/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
 * Copyright (C) 2003-2005 3Dlabs Inc. Ltd.
 * Copyright (C) 2008 Zebra Imaging
 * Copyright (C) 2012 David Callu
 *
 * This application is open source and may be redistributed and/or modified
 * freely and without restriction, both in commercial and non commercial
 * applications, as long as this copyright notice is maintained.
 *
 * This application is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/

/* file:   include/osg/Uniform
 * author: Mike Weiblen 2008-01-02
*/

#ifndef OSG_UNIFORM
#define OSG_UNIFORM 1

#include <osg/UniformBase>

#include <osg/Array>
#include <osg/Callback>
#include <osg/Vec2>
#include <osg/Vec3>
#include <osg/Vec4>
#include <osg/Vec2i>
#include <osg/Vec3i>
#include <osg/Vec4i>
#include <osg/Vec2ui>
#include <osg/Vec3ui>
#include <osg/Vec4ui>
#include <osg/Vec2d>
#include <osg/Vec3d>
#include <osg/Vec4d>
#include <osg/Plane>
#include <osg/GLExtensions>

namespace osg {

template< typename T >
struct UniformClassNameTrait
{
    static const char* className() { return "TemplateUniform"; }
};

template<typename T>
class TemplateUniform : public osg::UniformBase
{
    public:

        typedef T value_type;

        TemplateUniform() {}

        TemplateUniform(const std::string& name) : osg::UniformBase(name) {}

        TemplateUniform(const value_type& value) : _value(value) {}

        TemplateUniform(const std::string& name, const value_type& value) : osg::UniformBase(name), _value(value) {}

        TemplateUniform(const TemplateUniform& rhs, const osg::CopyOp copyop=osg::CopyOp::SHALLOW_COPY) :
            osg::UniformBase(rhs,copyop),
            _value(rhs._value) {}

        virtual Object* cloneType() const { return new TemplateUniform(); }
        virtual Object* clone(const CopyOp& copyop) const { return new TemplateUniform(*this, copyop); }
        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const TemplateUniform*>(obj)!=NULL; }
        virtual const char* libraryName() const { return "osg"; }
        virtual const char* className() const { return UniformClassNameTrait<T>::className(); }

        virtual void apply(const osg::GLExtensions* ext, GLint location) const
        {
            ext->glUniform(location, _value);
        }

        void setValue(const value_type& value) { if (_value!=value) { _value = value; dirty(); } }
        value_type& getValue() { return _value; }
        const value_type& getValue() const { return _value; }

    protected:

        value_type _value;
};

#define META_Uniform(TYPE,NAME) \
    template<> struct UniformClassNameTrait<TYPE> { static const char* className() { return #NAME; } }; \
    typedef TemplateUniform<TYPE> NAME;

META_Uniform(int, IntUniform)
META_Uniform(unsigned int, UIntUniform)
META_Uniform(float, FloatUniform)
META_Uniform(double, DoubleUniform)
META_Uniform(osg::Vec2i, Vec2iUniform)
META_Uniform(osg::Vec3i, Vec3iUniform)
META_Uniform(osg::Vec4i, Vec4iUniform)
META_Uniform(osg::Vec2ui, Vec2uiUniform)
META_Uniform(osg::Vec3ui, Vec3uiUniform)
META_Uniform(osg::Vec4ui, Vec4uiUniform)
META_Uniform(osg::Vec2, Vec2Uniform)
META_Uniform(osg::Vec3, Vec3Uniform)
META_Uniform(osg::Vec4, Vec4Uniform)
META_Uniform(osg::Vec2d, Vec2dUniform)
META_Uniform(osg::Vec3d, Vec3dUniform)
META_Uniform(osg::Vec4d, Vec4dUniform)
META_Uniform(osg::Plane, PlaneUniform)
META_Uniform(osg::Matrixf, MatrixfUniform)
META_Uniform(osg::Matrixd, MatrixdUniform)


template< typename T >
struct ArrayUniformClassNameTrait
{
    static const char* className() { return "TemplateArrayUniform"; }
};

template<typename T>
class TemplateArrayUniform : public osg::UniformBase
{
    public:

        typedef T value_type;
        typedef std::vector<value_type> array_type;

        TemplateArrayUniform() {}

        TemplateArrayUniform(const std::string& name) : osg::UniformBase(name) {}

        TemplateArrayUniform(const std::string& name, unsigned int new_size) : osg::UniformBase(name), _array(new_size) {}

