Node.js GM write()用法及代码示例

write() 函数是 GraphicsMagick 库中的内置函数，用于将图像写入文件。如果文件已经存在，那么它将被覆盖。该函数返回成功的真实值。

用法:

write( filename )

参数：该函数接受如上所述和如下所述的单个参数：

filename:该参数用于指定文件的名称。

返回值：该函数返回GraphicsMagick对象。

示例 1：

javascript


// Include gm library 
const gm = require('gm'); 
// Import the image 
gm(600, 300, 'white') 
// set the color for the stroke 
.stroke("green", 3) 
// Set the font 
.font("Helvetica.ttf", 60) 
// Invoke drawRectangle function with 
// x0: 10, y0: 100, x1:260, y1:210 
.drawRectangle(10, 100, 260, 210) 
// Invoke drawText in order to 
// name the box as 1 
.drawText(150, 170, "1") 
// Invoke drawrectangle function with 
// x0: 260, y0:100, x1: 350, y1: 210 
.drawRectangle(260, 100, 350, 210) 
// Invoke drawText in order to 
// name the box as 2 
.drawText(300, 170, "2") 
// Call to drawText Function 
.drawText(100, 280, "GeeksforGeeks!") 
// Process and write the image 
.write("drawRectangle1.png", function (err) { 
    if (!err) console.log('done'); 
});

输出：

示例2：覆盖文件。

javascript


// Include gm library 
const gm = require('gm'); 
//Import the image 
gm(600, 300, 'white') 
// set the color for the stroke 
.stroke("green", 3) 
// Set the font 
.font("Helvetica.ttf", 60) 
// Invoke drawRectangle function with 
// x0: 10, y0: 100, x1:260, y1:210, 
// wc: 40, wh: 40 
.drawRectangle(10, 100, 260, 210, 40, 40) 
// Invoke drawText in order to 
// name the box as 1 
.drawText(150, 170, "1") 
// Invoke drawrectangle function with 
// x0: 260, y0:100, x1: 350, y1: 210, 
// wc: 80, wh: 80 
.drawRectangle(260, 100, 350, 210, 80, 80) 
// Invoke drawText in order to 
// name the box as 2 
.drawText(300, 170, "2") 
// Call to drawText Function 
.drawText(100, 280, "GeeksforGeeks!") 
// Process and write the image 
.write("drawRectangle1.png", function (err) { 
    if (!err) console.log('done'); 
});

输出：

参考： https://www.npmjs.com/package/gm

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注：本文由纯净天空筛选整理自sarthak_ishu11大神的英文原创作品 Node.js GM write() Function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。