kimageformats/README.md
Heiko Becker e5fce91de6 Remove DDS and JPEG-2000 plugins
They were already disabled when building with Qt >= 5.3 in commit
3d45b270ea because Qt has better plugins
for those image formats. Now that we depend on Qt 5.3 we can remove
them.

REVIEW: 124636
2015-08-06 00:57:14 +02:00

64 lines
1.9 KiB
Markdown

# KImageFormats
Plugins to allow QImage to support extra file formats.
## Introduction
This framework provides additional image format plugins for QtGui. As
such it is not required for the compilation of any other software, but
may be a runtime requirement for Qt-based software to support certain
image formats.
## Formats
The following image formats have read-only support:
- Gimp (xcf)
- OpenEXR (exr)
- Photoshop documents (psd)
- Sun Raster (ras)
The following image formats have read and write support:
- Encapsulated PostScript (eps)
- Personal Computer Exchange (pcx)
- SGI images (rgb, rgba, sgi, bw)
- Softimage PIC (pic)
- Targa (tga): supports more formats than Qt's version
- XView (xv)
## Contributing
See the QImageIOPlugin documentation for information on how to write a
new plugin.
The main difference between this framework and the qimageformats module
of Qt is the license. As such, if you write an imageformat plugin and
you are willing to sign the Qt Project contributor agreement, it may be
better to submit the plugin directly to the Qt Project.
Note that the imageformat plugins provided by this module also provide a
desktop file. This is for the benefit of KImageIO in the KDE4 Support
framework.
## Duplicated Plugins
The TGA plugin supports more formats than Qt's own TGA plugin;
specifically, the one provided here supports indexed, greyscale and RLE
images (types 1-3 and 9-11), while Qt's plugin only supports type 2
(RGB) files.
The code for this cannot be contributed upstream directly because of
licensing. If anyone were willing to write fresh code to improve Qt's
TGA plugin, it would allow the TGA plugin in this framework to be
removed.
## License
This framework is licensed under the
[LGPLv2.1](http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html#SEC1).
The CMake code in this framework is licensed under the
[BSD license](http://opensource.org/licenses/BSD-3-Clause).