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Commit c49b0360 authored by Lars Kiesow's avatar Lars Kiesow
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Documentation for scale filter factor

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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 ...@@ -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 other specified dimension. If both of them are -1, the input size is
used 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 See below for the list of accepted constants for use in the dimension
expression. expression.
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