cronshot-imagemagick 介绍
cronshot-imagemagick 是 cronshot 中间件，通过
gm 来操作和保存
ImageMagick 处理的图片。
安装
npm install cronshot-imagemagick
示例
var cronshot = require('cronshot'),
middleware = {
'imagemagick': require('cronshot-imagemagick')
};
// Image Magick Example
// --------------------
// Takes a screenshot of sports.yahoo.com,
// and converts the screenshot to be a transparent image using Image Magick
// Image Magick example
cronshot.startCapturing({
// The webpage URL that you would like to take a screenshot of
'url': 'http://sports.yahoo.com',
// The local path where you would like to save the image
'path': __dirname,
// Only takes one screenshot
'cronPattern': false,
// What middleware functions to use each time a screenshot is taken
'saveMiddleware': [{
// Function that does all the Image Magick stuff
'middleware': middleware.imagemagick,
'options': {
'gmCommands': [{
'method': 'trim',
'args': []
}, {
'method': 'transparent',
'args': ['#FFFFFF']
}]
}
}]
}, function(err) {
// optional callback function once all screenshots have been taken
});