L_DeleteComment - Raster Imaging C API Help

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, EXIF, JPEG, JPEG2000 or FPX files.

Some file formats can contain comments, and some cannot. Each file format has its own set of comment types. See Types of File Comments for a list of the types of comments supported by each file format.

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_SetCommentL_WriteFileComment

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.

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; 
} 

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