#include "osg/TexEnv"

#include "osgDB/Registry"
#include "osgDB/Input"
#include "osgDB/Output"

using namespace osg;
using namespace osgDB;

// forward declare functions to use later.
bool TexEnv_readLocalData(Object& obj, Input& fr);
bool TexEnv_writeLocalData(const Object& obj, Output& fw);
bool TexEnv_matchModeStr(const char* str,TexEnv::Mode& mode);
const char* TexEnv_getModeStr(TexEnv::Mode mode);

// register the read and write functions with the osgDB::Registry.
RegisterDotOsgWrapperProxy g_TexEnvProxy
(
    new osg::TexEnv,
    "TexEnv",
    "Object StateAttribute TexEnv",
    &TexEnv_readLocalData,
    &TexEnv_writeLocalData
);


bool TexEnv_readLocalData(Object& obj, Input& fr)
{
    bool iteratorAdvanced = false;

    TexEnv& texenv = static_cast<TexEnv&>(obj);

    TexEnv::Mode mode;
    if (fr[0].matchWord("mode") && TexEnv_matchModeStr(fr[1].getStr(),mode))
    {
        texenv.setMode(mode);
        fr+=2;
        iteratorAdvanced = true;
    }

    return iteratorAdvanced;
}

bool TexEnv_writeLocalData(const Object& obj, Output& fw)
{
    const TexEnv& texenv = static_cast<const TexEnv&>(obj);

    fw.indent() << "mode " << TexEnv_getModeStr(texenv.getMode()) << endl;

    return true;
}

bool TexEnv_matchModeStr(const char* str,TexEnv::Mode& mode)
{
    if (strcmp(str,"DECAL")==0)         mode = TexEnv::DECAL;
    else if (strcmp(str,"MODULATE")==0) mode = TexEnv::MODULATE;
    else if (strcmp(str,"BLEND")==0)    mode = TexEnv::BLEND;
    else if (strcmp(str,"REPLACE")==0)  mode = TexEnv::REPLACE;
    else return false;
    return true;
}


const char* TexEnv_getModeStr(TexEnv::Mode mode)
{
    switch(mode)
    {
        case(TexEnv::DECAL):    return "DECAL";
        case(TexEnv::MODULATE): return "MODULATE";
        case(TexEnv::BLEND):    return "BLEND";
        case(TexEnv::REPLACE):  return "REPLACE";
    }
    return "";
}