        TemplateArrayUniform(const TemplateArrayUniform& rhs, const osg::CopyOp copyop=osg::CopyOp::SHALLOW_COPY) :
            osg::UniformBase(rhs,copyop),
            _array(rhs._array) {}

        virtual Object* cloneType() const { return new TemplateArrayUniform(); }
        virtual Object* clone(const CopyOp& copyop) const { return new TemplateArrayUniform(*this, copyop); }
        virtual bool isSameKindAs(const Object* obj) const { return dynamic_cast<const TemplateArrayUniform*>(obj)!=NULL; }
        virtual const char* libraryName() const { return "osg"; }
        virtual const char* className() const { return ArrayUniformClassNameTrait<T>::className(); }

        virtual void apply(const osg::GLExtensions* ext, GLint location) const
        {
            ext->glUniform(location, _array);
        }

        bool empty() const { return _array.empty(); }

        void resize(unsigned int new_size) { _array.resize(new_size); }

        unsigned int size() const { return static_cast<unsigned int>(_array.size()); }

        void setElement(unsigned int i, const value_type& value) { if (_array[i]!=value) { _array[i] = value; dirty(); } }
        value_type& getElement(unsigned int i) { return _array[i]; }
        const value_type& getElement(unsigned int i) const { return _array[i]; }

        void setArray(const array_type& array) { if (_array!=array) { _array = array; dirty(); } }
        array_type& getArray() { return _array; }
        const array_type& getArray() const { return _array; }

    protected:

        array_type _array;
};

#define META_ArrayUniform(TYPE,NAME) \
    template<> struct ArrayUniformClassNameTrait<TYPE> { static const char* className() { return #NAME; } }; \
    typedef TemplateArrayUniform<TYPE> NAME;

META_ArrayUniform(int, IntArrayUniform)
META_ArrayUniform(unsigned int, UIntArrayUniform)
META_ArrayUniform(float, FloatArrayUniform)
META_ArrayUniform(double, DoubleArrayUniform)
META_ArrayUniform(osg::Vec2, Vec2ArrayUniform)
META_ArrayUniform(osg::Vec3, Vec3ArrayUniform)
META_ArrayUniform(osg::Vec4, Vec4ArrayUniform)
META_ArrayUniform(osg::Vec2d, Vec2dArrayUniform)
META_ArrayUniform(osg::Vec3d, Vec3dArrayUniform)
META_ArrayUniform(osg::Vec4d, Vec4dArrayUniform)
META_ArrayUniform(osg::Vec2i, Vec2iArrayUniform)
META_ArrayUniform(osg::Vec3i, Vec3iArrayUniform)
META_ArrayUniform(osg::Vec4i, Vec4iArrayUniform)
META_ArrayUniform(osg::Vec2ui, Vec2uiArrayUniform)
META_ArrayUniform(osg::Vec3ui, Vec3uiArrayUniform)
META_ArrayUniform(osg::Vec4ui, Vec4uiArrayUniform)
META_ArrayUniform(osg::Matrixf, MatrixfArrayUniform)
META_ArrayUniform(osg::Matrixd, MatrixdArrayUniform)


/** Deprecated Uniform provides backwards compatibility. */
class OSG_EXPORT Uniform : public UniformBase
{
    public:
        enum Type {
            FLOAT      = GL_FLOAT,
            FLOAT_VEC2 = GL_FLOAT_VEC2,
            FLOAT_VEC3 = GL_FLOAT_VEC3,
            FLOAT_VEC4 = GL_FLOAT_VEC4,

            DOUBLE      = GL_DOUBLE,
            DOUBLE_VEC2 = GL_DOUBLE_VEC2,
            DOUBLE_VEC3 = GL_DOUBLE_VEC3,
            DOUBLE_VEC4 = GL_DOUBLE_VEC4,

            INT      = GL_INT,
            INT_VEC2 = GL_INT_VEC2,
            INT_VEC3 = GL_INT_VEC3,
            INT_VEC4 = GL_INT_VEC4,

            UNSIGNED_INT      = GL_UNSIGNED_INT,
            UNSIGNED_INT_VEC2 = GL_UNSIGNED_INT_VEC2_EXT,
            UNSIGNED_INT_VEC3 = GL_UNSIGNED_INT_VEC3_EXT,
            UNSIGNED_INT_VEC4 = GL_UNSIGNED_INT_VEC4_EXT,

            BOOL      = GL_BOOL,
            BOOL_VEC2 = GL_BOOL_VEC2,
            BOOL_VEC3 = GL_BOOL_VEC3,
            BOOL_VEC4 = GL_BOOL_VEC4,

