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hacksparrow
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Description

Node.js module for image processing and manipulation

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EasyImage NPM version

EasyImage is a promise-based image processing module for Node.js, it is built on top of ImageMagick, so make sure ImageMagick is installed on your system.

Installation

EasyImage 3 is only compatible with NodeJS 4 or greater.

$ npm install --save easyimage

For NodeJS 0.12, use EasyImage 2

$ npm install --save [email protected]

Quick Start

Get info about an image.

import {info} from "easyimage";
try {
    const imageInfo = await info("/path/to/image.jpg");
} catch (e) {
    console.log("Error: ", e);
}

Convert an image from JPG to PNG.

import {convert} from "easyimage";
try {
    await convert({
        src: "/path/to/source.jpg",
        dst: "/path/to/dest.png",
    });
} catch (e) {
    console.log("Error: ", e);
}

Create a thumbnail.

import {thumbnail} from "easyimage";
try {
    const thumbnailInfo = await thumbnail({
        src: "/path/to/source.jpg",
        width: 100,
        height: 100,
    });

console.log("Thumbnail is at: " + thumbnailInfo.path);

} catch (e) { console.log("Error: ", e); }

Usage

The EasyImage module is ES6 compatible. You can import just the commands that you will need.

Every command which takes an options object which extends from IBaseOptions. You can use any of the parameters defined on

IBaseOptions
. For example, to prevent EasyImage from auto-orientating your image, you can pass
autoOrient: false
on any command.

Every command must have a

src
parameter. If you do not specify a
dst
, then a random file will be created. Be sure to clean up randomly created files by either moving them to permanent storage, or deleting them. Some commands have other required options.

See the Docs for all available options for each command.

convert

The convert() command can convert an image file from one type to another.

crop

The crop() command will crop an image to the specified size.

resize

The resize() command will resize an image to the specified size.

rescrop

The rescrop() command will resize and crop an image to the specified size.

rotate

The rotate() command will rotate an image by the specified number of degrees.

thumbnail

The thumbnail() command will create a thumbnail of the specified image.

Helper Commands

In addition to the above commands, there are three other commands available.

info

The info() command will give you details about an image file.

execute

The execute() command allows you directly run ImageMagick with your own tool and arguments. It will handle calling the appropriate ImageMagick version, and return the raw

stdout
and
stderr
to you.

getImageMagickVersion

The getImageMagickVersion() command will return the detected version of ImageMagick.

Error Handling

There are 5 different types of errors that can be thrown.

  • BadDestinationError
  • ImageMagickMissingError
  • MissingExtensionError
  • MissingOptionsError
  • UnsupportedError

Which allows you to catch specific errors.

import {convert, MissingOptionsError} from "easyimage";

async function shouldError() { try { await convert({}); console.log("I should not show"); } catch (MissingOptionsError e) { console.log("I should show"); } catch (Error e) { console.log("I should not show either"); } }

License (MIT)

Copyright (c) 2015 Hage Yaapa <http://www.hacksparrow.com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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