https://github.com/tleguern/pngblank

The pngblank utility generates fully transparent square pictures.
https://github.com/tleguern/pngblank

openbsd png png-image-generate

Last synced: about 1 month ago
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The pngblank utility generates fully transparent square pictures.

• Host: GitHub
• URL: https://github.com/tleguern/pngblank
• Owner: tleguern
• License: isc
• Created: 2020-04-23T13:50:48.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2023-03-07T23:01:32.000Z (over 3 years ago)
• Last Synced: 2025-07-29T03:49:10.775Z (11 months ago)
• Topics: openbsd, png, png-image-generate
• Language: C
• Size: 46.9 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# pngblank

The pngblank utility generates fully transparent PNG images.

## Contents

1. [Install](#install)

2. [Instructions](#instruction)

3. [License](#license)

## Install

### Requires

* C compiler ;

* libz ;

* libdeflate.

### Build

To install globally:

    $ ./configure

    $ make

    # make install

To install in your `$HOME/bin`:

    $ ./configure PREFIX=~

    $ make

    $ make install

## Instructions

To see a description of its options see the [man](./pngblank.md) page.

`pngblank` can generates images using various colour modes, bit depths and compression level.

For a 2,5 kilobytes monstrosity one can type:

    $ pngblank -l 1 -s huffmanonly 80 > big.png

    $ ls -ngh big.png

    -rw-r--r--  1 0   2.5K Apr 24 12:43 big.png

But if you prefer your files small and lean `pngblank` got you covered too:

    $ pngblank -g -b 1 80 > small.png

    $ ls -ngh small.png

    -rw-r--r--  1 0    88B Apr 24 12:43 small.png

## License

All the code is licensed under the ISC License.

It's free, not GPLed !