player/js/mask.js

function MaskElement(data,element,globalData) {
    this.data = data;
    this.storedData = [];
    this.element = element;
    this.globalData = globalData;
    this.paths = [];
    this.registeredEffects = [];
    this.masksProperties = [];
    this.maskElement = document.createElementNS(svgNS, 'mask');
}

MaskElement.prototype.init = function () {
    this.masksProperties = this.data.masksProperties;
    var maskedElement = this.element.maskedElement;
    var defs = this.globalData.defs;
    var i=0, len = this.masksProperties.length;

    this.layerSize = this.element.getLayerSize();

    var path, properties = this.data.masksProperties;
    var count = 0;
    var currentMasks = [];
    var j, jLen;
    var layerId = randomString(10);
    var rect;
    this.maskElement = document.createElementNS(svgNS, 'mask');
    for (i = 0; i < len; i++) {
        if(properties[i].inv && !this.solidPath){
            this.solidPath = this.createLayerSolidPath();
        }

        //console.log('properties[i].mode: ',properties[i].mode);
        if((properties[i].mode == 's' || properties[i].mode == 'i') && count == 0){
            rect = document.createElementNS(svgNS, 'rect');
            rect.setAttribute('fill', '#ffffff');
            rect.setAttribute('x', '0');
            rect.setAttribute('y', '0');
            rect.setAttribute('width', '100%');
            rect.setAttribute('height', '100%');
            currentMasks.push(rect);
        }

        if((properties[i].mode == 'f' && count > 0) || properties[i].mode == 'n') {
            continue;
        }
        count += 1;
        path = document.createElementNS(svgNS, 'path');
        if (properties[i].cl) {
            if(properties[i].mode == 's'){
                path.setAttribute('fill', '#000000');
            }else{
                path.setAttribute('fill', '#ffffff');
            }
        } else {
            path.setAttribute('fill', 'none');
            if(properties[i].mode == 's'){
                path.setAttribute('fill', '#000000');
            }else{
                path.setAttribute('fill', '#ffffff');
            }
            path.setAttribute('stroke-width', '1');
            path.setAttribute('stroke-miterlimit', '10');
        }
        path.setAttribute('clip-rule','nonzero');
        this.storedData[i] = {
         elem: path,
            lastPath: ''
        };
        if(properties[i].mode == 'i'){
            jLen = currentMasks.length;
            var g = document.createElementNS(svgNS,'g');
            for(j=0;j<jLen;j+=1){
                g.appendChild(currentMasks[j]);
            }
            var mask = document.createElementNS(svgNS,'mask');
            mask.setAttribute('mask-type','alpha');
            mask.setAttribute('id',layerId+'_'+count);
            mask.appendChild(path);
            defs.appendChild(mask);
            g.setAttribute('mask','url(#'+layerId+'_'+count+')');

            currentMasks.length = 0;
            currentMasks.push(g);
        }else{
            currentMasks.push(path);
        }
    }

    len = currentMasks.length;
    for(i=0;i<len;i+=1){
        this.maskElement.appendChild(currentMasks[i]);
    }

    this.maskElement.setAttribute('id', layerId);
    if(count > 0){
        maskedElement.setAttribute("mask", "url(#" + layerId + ")");
    }

    defs.appendChild(this.maskElement);
};

MaskElement.prototype.renderFrame = function (num) {
    var i, len = this.data.masksProperties.length;
    var count = 0;
    for (i = 0; i < len; i++) {
        if((this.data.masksProperties[i].mode == 'f' && count > 0)  || this.data.masksProperties[i].mode == 'n'){
            continue;
        }
        count += 1;
        this.drawPath(this.data.masksProperties[i],this.data.masksProperties[i].paths[num].pathNodes,this.storedData[i]);
    }
};

MaskElement.prototype.processMaskFromEffects = function (num, masks) {
    var i, len = this.registeredEffects.length;
    for (i = 0; i < len; i++) {
        this.registeredEffects[i].renderMask(num, masks);
    }
};

MaskElement.prototype.registerEffect = function (effect) {
    this.registeredEffects.push(effect);
};

MaskElement.prototype.getMaskelement = function () {
    return this.maskElement;
};

MaskElement.prototype.createLayerSolidPath = function(){
    var path = 'M0,0 ';
    path += 'h' + this.layerSize.w;
    path += 'v' + this.layerSize.h;
    path += 'h' + -this.layerSize.w;
    path += 'v' + -this.layerSize.h;
    return path;
};

MaskElement.prototype.drawPath = function(pathData,pathNodes,storedData){
    var pathString = '';
    var i, len;
    if(!pathNodes.__renderedString){
        len = pathNodes.v.length;
            for(i=1;i<len;i+=1){
                if(i==1){
                    pathString += " M"+pathNodes.v[0][0]+','+pathNodes.v[0][1];
                }
                pathString += " C"+pathNodes.o[i-1][0]+','+pathNodes.o[i-1][1] + " "+pathNodes.i[i][0]+','+pathNodes.i[i][1] + " "+pathNodes.v[i][0]+','+pathNodes.v[i][1];
            }
            if(pathData.cl){
                pathString += " C"+pathNodes.o[i-1][0]+','+pathNodes.o[i-1][1] + " "+pathNodes.i[0][0]+','+pathNodes.i[0][1] + " "+pathNodes.v[0][0]+','+pathNodes.v[0][1];
            }
        pathNodes.__renderedString = pathString;
    }else{
        pathString = pathNodes.__renderedString;
    }



    if(storedData.lastPath !== pathString){
        if(pathData.inv){
            storedData.elem.setAttribute('d',this.solidPath+pathString);
        }else{
            storedData.elem.setAttribute('d',pathString);
        }
        storedData.lastPath = pathString;
    }
};