IG_fltr_pageinfo_get

This function obtains information about the page specified by the nPage parameter from a named multi-page file without actually loading it.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_fltr_pageinfo_get_ex( const LPSTR lpszFileName, UINT nPage, LPAT_MODE lpFileType, LPAT_MODE lpCompression, HIGDIBINFO* lphDIB );

Arguments:

Name	Type	Description
lpszFileName	const LPSTR	Path and name of the file to get the information about. The path can be absolute or relative.
nPage	UINT	Number of the page in a multi-page file for which to get information.
lpFileType	LPAT_MODE	Pointer to an AT_MODE variable in which the file type will be returned. See enumIGFormats for possible values.
lpCompression	LPAT_MODE	Pointer to an AT_MODE variable in which compression type will be returned. See enumIGCompressions for possible values.
lphDIB	HIGDIBINFO*	Pointer to HIGDIBINFO object to which other file information, such as width, height, Bits Per Pixel etc. will be returned.

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++.

Example:

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AT_ERRCOUNT nErrCount; AT_MODE fileType; AT_MODE compression; HIGDIBINFO hDIB; nErrCount = IG_fltr_pageinfo_get_ex("picture.tif", 1, &fileType, &compression, &hDIB); if(nErrCount == 0) { // ... // Delete DIB info IG_DIB_info_delete(hDIB); }

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AT_ERRCOUNT nErrCount;
AT_MODE fileType;
AT_MODE compression;
HIGDIBINFO hDIB;

nErrCount = IG_fltr_pageinfo_get_ex("picture.tif", 1,
    &fileType, &compression, &hDIB);
if(nErrCount == 0)
{
    // ...
    // Delete DIB info
    IG_DIB_info_delete(hDIB);
}

Remarks:

Any of the output parameters such as lpFileType, lpCompression or lphDIB can be NULL, if the corresponding info is not required.

See also the section Loading and Saving.

This function is identical to IG_info_get_ex.