Cross-platform image decoder(webp/png/jpeg/gif) and encoder(webp/png/jpeg) for Node.js
npm install node-images!images logo
===========
Cross-platform image decoder(png/jpeg/gif) and encoder(png/jpeg) for Node.js
Node.js轻量级跨平台图像编解码库
`` javascript
var images = require("images");
images("input.jpg") //Load image from file
//加载图像文件
.size(400) //Geometric scaling the image to 400 pixels width
//等比缩放图像到400像素宽
.draw(images("logo.png"), 10, 10) //Drawn logo at coordinates (10,10)
//在(10,10)处绘制Logo
.save("output.jpg", { //Save the image to a file,whih quality 50
quality : 50 //保存图片到文件,图片质量为50
});
`Features 功能特性
* Lightweight:no need to install any image processing library.
* 轻量级：无需安装任何图像处理库。
* Cross-platform: Released a compiled .node file on windows, just download and start.
* 跨平台：Windows下发布了编译好的.node文件,下载就能用。
* Easy-to-use: Provide jQuery-like chaining API.Simple and reliable!
* 方便用：jQuery风格的API，简单可依赖。
If the installation fails, try to install the following libraries.
+ giflib 4.x.x
+ libpng 1.5.x
+ jpeg-turbo 1.x.x
Above these are installed by default most linux/unix
node-images provide jQuery-like Chaining API,You can start the chain like this:
node-images 提供了类似jQuery的链式调用API,您可以这样开始:
`javascript
/ Load and decode image from file /
/ 从指定文件加载并解码图像 /
images(file)
/ Create a new transparent image /
/ 创建一个指定宽高的透明图像 /
images(width, height)
/ Load and decode image from a buffer /
/ 从Buffer数据中解码图像 /
images(buffer[, start[, end]])
/ Copy from another image /
/ 从另一个图像中复制区域来创建图像 /
images(image[, x, y, width, height])
`
Fill image with color
以指定颜色填充图像$3
Draw image on the current image position( x , y )
在当前图像( x , y )上绘制 image 图像$3
eg:
Encode image to buffer, config is image setting.
以指定格式编码当前图像到Buffer，config为图片设置，目前支持设置JPG图像质量
Return buffer
返回填充好的Buffer
Note:The operation will cut off the chain
注意:该操作将会切断调用链
See:.save(file[, type[, config]])
参考:.save(file[, type[, config]])$3
eg:
Encoding and save the current image to a file, if the type is not specified, type well be automatically determined according to the file, config is image setting. eg: