In This Topic ▼

LFileSettings::GetIgnoreFilters

Summary

Retrieves the current ignored filters list that LEADTOOLS should NEVER load, even if present.

Syntax

#include "ltwrappr.h"

static L_SSIZE_T LFileSettings::GetIgnoreFilters(pszFilters, uSize)

Parameters

L_TCHAR * pszFilters

Pointer to a character string to be updated with the current ignored filters list.

L_SIZE_T uSize

The size in bytes of the buffer pointed to by pszFilters.

Returns

Value	Meaning
>=0	The size in bytes of the ignored filters list.
< 0	An error occurred. Refer to Return Codes.

Comments

In case the current ignored filters list should be changed, call this function before calling the LFileSettings::IgnoreFilters function.

To retrieve the ignored filters list, the user should do the following:

Call the LFileSettings::GetIgnoreFilters function passing pszFilters as NULL and uSize as 0 to retrieve the size required for the filters list as returned value.
Allocate a buffer of size returned value.
Call the LFileSettings::GetIgnoreFilters function passing the allocated buffer to the pszFilters and the returned value to uSize to retrieve the filters list.

Required DLLs and Libraries

LTFIL
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.

Example

L_INT LFileSettings__GetIgnoreFiltersExample() 
{ 
   L_TCHAR * pszList = NULL; 
   L_SIZE_T nRet; 
   LFileSettings FileSettings; 
   LBitmap Bitmap; 
 
   /* get the original filters list */ 
   nRet = LFileSettings::GetIgnoreFilters(NULL, 0); 
   pszList = (L_TCHAR *)malloc(nRet*sizeof(L_TCHAR)); 
   nRet = LFileSettings::GetIgnoreFilters(pszList, nRet); 
   ::MessageBox(NULL, pszList, TEXT("TEST"), MB_OK); 
   free(pszList); 
 
   /* ignore TGA filter */ 
   LFileSettings::IgnoreFilters(TEXT("TGA")); 
 
   /* get the new filters list */ 
   nRet = LFileSettings::GetIgnoreFilters(NULL, 0); 
   pszList = (L_TCHAR *)malloc(nRet*sizeof(L_TCHAR)); 
   nRet = LFileSettings::GetIgnoreFilters(pszList, nRet); 
   ::MessageBox(NULL, pszList, TEXT("TEST"), MB_OK); 
   free(pszList); 
 
   /* try to load TGA, should fail: ERROR_FILE_FORMAT */ 
   nRet = Bitmap.Load(MAKE_IMAGE_PATH(TEXT("test.tga"))); 
   if(nRet == ERROR_FILE_FORMAT) 
      ::MessageBox(NULL, TEXT("TGA ignored"), TEXT("TEST"), MB_OK); 
 
   return SUCCESS; 
}