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README.md

GD Graphics (Draw) Library

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GD is an open source code library for the dynamic creation of images by programmers.

GD is written in C, and "wrappers" are available for Perl, PHP and other languages. GD can read and write many different image formats. GD is commonly used to generate charts, graphics, thumbnails, and most anything else, on the fly.

The most common applications of GD involve website development, although it can be used with any standalone application!

The library was originally developed by Thomas Boutell and is now maintained by many contributors (see the CONTRIBUTORS file) under the umbrella of PHP.net.

If you like to contribute, report bugs, see how to contribute document

For security related issues, please contact us at security@libgd.org

Support available in Chat or using issues.

We also have a mailing list. To subscribe to any mailing list, send an email to gd-devel-subscribe@lists.php.net. Then emails can be sent to gd-devel@lists.php.net.

Downloads/etc...

Please visit our homepage for more details.

Supported Image Formats

GD has builtin support for:

It also has optional support for more formats via external libraries:

Besides that, GD depends on some external libraries, which are all optional and disabled by default:

  • FreeType for rendering fonts
  • Fontconfig for configuring and customizing font access
  • libraqm for complex text layout
  • libimagequant for conversion of RGBA images to 8-bit indexed-color images
    • NOTE libimagequant is dual-licensed: GPLv3 and commercial license