/**********************************************************************
 *
 *    FILE:            BlendFunc.cpp
 *
 *    DESCRIPTION:    Read/Write osg::BlendFunc in binary format to disk.
 *
 *    CREATED BY:        Auto generated by iveGenerated
 *                    and later modified by Rune Schmidt Jensen.
 *
 *    HISTORY:        Created 21.3.2003
 *
 *    Copyright 2003 VR-C
 **********************************************************************/

#include "Exception.h"
#include "BlendFunc.h"
#include "Object.h"

using namespace ive;

void BlendFunc::write(DataOutputStream* out){

    bool bSeparate = getSource() != getSourceAlpha() || getDestination() != getDestinationAlpha();

    // Write BlendFunc's identification.
    out->writeInt(bSeparate ? IVEBLENDFUNCSEPARATE : IVEBLENDFUNC);
    // If the osg class is inherited by any other class we should also write this to file.
    osg::Object*  obj = dynamic_cast<osg::Object*>(this);
    if(obj){
        ((ive::Object*)(obj))->write(out);
    }
    else
        throw Exception("BlendFunc::write(): Could not cast this osg::BlendFunc to an osg::Object.");
    // Write BlendFunc's properties.

    // Write source
    out->writeInt(getSource());
    // Write destination
    out->writeInt(getDestination());

    if (bSeparate)
    {
        // Write source alpha
        out->writeInt(getSourceAlpha());
        // Write destination alpha
        out->writeInt(getDestinationAlpha());
    }
}

void BlendFunc::read(DataInputStream* in){
    // Peek on BlendFunc's identification.
    int id = in->peekInt();
    if(id == IVEBLENDFUNC || id == IVEBLENDFUNCSEPARATE){
        // Read BlendFunc's identification.
        id = in->readInt();
        // If the osg class is inherited by any other class we should also read this from file.
        osg::Object*  obj = dynamic_cast<osg::Object*>(this);
        if(obj){
            ((ive::Object*)(obj))->read(in);
        }
        else
            throw Exception("BlendFunc::read(): Could not cast this osg::BlendFunc to an osg::Object.");
        // Read BlendFunc's properties

        // Read source
        setSource((GLenum)in->readInt());
        // Read destination
        setDestination((GLenum)in->readInt());

        if (id == IVEBLENDFUNCSEPARATE)
        {
            // Read source alpha
            setSourceAlpha((GLenum)in->readInt());

            // Read destination alpha
            setDestinationAlpha((GLenum)in->readInt());
        }

    }
    else{
        throw Exception("BlendFunc::read(): Expected BlendFunc identification.");
    }
}
