libmng_object_prc.c

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    if (iBitdepth == 16)
      iNewsamplesize = 6;
#endif
  }
  else                                 /* rgb -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_RGB) &&
      (iColortype == MNG_COLORTYPE_RGBA))
  {
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
#ifndef MNG_NO_16BIT_SUPPORT
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_rgb8_rgba16;
      else
#endif
        pData->fPromoterow = (mng_fptr)mng_promote_rgb8_rgba8;
    }
#ifndef MNG_NO_16BIT_SUPPORT
    else                               /* source = 16 bits */
      pData->fPromoterow = (mng_fptr)mng_promote_rgb16_rgba16;
#endif

    iNewsamplesize = 4;
#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 8;
#endif
  }
  else                                 /* indexed -> rgb */
  if ((pBuf->iColortype == MNG_COLORTYPE_INDEXED) &&
      (iColortype == MNG_COLORTYPE_RGB))
  {
#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)
      pData->fPromoterow = (mng_fptr)mng_promote_idx8_rgb16;
    else
#endif
      pData->fPromoterow = (mng_fptr)mng_promote_idx8_rgb8;

    iNewsamplesize = 3;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 6;
#endif
  }
  else                                 /* indexed -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_INDEXED) &&
      (iColortype == MNG_COLORTYPE_RGBA))
  {
#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)
      pData->fPromoterow = (mng_fptr)mng_promote_idx8_rgba16;
    else
#endif
      pData->fPromoterow = (mng_fptr)mng_promote_idx8_rgba8;

    iNewsamplesize = 4;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 8;
#endif
  }
  else                                 /* rgba -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_RGBA) &&
      (iColortype == MNG_COLORTYPE_RGBA))
  {
    iNewsamplesize = 4;
#ifndef MNG_NO_16BIT_SUPPORT
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_rgba8_rgba16;
    }
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 8;
#endif
  }
#ifdef MNG_INCLUDE_JNG
  else                                 /* JPEG g -> g */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGGRAY) &&
      (iColortype == MNG_COLORTYPE_JPEGGRAY))
  {
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
#ifndef MNG_NO_16BIT_SUPPORT
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_g8_g16;
      else
#endif
        pData->fPromoterow = (mng_fptr)mng_promote_g8_g8;
    }

    iNewsamplesize = 1;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 2;
#endif
  }
  else                                 /* JPEG g -> ga */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGGRAY) &&
      (iColortype == MNG_COLORTYPE_JPEGGRAYA))
  {
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
#ifndef MNG_NO_16BIT_SUPPORT
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_g8_ga16;
      else
#endif
        pData->fPromoterow = (mng_fptr)mng_promote_g8_ga8;
    }
#ifndef MNG_NO_16BIT_SUPPORT
    else                               /* source = 16 bits */
      pData->fPromoterow = (mng_fptr)mng_promote_g16_ga16;
#endif

    iNewsamplesize = 2;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 4;
#endif
  }
  else                                 /* JPEG g -> rgb */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGGRAY) &&
      (iColortype == MNG_COLORTYPE_JPEGCOLOR))
  {
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
#ifndef MNG_NO_16BIT_SUPPORT
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_g8_rgb16;
      else
#endif
        pData->fPromoterow = (mng_fptr)mng_promote_g8_rgb8;
    }
#ifndef MNG_NO_16BIT_SUPPORT
    else                               /* source = 16 bits */
      pData->fPromoterow = (mng_fptr)mng_promote_g16_rgb16;
#endif

    iNewsamplesize = 3;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 6;
#endif
  }
  else                                 /* JPEG g -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGGRAY) &&
      (iColortype == MNG_COLORTYPE_JPEGCOLORA))
  {
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
#ifndef MNG_NO_16BIT_SUPPORT
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_g8_rgba16;
      else
#endif
        pData->fPromoterow = (mng_fptr)mng_promote_g8_rgba8;
    }
#ifndef MNG_NO_16BIT_SUPPORT
    else                               /* source = 16 bits */
      pData->fPromoterow = (mng_fptr)mng_promote_g16_rgba16;
#endif

    iNewsamplesize = 4;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 8;
#endif
  }
  else                                 /* JPEG ga -> ga */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGGRAYA) &&
      (iColortype == MNG_COLORTYPE_JPEGGRAYA))
  {
    iNewsamplesize = 2;
#ifndef MNG_NO_16BIT_SUPPORT
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_ga8_ga16;
    if (iBitdepth == 16)
      iNewsamplesize = 4;
#endif

