ImageGear for C and C++ on Linux v20.0 - Updated
API Reference Guide > Core Component API Reference > Core Component Functions Reference > Filter Functions > IG_fltr_load_file_format

This function loads an image from the specified file into memory and creates a HIGEAR handle for this image. The function allows to skip the automatic detection of the file format and instead use the specified format ID.


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AT_ERRCOUNT ACCUAPI IG_fltr_load_file_format(
   AT_MODE nFormat,
   const LPSTR lpszFileName,
   UINT nPage,
   LPHIGEAR lphIGear


Name Type Description
nFormat AT_MODE A constant indicating the file format of the input file. See enumIGFormats for possible values. Set to IG_FORMAT_UNKNOWN to let ImageGear detect the file format.
lpszFileName const LPSTR Path and name of the file to load. The path can be absolute or relative.
nPage UINT Page number to load if this is a multi-page file. Note that page numbers begin at 1, not 0. Set nPage to 1 if this is not a multi-page file.
lphIGear LPHIGEAR Pointer to the HIGEAR object in which to return the ImageGear handle of the image.

Return Value:

Returns 0 if successful. Otherwise, returns the number of ImageGear errors that occurred during this function call.

Supported Raster Image Formats:

All pixel formats supported by ImageGear for C and C++.


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HIGEAR    hIGear;        // Will hold handle returned by IG_fltr_load_file
AT_ERRCOUNT nErrCount;    // Count of errs on stack upon ret from func*/
// Load the selected image
nErrCount = IG_fltr_load_file_format(IG_FORMAT_TIF, "picture.tif", 1, &hIGear);
if(nErrCount == 0)
    // ...

    // Delete the image


If nFormat = IG_FORMAT_UNKNOWN then ImageGear attempts to detect the file format automatically, and then loads the image. Otherwise, ImageGear skips the file format detection and loads the file with the specified format filter.

See also the section Loading and Saving.

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