NAME

MPSImageReduceUnary

SYNOPSIS

#import <MPSImageReduce.h>

Inherits MPSUnaryImageKernel.

Inherited by MPSImageReduceColumnMax, MPSImageReduceColumnMean, MPSImageReduceColumnMin, MPSImageReduceColumnSum, MPSImageReduceRowMax, MPSImageReduceRowMean, MPSImageReduceRowMin, and MPSImageReduceRowSum.

Instance Methods

(nonnull instancetype) - initWithDevice:

Properties

MTLRegion clipRectSource

Additional Inherited Members

Detailed Description

MPSImageReduce.h MetalPerformanceShaders

Copyright:

The MPSImageReduce performs a reduction operation The reduction operations supported are:

Reduce row min
Reduce column min
Reduce row max
Reduce column max
Reduce row mean
Reduce column mean
Reduce row sum
Reduce column sum

Method Documentation

- (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 MPSUnaryImageKernel.

Reimplemented in MPSImageReduceRowMin, MPSImageReduceColumnMin, MPSImageReduceRowMax, MPSImageReduceColumnMax, MPSImageReduceRowMean, MPSImageReduceColumnMean, MPSImageReduceRowSum, and MPSImageReduceColumnSum.

Property Documentation

- clipRectSource [read], [write], [nonatomic], [assign]

The source rectangle to use when reading data. A MTLRegion that indicates which part of the source to read. If the clipRectSource does not lie completely within the source image, the intersection of the image bounds and clipRectSource will be used. The clipRectSource replaces the MPSUnaryImageKernel offset parameter for this filter. The latter is ignored. Default: MPSRectNoClip, use the entire source texture.

The clipRect specified in MPSUnaryImageKernel is used to control the origin in the destination texture where the min, max values are written. The clipRect.width must be >=2. The clipRect.height must be >= 1.

Author

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