MPSImageLanczosScale(3)

NAME

       MPSImageLanczosScale

SYNOPSIS

       #import <MPSImageResampling.h>

       Inherits MPSImageScale.

   Instance Methods
       (nonnull instancetype) - initWithDevice:
       (nullable instancetype) - initWithCoder:device:

   Additional Inherited Members

Detailed Description

       Resize an image and / or change its aspect ratio  The
       MPSImageLanczosScale filter can be used to resample an existing image
       using a different sampling frequency in each dimension. This can be
       used to enlarge or reduce the size of an image, or change the aspect
       ratio of an image. The filter uses a Lanczos resampling algorithm which
       typically produces better quality for photographs, but is slower than
       linear sampling using the GPU texture units. Lanczos downsampling does
       not require a low pass filter to be applied before it is used. Because
       the resampling function has negative lobes, Lanczos can result in
       ringing near sharp edges, making it less suitable for vector art.

Method Documentation

   - (nullable instancetype) initWithCoder: (NSCoder *__nonnull)
       aDecoder(nonnull id< MTLDevice >) device
       NSSecureCoding compatability  While the standard
       NSSecureCoding/NSCoding method -initWithCoder: should work, since the
       file can't know which device your data is allocated on, we have to
       guess and may guess incorrectly. To avoid that problem, use
       initWithCoder:device instead.

       Parameters:
           aDecoder The NSCoder subclass with your serialized MPSKernel
           device The MTLDevice on which to make the MPSKernel

       Returns:
           A new MPSKernel object, or nil if failure.



       Reimplemented from MPSImageScale.

   - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device
       Standard init with default properties per filter type

       Parameters:
           device The device that the filter will be used on. May not be NULL.

       Returns:
           a pointer to the newly initialized object. This will fail,
           returning nil if the device is not supported. Devices must be
           MTLFeatureSet_iOS_GPUFamily2_v1 or later.



       Reimplemented from MPSImageScale.

Author

       Generated automatically by Doxygen for
       MetalPerformanceShaders.framework from the source code.





Version MetalPerformanceShaders-Thu2Jul 13 2017        MPSImageLanczosScale(3)


Mac OS X 10.13.1 - Generated Tue Nov  7 07:46:38 CST 2017