TIFFScanlineSize returns the size in bytes of a
row of data as it would be returned in a call to
TIFFReadScanline, or as it would be expected in a
call to TIFFWriteScanline.
TIFFRasterScanlineSize returns the size in bytes
of a complete decoded and packed raster scanline. Note that
this value may be different from the value returned by
TIFFScanlineSize if data is stored as separate
planes.
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