libmng_object_prc.c

奇趣公司比较新的qt/emd版本

        *pTemp = 0;
        pTemp++;
      }
    }
  }

  pBuf->iSamplesize  = iSamplesize;    /* remember new sizes */
  pBuf->iRowsize     = iRowsize;
  pBuf->iImgdatasize = iImgdatasize;

  if (!pBuf->iPixelsampledepth)        /* set delta sampledepths if empty */
    pBuf->iPixelsampledepth = iBitdepth;
  if (!pBuf->iAlphasampledepth)
    pBuf->iAlphasampledepth = iBitdepth;
                                       /* dimension set and clipping not ? */
  if ((iWidth) && (iHeight) && (!pImage->bClipped))
  {
    pImage->iClipl   = 0;              /* set clipping to dimension by default */
    pImage->iClipr   = iWidth;
    pImage->iClipt   = 0;
    pImage->iClipb   = iHeight;
  }

#ifndef MNG_SKIPCHUNK_MAGN
  if (pImage->iId)                     /* reset magnification info ? */
  {
    pImage->iMAGN_MethodX = 0;
    pImage->iMAGN_MethodY = 0;
    pImage->iMAGN_MX      = 0;
    pImage->iMAGN_MY      = 0;
    pImage->iMAGN_ML      = 0;
    pImage->iMAGN_MR      = 0;
    pImage->iMAGN_MT      = 0;
    pImage->iMAGN_MB      = 0;
  }
#endif

  if (bResetall)                       /* reset the other characteristics ? */
  {
#ifndef MNG_SKIPCHUNK_PAST
    pImage->iPastx = 0;
    pImage->iPasty = 0;
#endif

    pBuf->bHasPLTE = MNG_FALSE;
    pBuf->bHasTRNS = MNG_FALSE;
    pBuf->bHasGAMA = pData->bHasglobalGAMA;
#ifndef MNG_SKIPCHUNK_cHRM
    pBuf->bHasCHRM = pData->bHasglobalCHRM;
#endif
    pBuf->bHasSRGB = pData->bHasglobalSRGB;
#ifndef MNG_SKIPCHUNK_iCCP
    pBuf->bHasICCP = pData->bHasglobalICCP;
#endif
#ifndef MNG_SKIPCHUNK_bKGD
    pBuf->bHasBKGD = pData->bHasglobalBKGD;
#endif

#ifndef MNG_SKIPCHUNK_iCCP
    if (pBuf->iProfilesize)            /* drop possibly old ICC profile */
    {
      MNG_FREE (pData, pBuf->pProfile, pBuf->iProfilesize);
      pBuf->iProfilesize     = 0;
    }  
#endif

    if (pData->bHasglobalGAMA)         /* global gAMA present ? */
      pBuf->iGamma           = pData->iGlobalGamma;

#ifndef MNG_SKIPCHUNK_cHRM
    if (pData->bHasglobalCHRM)         /* global cHRM present ? */
    {
      pBuf->iWhitepointx     = pData->iGlobalWhitepointx;
      pBuf->iWhitepointy     = pData->iGlobalWhitepointy;
      pBuf->iPrimaryredx     = pData->iGlobalPrimaryredx;
      pBuf->iPrimaryredy     = pData->iGlobalPrimaryredy;
      pBuf->iPrimarygreenx   = pData->iGlobalPrimarygreenx;
      pBuf->iPrimarygreeny   = pData->iGlobalPrimarygreeny;
      pBuf->iPrimarybluex    = pData->iGlobalPrimarybluex;
      pBuf->iPrimarybluey    = pData->iGlobalPrimarybluey;
    }
#endif

    if (pData->bHasglobalSRGB)           /* global sRGB present ? */
      pBuf->iRenderingintent = pData->iGlobalRendintent;

#ifndef MNG_SKIPCHUNK_iCCP
    if (pData->bHasglobalICCP)           /* global iCCP present ? */
    {
      if (pData->iGlobalProfilesize)
      {
        MNG_ALLOC (pData, pBuf->pProfile, pData->iGlobalProfilesize);
        MNG_COPY  (pBuf->pProfile, pData->pGlobalProfile, pData->iGlobalProfilesize);
      }

      pBuf->iProfilesize     = pData->iGlobalProfilesize;
    }
#endif

#ifndef MNG_SKIPCHUNK_bKGD
    if (pData->bHasglobalBKGD)           /* global bKGD present ? */
    {
      pBuf->iBKGDred         = pData->iGlobalBKGDred;
      pBuf->iBKGDgreen       = pData->iGlobalBKGDgreen;
      pBuf->iBKGDblue        = pData->iGlobalBKGDblue;
    }
#endif
  }

