269 lines
9.6 KiB
JavaScript
269 lines
9.6 KiB
JavaScript
"use strict";
|
|
|
|
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports["default"] = pluginCrop;
|
|
|
|
var _typeof2 = _interopRequireDefault(require("@babel/runtime/helpers/typeof"));
|
|
|
|
var _utils = require("@jimp/utils");
|
|
|
|
/* eslint-disable no-labels */
|
|
function pluginCrop(event) {
|
|
/**
|
|
* Crops the image at a given point to a give size
|
|
* @param {number} x the x coordinate to crop form
|
|
* @param {number} y the y coordinate to crop form
|
|
* @param w the width of the crop region
|
|
* @param h the height of the crop region
|
|
* @param {function(Error, Jimp)} cb (optional) a callback for when complete
|
|
* @returns {Jimp} this for chaining of methods
|
|
*/
|
|
event('crop', function (x, y, w, h, cb) {
|
|
if (typeof x !== 'number' || typeof y !== 'number') return _utils.throwError.call(this, 'x and y must be numbers', cb);
|
|
if (typeof w !== 'number' || typeof h !== 'number') return _utils.throwError.call(this, 'w and h must be numbers', cb); // round input
|
|
|
|
x = Math.round(x);
|
|
y = Math.round(y);
|
|
w = Math.round(w);
|
|
h = Math.round(h);
|
|
|
|
if (x === 0 && w === this.bitmap.width) {
|
|
// shortcut
|
|
var start = w * y + x << 2;
|
|
var end = start + h * w << 2;
|
|
this.bitmap.data = this.bitmap.data.slice(start, end);
|
|
} else {
|
|
var bitmap = Buffer.allocUnsafe(w * h * 4);
|
|
var offset = 0;
|
|
this.scanQuiet(x, y, w, h, function (x, y, idx) {
|
|
var data = this.bitmap.data.readUInt32BE(idx, true);
|
|
bitmap.writeUInt32BE(data, offset, true);
|
|
offset += 4;
|
|
});
|
|
this.bitmap.data = bitmap;
|
|
}
|
|
|
|
this.bitmap.width = w;
|
|
this.bitmap.height = h;
|
|
|
|
if ((0, _utils.isNodePattern)(cb)) {
|
|
cb.call(this, null, this);
|
|
}
|
|
|
|
return this;
|
|
});
|
|
return {
|
|
"class": {
|
|
/**
|
|
* Autocrop same color borders from this image
|
|
* @param {number} tolerance (optional): a percent value of tolerance for pixels color difference (default: 0.0002%)
|
|
* @param {boolean} cropOnlyFrames (optional): flag to crop only real frames: all 4 sides of the image must have some border (default: true)
|
|
* @param {function(Error, Jimp)} cb (optional): a callback for when complete (default: no callback)
|
|
* @returns {Jimp} this for chaining of methods
|
|
*/
|
|
autocrop: function autocrop() {
|
|
var w = this.bitmap.width;
|
|
var h = this.bitmap.height;
|
|
var minPixelsPerSide = 1; // to avoid cropping completely the image, resulting in an invalid 0 sized image
|
|
|
|
var cb; // callback
|
|
|
|
var leaveBorder = 0; // Amount of pixels in border to leave
|
|
|
|
var tolerance = 0.0002; // percent of color difference tolerance (default value)
|
|
|
|
var cropOnlyFrames = true; // flag to force cropping only if the image has a real "frame"
|
|
// i.e. all 4 sides have some border (default value)
|
|
|
|
var cropSymmetric = false; // flag to force cropping top be symmetric.
