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# glshaders.h Example File
demos/boxes/glshaders.h

     /****************************************************************************
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     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
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     #ifndef GLSHADERS_H
     #define GLSHADERS_H

     //#include <GL/glew.h>
     #include "glextensions.h"

     #include <QtGui>
     #include <QtOpenGL>

     #include "vector.h"

     class GLShader
     {
     public:
         friend class GLProgram;
         virtual ~GLShader();
         bool failed() const {return m_failed;}
         QString log();
     protected:
         GLShader(const char *data, int size, GLenum shaderType);
         GLShader(const QString& fileName, GLenum shaderType);

         GLhandleARB m_shader;
         bool m_compileError;
         bool m_failed;
     };

     class GLVertexShader : public GLShader
     {
     public:
         GLVertexShader(const char *data, int size);
         GLVertexShader(const QString& fileName);
     };

     class GLFragmentShader : public GLShader
     {
     public:
         GLFragmentShader(const char *data, int size);
         GLFragmentShader(const QString& fileName);
     };

     class GLProgram
     {
     public:
         GLProgram();
         ~GLProgram();
         void attach(const GLShader &shader);
         void detach(const GLShader &shader);
         void bind();
         void unbind();
         bool failed();
         QString log();
         bool hasParameter(const QString& name);
         // use program before setting values
         void setInt(const QString& name, int value);
         void setFloat(const QString& name, float value);
         void setColor(const QString& name, QRgb value);
         void setMatrix(const QString& name, const gfx::Matrix4x4f &mat);
         // TODO: add a bunch of set-functions for different types.
     private:
         GLhandleARB m_program;
         bool m_linked;
         bool m_linkError;
         bool m_failed;
     };

     #endif