            INT64            = GL_INT64_ARB,
            UNSIGNED_INT64   = GL_UNSIGNED_INT64_ARB,

            FLOAT_MAT2   = GL_FLOAT_MAT2,
            FLOAT_MAT3   = GL_FLOAT_MAT3,
            FLOAT_MAT4   = GL_FLOAT_MAT4,
            FLOAT_MAT2x3 = GL_FLOAT_MAT2x3,
            FLOAT_MAT2x4 = GL_FLOAT_MAT2x4,
            FLOAT_MAT3x2 = GL_FLOAT_MAT3x2,
            FLOAT_MAT3x4 = GL_FLOAT_MAT3x4,
            FLOAT_MAT4x2 = GL_FLOAT_MAT4x2,
            FLOAT_MAT4x3 = GL_FLOAT_MAT4x3,

            DOUBLE_MAT2   = GL_DOUBLE_MAT2,
            DOUBLE_MAT3   = GL_DOUBLE_MAT3,
            DOUBLE_MAT4   = GL_DOUBLE_MAT4,
            DOUBLE_MAT2x3 = GL_DOUBLE_MAT2x3,
            DOUBLE_MAT2x4 = GL_DOUBLE_MAT2x4,
            DOUBLE_MAT3x2 = GL_DOUBLE_MAT3x2,
            DOUBLE_MAT3x4 = GL_DOUBLE_MAT3x4,
            DOUBLE_MAT4x2 = GL_DOUBLE_MAT4x2,
            DOUBLE_MAT4x3 = GL_DOUBLE_MAT4x3,

            SAMPLER_1D                    = GL_SAMPLER_1D,
            SAMPLER_2D                    = GL_SAMPLER_2D,
            SAMPLER_3D                    = GL_SAMPLER_3D,
            SAMPLER_CUBE                  = GL_SAMPLER_CUBE,
            SAMPLER_1D_SHADOW             = GL_SAMPLER_1D_SHADOW,
            SAMPLER_2D_SHADOW             = GL_SAMPLER_2D_SHADOW,
            SAMPLER_1D_ARRAY              = GL_SAMPLER_1D_ARRAY_EXT,
            SAMPLER_2D_ARRAY              = GL_SAMPLER_2D_ARRAY_EXT,
            SAMPLER_CUBE_MAP_ARRAY        = GL_SAMPLER_CUBE_MAP_ARRAY,
            SAMPLER_1D_ARRAY_SHADOW       = GL_SAMPLER_1D_ARRAY_SHADOW_EXT,
            SAMPLER_2D_ARRAY_SHADOW       = GL_SAMPLER_2D_ARRAY_SHADOW_EXT,
            SAMPLER_2D_MULTISAMPLE        = GL_SAMPLER_2D_MULTISAMPLE,
            SAMPLER_2D_MULTISAMPLE_ARRAY  = GL_SAMPLER_2D_MULTISAMPLE_ARRAY,
            SAMPLER_CUBE_SHADOW           = GL_SAMPLER_CUBE_SHADOW_EXT,
            SAMPLER_CUBE_MAP_ARRAY_SHADOW = GL_SAMPLER_CUBE_MAP_ARRAY_SHADOW,
            SAMPLER_BUFFER                = GL_SAMPLER_BUFFER_EXT,
            SAMPLER_2D_RECT               = GL_SAMPLER_2D_RECT,
            SAMPLER_2D_RECT_SHADOW        = GL_SAMPLER_2D_RECT_SHADOW,

            INT_SAMPLER_1D                   = GL_INT_SAMPLER_1D_EXT,
            INT_SAMPLER_2D                   = GL_INT_SAMPLER_2D_EXT,
            INT_SAMPLER_3D                   = GL_INT_SAMPLER_3D_EXT,
            INT_SAMPLER_CUBE                 = GL_INT_SAMPLER_CUBE_EXT,
            INT_SAMPLER_1D_ARRAY             = GL_INT_SAMPLER_1D_ARRAY_EXT,
            INT_SAMPLER_2D_ARRAY             = GL_INT_SAMPLER_2D_ARRAY_EXT,
            INT_SAMPLER_CUBE_MAP_ARRAY       = GL_INT_SAMPLER_CUBE_MAP_ARRAY,
            INT_SAMPLER_2D_MULTISAMPLE       = GL_INT_SAMPLER_2D_MULTISAMPLE,
            INT_SAMPLER_2D_MULTISAMPLE_ARRAY = GL_INT_SAMPLER_2D_MULTISAMPLE_ARRAY,
            INT_SAMPLER_BUFFER               = GL_INT_SAMPLER_BUFFER_EXT,
            INT_SAMPLER_2D_RECT              = GL_INT_SAMPLER_2D_RECT_EXT,

