r 000000000000 -r 1918ee327afb examples/effects/customshader/customshadereffect.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/effects/customshader/customshadereffect.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "customshadereffect.h"
+#include <QGLShaderProgram>
+
+static char const colorizeShaderCode[] =
+    "uniform lowp vec4 effectColor;\n"
+    "mediump vec4 customShader(lowp sampler2D imageTexture, highp vec2 textureCoords) {\n"
+    "    vec4 src = texture2D(imageTexture, textureCoords);\n"
+    "    float gray = dot(src.rgb, vec3(0.212671, 0.715160, 0.072169));\n"
+    "    vec4 colorize = 1.0-((1.0-gray)*(1.0-effectColor));\n"
+    "    return vec4(colorize.rgb * src.a, src.a);\n"
+    "}";
+
+CustomShaderEffect::CustomShaderEffect()
+    : QGraphicsShaderEffect(),
+      color(Qt::red)
+{
+    setPixelShaderFragment(colorizeShaderCode);
+}
+
+void CustomShaderEffect::setEffectColor(const QColor& c)
+{
+    color = c;
+    setUniformsDirty();
+}
+
+void CustomShaderEffect::setUniforms(QGLShaderProgram *program)
+{
+    program->setUniformValue("effectColor", color);
+}