L_DicomSetOverlayAttributes

#include "ltdic.h"

L_UINT16 EXT_FUNCTION L_DicomSetOverlayAttributes(hDS, uOverlayIndex, pOverlayAttributes, uFlags)

HDICOMDS hDS;	/* a DICOM handle */
L_UINT uOverlayIndex;	/* the overlay index */
pOVERLAYATTRIBUTES pOverlayAttributes;	/* pointer to the overlay attributes structure */
L_UINT uFlags;	/* flags that determine function behavior */

Sets overlay attributes for a certain index.

Parameter	Description
hDS	A DICOM handle.
uOverlayIndex	The index of the overlay for which to set the attributes. This index is zero-based.
pOverlayAttributes	Pointer to a structure containing the overlay attributes to set.
uFlags	Binary flags that determine the behavior of the function. Possible values are:
	Value	Meaning
	SET_OVERLAY_ATTRIB_NO_OVERRIDE	Set this flag if you don’t want to update an overlay that already exists in the dataset.

Returns

0	The function was successful.
>0	An error occurred. Refer to Return Codes.

Comments

Before calling this function, initialize pOverlayAttributes->uStructSize to be sizeof(OVERLAYATTRIBUTES) and initialize all the OVERLAYATTRIBUTES structure members.

Required DLLs and Libraries

LTDIC

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

See Also

Functions:	L_DicomGetOverlayCount, L_DicomGetOverlayAttributes, L_DicomGetOverlayActivationLayer, L_DicomGetOverlayBitmap, L_DicomGetOverlayBitmapList, L_DicomSetOverlayBitmap, L_DicomSetOverlayBitmapList, L_DicomDeleteOverlay
Topics:	Overlays Overview
	Overlays

Example

//This function will delete all overlays in a dataset
L_UINT16 DeleteAllOverlays(HDICOMDS hDicomDS) // handle to Dicom DS
{
   L_UINT   uOverlayCount = 0;
   L_UINT16 uRet;
   L_UINT16 uOverlayIndex;

   uRet  = L_DicomGetOverlayCount(hDicomDS,&uOverlayCount);
   if(DICOM_SUCCESS != uRet)
   {
      return uRet;
   }

   for(uOverlayIndex = 0 ; uOverlayIndex < uOverlayCount ; uOverlayIndex++)
   {
      uRet = L_DicomDeleteOverlay(hDicomDS,uOverlayIndex,0);
      if(DICOM_SUCCESS != uRet)
      {
         return uRet;
      }
   }
   return DICOM_SUCCESS;
}

// This function will store the overlays associated
// with a bitmap handle inside the DICOM dataset
L_UINT16 SaveOverlaysFromBitmap(HDICOMDS hDicomDS, pBITMAPHANDLE pBitmap, L_UINT uFlags)
{
   OVERLAYATTRIBUTES OverlayAttributes;
   BITMAPHANDLE      OverlayBitmap;
   L_UINT            uOverlayCount;
   L_UINT            uOverlayIndex;
   L_INT             nLEADRet;
   L_UINT16          uDICOMRet;

   //(1)Sanity Check !
   if((NULL == pBitmap) || (NULL == hDicomDS))
   {
      return DICOM_ERROR_NULL_PTR;
   }

   //(2)Do we have any overlays at all ?
   nLEADRet = L_GetOverlayCount(pBitmap, &uOverlayCount, 0);
   if(SUCCESS != nLEADRet)
   {
      return DICOM_ERROR_PARAMETER;
   }

   // If no overlays just return
   if(0 == uOverlayCount)
   {
      return DICOM_SUCCESS;
   }

   //(3)Blow away all the overlays in the file
   uDICOMRet = DeleteAllOverlays(hDicomDS);
   if(DICOM_SUCCESS != uDICOMRet)
   {
      return uDICOMRet;
   }

   //(4) Loop through the overlays and add them into the DICOM file
   for(uOverlayIndex = 0 ; uOverlayIndex < uOverlayCount ; uOverlayIndex++)
   {
      memset(&OverlayAttributes    , 0 , sizeof(OVERLAYATTRIBUTES));
      memset(&OverlayBitmap        , 0 , sizeof(BITMAPHANDLE));

      // Get overlay attributes
      nLEADRet = L_GetOverlayAttributes(pBitmap, uOverlayIndex, &OverlayAttributes, sizeof(OverlayAttributes), OVERLAYATTRIBUTES_ORIGIN | OVERLAYATTRIBUTES_FLAGS | OVERLAYATTRIBUTES_BITINDEX | OVERLAYATTRIBUTES_DICOM);
      if(SUCCESS != nLEADRet)
      {
         return DICOM_ERROR_PARAMETER;
      }

      // Set overlay attributes inside DICOM
      uDICOMRet = L_DicomSetOverlayAttributes(hDicomDS,uOverlayIndex,&OverlayAttributes,0);
      if(DICOM_SUCCESS != uDICOMRet)
      {
         return uDICOMRet;
      }

      // burn overlays which need to be part of the image
      if(OverlayAttributes.uFlags &OVERLAY_USEBITPLANE)
      {
         nLEADRet = L_UpdateBitmapOverlayBits(pBitmap, uOverlayIndex, SETOVERLAYBITS_FROMOVERLAY);
         if(SUCCESS != nLEADRet)
         {
            return DICOM_ERROR_PARAMETER;
         }
      }

      // Get the overlay data (if it's not part of the image)
      nLEADRet = L_GetOverlayBitmap(pBitmap, uOverlayIndex, &OverlayBitmap, sizeof(BITMAPHANDLE), OVERLAY_NOCOPY);
      if(SUCCESS != nLEADRet)
      {
         return DICOM_ERROR_PARAMETER;
      }

      // Set overlay data into DICOM
      uDICOMRet = L_DicomSetOverlayBitmap(hDicomDS,uOverlayIndex,&OverlayBitmap,0);
      if(DICOM_SUCCESS != uDICOMRet)
      {
         return uDICOMRet;
      }
   }

   return DICOM_SUCCESS;
}