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FLTK - Fast Light Tool Kit - https://github.com/fltk/fltk - cross platform GUI development
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ManoloFLTK 22dfda94c8 Fix macOS crash when drawing image with draw_image() in some scenarios (#1372)
2026-03-09 14:48:24 +01:00
.github Fix "fully support ... own shared libraries" (#1238) 2025-04-21 22:00:35 +02:00
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configh.cmake.in Fix: Fl_Native_File_Chooser::filter_value() [Kdialog] always returns 0 (#899) 2024-04-22 16:34:08 +02:00
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COPYING
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README.experimental.txt Remove experimental platforms Android, Pico, SDL (PR #376) 2022-01-23 18:12:47 +01:00
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README.md

README - Fast Light Tool Kit (FLTK) Version 1.4.4

What is FLTK?

The Fast Light Tool Kit (FLTK) is a cross-platform C++ GUI toolkit for UNIX®/Linux® (X11 or Wayland), Microsoft® Windows®, and macOS®. FLTK provides modern GUI functionality without bloat and supports 3D graphics via OpenGL® and its built-in GLUT emulation. It was originally developed by Mr. Bill Spitzak and is currently maintained by a small group of developers across the world with a central repository on GitHub.

https://www.fltk.org/ https://github.com/fltk/fltk/

Licensing

FLTK comes with complete free source code. FLTK is available under the terms of the GNU Library General Public License with exceptions (e.g. for static linking). Contrary to popular belief, it can be used in commercial software! (Even Bill Gates could use it.)

Online Documentation

The documentation in HTML and PDF forms can be created by Doxygen from the source files. HTML and PDF versions of this documentation are also available from the FLTK web site at:

https://www.fltk.org/documentation.php

Further Information

For more information see README.txt: https://github.com/fltk/fltk/blob/branch-1.4/README.txt

Build

Build FLUID User Manual.