[中文版] [update log]

Table

1. Install
2. Gulp Version
3. How To Write CSS
4. How To Write JS
5. Example

Install

npm install css-img-sprite

Gulp Version

• Gulp : gulp-css-img-sprite

How To Write CSS

shop: bag:

• add '?__sprite' or '?__spriter' at the end of url to do sprite:

.image1 {
    margin: 10px;
    width: 100px;
    height: 30px;
    background: url("test/image/shop.png?__spriter") 0 0;
    border: 3px solid black;
}
.image2 {
    margin: 10px;
    width: 50px;
    background: url("test/image/bag.png?__spriter") 0 0;
    height: 50px;
    border: 3px solid black;
}

after sprite: new image: new css file:

.image1 {
    margin: 10px;
    width: 100px;
    height: 30px;
    border: 3px solid black;
    background-repeat: no-repeat;
}
.image2 {
    margin: 10px;
    width: 50px;
    height: 50px;
    border: 3px solid black;
    background-repeat: no-repeat;
}
.image1 {
    background-position: -6px 0px
}
.image2 {
    background-position: 0px -47px
}
.image1, .image2 {
    background-image: url("test/image/base_f4aff81c22_z.png")
}

• you can scale the image by set background-size.we can put the same scale images into one output image.

• you can not use repeat,repeat-x or repeat-y with scale!=1,for example: you scale the image 2 times and you also use repeat-x,as a result, although you add '?__spriter',you will not get sprite image.

.image {
    width: 70px;
    background: url("test/image/bag.png?__spriter") repeat-x 0 200px;
    background-size: 100px auto;
    height: 10px;
}

you can write css like this:

.image {
   width: 70px;
   background: url("test/image/bag.png?__spriter") repeat-x 0 200px;
   background-size: 50px auto;
   height: 10px;
}
/*or*/
.image2 {
   width: 70px;
   background: url("test/image/bag.png?__spriter") repeat-x 0 200px;
   height: 10px;
}

• you can use auto to set background-size

.image1 {
    background: url("test/image/bag.png?__sprite") 0 0;
    background-size: auto 50px;
}
/* or */
.image1 {
    background: url("test/image/bag.png?__sprite") 0 0;
    background-size: 50px 50px;
}
/* or */
.image1 {
    background: url("test/image/bag.png?__sprite") 0 0;
    background-size: auto auto;
}

important:we will do nothing about unsprite image.so you need to copy unsprite image into new folder.and you need to take care the folder structure because we will not change the unsprite image url in 'background-image'

How To Write JS

• API:
  1. raw ( content , spriteObj )
  2. sprite ( spriteObj , callback )
  3. spriteSync ( spriteObj )
• Arguments Guide

/**
 *  arguments:
 *      content:{buffer} css file content
 *      spriteObj:{object}
 *          spriteObj.cssSrc:{string} although you give content,we still need file name,so,give us cssSrc
 *          [spriteObj.cssDesDir]:{string} css output dir ,default:cssSrc.we do not write new css file for you,
 *                                             you need do it yourself.we need it because we need to change
 *                                             css background-image:url()
 *          [spriteObj.imgDesDir]:{string} image output dir,default:cssSrc
 *          [spriteObj.layout]:{string} "linear"(default)|"matrix".matrix will use bin-packing
 *          [spriteObj.hash]:{boolean} add hash flag on sprite image
 *          [spriteObj.errLog]:{boolean} output err in .spritelog file
 *      callback:{function} callback(err)
 *  return:
 *      content:{buffer} new css file content
 *
 **/

raw is a low level api.you need to read css content and write new css file.

Example

you can see the usage in test folder