.TH "MPSImageLanczosScale" 3 "Mon Jul 9 2018" "Version MetalPerformanceShaders-119.3" "MetalPerformanceShaders.framework" \" -*- nroff -*-
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.SH NAME
MPSImageLanczosScale
.SH SYNOPSIS
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.PP
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\fC#import <MPSImageResampling\&.h>\fP
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Inherits \fBMPSImageScale\fP\&.
.SS "Instance Methods"

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.RI "(nonnull instancetype) \- \fBinitWithDevice:\fP"
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.RI "(nullable instancetype) \- \fBinitWithCoder:device:\fP"
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.in -1c
.SS "Additional Inherited Members"
.SH "Detailed Description"
.PP 
Resize an image and / or change its aspect ratio  The \fBMPSImageLanczosScale\fP 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\&. 
.SH "Method Documentation"
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.SS "\- (nullable instancetype) \fBinitWithCoder:\fP (NSCoder *__nonnull) aDecoder(nonnull id< MTLDevice >) device"
\fBNSSecureCoding\fP 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\&. 
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\fBParameters:\fP
.RS 4
\fIaDecoder\fP The NSCoder subclass with your serialized \fBMPSKernel\fP 
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\fIdevice\fP The MTLDevice on which to make the \fBMPSKernel\fP 
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\fBReturns:\fP
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\fBA\fP new \fBMPSKernel\fP object, or nil if failure\&. 
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Reimplemented from \fBMPSImageScale\fP\&.
.SS "\- (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device"
Standard init with default properties per filter type 
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\fBParameters:\fP
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\fIdevice\fP The device that the filter will be used on\&. May not be NULL\&. 
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\fBReturns:\fP
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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\&. 
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Reimplemented from \fBMPSImageScale\fP\&.

.SH "Author"
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Generated automatically by Doxygen for MetalPerformanceShaders\&.framework from the source code\&.