/* global createNS */

function SVGTintFilter(filter, filterManager) {
  this.filterManager = filterManager;
  var feColorMatrix = createNS('feColorMatrix');
  feColorMatrix.setAttribute('type', 'matrix');
  feColorMatrix.setAttribute('color-interpolation-filters', 'linearRGB');
  feColorMatrix.setAttribute('values', '0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0');
  feColorMatrix.setAttribute('result', 'f1');
  filter.appendChild(feColorMatrix);
  feColorMatrix = createNS('feColorMatrix');
  feColorMatrix.setAttribute('type', 'matrix');
  feColorMatrix.setAttribute('color-interpolation-filters', 'sRGB');
  feColorMatrix.setAttribute('values', '1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0');
  feColorMatrix.setAttribute('result', 'f2');
  filter.appendChild(feColorMatrix);
  this.matrixFilter = feColorMatrix;
  if (filterManager.effectElements[2].p.v !== 100 || filterManager.effectElements[2].p.k) {
    var feMerge = createNS('feMerge');
    filter.appendChild(feMerge);
    var feMergeNode;
    feMergeNode = createNS('feMergeNode');
    feMergeNode.setAttribute('in', 'SourceGraphic');
    feMerge.appendChild(feMergeNode);
    feMergeNode = createNS('feMergeNode');
    feMergeNode.setAttribute('in', 'f2');
    feMerge.appendChild(feMergeNode);
  }
}

SVGTintFilter.prototype.renderFrame = function (forceRender) {
  if (forceRender || this.filterManager._mdf) {
    var colorBlack = this.filterManager.effectElements[0].p.v;
    var colorWhite = this.filterManager.effectElements[1].p.v;
    var opacity = this.filterManager.effectElements[2].p.v / 100;
    this.matrixFilter.setAttribute('values', (colorWhite[0] - colorBlack[0]) + ' 0 0 0 ' + colorBlack[0] + ' ' + (colorWhite[1] - colorBlack[1]) + ' 0 0 0 ' + colorBlack[1] + ' ' + (colorWhite[2] - colorBlack[2]) + ' 0 0 0 ' + colorBlack[2] + ' 0 0 0 ' + opacity + ' 0');
  }
};