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Contents?: true
Size: 1.97 KB
Versions: 4
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Stored size: 1.97 KB
Contents
o: ActiveSupport::Cache::Entry :@compressedF:@expires_in0:@created_atf1380709792.40002: @value"u{I"
class:ETI"BundledAsset;FI"logical_path;TI"Core/getImagePixels.js;TI"
pathname;TI"T/Users/bogumil/www/engines/cesium/app/assets/javascripts/Core/getImagePixels.js;FI"content_type;TI"application/javascript;TI"
mtime;TI" 2013-10-02T12:16:28+02:00;TI" length;Ti�I" digest;TI"%8871f7c1e75f552dc0fcc7a182273099;FI" source;TI"�/*global define*/
define(['Core/defined'], function(defined) {
"use strict";
var context2DsByWidthAndHeight = {};
/**
* Extract a pixel array from a loaded image. Draws the image
* into a canvas so it can read the pixels back.
*
* @exports getImagePixels
*
* @param {Image} image The image to extract pixels from.
*
* @returns {CanvasPixelArray} The pixels of the image.
*/
var getImagePixels = function(image, width, height) {
if (!defined(width)) {
width = image.width;
}
if (!defined(height)) {
height = image.height;
}
var context2DsByHeight = context2DsByWidthAndHeight[width];
if (!defined(context2DsByHeight)) {
context2DsByHeight = {};
context2DsByWidthAndHeight[width] = context2DsByHeight;
}
var context2d = context2DsByHeight[height];
if (!defined(context2d)) {
var canvas = document.createElement('canvas');
canvas.width = width;
canvas.height = height;
context2d = canvas.getContext('2d');
context2d.globalCompositeOperation = 'copy';
context2DsByHeight[height] = context2d;
}
context2d.drawImage(image, 0, 0, width, height);
return context2d.getImageData(0, 0, width, height).data;
};
return getImagePixels;
});
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Version data entries
4 entries across 4 versions & 1 rubygems