LDicomDS::SetOverlayAttributes

#include "ltdic.h"

L_UINT16 LDicomDS::SetOverlayAttributes (uOverlayIndex,pOverlayAttributes,uFlags)

L_UINT uOverlayIndex;	/* index */
pOVERLAYATTRIBUTES pOverlayAttributes;	/* pointer to a structure */
L_UINT uFlags;	/* flags */

Sets overlay attributes for a certain index.

Parameter	Description
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 dont 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:	LDicomDS::GetOverlayCount, LDicomDS::GetOverlayAttributes, LDicomDS::GetOverlayActivationLayer, LDicomDS::GetOverlayBitmap, LDicomDS::GetOverlayBitmapList, LDicomDS::SetOverlayBitmap, LDicomDS::SetOverlayBitmapList, LDicomDS::DeleteOverlay
Topics:	Overlays Overview
	Overlays

Example

// This function will delete all overlays in a dataset.
L_UINT16 DeleteAllOverlays(LDicomDS &InDS)
{
   L_UINT16 nRet;
   L_UINT   uOverlayCount = 0;
   L_UINT16 uOverlayIndex;
   nRet  = InDS.GetOverlayCount (&uOverlayCount); 
   if(DICOM_SUCCESS != nRet) 
   {
      return nRet;   
   }
   for(uOverlayIndex = 0 ; uOverlayIndex < uOverlayCount ; uOverlayIndex++)
   {
      nRet = InDS.DeleteOverlay (uOverlayIndex,0); 
      if(DICOM_SUCCESS != nRet) 
      {
         return nRet; 
      }
   }
   return DICOM_SUCCESS; 
}
// This function will store the overlays associated 
// with a bitmap handle inside the DICOM dataset
L_INT LDicomDS_SetOverlayAttributesExample(LDicomDS &InDS, pBITMAPHANDLE pBitmap)
{
   OVERLAYATTRIBUTES OverlayAttributes; 
   BITMAPHANDLE      OverlayBitmap; 
   L_UINT            uOverlayCount; 
   L_UINT            uOverlayIndex; 
   L_INT             nLEADRet; 
   L_UINT16          uDICOMRet; 
   //(1)Sanity Check ! 
   if(NULL == pBitmap) 
   {
      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(InDS); 
   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 = InDS.SetOverlayAttributes (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 = InDS.SetOverlayBitmap (uOverlayIndex,&OverlayBitmap,0); 
      if(DICOM_SUCCESS != uDICOMRet) 
      {
         return uDICOMRet; 
      }
   }
   return DICOM_SUCCESS; 
}