CodecError CCodec_DXT5::Decompress(CCodecBuffer& bufferIn, CCodecBuffer& bufferOut, Codec_Feedback_Proc pFeedbackProc, CMP_DWORD_PTR pUser1, CMP_DWORD_PTR pUser2)
{
    assert(bufferIn.GetWidth() == bufferOut.GetWidth());
    assert(bufferIn.GetHeight() == bufferOut.GetHeight());

    if(bufferIn.GetWidth() != bufferOut.GetWidth() || bufferIn.GetHeight() != bufferOut.GetHeight())
        return CE_Unknown;

    const CMP_DWORD dwBlocksX = ((bufferIn.GetWidth() + 3) >> 2);
    const CMP_DWORD dwBlocksY = ((bufferIn.GetHeight() + 3) >> 2);
    const CMP_DWORD dwBlocksXY = dwBlocksX*dwBlocksY;

    bool bUseFixed = (!bufferOut.IsFloat() && bufferOut.GetChannelDepth() == 8 && !m_bUseFloat);

    for(CMP_DWORD j = 0; j < dwBlocksY; j++)
    {
        for(CMP_DWORD i = 0; i < dwBlocksX; i++)
        {
            CMP_DWORD compressedBlock[4];
            bufferIn.ReadBlock(i*4, j*4, compressedBlock, 4);
            if(bUseFixed)
            {
                CMP_BYTE destBlock[BLOCK_SIZE_4X4X4];
                DecompressRGBABlock(destBlock, compressedBlock);
                bufferOut.WriteBlockRGBA(i*4, j*4, 4, 4, destBlock);
            }
            else
            {
                float destBlock[BLOCK_SIZE_4X4X4];
                DecompressRGBABlock(destBlock, compressedBlock);
                bufferOut.WriteBlockRGBA(i*4, j*4, 4, 4, destBlock);
            }
        }

        if (pFeedbackProc)
        {
            float fProgress = 100.f * (j * dwBlocksX) / dwBlocksXY;
            if (pFeedbackProc(fProgress, pUser1, pUser2))
            {
                return CE_Aborted;
            }
        }


    }

    return CE_OK;
}
void CCodec_DXT5_xRBG::WriteBlock(CCodecBuffer& buffer, CMP_DWORD x, CMP_DWORD y, CMP_BYTE block[BLOCK_SIZE_4X4X4])
{
    CMP_BYTE dwTempBlock[BLOCK_SIZE_4X4X4];
    for(CMP_DWORD i = 0; i < BLOCK_SIZE_4X4; i++)
        ((DWORD*)dwTempBlock)[i] = SWIZZLE_xRBG_RGBA(((DWORD*)block)[i]);
    buffer.WriteBlockRGBA(x, y, 4, 4, dwTempBlock);
}
void CCodec_DXT5_xRBG::WriteBlock(CCodecBuffer& buffer, CMP_DWORD x, CMP_DWORD y, CODECFLOAT block[BLOCK_SIZE_4X4X4])
{
    CODECFLOAT fTempBlock[BLOCK_SIZE_4X4X4];
    for(CMP_DWORD i = 0; i < BLOCK_SIZE_4X4; i++)
    {
        fTempBlock[(i* 4) + RGBA32F_OFFSET_R] = block[(i* 4) + RGBA32F_OFFSET_G];
        fTempBlock[(i* 4) + RGBA32F_OFFSET_G] = block[(i* 4) + RGBA32F_OFFSET_A];
        fTempBlock[(i* 4) + RGBA32F_OFFSET_B] = block[(i* 4) + RGBA32F_OFFSET_B];
        fTempBlock[(i* 4) + RGBA32F_OFFSET_A] = 0.0;
    }
    buffer.WriteBlockRGBA(x, y, 4, 4, fTempBlock);
}
CodecError CCodec_ATC_RGBA_Interpolated::Decompress(CCodecBuffer& bufferIn, CCodecBuffer& bufferOut, Codec_Feedback_Proc pFeedbackProc, CMP_DWORD_PTR pUser1, CMP_DWORD_PTR pUser2)
{
    assert(bufferIn.GetWidth() == bufferOut.GetWidth());
    assert(bufferIn.GetHeight() == bufferOut.GetHeight());

    if(bufferIn.GetWidth() != bufferOut.GetWidth() || bufferIn.GetHeight() != bufferOut.GetHeight())
        return CE_Unknown;

    const CMP_DWORD dwBlocksX = ((bufferIn.GetWidth() + 3) >> 2);
    const CMP_DWORD dwBlocksY = ((bufferIn.GetHeight() + 3) >> 2);
    const CMP_DWORD dwBlocksXY = dwBlocksX*dwBlocksY;

