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gulp-retina-resizer

v1.0.0

Published

resize images

Readme

本插件用于在 Gulp 中转换图片大小,可从3倍图转换到2倍或1倍,也可从2倍转到1倍。

依赖软件

本插件依赖 gm,故也须安装本地软件 GraphicsMagick 或 ImageMagick。

##使用方法 ##

'use strict';

let gulp = require('gulp');
let resizer = require('gulp-retina-resizer');

gulp.task('default', function() {
	gulp.src('slice/*.png')
		.pipe(resizer({
			base: 3,
			to: [1, 2],
			copy: true,
			im: true
		}))
		.pipe(gulp.dest('dest'))
});

参数说明

如上例子,resizer 接受一个对象作为参数(可选),默认为

{
	base: 2,
	to: 1,
	copy: false,
	im: false
}
  1. base:数字,是原始图的倍数比
  2. to:数字或数组,生成图的倍数比
  3. copy: 布尔值,是否添加按原始图的倍数比生成的图
  4. im:布尔值,为 true 时使用 ImageMagick 处理图片,否则使用 GraphicsMagick

生成的图片的尺寸将保证可以被生成图的倍数比整除。例如:大小为60x61的3倍图转2倍图时,得到的2倍图大小为40x42,如果 copytrue,还将得到60x63的3倍图。

可从3倍图转换到2倍或1倍,亦可从2倍转到1倍。即只能由高到低,不能由低到高。