L_AnnLoadMemory

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#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnLoadMemory(pMem, uMemSize, phObject, pLoadOptions)

L_UCHAR *pMem;	/* pointer to the file in memory to be loaded */
L_SIZE_T uMemSize;	/* size of the file in memory (in bytes) */
pHANNOBJECT phObject;	/* address of the variable to be updated */
pLOADFILEOPTION pLoadOptions;	/* pointer to optional extended load options */

Loads an annotation from a file that is stored in memory.

Parameter	Description
pMem	Pointer to the file in memory to be loaded.
uMemSize	Size of the file in memory (in bytes).
phObject	Address of the variable to be updated with the handle to the container object of the loaded annotations.
pLoadOptions	Pointer to optional extended load options. Pass NULL to use the default load options.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

Before calling this function, you must declare a variable of data type HANNOBJECT. Then, pass the address of the variable in the phObject parameter. This function will update the variable with the handle to the container object of the loaded annotations.

You can load annotations from multi-page TIF files using the pLoadOptions parameter.

If you have saved a memory handle to a tag in TIF or WANG format, using L_AnnSaveMemory, you must write the memory handle to the tag into a file using L_SetTag and L_SaveBitmapMemory before you can load it using this function

For more information about loading and pasting automated annotations, refer to Loading and Pasting Automated Annotations.

If this function returns SUCCESS and phObject is updated with NULL, there are no annotation objects to load.

Required DLLs and Libraries

LTANN

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

Platforms

Win32, x64.

See Also

Functions:	L_AnnDeletePage, L_AnnDeletePageMemory, L_AnnDeletePageOffset, L_AnnFileInfo, L_AnnFileInfoMemory, L_AnnFileInfoOffset, L_AnnLoad, L_AnnLoadOffset, L_AnnSave, L_AnnSaveMemory, L_AnnSaveOffset, L_AnnSetOptions, L_AnnGetOptions
Topics:	Annotation Files
	Annotation Functions: Input and Output
	Implementing Annotations
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program
	Annotation Features

Example

This example loads temporary annotations from a file, saves the file in memory, then loads the memory-resident file into the globally defined container.

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName


 L_INT AnnLoadMemoryExample(HWND hWnd,
                                          HANNOBJECT hContainer)/* Container annotation object */
{
   HANNOBJECT  TmpContainer;  /* Temporary container for the annotations */
   HGLOBAL     hFileInMemory; /* Memory handle */
   L_SIZE_T    zMemSize;      /* Size of the data in memory */
   L_UCHAR*    pData;         /* Pointer to the data in memory */
   L_INT       nRet;
   HDC         hdc;
   RECT        rAnnBounds;
   RECT        rAnnBoundsName;

   /* Load the initial annotations  */
   nRet = L_AnnLoad(MAKE_IMAGE_PATH(TEXT("cannon.ann")), &TmpContainer, NULL);
   if(nRet != SUCCESS)
      return nRet;

   hFileInMemory = 0;
   /* Save the annotations as a file in memory */
   nRet = L_AnnSaveMemory(TmpContainer, ANNFMT_TIFFTAG, FALSE, &hFileInMemory, &zMemSize, NULL);
   if(nRet != SUCCESS)
      return nRet;

   TmpContainer = 0;
  
   /* Get the pointer to the memory-resident file */
   pData = (L_UCHAR*)GlobalLock (hFileInMemory);

   /* Load the new file from memory  */
   nRet = L_AnnLoadMemory(pData, zMemSize, &TmpContainer, NULL);
   if (nRet == SUCCESS)
   {
      nRet = L_AnnInsert(hContainer, TmpContainer, TRUE);
      if(nRet != SUCCESS)
         return nRet;
      hdc = GetDC(hWnd);
      nRet = L_AnnGetBoundingRect(hContainer, &rAnnBounds, &rAnnBoundsName);
      if(nRet != SUCCESS)
         return nRet;
      nRet = L_AnnDraw(hdc, &rAnnBounds, hContainer);
      if(nRet != SUCCESS)
         return nRet;
   }
   else
      return nRet;
   /* Clean up */
   GlobalUnlock (hFileInMemory);
   GlobalFree (hFileInMemory);
   return SUCCESS;
}