This function is used to determine the size that is required for saving an image to a file in the specified format.
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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 ); |
Name | Type | Description |
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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. |
All pixel formats supported by ImageGear for C and C++.
None
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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); } |
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.
See also the section Saving.