generate-image-file

You can generate image file of any size and byte.

You can specify vertical and horizontal size or number of bytes, or both.

$ node app --size 100,100 --byte 2kb

That way, a PNG file of that size will be created in ./images.

Installation

1

Node.js is required.

2

This programming uses node-canvas internally.
So it is essential to install the libraries that node-canvas needs.

If you are a Mac user, you may be able to install it easily with Homebrew.

For details please read the official document.

https://github.com/Automattic/node-canvas

3

$ npm i

This is now completely ready.

Specify vertical and horizontal size

--size -s

Specify by width,height or width*height.

$ node app --size 100,60

Specify number of bytes

--byte -b

$ node app --byte 200

That way, An PNG file of 200 bytes is created.

example

--byte 200 -> 200bytes
--byte 190b -> 190bytes
--byte 2kb -> 2048bytes(= 2 * 1024 = 2kb)
--byte 1.5mb  -> 1572864bytes(= 1.5 * 1024 * 1024 = 1.5mb)

Size and bytes

You can specify both.

$ node app -s 500,280 -b 900

A PNG file that satisfies both conditions is created.

Fill

--fill -f

Usually, a transparent image is created.
However, if this option is specified, an image filled with a specific color will be created.

$ node app -s 100,50 -b 900 -f

Hint

If you run $ node app --help, you can see a list of available options.