chrome/test/data/third_party/kraken/tests/kraken-1.1/imaging-gaussian-blur.js

   1 //print("i: " + i + "j: " + j);
   2
   3 function gaussianBlur() {
   4     for (var y = 0; y < height; ++y) {
   5         for (var x = 0; x < width; ++x) {
   6             var r = 0, g = 0, b = 0, a = 0;
   7             for (var j = 1 - kernelSize; j < kernelSize; ++j) {
   8                 if (y + j < 0 || y + j >= height) continue;
   9                 for (var i = 1 - kernelSize; i < kernelSize; ++i) {
  10                     if (x + i < 0 || x + i >= width) continue;
  11                     r += squidImageData[4 * ((y + j) * width + (x + i)) + 0] * kernel[Math.abs(j)][Math.abs(i)];
  12                     g += squidImageData[4 * ((y + j) * width + (x + i)) + 1] * kernel[Math.abs(j)][Math.abs(i)];
  13                     b += squidImageData[4 * ((y + j) * width + (x + i)) + 2] * kernel[Math.abs(j)][Math.abs(i)];
  14                     a += squidImageData[4 * ((y + j) * width + (x + i)) + 3] * kernel[Math.abs(j)][Math.abs(i)];
  15                 }
  16             }
  17             squidImageData[4 * (y * width + x) + 0] = r / kernelSum;
  18             squidImageData[4 * (y * width + x) + 1] = g / kernelSum;
  19             squidImageData[4 * (y * width + x) + 2] = b / kernelSum;
  20             squidImageData[4 * (y * width + x) + 3] = a / kernelSum;
  21         }
  22     }
  23     return squidImageData;
  24 }
  25 gaussianBlur();