1回答

• 

  x米多米拉

  2018-08-08 10:29:18

  改成下面这样了，不知道还有没有问题，欢迎交流~

  var blurR = 50;

  for(var i = 0; i < canvasA.height; i++){

      for(var j = 0; j < canvasA.width; j++ ){

          var r = 0,g = 0,b = 0,totalNum = 0;

          for(var m = -blurR; m <= blurR; m++){

              for(var n = -blurR; n <= blurR;n++){

                  var x = i + m;

                  var y = j + n;

                  if(x<0||y<0||x >= canvasA.height ||y >= canvasA.width)

                  continue;

                  totalNum++;

                  var p = x*canvasA.width+y;

                  r += tmpData[4*p+0];

                  g += tmpData[4*p+1];

                  b += tmpData[4*p+2];

              }

          }

          var p = i*canvasA.width+j;

          tmpData[4*p+0] = r/totalNum;

          tmpData[4*p+1] = g/totalNum;

          tmpData[4*p+2] = b/totalNum;

      }

  }

  
  

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