goog.provide('ol.raster.Operation');
goog.provide('ol.raster.OperationType');
/**
* Raster operation type. Supported values are `'pixel'` and `'image'`.
* @enum {string}
* @api
*/
ol.raster.OperationType = {
PIXEL: 'pixel',
IMAGE: 'image'
};
/**
* A function that takes an array of input data, performs some operation, and
* returns an array of ouput data. For `'pixel'` type operations, functions
* will be called with an array of {@link ol.raster.Pixel} data and should
* return an array of the same. For `'image'` type operations, functions will
* be called with an array of {@link ImageData
* https://developer.mozilla.org/en-US/docs/Web/API/ImageData} and should return
* an array of the same. 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".
*
* @typedef {function((Array.<ol.raster.Pixel>|Array.<ImageData>), Object):
* (Array.<ol.raster.Pixel>|Array.<ImageData>)}
* @api
*/
ol.raster.Operation;
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