            UNSIGNED_INT_SAMPLER_1D                   = GL_UNSIGNED_INT_SAMPLER_1D_EXT,
            UNSIGNED_INT_SAMPLER_2D                   = GL_UNSIGNED_INT_SAMPLER_2D_EXT,
            UNSIGNED_INT_SAMPLER_3D                   = GL_UNSIGNED_INT_SAMPLER_3D_EXT,
            UNSIGNED_INT_SAMPLER_CUBE                 = GL_UNSIGNED_INT_SAMPLER_CUBE_EXT,
            UNSIGNED_INT_SAMPLER_1D_ARRAY             = GL_UNSIGNED_INT_SAMPLER_1D_ARRAY_EXT,
            UNSIGNED_INT_SAMPLER_2D_ARRAY             = GL_UNSIGNED_INT_SAMPLER_2D_ARRAY_EXT,
            UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY       = GL_UNSIGNED_INT_SAMPLER_CUBE_MAP_ARRAY,
            UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE       = GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE,
            UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY = GL_UNSIGNED_INT_SAMPLER_2D_MULTISAMPLE_ARRAY,
            UNSIGNED_INT_SAMPLER_BUFFER               = GL_UNSIGNED_INT_SAMPLER_BUFFER_EXT,
            UNSIGNED_INT_SAMPLER_2D_RECT              = GL_UNSIGNED_INT_SAMPLER_2D_RECT_EXT,

            IMAGE_1D                   = GL_IMAGE_1D,
            IMAGE_2D                   = GL_IMAGE_2D,
            IMAGE_3D                   = GL_IMAGE_3D,
            IMAGE_2D_RECT              = GL_IMAGE_2D_RECT,
            IMAGE_CUBE                 = GL_IMAGE_CUBE,
            IMAGE_BUFFER               = GL_IMAGE_BUFFER,
            IMAGE_1D_ARRAY             = GL_IMAGE_1D_ARRAY,
            IMAGE_2D_ARRAY             = GL_IMAGE_2D_ARRAY,
            IMAGE_CUBE_MAP_ARRAY       = GL_IMAGE_CUBE_MAP_ARRAY,
            IMAGE_2D_MULTISAMPLE       = GL_IMAGE_2D_MULTISAMPLE,
            IMAGE_2D_MULTISAMPLE_ARRAY = GL_IMAGE_2D_MULTISAMPLE_ARRAY,

            INT_IMAGE_1D                   = GL_INT_IMAGE_1D,
            INT_IMAGE_2D                   = GL_INT_IMAGE_2D,
            INT_IMAGE_3D                   = GL_INT_IMAGE_3D,
            INT_IMAGE_2D_RECT              = GL_INT_IMAGE_2D_RECT,
            INT_IMAGE_CUBE                 = GL_INT_IMAGE_CUBE,
            INT_IMAGE_BUFFER               = GL_INT_IMAGE_BUFFER,
            INT_IMAGE_1D_ARRAY             = GL_INT_IMAGE_1D_ARRAY,
            INT_IMAGE_2D_ARRAY             = GL_INT_IMAGE_2D_ARRAY,
            INT_IMAGE_CUBE_MAP_ARRAY       = GL_INT_IMAGE_CUBE_MAP_ARRAY,
            INT_IMAGE_2D_MULTISAMPLE       = GL_INT_IMAGE_2D_MULTISAMPLE,
            INT_IMAGE_2D_MULTISAMPLE_ARRAY = GL_INT_IMAGE_2D_MULTISAMPLE_ARRAY,

            UNSIGNED_INT_IMAGE_1D                   = GL_UNSIGNED_INT_IMAGE_1D,
            UNSIGNED_INT_IMAGE_2D                   = GL_UNSIGNED_INT_IMAGE_2D,
            UNSIGNED_INT_IMAGE_3D                   = GL_UNSIGNED_INT_IMAGE_3D,
            UNSIGNED_INT_IMAGE_2D_RECT              = GL_UNSIGNED_INT_IMAGE_2D_RECT,
            UNSIGNED_INT_IMAGE_CUBE                 = GL_UNSIGNED_INT_IMAGE_CUBE,
            UNSIGNED_INT_IMAGE_BUFFER               = GL_UNSIGNED_INT_IMAGE_BUFFER,
            UNSIGNED_INT_IMAGE_1D_ARRAY             = GL_UNSIGNED_INT_IMAGE_1D_ARRAY,
            UNSIGNED_INT_IMAGE_2D_ARRAY             = GL_UNSIGNED_INT_IMAGE_2D_ARRAY,
            UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY       = GL_UNSIGNED_INT_IMAGE_CUBE_MAP_ARRAY,
            UNSIGNED_INT_IMAGE_2D_MULTISAMPLE       = GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE,
            UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY = GL_UNSIGNED_INT_IMAGE_2D_MULTISAMPLE_ARRAY,

