/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     gfx_ResUtil.cpp

  Copyright (C)2009-2010 Nintendo Co., Ltd./HAL Laboratory, Inc.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Revision: 13983 $
 *---------------------------------------------------------------------------*/

#include "../precompiled.h"

#include <nw/gfx/res/gfx_ResUtil.h>
#include <nw/gfx/res/gfx_ResGraphicsFile.h>

namespace nw {
namespace gfx {
namespace res {

//----------------------------------------
Result
SetupReferenceLut(ResReferenceLookupTable resReferenceLut, ResGraphicsFile graphicsFile)
{
    Result result = RESOURCE_RESULT_OK;

    if (resReferenceLut.IsValid())
    {
        ResImageLookupTable resImageLut = ResDynamicCast<ResImageLookupTable>(resReferenceLut.GetTargetLut());
        if (!resImageLut.IsValid())
        {
            ::std::pair<ResLookupTable, bool> referenceResult;
            referenceResult = GetReferenceLutTarget(resReferenceLut, graphicsFile);

            if (!referenceResult.second)
            {
                result |= Result::MASK_FAIL_BIT;
                result |= RESOURCE_RESULT_NOT_FOUND_LUT;
            }
        }
    }

    return result;
}

//----------------------------------------
::std::pair<ResLookupTable, bool>
GetReferenceLutTarget(ResReferenceLookupTable referenceLut, ResGraphicsFile graphicsFile)
{
    bool isExisted = false;
    const char* path = referenceLut.GetPath();
    const char* tableName = referenceLut.GetTableName();
    int lutSetNum = graphicsFile.GetLutSetsCount();
    
    ResLookupTableSet resLutSet = graphicsFile.GetLutSets(path);

    if (resLutSet.IsValid())
    {
        ResImageLookupTable resLut = 
            ResDynamicCast<ResImageLookupTable>(resLutSet.GetSamplers(tableName));

        if (resLut.IsValid())
        {
            referenceLut.ref().toTargetLut.set_ptr(resLut.ptr());
            isExisted = true;
        }
    }

    return ::std::make_pair(referenceLut.GetTargetLut(), isExisted);
}

//----------------------------------------------------------------------------
::std::pair<ResTexture, bool>
GetReferenceTextureTarget(ResReferenceTexture referenceTexture, ResGraphicsFile graphicsFile)
{
    bool isExisted = false;
    const char* path = referenceTexture.GetPath();
    ResTexture resTexture = graphicsFile.GetTextures(path);
    
    if (resTexture.IsValid())
    {
        ResReferenceTexture refer = ResDynamicCast<ResReferenceTexture>(resTexture);

        // 再帰呼び出しによって参照解決する
        if (refer.IsValid())
        {
            ::std::pair<ResTexture, bool> referenceResult;
            referenceResult = GetReferenceTextureTarget(refer, graphicsFile);
            if (referenceResult.second)
            {
                referenceTexture.ref().toTargetTexture.set_ptr(referenceResult.first.ptr());
                isExisted = true;
            }
        }
        else
        {
            referenceTexture.ref().toTargetTexture.set_ptr(resTexture.ptr());
            isExisted = true;
        }
    }

    return ::std::make_pair(referenceTexture.GetTargetTexture(), isExisted);
}

//----------------------------------------
::std::pair<ResShader, bool>
GetReferenceShaderTarget(ResReferenceShader referenceShader, ResGraphicsFile graphicsFile)
{
    bool isExisted = false;
    const char* path = referenceShader.GetPath();
    ResShader resShader = graphicsFile.GetShaders(path);

    if (resShader.IsValid())
    {
        ResReferenceShader refer = ResDynamicCast<ResReferenceShader>(resShader);

        // 再帰呼び出しによって参照解決する
        if (refer.IsValid())
        {
            ::std::pair<ResShader, bool> referenceResult;
            referenceResult = GetReferenceShaderTarget(refer, graphicsFile);
            if (referenceResult.second)
            {
                referenceShader.ref().toTargetShader.set_ptr(referenceResult.first.ptr());
                isExisted = true;
            }
        }
        else
        {
            referenceShader.ref().toTargetShader.set_ptr(resShader.ptr());
            isExisted = true;
        }
    }

    return ::std::make_pair(referenceShader.GetTargetShader(),isExisted);
}

} /* namespace res */
} /* namespace gfx */
} /* namespace nw */