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5. yoya/io\_png

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yoya/io\_png
============

PNG library

2.0.3(2y ago)2281MITPHPPHP >=5.1.0

Since Dec 8Pushed 11mo ago1 watchersCompare

[ Source](https://github.com/yoya/IO_PNG)[ Packagist](https://packagist.org/packages/yoya/io_png)[ Docs](http://pwiki.awm.jp/~yoya/?IO_PNG)[ RSS](/packages/yoya-io-png/feed)WikiDiscussions master Synced 2mo ago

READMEChangelog (5)Dependencies (1)Versions (13)Used By (0)

IO\_PNG
=======

[](#io_png)

PNG parser & dumper

Usage
=====

[](#usage)

```
% composer require yoya/io_png
% php vendor/yoya/io_png/sample/pngdump.php
Usage: php pngdump.php -f  [-h]
ex) php pngdump.php -f test.png -h
% php vendor/yoya/io_png/sample/pngdump.php -f input.png
Name:IHDR Size=13 CRC=1946785227
  Width:256 Height256 BitDepth:1 ColorType:0(GRAY) Compression:0 Filter:0 Interlate:0
Name:gAMA Size=4 CRC=201089285
    Gamma:0.45455
Name:cHRM Size=32 CRC=2629456188
             0  1  2  3  4  5  6  7   8  9  a  b  c  d  e  f  0123456789abcdef
0x00000000  00 00 7a 26 00 00 80 84  00 00 fa 00 00 00 80 e8    z&

```

###  Health Score

34

—

LowBetter than 77% of packages

Maintenance37

Infrequent updates — may be unmaintained

Popularity11

Limited adoption so far

Community10

Small or concentrated contributor base

Maturity65

Established project with proven stability

 Bus Factor1

Top contributor holds 83.3% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~207 days

Recently: every ~364 days

Total

12

Last Release

796d ago

Major Versions

1.2.5 → 2.0.02020-05-07

### Community

Maintainers

![](https://www.gravatar.com/avatar/b46aabd829c382299018b8def059e03a2546cad928803c5d5dc14d036251f42c?d=identicon)[yoya](/maintainers/yoya)

---

Top Contributors

[![yoya](https://avatars.githubusercontent.com/u/26040?v=4)](https://github.com/yoya "yoya (65 commits)")[![yoya-awm](https://avatars.githubusercontent.com/u/40281283?v=4)](https://github.com/yoya-awm "yoya-awm (13 commits)")

---

Tags

imagepng

### Embed Badge

![Health badge](/badges/yoya-io-png/health.svg)

```
[![Health](https://phpackages.com/badges/yoya-io-png/health.svg)](https://phpackages.com/packages/yoya-io-png)
```

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