Package apple.metalperformanceshaders

Class MPSImageScale

  • All Implemented Interfaces:
    NSCoding, NSCopying, NSSecureCoding, NSObject
    Direct Known Subclasses:
    MPSImageBilinearScale, MPSImageLanczosScale
    public class MPSImageScale
extends MPSUnaryImageKernel
    MPSImageScale Resize an image and / or change its aspect ratio The MPSImageScale filter can be used to resample an existing image using a different sampling frequency in each dimension. This can be used to enlarge or reduce the size of an image, or change the aspect ratio of an image. The resample methods supported are: Bilinear Bicubcic Lanczos

    • Constructor Detail

      • MPSImageScale

        protected MPSImageScale​(org.moe.natj.general.Pointer peer)

    • Method Detail

      • accessInstanceVariablesDirectly

        public static boolean accessInstanceVariablesDirectly()

      • allocWithZone

        public static java.lang.Object allocWithZone​(org.moe.natj.general.ptr.VoidPtr zone)

      • automaticallyNotifiesObserversForKey

        public static boolean automaticallyNotifiesObserversForKey​(java.lang.String key)

      • cancelPreviousPerformRequestsWithTarget

        public static void cancelPreviousPerformRequestsWithTarget​(java.lang.Object aTarget)

      • cancelPreviousPerformRequestsWithTargetSelectorObject

        public static void cancelPreviousPerformRequestsWithTargetSelectorObject​(java.lang.Object aTarget,
                                                                         org.moe.natj.objc.SEL aSelector,
                                                                         java.lang.Object anArgument)

      • classFallbacksForKeyedArchiver

        public static NSArray<java.lang.String> classFallbacksForKeyedArchiver()

      • classForKeyedUnarchiver

        public static org.moe.natj.objc.Class classForKeyedUnarchiver()

      • debugDescription_static

        public static java.lang.String debugDescription_static()

      • description_static

        public static java.lang.String description_static()

      • hash_static

        public static long hash_static()

      • initWithCoderDevice

        public MPSImageScale initWithCoderDevice​(NSCoder aDecoder,
                                         java.lang.Object 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.
        Overrides:
        initWithCoderDevice in class MPSUnaryImageKernel
        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.

      • initWithDevice

        public MPSImageScale initWithDevice​(java.lang.Object device)
        You must use one of the sub-classes of MPSImageScale
        Overrides:
        initWithDevice in class MPSUnaryImageKernel
        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.

      • instanceMethodSignatureForSelector

        public static NSMethodSignature instanceMethodSignatureForSelector​(org.moe.natj.objc.SEL aSelector)

      • instancesRespondToSelector

        public static boolean instancesRespondToSelector​(org.moe.natj.objc.SEL aSelector)

      • isSubclassOfClass

        public static boolean isSubclassOfClass​(org.moe.natj.objc.Class aClass)

      • keyPathsForValuesAffectingValueForKey

        public static NSSet<java.lang.String> keyPathsForValuesAffectingValueForKey​(java.lang.String key)

      • new_objc

        public static java.lang.Object new_objc()

      • resolveClassMethod

        public static boolean resolveClassMethod​(org.moe.natj.objc.SEL sel)

      • resolveInstanceMethod

        public static boolean resolveInstanceMethod​(org.moe.natj.objc.SEL sel)

