// Copyright (C) 2002-2005 Gideon May (gideon@computer.org)
//
// Permission to copy, use, sell and distribute this software is granted
// provided this copyright notice appears in all copies.
// Permission to modify the code and to distribute modified code is granted
// provided this copyright notice appears in all copies, and a notice
// that the code was modified is included with the copyright notice.
//
// This software is provided "as is" without express or implied warranty,
// and with no claim as to its suitability for any purpose.
//
// cleaned up by brett hartshorn, may08 2004
// updated for OSG CVS july 6th 2004 by brett hartshorn

#include <boost/python/class.hpp>
#include <boost/python/scope.hpp>
#include <boost/python/enum.hpp>

#include <osg/GL>
#include <osg/AlphaFunc>

#include "StateAttribute.hpp"
#include "held_ptr.hpp"

using namespace boost::python;

typedef class_<osg::AlphaFunc, osg::ref_ptr<osg::AlphaFunc>, bases<osg::StateAttribute>, boost::noncopyable > AlphaFunc;

namespace {
DEFINE_STATEATTRIBUTE_CAST(AlphaFunc)
}

namespace PyOSG {
void init_AlphaFunc()
{
    REGISTER_STATEATTRIBUTE_CAST(AlphaFunc)

    AlphaFunc alphafunc("AlphaFunc", "Encapsulate OpenGL glAlphaFunc.\n", no_init);

    scope alphafunc_scope(alphafunc);

    alphafunc
        .def(init<>())
        // ModeUsage defined in StateAttribute - not needed
        // .def("getModeUsage"
        //     &osg::AlphaFunc::getModeUsage)
        .def("setFunction",
            (void (osg::AlphaFunc::*) (osg::AlphaFunc::ComparisonFunction, float)) &osg::AlphaFunc::setFunction,
            args("func", "ref"),
            "setFunction(func, ref)\n\n"
            "Set the ComparisonFunction to the specified float value.")
        .def("setFunction",
            (void (osg::AlphaFunc::*) (osg::AlphaFunc::ComparisonFunction)) &osg::AlphaFunc::setFunction,
            args("func"),
            "setFunction(func)\n\n"
            "Set the ComparisonFunction.")
        .def("getFunction",
            &osg::AlphaFunc::getFunction,
            "getFunction() -> func\n\n"
            "Return the current ComparisonFunction.")
        .def("setReferenceValue",
            &osg::AlphaFunc::setReferenceValue,
            "setReferenceValue(set)\n\n"
            "Set the reference value.")
        .def("getReferenceValue",
            &osg::AlphaFunc::getReferenceValue,
            "getReferenceValue() -> ref\n\n"
            "Return the current reference value.")
        ;

    enum_<osg::AlphaFunc::ComparisonFunction> cfunc("ComparisonFunction");

#   define OSG_ENUM(VALUE) \
        (cfunc.value(#VALUE, osg::AlphaFunc::VALUE), \
        alphafunc.def(#VALUE, object(osg::AlphaFunc::VALUE)))
    OSG_ENUM(NEVER);
    OSG_ENUM(LESS);
    OSG_ENUM(EQUAL);
    OSG_ENUM(LEQUAL);
    OSG_ENUM(GREATER);
    OSG_ENUM(NOTEQUAL);
    OSG_ENUM(GEQUAL);
    OSG_ENUM(ALWAYS);
}
} // namespace PyOSG