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53 lines
2.0 KiB
Plaintext
53 lines
2.0 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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interface nsIURI;
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[function, scriptable, uuid(e4089e21-71b6-40af-b546-33c21b90e874)]
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interface mozIRepresentativeColorCallback : nsISupports
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{
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/**
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* Will be called when color analysis finishes.
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*
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* @param success
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* True if analysis was successful, false otherwise.
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* Analysis can fail if the image is transparent, imageURI doesn't
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* resolve to a valid image, or the image is too big.
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*
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* @param color
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* The representative color as an integer in RGB form.
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* e.g. 0xFF0102 == rgb(255,1,2)
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* If success is false, color is not provided.
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*/
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void onComplete(in boolean success, [optional] in unsigned long color);
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};
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[scriptable, uuid(d056186c-28a0-494e-aacc-9e433772b143)]
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interface mozIColorAnalyzer : nsISupports
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{
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/**
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* Given an image URI, find the most representative color for that image
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* based on the frequency of each color. Preference is given to colors that
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* are more interesting. Avoids the background color if it can be
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* discerned. Ignores sufficiently transparent colors.
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*
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* This is intended to be used on favicon images. Larger images take longer
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* to process, especially those with a larger number of unique colors. If
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* imageURI points to an image that has more than 128^2 pixels, this method
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* will fail before analyzing it for performance reasons.
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*
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* @param imageURI
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* A URI pointing to the image - ideally a data: URI, but any scheme
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* that will load when setting the src attribute of a DOM img element
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* should work.
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* @param callback
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* Function to call when the representative color is found or an
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* error occurs.
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*/
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void findRepresentativeColor(in nsIURI imageURI,
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in mozIRepresentativeColorCallback callback);
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};
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