            UNDEFINED = 0x0
        };

    public:

        Uniform();
        Uniform( Type type, const std::string& name, int numElements=1 );

        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
        Uniform(const Uniform& rhs, const CopyOp& copyop=CopyOp::SHALLOW_COPY);

        META_Object(osg, Uniform);

        /** Convert 'this' into a Uniform pointer if Object is a Uniform, otherwise return 0.
          * Equivalent to dynamic_cast<Uniform*>(this).*/
        virtual Uniform* asUniform() { return this; }

        /** convert 'const this' into a const Uniform pointer if Object is a Uniform, otherwise return 0.
          * Equivalent to dynamic_cast<const Uniform*>(this).*/
        virtual const Uniform* asUniform() const { return this; }


        /** Set the type of glUniform, ensuring it is only set once.*/
        virtual bool setType( Type t );

        /** Get the type of glUniform as enum. */
        Type getType() const { return _type; }


        /** Set the length of a uniform, ensuring it is only set once (1==scalar)*/
        void setNumElements( unsigned int numElements );

        /** Get the number of GLSL elements of the osg::Uniform (1==scalar) */
        unsigned int getNumElements() const { return _numElements; }

        /** Get the number of elements required for the internal data array.
          * Returns 0 if the osg::Uniform is not properly configured.  */
        unsigned int getInternalArrayNumElements() const;

        /** Return the name of a Type enum as string. */
        static const char* getTypename( Type t );

        /** Return the number of components for a GLSL type. */
        static int getTypeNumComponents( Type t );

        /** Return the Type enum of a Uniform typename string */
        static Uniform::Type getTypeId( const std::string& tname );

        /** Return the GL API type corresponding to a GLSL type */
        static Type getGlApiType( Type t );

        /** Return the internal data array type corresponding to a GLSL type */
        static GLenum getInternalArrayType( Type t );

        /** Return the number that the name maps to uniquely */
        static unsigned int getNameID(const std::string& name);

        /** convenient scalar (non-array) constructors w/ assignment */
        explicit Uniform( const char* name, float f );
        explicit Uniform( const char* name, double d );
        explicit Uniform( const char* name, int i );
        explicit Uniform( const char* name, unsigned int ui );
        explicit Uniform( const char* name, bool b );
        explicit Uniform( const char* name, unsigned long long ull);
        explicit Uniform( const char* name, long long ll );
        Uniform( const char* name, const osg::Vec2& v2 );
        Uniform( const char* name, const osg::Vec3& v3 );
        Uniform( const char* name, const osg::Vec4& v4 );
        Uniform( const char* name, const osg::Vec2d& v2 );
        Uniform( const char* name, const osg::Vec3d& v3 );
        Uniform( const char* name, const osg::Vec4d& v4 );
        Uniform( const char* name, const osg::Matrix2& m2 );
        Uniform( const char* name, const osg::Matrix3& m3 );
        Uniform( const char* name, const osg::Matrixf& m4 );
        Uniform( const char* name, const osg::Matrix2x3& m2x3 );
        Uniform( const char* name, const osg::Matrix2x4& m2x4 );
        Uniform( const char* name, const osg::Matrix3x2& m3x2 );
        Uniform( const char* name, const osg::Matrix3x4& m3x4 );
        Uniform( const char* name, const osg::Matrix4x2& m4x2 );
        Uniform( const char* name, const osg::Matrix4x3& m4x3 );
        Uniform( const char* name, const osg::Matrix2d& m2 );
        Uniform( const char* name, const osg::Matrix3d& m3 );
        Uniform( const char* name, const osg::Matrixd& m4 );
        Uniform( const char* name, const osg::Matrix2x3d& m2x3 );
        Uniform( const char* name, const osg::Matrix2x4d& m2x4 );
        Uniform( const char* name, const osg::Matrix3x2d& m3x2 );
        Uniform( const char* name, const osg::Matrix3x4d& m3x4 );
        Uniform( const char* name, const osg::Matrix4x2d& m4x2 );
        Uniform( const char* name, const osg::Matrix4x3d& m4x3 );
        Uniform( const char* name, int i0, int i1 );
        Uniform( const char* name, int i0, int i1, int i2 );
        Uniform( const char* name, int i0, int i1, int i2, int i3 );
        Uniform( const char* name, unsigned int ui0, unsigned int ui1 );
        Uniform( const char* name, unsigned int ui0, unsigned int ui1, unsigned int ui2 );
        Uniform( const char* name, unsigned int ui0, unsigned int ui1, unsigned int ui2, unsigned int ui3 );
        Uniform( const char* name, bool b0, bool b1 );
        Uniform( const char* name, bool b0, bool b1, bool b2 );
        Uniform( const char* name, bool b0, bool b1, bool b2, bool b3 );

