GD image format
From Just Solve the File Format Problem
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== Links == | == Links == | ||
* [https://libgd.github.io/ LibGD website] | * [https://libgd.github.io/ LibGD website] | ||
| − | * [https://libgd.github.io/manuals/2.3.0/files/gd_gd-c.html LibGD website format info | + | * [https://libgd.github.io/manuals/2.3.0/files/gd_gd-c.html LibGD website format info] |
Revision as of 18:23, 28 December 2023
GD image format is a raster graphics file format associated with the GD graphics library (a.k.a. LibGD), originally developed by Thomas Boutell.
The GD image format is a special purpose format that can be read very quickly. It is not GD's preferred format -- standard formats like GIF and PNG are preferred.
There are several versions of GD format.
See also GD2 image format.
Contents |
Identification
GD 1.x: There's no easy way to identify this format version.
GD 2.x palette color: Starts with bytes 0xff 0xff, and has 0x00 at offset 6.
GD 2.x truecolor: Starts with bytes 0xff 0xff (v2.0.0-2.0.11) or 0xff 0xfe (v2.0.12+), and has 0x01 at offset 6.
Specifications
- Refer to the source code comments in modern versions of the gd_gd.c file.
Software
- GD/LibGD
- GD 1.2, from the Wayback Machine
- https://ftp.mizar.org/packages/gd/ - Various versions
- See the LibGD website for the latest release.
- LibGD GitHub project
