2009-03-29 23:20:48 +02:00
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.TH VIPS_INTERPOLATE 3 "28 March 2009"
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.SH NAME
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VipsInterpolate,
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vips_interpolate,
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vips_interpolate_get_method,
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vips_interpolate_get_window_size
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\-
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base class for VIPS interpolators
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.SH SYNOPSIS
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#include <vips/vips.h>
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typedef void (*VipsInterpolateMethod)( VipsInterpolate *,
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.br
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PEL *out, REGION *in, double x, double y );
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typedef struct _VipsInterpolateClass {
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.br
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VipsObjectClass parent_class;
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VipsInterpolateMethod interpolate;
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.br
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int (*get_window_size)( VipsInterpolate * );
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.br
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int window_size;
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.br
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} VipsInterpolateClass;
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void vips_interpolate( VipsInterpolate *interpolate,
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.br
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PEL *out, REGION *in, double x, double y );
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.br
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VipsInterpolateMethod vips_interpolate_get_method( VipsInterpolate * );
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.br
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int vips_interpolate_get_window_size( VipsInterpolate *interpolate );
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.SH DESCRIPTION
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.B VipsInterpolate
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is the base class for VIPS interpolators. It provides a simple framework that
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subclasses use to implement the various interpolators that VIPS ships with.
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You can add new interpolators by subclassing
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2009-03-30 15:34:50 +02:00
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.B VipsInterpolated
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and implementing an
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.B interpolate
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method.
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2009-03-29 23:20:48 +02:00
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You can use any interpolator in your code via the methods of
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.B VipsInterpolate.
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.B vips_interpolate(3)
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2009-03-30 15:34:50 +02:00
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looks up the interpolate method for the object and calls it for you.
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.B vips_interpolate_get_method(3)
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just does the lookup and returns a pointer to the interpolate function. You
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can use this to take the lookup out of an inner loop.
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2009-03-29 23:20:48 +02:00
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2009-03-30 15:34:50 +02:00
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.B vips_interpolate_get_window_size(3)
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either calls
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.B get_window_size()
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or if it is NULL, returns
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.B window_size.
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2009-03-29 23:20:48 +02:00
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.SH SUPPORTED INTERPOLATORS
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2009-03-30 15:34:50 +02:00
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You can list the supported interpolators with
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$ vips --list classes
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look for subclasses of
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.B VipsInterpolate.
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2009-03-29 23:20:48 +02:00
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.SH RETURN VALUE
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Unless otherwise noted, functions return 0 success and -1 on error.
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.SH SEE ALSO
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2009-03-30 15:34:50 +02:00
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VipsObject(3), VipsInterpolate(3),
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vips_type_find(3), vips(1).
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2009-03-29 23:20:48 +02:00
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.SH AUTHOR
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John Cupitt
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