GraphicsMagick for node.js环境搭建

发表于 | 更新于 | 分类于 | 评论数： | 阅读次数：

本人背景环境windows7 64位，nodejs v6.11.0，git version 2.7.2.windows.1；

具体步骤如下：

  1. 下载GraphicsMagick，一路Next完成安装，然后cmd调用命令窗口输入gm回车，如果能正确显示类似如下信息说明安装成功：

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    H:\workspace\gm\examples>gm

    GraphicsMagick 1.3.26 2017-07-04 Q16 http://www.GraphicsMagick.org/
    Copyright (C) 2002-2017 GraphicsMagick Group.
    Additional copyrights and licenses apply to this software.
    See http://www.GraphicsMagick.org/www/Copyright.html for details.
    Usage: gm command [options ...]

    Where commands include:
        batch - issue multiple commands in interactive or batch mode
    benchmark - benchmark one of the other commands
        compare - compare two images
    composite - composite images together
        conjure - execute a Magick Scripting Language (MSL) XML script
        convert - convert an image or sequence of images
        help - obtain usage message for named command
    identify - describe an image or image sequence
        mogrify - transform an image or sequence of images
        montage - create a composite image (in a grid) from separate im
        time - time one of the other commands
        version - obtain release version
    register - register this application as the source of messages

  2. 如果只是学习可以cmd命令窗口执行git clone git://github.com/aheckmann/gm.git，然后到该目录下执行npm install完成相关依赖包安装后就可以到examples下试试各种demo了，例如我的执行:

1
2
3
4
5
H:\workspace\gm\examples>node append

H:\workspace\gm\examples/imgs/append.jpg created  ::  gm "convert"
"#222" "H:\workspace\gm\examples/imgs/lost.png" "H:\workspace\gm\e
original.jpg" "-append" "H:\workspace\gm\examples/imgs/append.jpg"

  1. 如果从零开始，实际示例如下：

    创建根目录:

    mkdir gm-study

    到该目录下:

    cd gm-study

    初始化创建package.json:

    npm init

    安装gm:

    npm install gm --save

    创建执行文件:

    type nul>index.js

    打开index.js并黏贴gm官方示例代码并修改路径:

    var fs = require('fs')
, gm = require('gm');

// resize and remove EXIF profile data
gm('imgs/1.jpg')
.resize(240, 240)
.noProfile()
.write('out/resize.png', function (err) {
if (!err) console.log('done');
});

    执行node命令:

    node index