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- "use strict";
- Object.defineProperty(exports, "__esModule", {
- value: true
- });
- exports["default"] = void 0;
- var _utils = require("@jimp/utils");
- /**
- * Rotates an image clockwise by an arbitrary number of degrees. NB: 'this' must be a Jimp object.
- * @param {number} deg the number of degrees to rotate the image by
- * @param {string|boolean} mode (optional) resize mode or a boolean, if false then the width and height of the image will not be changed
- */
- function advancedRotate(deg, mode) {
- deg %= 360;
- var rad = deg * Math.PI / 180;
- var cosine = Math.cos(rad);
- var sine = Math.sin(rad); // the final width and height will change if resize == true
- var w = this.bitmap.width;
- var h = this.bitmap.height;
- if (mode === true || typeof mode === 'string') {
- // resize the image to it maximum dimension and blit the existing image
- // onto the center so that when it is rotated the image is kept in bounds
- // http://stackoverflow.com/questions/3231176/how-to-get-size-of-a-rotated-rectangle
- // Plus 1 border pixel to ensure to show all rotated result for some cases.
- w = Math.ceil(Math.abs(this.bitmap.width * cosine) + Math.abs(this.bitmap.height * sine)) + 1;
- h = Math.ceil(Math.abs(this.bitmap.width * sine) + Math.abs(this.bitmap.height * cosine)) + 1; // Ensure destination to have even size to a better result.
- if (w % 2 !== 0) {
- w++;
- }
- if (h % 2 !== 0) {
- h++;
- }
- var c = this.cloneQuiet();
- this.scanQuiet(0, 0, this.bitmap.width, this.bitmap.height, function (x, y, idx) {
- this.bitmap.data.writeUInt32BE(this._background, idx);
- });
- var max = Math.max(w, h, this.bitmap.width, this.bitmap.height);
- this.resize(max, max, mode);
- this.blit(c, this.bitmap.width / 2 - c.bitmap.width / 2, this.bitmap.height / 2 - c.bitmap.height / 2);
- }
- var bW = this.bitmap.width;
- var bH = this.bitmap.height;
- var dstBuffer = Buffer.alloc(this.bitmap.data.length);
- function createTranslationFunction(deltaX, deltaY) {
- return function (x, y) {
- return {
- x: x + deltaX,
- y: y + deltaY
- };
- };
- }
- var translate2Cartesian = createTranslationFunction(-(bW / 2), -(bH / 2));
- var translate2Screen = createTranslationFunction(bW / 2 + 0.5, bH / 2 + 0.5);
- for (var y = 1; y <= bH; y++) {
- for (var x = 1; x <= bW; x++) {
- var cartesian = translate2Cartesian(x, y);
- var source = translate2Screen(cosine * cartesian.x - sine * cartesian.y, cosine * cartesian.y + sine * cartesian.x);
- var dstIdx = bW * (y - 1) + x - 1 << 2;
- if (source.x >= 0 && source.x < bW && source.y >= 0 && source.y < bH) {
- var srcIdx = (bW * (source.y | 0) + source.x | 0) << 2;
- var pixelRGBA = this.bitmap.data.readUInt32BE(srcIdx);
- dstBuffer.writeUInt32BE(pixelRGBA, dstIdx);
- } else {
- // reset off-image pixels
- dstBuffer.writeUInt32BE(this._background, dstIdx);
- }
- }
- }
- this.bitmap.data = dstBuffer;
- if (mode === true || typeof mode === 'string') {
- // now crop the image to the final size
- var _x = bW / 2 - w / 2;
- var _y = bH / 2 - h / 2;
- this.crop(_x, _y, w, h);
- }
- }
- var _default = function _default() {
- return {
- /**
- * Rotates the image clockwise by a number of degrees. By default the width and height of the image will be resized appropriately.
- * @param {number} deg the number of degrees to rotate the image by
- * @param {string|boolean} mode (optional) resize mode or a boolean, if false then the width and height of the image will not be changed
- * @param {function(Error, Jimp)} cb (optional) a callback for when complete
- * @returns {Jimp} this for chaining of methods
- */
- rotate: function rotate(deg, mode, cb) {
- // enable overloading
- if (typeof mode === 'undefined' || mode === null) {
- // e.g. image.resize(120);
- // e.g. image.resize(120, null, cb);
- // e.g. image.resize(120, undefined, cb);
- mode = true;
- }
- if (typeof mode === 'function' && typeof cb === 'undefined') {
- // e.g. image.resize(120, cb);
- cb = mode;
- mode = true;
- }
- if (typeof deg !== 'number') {
- return _utils.throwError.call(this, 'deg must be a number', cb);
- }
- if (typeof mode !== 'boolean' && typeof mode !== 'string') {
- return _utils.throwError.call(this, 'mode must be a boolean or a string', cb);
- }
- advancedRotate.call(this, deg, mode, cb);
- if ((0, _utils.isNodePattern)(cb)) {
- cb.call(this, null, this);
- }
- return this;
- }
- };
- };
- exports["default"] = _default;
- //# sourceMappingURL=index.js.map
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