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+/****************************************************************************
+**
+** Copyright (C) 2010 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 Mobility Components.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PAINTER_H
+#define PAINTER_H
+
+#include <QtOpenGL/qgl.h>
+#include <QtGui/qmatrix4x4.h>
+
+class Light;
+class LightModel;
+class Material;
+class QGLShaderProgram;
+
+class Painter
+{
+public:
+    Painter() : light(0), lightModel(0) {}
+    virtual ~Painter() {}
+
+    virtual void setMatrices(const QMatrix4x4 &mv, const QMatrix4x4 &proj) = 0;
+    virtual void selectMaterial(Material *material) = 0;
+    virtual void selectTexturedMaterial(Material *material) = 0;
+    virtual void setVertices(const float *array, int stride) = 0;
+    virtual void setTexCoords(const float *array, int stride) = 0;
+    virtual void setNormals(const float *array, int stride) = 0;
+
+    void drawQuad(const QVector3D &c1, const QVector3D &c2,
+                  const QVector3D &c3, const QVector3D &c4,
+                  const QVector3D &normal);
+
+    void setLight(Light *value) { light = value; }
+    void setLightModel(LightModel *value) { lightModel = value; }
+
+protected:
+    Light *light;
+    LightModel *lightModel;
+};
+
+class FixedFunctionPainter : public Painter
+{
+public:
+    FixedFunctionPainter();
+
+    void setMatrices(const QMatrix4x4 &mv, const QMatrix4x4 &proj);
+    void selectMaterial(Material *material);
+    void selectTexturedMaterial(Material *material);
+    void setVertices(const float *array, int stride);
+    void setTexCoords(const float *array, int stride);
+    void setNormals(const float *array, int stride);
+};
+
+class ShaderPainter : public Painter
+{
+public:
+    ShaderPainter();
+    ~ShaderPainter();
+
+    void setMatrices(const QMatrix4x4 &mv, const QMatrix4x4 &proj);
+    void selectMaterial(Material *material);
+    void selectTexturedMaterial(Material *material);
+    void setVertices(const float *array, int stride);
+    void setTexCoords(const float *array, int stride);
+    void setNormals(const float *array, int stride);
+
+private:
+    QGLShaderProgram *materialProgram;
+    QGLShaderProgram *textureProgram;
+    QGLShaderProgram *currentProgram;
+    QMatrix4x4 combinedMatrix;
+    QMatrix4x4 modelViewMatrix;
+    QMatrix3x3 normalMatrix;
+    bool matricesChanged;
+
+    void updateMaterials(QGLShaderProgram *program, Material *material);
+};
+
+#endif