libmng_chunk_io.c

Linux下的基于X11的图形开发环境。

#endif
  {
    mng_imagep pImage;

    if (pData->bHasDHDR)               /* update delta image ? */
    {                                  /* store in object 0 ! */
      pImage = (mng_imagep)pData->pObjzero;
                                       /* store for color-processing routines */
      pImage->pImgbuf->iGamma   = mng_get_uint32 (pRawdata);
      pImage->pImgbuf->bHasGAMA = MNG_TRUE;
    }
    else
    {
      pImage = (mng_imagep)pData->pCurrentobj;

      if (!pImage)                     /* no object then dump it in obj 0 */
        pImage = (mng_imagep)pData->pObjzero;
                                       /* store for color-processing routines */
      pImage->pImgbuf->iGamma   = mng_get_uint32 (pRawdata);
      pImage->pImgbuf->bHasGAMA = MNG_TRUE;
    }
  }
  else
  {                                    /* store as global */
    if (iRawlen != 0)
      pData->iGlobalGamma = mng_get_uint32 (pRawdata);

    {                                  /* create an animation object */
      mng_retcode iRetcode = create_ani_gama (pData, (mng_bool)(iRawlen == 0),
                                              pData->iGlobalGamma);

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

#ifdef MNG_STORE_CHUNKS
  if (pData->bStorechunks)
  {                                    /* initialize storage */
    mng_retcode iRetcode = ((mng_chunk_headerp)pHeader)->fCreate (pData, pHeader, ppChunk);

    if (iRetcode)                      /* on error bail out */
      return iRetcode;
                                       /* store the fields */
    ((mng_gamap)*ppChunk)->bEmpty = (mng_bool)(iRawlen == 0);

    if (iRawlen)
      ((mng_gamap)*ppChunk)->iGamma = mng_get_uint32 (pRawdata);

  }
#endif /* MNG_STORE_CHUNKS */

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

  return MNG_NOERROR;                  /* done */
}

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

READ_CHUNK (read_chrm)
{
#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_READ_CHRM, MNG_LC_START)
#endif
                                       /* sequence checks */
#ifdef MNG_INCLUDE_JNG
  if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
      (!pData->bHasBASI) && (!pData->bHasDHDR) && (!pData->bHasJHDR))
#else
  if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
      (!pData->bHasBASI) && (!pData->bHasDHDR)    )
#endif
    MNG_ERROR (pData, MNG_SEQUENCEERROR)

#ifdef MNG_INCLUDE_JNG
  if ((pData->bHasIDAT) || (pData->bHasPLTE) || (pData->bHasJDAT) || (pData->bHasJDAA))
#else
  if ((pData->bHasIDAT) || (pData->bHasPLTE))
#endif
    MNG_ERROR (pData, MNG_SEQUENCEERROR)

#ifdef MNG_INCLUDE_JNG
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
  {                                    /* length must be exactly 32 */
    if (iRawlen != 32)
      MNG_ERROR (pData, MNG_INVALIDLENGTH)
  }
  else
  {                                    /* length must be empty or exactly 32 */
    if ((iRawlen != 0) && (iRawlen != 32))
      MNG_ERROR (pData, MNG_INVALIDLENGTH)
  }

#ifdef MNG_INCLUDE_JNG
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
    pData->bHasCHRM = MNG_TRUE;        /* indicate we've got it */
  else
    pData->bHasglobalCHRM = (mng_bool)(iRawlen != 0);

#ifdef MNG_SUPPORT_DISPLAY
  {
    mng_uint32 iWhitepointx,   iWhitepointy;
    mng_uint32 iPrimaryredx,   iPrimaryredy;
    mng_uint32 iPrimarygreenx, iPrimarygreeny;
    mng_uint32 iPrimarybluex,  iPrimarybluey;

    iWhitepointx   = mng_get_uint32 (pRawdata);
    iWhitepointy   = mng_get_uint32 (pRawdata+4);
    iPrimaryredx   = mng_get_uint32 (pRawdata+8);
    iPrimaryredy   = mng_get_uint32 (pRawdata+12);
    iPrimarygreenx = mng_get_uint32 (pRawdata+16);
    iPrimarygreeny = mng_get_uint32 (pRawdata+20);
    iPrimarybluex  = mng_get_uint32 (pRawdata+24);
    iPrimarybluey  = mng_get_uint32 (pRawdata+28);

