/*---------------------------------------------------------------------------*
  Project:  NintendoWare
  File:     gfx_ResUtil.cpp
  
  Copyright (C)2009-2011 Nintendo/HAL Laboratory, Inc.  All rights reserved.
  
  These coded instructions, statements, and computer programs contain proprietary
  information of Nintendo and/or its licensed developers and are protected by
  national and international copyright laws. 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.
  
  The content herein is highly confidential and should be handled accordingly.
  
  $Revision: $
 *---------------------------------------------------------------------------*/

#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 */