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Documentation for scale filter factor

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Lars Kiesow 2014-01-25 15:34:23 +01:00
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doc/filters.texi
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@ -6911,6 +6911,11 @@ maintains the aspect ratio of the input image, calculated from the
other specified dimension. If both of them are -1, the input size is
used
If one of the values is -n with n > 1, the scale filter will also use a value
that maintains the aspect ratio of the input image, calculated from the other
specified dimension. After that it will, however, make sure that the calculated
dimension is divisible by n and adjust the value if necessary.
See below for the list of accepted constants for use in the dimension
expression.