12-08-2016
BASH doesn't actually have two-dimensional arrays.
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LEARN ABOUT MOJAVE
mpsvectordescriptor
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)