📜  节点吉普 | scaleToFit

📅  最后修改于: 2022-05-13 01:56:54.028000             🧑  作者: Mango

节点吉普 | scaleToFit

简介:scaleToFit()函数是 Nodejs 中的内置函数| Jimp 将图像缩放到适合具有给定宽度和高度的矩形内的最大尺寸。

句法:

scaleToFit(w, h, mode, cb)

范围:

  • w - 此参数存储图像的宽度。
  • h - 此参数存储图像的高度。
  • mode – 这是存储缩放方法的可选参数。
  • cb – 这是编译完成时调用的可选参数。

输入图像:

设置环境:

npm init -y

安装依赖:

npm install jimp 

示例 1:

javascript
// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
  const image = await Jimp.read('
    https://media.geeksforgeeks.org/wp-content/uploads/20190328185307/gfg28.png');
// scaleToFit Function having width and height
  image.scaleToFit(300, 300)
  .write('scaleToFit1.png');
}
 
main();
  console.log('Image Processing Completed');


javascript
// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
  const image = await Jimp.read('
   https://media.geeksforgeeks.org/wp-content/uploads/20190328185333/gfg111.png');
// scaleToFit Function having width, height, mode and callback function
  image.scaleToFit(1000, 1700, Jimp.RESIZE_BEZIER, function(err){
    if (err) throw err;
  })
  .write('scaleToFit2.png');
}
 
main();
  console.log('Image Processing Completed');


输出:

示例 2:使用 mode 和 cb(可选参数)

javascript

// npm install --save jimp
// import jimp library to the environment
var Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
  const image = await Jimp.read('
   https://media.geeksforgeeks.org/wp-content/uploads/20190328185333/gfg111.png');
// scaleToFit Function having width, height, mode and callback function
  image.scaleToFit(1000, 1700, Jimp.RESIZE_BEZIER, function(err){
    if (err) throw err;
  })
  .write('scaleToFit2.png');
}
 
main();
  console.log('Image Processing Completed');

输出:

参考: https://www.npmjs.com/package/jimp