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Albrecht Schlosser 3bbc453237 Save and restore GL parameters as appropriate 
According to the docs "glPixelStorei sets pixel storage modes that
affect the operation of subsequent glReadPixels as well as the
unpacking of texture patterns (see glTexImage2D and glTexSubImage2D)."

Hence we
(a) must be aware that current values of these modes can be anything
    set by user or FLTK code before
(b) should be polite and restore these modes to previous values

See discussion in fltk.coredev, thread "gl_draw problem" started on
Apr 05, 2019.
2019-04-10 17:02:04 +02:00
cairo Update dependencies 2019-03-28 11:42:09 +01:00
CMake Android CMake: icons, docs, more apps 2019-01-17 21:29:24 +01:00
documentation Revert back to previous state 2019-04-04 18:51:16 +02:00
examples Update procedure for OpenGL3 support. 2019-04-04 18:42:45 +02:00
FL Make member function Fl_Surface_Device::driver(Fl_Graphics_Driver*) protected. 2019-04-10 15:20:00 +02:00
fluid Fix potential crash in fluid (issue #14) 2019-04-04 17:20:57 +02:00
GL Modifications to all LGPL headers for STR #2685. 2011-07-19 04:49:30 +00:00
jpeg Replace "WIN32" with "_WIN32" or "Windows". 2018-02-09 14:39:42 +00:00
lib Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
misc Add abi-compliance-checker howto. 2019-01-02 15:33:34 +01:00
nanosvg Removed all shadow lint in header files (STR #2714). 2019-02-02 22:29:53 +01:00
png Remove obsolete watcom makefiles. 2015-03-17 14:53:09 +00:00
public Activate GitLab CI and GitLab Pages (HTML docs). 2018-06-22 16:31:30 +00:00
src Save and restore GL parameters as appropriate 2019-04-10 17:02:04 +02:00
test Update dependencies 2019-03-28 11:42:09 +01:00
zlib Remove obsolete watcom makefiles. 2015-03-17 14:53:09 +00:00
.clang-format Update .clang-format, improve comments. 2017-12-19 13:26:38 +00:00
.gitattributes Don't export gitlab and travis CI control files 2019-03-10 12:23:52 +01:00
.gitignore Make .gitignore ignore CMake autogenerated files and also visual studio .vs directory 2018-12-22 08:56:33 -06:00
.gitlab-ci.yml Update GitLab CI configuration (comments only). 2018-07-31 10:05:54 +00:00
.travis.yml Add more branches to Travis-CI control file 2019-02-16 12:07:49 +01:00
abi-version.cmake.in Remove copyright markers from abi-version.* (STR #3161). 2016-07-29 18:50:24 +00:00
abi-version.in Remove copyright markers from abi-version.* (STR #3161). 2016-07-29 18:50:24 +00:00
ANNOUNCEMENT Fix ignored files, add 'build' directory to ignored files. 2016-11-11 21:18:42 +00:00
autogen.sh Add an autogen.sh script as is customary for autoconf based 2013-12-13 10:19:54 +00:00
CHANGES_1.0.txt Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
CHANGES_1.1.txt Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
CHANGES_1.3.txt Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
CHANGES.txt Fix typos 2019-02-09 21:21:48 +01:00
CMakeLists.txt Android CMake: fix, more autogenerated files 2019-01-16 02:12:29 +01:00
configh.cmake.in Removed macro FL_PORTING, as it has been more confusing than helpful. 2018-06-23 17:04:18 +00:00
configh.in Removed macro FL_PORTING, as it has been more confusing than helpful. 2018-06-23 17:04:18 +00:00
configure.ac Fix for STR#3473 (and its duplicate STR#3507) 2019-01-30 17:58:22 +01:00
COPYING Finished up changes for references to fltk-bugs@fltk.org -> STR form. 2010-04-28 07:21:41 +00:00
CREDITS.txt Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
DartConfig.cmake
fltk-config.in Fix line endings and other (svn) properties of fltk-config.in. 2018-08-03 09:18:07 +00:00
fltk.list.in Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
fltk.spec.in [Version 1.3.4] Update version numbers - hopefully complete. 2015-03-10 01:41:55 +00:00
fltk.xpm Fixed all Pixmaps to be '*const' (STR #3108). 2019-02-05 00:14:37 +01:00
forms.h
install-sh
mac_endianness.h Modifications to all LGPL headers for STR #2685. 2011-07-19 04:49:30 +00:00
Makefile Rename configure.in to configure.ac. 2016-09-30 21:09:59 +00:00
makeinclude.in CMake: Fix fltk-config for Windows and Unix/Linux. 2018-02-23 19:41:52 +00:00
makesrcdist Update makesrcdist (internal use only) 2019-02-12 14:07:53 +01:00
README.abi-version.txt Improve ABI configuration documentation 2019-01-19 17:20:05 +01:00
README.Android.md Android: starting to use CMake to build AndroidStudio files. 2019-01-15 01:22:18 +01:00
README.bundled-libs.txt Update nanosvg library to current upstream version 2019-01-31 19:06:06 +01:00
README.Cairo.txt Add documentation on how to build Cairo in Linux Debian and derivatives. 2018-12-25 12:25:35 -06:00
README.CMake.txt Add a CMake option to generate driver (developer) documentation. 2018-12-29 20:35:10 +01:00
README.IDE.txt Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
README.macOS.md Small improvements to README.macOS.md 2019-02-05 11:24:06 +01:00
README.md Remove the statement that this is a mirror. 2018-12-03 18:54:07 +01:00
README.Pico.txt MSWindows fixes for previous commits. 2016-04-17 17:45:44 +00:00
README.txt Rename README files to README.txt (and several similar files). 2018-12-10 16:50:56 +01:00
README.Unix.txt Replace "WIN32" with "_WIN32" or "Windows". 2018-02-09 14:39:42 +00:00
README.Windows.txt Replace "WIN32" with "_WIN32" or "Windows". 2018-02-09 14:39:42 +00:00
VERSION Bump version numbers for next minor release: FLTK 1.4.0. 2016-01-30 00:56:42 +00:00

README.md

README - Fast Light Tool Kit (FLTK) Version 1.4.0

** This FLTK repository is now our official source code repository. **

WHAT IS FLTK?

The Fast Light Tool Kit ("FLTK", pronounced "fulltick") is a
a cross-platform C++ GUI toolkit for UNIX(r)/Linux(r) (X11),
Microsoft(r) Windows(r), and MacOS(r) X. FLTK provides
modern GUI functionality without the bloat and supports 3D
graphics via OpenGL(r) 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 in the US.

For more information see file README.