#ifdef MNG_INCLUDE_JNG
    if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
    if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
    {
      mng_imagep     pImage;
      mng_imagedatap pBuf;

      if (pData->bHasDHDR)             /* update delta image ? */
      {                                /* store it in object 0 ! */
        pImage = (mng_imagep)pData->pObjzero;

        pBuf = pImage->pImgbuf;        /* address object buffer */
        pBuf->bHasCHRM = MNG_TRUE;     /* and tell it it's got a CHRM now */
                                       /* store for color-processing routines */
        pBuf->iWhitepointx   = iWhitepointx;
        pBuf->iWhitepointy   = iWhitepointy;
        pBuf->iPrimaryredx   = iPrimaryredx;
        pBuf->iPrimaryredy   = iPrimaryredy;
        pBuf->iPrimarygreenx = iPrimarygreenx;
        pBuf->iPrimarygreeny = iPrimarygreeny;
        pBuf->iPrimarybluex  = iPrimarybluex;
        pBuf->iPrimarybluey  = iPrimarybluey;
      }
      else
      {
        pImage = (mng_imagep)pData->pCurrentobj;

        if (!pImage)                   /* no object then dump it in obj 0 */
          pImage = (mng_imagep)pData->pObjzero;

        pBuf = pImage->pImgbuf;        /* address object buffer */
        pBuf->bHasCHRM = MNG_TRUE;     /* and tell it it's got a CHRM now */
                                       /* store for color-processing routines */
        pBuf->iWhitepointx   = iWhitepointx;
        pBuf->iWhitepointy   = iWhitepointy;
        pBuf->iPrimaryredx   = iPrimaryredx;
        pBuf->iPrimaryredy   = iPrimaryredy;
        pBuf->iPrimarygreenx = iPrimarygreenx;
        pBuf->iPrimarygreeny = iPrimarygreeny;
        pBuf->iPrimarybluex  = iPrimarybluex;
        pBuf->iPrimarybluey  = iPrimarybluey;
      }
    }
    else
    {                                  /* store as global */
      if (iRawlen != 0)
      {
        pData->iGlobalWhitepointx   = iWhitepointx;
        pData->iGlobalWhitepointy   = iWhitepointy;
        pData->iGlobalPrimaryredx   = iPrimaryredx;
        pData->iGlobalPrimaryredy   = iPrimaryredy;
        pData->iGlobalPrimarygreenx = iPrimarygreenx;
        pData->iGlobalPrimarygreeny = iPrimarygreeny;
        pData->iGlobalPrimarybluex  = iPrimarybluex;
        pData->iGlobalPrimarybluey  = iPrimarybluey;
      }

      {                                /* create an animation object */
        mng_retcode iRetcode = create_ani_chrm (pData, (mng_bool)(iRawlen == 0),
                                                iWhitepointx,   iWhitepointy,
                                                iPrimaryredx,   iPrimaryredy,
                                                iPrimarygreenx, iPrimarygreeny,
                                                iPrimarybluex,  iPrimarybluey);

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

#ifdef MNG_STORE_CHUNKS
  if (pData->bStorechunks)
  {                                    /* initialize storage */
    mng_retcode iRetcode = ((mng_chunk_headerp)pHeader)->fCreate (pData, pHeader, ppChunk);

    if (iRetcode)                      /* on error bail out */
      return iRetcode;
                                       /* store the fields */
    ((mng_chrmp)*ppChunk)->bEmpty = (mng_bool)(iRawlen == 0);

