Class MutableRuntimeReferenceImageLibrary

A reference image library that can be constructed and modified at runtime.

Inheritance

object

RuntimeReferenceImageLibrary

MutableRuntimeReferenceImageLibrary

Implements

IReferenceImageLibrary

Inherited Members

RuntimeReferenceImageLibrary.this[int]

RuntimeReferenceImageLibrary.count

RuntimeReferenceImageLibrary.GetReferenceImageAt(int)

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: UnityEngine.XR.ARSubsystems

Assembly: Unity.XR.ARSubsystems.dll

Syntax

public abstract class MutableRuntimeReferenceImageLibrary : RuntimeReferenceImageLibrary, IReferenceImageLibrary

Remarks

This differs from an XRReferenceImageLibrary, which can only be constructed in the Editor and is immutable at runtime.

Important

Implementors: XRImageTrackingSubsystem providers must implement this class for their provider if supportsMutableLibrary is true to provide the functionality to support runtime mutable libraries.

This is not something consumers of the UnityEngine.XR.ARSubsystems namespace should implement.

Properties

supportedTextureFormatCount

The number of texture formats that are supported for image addition.

Declaration

public abstract int supportedTextureFormatCount { get; }

Property Value

Type	Description
int

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

supportsValidation

(Read Only) True if this MutableRuntimeReferenceImageLibrary supports the validation of images when added via ScheduleAddImageWithValidationJob(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle).

Declaration

public virtual bool supportsValidation { get; }

Property Value

Type	Description
bool

Remarks

Important

Implementors: If this is true, then your implementation must also override:

• ScheduleAddImageWithValidationJobImpl(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle)
• GetAddReferenceImageJobStatus(AddReferenceImageJobState)

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

Methods

CreateAddJobState(IntPtr, JobHandle)

Derived classes should call this to create an AddReferenceImageJobState to be returned by its implementation of ScheduleAddImageWithValidationJobImpl(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle).

Declaration

protected AddReferenceImageJobState CreateAddJobState(IntPtr handle, JobHandle jobHandle)

Parameters

Type	Name	Description
IntPtr	handle	A handle to the job state. This should be unique to this job state.
JobHandle	jobHandle	The JobHandle associated with the add job state.

Returns

Type	Description
AddReferenceImageJobState	Returns a new AddReferenceImageJobState that contains information about the state of an add image job.

Exceptions

Type	Condition
ArgumentException	Thrown if supportsValidation is true and handle is IntPtr.Zero.

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

GetAddReferenceImageJobStatus(AddReferenceImageJobState)

Get the status of an AddReferenceImageJobState.

Declaration

protected virtual AddReferenceImageJobStatus GetAddReferenceImageJobStatus(AddReferenceImageJobState state)

Parameters

Type	Name	Description
AddReferenceImageJobState	state	The state whose status should be retrieved.

Returns

Type	Description
AddReferenceImageJobStatus	Returns the AddReferenceImageJobStatus of an existing AddReferenceImageJobState.

Remarks

Important

Implementors: If supportsValidation is true, then you must also implement this method.

Exceptions

Type	Condition
NotImplementedException	Thrown if the state has a non-zero IntPtr (non-zero means the concrete class should have overriden this method).

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

GetEnumerator()

Gets an enumerator for this collection of reference images. This allows this image library to act as a collection in a foreach statement. The MutableRuntimeReferenceImageLibrary.Enumerator is a struct, so no garbage is generated.

Declaration

public MutableRuntimeReferenceImageLibrary.Enumerator GetEnumerator()

Returns

Type	Description
MutableRuntimeReferenceImageLibrary.Enumerator	An enumerator that can be used in a foreach statement.

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

GetSupportedTextureFormatAt(int)

Returns the supported texture format at index. Useful for enumerating the supported texture formats for image addition.

Declaration

public TextureFormat GetSupportedTextureFormatAt(int index)

Parameters

Type	Name	Description
int	index	The index of the format to retrieve.

Returns

Type	Description
TextureFormat	The supported format at index.

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

GetSupportedTextureFormatAtImpl(int)

Derived methods should return the TextureFormat at the given index. index has already been validated to be within [0..supportedTextureFormatCount].

Declaration

protected abstract TextureFormat GetSupportedTextureFormatAtImpl(int index)

Parameters

Type	Name	Description
int	index	The index of the format to retrieve.

Returns

Type	Description
TextureFormat	The supported format at index.

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

IsTextureFormatSupported(TextureFormat)

Determines whether the given format is supported.

Declaration

public bool IsTextureFormatSupported(TextureFormat format)

Parameters

Type	Name	Description
TextureFormat	format	The TextureFormat to test.

Returns

Type	Description
bool	true if format is supported for image addition; otherwise, false.

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

ScheduleAddImageJobImpl(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle)

This method should schedule a Unity Job which adds an image to this reference image library.

