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@jimp/utils
Advanced tools
Readme
Utils for jimp extensions.
Determines if function was passed an node callback.
if (isNodePattern(cb)) {
cb.call(this, null, this);
}
Either throws the error or calls the callback with the error.
if (/* check for error */) {
return throwError.call(this, 'someError', cb);
}
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;
}
);
}
It's possible to make an iterator scan with a for ... of
, if you want to break
the scan before it reaches the end, but note, that this iterator has a huge performance implication:
for (const { x, y, idx, image } of scanIterator(
image,
0,
0,
image.bitmap.width,
image.bitmap.height
)) {
}
FAQs
Utils for jimp extensions.
The npm package @jimp/utils receives a total of 959,078 weekly downloads. As such, @jimp/utils popularity was classified as popular.
We found that @jimp/utils demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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