        /** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
        virtual int compare(const UniformBase& rhs) const;
        virtual int compareData(const UniformBase& rhs) const;

        void copyData( const Uniform& rhs );

        /** convenient scalar (non-array) value assignment */
        bool set( float f );
        bool set( double d );
        bool set( int i );
        bool set( unsigned int ui );
        bool set( bool b );
        bool set( unsigned long long ull );
        bool set( long long ll );
        bool set( const osg::Vec2& v2 );
        bool set( const osg::Vec3& v3 );
        bool set( const osg::Vec4& v4 );
        bool set( const osg::Vec2d& v2 );
        bool set( const osg::Vec3d& v3 );
        bool set( const osg::Vec4d& v4 );
        bool set( const osg::Matrix2& m2 );
        bool set( const osg::Matrix3& m3 );
        bool set( const osg::Matrixf& m4 );
        bool set( const osg::Matrix2x3& m2x3 );
        bool set( const osg::Matrix2x4& m2x4 );
        bool set( const osg::Matrix3x2& m3x2 );
        bool set( const osg::Matrix3x4& m3x4 );
        bool set( const osg::Matrix4x2& m4x2 );
        bool set( const osg::Matrix4x3& m4x3 );
        bool set( const osg::Matrix2d& m2 );
        bool set( const osg::Matrix3d& m3 );
        bool set( const osg::Matrixd& m4 );
        bool set( const osg::Matrix2x3d& m2x3 );
        bool set( const osg::Matrix2x4d& m2x4 );
        bool set( const osg::Matrix3x2d& m3x2 );
        bool set( const osg::Matrix3x4d& m3x4 );
        bool set( const osg::Matrix4x2d& m4x2 );
        bool set( const osg::Matrix4x3d& m4x3 );
        bool set( int i0, int i1 );
        bool set( int i0, int i1, int i2 );
        bool set( int i0, int i1, int i2, int i3 );
        bool set( unsigned int ui0, unsigned int ui1 );
        bool set( unsigned int ui0, unsigned int ui1, unsigned int ui2 );
        bool set( unsigned int ui0, unsigned int ui1, unsigned int ui2, unsigned int ui3 );
        bool set( bool b0, bool b1 );
        bool set( bool b0, bool b1, bool b2 );
        bool set( bool b0, bool b1, bool b2, bool b3 );

        /** convenient scalar (non-array) value query */
        bool get( float& f ) const;
        bool get( double& d ) const;
        bool get( int& i ) const;
        bool get( unsigned int& ui ) const;
        bool get( bool& b ) const;
        bool get( unsigned long long & ull ) const;
        bool get( long long& ll ) const;
        bool get( osg::Vec2& v2 ) const;
        bool get( osg::Vec3& v3 ) const;
        bool get( osg::Vec4& v4 ) const;
        bool get( osg::Vec2d& v2 ) const;
        bool get( osg::Vec3d& v3 ) const;
        bool get( osg::Vec4d& v4 ) const;
        bool get( osg::Matrix2& m2 ) const;
        bool get( osg::Matrix3& m3 ) const;
        bool get( osg::Matrixf& m4 ) const;
        bool get( osg::Matrix2x3& m2x3 ) const;
        bool get( osg::Matrix2x4& m2x4 ) const;
        bool get( osg::Matrix3x2& m3x2 ) const;
        bool get( osg::Matrix3x4& m3x4 ) const;
        bool get( osg::Matrix4x2& m4x2 ) const;
        bool get( osg::Matrix4x3& m4x3 ) const;
        bool get( osg::Matrix2d& m2 ) const;
        bool get( osg::Matrix3d& m3 ) const;
        bool get( osg::Matrixd& m4 ) const;
        bool get( osg::Matrix2x3d& m2x3 ) const;
        bool get( osg::Matrix2x4d& m2x4 ) const;
        bool get( osg::Matrix3x2d& m3x2 ) const;
        bool get( osg::Matrix3x4d& m3x4 ) const;
        bool get( osg::Matrix4x2d& m4x2 ) const;
        bool get( osg::Matrix4x3d& m4x3 ) const;
        bool get( int& i0, int& i1 ) const;
        bool get( int& i0, int& i1, int& i2 ) const;
        bool get( int& i0, int& i1, int& i2, int& i3 ) const;
        bool get( unsigned int& ui0, unsigned int& ui1 ) const;
        bool get( unsigned int& ui0, unsigned int& ui1, unsigned int& ui2 ) const;
        bool get( unsigned int& ui0, unsigned int& ui1, unsigned int& ui2, unsigned int& ui3 ) const;
        bool get( bool& b0, bool& b1 ) const;
        bool get( bool& b0, bool& b1, bool& b2 ) const;
        bool get( bool& b0, bool& b1, bool& b2, bool& b3 ) const;

