Module: ol/source/Raster

Classes

RasterSourceEvent

RasterSource

Type Definitions

FauxMessageEvent{Object}

Properties:

Name	Type	Description
data	Object	Message data.

Job{Object}

Properties:

Name	Type	Description
meta	Object	Job metadata.
inputs	Array.<ImageData>	Array of input data.
callback	JobCallback	Called when the job is complete.

JobCallback()

source/Raster.js, line 190

MinionData{Object}

Properties:

Name	Type	Description
buffers	Array.<ArrayBuffer>	Array of buffers.
meta	Object	Operation metadata.
imageOps	boolean	The operation is an image operation.
width	number	The width of the image.
height	number	The height of the image.

Operation()

source/Raster.js, line 410

A function that takes an array of input data, performs some operation, and returns an array of output data. For pixel type operations, the function will be called with an array of pixels, where each pixel is an array of four numbers ([r, g, b, a]) in the range of 0 - 255. It should return a single pixel array. For 'image' type operations, functions will be called with an array of ImageData and should return a single ImageData. The operations are called with a second "data" argument, which can be used for storage. The data object is accessible from raster events, where it can be initialized in "beforeoperations" and accessed again in "afteroperations".

Options{Object}

Properties:

Name	Type	Argument	Default	Description
sources	Array.<(module:ol/source/Source~Source|module:ol/layer/Layer~Layer)>			Input sources or layers. For vector data, use an VectorImage layer.
operation	Operation	<optional>		Raster operation. The operation will be called with data from input sources and the output will be assigned to the raster source.
lib	Object	<optional>		Functions that will be made available to operations run in a worker.
threads	number	<optional>		By default, operations will be run in a single worker thread. To avoid using workers altogether, set threads: 0. For pixel operations, operations can be run in multiple worker threads. Note that there is additional overhead in transferring data to multiple workers, and that depending on the user's system, it may not be possible to parallelize the work.
operationType	RasterOperationType	<optional>	'pixel'	Operation type. Supported values are 'pixel' and 'image'. By default, 'pixel' operations are assumed, and operations will be called with an array of pixels from input sources. If set to 'image', operations will be called with an array of ImageData objects from input sources.
resolutions	Array.<number> | null	<optional>		Resolutions. If specified, raster operations will only be run at the given resolutions. By default, the resolutions of the first source with resolutions specified will be used, if any. Set to null to use any view resolution instead.

ProcessorOptions{Object}

Properties:

Name	Type	Argument	Default	Description
threads	number			Number of workers to spawn.
operation	Operation			The operation.
lib	Object.<string, function()>	<optional>		Functions that will be made available to operations run in a worker.
queue	number			The number of queued jobs to allow.
imageOps	boolean	<optional>	false	Pass all the image data to the operation instead of a single pixel.

RasterOperationType{'pixel'} {'image'}

Raster operation type. Supported values are 'pixel' and 'image'.

RasterSourceEventTypes{ImageSourceEventTypes} {'beforeoperations'} {'afteroperations'}