  }
  else                                 /* JPEG ga -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGGRAYA) &&
      (iColortype == MNG_COLORTYPE_JPEGCOLORA))
  {
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
#ifndef MNG_NO_16BIT_SUPPORT
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_ga8_rgba16;
      else
#endif
        pData->fPromoterow = (mng_fptr)mng_promote_ga8_rgba8;
    }
#ifndef MNG_NO_16BIT_SUPPORT
    else                               /* source = 16 bits */
      pData->fPromoterow = (mng_fptr)mng_promote_ga16_rgba16;
#endif

    iNewsamplesize = 4;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 8;
#endif
  }
  else                                 /* JPEG rgb -> rgb */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGCOLOR) &&
      (iColortype == MNG_COLORTYPE_JPEGCOLOR))
  {
    iNewsamplesize = 3;
#ifndef MNG_NO_16BIT_SUPPORT
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_rgb8_rgb16;
    if (iBitdepth == 16)
      iNewsamplesize = 6;
#endif

  }
  else                                 /* JPEG rgb -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGCOLOR) &&
      (iColortype == MNG_COLORTYPE_JPEGCOLORA))
  {
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
    {
#ifndef MNG_NO_16BIT_SUPPORT
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_rgb8_rgba16;
      else
#endif
        pData->fPromoterow = (mng_fptr)mng_promote_rgb8_rgba8;
    }
#ifndef MNG_NO_16BIT_SUPPORT
    else                               /* source = 16 bits */
      pData->fPromoterow = (mng_fptr)mng_promote_rgb16_rgba16;
#endif

    iNewsamplesize = 4;

#ifndef MNG_NO_16BIT_SUPPORT
    if (iBitdepth == 16)               /* 16-bit wide ? */
      iNewsamplesize = 8;
#endif
  }
  else                                 /* JPEG rgba -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_JPEGCOLORA) &&
      (iColortype == MNG_COLORTYPE_JPEGCOLORA))
  {
    iNewsamplesize = 4;
#ifndef MNG_NO_16BIT_SUPPORT
    if (pBuf->iBitdepth <= 8)          /* source <= 8 bits */
      if (iBitdepth == 16)
        pData->fPromoterow = (mng_fptr)mng_promote_rgba8_rgba16;
    if (iBitdepth == 16)
      iNewsamplesize = 8;
#endif
  }
#endif /* JNG */

  /* found a proper promotion ? */
  if (pData->fPromoterow)
  {
    pData->pPromBuf    = (mng_ptr)pBuf;
    pData->iPromWidth  = pBuf->iWidth;
    iNewrowsize        = iW * iNewsamplesize;
    iNewbufsize        = iH * iNewrowsize;

    MNG_ALLOC (pData, pNewbuf, iNewbufsize)

    pData->pPromSrc    = (mng_ptr)pBuf->pImgdata;
    pData->pPromDst    = (mng_ptr)pNewbuf;
    iY                 = 0;

    while ((!iRetcode) && (iY < iH))
    {
      iRetcode         = ((mng_promoterow)pData->fPromoterow) (pData);
      pData->pPromSrc  = (mng_uint8p)pData->pPromSrc + pBuf->iRowsize;
      pData->pPromDst  = (mng_uint8p)pData->pPromDst + iNewrowsize;
/*      pData->pPromSrc  = (mng_ptr)((mng_uint32)pData->pPromSrc + pBuf->iRowsize); */
/*      pData->pPromDst  = (mng_ptr)((mng_uint32)pData->pPromDst + iNewrowsize); */
      iY++;
    }

    MNG_FREEX (pData, pBuf->pImgdata, pBuf->iImgdatasize)

    pBuf->iBitdepth    = iBitdepth;
    pBuf->iColortype   = iColortype;
    pBuf->iSamplesize  = iNewsamplesize;
    pBuf->iRowsize     = iNewrowsize;
    pBuf->iImgdatasize = iNewbufsize;
    pBuf->pImgdata     = pNewbuf;
    pBuf->bHasPLTE     = MNG_FALSE;
    pBuf->iPLTEcount   = 0;
    pBuf->bHasTRNS     = MNG_FALSE;
    pBuf->iTRNScount   = 0;

    if (iRetcode)                      /* on error bail out */
      return iRetcode;
  }

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_PROMOTE_IMGOBJECT, MNG_LC_END)
#endif

  return MNG_NOERROR;
}
#endif

/* ************************************************************************** */

#ifndef MNG_SKIPCHUNK_MAGN
mng_retcode mng_magnify_imageobject (mng_datap  pData,
                                     mng_imagep pImage)
{
  mng_uint8p     pNewdata;
  mng_uint8p     pSrcline1;
  mng_uint8p     pSrcline2;
  mng_uint8p     pTempline;
  mng_uint8p     pDstline;
  mng_uint32     iNewrowsize;
  mng_uint32     iNewsize;
  mng_uint32     iY;
  mng_int32      iS, iM;
  mng_retcode    iRetcode;

  mng_imagedatap pBuf      = pImage->pImgbuf;
  mng_uint32     iNewW     = pBuf->iWidth;
  mng_uint32     iNewH     = pBuf->iHeight;
  mng_magnify_x  fMagnifyX = MNG_NULL;
  mng_magnify_y  fMagnifyY = MNG_NULL;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_MAGNIFY_IMGOBJECT, MNG_LC_START)
#endif

  if (pBuf->iColortype == MNG_COLORTYPE_INDEXED)