current version : 0.2.3
last update 17/01/2000
author : Nicolas Roard
I'm currently working on the 0.2.4, here is the new features :
- draw plain or translucent triangles (way to polygons)
- pie primitives
- a text primitive, which draw text strings using twinlib primitives, so it's vectoriel and antialiased. The main use is cgi programs using twinlib, which haven't access
to a X server, and therefore to draw text using X. Not useful for everybody, but very interessting at least for me ;-)
- some bugs fixes
There is another graph lib named paintlib, made by Ulrich von Zadow, which you
could find at http://www.paintlib.de .
So i changed the name in TwinLib (thanks to Jérôme Bourguignon).
TwinLib is a small but useful graphic c++ library.
It's designed to help developpers in graphic
programming under Qt , by providing cool functions
like gradients, antialias on graphics primitives
and text, alpha channel support...
The base principle of TwinLib is to declare
an object of type Image (which is the base type of
An object Image is only a QImage object with
many functions around it, so, by example, you could do
something like that :
Image toto ("pipo.jpeg");
toto.line (10,10,100,100,QColor (200,0,0));
Those two lines load a jpeg image in toto, and
trace a red line on it.
If you want to get the QImage contained in toto,
just do a
That's all ! all others things are basically the same,
with others functions (circle, gradients, text, etc.),
so now you could read the html doc ;-)
There are little screenshots of the lib :
First of all, Qt . I used Qt 1.44 but Qt 2 should
be also okay...
The lib require also the Qt's extensions for loading
jpeg and png files.
go and get these on Troll Tech's web site (http://www.troll.no)
(You must get a source version of Qt and compile the extensions)
So, you need of course jpeg and png libs.
You need also tmake, a very powerful tool to make
makefiles : http://www.troll.no/freebies/
Untar twinlib.0.2.3.tgz somewhere.
Now you must compile the library by typing 'make' ;
type make install to install it.
To have the example, type 'make example'.
You should launch ./example to see some examples.
If you want to desinstall TwinLib, just type make uninstall.
I had tested it on a RH6 , Mandrake6 and Mandrake7beta on x86,
all seems to work correctly (don't forget to install
tmake, and to set TMAKEPATH and QTDIR !)
There is the var PATHLIBS in the Makefile, it's the path
to install TwinLib. If the example don't work because
it doesn't find the lib, /sbin/ldconfig should be launched.
Works ugly in 16bpp [reported by Jan Prokop]
idem with Qt2.0 (perhaps the same bug)
Many things, like erase all possibles bugs, adds some
others graphics primitives (splines, etc), adds better
algorithms and improve speed...
For any comments, bugs, you could mail me at email@example.com .
I need to have reports to improve this lib, so
don't hesit ! This lib must have many bugs and
Bad Things, so if you say me, it could be removed
or improved faster...
The changelog is here .
You could download TwinLib 0.2.3 here
An online documentation is available here