L_DeleteComment

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L_DeleteComment

#include "l_bitmap.h"

L_LTFIL_API L_INT L_DeleteComment(pszFile, uType, uFlags, pSaveOptions)

L_TCHAR* pszFile;	/* character string containing the input file name */
L_UINT uType;	/* type of comment */
L_UINT uFlags;	/* flags */
pSAVEFILEOPTION pSaveOptions;	/* pointer to optional extended save options */

Deletes a comment field from a file.

Parameter	Description
pszFile	Character string containing the input file name.
uType	The type of comment. Refer to Types of File Comments.
uFlags	Reserved for future use. Pass 0.
pSaveOptions	Pointer to optional extended save options. Pass NULL to use the default save options.

Returns

SUCCESS	The comment was deleted.
< 0	An error occurred. Refer to Return Codes.

Comments

This function only applies to the TIF or EXIF file formats.

Some file formats can contain comments, and some cannot.Each file format has its own set of comment types. When you save a file, the comments, which LEADTOOLS maintains in a global array, are saved in the file. The index into the array (specified using a constant) determines the type of comment, as described in Types of File Comments.

Note:

More options are available in the SAVEFILEOPTION structure.

Required DLLs and Libraries

LTFIL
File format DLLs

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_FileInfo, L_FileInfoMemory, L_GetComment, L_SetComment
Topics:	Raster Image Functions: Input and Output
	Loading and Saving Images
	For a list of functions that utilize the LOADFILEOPTION or SAVEFILEOPTION structures, refer to Functions Utilizing the LOADFILEOPTION or SAVEFILEOPTION structures.

Example

Delete Comments from a file.

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


 L_INT DeleteCommentExample(L_VOID)
{
   L_INT nRet;
   L_TCHAR szImageFileName[L_MAXPATH];
   lstrcpy(szImageFileName, MAKE_IMAGE_PATH(TEXT("Test.jpg")));

   nRet = L_ReadFileComment(szImageFileName, CMNT_IPTC_BYLINE, NULL, 0, NULL);
   if(nRet <= 0)
      return nRet;

   nRet = L_DeleteComment(szImageFileName, CMNT_IPTC_BYLINE, 0, NULL);
   if(nRet != SUCCESS)
      return nRet;

   nRet = L_ReadFileComment(szImageFileName, CMNT_IPTC_BYLINE, NULL, 0, NULL);
   if(nRet > 0)
   {
      OutputDebugString(TEXT("Error: Comment is still there!\n"));
      return nRet;
   }

   return SUCCESS;
}