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_detect_file

This function detects the format of the image file specified by a filename.


AT_ERRCOUNT ACCUAPI IG_fltr_detect_file(
    const LPSTR lpszFileName,
    LPAT_MODE lpFileType


Name Type Description
lpszFileName const LPSTR File name of the image which format you wish to detect.
lpFileType LPAT_MODE Pointer to an AT_MODE variable in which the file type will be returned. See enumIGFormats for possible values. If the file format can not be detected, this parameter will return IG_FORMAT_UNKNOWN.

Return Value:

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

Supported Raster Image Formats:

This function does not process image pixels.


AT_ERRCOUNT nErrCount; // will hold returned error count
AT_MODE nFormatID;

nErrCount = IG_fltr_detect_file("picture.tif", &nFormatID);
if(nFormatID == IG_FORMAT_TIF)
    // ...


See also the section Detecting Image File Format.

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