      • scaleTransform

        public MPSScaleTransform scaleTransform()
        [@property] scaleTransform An optional transform that describes how to scale and translate the source image If the scaleTransform is NULL, then any image scaling factor such as MPSImageLanczosScale will rescale the image so that the source image fits exactly into the destination texture. If the transform is not NULL, then the transform is used for determining how to map the source image to the destination. Default: NULL When the scaleTransform is set to non-NULL, the values pointed to by the new scaleTransform are copied to object storage, and the pointer is updated to point to internal storage. Do not attempt to free it. You may free your copy of the MPSScaleTransform as soon as the property set operation is complete. When calculating a scaleTransform, use the limits of the bounding box for the intended source region of interest and the destination clipRect. Adjustments for pixel center coordinates are handled internally to the function. For example, the scale transform to convert the entire source image to the entire destination image size (clipRect = MPSRectNoClip) would be: [@code] scaleTransform.scaleX = (double) dest.width / source.width; scaleTransform.scaleY = (double) dest.height / source.height; scaleTransform.translateX = scaleTransform.translateY = 0.0; [@endcode] The translation parameters allow you to adjust the region of the source image used to create the destination image. They are in destination coordinates. To place the top left corner of the destination clipRect to represent the position {x,y} in source coordinates, we solve for the translation based on the standard scale matrix operation for each axis: [@code] dest_position = source_position * scale + translation; translation = dest_position - source_position * scale; [@endcode] For the top left corner of the clipRect, the dest_position is considered to be {0,0}. This gives us a translation of: [@code] scaleTransform.translateX = -source_origin.x * scaleTransform.scaleX; scaleTransform.translateY = -source_origin.y * scaleTransform.scaleY; [@endcode] One would typically use non-zero translations to do tiling, or provide a resized view into a internal segment of an image. NOTE: Changing the Lanczos scale factor may trigger recalculation of signficant state internal to the object when the filter is encoded to the command buffer. The scale factor is scaleTransform->scaleX,Y, or the ratio of source and destination image sizes if scaleTransform is NULL. Reuse a MPSImageLanczosScale object for frequently used scalings to avoid redundantly recreating expensive resampling state.

      • setScaleTransform

        public void setScaleTransform​(MPSScaleTransform value)
        [@property] scaleTransform An optional transform that describes how to scale and translate the source image If the scaleTransform is NULL, then any image scaling factor such as MPSImageLanczosScale will rescale the image so that the source image fits exactly into the destination texture. If the transform is not NULL, then the transform is used for determining how to map the source image to the destination. Default: NULL When the scaleTransform is set to non-NULL, the values pointed to by the new scaleTransform are copied to object storage, and the pointer is updated to point to internal storage. Do not attempt to free it. You may free your copy of the MPSScaleTransform as soon as the property set operation is complete. When calculating a scaleTransform, use the limits of the bounding box for the intended source region of interest and the destination clipRect. Adjustments for pixel center coordinates are handled internally to the function. For example, the scale transform to convert the entire source image to the entire destination image size (clipRect = MPSRectNoClip) would be: [@code] scaleTransform.scaleX = (double) dest.width / source.width; scaleTransform.scaleY = (double) dest.height / source.height; scaleTransform.translateX = scaleTransform.translateY = 0.0; [@endcode] The translation parameters allow you to adjust the region of the source image used to create the destination image. They are in destination coordinates. To place the top left corner of the destination clipRect to represent the position {x,y} in source coordinates, we solve for the translation based on the standard scale matrix operation for each axis: [@code] dest_position = source_position * scale + translation; translation = dest_position - source_position * scale; [@endcode] For the top left corner of the clipRect, the dest_position is considered to be {0,0}. This gives us a translation of: [@code] scaleTransform.translateX = -source_origin.x * scaleTransform.scaleX; scaleTransform.translateY = -source_origin.y * scaleTransform.scaleY; [@endcode] One would typically use non-zero translations to do tiling, or provide a resized view into a internal segment of an image. NOTE: Changing the Lanczos scale factor may trigger recalculation of signficant state internal to the object when the filter is encoded to the command buffer. The scale factor is scaleTransform->scaleX,Y, or the ratio of source and destination image sizes if scaleTransform is NULL. Reuse a MPSImageLanczosScale object for frequently used scalings to avoid redundantly recreating expensive resampling state.

      • setVersion_static

        public static void setVersion_static​(long aVersion)

      • superclass_static

        public static org.moe.natj.objc.Class superclass_static()

      • supportsSecureCoding

        public static boolean supportsSecureCoding()

      • _supportsSecureCoding

        public boolean _supportsSecureCoding()
        Description copied from interface: NSSecureCoding
        This property must return YES on all classes that allow secure coding. Subclasses of classes that adopt NSSecureCoding and override initWithCoder: must also override this method and return YES. The Secure Coding Guide should be consulted when writing methods that decode data.
        Specified by:
        _supportsSecureCoding in interface NSSecureCoding
        Overrides:
        _supportsSecureCoding in class MPSUnaryImageKernel

      • version_static

        public static long version_static()