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mobile-query-three-plugins-assets-vendor-pixastic-actions-lighten.js / js



  /*
   * Pixastic Lib - Lighten filter - v0.1.1
   * Copyright (c) 2008 Jacob Seidelin, jseidelin@nihilogic.dk, http://blog.nihilogic.dk/
   * License: [http://www.pixastic.com/lib/license.txt]
   */
  
  Pixastic.Actions.lighten = {
  
          process : function(params) {
                  var amount = parseFloat(params.options.amount) || 0;
                  amount = Math.max(-1, Math.min(1, amount));
  
                  if (Pixastic.Client.hasCanvasImageData()) {
                          var data = Pixastic.prepareData(params);
                          var rect = params.options.rect;
  
                          var p = rect.width * rect.height;
  
                          var pix = p*4, pix1 = pix + 1, pix2 = pix + 2;
                          var mul = amount + 1;
  
                          while (p--) {
                                  if ((data[pix-=4] = data[pix] * mul) > 255)
                                          data[pix] = 255;
  
                                  if ((data[pix1-=4] = data[pix1] * mul) > 255)
                                          data[pix1] = 255;
  
                                  if ((data[pix2-=4] = data[pix2] * mul) > 255)
                                          data[pix2] = 255;
  
                          }
  
                          return true;
  
                  } else if (Pixastic.Client.isIE()) {
                          var img = params.image;
                          if (amount < 0) {
                                  img.style.filter += " light()";
                                  img.filters[img.filters.length-1].addAmbient(
                                          255,255,255,
                                          100 * -amount
                                  );
                          } else if (amount > 0) {
                                  img.style.filter += " light()";
                                  img.filters[img.filters.length-1].addAmbient(
                                          255,255,255,
                                          100
                                  );
                                  img.filters[img.filters.length-1].addAmbient(
                                          255,255,255,
                                          100 * amount
                                  );
                          }
                          return true;
                  }
          },
          checkSupport : function() {
                  return (Pixastic.Client.hasCanvasImageData() || Pixastic.Client.isIE());
          }
  }
  


(C) Æliens 04/09/2009

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