libmng_display.c

Linux下的基于X11的图形开发环境。

        return iRetcode;
    }
  }

  pData->pRetrieveobj = pImage;        /* so retrieve-row and color-correction can find it */

  if (!bLayeradvanced)                 /* need to advance the layer ? */
  {
    mng_imagep pSave    = pData->pCurrentobj;
    pData->pCurrentobj  = pImage;
    next_layer (pData);                /* advance to next layer */
    pData->pCurrentobj  = pSave;
  }
                                       /* need to restore the background ? */
  if ((!pData->bTimerset) && (pData->bRestorebkgd))
  {
    mng_imagep pSave    = pData->pCurrentobj;
    pData->pCurrentobj  = pImage;
    pData->bRestorebkgd = MNG_FALSE;
    iRetcode            = load_bkgdlayer (pData);
    pData->pCurrentobj  = pSave;

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

    if (pData->bRunning)
      pData->iLayerseq++;              /* and it counts as a layer then ! */
  }
                                       /* actively running ? */
  if ((pData->bRunning) && (!pData->bFreezing))
  {
    if (!pData->bTimerset)             /* all systems still go ? */
    {
      pData->iBreakpoint = 0;          /* let's make absolutely sure... */
                                       /* anything to display ? */
      if ((pData->iDestr >= pData->iDestl) && (pData->iDestb >= pData->iDestt))
      {
        mng_int32 iY;

        set_display_routine (pData);   /* determine display routine */
                                       /* and image-buffer retrieval routine */
        switch (pImage->pImgbuf->iColortype)
        {
          case  0 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_g16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_g8;

                      pData->bIsOpaque      = (mng_bool)(!pImage->pImgbuf->bHasTRNS);
                      break;
                    }

          case  2 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_rgb16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_rgb8;

                      pData->bIsOpaque      = (mng_bool)(!pImage->pImgbuf->bHasTRNS);
                      break;
                    }


          case  3 : { pData->fRetrieverow   = (mng_fptr)retrieve_idx8;
                      pData->bIsOpaque      = (mng_bool)(!pImage->pImgbuf->bHasTRNS);
                      break;
                    }


          case  4 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_ga16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_ga8;

                      pData->bIsOpaque      = MNG_FALSE;
                      break;
                    }


          case  6 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_rgba16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_rgba8;

                      pData->bIsOpaque      = MNG_FALSE;
                      break;
                    }

          case  8 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_g16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_g8;

                      pData->bIsOpaque      = MNG_TRUE;
                      break;
                    }

          case 10 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_rgb16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_rgb8;

                      pData->bIsOpaque      = MNG_TRUE;
                      break;
                    }


          case 12 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_ga16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_ga8;

                      pData->bIsOpaque      = MNG_FALSE;
                      break;
                    }


          case 14 : { if (pImage->pImgbuf->iBitdepth > 8)
                        pData->fRetrieverow = (mng_fptr)retrieve_rgba16;
                      else
                        pData->fRetrieverow = (mng_fptr)retrieve_rgba8;

                      pData->bIsOpaque      = MNG_FALSE;
                      break;
                    }

        }

        pData->iPass       = -1;       /* these are the object's dimensions now */
        pData->iRow        = pData->iSourcet;
        pData->iRowinc     = 1;
        pData->iCol        = 0;
        pData->iColinc     = 1;
        pData->iRowsamples = pImage->pImgbuf->iWidth;
        pData->iRowsize    = pData->iRowsamples << 2;
        pData->bIsRGBA16   = MNG_FALSE;
                                       /* adjust for 16-bit object ? */
        if (pImage->pImgbuf->iBitdepth > 8)
        {
          pData->bIsRGBA16 = MNG_TRUE;
          pData->iRowsize  = pData->iRowsamples << 3;
        }

        pData->fCorrectrow = MNG_NULL; /* default no color-correction */

#ifdef MNG_NO_CMS
        iRetcode = MNG_NOERROR;
#else
#if defined(MNG_FULL_CMS)              /* determine color-management routine */
        iRetcode = init_full_cms_object   (pData);
#elif defined(MNG_GAMMA_ONLY)
        iRetcode = init_gamma_only_object (pData);
#elif defined(MNG_APP_CMS)
        iRetcode = init_app_cms_object    (pData);
#endif
        if (iRetcode)                  /* on error bail out */
          return iRetcode;
#endif /* MNG_NO_CMS */
                                       /* get a temporary row-buffer */
        MNG_ALLOC (pData, pData->pRGBArow, pData->iRowsize)

        iY = pData->iSourcet;          /* this is where we start */

        while ((!iRetcode) && (iY < pData->iSourceb))
        {                              /* get a row */
          iRetcode = ((mng_retrieverow)pData->fRetrieverow) (pData);
                                       /* color correction ? */
          if ((!iRetcode) && (pData->fCorrectrow))
            iRetcode = ((mng_correctrow)pData->fCorrectrow) (pData);

          if (!iRetcode)               /* so... display it */
            iRetcode = ((mng_displayrow)pData->fDisplayrow) (pData);

          if (!iRetcode)               /* adjust variables for next row */
            iRetcode = next_row (pData);

          iY++;                        /* and next line */
        }
                                       /* drop the temporary row-buffer */
        MNG_FREE (pData, pData->pRGBArow, pData->iRowsize)

