player/js/elements/canvasElements/CVImageElement.js

function CVImageElement(data, globalData, comp){
    this.failed = false;
    this.assetData = globalData.getAssetData(data.refId);
    this.img = globalData.imageLoader.getImage(this.assetData);
    this.initElement(data,globalData,comp);
}
extendPrototype([BaseElement, TransformElement, CVBaseElement, HierarchyElement, FrameElement, RenderableElement], CVImageElement);

CVImageElement.prototype.initElement = SVGShapeElement.prototype.initElement;
CVImageElement.prototype.prepareFrame = IImageElement.prototype.prepareFrame;

CVImageElement.prototype.createContent = function(){

    if (this.img.width && (this.assetData.w !== this.img.width || this.assetData.h !== this.img.height)) {
        var canvas = createTag('canvas');
        canvas.width = this.assetData.w;
        canvas.height = this.assetData.h;
        var ctx = canvas.getContext('2d');

        var imgW = this.img.width;
        var imgH = this.img.height;
        var imgRel = imgW / imgH;
        var canvasRel = this.assetData.w/this.assetData.h;
        var widthCrop, heightCrop;
        var par = this.assetData.pr || this.globalData.renderConfig.imagePreserveAspectRatio;
        if((imgRel > canvasRel && par === 'xMidYMid slice') || (imgRel < canvasRel && par !== 'xMidYMid slice')) {
            heightCrop = imgH;
            widthCrop = heightCrop*canvasRel;
        } else {
            widthCrop = imgW;
            heightCrop = widthCrop/canvasRel;
        }
        ctx.drawImage(this.img,(imgW-widthCrop)/2,(imgH-heightCrop)/2,widthCrop,heightCrop,0,0,this.assetData.w,this.assetData.h);
        this.img = canvas;
    }

};

CVImageElement.prototype.renderInnerContent = function(parentMatrix){
    if (this.failed) {
        return;
    }
    this.canvasContext.drawImage(this.img, 0, 0);
};

CVImageElement.prototype.destroy = function(){
    this.img = null;
};