|
|
// i.e. north and south / east and west are cropped by the same value
|
|
// parse arguments
|
|
|
|
for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
|
|
args[_key] = arguments[_key];
|
|
}
|
|
|
|
for (var a = 0, len = args.length; a < len; a++) {
|
|
if (typeof args[a] === 'number') {
|
|
// tolerance value passed
|
|
tolerance = args[a];
|
|
}
|
|
|
|
if (typeof args[a] === 'boolean') {
|
|
// cropOnlyFrames value passed
|
|
cropOnlyFrames = args[a];
|
|
}
|
|
|
|
if (typeof args[a] === 'function') {
|
|
// callback value passed
|
|
cb = args[a];
|
|
}
|
|
|
|
if ((0, _typeof2["default"])(args[a]) === 'object') {
|
|
// config object passed
|
|
var config = args[a];
|
|
|
|
if (typeof config.tolerance !== 'undefined') {
|
|
tolerance = config.tolerance;
|
|
}
|
|
|
|
if (typeof config.cropOnlyFrames !== 'undefined') {
|
|
cropOnlyFrames = config.cropOnlyFrames;
|
|
}
|
|
|
|
if (typeof config.cropSymmetric !== 'undefined') {
|
|
cropSymmetric = config.cropSymmetric;
|
|
}
|
|
|
|
if (typeof config.leaveBorder !== 'undefined') {
|
|
leaveBorder = config.leaveBorder;
|
|
}
|
|
}
|
|
}
|
|
/**
|
|
* All borders must be of the same color as the top left pixel, to be cropped.
|
|
* It should be possible to crop borders each with a different color,
|
|
* but since there are many ways for corners to intersect, it would
|
|
* introduce unnecessary complexity to the algorithm.
|
|
*/
|
|
// scan each side for same color borders
|
|
|
|
|
|
var colorTarget = this.getPixelColor(0, 0); // top left pixel color is the target color
|
|
|
|
var rgba1 = this.constructor.intToRGBA(colorTarget); // for north and east sides
|
|
|
|
var northPixelsToCrop = 0;
|
|
var eastPixelsToCrop = 0;
|
|
var southPixelsToCrop = 0;
|
|
var westPixelsToCrop = 0; // north side (scan rows from north to south)
|
|
|
|
colorTarget = this.getPixelColor(0, 0);
|
|
|
|
north: for (var y = 0; y < h - minPixelsPerSide; y++) {
|
|
for (var x = 0; x < w; x++) {
|
|
var colorXY = this.getPixelColor(x, y);
|
|
var rgba2 = this.constructor.intToRGBA(colorXY);
|
|
|
|
if (this.constructor.colorDiff(rgba1, rgba2) > tolerance) {
|
|
// this pixel is too distant from the first one: abort this side scan
|
|
break north;
|
|
}
|
|
} // this row contains all pixels with the same color: increment this side pixels to crop
|
|
|
|
|
|
northPixelsToCrop++;
|
|
} // east side (scan columns from east to west)
|
|
|
|
|
|
colorTarget = this.getPixelColor(w, 0);
|
|
|
|
east: for (var _x = 0; _x < w - minPixelsPerSide; _x++) {
|
|
for (var _y = 0 + northPixelsToCrop; _y < h; _y++) {
|
|
var _colorXY = this.getPixelColor(_x, _y);
|
|
|
|
var _rgba = this.constructor.intToRGBA(_colorXY);
|
|
|
|
if (this.constructor.colorDiff(rgba1, _rgba) > tolerance) {
|
|
// this pixel is too distant from the first one: abort this side scan
|
|
break east;
|
|
}
|
|
} // this column contains all pixels with the same color: increment this side pixels to crop
|
|
|
|
|
|
eastPixelsToCrop++;
|
|
} // south side (scan rows from south to north)
|
|
|
|
|
|
colorTarget = this.getPixelColor(0, h);
