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//
// https://github.com/sukhoi1, 25 Jan 2016
// bicubic-img-interpolation v0.1.0 jQuery plugin


$.fn.bicubicImgInterpolation = function(settings) {
var self = this;
$(self).each(function() {
if(this.tagName === "IMG") {
var src = $(this).attr('src');
var imgW = this.width;
var imgH = this.height;
$(this).after("<canvas style='display: none' width='" + imgW +  "' height='" + imgH + "'></canvas>");
var can = $(this).next()[0];
var callback = drawHighResolutionImgThumbnail;
drawCanvas(can, imgW*6, imgH*6, src, callback, this, settings.crossOrigin);
}
});
function drawCanvas(can, imgW, imgH, src, callback, imgEl, crossOrigin) {
var ctx = can.getContext('2d');
var img = new Image();
if(crossOrigin) {
    img.setAttribute('crossOrigin', 'anonymous'); //tainted canvases may not be exported chrome, ie will also throw security error
}
var w = imgW;
var h = imgH;
img.onload = function() {
// Step it down several times
var can2 = document.createElement('canvas');
can2.width = w;
can2.height = h;
var ctx2 = can2.getContext('2d');
// Draw it at 1/2 size 3 times (step down three times), making sure we don't overlap it
ctx2.drawImage(img, 0, 0, w/2, h/2);
ctx2.drawImage(can2, 0, 0, w/2, h/2, w/2, h/2, w/4, h/4);
ctx.drawImage(can2, w/2, h/2, w/4, h/4, 0, 0, w/6, h/6);
if(callback) {
callback(can, this.src, imgEl);
}
};
img.src = src;
};
function drawHighResolutionImgThumbnail(can, attrSrc, imgEl) {
$(imgEl).attr('src', can.toDataURL("image/png"));
$(imgEl).attr('data-src', attrSrc);
};
};
/*$( document ).ready(function() {
$('#new-pokemon-LnDjWl2 img[src*="Icon"]').bicubicImgInterpolation({
crossOrigin: 'anonymous' //only for demo purpose (external img source is requested) otherwise browser security error is triggered
    });
});*/

Aktuelle Version vom 16. November 2019, 14:36 Uhr

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