    if (iRawlen)
    {
      ((mng_chrmp)*ppChunk)->iWhitepointx = mng_get_uint32 (pRawdata);
      ((mng_chrmp)*ppChunk)->iWhitepointy = mng_get_uint32 (pRawdata+4);
      ((mng_chrmp)*ppChunk)->iRedx        = mng_get_uint32 (pRawdata+8);
      ((mng_chrmp)*ppChunk)->iRedy        = mng_get_uint32 (pRawdata+12);
      ((mng_chrmp)*ppChunk)->iGreenx      = mng_get_uint32 (pRawdata+16);
      ((mng_chrmp)*ppChunk)->iGreeny      = mng_get_uint32 (pRawdata+20);
      ((mng_chrmp)*ppChunk)->iBluex       = mng_get_uint32 (pRawdata+24);
      ((mng_chrmp)*ppChunk)->iBluey       = mng_get_uint32 (pRawdata+28);
    }  
  }
#endif /* MNG_STORE_CHUNKS */

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

  return MNG_NOERROR;                  /* done */
}

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

READ_CHUNK (read_srgb)
{
#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_READ_SRGB, MNG_LC_START)
#endif
                                       /* sequence checks */
#ifdef MNG_INCLUDE_JNG
  if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
      (!pData->bHasBASI) && (!pData->bHasDHDR) && (!pData->bHasJHDR))
#else
  if ((!pData->bHasMHDR) && (!pData->bHasIHDR) &&
      (!pData->bHasBASI) && (!pData->bHasDHDR)    )
#endif
    MNG_ERROR (pData, MNG_SEQUENCEERROR)

#ifdef MNG_INCLUDE_JNG
  if ((pData->bHasIDAT) || (pData->bHasPLTE) || (pData->bHasJDAT) || (pData->bHasJDAA))
#else
  if ((pData->bHasIDAT) || (pData->bHasPLTE))
#endif
    MNG_ERROR (pData, MNG_SEQUENCEERROR)

#ifdef MNG_INCLUDE_JNG
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
  {                                    /* length must be exactly 1 */
    if (iRawlen != 1)
      MNG_ERROR (pData, MNG_INVALIDLENGTH)
  }
  else
  {                                    /* length must be empty or exactly 1 */
    if ((iRawlen != 0) && (iRawlen != 1))
      MNG_ERROR (pData, MNG_INVALIDLENGTH)
  }

#ifdef MNG_INCLUDE_JNG
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
    pData->bHasSRGB = MNG_TRUE;        /* indicate we've got it */
  else
    pData->bHasglobalSRGB = (mng_bool)(iRawlen != 0);

#ifdef MNG_SUPPORT_DISPLAY
#ifdef MNG_INCLUDE_JNG
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR) || (pData->bHasJHDR))
#else
  if ((pData->bHasIHDR) || (pData->bHasBASI) || (pData->bHasDHDR))
#endif
  {
    mng_imagep pImage;

    if (pData->bHasDHDR)               /* update delta image ? */
    {                                  /* store in object 0 ! */
      pImage = (mng_imagep)pData->pObjzero;
                                       /* store for color-processing routines */
      pImage->pImgbuf->iRenderingintent = *pRawdata;
      pImage->pImgbuf->bHasSRGB         = MNG_TRUE;
    }
    else
    {
      pImage = (mng_imagep)pData->pCurrentobj;

      if (!pImage)                     /* no object then dump it in obj 0 */
        pImage = (mng_imagep)pData->pObjzero;
                                       /* store for color-processing routines */
      pImage->pImgbuf->iRenderingintent = *pRawdata;
      pImage->pImgbuf->bHasSRGB         = MNG_TRUE;
    }
  }
  else
  {                                    /* store as global */
    if (iRawlen != 0)
      pData->iGlobalRendintent = *pRawdata;

    {                                  /* create an animation object */
      mng_retcode iRetcode = create_ani_srgb (pData, (mng_bool)(iRawlen == 0),
                                              pData->iGlobalRendintent);

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

#ifdef MNG_STORE_CHUNKS
  if (pData->bStorechunks)
  {                                    /* initialize storage */
    mng_retcode iRetcode = ((mng_chunk_headerp)pHeader)->fCreate (pData, pHeader, ppChunk);

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