    CMP_DWORD compressedBlock[4];
    CMP_BYTE destBlock[BLOCK_SIZE_4X4X4];
    for(CMP_DWORD j = 0; j < dwBlocksY; j++)
    {
        for(CMP_DWORD i = 0; i < dwBlocksX; i++)
        {
            bufferIn.ReadBlock(i*4, j*4, compressedBlock, 4);
            DecompressRGBABlock_InterpolatedAlpha(destBlock, compressedBlock);
            bufferOut.WriteBlockRGBA(i*4, j*4, 4, 4, destBlock);
        }

        if (pFeedbackProc)
        {
            float fProgress = 100.f * (j * dwBlocksX) / dwBlocksXY;
            if (pFeedbackProc(fProgress, pUser1, pUser2))
            {
                return CE_Aborted;
            }
        }

    }

    return CE_OK;
}
CodecError CCodec_GT::Decompress(CCodecBuffer& bufferIn, CCodecBuffer& bufferOut, Codec_Feedback_Proc pFeedbackProc, DWORD_PTR pUser1, DWORD_PTR pUser2)
{
    assert(bufferIn.GetWidth() == bufferOut.GetWidth());
    assert(bufferIn.GetHeight() == bufferOut.GetHeight());
    
    CodecError err = InitializeGTLibrary();
    if (err != CE_OK) return err;
    
    if(bufferIn.GetWidth() != bufferOut.GetWidth() || bufferIn.GetHeight() != bufferOut.GetHeight())
        return CE_Unknown;

    const CMP_DWORD dwBlocksX = ((bufferIn.GetWidth() + 3) >> 2);
    const CMP_DWORD dwBlocksY = ((bufferIn.GetHeight() + 3) >> 2);
    const CMP_DWORD dwBlocksXY = dwBlocksX*dwBlocksY;

    for(CMP_DWORD j = 0; j < dwBlocksY; j++)
    {
        for(CMP_DWORD i = 0; i < dwBlocksX; i++)
        {
            union FBLOCKS
            {
                BYTE decodedBlock[16][4];
                BYTE destBlock[BLOCK_SIZE_4X4X4];
            } DecData;

            union BBLOCKS
            {
                CMP_DWORD    compressedBlock[4];
                BYTE            out[16];
                BYTE            in[16];
            } CompData;

            CMP_BYTE destBlock[BLOCK_SIZE_4X4X4];
            
            bufferIn.ReadBlock(i*4, j*4, CompData.compressedBlock, 4);

            // Encode to the appropriate location in the compressed image
            m_decoder->DecompressBlock(DecData.decodedBlock,CompData.in);

            // Create the block for decoding
            int srcIndex = 0;
            for(int row=0; row < BLOCK_SIZE_4; row++)
            {
                for(int col=0; col<BLOCK_SIZE_4; col++)
                {
                    destBlock[srcIndex]   = (CMP_BYTE)DecData.decodedBlock[row*BLOCK_SIZE_4+col][BC_COMP_RED];
                    destBlock[srcIndex+1] = (CMP_BYTE)DecData.decodedBlock[row*BLOCK_SIZE_4+col][BC_COMP_GREEN];
                    destBlock[srcIndex+2] = (CMP_BYTE)DecData.decodedBlock[row*BLOCK_SIZE_4+col][BC_COMP_BLUE];
                    destBlock[srcIndex+3] = (CMP_BYTE)DecData.decodedBlock[row*BLOCK_SIZE_4+col][BC_COMP_ALPHA];
                    srcIndex+=4;
                }
            }

            bufferOut.WriteBlockRGBA(i*4, j*4, 4, 4, destBlock);

        }

        if (pFeedbackProc)
        {
            float fProgress = 100.f * (j * dwBlocksX) / dwBlocksXY;
            if (pFeedbackProc(fProgress, pUser1, pUser2))
            {
#ifdef GT_COMPDEBUGGER
                g_CompClient.disconnect();
#endif
                return CE_Aborted;
            }
        }

    }
    return CE_OK;
}