IG_fltr_save_FD_size

This function is used to determine the size that is required for saving an image to a file in the specified format.

Declaration:

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AT_ERRCOUNT ACCUAPI IG_fltr_save_FD_size_calc( HIGEAR hIGear, AT_INT reserved_fd, AT_LMODE lFormatType, AT_UINT reserved_page, AT_BOOL reserved_overwrite, LPAT_UINT lpFileSize );

Arguments:

Name	Type	Description
hIGear	HIGEAR	HIGEAR handle of the image on which to calculate the size.
reserved_fd	AT_INT	Reserved for future use. Set to 0.
lFormatType	AT_LMODE	Specifies the format to use for saving, and also the compression scheme if applicable. See enumIGSaveFormats for possible values.
reserved_page	AT_UINT	Reserved for future use. Set to 0.
reserved_overwrite	AT_BOOL	Reserved for future use. Set to FALSE.
lpFileSize	LPAT_UINT	Returns the maximum possible size of the saved file.

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; HIGEAR hIGear = 0; AT_UINT nFileSize; // File size returned; nErrCount = IG_load_file("picture.tif", &hIGear); if(nErrCount == 0) { nErrCount = IG_fltr_save_FD_size_calc(hIGear, 0, IG_SAVE_TIF_UNCOMP, 1, TRUE, &nFileSize); IG_image_delete(hIGear); }

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AT_ERRCOUNT nErrCount;

HIGEAR hIGear = 0;
AT_UINT nFileSize;    // File size returned;
nErrCount = IG_load_file("picture.tif", &hIGear);
if(nErrCount == 0)
{
    nErrCount = IG_fltr_save_FD_size_calc(hIGear, 0, IG_SAVE_TIF_UNCOMP, 1, TRUE, &nFileSize);
    IG_image_delete(hIGear);
}

Remarks:

This call may be used prior to calling IG_save_FD to determine the size of result file.

As of this writing, the function can only calculate the size of a single-page file. To calculate the size of a multipage file after addition of a page, load the original file into a memory buffer, and then use IG_fltr_save_mem_size_calc.