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_RESET_OBJECTDETAILS, MNG_LC_END);
#endif

  return MNG_NOERROR;
}

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

#if !defined(MNG_NO_DELTA_PNG) || !defined(MNG_SKIPCHUNK_PAST) || !defined(MNG_SKIPCHUNK_MAGN)
mng_retcode mng_promote_imageobject (mng_datap  pData,
                                     mng_imagep pImage,
                                     mng_uint8  iBitdepth,
                                     mng_uint8  iColortype,
                                     mng_uint8  iFilltype)
{
  mng_retcode    iRetcode       = MNG_NOERROR;
  mng_imagedatap pBuf           = pImage->pImgbuf;
  mng_uint32     iW             = pBuf->iWidth;
  mng_uint32     iH             = pBuf->iHeight;
  mng_uint8p     pNewbuf;
  mng_uint32     iNewbufsize;
  mng_uint32     iNewrowsize;
  mng_uint32     iNewsamplesize = pBuf->iSamplesize;
  mng_uint32     iY;
  mng_uint8      iTempdepth;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_PROMOTE_IMGOBJECT, MNG_LC_START);
#endif

#ifdef MNG_NO_1_2_4BIT_SUPPORT
  if (iBitdepth < 8)
    iBitdepth=8;
  if (pBuf->iBitdepth < 8)
    pBuf->iBitdepth=8;
#endif
#ifdef MNG_NO_16BIT_SUPPORT
  if (iBitdepth > 8)
    iBitdepth=8;
  if (pBuf->iBitdepth > 8)
    pBuf->iBitdepth=8;
#endif

  pData->fPromoterow    = MNG_NULL;    /* init promotion fields */
  pData->fPromBitdepth  = MNG_NULL;
  pData->iPromColortype = iColortype;
  pData->iPromBitdepth  = iBitdepth;
  pData->iPromFilltype  = iFilltype;

  if (iBitdepth != pBuf->iBitdepth)    /* determine bitdepth promotion */
  {
    if (pBuf->iColortype == MNG_COLORTYPE_INDEXED)
      iTempdepth = 8;
    else
      iTempdepth = pBuf->iBitdepth;

#ifndef MNG_NO_DELTA_PNG
    if (iFilltype == MNG_FILLMETHOD_ZEROFILL)
    {
      switch (iTempdepth)
      {
#ifndef MNG_NO_1_2_4BIT_SUPPORT
        case 1 : {
                   switch (iBitdepth)
                   {
                     case  2 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_1_2;  break; }
                     case  4 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_1_4;  break; }
                     case  8 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_1_8;  break; }
#ifndef MNG_NO_16BIT_SUPPORT
                     case 16 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_1_16; break; }
#endif
                   }
                   break;
                 }
        case 2 : {
                   switch (iBitdepth)
                   {
                     case  4 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_2_4;  break; }
                     case  8 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_2_8;  break; }
#ifndef MNG_NO_16BIT_SUPPORT
                     case 16 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_2_16; break; }
#endif
                   }
                   break;
                 }
        case 4 : {
                   switch (iBitdepth)
                   {
                     case  8 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_4_8;  break; }
#ifndef MNG_NO_16BIT_SUPPORT
                     case 16 : { pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_4_16; break; }
#endif
                   }
                   break;
                 }
#endif /* MNG_NO_1_2_4BIT_SUPPORT */
        case 8 : {
#ifndef MNG_NO_16BIT_SUPPORT
                   if (iBitdepth == 16)
                     pData->fPromBitdepth = (mng_fptr)mng_promote_zerofill_8_16;
#endif
                   break;
                 }
      }
    }
    else
#endif
    {
      switch (iTempdepth)
      {
#ifndef MNG_NO_1_2_4BIT_SUPPORT
        case 1 : {
                   switch (iBitdepth)
                   {
                     case  2 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_1_2;  break; }
                     case  4 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_1_4;  break; }
                     case  8 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_1_8;  break; }
#ifndef MNG_NO_16BIT_SUPPORT
                     case 16 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_1_16; break; }
#endif
                   }
                   break;
                 }
        case 2 : {
                   switch (iBitdepth)
                   {
                     case  4 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_2_4;  break; }
                     case  8 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_2_8;  break; }
#ifndef MNG_NO_16BIT_SUPPORT
                     case 16 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_2_16; break; }
#endif
                   }
                   break;
                 }
        case 4 : {
                   switch (iBitdepth)
                   {
                     case  8 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_4_8;  break; }
#ifndef MNG_NO_16BIT_SUPPORT
                     case 16 : { pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_4_16; break; }
#endif
                   }
                   break;
                 }
#endif /* MNG_NO_1_2_4BIT_SUPPORT */
        case 8 : {
#ifndef MNG_NO_16BIT_SUPPORT
                   if (iBitdepth == 16)
                     pData->fPromBitdepth = (mng_fptr)mng_promote_replicate_8_16;
#endif
                   break;
                 }
      }
    }
  }
                                       /* g -> g */
  if ((pBuf->iColortype == MNG_COLORTYPE_GRAY) &&
      (iColortype == MNG_COLORTYPE_GRAY))
  {
    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                                 /* g -> ga */
  if ((pBuf->iColortype == MNG_COLORTYPE_GRAY) &&
      (iColortype == MNG_COLORTYPE_GRAYA))
  {
    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                                 /* g -> rgb */
  if ((pBuf->iColortype == MNG_COLORTYPE_GRAY) &&
      (iColortype == MNG_COLORTYPE_RGB))
  {
    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                                 /* g -> rgba */
  if ((pBuf->iColortype == MNG_COLORTYPE_GRAY) &&
      (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_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;