mpsimageconversion(3) [mojave man page]
MPSImageConversion(3) MetalPerformanceShaders.framework MPSImageConversion(3) NAME
MPSImageConversion SYNOPSIS
#import <MPSImageConversion.h> Inherits MPSUnaryImageKernel. Instance Methods (nonnull instancetype) - initWithDevice:srcAlpha:destAlpha:backgroundColor:conversionInfo: Properties MPSAlphaType sourceAlpha MPSAlphaType destinationAlpha Additional Inherited Members Detailed Description MPSImageConversions.h MetalPerformanceShaders.framework Copyright: Copyright (c) 2015 Apple Inc. All rights reserved. MetalPerformanceShaders conversion filters MPS_CLASS_AVAILABLE_STARTING The MPSImageConversion filter performs a conversion from source to destination Method Documentation - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device(MPSAlphaType) srcAlpha(MPSAlphaType) destAlpha(nullable CGFloat *) backgroundColor(nullable CGColorConversionInfoRef) conversionInfo Create a converter that can convert texture colorspace, alpha and texture format Create a converter that can convert texture colorspace, alpha and MTLPixelFormat. Optimized cases exist for NULL color space converter and no alpha conversion. Parameters: device The device the filter will run on srcAlpha The alpha encoding for the source texture destAlpha The alpha encoding for the destination texture backgroundColor An array of CGFloats giving the background color to use when flattening an image. The color is in the source colorspace. The length of the array is the number of color channels in the src colorspace. If NULL, use {0}. conversionInfo The colorspace conversion to use. May be NULL, indicating no color space conversions need to be done. Returns: An initialized MPSImageConversion object. Property Documentation - destinationAlpha [read], [nonatomic], [assign] Premultiplication description for the destinationAlpha texture Colorspace conversion operations produce non-premultiplied data. Use this property to tag cases where premultiplied results are required. If MPSPixelAlpha_AlphaIsOne is used, the alpha channel will be set to 1. Default: MPSPixelAlpha_AlphaIsOne - sourceAlpha [read], [nonatomic], [assign] Premultiplication description for the source texture Most colorspace conversion operations can not work directly on premultiplied data. Use this property to tag premultiplied data so that the source texture can be unpremultiplied prior to application of these transforms. Default: MPSPixelAlpha_AlphaIsOne Author Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code. Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageConversion(3)
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MPSImageMedian(3) MetalPerformanceShaders.framework MPSImageMedian(3) NAME
MPSImageMedian SYNOPSIS
#import <MPSImageMedian.h> Inherits MPSUnaryImageKernel. Instance Methods (nonnull instancetype) - initWithDevice:kernelDiameter: (nullable instancetype) - initWithCoder:device: (nonnull instancetype) - initWithDevice: Class Methods (NSUInteger) + maxKernelDiameter (NSUInteger) + minKernelDiameter Properties NSUInteger kernelDiameter Additional Inherited Members Detailed Description MPSImageMedian.h MetalPerformanceShaders.framework Copyright: Copyright (c) 2015 Apple Inc. All rights reserved. MetalPerformanceShaders median filters The MPSImageMedian applies a median filter to an image. A median filter finds the median color value for each channel within a kernelDiameter x kernelDiameter window surrounding the pixel of interest. It is a common means of noise reduction and also as a smoothing filter with edge preserving qualities. NOTE: The MPSImageMedian filter currently only supports images with <= 8 bits/channel. 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 MPSUnaryImageKernel. - (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. - (nonnull instancetype) initWithDevice: (nonnull id< MTLDevice >) device(NSUInteger) kernelDiameter Initialize a filter for a particular kernel size and device Parameters: device The device the filter will run on kernelDiameter Diameter of the median filter. Must be an odd number. Returns: A valid object or nil, if failure. + (NSUInteger) maxKernelDiameter The maximum diameter in pixels of the filter window supported by the median filter. + (NSUInteger) minKernelDiameter The minimum diameter in pixels of the filter window supported by the median filter. Property Documentation - kernelDiameter [read], [nonatomic], [assign] The diameter in pixels of the filter window. The median filter is applied to a kernelDiameter x kernelDiameter window of pixels centered on the corresponding source pixel for each destination pixel. The kernel diameter must be an odd number. Author Generated automatically by Doxygen for MetalPerformanceShaders.framework from the source code. Version MetalPerformanceShaders-100 Thu Feb 8 2018 MPSImageMedian(3)