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

MPSConversions.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

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