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

#if defined(MNG_INCLUDE_LCMS)          /* cleanup cms stuff */
        iRetcode = mng_clear_cms (pData);

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

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

  return MNG_NOERROR;                  /* whehehe, this is good ! */
}

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

mng_retcode execute_delta_image (mng_datap  pData,
                                 mng_imagep pTarget,
                                 mng_imagep pDelta)
{
  mng_imagedatap pBuftarget = pTarget->pImgbuf;
  mng_imagedatap pBufdelta  = pDelta->pImgbuf;
  mng_uint32     iY;
  mng_retcode    iRetcode;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_EXECUTE_DELTA_IMAGE, MNG_LC_START)
#endif
                                       /* actively running ? */
  if ((pData->bRunning) && (!pData->bFreezing))
  {
    if (pBufdelta->bHasPLTE)           /* palette in delta ? */
    {
      mng_uint32 iX;
                                       /* new palette larger than old one ? */
      if ((!pBuftarget->bHasPLTE) || (pBuftarget->iPLTEcount < pBufdelta->iPLTEcount))
        pBuftarget->iPLTEcount = pBufdelta->iPLTEcount;
                                       /* it's definitely got a PLTE now */
      pBuftarget->bHasPLTE = MNG_TRUE;

      for (iX = 0; iX < pBufdelta->iPLTEcount; iX++)
      {
        pBuftarget->aPLTEentries[iX].iRed   = pBufdelta->aPLTEentries[iX].iRed;
        pBuftarget->aPLTEentries[iX].iGreen = pBufdelta->aPLTEentries[iX].iGreen;
        pBuftarget->aPLTEentries[iX].iBlue  = pBufdelta->aPLTEentries[iX].iBlue;
      }
    }

    if (pBufdelta->bHasTRNS)           /* cheap transparency in delta ? */
    {
      switch (pData->iColortype)       /* drop it into the target */
      {
        case 0: {                      /* gray */
                  pBuftarget->iTRNSgray  = pBufdelta->iTRNSgray;
                  pBuftarget->iTRNSred   = 0;
                  pBuftarget->iTRNSgreen = 0;
                  pBuftarget->iTRNSblue  = 0;
                  pBuftarget->iTRNScount = 0;
                  break;
                }
        case 2: {                      /* rgb */
                  pBuftarget->iTRNSgray  = 0;
                  pBuftarget->iTRNSred   = pBufdelta->iTRNSred;
                  pBuftarget->iTRNSgreen = pBufdelta->iTRNSgreen;
                  pBuftarget->iTRNSblue  = pBufdelta->iTRNSblue;
                  pBuftarget->iTRNScount = 0;
                  break;
                }
        case 3: {                      /* indexed */
                  pBuftarget->iTRNSgray  = 0;
                  pBuftarget->iTRNSred   = 0;
                  pBuftarget->iTRNSgreen = 0;
                  pBuftarget->iTRNSblue  = 0;
                                       /* existing range smaller than new one ? */
                  if ((!pBuftarget->bHasTRNS) || (pBuftarget->iTRNScount < pBufdelta->iTRNScount))
                    pBuftarget->iTRNScount = pBufdelta->iTRNScount;

                  MNG_COPY (pBuftarget->aTRNSentries, pBufdelta->aTRNSentries, pBufdelta->iTRNScount)
                  break;
                }
      }

      pBuftarget->bHasTRNS = MNG_TRUE; /* tell it it's got a tRNS now */
    }

    if (pBufdelta->bHasBKGD)           /* bkgd in source ? */
    {                                  /* drop it onto the target */
      pBuftarget->bHasBKGD   = MNG_TRUE;
      pBuftarget->iBKGDindex = pBufdelta->iBKGDindex;
      pBuftarget->iBKGDgray  = pBufdelta->iBKGDgray;
      pBuftarget->iBKGDred   = pBufdelta->iBKGDred;
      pBuftarget->iBKGDgreen = pBufdelta->iBKGDgreen;
      pBuftarget->iBKGDblue  = pBufdelta->iBKGDblue;
    }

    if (pBufdelta->bHasGAMA)           /* gamma in source ? */
    {
      pBuftarget->bHasGAMA = MNG_TRUE; /* drop it onto the target */
      pBuftarget->iGamma   = pBufdelta->iGamma;
    }

    if (pBufdelta->bHasCHRM)           /* chroma in delta ? */
    {                                  /* drop it onto the target */
      pBuftarget->bHasCHRM       = MNG_TRUE;
      pBuftarget->iWhitepointx   = pBufdelta->iWhitepointx;
      pBuftarget->iWhitepointy   = pBufdelta->iWhitepointy;
      pBuftarget->iPrimaryredx   = pBufdelta->iPrimaryredx;
      pBuftarget->iPrimaryredy   = pBufdelta->iPrimaryredy;
      pBuftarget->iPrimarygreenx = pBufdelta->iPrimarygreenx;
      pBuftarget->iPrimarygreeny = pBufdelta->iPrimarygreeny;
      pBuftarget->iPrimarybluex  = pBufdelta->iPrimarybluex;