libmng_object_prc.c

Linux下的基于X11的图形开发环境。

      pSource->iPosy = pSource->iPosy + iLocationy;
    }
  }

  if (iId)                             /* not for object 0 */
  {                                    /* find previous lower object-id */
    pPrev = (mng_imagep)pData->pLastimgobj;
    while ((pPrev) && (pPrev->iId > iId))
      pPrev = (mng_imagep)pPrev->sHeader.pPrev;
                                       /* different from current ? */
    if (pPrev != (mng_imagep)pSource->sHeader.pPrev)
    {
      if (pSource->sHeader.pPrev)      /* unlink from current position !! */
        ((mng_imagep)pSource->sHeader.pPrev)->sHeader.pNext = pSource->sHeader.pNext;
      else
        pData->pFirstimgobj                                 = pSource->sHeader.pNext;

      if (pSource->sHeader.pNext)
        ((mng_imagep)pSource->sHeader.pNext)->sHeader.pPrev = pSource->sHeader.pPrev;
      else
        pData->pLastimgobj                                  = pSource->sHeader.pPrev;

      if (pPrev)                       /* found the previous ? */
      {                                /* than link it in place */
        pSource->sHeader.pPrev = pPrev;
        pSource->sHeader.pNext = pPrev->sHeader.pNext;
        pPrev->sHeader.pNext   = pSource;
      }
      else                             /* if not found, it becomes the first ! */
      {
        pSource->sHeader.pNext = pData->pFirstimgobj;
        pData->pFirstimgobj    = pSource;
      }

      pNext                    = (mng_imagep)pSource->sHeader.pNext;

      if (pNext)
        pNext->sHeader.pPrev   = pSource;
      else
        pData->pLastimgobj     = pSource;

    }
  }

  pSource->iId = iId;                  /* now set the new id! */

  if (bAbstract)                       /* force it to abstract ? */
    pSource->pImgbuf->bConcrete = MNG_FALSE;

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

  return MNG_NOERROR;
}

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

mng_retcode reset_object_details (mng_datap  pData,
                                  mng_imagep pImage,
                                  mng_uint32 iWidth,
                                  mng_uint32 iHeight,
                                  mng_uint8  iBitdepth,
                                  mng_uint8  iColortype,
                                  mng_uint8  iCompression,
                                  mng_uint8  iFilter,
                                  mng_uint8  iInterlace,
                                  mng_bool   bResetall)
{
  mng_imagedatap pBuf  = pImage->pImgbuf;
  mng_uint32     iSamplesize = 0;
  mng_uint32     iRowsize;
  mng_uint32     iImgdatasize;

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

  pBuf->iWidth         = iWidth;       /* set buffer characteristics */
  pBuf->iHeight        = iHeight;
  pBuf->iBitdepth      = iBitdepth;
  pBuf->iColortype     = iColortype;
  pBuf->iCompression   = iCompression;
  pBuf->iFilter        = iFilter;
  pBuf->iInterlace     = iInterlace;
  pBuf->iAlphabitdepth = 0;
                                       /* determine samplesize from color_type/bit_depth */
  switch (iColortype)                  /* for < 8-bit samples we just reserve 8 bits */
  {
    case  0  : ;                       /* gray */
    case  8  : {                       /* JPEG gray */
                 if (iBitdepth > 8)
                   iSamplesize = 2;
                 else
                   iSamplesize = 1;

                 break;
               }
    case  2  : ;                       /* rgb */
    case 10  : {                       /* JPEG rgb */
                 if (iBitdepth > 8)
                   iSamplesize = 6;
                 else
                   iSamplesize = 3;

                 break;
               }
    case  3  : {                       /* indexed */
                 iSamplesize = 1;
                 break;
               }
    case  4  : ;                       /* gray+alpha */
    case 12  : {                       /* JPEG gray+alpha */
                 if (iBitdepth > 8)
                   iSamplesize = 4;
                 else
                   iSamplesize = 2;

                 break;
               }
    case  6  : ;                       /* rgb+alpha */
    case 14  : {                       /* JPEG rgb+alpha */
                 if (iBitdepth > 8)
                   iSamplesize = 8;
                 else
                   iSamplesize = 4;

                 break;
               }
  }

  iRowsize     = iSamplesize * iWidth;
  iImgdatasize = iRowsize    * iHeight;
                                       /* buffer size changed ? */
  if (iImgdatasize != pBuf->iImgdatasize)
  {                                    /* drop the old one */
    MNG_FREE (pData, pBuf->pImgdata, pBuf->iImgdatasize)

    if (iImgdatasize)                  /* allocate new sample-buffer ? */
      MNG_ALLOC (pData, pBuf->pImgdata, iImgdatasize)
  }

