player/js/mask.js

function MaskElement(data,element,globalData) {
    //TODO: check if dynamic properties array can be used from element
    this.dynamicProperties = [];
    this.data = data;
    this.element = element;
    this.globalData = globalData;
    this.storedData = [];
    this.masksProperties = this.data.masksProperties || [];
    this.maskElement = null;
    this.firstFrame = true;
    var defs = this.globalData.defs;
    var i, len = this.masksProperties ? this.masksProperties.length : 0;
    this.viewData = createSizedArray(len);
    this.solidPath = '';


    var path, properties = this.masksProperties;
    var count = 0;
    var currentMasks = [];
    var j, jLen;
    var layerId = randomString(10);
    var rect, expansor, feMorph,x;
    var maskType = 'clipPath', maskRef = 'clip-path';
    for (i = 0; i < len; i++) {

        if((properties[i].mode !== 'a' && properties[i].mode !== 'n')|| properties[i].inv || properties[i].o.k !== 100){
            maskType = 'mask';
            maskRef = 'mask';
        }

        if((properties[i].mode == 's' || properties[i].mode == 'i') && count == 0){
            rect = createNS( 'rect');
            rect.setAttribute('fill', '#ffffff');
            rect.setAttribute('width', this.element.comp.data.w);
            rect.setAttribute('height', this.element.comp.data.h);
            currentMasks.push(rect);
        } else {
            rect = null;
        }

        path = createNS( 'path');
        if(properties[i].mode == 'n') {
            // TODO move this to a factory or to a constructor
            this.viewData[i] = {
                op: PropertyFactory.getProp(this.element,properties[i].o,0,0.01,this.dynamicProperties),
                prop: ShapePropertyFactory.getShapeProp(this.element,properties[i],3,this.dynamicProperties,null),
                elem: path
            };
            defs.appendChild(path);
            continue;
        }
        count += 1;

        path.setAttribute('fill', properties[i].mode === 's' ? '#000000':'#ffffff');
        path.setAttribute('clip-rule','nonzero');

        if (properties[i].x.k !== 0) {
            maskType = 'mask';
            maskRef = 'mask';
            x = PropertyFactory.getProp(this.element,properties[i].x,0,null,this.dynamicProperties);
            var filterID = 'fi_'+randomString(10);
            expansor = createNS('filter');
            expansor.setAttribute('id',filterID);
            feMorph = createNS('feMorphology');
            feMorph.setAttribute('operator','dilate');
            feMorph.setAttribute('in','SourceGraphic');
            feMorph.setAttribute('radius','0');
            expansor.appendChild(feMorph);
            defs.appendChild(expansor);
            path.setAttribute('stroke', properties[i].mode === 's' ? '#000000':'#ffffff');
        } else {
            feMorph = null;
            x = null;
        }

        // TODO move this to a factory or to a constructor
        this.storedData[i] = {
             elem: path,
             x: x,
             expan: feMorph,
            lastPath: '',
            lastOperator:'',
            filterId:filterID,
            lastRadius:0
        };
        if(properties[i].mode == 'i'){
            jLen = currentMasks.length;
            var g = createNS('g');
            for(j=0;j<jLen;j+=1){
                g.appendChild(currentMasks[j]);
            }
            var mask = createNS('mask');
            mask.setAttribute('mask-type','alpha');
            mask.setAttribute('id',layerId+'_'+count);
            mask.appendChild(path);
            defs.appendChild(mask);
            g.setAttribute('mask','url(' + locationHref + '#'+layerId+'_'+count+')');

            currentMasks.length = 0;
            currentMasks.push(g);
        }else{
            currentMasks.push(path);
        }
        if(properties[i].inv && !this.solidPath){
            this.solidPath = this.createLayerSolidPath();
        }
        // TODO move this to a factory or to a constructor
        this.viewData[i] = {
            elem: path,
            lastPath: '',
            op: PropertyFactory.getProp(this.element,properties[i].o,0,0.01,this.dynamicProperties),
            prop:ShapePropertyFactory.getShapeProp(this.element,properties[i],3,this.dynamicProperties,null)
        };
        if(rect){
            //TODO: move the invRect property to the object definition in order to prevent a new hidden class creation.
            this.viewData[i].invRect = rect;
        }
        if(!this.viewData[i].prop.k){
            this.drawPath(properties[i],this.viewData[i].prop.v,this.viewData[i]);
        }
    }

    this.maskElement = createNS( maskType);

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

    if(count > 0){
        this.maskElement.setAttribute('id', layerId);
        this.element.maskedElement.setAttribute(maskRef, "url(" + locationHref + "#" + layerId + ")");
        defs.appendChild(this.maskElement);
    }

};

MaskElement.prototype.getMaskProperty = function(pos){
    return this.viewData[pos].prop;
};

MaskElement.prototype.prepareFrame = function(){
    var i, len = this.dynamicProperties.length;
    for(i=0;i<len;i+=1){
        this.dynamicProperties[i].getValue();

    }
};

MaskElement.prototype.renderFrame = function (finalMat) {
    var i, len = this.masksProperties.length;
    for (i = 0; i < len; i++) {
        if(this.viewData[i].prop.mdf || this.firstFrame){
            this.drawPath(this.masksProperties[i],this.viewData[i].prop.v,this.viewData[i]);
        }
        if(this.viewData[i].op.mdf || this.firstFrame){
            this.viewData[i].elem.setAttribute('fill-opacity',this.viewData[i].op.v);
        }
        if(this.masksProperties[i].mode !== 'n'){
            if(this.viewData[i].invRect && (this.element.finalTransform.mProp.mdf || this.firstFrame)){
                this.viewData[i].invRect.setAttribute('x', -finalMat.props[12]);
                this.viewData[i].invRect.setAttribute('y', -finalMat.props[13]);
            }
            if(this.storedData[i].x && (this.storedData[i].x.mdf || this.firstFrame)){
                var feMorph = this.storedData[i].expan;
                if(this.storedData[i].x.v < 0){
                    if(this.storedData[i].lastOperator !== 'erode'){
                        this.storedData[i].lastOperator = 'erode';
                        this.storedData[i].elem.setAttribute('filter','url(' + locationHref + '#'+this.storedData[i].filterId+')');
                    }
                    feMorph.setAttribute('radius',-this.storedData[i].x.v);
                }else{
                    if(this.storedData[i].lastOperator !== 'dilate'){
                        this.storedData[i].lastOperator = 'dilate';
                        this.storedData[i].elem.setAttribute('filter',null);
                    }
                    this.storedData[i].elem.setAttribute('stroke-width', this.storedData[i].x.v*2);

                }
            }
        }
    }
    this.firstFrame = false;
};

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

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

MaskElement.prototype.drawPath = function(pathData,pathNodes,viewData){
    var pathString = " M"+pathNodes.v[0][0]+','+pathNodes.v[0][1];
    var i, len;
    len = pathNodes._length;
    for(i=1;i<len;i+=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];
        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];
    }
        //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];
    if(pathNodes.c && len > 1){
        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;


    if(viewData.lastPath !== pathString){
        var pathShapeValue = '';
        if(viewData.elem){
            if(pathNodes.c){
                pathShapeValue = pathData.inv ? this.solidPath + pathString : pathString;
            }
            viewData.elem.setAttribute('d',pathShapeValue);
        }
        viewData.lastPath = pathString;
    }
};

MaskElement.prototype.destroy = function(){
    this.element = null;
    this.globalData = null;
    this.maskElement = null;
    this.data = null;
    this.masksProperties = null;
};