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x/ zvpixsizeu

status = xvpixsizeu(pixsize, type, unit)
status = zvpixsizeu(pixsize, type, unit);

Return the size of a pixel in bytes from a file. This routine is exactly like x/ zvpixsize except that the IHOST and RHOST values are obtained from the file specified by UNIT, which must be open. It is provided merely as a shortcut to get the pixel size of a file.