https://mebel-3d.ru/templates/tz_dekor_joomla/js/resize.js

1/**
2 * ------------------------------------------------------------------------
3 * resizeImage Plugin
4 * ------------------------------------------------------------------------
5 * Copyright (C) 2012-2013 SUNLAND Co., JSC. All Rights Reserved.
6 * license - GNU/GPL, http://www.gnu.org/licenses/gpl.html
7 * Author: Sonle
8 * Email: [email protected]
9 * Websites: http://www.templaza.com
10 * ------------------------------------------------------------------------
11 */
12
13
14
15function TzTemplateResizeImage(obj){
16
17    var widthStage;
18    var heightStage ;
19    var widthImage;
20    var heightImage;
21
22    obj.each(function (i,el){
23        heightStage = jQuery(this).height();
24        widthStage = jQuery (this).width();
25        var img_url = jQuery(this).find('img').attr('src');
26        var image = new Image();
27        image.src = img_url;
28        image.onload = function() {
29        }
30        widthImage = image.naturalWidth;
31        heightImage = image.naturalHeight;
32        var tzimg	=	new resizeImage(widthImage, heightImage, widthStage, heightStage);
33
34        jQuery(this).find('img').css ({ top: tzimg.top, left: tzimg.left, width: tzimg.width, height: tzimg.height });
35    });
36}
37
38var resizeImage = function (widthImage, heightImage, widthStage, heightStage) {
39
40    var escImageX = widthStage / widthImage;
41    var escImageY = heightStage / heightImage;
42
43    var escalaImage = (escImageX > escImageY) ? escImageX : escImageY;
44
45    var widthV = widthImage * escalaImage;
46    var heightV = heightImage * escalaImage;
47    var posImageY = 0;
48    var posImageX = 0;
49
50    if (heightV > heightStage) {
51        posImageY = (heightStage - heightV) / 2;
52    };
53
54    if (widthV > widthStage) {
55        posImageX = (widthStage - widthV) / 2;
56    };
57    return { top: posImageY, left: posImageX, width: widthV, height: heightV };
58};