|
|
|
|
south: for (var _y2 = h - 1; _y2 >= northPixelsToCrop + minPixelsPerSide; _y2--) {
|
|
for (var _x2 = w - eastPixelsToCrop - 1; _x2 >= 0; _x2--) {
|
|
var _colorXY2 = this.getPixelColor(_x2, _y2);
|
|
|
|
var _rgba2 = this.constructor.intToRGBA(_colorXY2);
|
|
|
|
if (this.constructor.colorDiff(rgba1, _rgba2) > tolerance) {
|
|
// this pixel is too distant from the first one: abort this side scan
|
|
break south;
|
|
}
|
|
} // this row contains all pixels with the same color: increment this side pixels to crop
|
|
|
|
|
|
southPixelsToCrop++;
|
|
} // west side (scan columns from west to east)
|
|
|
|
|
|
colorTarget = this.getPixelColor(w, h);
|
|
|
|
west: for (var _x3 = w - 1; _x3 >= 0 + eastPixelsToCrop + minPixelsPerSide; _x3--) {
|
|
for (var _y3 = h - 1; _y3 >= 0 + northPixelsToCrop; _y3--) {
|
|
var _colorXY3 = this.getPixelColor(_x3, _y3);
|
|
|
|
var _rgba3 = this.constructor.intToRGBA(_colorXY3);
|
|
|
|
if (this.constructor.colorDiff(rgba1, _rgba3) > tolerance) {
|
|
// this pixel is too distant from the first one: abort this side scan
|
|
break west;
|
|
}
|
|
} // this column contains all pixels with the same color: increment this side pixels to crop
|
|
|
|
|
|
westPixelsToCrop++;
|
|
} // decide if a crop is needed
|
|
|
|
|
|
var doCrop = false; // apply leaveBorder
|
|
|
|
westPixelsToCrop -= leaveBorder;
|
|
eastPixelsToCrop -= leaveBorder;
|
|
northPixelsToCrop -= leaveBorder;
|
|
southPixelsToCrop -= leaveBorder;
|
|
|
|
if (cropSymmetric) {
|
|
var horizontal = Math.min(eastPixelsToCrop, westPixelsToCrop);
|
|
var vertical = Math.min(northPixelsToCrop, southPixelsToCrop);
|
|
westPixelsToCrop = horizontal;
|
|
eastPixelsToCrop = horizontal;
|
|
northPixelsToCrop = vertical;
|
|
southPixelsToCrop = vertical;
|
|
} // make sure that crops are >= 0
|
|
|
|
|
|
westPixelsToCrop = westPixelsToCrop >= 0 ? westPixelsToCrop : 0;
|
|
eastPixelsToCrop = eastPixelsToCrop >= 0 ? eastPixelsToCrop : 0;
|
|
northPixelsToCrop = northPixelsToCrop >= 0 ? northPixelsToCrop : 0;
|
|
southPixelsToCrop = southPixelsToCrop >= 0 ? southPixelsToCrop : 0; // safety checks
|
|
|
|
var widthOfRemainingPixels = w - (westPixelsToCrop + eastPixelsToCrop);
|
|
var heightOfRemainingPixels = h - (southPixelsToCrop + northPixelsToCrop);
|
|
|
|
if (cropOnlyFrames) {
|
|
// crop image if all sides should be cropped
|
|
doCrop = eastPixelsToCrop !== 0 && northPixelsToCrop !== 0 && westPixelsToCrop !== 0 && southPixelsToCrop !== 0;
|
|
} else {
|
|
// crop image if at least one side should be cropped
|
|
doCrop = eastPixelsToCrop !== 0 || northPixelsToCrop !== 0 || westPixelsToCrop !== 0 || southPixelsToCrop !== 0;
|
|
}
|
|
|
|
if (doCrop) {
|
|
// do the real crop
|
|
this.crop(eastPixelsToCrop, northPixelsToCrop, widthOfRemainingPixels, heightOfRemainingPixels);
|
|
}
|
|
|
|
if ((0, _utils.isNodePattern)(cb)) {
|
|
cb.call(this, null, this);
|
|
}
|
|
|
|
return this;
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
module.exports = exports.default;
|
|
//# sourceMappingURL=index.js.map
|