LFileSettings::GetIgnoreFilters

#include "ltwrappr.h"

static L_SSIZE_T LFileSettings::GetIgnoreFilters(pszFilters, uSize)

L_TCHAR * pszFilters;	character string to be updated with filters
L_SIZE_T uSize;	size in bytes of pszFilters

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

Parameter	Description
pszFilters	Pointer to a character string to be updated with the current ignored filters list.
uSize	The size in bytes of the buffer pointed to by pszFilters.

Returns

>=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:

1.	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.
2.	Allocate a buffer of size (Returned Value * sizeof(L_TCHAR)).
3.	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

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

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C++ Class Library Help

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Summary of Features

Functions:	LFileSettings::IgnoreFilters, LFileSettings::PreLoadFilters, LFileSettings::GetPreLoadFilters, Class Members.
Topics:	Raster Image Functions: Input/Output File Filters
	Loading File Filters