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{ throwError, isNodePattern } from '@jimp/utils';\n\nfunction rotate90degrees(bitmap, dstBuffer, clockwise) {\n const dstOffsetStep = clockwise ? -4 : 4;\n let dstOffset = clockwise ? dstBuffer.length - 4 : 0;\n\n let tmp;\n let x;\n let y;\n let srcOffset;\n\n for (x = 0; x < bitmap.width; x++) {\n for (y = bitmap.height - 1; y >= 0; y--) {\n srcOffset = (bitmap.width * y + x) << 2;\n tmp = bitmap.data.readUInt32BE(srcOffset, true);\n dstBuffer.writeUInt32BE(tmp, dstOffset, true);\n dstOffset += dstOffsetStep;\n }\n }\n}\n\n/**\n * Rotates an image clockwise by an arbitrary number of degrees. 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By default the width and height of the image will be resized appropriately.\n * @param {number} deg the number of degrees to rotate the image by\n * @param {string|boolean} mode (optional) resize mode or a boolean, if false then the width and height of the image will not be changed\n * @param {function(Error, Jimp)} cb (optional) a callback for when complete\n * @returns {Jimp} this for chaining of methods\n */\n rotate(deg, mode, cb) {\n // enable overloading\n if (typeof mode === 'undefined' || mode === null) {\n // e.g. image.resize(120);\n // e.g. image.resize(120, null, cb);\n // e.g. image.resize(120, undefined, cb);\n mode = true;\n }\n\n if (typeof mode === 'function' && typeof cb === 'undefined') {\n // e.g. image.resize(120, cb);\n cb = mode;\n mode = true;\n }\n\n if (typeof deg !== 'number') {\n return throwError.call(this, 'deg must be a number', cb);\n }\n\n if (typeof mode !== 'boolean' && typeof mode !== 'string') {\n return throwError.call(this, 'mode must be a boolean or a string', cb);\n }\n\n advancedRotate.call(this, deg, mode, cb);\n\n if (isNodePattern(cb)) {\n cb.call(this, null, this);\n }\n\n return this;\n }\n});\n"],"file":"index.js"} |