1.1 KiB
1.1 KiB
@jimp/utils
Utils for jimp extensions.
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;
});
}