mpsvectordescriptor(3) [mojave man page]

MPSVectorDescriptor(3)					 MetalPerformanceShaders.framework				    MPSVectorDescriptor(3)

NAME

       MPSVectorDescriptor

SYNOPSIS

       #import <MPSMatrixTypes.h>

       Inherits NSObject.

   Class Methods
       (__nonnull instancetype) + vectorDescriptorWithLength:dataType:
       (__nonnull instancetype) + vectorDescriptorWithLength:vectors:vectorBytes:dataType:
       (size_t) + vectorBytesForLength:dataType:

   Properties
       NSUInteger length
       NSUInteger vectors
       MPSDataType dataType
       NSUInteger vectorBytes

Detailed Description
       This depends on Metal.framework

       A MPSVectorDescriptor describes the length and data type of a an array of 1-dimensional vectors. All vectors are stored as contiguous
       arrays of data.

Method Documentation
   + (size_t) vectorBytesForLength: (NSUInteger) length(MPSDataType) dataType
       Return the recommended stride, in bytes, to be used for an array of vectors of a given length.

       Parameters:
	   length The number of elements in a single vector.
	   dataType The type of vector data values.

       To achieve best performance the optimal stride between vectors within an array of vectors is not necessarily equivalent to the number of
       elements per vector. This method returns the stride, in bytes, which gives best performance for a given vector length.
	Using this stride to construct your array is recommended, but not required (provided that the stride used is still large enough to
       allocate a full vector of data).

   + (__nonnull instancetype) vectorDescriptorWithLength: (NSUInteger) length(MPSDataType) dataType
       Create a MPSVectorDescriptor with the specified length and data type.

       Parameters:
	   length The number of elements in a single vector.
	   dataType The type of the data to be stored in the vector.

       Use this function for creating a descriptor of a MPSVector object containing a single vector.

   + (__nonnull instancetype) vectorDescriptorWithLength: (NSUInteger) length(NSUInteger) vectors(NSUInteger) vectorBytes(MPSDataType) dataType
       Create a MPSVectorDescriptor with the specified length and data type.

       Parameters:
	   length The number of elements in a single vector.
	   vectors The number of vectors in the MPSVector object.
	   vectorBytes The number of bytes between starting elements of consecutive vectors.
	   dataType The type of the data to be stored in the vector.

       For performance considerations the optimal stride between vectors may not necessarily be equal to the vector length. The
       MPSVectorDescriptor class provides a method which may be used to determine this value, see the vectorBytesForLength API.

Property Documentation
   - dataType [read],  [write],  [nonatomic],  [assign]
       The type of the data which makes up the values of the vector.

   - length [read],  [write],  [nonatomic],  [assign]
       The number of elements in the vector.

   - vectorBytes [read],  [nonatomic],	[assign]
       The stride, in bytes, between corresponding elements of consecutive vectors. Must be a multiple of the element size

   - vectors [read],  [nonatomic],  [assign]
       The number of vectors.

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

Version MetalPerformanceShaders-100				  Thu Feb 8 2018					    MPSVectorDescriptor(3)