#include <qdebug></qdebug>

#include "t32bitsrv_wrap.h"

//================================================================================

int t32bitsrv::BufferExchanger::read(const char *srcBuf, int len) {

  m_data = (UCHAR *)memcpy(m_data, srcBuf, len);

  return len;

}

//--------------------------------------------------------------------------------

int t32bitsrv::BufferExchanger::write(char *dstBuf, int len) {

  memcpy(dstBuf, m_data, len);

  m_data += len;

  return len;

}

//================================================================================

template <typename pixel=""></typename>

int t32bitsrv::RasterExchanger<pixel>::read(const char *srcBuf, int len) {</pixel>

  if (m_ras->getWrap() == m_ras->getLx()) {

    memcpy(m_pix, srcBuf, len);

    m_pix = (PIXEL *)((UCHAR *)m_pix + len);

  } else {

    int xStart         = (m_pix - m_ras->pixels(0)) % m_ras->getWrap();

    int remainingData  = len;

    int lineData       = m_ras->getLx() * sizeof(PIXEL);

    int lineDataToRead = std::min(

        (int)((m_ras->getLx() - xStart) * sizeof(PIXEL)), remainingData);

    for (; remainingData > 0;

         m_pix += (m_ras->getWrap() - xStart), remainingData -= lineDataToRead,

         lineDataToRead = std::min(lineData, remainingData), xStart = 0)

      memcpy(m_pix, srcBuf, lineDataToRead);

  }

  return len;

}

//--------------------------------------------------------------------------------

template <typename pixel=""></typename>

int t32bitsrv::RasterExchanger<pixel>::write(char *dstBuf, int len) {</pixel>

  // We pass entire pixels, not just bytes

  len = len - (len % sizeof(PIXEL));

  if (m_ras->getWrap() == m_ras->getLx()) {

    memcpy(dstBuf, m_pix, len);

    m_pix = (PIXEL *)((UCHAR *)m_pix + len);

  } else {

    int xStart          = (m_pix - m_ras->pixels(0)) % m_ras->getWrap();

    int remainingData   = len;

    int lineData        = m_ras->getLx() * sizeof(PIXEL);

    int lineDataToWrite = std::min(

        (int)((m_ras->getLx() - xStart) * sizeof(PIXEL)), remainingData);

    for (; remainingData > 0;

         m_pix += (m_ras->getWrap() - xStart), remainingData -= lineDataToWrite,

         lineDataToWrite = std::min(lineData, remainingData), xStart = 0)

      memcpy(dstBuf, m_pix, lineDataToWrite);

  }

  return len;

}

//--------------------------------------------------------------------------------

//  Explicit specialization of raster exchangers

template class DVAPI t32bitsrv::RasterExchanger<tpixel32>;</tpixel32>

//================================================================================