text: //===============================================================================
  // Copyright (c) 2007-2016  Advanced Micro Devices, Inc. All rights reserved.
  // Copyright (c) 2004-2006 ATI Technologies Inc.
  //===============================================================================
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files(the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions :
  // 
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  //
  //  File Name:   Codec_DXT5_RBxG.cpp
  //  Description: implementation of the CCodec_DXT5_RBxG class
  //
  //////////////////////////////////////////////////////////////////////////////
  
  #include "Common.h"
  #include "Codec_DXT5_RBxG.h"
  
  //////////////////////////////////////////////////////////////////////////////
  // Construction/Destruction
  //////////////////////////////////////////////////////////////////////////////
  
  CCodec_DXT5_RBxG::CCodec_DXT5_RBxG() :
  CCodec_DXT5_Swizzled(CT_DXT5_RBxG)
  {
  
  }
  
  CCodec_DXT5_RBxG::~CCodec_DXT5_RBxG()
  {
  
  }
  
  // Disable erroneous C4715 warning
  #pragma warning(push)
  #pragma warning(disable:4715) 
  
  
  bool CCodec_DXT5_RBxG::SetParameter(const CMP_CHAR* pszParamName, CMP_CHAR* sValue)
  {
      if (sValue == NULL) return false;
      CODECFLOAT fValue = std::stof(sValue);
      if(strcmp(pszParamName, "WeightR") == 0)
          m_fChannelWeights[1] = m_fBaseChannelWeights[1] = fValue;
      else if(strcmp(pszParamName, "WeightG") == 0)
          m_fChannelWeights[0] = m_fBaseChannelWeights[0] = fValue;
      else if(strcmp(pszParamName, "WeightB") == 0)
          m_fChannelWeights[2] = m_fBaseChannelWeights[2] = fValue;
      else
          return CCodec_DXT5_Swizzled::SetParameter(pszParamName, sValue);
      return true;
  }
  
  
  bool CCodec_DXT5_RBxG::SetParameter(const CMP_CHAR* pszParamName, CODECFLOAT fValue)
  {
      if(strcmp(pszParamName, "WeightR") == 0)
          m_fChannelWeights[0] = m_fBaseChannelWeights[0] = fValue;
      else if(strcmp(pszParamName, "WeightG") == 0)
          m_fChannelWeights[2] = m_fBaseChannelWeights[2] = fValue;
      else if(strcmp(pszParamName, "WeightB") == 0)
          m_fChannelWeights[1] = m_fBaseChannelWeights[1] = fValue;
      else
          return CCodec_DXT5_Swizzled::SetParameter(pszParamName, fValue);
      return true;
  }
  
  bool CCodec_DXT5_RBxG::GetParameter(const CMP_CHAR* pszParamName, CODECFLOAT& fValue)
  {
      if(strcmp(pszParamName, "WeightR") == 0)
          fValue = m_fBaseChannelWeights[0];
      else if(strcmp(pszParamName, "WeightG") == 0)
          fValue = m_fBaseChannelWeights[2];
      else if(strcmp(pszParamName, "WeightB") == 0)
          fValue = m_fBaseChannelWeights[1];
      else
          return CCodec_DXT5_Swizzled::GetParameter(pszParamName, fValue);
      return true;
  }
  
  // Re-enable erroneous C4715 warning
  #pragma warning(pop)
  
  void CCodec_DXT5_RBxG::ReadBlock(CCodecBuffer& buffer, CMP_DWORD x, CMP_DWORD y, CMP_BYTE block[BLOCK_SIZE_4X4X4])
  {
      CMP_BYTE dwTempBlock[BLOCK_SIZE_4X4X4];
      buffer.ReadBlockRGBA(x, y, 4, 4, dwTempBlock);
      for(CMP_DWORD i = 0; i < BLOCK_SIZE_4X4; i++)
          ((CMP_DWORD*)block)[i] = SWIZZLE_RGBA_RBxG(((CMP_DWORD*)dwTempBlock)[i]);
  }
  
  void CCodec_DXT5_RBxG::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++)
          ((CMP_DWORD*)dwTempBlock)[i] = SWIZZLE_RBxG_RGBA(((CMP_DWORD*)block)[i]);
      buffer.WriteBlockRGBA(x, y, 4, 4, dwTempBlock);
  }
  
  void CCodec_DXT5_RBxG::ReadBlock(CCodecBuffer& buffer, CMP_DWORD x, CMP_DWORD y, CODECFLOAT block[BLOCK_SIZE_4X4X4])
  {
      CODECFLOAT fTempBlock[BLOCK_SIZE_4X4X4];
      buffer.ReadBlockRGBA(x, y, 4, 4, fTempBlock);
      for(CMP_DWORD i = 0; i < BLOCK_SIZE_4X4; i++)
      {
          block[(i* 4) + RGBA32F_OFFSET_R] = fTempBlock[(i* 4) + RGBA32F_OFFSET_R];
          block[(i* 4) + RGBA32F_OFFSET_G] = fTempBlock[(i* 4) + RGBA32F_OFFSET_B];
          block[(i* 4) + RGBA32F_OFFSET_B] = 0;
          block[(i* 4) + RGBA32F_OFFSET_A] = fTempBlock[(i* 4) + RGBA32F_OFFSET_G];
      }
  }
  
  void CCodec_DXT5_RBxG::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_R];
          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_B] = block[(i * 4) + RGBA32F_OFFSET_G];
          fTempBlock[(i* 4) + RGBA32F_OFFSET_A] = 0.0;
      }
      buffer.WriteBlockRGBA(x, y, 4, 4, fTempBlock);
  }