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

  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;
  }

  if (bResetall)                       /* reset the other characteristics ? */
  {
    pBuf->bHasPLTE = MNG_FALSE;
    pBuf->bHasTRNS = MNG_FALSE;
    pBuf->bHasGAMA = pData->bHasglobalGAMA;
    pBuf->bHasCHRM = pData->bHasglobalCHRM;
    pBuf->bHasSRGB = pData->bHasglobalSRGB;
    pBuf->bHasICCP = pData->bHasglobalICCP;
    pBuf->bHasBKGD = pData->bHasglobalBKGD;

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

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

    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;
    }

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

    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;
    }

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

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

  return MNG_NOERROR;
}

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

mng_retcode promote_imageobject (mng_datap  pData,
                                 mng_imagep pImage,
                                 mng_uint8  iBitdepth,
                                 mng_uint8  iColortype,
                                 mng_uint8  iFilltype)
{
  mng_uint8p     pNewbuf;
  mng_uint32     iNewbufsize;
  mng_uint32     iNewrowsize;
  mng_uint32     iNewsamplesize;
  mng_uint32     iX, iY;
  mng_uint8p     pSrcline, pDstline;
  mng_uint8      iB;
  mng_imagedatap pBuf = pImage->pImgbuf;
  mng_uint32     iW   = pBuf->iWidth;
  mng_uint32     iH   = pBuf->iHeight;

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

  if ((pBuf->iColortype == 3) && (iColortype == 2))
  {                                    /* indexed -> rgb */
    iNewsamplesize = 3;
    iNewrowsize    = iW * iNewsamplesize;
    iNewbufsize    = iH * iNewrowsize;

    MNG_ALLOC (pData, pNewbuf, iNewbufsize)

    pSrcline = pBuf->pImgdata;
    pDstline = pNewbuf;

    for (iY = 0; iY < iH; iY++)
    {
      for (iX = 0; iX < iW; iX++)
      {
        iB = *pSrcline;

        if ((mng_uint32)iB < pBuf->iPLTEcount)
        {
          *pDstline     = pBuf->aPLTEentries [iB].iRed;
          *(pDstline+1) = pBuf->aPLTEentries [iB].iGreen;
          *(pDstline+2) = pBuf->aPLTEentries [iB].iBlue;
        }  

        pSrcline++;
        pDstline += 3;
      }
    }

    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->bHasTRNS     = MNG_FALSE;
  }
  else
  if ((pBuf->iColortype == 3) && (iColortype == 6))
  {                                    /* indexed -> rgba */
    iNewsamplesize = 4;
    iNewrowsize    = iW * iNewsamplesize;
    iNewbufsize    = iH * iNewrowsize;

    MNG_ALLOC (pData, pNewbuf, iNewbufsize)

    pSrcline = pBuf->pImgdata;
    pDstline = pNewbuf;

    for (iY = 0; iY < iH; iY++)
    {
      for (iX = 0; iX < iW; iX++)
      {
        iB = *pSrcline;

        if ((mng_uint32)iB < pBuf->iPLTEcount)
        {
          *pDstline       = pBuf->aPLTEentries [iB].iRed;
          *(pDstline+1)   = pBuf->aPLTEentries [iB].iGreen;
          *(pDstline+2)   = pBuf->aPLTEentries [iB].iBlue;

          if ((mng_uint32)iB < pBuf->iTRNScount)
            *(pDstline+3) = pBuf->aTRNSentries [iB];
          else
            *(pDstline+3) = 255;
        }

        pSrcline++;
        pDstline += 4;
      }
    }

    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->bHasTRNS     = MNG_FALSE;
  }
  else
  {

    /* TODO: other promotion */

  }

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

  return MNG_NOERROR;
}

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

mng_retcode 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;