        /** value assignment for array uniforms */
        bool setElement( unsigned int index, float f );
        bool setElement( unsigned int index, double d );
        bool setElement( unsigned int index, int i );
        bool setElement( unsigned int index, unsigned int ui );
        bool setElement( unsigned int index, bool b );
        bool setElement( unsigned int index, unsigned long long  ull );
        bool setElement( unsigned int index, long long ll );
        bool setElement( unsigned int index, const osg::Vec2& v2 );
        bool setElement( unsigned int index, const osg::Vec3& v3 );
        bool setElement( unsigned int index, const osg::Vec4& v4 );
        bool setElement( unsigned int index, const osg::Vec2d& v2 );
        bool setElement( unsigned int index, const osg::Vec3d& v3 );
        bool setElement( unsigned int index, const osg::Vec4d& v4 );
        bool setElement( unsigned int index, const osg::Matrix2& m2 );
        bool setElement( unsigned int index, const osg::Matrix3& m3 );
        bool setElement( unsigned int index, const osg::Matrixf& m4 );
        bool setElement( unsigned int index, const osg::Matrix2x3& m2x3 );
        bool setElement( unsigned int index, const osg::Matrix2x4& m2x4 );
        bool setElement( unsigned int index, const osg::Matrix3x2& m3x2 );
        bool setElement( unsigned int index, const osg::Matrix3x4& m3x4 );
        bool setElement( unsigned int index, const osg::Matrix4x2& m4x2 );
        bool setElement( unsigned int index, const osg::Matrix4x3& m4x3 );
        bool setElement( unsigned int index, const osg::Matrix2d& m2 );
        bool setElement( unsigned int index, const osg::Matrix3d& m3 );
        bool setElement( unsigned int index, const osg::Matrixd& m4 );
        bool setElement( unsigned int index, const osg::Matrix2x3d& m2x3 );
        bool setElement( unsigned int index, const osg::Matrix2x4d& m2x4 );
        bool setElement( unsigned int index, const osg::Matrix3x2d& m3x2 );
        bool setElement( unsigned int index, const osg::Matrix3x4d& m3x4 );
        bool setElement( unsigned int index, const osg::Matrix4x2d& m4x2 );
        bool setElement( unsigned int index, const osg::Matrix4x3d& m4x3 );
        bool setElement( unsigned int index, int i0, int i1 );
        bool setElement( unsigned int index, int i0, int i1, int i2 );
        bool setElement( unsigned int index, int i0, int i1, int i2, int i3 );
        bool setElement( unsigned int index, unsigned int ui0, unsigned int ui1 );
        bool setElement( unsigned int index, unsigned int ui0, unsigned int ui1, unsigned int ui2 );
        bool setElement( unsigned int index, unsigned int ui0, unsigned int ui1, unsigned int ui2, unsigned int ui3 );
        bool setElement( unsigned int index, bool b0, bool b1 );
        bool setElement( unsigned int index, bool b0, bool b1, bool b2 );
        bool setElement( unsigned int index, bool b0, bool b1, bool b2, bool b3 );

