ImageryLayer - client side pixel filter

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        function maskPixels(pixelData) {
          if (pixelData == null || pixelData.pixelBlock == null) {
            return;
          }
          if (currentMin == null || currentMax == null) {
            // layer is loaded get the min and max temp values from the layer
            updatePixelFilter();
          }

          // The pixelBlock stores the values of all pixels visible in the view
          const pixelBlock = pixelData.pixelBlock;
          // The pixels visible in the view
          const pixels = pixelBlock.pixels;
          let mask = pixelBlock.mask;

          // The number of pixels in the pixelBlock
          const numPixels = pixelBlock.width * pixelBlock.height;

          // Get the min and max values of the data in the current view
          const minVal = pixelData.pixelBlock.statistics[0].minValue;
          const maxVal = pixelData.pixelBlock.statistics[0].maxValue;

          // Calculate the factor by which to determine the red and blue
          // values in the colorized version of the layer
          const factor = 255.0 / (maxVal - minVal);
          if (pixels == null) {
            return;
          }

          // Get the pixels containing temperature values in the only band of the data
          const tempBand = pixels[0];
          const p1 = pixels[0];
          // Create empty arrays for each of the RGB bands to set on the pixelBlock
          const rBand = new Uint8Array(p1.length);
          const gBand = new Uint8Array(p1.length);
          const bBand = new Uint8Array(p1.length);

          if (mask == null) {
            mask = new Uint8Array(p1.length); //mask = new Uint8Array(p1.length);
            mask.fill(1);
            pixelBlock.mask = mask;
          }

          // Loop through all the pixels in the view
          for (let i = 0; i < numPixels; i++) {
            // skip noData pixels
            if (mask[i] ===0) {
              continue;
            }
            const tempValue = tempBand[i];
            const red = (tempValue - minVal) * factor;
            mask[i] =
              p1[i] >= Math.floor(currentMin) && p1[i] <= Math.floor(currentMax)
                ? 1
                : 0;

            //apply color based on temperature value of each pixel
            if (mask[i]) {
              // p[i] = Math.floor((p1[i] - minVal) * factor);
              rBand[i] = red;
              gBand[i] = 0;
              bBand[i] = 255 - red;
            }
          }

          // Set the new pixel values on the pixelBlock
          pixelData.pixelBlock.pixels = [rBand, gBand, bBand]; //assign rgb values to each pixel
          pixelData.pixelBlock.statistics = null;
          pixelData.pixelBlock.pixelType = "u8";
        }