/////////////////////////////////////////////////////////////////////////////// 
// Copyright (C) 2002-2025, Open Design Alliance (the "Alliance"). 
// All rights reserved. 
// 
// This software and its documentation and related materials are owned by 
// the Alliance. The software may only be incorporated into application 
// programs owned by members of the Alliance, subject to a signed 
// Membership Agreement and Supplemental Software License Agreement with the
// Alliance. The structure and organization of this software are the valuable  
// trade secrets of the Alliance and its suppliers. The software is also 
// protected by copyright law and international treaty provisions. Application  
// programs incorporating this software must include the following statement 
// with their copyright notices:
//   
//   This application incorporates Open Design Alliance software pursuant to a license 
//   agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2025 by Open Design Alliance. 
//   All rights reserved.
//
// By use of this software, its documentation or related materials, you 
// acknowledge and accept the above terms.
///////////////////////////////////////////////////////////////////////////////

#include "OdaCommon.h"
#include "SrDataBuffer.h"

OdSrDataBuffer::OdSrDataBuffer() : m_pData(nullptr),
                                   m_scanLineLength(0),
                                   m_width(0),
                                   m_height(0),
                                   m_bpp(TextureFormat::BPP24),
                                   m_colorOrder(TextureFormat::BGR),
                                   m_usePalette(false),
                                   m_transparency(TextureFormat::None),
                                   m_pTexPalette(nullptr),
                                   m_pixelGetter(nullptr),
                                   m_pixelSetter(nullptr)
{
  // Initialize with default pixel access functions
  updateAccessFunctions();
}

void OdSrDataBuffer::updateAccessFunctions()
{
  // Select appropriate getter function
  if (m_usePalette)
  {
    switch (m_bpp)
    {
    case TextureFormat::BPP1:
      m_pixelGetter = m_transparency != TextureFormat::None ? &TextureGetters::Get1bppPaletteTransparent : &TextureGetters::Get1bppPalette;
      break;
    case TextureFormat::BPP4:
      m_pixelGetter = m_transparency != TextureFormat::None ? &TextureGetters::Get4bppPaletteTransparent : &TextureGetters::Get4bppPalette;
      break;
    case TextureFormat::BPP8:
      m_pixelGetter = m_transparency != TextureFormat::None ? &TextureGetters::Get8bppPaletteTransparent : &TextureGetters::Get8bppPalette;
      break;
    default:
      m_pixelGetter = nullptr;
      m_pixelSetter = nullptr;
      break;
    }
  }
  else
  {
    // Direct color formats
    switch (m_bpp)
    {
    case TextureFormat::BPP24:
      m_pixelGetter = m_colorOrder == TextureFormat::RGB ? &TextureGetters::Get24bppRGB : &TextureGetters::Get24bppBGR;
      m_pixelSetter = m_colorOrder == TextureFormat::RGB ? &TextureSetters::Set24bppRGB : &TextureSetters::Set24bppBGR;
      break;
    case TextureFormat::BPP32:
      if (m_colorOrder == TextureFormat::RGB)
      {
        switch (m_transparency)
        {
        case TextureFormat::None:
          m_pixelGetter = &TextureGetters::Get32bppRGB;
          m_pixelSetter = &TextureSetters::Set32bppRGB;
          break;
        case TextureFormat::OneBit:
          m_pixelGetter = &TextureGetters::Get32bppRGB_Transparent1Bit;
          m_pixelSetter = &TextureSetters::Set32bppRGB_Transparent1Bit;
          break;
        case TextureFormat::EightBit:
          m_pixelGetter = &TextureGetters::Get32bppRGB_Transparent8Bit;
          m_pixelSetter = &TextureSetters::Set32bppRGB_Transparent8Bit;
          break;
        default:
          m_pixelGetter = nullptr;
          m_pixelSetter = nullptr;
          break;
        }
      }
      else
      {
        switch (m_transparency)
        {
        case TextureFormat::None:
          m_pixelGetter = &TextureGetters::Get32bppBGR;
          m_pixelSetter = &TextureSetters::Set32bppBGR;
          break;
        case TextureFormat::Default:
          m_pixelGetter = &TextureGetters::Get32bppBGR;
          m_pixelSetter = &TextureSetters::Set32bppBGR;
          break;
        case TextureFormat::OneBit:
          m_pixelGetter = &TextureGetters::Get32bppBGR_Transparent1Bit;
          m_pixelSetter = &TextureSetters::Set32bppBGR_Transparent1Bit;
          break;
        case TextureFormat::EightBit:
          m_pixelGetter = &TextureGetters::Get32bppBGR_Transparent8Bit;
          m_pixelSetter = &TextureSetters::Set32bppBGR_Transparent8Bit;
          break;
        default:
          m_pixelGetter = nullptr;
          m_pixelSetter = nullptr;
          break;
        }
      }
      break;
    default:
      m_pixelGetter = nullptr;
      m_pixelSetter = nullptr;
      break;
    }
  }
}