        /** value query for array uniforms */
        bool getElement( unsigned int index, float& f ) const;
        bool getElement( unsigned int index, double& d ) const;
        bool getElement( unsigned int index, int& i ) const;
        bool getElement( unsigned int index, unsigned int& ui ) const;
        bool getElement( unsigned int index, bool& b ) const;
        bool getElement( unsigned int index, unsigned long long & ull ) const;
        bool getElement( unsigned int index, long long& ll ) const;
        bool getElement( unsigned int index, osg::Vec2& v2 ) const;
        bool getElement( unsigned int index, osg::Vec3& v3 ) const;
        bool getElement( unsigned int index, osg::Vec4& v4 ) const;
        bool getElement( unsigned int index, osg::Vec2d& v2 ) const;
        bool getElement( unsigned int index, osg::Vec3d& v3 ) const;
        bool getElement( unsigned int index, osg::Vec4d& v4 ) const;
        bool getElement( unsigned int index, osg::Matrix2& m2 ) const;
        bool getElement( unsigned int index, osg::Matrix3& m3 ) const;
        bool getElement( unsigned int index, osg::Matrixf& m4 ) const;
        bool getElement( unsigned int index, osg::Matrix2x3& m2x3 ) const;
        bool getElement( unsigned int index, osg::Matrix2x4& m2x4 ) const;
        bool getElement( unsigned int index, osg::Matrix3x2& m3x2 ) const;
        bool getElement( unsigned int index, osg::Matrix3x4& m3x4 ) const;
        bool getElement( unsigned int index, osg::Matrix4x2& m4x2 ) const;
        bool getElement( unsigned int index, osg::Matrix4x3& m4x3 ) const;
        bool getElement( unsigned int index, osg::Matrix2d& m2 ) const;
        bool getElement( unsigned int index, osg::Matrix3d& m3 ) const;
        bool getElement( unsigned int index, osg::Matrixd& m4 ) const;
        bool getElement( unsigned int index, osg::Matrix2x3d& m2x3 ) const;
        bool getElement( unsigned int index, osg::Matrix2x4d& m2x4 ) const;
        bool getElement( unsigned int index, osg::Matrix3x2d& m3x2 ) const;
        bool getElement( unsigned int index, osg::Matrix3x4d& m3x4 ) const;
        bool getElement( unsigned int index, osg::Matrix4x2d& m4x2 ) const;
        bool getElement( unsigned int index, osg::Matrix4x3d& m4x3 ) const;
        bool getElement( unsigned int index, int& i0, int& i1 ) const;
        bool getElement( unsigned int index, int& i0, int& i1, int& i2 ) const;
        bool getElement( unsigned int index, int& i0, int& i1, int& i2, int& i3 ) const;
        bool getElement( unsigned int index, unsigned int& ui0, unsigned int& ui1 ) const;
        bool getElement( unsigned int index, unsigned int& ui0, unsigned int& ui1, unsigned int& ui2 ) const;
        bool getElement( unsigned int index, unsigned int& ui0, unsigned int& ui1, unsigned int& ui2, unsigned int& ui3 ) const;
        bool getElement( unsigned int index, bool& b0, bool& b1 ) const;
        bool getElement( unsigned int index, bool& b0, bool& b1, bool& b2 ) const;
        bool getElement( unsigned int index, bool& b0, bool& b1, bool& b2, bool& b3 ) const;
        

        /** Set the internal data array for a osg::Uniform */
        bool setArray( FloatArray* array );
        bool setArray( DoubleArray* array );
        bool setArray( IntArray* array );
        bool setArray( UIntArray* array );
        bool setArray( UInt64Array* array );
        bool setArray( Int64Array* array );
        /** Get the internal data array for a float osg::Uniform. */
        FloatArray* getFloatArray() { return _floatArray.get(); }
        const FloatArray* getFloatArray() const { return _floatArray.get(); }

        /** Get the internal data array for a double osg::Uniform. */
        DoubleArray* getDoubleArray() { return _doubleArray.get(); }
        const DoubleArray* getDoubleArray() const { return _doubleArray.get(); }

        /** Get the internal data array for an int osg::Uniform. */
        IntArray* getIntArray() { return _intArray.get(); }
        const IntArray* getIntArray() const { return _intArray.get(); }

        /** Get the internal data array for an unsigned int osg::Uniform. */
        UIntArray* getUIntArray() { return _uintArray.get(); }
        const UIntArray* getUIntArray() const { return _uintArray.get(); }

        /** Get the internal data array for an unsigned int osg::Uniform. */
        UInt64Array* getUInt64Array() { return _uint64Array.get(); }
        const UInt64Array* getUInt64Array() const { return _uint64Array.get(); }

        /** Get the internal data array for an unsigned int osg::Uniform. */
        Int64Array* getInt64Array() { return _int64Array.get(); }
        const Int64Array* getInt64Array() const { return _int64Array.get(); }

        virtual void apply(const GLExtensions* ext, GLint location) const;

        typedef osg::UniformCallback Callback;

    protected:

        virtual ~Uniform();
        Uniform& operator=(const Uniform&) { return *this; }

        bool isCompatibleType( Type t ) const;
        // for backward compatibility only
        // see getElement(index, osg::Matrixd &)
        // see setElement(index, osg::Matrixd &)
        bool isCompatibleType( Type t1, Type t2 ) const;
        bool isScalar() const { return _numElements==1; }
        void allocateDataArray();

        Type                 _type;
        unsigned int         _numElements;


        // The internal data for osg::Uniforms are stored as an array of
        // getInternalArrayType() of length getInternalArrayNumElements().
        ref_ptr<FloatArray>  _floatArray;
        ref_ptr<DoubleArray> _doubleArray;
        ref_ptr<IntArray>    _intArray;
        ref_ptr<UIntArray>   _uintArray;
        ref_ptr<Int64Array>  _int64Array;
        ref_ptr<UInt64Array> _uint64Array;

        ref_ptr<UniformCallback> _updateCallback;
        ref_ptr<UniformCallback> _eventCallback;

        unsigned int         _modifiedCount;
};

}

#endif