Open Source C Raster Graphics Software

Tux Paint is a free, award-winning drawing program originally created for children ages 3 to 12, but enjoyed by all! It combines an easy-to-use interface, fun sound effects, and an encouraging cartoon mascot who guides children as they use the program. You're presented with a blank canvas and a variety of drawing tools to help them be creative. Along with paintbrush, shapes and text, Tux Paint includes a "stamp" feature to add pre-drawn or photographic imagery to pictures, and a set of "magic tools" that provide filter effects (like blur, tint and waves) and interesting drawing tools (like train tracks, bubbles and grass). Tux Paint includes a collection of "starter" images, both coloring-book style and photo-realistic, and a large collections of stamps are available as a separate download. Additional content can be added by parents & teachers, or downloaded from 3rd parties. Tux Paint is available for Windows, macOS, Android, Linux, & Haiku operating systems, among others.

Reference library for supporting the Portable Network Graphics (PNG) format.

GraphicsMagick provides a set of commandline tools and programming APIs for manipulating, editing, and converting raster and vector images. It is derived from ImageMagick, with the objective of providing better stability and performance than ImageMagick while retaining the original MIT/X11 license.

The Animated Portable Network Graphics (APNG) is an unofficial extension of the Portable Network Graphics (PNG) format. APNG patch provides APNG support to libpng. APNG support was merged! https://github.com/pnggroup/libpng/pull/706

FreeImage is a library project for developers who would like to support popular graphics image formats (PNG, JPEG, TIFF, BMP and others). Some highlights are: extremely simple in use, not limited to the local PC (unique FreeImageIO) and Plugin driven!

A very high quality package of printer drivers for CUPS on Linux and other POSIX-compliant operating systems. This project also maintains an enhanced Print plug-in for GIMP 2.x from the same code base.

mtPaint is a painting program designed for creating icons and pixel-based artwork. It can edit indexed palette or 24 bit RGB images and offers painting, palette, and image manipulation tools.

ImageMagick® is a free and open-source software suite for displaying, converting, and editing raster image and vector image files. It can read and write over 200 image file formats, and can support a wide range of image manipulation operations, such as resizing, cropping, and color correction. ImageMagick is written in C and is available for a wide range of operating systems, including Linux, macOS, and Windows. It can be used as a standalone application, or as a library that can be integrated into other software programs. Overall, ImageMagick is a powerful and versatile software suite for displaying, converting, and editing image files. Its support for scripting and automation, along with its other features, make it a valuable tool for a wide range of image-related tasks.

Darktable is a virtual lighttable and darkroom for photographers: it manages your digital negatives in a database and lets you view them through a zoomable light table. It also enables you to develop raw images and enhance them.

XPaint is a simple paint program for X, suitable for producing simple graphics. It does offer some advanced features such as image processing functions and gradient fill. XPaint was originally written by David Koblas.

CinePaint 1.4.4 Windows version released 2021/5/6. Linux and MacOS versions coming. CinePaint is a deep paint image retouching tool that supports higher color fidelity than ordinary painting tools. CinePaint opens high fidelity image file formats such as DPX, 16-bit TIFF, and OpenEXR, and conventional formats like JPEG and PNG. -- Robin Rowe CinePaint Project Manager Beverly Hills, California robin.rowe@cinepaint.org imdb.me/robinrowe 323-535-0952

Box is a language specifically designed to make vector graphics easy plus a integrated development environment which facilitates the use of the language by interactively showing the graphical output. Box combines the convenience of drawing figures with the mouse with the convenience of describing them with a language tailored for vector graphics.

Agar provides a base GUI framework and a standard set of widgets from which graphical applications can be built which run natively under X11, Windows, MacOS, SDL and others. It takes advantage of texture and GPU acceleration wherever available. Agar can also attach to an existing framebuffer, SDL or OpenGL context and operate as a self-contained window-manager. It includes a standard library of general-purpose widgets, and is also designed to be extended externally. New widgets can be implemented as part of an application or library. Complex user interface elements can be realized often in few lines of code. Agar is also extensible at the low-level. The low-level API is documented such that modular drivers can be written which enable Agar applications to work seamlessly under many platforms graphics systems without any change at the application level.

NAFE -- (not) another font editor -- write and edit linux console font files (.psf) with any text editor

A small and easy-to-use paint program for GNOME, the GNU Desktop. Think of GIMP is like Photoshop as gpaint is like Windows Paint. Gpaint is still work in progress and many features are still being developed. However, gpaint is useable already for small i

Gimp Mac Helper provides a plugin to support copy and paste of images between Gimp and native apps on Mac OS X.

Libpsd is the Photoshop file format decode library in C language with full source code. It mainly decodes and blends *.psd files. It supports for Adobe Photoshop CS version, and is compatible with the previous versions of Photoshop.

Animal is AN IMAging Library written in C. Its simple API supports over 80 image formats, and is intended to make massive use of other image processing libraries. Animal aims at image analysis and recognition. It is mainly the C basis of the SIP toolbox.

GIMP Plug-In set for 360° panoramas =================================== This plugin set contain 4 plugins helpful in 360° equirectangular panorama creation: * fill_zenith_nadir - fills transparent areas on the top and the bottom of the generated panorama with a gradient that smoothly connects to the neighbour pixels * panorama_to_zenith_nadir - converts panorama to editable form of zenith and nadir areas. This allows for easy editing, eg. patching, filling, placing a logo * zenith_nadir_to_panorama - converts back the editable zenith and nadir to panorama projection * set_google_plus_metadata - attach metadata needed to publish panorama on Google+

Picture viewer/editor. It is intended mainly for quick and easy digital photos manipulation. Optimized for minimal amount of keypresses. Planned features include working with groups of pictures, undo/redo, Motion JPEG support.

GFourier is a GIMP plug-in to manipulate images in the frecuency domain, using Fourier Transform.

Bildster is an image processing library for educational purposes that provides tools for loading and manipulating (or creating) images. It provides a split screen view (before / after). Both, a C and a Java version exist. Das Projekt stellt das Programmpaket "Bildster" bereit --- eine Entwicklungsumgebung für Bildverarbeitungsprogramme. Es gibt eine C-Version für Linux und eine plattformunabhängige Java-Version. Das Programm eignet sich für den Informatikunterricht in der Oberstufe. Lizenz ist GPL 3.

darknocK detects edges in images. It is using Artificial Neural Networks to enchance the results of standard algorithms.

This is a new version of the PNGQuant software to quantize a 32 bits PNG downto 8 bits with transparency. Resulting images can display correctly in all modern browser including IE5.0 and later without ugly javascript or flash hack.