1.6.0 • Published 9 months ago

@jimp/test-utils v1.6.0

Weekly downloads
11
License
MIT
Repository
-
Last release
9 months ago

Available Methods

isNodePattern

Determines if function was passed an node callback.

if (isNodePattern(cb)) {
  cb.call(this, null, this);
}

throwError

Either throws the error or calls the callback with the error.

if (/* check for error */) {
  return throwError.call(this, 'someError', cb);
}

scan

Scans through a region of the bitmap, calling a function for each pixel.

function removeRed(image) {
  return scan(image, 0, 0, image.bitmap.width, image.bitmap.height, function(
    x,
    y,
    index
  ) {
    const red = this.bitmap.data[index + 0];
    const green = this.bitmap.data[index + 1];
    const blue = this.bitmap.data[index + 2];
    const alpha = this.bitmap.data[index + 3];

    this.bitmap.data[index + 0] = 0;
    this.bitmap.data[index + 1] = green;
    this.bitmap.data[index + 2] = blue;
    this.bitmap.data[index + 3] = alpha;
  });
}
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