Declaration

protected abstract JobHandle ScheduleAddImageJobImpl(NativeSlice<byte> imageBytes, Vector2Int sizeInPixels, TextureFormat format, XRReferenceImage referenceImage, JobHandle inputDeps)

Parameters

Type	Name	Description
NativeSlice<byte>	imageBytes	The raw image bytes in format. Assume the bytes will be valid until the job completes.
Vector2Int	sizeInPixels	The width and height of the image, in pixels.
TextureFormat	format	The format of imageBytes. The format has already been validated with IsTextureFormatSupported(TextureFormat).
XRReferenceImage	referenceImage	The XRReferenceImage data associated with the image to add to the library. This includes information like physical dimensions, associated Texture2D (optional), and string name.
JobHandle	inputDeps	Input dependencies for the add image job.

Returns

Type	Description
JobHandle	A JobHandle which can be used to chain together multiple tasks or to query for completion.

See Also

ScheduleAddImageWithValidationJobImpl(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle)

ScheduleAddImageWithValidationJob(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle)

Asynchronously adds an image to this library.

Declaration

public AddReferenceImageJobState ScheduleAddImageWithValidationJob(NativeSlice<byte> imageBytes, Vector2Int sizeInPixels, TextureFormat format, XRReferenceImage referenceImage, JobHandle inputDeps = default)

Parameters

Type	Name	Description
NativeSlice<byte>	imageBytes	The raw image bytes in format.
Vector2Int	sizeInPixels	The width and height of the image, in pixels.
TextureFormat	format	The format of imageBytes. Test for and enumerate supported formats with supportedTextureFormatCount, GetSupportedTextureFormatAt(int), and IsTextureFormatSupported(TextureFormat).
XRReferenceImage	referenceImage	The XRReferenceImage data associated with the image to add to the library. This includes information like physical dimensions, associated Texture2D (optional), and string name. The guid must be set to zero (Empty). A new guid is automatically generated for the new image.
JobHandle	inputDeps	(Optional) Input dependencies for the add image job.

Returns

Type	Description
AddReferenceImageJobState	Returns an AddReferenceImageJobState that can be used to query the status of the job. The AddReferenceImageJobState can be used to determine whether the image was successfully added. Invalid images will be not be added to the reference image library.

Remarks

Image addition can take some time (for example, several frames) due to the processing that must occur to insert the image into the library. This is done using the [Unity Job System] (https://docs.unity3d.com/Manual/JobSystem.html). The returned AddReferenceImageJobState allows your to query for the status of the job, and, if the job completed, whether it was successful. The job state includes the JobHandle which can be used to chain together multiple tasks.

This job, like all Unity jobs, can have dependencies (using the inputDeps). This can be useful, for example, if imageBytes is the output of another job. If you are adding multiple images to the library, it is not necessary to pass a previous ScheduleAddImageWithValidationJob(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle)'s JobHandle as the input dependency to the next ScheduleAddImageWithValidationJob(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle).

The imageBytes must be valid until this job completes. The caller is responsible for managing its memory. You can use the resulting JobHandle to schedule a job that deallocates the imageBytes.

Exceptions

Type	Condition
ArgumentException	Thrown if imageBytes does not contain any bytes.
ArgumentException	Thrown if referenceImage's guid is not Empty.
ArgumentNullException	Thrown if referenceImage's name is null.
ArgumentOutOfRangeException	Thrown if referenceImage's specifySize is true but referenceImage.size contains values less than or equal to zero.
InvalidOperationException	Thrown if the format is not supported. You can query for support using IsTextureFormatSupported(TextureFormat).
ArgumentOutOfRangeException	Thrown if sizeInPixels contains values less than or equal to zero.

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

ScheduleAddImageWithValidationJobImpl(NativeSlice<byte>, Vector2Int, TextureFormat, XRReferenceImage, JobHandle)

This method should schedule a Unity Job which adds an image to this reference image library.

Declaration

protected virtual AddReferenceImageJobState ScheduleAddImageWithValidationJobImpl(NativeSlice<byte> imageBytes, Vector2Int sizeInPixels, TextureFormat format, XRReferenceImage referenceImage, JobHandle inputDeps)

Parameters

Type	Name	Description
NativeSlice<byte>	imageBytes	The raw image bytes in format. You can assume the bytes are valid until the job completes.
Vector2Int	sizeInPixels	The width and height of the image, in pixels.
TextureFormat	format	The format of imageBytes. The format has already been validated with IsTextureFormatSupported(TextureFormat).
XRReferenceImage	referenceImage	The XRReferenceImage data associated with the image to add to the library. This includes information like physical dimensions, associated Texture2D (optional), and string name.
JobHandle	inputDeps	A JobHandle that represents input dependencies for the add image job.

Returns

Type	Description
AddReferenceImageJobState	Returns an AddReferenceImageJobState which contains the state of the asynchronous image addition.

Exceptions

Type	Condition
NotImplementedException	Thrown by this base class implementation. If supportsValidation is true, then this method should be implemented by the derived class.

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)

Implements

IReferenceImageLibrary

See Also

CreateRuntimeLibrary(XRReferenceImageLibrary)